CN100523924C - Liquid crystal display device and method thereof - Google Patents
Liquid crystal display device and method thereof Download PDFInfo
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- CN100523924C CN100523924C CNB2006100832802A CN200610083280A CN100523924C CN 100523924 C CN100523924 C CN 100523924C CN B2006100832802 A CNB2006100832802 A CN B2006100832802A CN 200610083280 A CN200610083280 A CN 200610083280A CN 100523924 C CN100523924 C CN 100523924C
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Abstract
The invention relates to a liquid crystal display device and a method thereof. The liquid crystal display device is used for playing a first visual frame and a second visual frame of a video stream, and comprises an image control circuit, a pixel array and a visual frame comparison circuit, wherein the image control circuit receives the video stream to process the first visual frame and the second visual frame, the pixel array is electrically connected with the image control circuit, the image control circuit drives the pixel array to display the first visual frame, the visual frame comparison circuit receives the second visual frame and the first visual frame and compares the second visual frame with the first visual frame to output a visual frame comparison signal, and the image control circuit is electrically connected with the visual frame comparison circuit to receive the visual frame comparison signal to drive the pixel array to display the second visual frame. The liquid crystal display method is used for playing a first visual frame and a second visual frame of a video stream and comprises a processing step, a comparing step and a control step. The invention can avoid repeatedly driving the pixel array when the contents of the frames are the same, thereby reducing the power waste and achieving the effect of saving power.
Description
Technical field
The present invention relates to a kind of display device and method thereof, particularly relate to a kind of driving circuit of can regulating and drive the pixel array number of times, can avoid looking the frame content and still repeat to drive pixel array when identical, and can reduce power dissipation and the liquid crystal indicator and the method thereof that reach the power saving effect.
Background technology
Along with IT industry is flourish, all types of electronic products are popularized gradually, and the product of a new generation especially day also exquisite, with the display device of computer, traditional CRT display is owing to bulkyly replaced by compact liquid crystal indicator gradually.
Seeing also shown in Figure 1ly, is a block diagram of existing known liquid crystal indicator.Existing known liquid crystal indicator 1, mainly comprise a module 11 backlight and a display panels 12, module 11 backlight comprises a controller 111, one drive circuit 112 and a light source 113, controller 111 is the output voltage of control Driver Circuit 112 and output current adjusting the luminous intensity of light source 113, so that light source 113 is can stabilized uniform luminous.
This display panels 12, comprise an image control circuit 120 and a pixel array 123, image control circuit 120 comprises a video signal treatment circuit 121 and one drive circuit 122, pixel array 123 is to be formed on the display panels 12, driving circuit 122 comprises scanning linear driving circuit and data line driving circuit, and it is to be electrically connected between video signal treatment circuit 121 and the pixel array 123.
This video signal treatment circuit 11, be to receive a video streams #VIDEO from computer or antenna etc., it is that the frame of controlling among the video streams #VIDEO of respectively looking is play sequential, and can be to respectively looking the playback rate that frame carries out colour correction (Gamma Correction) and control video streams #VIDEO, so that after the electric crystal conducting of driving circuit 122 with pixel array 123, can correctly write the data of respectively looking frame liquid crystal storage capacitors, thereby the light that produced of the light source 113 of module backlight 11 passes video pictures correctly after the pixel array 123 to pixel array 123.
On the other hand, on display panels 12, sweep trace and data line are to be electrically connected between driving circuit 122 and the pixel array 123, yet, the stray capacitance of sweep trace and data line and stray resistance cause very serious load effect for driving circuit 122, therefore, driving circuit 122 must have high-output power and can be enough the electric crystal conducting of pixel array 123 correctly be write will look the frame data, thereby pixel array video picture correctly.
Yet, when showing static image, the frame content of looking that pixel array shows does not all have variation with the frame data of looking that the data line driving circuit writes, this moment, scanning linear driving circuit and data line driving circuit still discharged and recharged stray capacitance on pixel array and the circuit and stray resistance, thereby caused the waste of power.
