CN105139814A - Liquid crystal display and display method thereof - Google Patents
Liquid crystal display and display method thereof Download PDFInfo
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Abstract
The invention discloses a liquid crystal display and a display method thereof. The display method of the liquid crystal display comprises the following steps: acquiring the brightness of each display area under the current scene and the brightness of each display area under next scene; calculating the difference between the brightness of each display area under the current scene and the brightness of each display area under next scene, and comparing each brightness difference with a set threshold; and controlling display in a display area at middle brightness under the current scene when the brightness difference of the display area is greater than the set threshold, wherein the brightness of the display area under the current scene < the middle brightness < the brightness of the display area under next scene. When the brightness of the display area under the current scene and the brightness of the display area under next scene differ greatly, display is carried out in the display area at the middle brightness under the current scene. Therefore, the difference between the brightness of the display area under the current scene and the brightness of the display area under next scene is reduced, and the effect of visual experience is improved.
Description
Technical field
The present invention relates to display technology field, be specifically related to a kind of liquid crystal display and display packing thereof.
Background technology
LCD TV backlight region regulation technology and Local-dimming technology, refer to that picture signal is divided into some viewing areas by liquid crystal television system, and carry out analytical calculation according to each viewing area brightness of image, thus automatically control the secretly bright of each viewing area backlight.
The lcoal-dimming technology that local dimming technology LED liquid crystal television is desirable, the brightness of each viewing area controls separately, namely corresponding according to the picture of each viewing area brightness of image, the brightness of difference control LED in various degree, be equivalent to Integral back photocontrol mode, while saving power, improve the contrast of picture.But under the extreme case that indivedual picture contrast is larger, such as: the bright field scape having movement below black background, because the movement of backlight along with bright field scape is just lit one by one, just can find out backlight above vision has an obvious bright dark change procedure, causes visual experience deleterious.
Fig. 1 to Fig. 3 is local dimming schematic diagram, LCDs (LED backlight) is divided into multiple viewing area (as 1 in Fig. 1, 2, ..., N), LED backlight corresponding to each viewing area is controlled by different back light driving circuits respectively, the all corresponding certain back light drive current of often kind of GTG of image and a corresponding brightness value, suppose the difference not considering each LED, the brightness value that the back light of so each viewing area is corresponding under identical electric current is the same, as picture signal is divided according to 2 system 8 bit data, then picture signal can be divided into 255 GTGs, when gray-scale value is 0: corresponding electric current is minimum, corresponding is black scene, when gray-scale value is 255: corresponding electric current is maximum, corresponding is the brightest bright field scape.If in an image scene, the bright spot of a motion is had when picture signal is black background, there is a bright spot as shown in Figure 2, the position of current bright spot is viewing area 1, with further reference to Fig. 3, the direction of motion of bright spot is the viewing area 2 to the right, during current scene display, LED backlight corresponding in viewing area 1 is needed to light, when later scene shows, then need to close LED backlight in viewing area 1, namely the back light driving circuit of viewing area 1 correspondence provides minimum drive current, and need the current value that provides viewing area 2 certain simultaneously, certain display brightness can be reached, due to the persistence of vision of human eye, significantly can feel that the LED of viewing area 2 is from the process secretly brightened, and the smoothness sensation of the picture that lacks exercise, cause poor visual effect.
Summary of the invention
Fundamental purpose of the present invention is the display packing providing a kind of display and liquid crystal display, is intended to the problem solving current LCD TV visual experience weak effect when picture contrast is larger.
For arriving above-mentioned technical purpose, the invention provides a kind of display packing of liquid crystal display, the display packing of described liquid crystal display comprises the following steps:
Obtain the brightness value of each viewing area under current scene and later scene;
Calculate the luminance difference of each viewing area under current scene and later scene, and the size between more described luminance difference and setting threshold values;
When the described luminance difference of a certain viewing area is greater than described setting threshold values, control described a certain viewing area to show with median luminance value under current scene, the brightness value of a certain viewing area under later scene described in median luminance value < described in the brightness value L EssT.LTssT.LT of described a certain viewing area under current scene.
Preferably, the brightness value of described a certain viewing area under current scene is the first brightness value, the brightness value of described a certain viewing area under later scene is the second brightness value, described each viewing area with described first brightness value display time for dim dark state, when showing with described second brightness value for illuminating state, the viewing area adjacent with described a certain viewing area shows with described second brightness value under current scene, shows under later scene with described first brightness value.
Preferably, calculate the luminance difference of each viewing area under current scene and later scene, and more described luminance difference and setting threshold values between size step after also comprise:
When the described luminance difference of a certain viewing area is less than described setting threshold values, controls described a certain viewing area and show with the brightness value of described a certain viewing area under current scene under current scene.
Preferably, the step obtaining the brightness value of each viewing area under current scene and later scene comprises:
Digital signal processor sends the brightness data of each viewing area in current scene to controller;
Described controller receives each viewing area after the brightness data of current scene, the brightness data to each viewing area that described digital signal processor feedback reception arrives in current scene;
Compare at the brightness data of current scene and the brightness data of issued current scene in each viewing area of the feedback received by described digital signal processor;
When comparison result is consistent, described digital signal processor sends the brightness data of later scene to controller, described controller using each viewing area of finally receiving at the brightness data of current scene as the brightness value of each viewing area described under current scene;
Described controller receives each viewing area after the brightness data of later scene, the brightness data to each viewing area that described digital signal processor feedback reception arrives at later scene;
Compare at the brightness data of later scene and the brightness data of issued later scene in each viewing area of the feedback received by described digital signal processor;
When comparison result is consistent, described controller using each viewing area of finally receiving at the brightness data of later scene as the brightness value of each viewing area described under later scene.
