CN101866632A

CN101866632A - Panel of LCD and counter-rotating thereof, switching and method of operating and equipment

Info

Publication number: CN101866632A
Application number: CN201010166978A
Authority: CN
Inventors: Y-李
Original assignee: Apple Computer Inc
Current assignee: Apple Inc
Priority date: 2009-04-20
Filing date: 2010-04-20
Publication date: 2010-10-20

Abstract

Panel of LCD and counter-rotating thereof, switching and method of operating and equipment are disclosed.Counter-rotating for example is staggered 2 lines counter-rotating, staggered 1 line counter-rotating or the N line counter-rotating that interlocks.Staggered counter-rotating can be on array 2 lines in this array of counter-rotating on duration of a shown frame, 1 line or N bar line.Described switching device and the method that is used for panel of LCD can comprise high impedance power reduction technology, and this technology can be used separately or combine application with various inversion technique.Specifically, the electrode driver that is used for " free time " line of staggered 1 line, 2 lines or the counter-rotating of N line can be switched to high impedance status, makes the respective drivers that is used for idle line adopt the power that reduces during counter-rotating " activity " line.

Description

Panel of LCD and counter-rotating thereof, switching and method of operating and equipment

The cross reference of related application

The application requires in the U.S. Provisional Patent Application No.61/170 that is entitled as " STAGGERED LINEINVERSION AND POWER REDUCTION SYSTEM AND METHODFOR LCD PANELS " of submission on April 20th, 2009,944 and U.S. Patent application No.12/704,349 right of priority, the full content of above-mentioned application is incorporated into this by reference.

Technical field

Power management and pixel that the disclosure relates generally to LCD refresh.

Background technology

This part be intended to the reader introduce may be relevant with the various aspects of the present disclosure that describe below and ask for protection this area in various aspects.Believe that this discussion helps to provide background information to the reader, thereby be convenient to understand better various aspects of the present disclosure.Therefore, should be appreciated that read these from this angle discusses, rather than these argumentation readings are the introducing of prior art.

Electronic equipment day by day comprises the part of display screen as the user interface of equipment with increasing.As is understood, display screen can be used in the equipment of wide scope, comprises desk side computer system, notebook, hand-held computing equipment, cellular phone and portable electronic device.LCD (LCD) panel day by day popularly is used in these equipment.This popularization can give the credit to the in light weight and slim body of LCD panel, and consumes relatively low power and operate the pixel of LCD to generate image on LCD.

For any given pixel in the LCD monitor, visible light quantity depends on the voltage that is applied to this pixel on LCD.Yet, apply the pixel that single direct current (DC) voltage may finally damage display.Therefore, in order to prevent this possible damage, LCD replaces or counter-rotating the voltage that is applied to pixel at each pixel usually between positive and negative DC value.This counter-rotating makes that ensemble average dc voltage in time is zero, and does not have the loss in the brightness, and this is because can select identical voltage root mean square at positive and negative DC value.

This counter-rotating can be undertaken refreshing the voltage of LCD by line ground, thereby realizing that line at LCD reverses refreshes.Similarly, LCD is the polarity by switching every line and transmit necessary voltage to each pixel and refresh panel usually, thereby refresh panel at each refresh cycle (being generally 60Hz) by line ground effectively.In the LCD of other types, counter-rotating can be by carry out " frame ", so that entire frame is remained under a kind of polarity at one-period, thereby refresh all lines (OK) to a last line ground from article one line, at following one-period entire frame is switched to opposite polarity then, article one line from panel refreshes to a last line ground once more.In frame refreshes, whenever switch the polarity (being per second 60 times for example) of " frame " periodically at the 60Hz refresh rate.The type that depends on the LCD panel, some refresh technique can cause undesirable pseudomorphism or visual effect.In addition, along with demand sustainable growth, need to consume more low power LCD inversion technique and image refreshing technology to portable set.

Summary of the invention

Summarized specific embodiment disclosed herein below.Should be appreciated that providing these aspects only is for the summary to these specific embodiments is provided to the reader, these aspects are not to be intended to limit the scope of the present disclosure.In fact, the many aspects of not setting forth below the disclosure can contain.

Disclosed system and method is at various inversion technique, and for example staggered 2 lines counter-rotating, staggered 1 line counter-rotating or the N line that interlocks reverse.The 2 bar lines of counter-rotating in this array on the duration of the frame that staggered counter-rotating can show on array, 1 line or N bar line.Additional system and method can comprise high impedance power reduction technology, and this high impedance power reduces technology and can use separately or use in combination with various inversion technique.Specifically, the electrode driver that is used for " free time " line of staggered 1 line, 2 lines or the counter-rotating of N line can be switched to high impedance status, makes the corresponding drivers that is used for idle line use the power that reduces during counter-rotating " activity " line.

Description of drawings

By reading following detailed description and, will understand various aspects of the present disclosure better, in the accompanying drawing with reference to accompanying drawing:

Fig. 1 is the block diagram according to the example components of the electronic equipment of disclosure many aspects;

Fig. 2 is the front elevation according to the hand-held electronic equipment of disclosure many aspects;

Fig. 3 is the view according to the computing machine of disclosure many aspects;

Fig. 4 is according to the switching of the LCD pixel of disclosure many aspects and the block diagram of display circuit;

Fig. 5 is the cross sectional side view that is orientated the LCD pixel of the liquid crystal molecule of forbidding that light passes through according to having of disclosure many aspects;

Fig. 6 adopts the synoptic diagram of the LCD array that separates public electrode according to the embodiment of the invention at even number line and odd number line;

Fig. 7 A and 7B show the staggered 2 lines counter-rotating at the array among Fig. 6 according to the embodiment of the invention;

Fig. 8 A and 8B show the signal graph with staggered 2 lines counter-rotating that high impedance power reduces at the array among Fig. 6 according to the embodiment of the invention;

Fig. 9 A and 9B show the signal graph with staggered 1 line counter-rotating that high impedance power reduces at the array among Fig. 6 according to the embodiment of the invention;

Figure 10 and 11 has shown according to the illustration of the embodiment of the invention circuit diagram of the driver of high impedance power reduction technology;

Figure 12 shows N the synoptic diagram that separates the array of public electrode that have according to the embodiment of the invention;

Figure 13 shows the staggered N line counter-rotating that high impedance power reduces that has at the array among Figure 12 according to the embodiment of the invention;

Figure 14 shows the synoptic diagram that grouping separates the array of public electrode that has according to the embodiment of the invention;

Figure 15 shows the synoptic diagram according to the array with each self-separation public electrode of the embodiment of the invention; And

Figure 16 has shown according to the illustration of the embodiment of the invention circuit diagram of the driver of array among Figure 15 of high impedance power reduction technology.

Embodiment

Below one or more specific embodiments will be described.For the simple and clear description to these embodiment is provided, all features in actual the enforcement are not described in instructions.Be to be understood that, as in any engineering or the design item, in any this actual exploitation of implementing, must carry out numerous decision-makings specific to enforcement, to realize developer's the meeting specific objective different, for example meet restriction relevant and the restriction relevant with business with system with enforcement.In addition, should be appreciated that this development effort may be complicated and time-consuming, but be normal design, making and manufacturing of example for benefiting from those of ordinary skill of the present disclosure.

The disclosure relates to the visual artefacts and the power that reduce the LCD panel and uses.According to the disclosure, the LCD panel can comprise array, and this array comprises various inversion technique, for example staggered 2 lines counter-rotating, staggered 1 line counter-rotating or the N line counter-rotating that interlocks.High impedance power reduces technology and can use separately or use in combination with various inversion technique.Specifically, the electrode driver that is used for " free time " line of staggered counter-rotating can be switched to the 3rd high impedance status, makes these drivers adopt the power that reduces during the counter-rotating active line.

Consider above these features, the describe, in general terms of suitable electronic equipment that employing is had the LCD display of these features is provided below.In Fig. 1, provide that illustrate can be at the block diagram that is suitable for adopting the various parts that exist in the electronic equipment of these technology.In Fig. 2, show an example that is fit to electronic equipment, be given hand-held electronic equipment here.In Fig. 3, show another example that is fit to electronic equipment, be given computer system here.The electronic equipment of these types and provide other electronic equipments of suitable display capabilities to be used in combination with these technology.