This shows that above-mentioned existing liquid crystal indicator and method thereof obviously still have inconvenience and defective, and demand urgently further being improved in product structure, method and use.In order to solve the problem of above-mentioned existence, relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly, but do not see always that for a long time suitable design finished by development, and common product and method do not have appropriate structure and method to address the above problem, and this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how therefore how to found a kind ofly newly provides a kind of liquid crystal indicator that can address the above problem and driving circuit, real one of the current important research and development problem that belongs to, and also becoming the current industry utmost point needs improved target.
Because the defective that above-mentioned existing liquid crystal indicator and method thereof exist, the inventor is based on being engaged in this type of product design manufacturing abundant for many years practical experience and professional knowledge, and the utilization of cooperation scientific principle, actively studied innovation, in the hope of founding a kind of new liquid crystal indicator and method thereof, can improve general existing liquid crystal indicator and method thereof, make it have more practicality.Through constantly research, design, and after studying sample and improvement repeatedly, create the present invention who has practical value finally.
Summary of the invention
The objective of the invention is to, overcome the defective that existing liquid crystal indicator and method thereof exist, and a kind of new liquid crystal indicator and the method thereof that can regulate driving circuit driving pixel array number of times are provided, thereby be suitable for practicality more.
The object of the invention to solve the technical problems is to adopt following technical scheme to realize.According to a kind of liquid crystal indicator that the present invention proposes, be to look frame and one second and look frame in order to play one first of video signal stream, this liquid crystal indicator comprises: an image control circuit is to receive this video signal to flow to handle this and first look frame and this second and look frame; One pixel array is to electrically connect this image control circuit, and this image control circuit is to drive this pixel array to show that this first looks frame; And one look the frame comparator circuit, be to receive this second to look frame and this first and look frame, itself and relatively this second is looked frame and first looks frame and look relatively signal of frame to export one with this, wherein this image control circuit be electric connection this look the frame comparator circuit and look frame comparison signal and drive this pixel array and show that this second looks frame to receive this.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid liquid crystal indicator, wherein when this second when looking frame and this first to look frame being different, this image control circuit is to drive this pixel array and show that this second looks frame according to looking frame comparison signal, when this second look frame with this first when to look frame be identical, this image control circuit is to look frame display rate (frame rate) and second look frame to ignore this according to looking frame comparison signal adjustment one.
Aforesaid liquid crystal indicator, wherein said image control circuit comprises: a video signal treatment circuit is to receive this video signal stream first to look frame and this second and look frame to handle this; And one drive circuit, be to electrically connect this video signal treatment circuit treated first to look frame to receive this, it also electrically connects this pixel array and shows that to drive this pixel array this first looks frame; Wherein this driving circuit is to receive this to look frame comparison signal and show that to drive this pixel array this second looks frame.
Aforesaid liquid crystal indicator, wherein said driving circuit is one to scan line drive circuit, relatively signal is punctual at one first when this looks frame, this driving circuit is that a plurality of scanning impulse signals of output to this pixel array second is looked frame to show this, when this look frame relatively signal one second punctual, this driving circuit is to suspend the described scanning impulse signal of output to this pixel array.
Aforesaid liquid crystal indicator, wherein said driving circuit is a data line driving circuit, relatively signal is punctual at one first when this looks frame, this driving circuit is that a plurality of document signals of output to this pixel array second is looked frame to show this, when this look frame relatively signal one second punctual, this driving circuit is to suspend the described document signal of output to this pixel array.
Aforesaid liquid crystal indicator, wherein said image control circuit comprises: a video signal treatment circuit is to receive this video signal stream first to look frame and this second and look frame to handle this; And one drive circuit, be to electrically connect this video signal treatment circuit treated first to look frame to receive this, it also electrically connects this pixel array and shows that to drive this pixel array this first looks frame; Wherein this video signal treatment circuit be receive this look frame relatively signal with output one-period signal to this driving circuit, use driving this pixel array and show that this second looks frame.
Aforesaid liquid crystal indicator, wherein relatively signal is punctual at one first when this looks frame, to be this period signal of output show that to drive this pixel array this second looks frame to this driving circuit to this video signal treatment circuit, when this look frame relatively signal one second punctual, this video signal treatment circuit is to suspend to export this period signal to this driving circuit to and drive this pixel array to suspend.