Preferably, each viewing area of the feedback received after the step that the brightness data of current scene and the brightness data of issued current scene are compared, also comprises by described digital signal processor:
When comparison result is inconsistent, described digital signal processor continues to send the brightness data of each viewing area in current scene to described controller;
Each viewing area of the feedback received after the step that the brightness data of later scene and the brightness data of issued later scene are compared, also comprises by described digital signal processor:
When comparison result is inconsistent, described digital signal processor continues to send the brightness data of each viewing area at later scene to described controller.
For arriving above-mentioned technical purpose, the present invention provides again a kind of liquid crystal display, it is characterized in that, it comprises the digital signal processor of electric connection, controller, driver and display screen, and described controller comprises brightness value acquisition module, luminance difference computing module, drive control module:
Described digital signal processor is in order to send the brightness data of each viewing area under current scene and later scene;
Described brightness value acquisition module, in order to the brightness data of each viewing area under current scene and later scene, obtains the brightness value of each viewing area under current scene and later scene;
Described luminance difference computing module is in order to calculate the luminance difference of each viewing area under current scene and later scene, and the size between more described luminance difference and setting threshold values;
Described drive control module is in order to when the described luminance difference of a certain viewing area is greater than described setting threshold values, control the LED of display screen described in described driver drives, described a certain viewing area is shown under current scene, the brightness value of a certain viewing area under later scene described in median luminance value < described in the brightness value L EssT.LTssT.LT of described a certain viewing area under current scene with median luminance value.
Preferably, the brightness value of described a certain viewing area under current scene is the first brightness value, the brightness value of described a certain viewing area under later scene is the second brightness value, described each viewing area with described first brightness value display time for dim dark state, when showing with described second brightness value for illuminating state, the viewing area adjacent with described a certain viewing area shows with described second brightness value under current scene, shows under later scene with described first brightness value.
Preferably, described drive control module is also in order to when the described luminance difference of a certain viewing area is less than described setting threshold values, control the LED of display screen described in described driver drives, described a certain viewing area is shown with the brightness value of described a certain viewing area under current scene under current scene.
Preferably, described digital signal processor comprises brightness data sending module, brightness data recycling module, brightness data comparing module and data and sends control module, and described brightness value acquisition module comprises brightness data receiving element, brightness data feedback unit and brightness data pickup unit:
In order to there is the brightness data of each viewing area under current scene in described brightness data sending module;
Described brightness data receiving element is in order to receive the brightness data of each viewing area under current scene;
Each viewing area brightness data under current scene of described brightness data feedback unit in order to arrive to described brightness data recycling module feedback reception;
Described brightness data recycling module is in order to connect the brightness data of each viewing area under scene of feedback;
Described brightness data comparing module is in order to compare brightness data and each viewing area issued brightness data under current scene of each viewing area of the feedback received under current scene;
Described data send control module in order to when comparison result is consistent, control described brightness data sending module and send the brightness data of each viewing area under later scene;
Each viewing area brightness data brightness value as each viewing area under later scene under later scene of described brightness data pickup unit in order to will finally receive;
Described brightness data receiving element is also in order to receive the brightness data of each viewing area under later scene;
Each viewing area brightness data under later scene of described brightness data feedback unit also in order to arrive to described brightness data recycling module feedback reception;
Described brightness data recycling module is also in order to connect the brightness data of each viewing area under later scene of feedback;
Described brightness data comparing module is also in order to compare brightness data and each viewing area issued brightness data under later scene of each viewing area of the feedback received under later scene;
Described data send control module also in order to when comparison result is consistent, control described brightness data sending module and send the brightness data of each viewing area under follow-up scene;
Each viewing area brightness data brightness value as each viewing area under later scene under later scene of described brightness data pickup unit also in order to will finally receive.
Preferably, described data send control module also in order to when comparison result is inconsistent, control described brightness data sending module and continue to send the brightness data of each viewing area in corresponding scene.
Preferably, the viewing area of described each brightness viewing area corresponding to multiple LED, described driver comprises multiple driving chip of the LED driving setting quantity respectively, the brightness data input pin of driving chip described in one of them is connected with the brightness data output pin of described data-signal plate, the brightness data input pin of driving chip described in remaining is electrically connected with the brightness data output pin of adjacent driving chip successively, the brightness data input pin of the brightness data output pin and described digital signal processor that are positioned at last driving chip is connected, described controller is electrically connected with described multiple driving chip respectively, in order to obtain the brightness data of each viewing area under current scene and later scene in described multiple driving chip.
The display packing of liquid crystal display provided by the invention and liquid crystal display, the display packing of described liquid crystal display comprises the following steps: obtain the brightness value of each viewing area under current scene and later scene; Calculate the luminance difference of each viewing area under current scene and later scene, and the size between more described luminance difference and setting threshold values; When the described luminance difference of a certain viewing area is greater than described setting threshold values, control described a certain viewing area to show with median luminance value under current scene, the brightness value of a certain viewing area under later scene described in median luminance value < described in the brightness value L EssT.LTssT.LT of described a certain viewing area under current scene.When the difference in brightness of described a certain viewing area under current scene and later scene is larger, when current scene display, described a certain viewing area can be shown with described median luminance value, and then make, the brightness change of described a certain viewing area under current scene and later scene reduces, and improve visual experience effect, thus avoid the brightness when current scene and later scene display of described a certain viewing area to change too greatly, and cause visual experience effect too poor.