An example that is fit to electronic equipment can comprise contributive various inside of the function of equipment and/or external component.Fig. 1 is an illustration can in this electronic equipment 8, exist and can allow the block diagram of equipment 8 according to the parts of technique works discussed here.Persons of ordinary skill in the art will recognize that the various functional blocks shown in Fig. 1 can comprise the combination of hardware element (comprising circuit), software element (comprising the computer code that is stored on the computer-readable medium) or hardware element and software element.Shall also be noted that Fig. 1 only is a concrete example of implementing, and only be intended to the unit type that illustration can exist in equipment 8.For example, in this illustrated embodiment, these parts can comprise display 10, I/O port one 2, input structure 14, one or more processor 16, memory device 18, non-volatile storage device 20, expansion card 22, network devices 24 and power supply 26.

About in these parts each, display 10 can be used for showing the various images that generated by equipment 8.In one embodiment, display 10 can be LCD (LCD).For example, display 10 can be the LCD that adopts fringing field to switch to switch (IPS) in (FFS), the face or operate the other technologies that this LCD equipment can use.In addition, in the specific embodiment of electronic equipment 8, display 10 can provide in combination with the touch sensitive elements (for example, touch-screen) of the part of the control interface that can be used as equipment 8.

I/O port one 2 can comprise that configuration (for example is used to be connected to various external units, power supply, headphone or head phone or other electronic equipments are (for example, portable equipment and/or computing machine, printer, projector, external display, modulator-demodular unit, docking station (docking station), or the like)) port.I/O port one 2 can be supported any interface type, for example USB (universal serial bus) (USB) port, video port, port connected in series, IEEE-1394 port, Ethernet or modem port and/or AC/DC power connector end mouth.

Input structure 14 can comprise various devices, circuit and passage, user's input or feedback can be offered processor 16 by them.This input structure 14 can be configured to opertaing device 8, the application of operation on equipment 8 and/or be connected to electronic equipment 8 or any interface of being used by electronic equipment 8/or the function of device.For example, input structure 14 can allow user navigate shown user interface or application interface.The example of input structure 14 can comprise button, slider, switch, control panel, key, knob, roller, keyboard, mouse, touch pad or the like.

In a particular embodiment, input structure 14 and display 10 can provide together, and for example under the situation of touch-screen, touch-sensitive mechanism and display 10 provide in combination.In such an embodiment, the user can select shown interface element or carry out mutual with it by touch-sensitive mechanism.Like this, shown interface can provide interactive function, thereby allows the user by the touch display 10 shown interface of navigating.

Can generate the electric signal of expression user input with the user interactions of input mechanism 14 (for example, be presented at the mutual of user on the display 10 or application interface).These input signals can be routed to processor 16 to be further processed by suitable passage (for example, input hub or bus).

Processor 16 can provide processing power, thus any other function of executive operating system, program, user and application interface and electronic equipment 8.Processor 16 can comprise the particular combinations of one or more microprocessors (for example, one or more " general " microprocessor, one or more special microprocessor and/or ASICS) or this processing element.For example, processor 16 can comprise one or more reduced instruction set computers (RISC) processor, for example graphic process unit, video processor, audio process and/or related chip collection.

The instruction that will be handled by processor 16 or data can be stored in the computer-readable medium such as storer 18.Sort memory 18 can be set to such as the volatile memory of random-access memory (ram) and/or such as the nonvolatile memory of ROM (read-only memory) (ROM).Storer 18 can storing various information and be can be used for various uses.For example, storer 18 can be stored the firmware (for example, basic I/O instruction or operating system instruction) that is used for electronic equipment 8, various programs, application or the routine carried out, user interface capabilities, functional processor or the like on electronic equipment 8.In addition, storer 18 is used in 8 operating periods of electronic equipment and cushions or high-speed cache.

Parts can also comprise that other forms of computer-readable medium (for example, the non-volatile storage device 20) is in order to for good and all to store data and/or instruction.Non-volatile storage device 20 can comprise flash memory, hard drives or any other optics, magnetic and/or solid storage medium.Non-volatile storage device 20 can be used for storing firmware, data file, software, wireless connections information and any other suitable data.

Illustrative embodiment can also comprise one or more cards or expansion slot among Fig. 1.Draw-in groove can be configured to admit expansion card 22, and this expansion card 22 can be used for adding function, for example annex memory, I/O function or networked capabilities to electronic equipment 88.This expansion card 22 can be connected to equipment by the suitable connector of any kind, and can be in the inside of the shell of electronic equipment 8 or outside accessed.For example, in one embodiment, expansion card 22 can be a flash memory card, for example secure digital (SD) card, small-sized SD or miniature SD, compact flash, multimedia card (MMC) or the like.

Parts shown in Fig. 1 also comprise network devices 24, for example network controller or network interface unit (NIC).In one embodiment, network devices 24 can be the wireless NIC that wireless connections are provided by any 802.11 standards or any other suitable Wireless Networking standard.Network devices 24 can allow electronic equipment 8 to communicate by network (for example, Local Area Network, wide area network (WAN) or internet).In addition, electronic equipment 8 can be connected to any equipment on the network (for example, portable electric appts, personal computer, printer, or the like), and sends or receive data with it.Alternatively, in certain embodiments, electronic equipment 8 can not comprise network devices 24.In such an embodiment, can add NIC, so that similar aforesaid networked capabilities to be provided as expansion card 22.

In addition, parts can also comprise power supply 26.In one embodiment, power supply 26 can be one or more batteries, for example the suitable battery of lithium ion polymer battery or other types.Battery can be that the user is removable or can be fixed in the shell of electronic equipment 8, and can be rechargeable.In addition, AC power supplies (for example, the AC power supplies that is provided by supply socket) can be provided power supply 26, and electronic equipment 8 can be connected to power supply 26 by power supply adaptor.This power supply adaptor can also be used for one or more batteries (if any) are charged.

Consider above situation, Fig. 2 illustration take the electronic equipment 8 of the form of portable equipment 30 (being cellular phone) here.It should be noted that, although shown portable equipment 30 is to provide in the environment of cellular phone, but the portable equipment (for example, being used for the combination of media player, personal data organizer, handheld games platform and/or these equipment of playing back music and/or video) that also can suitably provide other types is as electronic equipment 8.In addition, suitable portable equipment 30 can and have the function of the equipment (for example, media player, cellular phone, gaming platform, personal data organizer, or the like) of one or more types.

For example, in shown embodiment, portable equipment 30 is taked the form of cellular phone, and it can provide various additional functions (for example, pictures taken, record audio and/or video, the ability of listening to the music, playing games or the like).As what discuss about the general electronic equipment of Fig. 1, portable equipment 30 can allow the user to be connected to the internet or such as other networks of LAN (Local Area Network) or wide area network, and communicates by it.Hand-held electronic equipment 30 can also use short distance to connect (for example, bluetooth and near-field communication) and communicate with other equipment.For example, portable equipment 30 can be the iPod of a kind of model of obtaining of the APPLE company from the Cupertino that is positioned at the California

Or iPhone

In shown embodiment, portable equipment 30 comprises that the protection internal part is not subjected to physical damage and shields housing or the main body that internal part is not subjected to electromagnetic interference (EMI).Housing can be formed by any suitable material such as plastics, metal or compound substance, and the electromagnetic radiation that can allow characteristic frequency is by arriving the interior radio communication circuit of portable equipment 30, thereby is convenient to carry out radio communication.

In shown embodiment, housing comprises user's input structure 14, can carry out alternately with equipment by this user's input structure 14 users.Each user's input structure 14 can be configured to help the opertaing device function when activateding.For example, in cellular phone is implemented, one or more input structures 14 can be configured to call " homepage " picture or menu shows, switch between sleep and awakening mode, application makes that bell ringing device is quiet, increases or reduce volume output for cellular phone, or the like.