Aforesaid liquid crystal indicator, it more comprises an on-off circuit, is to electrically connect this to look the frame comparator circuit, it is to be controlled by this to look frame comparison signal to transmit this period signal to this driving circuit.
Aforesaid liquid crystal indicator, wherein said driving circuit are one to scan line drive circuit, and this period signal is a scanning linear start signal or a scanning linear time pulse signal.
Aforesaid liquid crystal indicator, wherein said driving circuit are data line driving circuits, and this period signal is a data line start signal or a data line time pulse signal.
Aforesaid liquid crystal indicator, wherein said video signal treatment circuit is second to look frame and export a document signal according to this, relatively signal is punctual at one first when this looks frame, to be this document signal of output show that to drive this pixel array this second looks frame to this driving circuit to this video signal treatment circuit, when this look frame relatively signal one second punctual, this video signal treatment circuit is to suspend this document signal of output to this driving circuit to drive this pixel array to suspend.
Aforesaid liquid crystal indicator, it more comprises an on-off circuit, is to electrically connect this to look the frame comparator circuit, it is to be controlled by this to look frame comparison signal to transmit this document signal to this driving circuit.
Aforesaid liquid crystal indicator, the wherein said frame comparator circuit of looking is to comprise: a comparer is that relatively this second is looked frame and first look in the frame corresponding picture element to export relatively signal of a picture element with this; One reverse brake is to electrically connect this comparer to compare signal with reverse this picture element; One or lock, be to electrically connect this reverse brake; And a D type flip-flop, be electrically connect should or lock look relatively signal of frame to export this, wherein this look frame comparison signal be feedback to should or lock to carry out exclusive disjunction with this reverse picture element comparison signal.
The object of the invention to solve the technical problems also realizes by the following technical solutions.A kind of liquid crystal display method according to the present invention's proposition, be to look frame and one second and look frame in order to play one first of video signal stream, this liquid crystal display method may further comprise the steps: a treatment step is to handle this first to look frame and drive a pixel array by one drive circuit and first look frame with what show that this has handled; One comparison step is that relatively this second is looked frame and this first and look frame and look relatively signal of frame to export one; And a controlled step, be to look frame comparison signal according to this to control this driving circuit and drive this pixel array and second look frame to show this.
The object of the invention to solve the technical problems also can be applied to the following technical measures to achieve further.
Aforesaid liquid crystal display method, wherein said controlled step be when this second look frame with this first when to look frame be identical, controlling this driving circuit drives this pixel array and second looks frame to show this, when this second when looking frame and this first to look frame being different, this controlled step is to adjust one to look frame display rate (framerate) and second look frame to ignore this.
Aforesaid liquid crystal display method, wherein said driving circuit is one to scan line drive circuit, relatively signal is punctual at one first when this looks frame, this controlled step is that this driving circuit of control is exported a plurality of scanning impulse signals to this pixel array and second looked frame to show this, when this look frame relatively signal one second punctual, this controlled step is that this driving circuit of control suspends the described scanning impulse signal of output to this pixel array.
Aforesaid liquid crystal display method, wherein said driving circuit is a data line driving circuit, relatively signal is punctual at one first when this looks frame, this controlled step is that this driving circuit of control is exported a plurality of document signals to this pixel array and second looked frame to show this, when this look frame relatively signal one second punctual, this controlled step is that this driving circuit of control suspends the described document signal of output to this pixel array.
The present invention compared with prior art has tangible advantage and beneficial effect.By above technical scheme as can be known, major technique of the present invention thes contents are as follows:
In order to achieve the above object, according to a kind of liquid crystal indicator of the present invention is to look frame and one second and look frame in order to play one first of video signal stream, this liquid crystal indicator comprises an image control circuit, one pixel array and one is looked the frame comparator circuit, to be receiving video stream look frame and second and look frame to handle first image control circuit, pixel array is to electrically connect image control circuit, image control circuit is to drive pixel array to show that first looks frame, look the frame comparator circuit and be and receive second and look frame and first and look frame, it also relatively second is looked frame and first and looks frame and look relatively signal of frame to export one, and wherein image control circuit is to electrically connect to look the frame comparator circuit and look frame comparison signal with reception and drive pixel array demonstration second and look frame.