Accompanying drawing explanation
The schematic diagram of the display screen of the liquid crystal display that Fig. 1 provides for background technology;
The schematic diagram of display screen under current scene that Fig. 2 is the liquid crystal display shown in Fig. 1;
The schematic diagram of display screen under later scene that Fig. 3 is the liquid crystal display shown in Fig. 1;
Fig. 4 is the schematic flow sheet of an embodiment of the display packing of liquid crystal display provided by the invention;
The part run schematic diagram that Fig. 5 is the step S10 shown in Fig. 4;
Another part schematic flow sheet that Fig. 6 is the step S10 shown in Fig. 4;
Fig. 7 is the block schematic illustration of the part-structure of an embodiment of liquid crystal display provided by the invention;
Fig. 8 is the block schematic illustration of the digital signal generator of the liquid crystal display shown in Fig. 7;
Fig. 9 is the block schematic illustration of the controller of the liquid crystal display shown in Fig. 7;
The block schematic illustration of the brightness value acquiring unit that Figure 10 is the controller shown in Fig. 9;
Figure 11 is the principle schematic of the part-structure of the liquid crystal display shown in Fig. 7;
Figure 12 is the schematic diagram of the display screen of the liquid crystal display shown in Figure 11;
The schematic diagram under current scene of the display screen that Figure 13 is the liquid crystal display shown in Figure 11;
The schematic diagram under later scene of the display screen that Figure 14 is the liquid crystal display shown in Figure 11.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Technical scheme of the present invention is further illustrated below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The invention provides a kind of display packing of liquid crystal display, refer to Fig. 4 to Fig. 6, in an embodiment of the display packing of liquid crystal display provided by the invention, the display packing of described liquid crystal display comprises the following steps:
Step S10, obtain the brightness value of each viewing area under current scene and later scene;
In step S10, described viewing area can be the viewing area that single led lamp is corresponding, also can be viewing area corresponding to multiple LED, as in the embody rule example of Figure 11, for reducing power consumption, desirable each pixel can not be taked in practical application to control separately, generally the display screen of described liquid crystal display is divided into several viewing areas, the corresponding multiple LED in each viewing area and corresponding multiple pixel, particularly, in this application embodiment, the resolution of the display screen of described liquid crystal display is 1920*1080, the display screen of described liquid crystal display is divided into 96 viewing areas.Current scene is namely will display frame, later scene is the next display frame after current scene has shown, therefore, later scene can look at the current scene into next but one scene, also, namely, in step S10, current scene and later scene are two adjacent display frames, current scene is previous display frame, and later scene is a rear display frame.
Step S12, calculate the luminance difference of each viewing area under current scene and later scene, and the size between more described luminance difference and setting threshold values;
Step S14, when the described luminance difference of a certain viewing area is greater than described setting threshold values, control described a certain viewing area to show with median luminance value under current scene, the brightness value of a certain viewing area under later scene described in median luminance value < described in the brightness value L EssT.LTssT.LT of described a certain viewing area under current scene.
In step S12 in step S14, described setting threshold values can be an empirical value, when described luminance difference is greater than described setting threshold values, user, when observing current scene and later scene, obviously feels significantly change occurs for the brightness of described a certain viewing area.Therefore, in the present invention, when described a certain viewing area, the difference in brightness under current scene and later scene is larger, when namely exceeding described setting threshold values, when current scene display, described a certain viewing area can be shown with described median luminance value, and then make, the brightness change of described a certain viewing area under current scene and later scene reduces, and improve visual experience effect, thus avoid the brightness when current scene and later scene display of described a certain viewing area to change too greatly, and cause visual experience effect too poor.
In the present embodiment, also comprise after step S12:
Step S16, when the described luminance difference of a certain viewing area is less than described setting threshold values, controls described a certain viewing area and show with the brightness value of described a certain viewing area under current scene under current scene.In step S16, when described luminance difference is less than described setting threshold values, user is when observing current scene and later scene, and significantly change occurs in the brightness of imperceptible described a certain viewing area.
In the present embodiment, the brightness value of described a certain viewing area under current scene is the first brightness value (such as gray-scale value is 0), the brightness value of described a certain viewing area under later scene is the second brightness value (such as gray-scale value is 255), described each viewing area with described first brightness value display time for dim dark state, when showing with described second brightness value for illuminating state, the viewing area adjacent with described a certain viewing area shows with described second brightness value under current scene, show with described first brightness value under later scene, also namely in the present embodiment, the display screen of described liquid crystal display shows as the action of lighting continuously.
In the present embodiment, step S10 comprises:
Step S101, digital signal processor send the brightness data of each viewing area in current scene to controller;
Step S102, described controller receive each viewing area after the brightness data of current scene, the brightness data to each viewing area that described digital signal processor feedback reception arrives in current scene;
Compare at the brightness data of current scene and the brightness data of issued current scene in each viewing area of the feedback received by step S103, described digital signal processor;
Step S104, when comparison result is consistent, described digital signal processor sends the brightness data of later scene to controller, described controller using each viewing area of finally receiving at the brightness data of current scene as the brightness value of each viewing area described under current scene;
Step S105, described controller receive each viewing area after the brightness data of later scene, the brightness data to each viewing area that described digital signal processor feedback reception arrives at later scene;
Compare at the brightness data of later scene and the brightness data of issued later scene in each viewing area of the feedback received by step S106, described digital signal processor;
Step S107, when comparison result is consistent, described controller using each viewing area of finally receiving at the brightness data of later scene as the brightness value of each viewing area described under later scene.
In step S101 in step S107, a rectification is carried out to the brightness value of each viewing area of acquisition under current scene and later scene, prevent, the brightness value that described controller receives under the current scene and later scene that the brightness value of each viewing area under current scene and later scene and described digital signal processor send out is inconsistent.
In the present embodiment, after step S103, also comprise:
S108, when comparison result is inconsistent, described digital signal processor continues to send the brightness data of each viewing area in current scene to described controller;
After step S106, also comprise:
S109, when comparison result is inconsistent, described digital signal processor continues to send the brightness data of each viewing area at later scene to described controller.
The present invention provides again a kind of liquid crystal display, refer to Fig. 7 to Figure 10, in an embodiment of liquid crystal display provided by the invention, described liquid crystal display comprises the digital signal processor 1 of electric connection, controller 2, driver 3 (can be the driving chip of the LED in order to driving liquid crystal displays of various current common and following release), display screen 4 and power supply (not shown).