In shown embodiment, portable equipment 30 comprises the display 10 of taking LCD 32 forms.LCD 32 can be used for display graphics user interface (GUI) 34, and this graphic user interface 34 makes that the user can be mutual with portable equipment 30.GUI 34 can comprise various layers, window, picture, template or other graphic elements that can show on all or part of of LCD 32.In general, GUI 34 can comprise the application of representing electronic equipment and the graphic element of function.Graphic element can comprise icon 36 and represent other images of button, slider, menu bar etc.Icon 36 can be corresponding to the various application that can open when selecting this icon 36 of electronic equipment.In addition, the selection to icon 36 can cause the hierarchical navigation processing, the feasible picture that the selection of icon 36 is obtained comprising one or more the additional icons or other GUI elements.Icon 36 can be selected by the touch-screen that is included in the display 10, perhaps can be selected by another user's input mechanism 14 (for example, wheel or button).

Hand-held electronic equipment 30 can also comprise various input and output (I/O) port one 2 that allows portable equipment 30 to be connected to external unit.For example, an I/O port one 2 can be the port that allows data or order to transmit and receive between hand-held electronic equipment 30 and another electronic equipment such as computing machine.This I/O port one 2 can be any patent port that obtains from APPLE company, perhaps can be the port of any Open Standard I/O.

Except portable equipment 30 (for example, the cellular phone shown in Fig. 2), electronic equipment 8 can also be taked the form of the electronic equipment of computing machine or other types.This computing machine can comprise and (for example generally is of portable form computing machine, laptop computer, notebook and image input unit type computing machine), and the computing machine that usually uses (for example, common desk-top computer, workstation and/or server) a position.In a particular embodiment, taking the electronic equipment 8 of form of computers can be the MacBook of a kind of model of obtaining from APPLE company

, MacBook

Pro, MacBook Air

, iMac

, Mac

Mini or Mac Pro

For example, in Fig. 3 illustration take the electronic equipment 8 of laptop computer 50 forms according to an embodiment of the invention.Shown computing machine 50 comprises shell 52, display 10 (for example, shown LCD 32), input structure 14 and input/output end port 12.

In one embodiment, input structure 14 (for example, keyboard and/or touch pad) can be used for computing machine 50 mutual, for example opens, controls or operate in the GUI or the application of operation on the computing machine 50.For example, keyboard and/or touch pad can allow user interface or the application interface that the user navigates and shows on LCD 32.

Go out as shown, take the electronic equipment 8 of computing machine 50 forms can also comprise that various input and output ports 12 are to allow to be connected to other equipment.For example, computing machine 50 can comprise the I/O port one 2 (for example, USB port or other ports) that is suitable for being connected to another electronic equipment, projector, secondary monitor etc.In addition, as described about Fig. 1, computing machine 50 can comprise the performance of network connection, storer and storage facility.Therefore, GUI and other application can be stored and carry out to computing machine 50.

Consider above discussion, should be appreciated that and take the electronic equipment 8 of portable equipment 30 or computing machine 50 forms can be provided with LCD 32 as display 10.This LCD 32 can be used to be presented on the electronic equipment 8 the corresponding operating system and the application interface of operation, and/or the demonstration data, image or other the visual output that are associated with the operation of electronic equipment 8.

Comprise among the embodiment of LCD 32 that at electronic equipment 8 LCD 32 can comprise the array or the matrix of pictorial element (that is pixel).In operation, LCD 32 be operating as usually by control setting the liquid crystal at each pixel place towards the transmissivity of coming light modulated by pixel.In general, by change the electric field be associated with each corresponding pixel control liquid crystal towards, wherein liquid crystal any given moment by the attribute (intensity, shape etc.) of electric field definite towards.

Dissimilar LCD can take different technology to control these electric fields and/or liquid crystal.For example, specific LCD adopts lateral electric field mode, wherein comes directional crystal by apply the face internal electric field to liquid crystal layer.The example of this technology comprises switching (IPS) and fringing field switching (FFS) technology in the face, and these technology are in difference aspect the electrode configuration that generates corresponding electric field.

Although to the liquid crystal in this display towards control may be enough to modulate the light quantity of sending by pixel, color filter can also be associated with pixel, thereby allow each pixel to send the light of particular color.For example, be among the embodiment of color monitor at LCD 32, each pixel in one group of pixel can be corresponding to different primary colors.For example, in one embodiment, one group of pixel can comprise red pixel, green pixel and blue pixel, and each pixel all is associated with the wave filter of appropriate color.(by the modulation corresponding liquid crystal) allows to have determined to watch the color of user's perception of display by the light intensity of each pixel and with the combination of the light that sends from other neighbors.Because being each color component (for example, red, green and blue) that is provided by colour element, visible color forms, so also colour element can be called unit picture element.

Below with reference to Fig. 4, provided the example of the circuit diagram of the pixel-driving circuit of in LCD32, finding.As shown, pixel 56 can be arranged in the array 58, and array 58 has formed the image display area of LCD 32.In this matrix, each pixel 56 can be assigned to limit by the cross-shaped portion of data line 60 and scanning or select lines 62.

As will be appreciated, each pixel 56 comprises the visit device, for example thin film transistor (TFT) (TFT).In shown embodiment, each TFT of pixel 56 can be connected to the data line 60 that extends from corresponding data line drive circuit 64.Similarly, in shown embodiment, the grid of each TFT of pixel is electrically connected to scanning or the select lines 62 that extends from corresponding scan line drive circuit 66.

In one embodiment, data line drive circuit 64 sends signal by corresponding data line 60 to pixel.As described below, this picture signal can apply by various technology.The sweep trace 62 in the future sweep signal of self-scanning line drive circuit 66 is applied to the grid of each TFT of the pixel 56 that this sweep trace 62 is connected to.This sweep signal can apply according to the various sequences with predetermined timing and/or according to the pulsation form.

The picture signal that is stored in the pixel electrode place can be used for generating electric field between this pixel electrode and public electrode.The liquid crystal of this electric field in can the orientation liquid crystal layer, thus modulation is by the transmittance of liquid crystal layer.In certain embodiments, holding capacitor can be parallel to the liquid crystal capacitor setting that is formed between pixel electrode and the public electrode, thereby prevents that the picture signal of being stored from leaking at the pixel electrode place.

Fig. 5 is the cross sectional side view that is orientated the LCD pixel of the liquid crystal molecule of forbidding that light passes through according to having of the embodiment of the invention.The view of the pixel 56 among Fig. 5 comprises polarization layer 68, following polarization layer 70, infrabasal plate 72, TFT layer 74, liquid crystal layer 76, both

alignment layers

78 and 80, color filter 82 and upper substrate 84.The embodiment that should be appreciated that LCD 32 can comprise some or all layers shown in Figure 5, perhaps can comprise any additional layer.

TFT layer 74 can comprise the electron device that defines the operation that is used to drive pixel 56 and the various conductions of passage, non-conductive and/or semiconductor layer and structure.In illustrated embodiment, TFT layer 74 is shown under the environment that switches (IPS) LCD display device in the face, and comprises pixel electrode 86 and public electrode 88.

Pixel electrode 86 and public electrode 88 can be by making such as the transparent conductive material of ITO or IZO.Public electrode 88 is usually across pixel 56, and can be connected to the concentric line (not shown), and this concentric line is couple to below common electrode drive device in greater detail.Towards following, liquid crystal molecule 90 is configured to forbid that light passes through LCD 32 default.Specifically, in the present embodiment, the polarization axle of following polarization layer 70 can be orientated with respect to 68 one-tenth approximate 90 degree of last polarization layer.As will be appreciated, when light passed through Polarization filter, light became along the polarization axle polarization of wave filter.In other words, wave filter stops that the light with any other polarization axle except that the polarization axle of wave filter passes through.Therefore, can become along the polarization axle polarization of following polarization layer 70 by the light that descends polarization layer 70.If each liquid crystal molecule 90 all along the axle substantially the same with following polarization layer 70 towards, light can keep its polarization axle by liquid crystal layer 76 time so.Therefore, when light incided polarization layer 68, the polarization axle of polarisation of light axle and last polarization layer 68 departed from approximate 90 degree.