In addition, in order to achieve the above object, according to a kind of liquid crystal display method of the present invention is to look frame and one second and look frame in order to play one first of video signal stream, this liquid crystal display method comprises a treatment step, a comparison step and a controlled step, wherein treatment step be handle first look frame and by one drive circuit drive a pixel array with show handled first look frame, comparison step is that comparison second is looked frame and first and looked frame and look relatively signal of frame to export one, and controlled step is to drive pixel array to show that second looks frame according to looking frame comparison signal control Driver Circuit.
By technique scheme, liquid crystal indicator of the present invention and method thereof have following advantage at least: from the above, because according to liquid crystal indicator of the present invention and method, be that comparison second is looked frame and first and looked frame and drive pixel array with the control image control circuit and show that second looks frame, thereby can avoid looking the frame content and still repeat to drive pixel array when identical, use and can reduce power dissipation and reach less electricity consumption.
In sum, the invention relates to a kind of liquid crystal indicator and method thereof.This liquid crystal indicator is to look frame and one second and look frame in order to play one first of video signal stream, this liquid crystal indicator comprises an image control circuit, one pixel array and one is looked the frame comparator circuit, to be receiving video stream look frame and second and look frame to handle first image control circuit, pixel array is to electrically connect image control circuit, image control circuit is to drive pixel array to show that first looks frame, look the frame comparator circuit and be and receive second and look frame and first and look frame, it also relatively second is looked frame and first and looks frame and look relatively signal of frame to export one, and wherein image control circuit is to electrically connect to look the frame comparator circuit and look frame comparison signal with reception and drive pixel array demonstration second and look frame.The present invention can regulate driving circuit and drive the pixel array number of times, can reduce power dissipation, and can reach less electricity consumption.It has above-mentioned plurality of advantages and practical value, no matter bigger improvement is all arranged on product structure, method or function, obvious improvement is arranged technically, and produced handy and practical effect, and more existing liquid crystal indicator and method thereof have the outstanding effect of enhancement, thereby being suitable for practicality more, and having the extensive value of industry, really is a new and innovative, progressive, practical new design.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, and for above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, below especially exemplified by preferred embodiment, and conjunction with figs., be described in detail as follows.
Description of drawings
Fig. 1 is a block diagram that has known liquid crystal indicator now.
Fig. 2 A and Fig. 2 B are the block diagrams according to the liquid crystal indicator of preferred embodiment of the present invention.
Fig. 3 A to Fig. 3 C is the block diagram according to the liquid crystal indicator of preferred embodiment of the present invention.
Fig. 4 is a block diagram of looking the frame comparator circuit among Fig. 3 A.
Fig. 5 is a block diagram of on-off circuit among Fig. 3.
Fig. 6 is the process flow diagram according to the liquid crystal display method of preferred embodiment of the present invention.
1: liquid crystal indicator 11: module backlight
111: controller 112: driving circuit
113: light source 12: display panels
121: video signal treatment circuit 122: driving circuit
123: pixel array 2: liquid crystal indicator
20: image control circuit 21,21 ': the video signal treatment circuit
22: pixel array 23,23 ': driving circuit
231: scan line drive circuit 232: the data line driving circuit
24: look frame comparator circuit 241: comparer
242: reverse brake 243: or lock
244:D type flip-flop 25: on-off circuit
251-255: and lock F1: first looks frame
F2: second looks frame #CLKD: the data line time pulse signal
#CLKS: sweep trace time pulse signal #DATA, #DATA ': document signal
#FC: look relatively signal #PC of frame: picture element is signal relatively
#SPD: data line start signal #SPS: scanning linear start signal
#SS: scanning impulse signal #VIDEO: video streams
S01-S03: the step of liquid crystal display method
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention, below in conjunction with accompanying drawing and preferred embodiment, to liquid crystal indicator and its embodiment of method, structure, method, step, feature and the effect thereof that foundation the present invention proposes, describe in detail as after.