Described digital signal processor 1 can be existing digital signal plate etc., and described digital signal processor 1 is in order to send each viewing area (41,42 ... brightness data 4N) under current scene and later scene.The brightness data of described digital signal processor 1 derives from picture data from the memory device and external device of described liquid crystal display etc.
Described viewing area (41, 42 ... 4N) can be the viewing area (41 that single led lamp is corresponding, 42 ... 4N), also can be viewing area (41 corresponding to multiple LED, 42 ... 4N), as in the embody rule example of Fig. 4, for reducing power consumption, desirable each pixel can not be taked in practical application to control separately, generally the display screen 4 of described liquid crystal display is divided into several viewing areas (41, 42 ... 4N), each viewing area (41, 42 ... 4N) corresponding multiple LED and corresponding multiple pixel, particularly, in this application embodiment, the resolution of the display screen 4 of described liquid crystal display is 1920*1080, the display screen 4 of described liquid crystal display is divided into 96 viewing areas (41, 42 ... 4N).Current scene is namely will display frame, later scene is the next display frame after current scene has shown, therefore, later scene can look at the current scene into next but one scene, current scene and later scene are two adjacent display frames, current scene is previous display frame, and later scene is a rear display frame.
Described controller 2 comprises brightness value acquisition module 21, luminance difference computing module 22, drive control module 23.Described brightness value acquisition module 21 is in order to each viewing area (41,42 ... brightness data 4N) under current scene and later scene, obtains each viewing area (41,42 ... brightness value 4N) under current scene and later scene.Described luminance difference computing module 22 is in order to calculate each viewing area (41,42 ... luminance difference 4N) under current scene and later scene, and the size between more described luminance difference and setting threshold values.Described drive control module 23 is in order to work as a certain viewing area (41,42 ... when described luminance difference 4N) is greater than described setting threshold values, control the LED that described driver 3 drives described display screen 4, make described a certain viewing area (41,42 ... 4N) show with median luminance value under current scene, described a certain viewing area (41,42 ... a certain viewing area (41,42 described in median luminance value < described in brightness value L EssT.LTssT.LT 4N) under current scene ... brightness value 4N) under later scene.
Described setting threshold values can be an empirical value, when described luminance difference is greater than described setting threshold values, user, when observing current scene and later scene, obviously feels to obtain described a certain viewing area (41,42 ... there is significantly change in brightness 4N).Therefore, in the present invention, when described a certain viewing area (41, 42 ... difference in brightness 4N) under current scene and later scene is larger, when namely exceeding described setting threshold values, can when current scene display by described a certain viewing area (41, 42 ... 4N) show with described median luminance value, and then make, described a certain viewing area (41, 42 ... brightness change 4N) under current scene and later scene reduces, and improve visual experience effect, thus avoid described a certain viewing area (41, 42 ... 4N) when current scene and later scene display, brightness changes too greatly, and cause visual experience effect too poor.
When described a certain viewing area (41, 42 ... difference in brightness 4N) under current scene and later scene is larger, when namely exceeding described setting threshold values, can when current scene display by described a certain viewing area (41, 42 ... 4N) show with described median luminance value, and then make, described a certain viewing area (41, 42 ... brightness change 4N) under current scene and later scene reduces, and improve visual experience effect, thus avoid described a certain viewing area (41, 42 ... 4N) when current scene and later scene display, brightness changes too greatly, and cause visual experience effect too poor.
Described drive control module 23 is also in order to work as a certain viewing area (41,42 ... when described luminance difference 4N) is less than described setting threshold values, control the LED that described driver 3 drives described display screen 4, make described a certain viewing area (41,42 ... 4N) under current scene with described a certain viewing area (41,42 ... brightness value 4N) under current scene shows.When described luminance difference is less than described setting threshold values, user observe current scene and later scene time, imperceptible described a certain viewing area (41,42 ... there is significantly change in brightness 4N).
In the present embodiment, described a certain viewing area (41, 42 ... brightness value 4N) under current scene is the first brightness value (such as gray-scale value is 0), described a certain viewing area (41, 42 ... brightness value 4N) under later scene is the second brightness value (such as gray-scale value is 255), described each viewing area (41, 42 ... 4N) with described first brightness value display time for dim dark state, when showing with described second brightness value for illuminating state, with described a certain viewing area (41, 42 ... 4N) adjacent viewing area (41, 42 ... 4N) show with described second brightness value under current scene, show with described first brightness value under later scene.Also, namely in the present embodiment, the display screen 4 of described liquid crystal display shows as the action of lighting continuously.
Described digital signal processor 1 comprises brightness data sending module 11, brightness data recycling module 12, brightness data comparing module 13 and data and sends control module 14, and described brightness value acquisition module 21 comprises brightness data receiving element 211, brightness data feedback unit 212 and brightness data pickup unit 213.
Described digital signal processor 1 obtains each viewing area (41,42 ... brightness value course of work 4N) under current scene is as follows:
Described brightness data sending module 11 sends each viewing area (41, 42 ... brightness data 4N) under current scene, described brightness data receiving element 211 receives each viewing area (41, 42 ... brightness data 4N) under current scene, each viewing area (41 that described brightness data feedback unit 212 arrives to described brightness data recycling module 12 feedback reception, 42 ... brightness data 4N) under current scene, described brightness data recycling module 12 receives each viewing area (41 of feedback, 42 ... brightness data 4N) under scene, each viewing area (41 of feedback that described brightness data comparing module 13 will receive, 42 ... brightness data 4N) under current scene and each viewing area (41 issued, 42 ... brightness data 4N) under current scene is compared: when comparison result is consistent, described data transmission control module 14 controls described brightness data sending module 11 and sends each viewing area (41, 42 ... brightness data 4N) under later scene, when comparison result is inconsistent, described data send control module 14 and control each viewing area (41 of described brightness data sending module 11 continuation transmission, 42 ... 4N) at the brightness data of corresponding scene, each viewing area (41 that described brightness data pickup unit 213 will finally receive, 42 ... brightness data 4N) under current scene is as each viewing area (41, 42 ... brightness value 4N) under current scene.