As previously discussed, Polarization filter stops that the light that polarization axle departs from the polarization axle of wave filter passes through.Therefore, because light is polarized for the polarization axle with respect to last polarization layer 68 becomes 90 degree, so there is not light to pass through last polarization layer 68 basically.Therefore, liquid crystal molecule 90 is default towards forbidding that basically light passes through LCD 32.

As illustrated among Fig. 5, liquid crystal molecule 90 can be orientated is convenient to light by LCD 32.Specifically, when driving voltage is applied to public electrode 88, between pixel electrode 86 and public electrode 88, form electric field.As discussed above, electric field (representing with drawing reference numeral E here) be controlled at liquid crystal molecule 90 in the liquid crystal layer 76 towards, make towards about default towards and change, thereby allow at least a portion transmission of the light that transmits from light source to pass through LCD32.Therefore, by modulated electric fields E, can control that light source provides and see through the light of LCD 32.In this manner, the user that the view data that sends along data line 60 and sweep trace 62 can viewed LCD 32 is perceived as image.

In this configuration, LCD 32 is convenient to light and is passed through when electric field E activates, and forbids that light passes through when electric field E deactivation.As will be appreciated, can take in other embodiments to select else towards

polarization layer

68 and 70 and the liquid crystal molecule 90 of alternate configuration.In addition, electric field E can be so that liquid crystal molecule 90 rotates around any axle (for example, x axle and/or y axle) in customized configuration.

In a particular embodiment, can provide the public electrode of separation to the pixel of various configurations, for example multi-thread (for example, OK) pixel can be shared a public electrode.A this embodiment can comprise one group of odd number line that is connected to first public electrode and the one group of even number line that is connected to second public electrode, and making has two public electrodes that are connected to common electric voltage (being also referred to as " Vcom of separation ").Fig. 6 shows the synoptic diagram of the embodiment of the LCD array 92 with M bar line, and wherein odd number line (for example,

line

1,3,5 etc.) is couple to public electrode 94, and the even number line is couple to public electrode 96.In the

public electrode

94 and 96 each is shown as and is couple to high common electric voltage (VCOMH) and low common electric voltage (VCOML).As described above, in the IPS panel,

public electrode

94 and 96 can be positioned at same plane, for example, and in same glass or on it.

In such an embodiment, because the line that pursues of frame counter-rotating refreshes, the frame counter-rotating of whole array 92 may cause visual artefacts.For example, typical frame reverses polarity that every frame switches two public electrodes once.The line of array 92 (and pixel) keeps an electromotive force at the duration of frame.Typical case for array refreshes (for example, 60Hz (16.7ms)), and when scanning the line of (refreshing) array from line 1 to line M shown in arrow 98, the frame counter-rotating remains on two public electrodes under the polarity.Yet scanning is when the top line of array 92 moves to the bottom line of array 92 during refreshing, and this frame refreshes may cause visible brightness gradient or other visual artefacts.This gradient is known as luminance deviation.

Fig. 7 A and 7B show the staggered 2 lines counter-rotating that is applied to array 92 according to the embodiment of the invention.Staggered 2 lines counter-rotating of describing among Fig. 7 A and the 7B and the counter-rotating of described 1 line and N line reverse can be by to the drive circuit reprogramming of LCD panel and/or reconfigure and realize.Therefore, these technology can need not redesign or be applied to the LCD panel with adding hardware component.In other embodiments, can completely or partially support the enforcement of staggered counter-rotating discussed herein by the additional of LCD panel driver or improvement hardware.Some embodiment can comprise the instruction (for example, code) that is stored in the inversion technique of being discussed on the tangible machine readable media below realizing.

As described below, the counter-rotating of 2 lines is switched at each polarity and is refreshed 2 lines, for example, an even lines is switched to identical polarity with an odd lines, makes per 2 line ground in single frame (rather than frame as described above counter-rotating in frame by frame) switch polarity.Therefore, during the 2 lines counter-rotating that separates public electrode array 92, switch the polarity of public electrode with the speed of the product of half and the refresh rate that equal the line number.For example, for the refresh rate of 320 linear arrays and 60Hz, above-mentioned frame refreshes the polarity that every frame switches public electrode (for example, refreshing at 60Hz is every 16.7ms).Yet for the counter-rotating of 2 lines, in order to keep the refresh rate of 60Hz, each " 2 line " in reversing at 2 lines single image duration is to switch polarity.Therefore,, in a frame, the polarity of public electrode switched and equal the number of times that 60 (refresh rates) multiply by 160 (half of line number) (in this example 320 linear arrays half) for 160 2 lines.Above example can be applied to the array that has any amount of line and operate under any refresh rate.

Fig. 7 A and 7B show the polarity that refreshes two frames in the array 92, and wherein Fig. 7 A shows the polarity at the line of first frame in the array 92, and Fig. 7 B shows the polarity of the line of second frame.As mentioned above and go out as shown in Figure 7A and 7B, the odd number line is couple to odd number line public electrode 94, and the even number line is couple to even number line public electrode 96.

In first image duration, every line of each 2 line centering of array 92 can have identical polarity.Therefore,

line

1 and 2 can have positive polarity, and

line

3 and 4 can have negative polarity, and the rest may be inferred, goes out as shown in Figure 7A.During refreshing, to switch polarity, scan whole array 92 at each 2 line thus, it is right (to have refreshed) each 2 line up to switching, shown in arrow 100 to 106.For example, as shown in fig. 7bly go out, first 2 line counter-rotating 100 can be so that switch to negative polarity with

line

1 and 2 from positive polarity.After first 2 line counter-rotating, 2 lines can be switched to positive polarity from negative polarity to (for example,

line

3 and 4).In this manner, the right polarity of each 2 line is inverted along array 92, (has refreshed) whole array up to counter-rotating.

As will be appreciated, refresh (wherein, at each frame switch polarity once) with frame and compare, the switching frequency that increases common electric voltage to refresh the power consumption that the right polarity of each 2 line of switching can increase array 92 at 60Hz.Fig. 8 A and 8B show the signal graph according to the staggered 2 lines counter-rotating with high impedance power reduction technology of the embodiment of the invention.As below discussing, public electrode at the offset line of each 2 lines counter-rotating described above can be switched to the third state (promptly, high impedance (Hi-Z) state), to reduce or to eliminate from public electrode and be used for the electric current that the respective drivers of offset line (offset line) is drawn, reduce the overall power of 2 lines counter-rotating thus and draw.This power reduces can compensate owing to switching frequency increases the power that causes and increases.Therefore, during the counter-rotating of 2 lines,

public electrode

94 and 96 can switch between low common electric voltage, high common electric voltage and high impedance status.

Fig. 8 A and 8B show following signal: the public electrode voltages signal (COMMON ODD) that grid is selected signal, demultiplexing control signal (at red (R), green (G) and blueness (B) data-signal), source amplifier voltage signal (at data line), public (logic) aanalogvoltage, data line R, data line G and data line B, is used for the public electrode voltages signal (COMMON EVEN) of even number line and is used for the odd number line.Fig. 8 A and 8B show respectively at first frame during the image refreshing of " worst condition " and second frame, wherein image be have alternately white (W) line and black (Bl) line to the middle gray image of (as illustrated in the W and Bl part of the signal shown in Fig. 8 A and 8B), this causes maximum power consumption.Fig. 8 A and 8B show the part of signal of the counter-rotating of line n-2 to n+3, and wherein every line is movable, select signal represented as " height " grid that provides at grid G n-2, Gn-1, Gn, Gn+1, Gn+2 and Gn+3.

To discuss below the one 2 line that in Fig. 8 A and 8B, highlights to the 110 and the 22 line that reverses to reversing 112.From line n-2 (the W line of odd number), provide high grid to select signal to be couple to the transistor of this line with conducting.The public electrode of even number line can be driven to low common electric voltage (as shown by the COMMON EVEN at VCOML place), thereby maximum voltage difference (making the pixel of this line allow whole light to pass through) is arranged between data line and public electrode.RGB data line (data line R, data line G and data line B) is switched to suitable voltage so that white pixel to be provided.Each switching to the RGB data line is reflected by the signal peak 114 shown in the COMMON EVEN signal.