Described digital signal processor 1 obtains each viewing area (41,42 ... brightness value course of work 4N) under later scene is as follows:
Described brightness data receiving element 211 receives each viewing area (41, 42 ... brightness data 4N) under later scene, each viewing area (41 that described brightness data feedback unit 212 arrives to described brightness data recycling module 12 feedback reception, 42 ... brightness data 4N) under later scene, described brightness data recycling module 12 receives each viewing area (41 of feedback, 42 ... brightness data 4N) under later scene, each viewing area (41 of feedback that described brightness data comparing module 13 will receive, 42 ... brightness data 4N) under later scene and each viewing area (41 issued, 42 ... brightness data 4N) under later scene is compared: when comparison result is consistent, described data transmission control module 14 controls described brightness data sending module 11 and sends each viewing area (41, 42 ... brightness data 4N) under follow-up scene, when comparison result is inconsistent, described data send control module 14 and control described brightness data sending module 11 continuation transmission each viewing area (41,42 ... brightness data 4N) under next scene, each viewing area (41,42 that described brightness data pickup unit 213 will finally receive ... brightness data 4N) under later scene is as each viewing area (41,42 ... brightness value 4N) under later scene.
Refer to Figure 11 to Figure 14, the Application Example in liquid crystal display provided by the invention and display packing thereof:
Described derived digital signal is specially digital signal plate, controller is specially the MCU of crossing current plate, driver is the LED drive chip of crossing current plate, and described MCU is the brightness data being received each viewing area under current scene and later scene by described LED drive chip.
For reducing power consumption, desirable each pixel can not be taked in practical application to control separately, generally the display screen of described liquid crystal display is divided into multiple viewing area, the corresponding multiple pixel in each viewing area, particularly, in the present embodiment, the display screen of described liquid crystal display is divided 96 viewing areas, in the present embodiment, power panel provides 12V power supply to crossing current plate and digital signal plate, voltage conversion circuit or chip etc. is had in described digital signal plate, carry out being converted to the voltage required for the work of described digital signal plate with the voltage that described power panel is provided, similarly, crossing current plate is also designed with voltage conversion circuit or chip etc., voltage after conversion is for the MCU of described crossing current plate, the requirements of one's work such as LED drive chip.
Digital signal plate has the pin be connected with LED drive chip in crossing current plate and has SPI_EN, SPI_MOSI, SPI_MISO, SPI_SCK, Vsync, crossing current plate is designed with 6 16 paths of LEDs driving chip, every LEDs driving chip can drive the LED of 16 viewing areas, therefore the LED of 96 viewing areas can be driven altogether, LED drive chip has the pin be connected with the SOC of digital signal plate and has SPI_EN, SIMO, SOMI, SCK, Vsync, wherein, SPI_EN is the enable pin of driving chip, SIMO correspondence is connected with SPI_MOSI, represent main frame export and input from machine, namely the signal of LED drive chip is defeated by by digital signal plate, this signal is mainly used to the brightness letter data of the pixel transmitting each viewing area corresponding, the corresponding SPI_SOMI of MISO, represent the signal that LED drive chip is defeated by SOC, the brightness data of the pixel of each viewing area of namely feeding back, it is the confirmation to brightness data, if when the brightness data that the brightness data that digital signal plate is received by SPI_SOMI exports with SPI_MOSI is inconsistent, then represent brightness data and transfer to the generation of described LED drive chip extremely from described digital signal plate, transmission can be proceeded, the corresponding SCK of SPI_SCK, provides the clock signal of LED drive chip, and Vsync corresponding Vsync provide field sync signal.
The viewing area of described each viewing area corresponding to multiple LED, described driver 3 comprises multiple driving chip of the LED driving setting quantity respectively, the brightness data input pin of driving chip described in one of them is connected with the brightness data output pin of described data-signal plate, the brightness data input pin of driving chip described in remaining is electrically connected with the brightness data output pin of adjacent driving chip successively, the brightness data output pin being positioned at last driving chip is connected with the brightness data input pin of described digital signal plate, described controller is electrically connected with described multiple driving chip respectively, in order to obtain the brightness data of each viewing area under current scene and later scene in described multiple driving chip, specific as follows: in LED drive chip, adopt the connected mode of daisy chain, namely the signal of SPI_MOSI exports to the first LEDs driving chip, after the SIMO of the first LEDs driving chip receives signal, the SIMO of the second LEDs driving chip is transferred to by the SOMI of self, then the signal received from SIMO is transferred to the SIMO of the 3rd LEDs driving chip by the second LEDs driving chip by the SOMI of self chip, ...., until the 6th LEDs driving chip, the SOMI of the 6th LEDs driving chip exports to the SPI_MISO of digital signal plate, and the Vsync of described digital signal plate, SPI_EN, SPI_SCK is then with the corresponding Vsync of every LEDs driving chip, SPI_EN and SCK connects respectively, namely parallel relationship is equivalent to.
MCU controls the brightness data that every paths of LEDs driving chip obtains each viewing area that digital signal plate transmits respectively, such as: the brightness data in first via LED drive chip acquisition 1-16 region, the second paths of LEDs driving chip obtain brightness data, the brightness data in the 3rd paths of LEDs driving chip acquisition 33-48 region, the brightness data in the 4th paths of LEDs driving chip acquisition 49-64 region, the brightness data in the 5th paths of LEDs driving chip acquisition 65-80 region, the brightness data in the 6th paths of LEDs driving chip acquisition 81-96 region in 17-32 region.