() Current draw for example, the odd number line in the 2 lines counter-rotatings, the public electrode of odd number line can switch to high impedance (Hi-Z) state, thereby reduces or eliminate any electric current that the common electrode drive device by the odd number line draws in order to reduce offset line.As shown in Fig. 8 A, the common electrode signal of odd number line (COMMON ODD) does not comprise any peak value or trough at the RGB data line between transfer period, and this is because the electric current that high impedance causes the common electrode drive device by the odd number line to draw is minimum or do not have.Therefore, Fig. 8 A is depicted as dotted portion Hi-Z with the counterpart of COMMON ODD signal.

Turn to second line (line n-1) of 2 lines counter-rotating 110, second line (that is odd number line) that 2 lines are reversed flushes to black (Bl).Public (logic) voltage remains low, because its per 2 line in the counter-rotating of 2 lines switches.The public electrode of odd number line is driven to from high impedance (Hi-Z) state and switches to low common electric voltage (VCOML), shown in COMMON ODD signal.Because the even number line during the counter-rotating of this 2 line is switched is " free time " and be refreshed, so the public electrode of this even number line is switched to high impedance (Hi-Z) state, as shown by the dotted line Hi-Z part of COMMON EVEN signal.Once more, each switching of RGB data line causes the Current draw on the current odd number line that refreshes, as by shown in the trough 116 in the COMMON ODD signal.Comparatively speaking, the high impedance status of the public electrode of even number line reduces or eliminates because any Current draw that the voltage difference between RGB data line and the even number line public electrode may cause.

Turn to next 2 lines counter-rotating 112 now, public (logic) voltage signal is switched to high voltage from low-voltage.Line n is black (Bl) even number line, and is that height activates by shown in the Gn part of being selected signal by grid grid being selected driven.The public electrode of even number line is switched to as by the high common electric voltage (VCOMH) shown in the COMMON EVEN signal, thereby makes the voltage difference minimum to obtain black (Bl) line.At biasing or " free time " line of 2 lines counter-rotatings, the public electrode of odd number line is switched to high impedance (Hi-Z) state, as by shown in the dotted line Hi-Z part of COMMON ODD signal.

Second line (n+1) of 2 lines counter-rotating 112 is white (W) odd number lines.In order to generate white pixel, the public electrode of odd number line is switched to high common electric voltage, as by shown in the COMMONODD signal, thereby obtains voltage difference.Comparatively speaking, the public electrode of even number line is switched to high impedance (Hi-Z) state.Once more, this high impedance status minimizes or reduces any electric current that the common electrode drive device by the even number line draws from data line.In this manner, by during 2 lines counter-rotatings, the electrode of each offset line being switched to high impedance (Hi-Z) state between low common electric voltage and the high common electric voltage, the driver of the offset line of 2 lines counter-rotating can not draw electric current, thereby the overall power that reduces the counter-rotating of 2 lines is used.

Next frame is shown in Fig. 8 B, and shows to previous description with in the switching of the polarity of the line shown in Fig. 8 A.Seen at Fig. 8 B, next frame comprises identical handoff technique at even number line public electrode with odd number line public electrode, thereby adopts the polarity of reversing with first frame.Thus, COMMON EVEN and COMMON ODD signal replace between high common electric voltage, low common electric voltage and high impedance (Hi-Z) state.

In certain embodiments, another inversion technique can comprise the staggered counter-rotating of 1 line, shown in the signal graph shown in Fig. 9 A and 9B.The staggered counter-rotating of 1 line can be adopted the low power of comparing with the frame counter-rotating, may more be unsuitable for reducing luminance deviation but compare with the staggered counter-rotating of 2 lines.

Fig. 9 A shows respectively at aforesaid staggered first frame that reverses of 1 line of public electrode LCD array 92 and the signal graph of second frame of separating with 9B.Once more, Fig. 9 A and 9B show " worst condition ", and wherein image is the white image with white (W) line, and this causes the maximum power dissipation at staggered 1 line counter-rotating.Fig. 9 A and 9B show following signal: the public electrode voltages signal (COMMON ODD) that grid is selected signal, demultiplexing control signal (at red (R), green (G) and blueness (B) data-signal), source amplifier voltage signal (at data line), public (logic) aanalogvoltage, data line R, data line G and data line B, is used for the public electrode voltages signal (COMMON EVEN) of even number line and is used for the odd number line.

As shown in Fig. 9 A and the 9B, per 1 line of public (logic) voltage switches, because at every line of image duration counter-rotating.Replace each public electrode (corresponding to COMMONODD and COMMON EVEN signal) between low common electric voltage, high impedance and high common electric voltage, to switch, each public electrode only switches between high or low common electric voltage and high impedance, and this is because do not have corresponding biasing or " free time " line during staggered 1 line counter-rotating.For example, as shown in Fig. 9 A, between low common electric voltage and high impedance status, switch at 1 line counter-rotating 120 and 122 even number line public electrodes (COMMON EVEN signal).Odd number line public electrode (COMMON ODD signal) switches between high common electric voltage and high impedance status.As mentioned above, public (logic) voltage switches at every line; Thus, each public electrode (COMMON EVEN or COMMON ODD) only is driven to high common electric voltage or low common electric voltage, to obtain white (W) pixel at this line (in conjunction with the RGB data line).As mentioned above, by during odd number line counter-rotating, the public electrode of even number line being switched to high impedance status, can reduce or eliminate any electric current that the common electrode drive device by the even number line is drawn.Similarly, by during even number line counter-rotating, the public electrode of odd number line being switched to high impedance status, can reduce or eliminate any electric current that the common electrode drive device by the odd number line draws.

Fig. 9 B shows the next frame during the counter-rotating of 1 line.Seen at Fig. 9 B, the public electrode of even number line (COMMON EVEN) switches between the high common electric voltage opposite polarity polarity of the line of first frame (be used for obtaining and) and high impedance (Hi-Z) state.Similarly, the public electrode of odd number line (COMMON ODD) switches between low common electric voltage (in order to the opposite polarity polarity of the line in the acquisition and first frame) and high impedance (Hi-Z) state.

Figure 10 shows the embodiment that can realize the drive circuit 130 that high impedance power reduces during the counter-rotating of aforesaid 1 line or the counter-rotating of 2 lines or staggered N line counter-rotating as described below.As below will be in greater detail, in such an embodiment, can realize that high impedance power reduces by with the action reprogramming of the various switches of drive circuit 130 and/or reconfigure driver is switched to the 3rd high impedance status.In other embodiments, for example can adopt any switching device that can enable high impedance status by programming or configuration switching device.Some embodiment can comprise the instruction (for example, code) that is stored on the tangible machine readable media in order to the switching that realizes discussing below.

As shown in Figure 10, drive circuit 130 comprises drive circuit 132 that is used for even number line public electrode and the drive circuit 134 that is used for odd number line public electrode.The common electrode drive device 134 of odd number line can comprise the odd number wiregrating driver 136 of the transistor 138 of the pixel that is used for driving (switching) odd number line.Similarly, the common electrode drive device 132 of even number line can comprise the even number wiregrating driver 140 of the transistor 142 of the pixel that is used for driving (switching) even number line.Each

gate drivers

140 and 136 can be couple to high grid voltage (VGH) and low grid voltage (LGH).The RGB data-signal is provided by demodulation multiplexer 142, and demodulation multiplexer 142 will be demultiplexed into each RGB data line 144 (as above illustrated in the signal graph of Fig. 8 and Fig. 9) from the output of data line.

For public electrode being provided aforesaid switching, common electrode drive device 132 and 134 can switchably be couple to low common electric voltage (VCOML) and high common electric voltage (VCOMH).As shown in Figure 10, the driver 132 that is used for the even number line is couple to VCOML and VCOMH by line 146 and switch 148.Similarly, the driver 134 that is used for the odd number line can be couple to VCOML and VCOMH by line 150 and switch 152.Thus, for the public electrode at the even number line switches between VCOML and VCOMH, switch 148 can switch between VCOML and VCOMH.For the public electrode at the odd number line switches between VCOML and VCOMH, switch 152 can switch between VCOML and VCOMH.In one embodiment,

switch

148 and 152 can be nmos pass transistor, PMOS transistor or their combination in any.

As discussed above and go out as shown in Figure 10, switch to high impedance status by common electrode drive device 134 with the odd number line, can reduce the power consumption during the counter-rotating of even number line.Configuration shown in Figure 10 is corresponding to black (Bl) line in the counter-rotating of 2 lines shown in Fig. 8 A 112.In order to obtain high impedance status, the switch 152 that the public electrode of odd number line is couple to low common electric voltage and high common electric voltage can be switched to the third state, as shown in Figure 10.Switch 152 can be switched to the third state, makes switch be free of attachment to low common electric voltage or high common electric voltage (being also referred to as " floating " driver 134, because it is not couple to any voltage source).In this manner, the high impedance of the common electrode drive device 134 of odd number line causes not having electric current to flow through capacitor C10, thereby reduces or eliminate the Current draw of driver 134.The common electrode drive device 132 that is used for the even number line is couple to low common electric voltage (VCOML) by switch 148, thereby the common electrode drive of even number line is arrived VCOML.Potential difference (Vd) between data line and the public electrode wire 146 causes electric current to flow through capacitor C12.

Figure 11 shows the figure of the drive circuit 130 during the odd number line counter-rotating of aforesaid 2 lines counter-rotating 112.Figure 11 is corresponding to black (Bl) line shown in 112 that reverses at staggered 2 lines shown in Fig. 9 A.As shown in, in Figure 11, the drive circuit 134 that is used for the odd number line is couple to VCOML by switch 152, thus with the common electrode drive of odd number line to VCOML.Comparatively speaking, the switch 148 of the common electrode drive device 132 of even number line is switched to the third state, thereby the common electrode drive device 132 of even number line is disconnected (that is the common electrode drive device 132 of the even number line of, floating) from low common electric voltage and high common electric voltage.Thus, the common electrode drive device of even number line is switched to high impedance (Hi-Z) state.Data line and the voltage difference (Vd) that is used between the public electrode wire 150 of driver 134 of odd number line cause electric current to flow through capacitor C10.Comparatively speaking, the public electrode wire 146 that is used for even number line drive 132 is set to high impedance status, does not have Current draw thereby cause striding capacitor C12.

Any amount N the public electrode that logic is different that may have in other embodiments, the line of the pel array that is couple to LCD 32.Figure 12 is the synoptic diagram that has the pel array 160 of M bar line and N=4 public electrode according to another embodiment of the present invention.As shown in Figure 12, there be N=4 public electrode 162,164,166 and 168.Each public electrode can be couple to M/N bar line.For example, for the pel array with M=320 bar line and N=4 public electrode, each public electrode can be couple to 320/4 (M/N)=80 line.In such an embodiment, each public electrode is couple to per the 4th line.Thus, as shown in figure 12, public electrode 162 is couple to

line

1,5 etc.Public electrode 164 is couple to

line

2,6 etc., and public electrode 166 is couple to

line

3,7 etc., and the rest may be inferred.The increase of N (increase of the public electrode of logical separation) can be reduced in the power consumption during the above-mentioned line inversion technique, more effectively reduces the visual artefacts such as luminance deviation simultaneously.

Figure 13 shows the signal graph of staggered according to another embodiment of the present invention N line counter-rotating.Among the illustrated embodiment with N logical separation electrode, staggered counter-rotating can separate by N bar line in such as above Figure 12.Thus, public (logic) voltage switches with N line frequency.For example, more than the embodiment that in Fig. 8, discussed show the staggered counter-rotating of 2 lines, wherein per 2 (N=2) bar line ground switching public (logic) voltage during refreshing multiply by M/2 (M/N) thereby switching frequency equals refresh rate.As shown in Figure 13, at any given N public electrode, the frequency switching that public (logic) voltage multiply by (M/N) to equal refresh rate.As will be appreciated, at every " free time " line during staggered N line counter-rotating, corresponding N public electrode and driver can be switched to high impedance (Hi-Z) state.For example, as shown in Figure 13, counter-rotating at the line that is couple to first public electrode, first public electrode (COMMON 1 signal) can be switched to low common electric voltage, and second public electrode (COMMON 2 signals) can be switched to high impedance (Hi-Z) state, because these lines that are couple to second public electrode are " free time " during the line that is couple to first public electrode is reversed.In addition, as by shown in the COMMON n-signal, additional public electrode (up to by the public electrode N shown in the COMMON n-signal) can be switched to high impedance (Hi-Z).

In having other embodiment of N logical separation public electrode, the line in the array can be coupled to the separation public electrode by the group of L bar line.Figure 14 is the synoptic diagram that has the pel array 170 of the group that M bar line, N=2 separate public electrode and L=4 bar line according to another embodiment of the present invention.As shown in Figure 14, among public electrode 172,174,176,178,180,182 of N=2 or the like, divide individual group of M/L (M/4).For example, first group can be included in the line of dividing between 2 public electrodes 172 and 174 1,2,3 and 4.Second group can be included in line 5,6,7 and 8, the three groups of lines 9,10,11 and 12 that can be included in division between 2 public electrodes 180 and 182 of dividing between 2 public electrodes 176 and 178, and the rest may be inferred.In such an embodiment, can be along reading scan direction (shown in arrow 184) to separating the public electrode grouping.In case finished reading scan, sweep trace just can remain on aforesaid high impedance (Hi-Z) state to reduce power consumption.Thus, when scan period " by " one group the time, the common electrode drive device that is used for this group can be switched to high impedance (Hi-Z) state.This embodiment can use L to multiply by 2 route lines (L * 2) between array and driver.Number that can the selection group (that is, the line in a group is counted L) is to obtain the balance of the expectation between the power consumption of the number of route line and expectation.

In another embodiment, every line in the array can be couple to single electrode, makes the group number equal the line number of pel array.Figure 15 show have L=1, the embodiment of the pel array 180 of M group and N=2 logical separation electrode.Every line shown in Figure 15 can be couple to a public electrode.Thus, line 1 (for example, having first group of L=1 bar line) is couple to public electrode 182, and line 2 (for example, having second group of 1 line) is couple to public electrode 184, and line 3 (for example, the 3rd group) is couple to public electrode 186, and the rest may be inferred.

Figure 16 shows the circuit diagram of the drive circuit 190 that is used for above pel array 180 described in Figure 15 according to another embodiment of the present invention.Go out as shown in Figure 16, drive circuit 190 can comprise the common electrode drive device 192 that switchably is couple to low common electric voltage (VCOML) and high common electric voltage (VCOMH) by switch 194 and 196.As mentioned above, these switches are by disconnecting with VCOML and VCOMH and the driver of floating makes it possible to public electrode is switched to high impedance status.In addition, in certain embodiments, drive circuit 190 can comprise cmos buffer device 198 and 200.

Cmos buffer device

198 and 200 can switch between the high rail of the driver that is couple to VCOML and VCOMH respectively and low rail.In addition, cmos buffer device 200 can comprise high impedance status, makes to switch to the Current draw that high impedance status can not cause striding capacitor Cb, and reduces the power consumption of additional buffer 198 and 200.For example, go out as shown in Figure 16, cmos buffer device 200 can be switched to high impedance status during being couple to the line of driver " free time ".

Should be appreciated that any or all technology discussed above can be combined with other power conservation techniques such as cycle charging.In addition, any line counter-rotating or separation public electrode embodiment can select according to combination in any, thereby provide the compromise of expectation between minimizing visual artefacts and power consumption reduction.In addition, inversion technique described above, electrode configuration and high impedance power reduce and can implement in any suitable LCD panel type (for example, IPS, FFS, TN, VA etc.).

According to disclosure first aspect, a kind of inverting method that is used for panel of LCD is provided, be included in frame refresh during each the continuous two lines right polarity of counter-rotating in the panel of LCD, wherein said inversion step comprises: first line of the described two line centerings of panel of LCD is driven into first common electric voltage; Second line with described two line centerings during described driving switches to high impedance status; Described second line of described two line centerings is driven into second common electric voltage; And described first line of described two line centerings switched to high impedance status.