Illustrate for the display packing of the display of the resolution of 1920*1080 to the liquid crystal display that the present embodiment provides below:
As Figure 12 list the display of the resolution of 1920*1080 each viewing area, according to numerical order numbering, wherein pixel to down the 1st being classified as A1B1, A1B2, A1B3.....A1B1079, A1B1080; Pixel to down the 2nd being classified as A2B1, A2B2, A2B3.....A2B1079, A3B1080; Pixel to down the 3rd being classified as A3B1, A3B2, A3B3.....A3B1079, A3B1080; ....; Until the 1920th row pixel to being down A1920B1, A1920B2, A1920B3.....A1920B1079, A1920B1080; And what this pixel was evenly distributed according to viewing area below is distributed in each viewing area.
The transmission aspect of data, after first via LED drive chip obtains the brightness data of 1-16 viewing area, by the content of the brightness data table of oneself acquisition to the 1-16 viewing area of the whole brightness data table of replacement; After second paths of LEDs driving chip obtains the brightness data of 17-32 viewing area, by the content of the brightness data table of oneself acquisition to the 17-32 viewing area of the whole brightness data table of replacement; After 3rd paths of LEDs driving chip obtains the brightness data of 33-48 viewing area, by the content of the brightness data table of oneself acquisition to the 33-48 viewing area of the whole brightness data table of replacement; After 4th paths of LEDs driving chip obtains the brightness data of 49-64 viewing area, by the content of the brightness data table of oneself acquisition to the 49-64 viewing area of the whole brightness data table of replacement; After 5th paths of LEDs driving chip obtains the brightness data of 65-80 viewing area, by the content of the brightness data table of oneself acquisition to the 65-80 viewing area of the whole brightness data table of replacement; After 6th paths of LEDs driving chip obtains the brightness data of 81-96 viewing area, by the content of the brightness data table of oneself acquisition to the 81-96 viewing area of the whole brightness data table of replacement, so, the brightness data that final digital signal plate receives is the brightness data of crossing current plate feedback.
Crossing current plate aspect, MCU is according to the brightness data of each viewing area pixel of each viewing area, according to set algorithm, obtain the current value of the brightness display required for the display of viewing area, control each driving chip respectively and drive the LED of each viewing area luminous according to a certain percentage.If the corresponding LED of desirable each pixel, then the direct brightness according to each pixel drives each LED, then do not need the brightness estimating required for the display of each viewing area by algorithm.
Carry out driving LED lamp for LED drive chip by pulse width to explain: if when brightness value reaches maximum, the dutycycle of pulse width is 80%, in the darkest, the dutycycle of pulse width is 10%, as in Figure 13, white background representative luminance value in viewing area 4 is in maximum bright spot, in the present embodiment, this bright spot direction of motion is from left to right, and light 84-viewing area, 76-viewing area, 68-viewing area, 60-viewing area, 52-viewing area, 44-viewing area, 36-viewing area, 28-viewing area, 20-viewing area, 12-viewing area, 4-viewing area, viewing area 92 successively.Digital signal plate aspect, brightness data transmission is transmitted according to 2 system, 8 rules, then when pixel corresponds to 0, then this pixel is complete black display, and when pixel corresponds to 255, then this pixel is the brightest display and bright spot.
Be current scene in Figure 13: viewing area 4 brightness is maximum brightness value, and the brightness of other viewing areas is minimum value, then the brightness data gray-scale value that the pixel of viewing area 4 is corresponding is 255, and the brightness data gray-scale value of other viewing areas is 0.If Figure 14 is later scene: viewing area 12 reaches high-high brightness, other are black background, then by viewing area 12.
First, crossing current plate MCU received the brightness data of each viewing area under current scene by LED drive chip after, by viewing area 4, namely the 4th road driver output dutycycle of LED drive chip 1 is 80%, the dutycycle that other 15 tunnels and other LED drive chip groups all export is 10%, and in advance by the brightness data of each viewing area under current scene (table), send to the LED drive chip of crossing current plate, LED drive chip can store each viewing area brightness data under current scene (table);
Then, crossing current plate MCU received the brightness data of each viewing area under later scene by LED drive chip after, be 80% by the 12nd road driver output dutycycle of LED drive chip 1, the dutycycle that other 15 tunnels and other LED drive chip groups all export is 10%, and by the brightness data of each viewing area under later scene (table), send to the LED drive chip of crossing current plate, LED drive chip can store each viewing area brightness data under later scene (table);
Then, MCU is by reading and the brightness data of each viewing area under current scene and later scene in more described LED drive chip, show that the brightness of viewing area 12 under current scene and later scene changes greatly, namely viewing area 12 by dark in bright change procedure, for this reason, when MCU controls LED drive chip driving LED lamp display current scene, by the dutycycle of viewing area 12, 45% (i.e. the half of later scene brightness) is risen to gradually by 10%, and when moving to viewing area 20, viewing area 28, viewing area 36, viewing area 44, viewing area 52, viewing area 60, viewing area 68, viewing area 76, viewing area 84, during viewing area 92, also successively when current scene, the LED brightness of next viewing area is reached the half of maximal value, namely current scene is that white scene is in viewing area 20, when other are black, then the driving dutycycle of viewing area 28 is progressively risen to 45% (the 12nd tunnel of corresponding LED drive chip 2), current scene is that white scene is in viewing area 28 (namely the driving dutycycle of viewing area 28 rises to 80% by 45%), when other are black, then the driving dutycycle of viewing area 36 is progressively risen to 45% (the 4th tunnel of corresponding LED drive chip 3), current scene is that white scene is in viewing area 36 (namely the driving dutycycle of viewing area 36 rises to 80% by 45%), when other are black, then the driving dutycycle of viewing area 44 is progressively risen to 45% (the 12nd tunnel of corresponding LED drive chip 3), current scene is that white scene is in viewing area 44 (namely the driving dutycycle of viewing area 44 rises to 80% by 45%), when other are black, then the driving dutycycle of viewing area 52 is progressively risen to 45% (the 4th tunnel of corresponding LED drive chip 4), current scene is that white scene is in viewing area 52 (namely the driving dutycycle of viewing area 52 rises to 80% by 45%), when other are black, then the driving dutycycle of viewing area 60 is progressively risen to 45% (the 12nd tunnel of corresponding LED drive chip 4), current scene is that white scene is in viewing area 60 (namely the driving dutycycle of viewing area 60 rises to 80% by 45%), when other are black, then the driving dutycycle of viewing area 68 is progressively risen to 45% (the 4th tunnel of corresponding LED drive chip 5), current scene is that white scene is in viewing area 68 (namely the driving dutycycle of viewing area 68 rises to 80% by 45%), when other are black, then the driving dutycycle of viewing area 76 is progressively risen to 45% (the 12nd tunnel of corresponding LED drive chip 5), current scene is that white scene is in viewing area 76 (namely the driving dutycycle of viewing area 76 rises to 80% by 45%), when other are black, then the driving dutycycle of viewing area 84 is progressively risen to 45% (the 4th tunnel of corresponding LED drive chip 6), current scene is that white scene is in viewing area 84 (namely the driving dutycycle of viewing area 84 rises to 80% by 45%), when other are black, then the driving dutycycle of viewing area 92 is progressively risen to 45% (the 12nd tunnel of corresponding LED drive chip 6), when the driving of last viewing area 92, the driving dutycycle of viewing area 96 rises to 80% by 45%.
Adopt with after upper type, due to the boundary effect in viewing area and the large motion white edge of contrast transport to next viewing area time, because LED before has bright half, after handover, relative to mode before, brightness variation range is little, because the perception of human eye is in certain scope, with regard to the change procedure of imperceptible LED significantly from dark to bright, enhance visual experience.
If what above method LED drive chip directly exported is electric current, be also same reason, if during black scene, required drive current is 10mA, and brightness required time the brightest is 130mA.During present image in Figure 12, then by the electric current of viewing area 12, 70mA (i.e. the half of later scene brightness) is risen to gradually by 10mA, and when moving to viewing area 20, viewing area 28, viewing area 36, viewing area 44, viewing area 52, viewing area 60, viewing area 68, viewing area 76, viewing area 84, during viewing area 92, also successively when current scene, the LED brightness of next viewing area is reached the half of maximal value, namely current scene is that white scene is in viewing area 20, when other are black, then the drive current of viewing area 28 is risen to 70mA (the 12nd tunnel of corresponding LED drive chip 2), current scene is that white scene is in viewing area 28 (namely the drive current of viewing area 28 rises to 130mA by 70mA), when other are black, then the drive current of viewing area 36 is risen to 70mA (the 4th tunnel of corresponding LED drive chip 3), current scene is that white scene is in viewing area 36 (namely the drive current of viewing area 36 rises to 130mA by 70mA), when other are black, then the drive current of viewing area 44 is risen to 70mA (the 12nd tunnel of corresponding LED drive chip 3), current scene is that white scene is in viewing area 44 (namely the drive current of viewing area 44 rises to 130mA by 70mA), when other are black, then the drive current of viewing area 52 is risen to 70mA (the 4th tunnel of corresponding LED drive chip 4), current scene is that white scene is in viewing area 52 (namely the drive current of viewing area 52 rises to 130mA by 70mA), when other are black, then the drive current of viewing area 60 is risen to 70mA (the 12nd tunnel of corresponding LED drive chip 4), current scene is that white scene is in viewing area 60 (namely the drive current of viewing area 60 rises to 130mA by 70mA), when other are black, then the drive current of viewing area 68 is risen to 70mA (the 4th tunnel of corresponding LED drive chip 5), current scene is that white scene is in viewing area 68 (namely the drive current of viewing area 68 rises to 130mA by 70mA), when other are black, then the drive current of viewing area 76 is risen to 70mA (the 12nd tunnel of corresponding LED drive chip 5), current scene is that white scene is in viewing area 76 (namely the drive current of viewing area 76 rises to 130mA by 70mA), when other are black, then the drive current of viewing area 84 is risen to 70mA (the 4th tunnel of corresponding LED drive chip 6), current scene is that white scene is in viewing area 84 (namely the drive current of viewing area 84 rises to 130mA by 70mA), when other are black, then the drive current of viewing area 92 is risen to 70mA (the 12nd tunnel of corresponding LED drive chip 6), when the driving of last viewing area 92, the drive current of viewing area 96 rises to 130mA by 70mA.
These are only the preferred embodiments of the present invention; not thereby its scope of the claims is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; directly or indirectly be used in the technical field that other are relevant, be all in like manner included in scope of patent protection of the present invention.
Claims (11)
1. a display packing for liquid crystal display, is characterized in that, the display packing of described liquid crystal display comprises the following steps:
Obtain the brightness value of each viewing area under current scene and later scene;
Calculate the luminance difference of each viewing area under current scene and later scene, and the size between more described luminance difference and setting threshold values;
When the described luminance difference of a certain viewing area is greater than described setting threshold values, control described a certain viewing area to show with median luminance value under current scene, the brightness value of a certain viewing area under later scene described in median luminance value < described in the brightness value L EssT.LTssT.LT of described a certain viewing area under current scene.
2. the display packing of liquid crystal display as claimed in claim 1, it is characterized in that, the brightness value of described a certain viewing area under current scene is the first brightness value, the brightness value of described a certain viewing area under later scene is the second brightness value, described each viewing area with described first brightness value display time for dim dark state, when showing with described second brightness value for illuminating state, the viewing area adjacent with described a certain viewing area shows with described second brightness value under current scene, shows under later scene with described first brightness value.
3. the display packing of liquid crystal display as claimed in claim 1, is characterized in that, calculate the luminance difference of each viewing area under current scene and later scene, and also comprises after the step of size between more described luminance difference and setting threshold values:
When the described luminance difference of a certain viewing area is less than described setting threshold values, controls described a certain viewing area and show with the brightness value of described a certain viewing area under current scene under current scene.