According to an embodiment of disclosure first aspect, described second line of described two line centerings is switched to high impedance status comprise: will be couple to described second-line public electrode and switch to described high impedance status.According to another embodiment of disclosure first aspect, described public electrode is switched to described high impedance status reduce or eliminated described public electrode and be used to drive the Current draw of the driver of described public electrode.

Another embodiment according to disclosure first aspect, each continuous right polarity of two lines of reversing comprises: come each in a plurality of public electrodes of switching liquid crystal display panel with following speed, half of number of buses that this speed equals panel of LCD multiply by the refresh rate that frame refreshes.

According to second aspect of the present disclosure, a kind of inverting method that is used for panel of LCD is provided, be included in the polarity of each continuous lines of the panel of LCD that reverses during frame refreshes, wherein, described continuous lines comprises even number line and odd number line, and wherein said counter-rotating comprises: be driven into first common electric voltage with one in the even number line of described panel of LCD; And during described driving, the odd number line of described panel of LCD is switched to high impedance status.

According to an embodiment of disclosure second aspect, described inverting method comprises: be driven into second common electric voltage with one in the odd number line of described panel of LCD; And during described driving, the even number line of described panel of LCD is switched to high impedance status.According to another embodiment of disclosure second aspect, wherein, described first common electric voltage comprises the high common electric voltage greater than described second common electric voltage.Another embodiment according to disclosure second aspect, described inverting method is included in the polarity of each continuous lines of the described panel of LCD that reverses second image duration that frame refreshes, and wherein said counter-rotating comprises: be driven into described second common electric voltage with one in the even number line of described panel of LCD; And during described driving, the odd number line of described panel of LCD is switched to high impedance status.

According to the third aspect of the present disclosure, a kind of panel of LCD is provided, comprise: first electrode driver, this first electrode driver is couple to one or more common logic electrodes, wherein, this first electrode driver is configured to switch to high impedance status during one or more line to described panel of LCD reverses; And one or more groups line that is couple to described one or more logic public electrodes, wherein, the number of buses that the line number of each group in described one or more groups line comprises described panel of LCD is divided by one or more groups quantity.

According to an embodiment of the disclosure third aspect, described each group comprises the single line of described panel of LCD.According to another embodiment of the disclosure third aspect, described each group is couple to a logic public electrode.

According to the another embodiment of the disclosure third aspect, described each group comprises four lines of described panel of LCD.According to an also embodiment of the disclosure third aspect, described each group is couple to two logic public electrodes.

According to disclosure fourth aspect, a kind of changing method that is used for panel of LCD is provided, be included in frame refresh during the polarity of switching liquid crystal display panel, wherein said switching comprises: the polarity of switching first group of line of described panel of LCD; And between the polarity epoch of the described first group of line of described switching, second group of line of described panel of LCD switched to high impedance status.

According to an embodiment of disclosure fourth aspect, switch described first group of line and comprise: one or more logic common electrode drive that will be couple to described first group of line are to first common electric voltage.

According to another embodiment of disclosure fourth aspect, described changing method comprises the polarity of switching described second group of line.According to the another embodiment of disclosure fourth aspect, the polarity that described changing method is included in described second group of line switches to high impedance status with described first group of line of described panel of LCD between transfer period.

According to the disclosure the 5th aspect, a kind of method of operating panel of LCD is provided, comprise: the first common electrode drive device of drive circuit is switched to first common electric voltage, wherein, the described first common electrode drive device is couple to the one one or more lines of described panel of LCD; And the second common electrode drive device of the drive circuit of floating, wherein, the described second common electrode drive device is couple to the two one or more lines of described panel of LCD.

According to an embodiment of the disclosure the 5th aspect, the second common electrode drive device of floating comprises: with the described second common electrode drive device and described first common electric voltage and the disconnection of second common electric voltage.Another embodiment according to the disclosure the 5th aspect, disconnecting the described second common electrode drive device comprises: the switch that will be couple to the described second common electrode drive device switches to intermediateness, makes described switch and described first common electric voltage and the described second common electrical piezoelectricity disconnect.

According to the disclosure the 6th aspect, a kind of inversion apparatus that is used for panel of LCD is provided, comprise the device of the polarity that each continuous two line of being used for during frame refreshes the counter-rotating panel of LCD are right, it comprises: the device that is used for first line of the described two line centerings of panel of LCD is driven into first common electric voltage; Be used for during described driving, second line of described two line centerings being switched to the device of high impedance status; Be used for described second line of described two line centerings is driven into the device of second common electric voltage; And the device that is used for described first line of described two line centerings is switched to high impedance status.

According to an embodiment of the disclosure the 6th aspect, the device that described described second line that is used for described two line centerings switches to high impedance status comprises: be used for and will be couple to the device that described second-line public electrode switches to described high impedance status.According to another embodiment of the disclosure the 6th aspect, describedly be used for the device that described public electrode switches to described high impedance status reduced or eliminated described public electrode and be used to drive the Current draw of the driver of described public electrode.

Another embodiment according to the disclosure the 6th aspect, the device of the described right polarity of each two continuous line that is used for reversing comprises: be used for coming with following speed each device of a plurality of public electrodes of switching liquid crystal display panel, half of number of buses that this speed equals panel of LCD multiply by the refresh rate that frame refreshes.

According to the disclosure the 7th aspect, a kind of inversion apparatus that is used for panel of LCD is provided, comprise the device that is used for the polarity of each continuous lines of counter-rotating panel of LCD during frame refreshes, wherein, described continuous lines comprises even number line and odd number line, and it comprises: be used for a device that is driven into first common electric voltage with the even number line of described panel of LCD; And the device that is used for during described driving, the odd number line of described panel of LCD being switched to high impedance status.

According to an embodiment of the disclosure the 7th aspect, described inversion apparatus also comprises a device that is driven into second common electric voltage that is used for the odd number line of described panel of LCD; And the device that is used for during described driving, the even number line of described panel of LCD being switched to high impedance status.According to another embodiment of the disclosure the 7th aspect, described first common electric voltage comprises the high common electric voltage greater than described second common electric voltage.Another embodiment according to the disclosure the 7th aspect, described inversion apparatus comprises: the device of polarity of each continuous lines of described panel of LCD of being used for reversing in second image duration that frame refreshes, and it comprises: be used for a device that is driven into described second common electric voltage with the even number line of described panel of LCD; And the device that is used for during described driving, the odd number line of described panel of LCD being switched to high impedance status.

According to disclosure eight aspect, a kind of switching device that is used for panel of LCD is provided, comprise the device that is used for the polarity of switching liquid crystal display panel during frame refreshes, it comprises: the device of polarity that is used to switch first group of line of described panel of LCD; And be used between the polarity epoch of the described first group of line of described switching, second group of line of described panel of LCD switched to the device of high impedance status.

According to an embodiment of disclosure eight aspect, the device of the polarity of the described first group of line that is used to switch described panel of LCD comprises: be used for and will be couple to the device of one or more logic common electrode drive of described first group of line to first common electric voltage.

According to another embodiment of disclosure eight aspect, described switching device comprises the device of the polarity that is used to switch described second group of line.According to the another embodiment of disclosure eight aspect, described switching device comprises the device that is used for the polarity of described second group of line between transfer period being switched to described first group of line of described panel of LCD high impedance status.

According to the disclosure the 9th aspect, a kind of equipment of operating panel of LCD is provided, comprise: the device that is used for the first common electrode drive device of drive circuit is switched to first common electric voltage, wherein, the described first common electrode drive device is couple to the one one or more lines of described panel of LCD; And the device of the second common electrode drive device of the drive circuit that is used to float, wherein, the described second common electrode drive device is couple to the two one or more lines of described panel of LCD.

According to an embodiment of the disclosure the 9th aspect, the device of the second common electrode drive device of the described drive circuit that is used to float comprises: be used for device that the described second common electrode drive device and described first common electric voltage and second common electric voltage are disconnected.Another embodiment according to the disclosure the 9th aspect, described being used for comprises the device of the described second common electrode drive device and described first common electric voltage and the disconnection of second common electric voltage: the switch that is used for being couple to the described second common electrode drive device switches to intermediateness, the device that makes the disconnection of described switch and described first common electric voltage and the described second common electrical piezoelectricity.