4. the display packing of liquid crystal display as claimed in claim 1, it is characterized in that, the step obtaining the brightness value of each viewing area under current scene and later scene comprises:
Digital signal processor sends the brightness data of each viewing area in current scene to controller;
Described controller receives each viewing area after the brightness data of current scene, the brightness data to each viewing area that described digital signal processor feedback reception arrives in current scene;
Compare at the brightness data of current scene and the brightness data of issued current scene in each viewing area of the feedback received by described digital signal processor;
When comparison result is consistent, described digital signal processor sends the brightness data of later scene to controller, described controller using each viewing area of finally receiving at the brightness data of current scene as the brightness value of each viewing area described under current scene;
Described controller receives each viewing area after the brightness data of later scene, the brightness data to each viewing area that described digital signal processor feedback reception arrives at later scene;
Compare at the brightness data of later scene and the brightness data of issued later scene in each viewing area of the feedback received by described digital signal processor;
When comparison result is consistent, described controller using each viewing area of finally receiving at the brightness data of later scene as the brightness value of each viewing area described under later scene.
5. the display packing of liquid crystal display as claimed in claim 4, it is characterized in that, each viewing area of the feedback received after the step that the brightness data of current scene and the brightness data of issued current scene are compared, also comprises by described digital signal processor:
When comparison result is inconsistent, described digital signal processor continues to send the brightness data of each viewing area in current scene to described controller;
Each viewing area of the feedback received after the step that the brightness data of later scene and the brightness data of issued later scene are compared, also comprises by described digital signal processor:
When comparison result is inconsistent, described digital signal processor continues to send the brightness data of each viewing area at later scene to described controller.
6. a liquid crystal display, is characterized in that, it comprises the digital signal processor of electric connection, controller, driver and display screen, and described controller comprises brightness value acquisition module, luminance difference computing module, drive control module:
Described digital signal processor is in order to send the brightness data of each viewing area under current scene and later scene;
Described brightness value acquisition module, in order to the brightness data of each viewing area under current scene and later scene, obtains the brightness value of each viewing area under current scene and later scene;
Described luminance difference computing module is in order to calculate the luminance difference of each viewing area under current scene and later scene, and the size between more described luminance difference and setting threshold values;
Described drive control module is in order to when the described luminance difference of a certain viewing area is greater than described setting threshold values, control the LED of display screen described in described driver drives, described a certain viewing area is shown under current scene, the brightness value of a certain viewing area under later scene described in median luminance value < described in the brightness value L EssT.LTssT.LT of described a certain viewing area under current scene with median luminance value.
7. liquid crystal display as claimed in claim 6, it is characterized in that, the brightness value of described a certain viewing area under current scene is the first brightness value, the brightness value of described a certain viewing area under later scene is the second brightness value, described each viewing area with described first brightness value display time for dim dark state, when showing with described second brightness value for illuminating state, the viewing area adjacent with described a certain viewing area shows with described second brightness value under current scene, shows under later scene with described first brightness value.
8. liquid crystal display as claimed in claim 6, it is characterized in that, described drive control module is also in order to when the described luminance difference of a certain viewing area is less than described setting threshold values, control the LED of display screen described in described driver drives, described a certain viewing area is shown with the brightness value of described a certain viewing area under current scene under current scene.
9. liquid crystal display as claimed in claim 6, it is characterized in that, described digital signal processor comprises brightness data sending module, brightness data recycling module, brightness data comparing module and data and sends control module, and described brightness value acquisition module comprises brightness data receiving element, brightness data feedback unit and brightness data pickup unit:
In order to there is the brightness data of each viewing area under current scene in described brightness data sending module;
Described brightness data receiving element is in order to receive the brightness data of each viewing area under current scene;
Each viewing area brightness data under current scene of described brightness data feedback unit in order to arrive to described brightness data recycling module feedback reception;
Described brightness data recycling module is in order to connect the brightness data of each viewing area under scene of feedback;
Described brightness data comparing module is in order to compare brightness data and each viewing area issued brightness data under current scene of each viewing area of the feedback received under current scene;
Described data send control module in order to when comparison result is consistent, control described brightness data sending module and send the brightness data of each viewing area under later scene;
Each viewing area brightness data brightness value as each viewing area under later scene under later scene of described brightness data pickup unit in order to will finally receive;
Described brightness data receiving element is also in order to receive the brightness data of each viewing area under later scene;
Each viewing area brightness data under later scene of described brightness data feedback unit also in order to arrive to described brightness data recycling module feedback reception;
Described brightness data recycling module is also in order to connect the brightness data of each viewing area under later scene of feedback;
Described brightness data comparing module is also in order to compare brightness data and each viewing area issued brightness data under later scene of each viewing area of the feedback received under later scene;
Described data send control module also in order to when comparison result is consistent, control described brightness data sending module and send the brightness data of each viewing area under follow-up scene;
Each viewing area brightness data brightness value as each viewing area under later scene under later scene of described brightness data pickup unit also in order to will finally receive.
10. liquid crystal indicator as claimed in claim 9, is characterized in that, described data send control module also in order to when comparison result is inconsistent, controls described brightness data sending module and continues to send the brightness data of each viewing area in corresponding scene.
11. liquid crystal indicators as claimed in claim 6, it is characterized in that, the viewing area of described each brightness viewing area corresponding to multiple LED, described driver comprises multiple driving chip of the LED driving setting quantity respectively, the brightness data input pin of driving chip described in one of them is connected with the brightness data output pin of described data-signal plate, the brightness data input pin of driving chip described in remaining is electrically connected with the brightness data output pin of adjacent driving chip successively, the brightness data input pin of the brightness data output pin and described digital signal processor that are positioned at last driving chip is connected, described controller is electrically connected with described multiple driving chip respectively, in order to obtain the brightness data of each viewing area under current scene and later scene in described multiple driving chip.
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