Mode by example shows above-described specific embodiment, and is to be understood that these embodiment can take various modifications and alternate forms.It is also understood that claim is not to be intended to be limited to disclosed concrete form, but can cover all modifications, equivalent and the alternate forms that falls in the spirit and scope of the present disclosure.

Claims

1. inverting method that is used for panel of LCD comprises:

The right polarity of each continuous two line during frame refreshes in the counter-rotating panel of LCD, wherein said inversion step comprises:

First line of the described two line centerings of panel of LCD is driven into first common electric voltage;

Second line with described two line centerings during described driving switches to high impedance status;

Described second line of described two line centerings is driven into second common electric voltage; And

Described first line of described two line centerings is switched to high impedance status.

2. method according to claim 1 wherein, switches to high impedance status with described second line of described two line centerings and comprises: will be couple to described second-line public electrode and switch to described high impedance status.

3. method according to claim 2 wherein, switches to described high impedance status with described public electrode and reduces or eliminated described public electrode and be used to drive the Current draw of the driver of described public electrode.

4. method according to claim 1, wherein, each continuous right polarity of two lines of reversing comprises: come each in a plurality of public electrodes of switching liquid crystal display panel with following speed, half of number of buses that this speed equals panel of LCD multiply by the refresh rate that frame refreshes.

5. inverting method that is used for panel of LCD comprises:

The polarity of each continuous lines of counter-rotating panel of LCD during frame refreshes, wherein, described continuous lines comprises even number line and odd number line, wherein said counter-rotating comprises:

Be driven into first common electric voltage with one in the even number line of described panel of LCD; And

Odd number line with described panel of LCD during described driving switches to high impedance status.

6. method according to claim 5 comprises:

Be driven into second common electric voltage with one in the odd number line of described panel of LCD; And

Even number line with described panel of LCD during described driving switches to high impedance status.

7. method according to claim 6, wherein, described first common electric voltage comprises the high common electric voltage greater than described second common electric voltage.

8. method according to claim 6 comprises:

Reverse in second image duration that frame the refreshes polarity of each continuous lines of described panel of LCD, wherein said counter-rotating comprises:

Be driven into described second common electric voltage with one in the even number line of described panel of LCD; And

9. panel of LCD comprises:

First electrode driver, this first electrode driver is couple to one or more common logic electrodes, and wherein, this first electrode driver is configured to switch to high impedance status during one or more line to described panel of LCD reverses; And

Be couple to one or more groups line of described one or more logic public electrodes, wherein, the number of buses that the line number of each group in described one or more groups line comprises described panel of LCD is divided by one or more groups quantity.

10. panel of LCD according to claim 9, wherein, described each group comprises the single line of described panel of LCD.

11. panel of LCD according to claim 10, wherein, described each group is couple to a logic public electrode.

12. panel of LCD according to claim 9, wherein, described each group comprises four lines of described panel of LCD.

13. panel of LCD according to claim 12, wherein, described each group is couple to two logic public electrodes.

14. a changing method that is used for panel of LCD comprises:

The polarity of switching liquid crystal display panel during frame refreshes, wherein said switching comprises:

Switch the polarity of first group of line of described panel of LCD; And

Between the polarity epoch of the described first group of line of described switching, second group of line of described panel of LCD switched to high impedance status.

15. method according to claim 14, wherein, switch described first group of line and comprise: one or more logic common electrode drive that will be couple to described first group of line are to first common electric voltage.

16. method according to claim 14 comprises the polarity of switching described second group of line.

17. method according to claim 16, the polarity that is included in described second group of line switches to high impedance status with described first group of line of described panel of LCD between transfer period.

18. a method of operating panel of LCD comprises:

The first common electrode drive device of drive circuit is switched to first common electric voltage, and wherein, the described first common electrode drive device is couple to the one one or more lines of described panel of LCD; And

The float second common electrode drive device of drive circuit, wherein, the described second common electrode drive device is couple to the two one or more lines of described panel of LCD.

19. method according to claim 18, wherein, the second common electrode drive device of floating comprises: with the described second common electrode drive device and described first common electric voltage and the disconnection of second common electric voltage.

20. method according to claim 19, wherein, disconnecting the described second common electrode drive device comprises: the switch that will be couple to the described second common electrode drive device switches to intermediateness, makes described switch and described first common electric voltage and the described second common electrical piezoelectricity disconnect.

21. an inversion apparatus that is used for panel of LCD comprises:

Be used for during frame refreshes the device of the right polarity of each continuous two line of counter-rotating panel of LCD, it comprises:

Be used for first line of the described two line centerings of panel of LCD is driven into the device of first common electric voltage;

Be used for during described driving, second line of described two line centerings being switched to the device of high impedance status;

Be used for described second line of described two line centerings is driven into the device of second common electric voltage; And

Be used for described first line of described two line centerings is switched to the device of high impedance status.

22. equipment according to claim 21, wherein, the device that described described second line that is used for described two line centerings switches to high impedance status comprises: be used for and will be couple to the device that described second-line public electrode switches to described high impedance status.

23. equipment according to claim 22 wherein, describedly is used for the device that described public electrode switches to described high impedance status reduced or has eliminated described public electrode and be used to drive the Current draw of the driver of described public electrode.

24. equipment according to claim 21, wherein, the device of the described right polarity of each two continuous line that is used for reversing comprises: be used for coming with following speed each device of a plurality of public electrodes of switching liquid crystal display panel, half of number of buses that this speed equals panel of LCD multiply by the refresh rate that frame refreshes.

25. an inversion apparatus that is used for panel of LCD comprises:

Be used for the device of the polarity of each continuous lines of counter-rotating panel of LCD during frame refreshes, wherein, described continuous lines comprises even number line and odd number line, and it comprises:

Be used for a device that is driven into first common electric voltage with the even number line of described panel of LCD; And

Be used for during described driving, the odd number line of described panel of LCD being switched to the device of high impedance status.

26. equipment according to claim 25 comprises:

Be used for a device that is driven into second common electric voltage with the odd number line of described panel of LCD; And

Be used for during described driving, the even number line of described panel of LCD being switched to the device of high impedance status.

27. equipment according to claim 26, wherein, described first common electric voltage comprises the high common electric voltage greater than described second common electric voltage.

28. equipment according to claim 26 comprises:

Be used for the reversing device of polarity of each continuous lines of described panel of LCD in second image duration that frame refreshes, it comprises:

Be used for a device that is driven into described second common electric voltage with the even number line of described panel of LCD; And

29. a switching device that is used for panel of LCD comprises:

Be used for the device of the polarity of switching liquid crystal display panel during frame refreshes, it comprises:

Be used to switch the device of polarity of first group of line of described panel of LCD; And

Be used between the polarity epoch of the described first group of line of described switching, second group of line of described panel of LCD switched to the device of high impedance status.

30. equipment according to claim 29, wherein, the device of the polarity of the described first group of line that is used to switch described panel of LCD comprises: be used for and will be couple to the device of one or more logic common electrode drive of described first group of line to first common electric voltage.

31. equipment according to claim 29 comprises the device of the polarity that is used to switch described second group of line.

32. equipment according to claim 31 comprises the device that is used for the polarity of described second group of line between transfer period being switched to described first group of line of described panel of LCD high impedance status.

33. an equipment of operating panel of LCD comprises:

Be used for the first common electrode drive device of drive circuit is switched to the device of first common electric voltage, wherein, the described first common electrode drive device is couple to the one one or more lines of described panel of LCD; And

Be used to the to float device of the second common electrode drive device of drive circuit, wherein, the described second common electrode drive device is couple to the two one or more lines of described panel of LCD.

34. equipment according to claim 33, wherein, the device of the second common electrode drive device of the described drive circuit that is used to float comprises: be used for device that the described second common electrode drive device and described first common electric voltage and second common electric voltage are disconnected.

35. equipment according to claim 34, wherein, described being used for comprises the device of the described second common electrode drive device and described first common electric voltage and the disconnection of second common electric voltage: the switch that is used for being couple to the described second common electrode drive device switches to intermediateness, the device that makes the disconnection of described switch and described first common electric voltage and the described second common electrical piezoelectricity.