Seeing also shown in Fig. 2 A and Fig. 2 B, is the block diagram according to the liquid crystal indicator of preferred embodiment of the present invention.Shown in Fig. 2 A, according to a kind of liquid crystal indicator 2 of preferred embodiment of the present invention is to look frame F1 and one second and look frame F2 in order to play one first of video signal stream #VIDEO, wherein second look frame F2 and first look time one of frame F1 and look frame, this liquid crystal indicator 2, comprise an image control circuit 20, one pixel array 22 and one is looked frame comparator circuit 24, to be receiving video stream #VIDEO look frame F1 and second and look frame F2 to handle first image control circuit 20, pixel array 22 is to electrically connect image control circuit 20, image control circuit 20 is to drive pixel array 22 to show that first looks frame F1, look frame comparator circuit 24 and be and receive second and look frame F2 and first and look frame F1, it also relatively second is looked frame F2 and first and looks frame F1 and look relatively signal #FC of frame to export one, and wherein image control circuit 20 is to electrically connect to look frame comparator circuit 24 and look frame comparison signal #FC with reception and drive pixel array 22 demonstrations second and look frame F2.
From the above, look frame F2 and first and look the content of frame F1 when different when second, image control circuit 20 be according to look frame relatively signal #FC drive pixel array 22, and second data content of looking frame F2 write to pixel array 22 show that to drive pixel array 22 second looks frame F2.Look the content of frame F1 when identical if second looks frame F2 and first, image control circuit 20 is not drive pixel array 22 according to looking frame comparison signal #FC, thereby pixel array 22 is not updated and continues to show that first looks frame F1, can reduce the power consumption that drives pixel array 22 by this, and can show correctly that second looks the content of frame F2.
In this special instruction is that image control circuit 20 is looked frame display rate (frame rate) to ignore the frame of looking of picture repetition, to use the number of times that reaches minimizing driving pixel array 22 and can show identical picture according to looking frame comparison signal #FC adjustment one.For example first look frame F1 after, compare second and look frame F2 and first and look the identical and output of the content of frame F1 and look relatively signal #FC of frame when looking frame comparator circuit 24, image control circuit 20 is will look the frame display rate and downgrade and do not play second and look frame F2 according to looking frame comparison signal #FC, therefore, pixel array 22 is still play the image (first looks frame F1) of identical content, but the number of times that drives pixel array 22 reduces, thereby can reach less electricity consumption.
In the present embodiment, image control circuit 20 comprises a video signal treatment circuit 21 and one drive circuit 23, to be receiving video stream #VIDEO look frame F1 and second and look frame F2 to handle first video signal treatment circuit 21, driving circuit 23 be electrically connect video signal treatment circuit 21 with receive handled first look frame F1, it also electrically connects pixel array 22 and shows that to drive pixel array 22 first looks frame F1.
Driving circuit 23 is to receive to look frame comparison signal #FC and show that to drive pixel array 22 second looks frame F2, therefore, look frame F2 and first and look the content of frame F1 when identical when second, driving circuit 23 is not drive pixel array 22 and show that second looks frame F2 according to looking frame comparison signal #FC.On the other hand, middle as shown dotted line A, look frame comparison signal #FC and also can input to video signal treatment circuit 21 but not driving circuit 23, video signal treatment circuit 21 be receive look frame relatively signal #FC with output one-period signal to driving circuit 23, use allowing driving circuit 23 drive pixel arrays 22 to show that second looks frame F2.These period signals can be scanning linear start signal #SPS, sweep trace time pulse signal #CLKS, data line start signal #SPD and data line time pulse signal #CLKD.Driving circuit 23 can comprise scan line drive circuit and data line driving circuit.
Moreover, shown in Fig. 2 B, itself and Fig. 2 A difference are, first looks frame F1 and second looks frame F2 via being temporary in the video signal treatment circuit 21 after the processing, look frame comparator circuit 24 and be electrically connecting video signal treatment circuit 21 and look frame F1 and second and look frame F2, and relatively first look frame F1 and second and look frame F2 and look frame comparison signal #FC with output to receive first.
Seeing also shown in Fig. 3 A to Fig. 3 C, is the block diagram according to the liquid crystal indicator of preferred embodiment of the present invention.As shown in Figure 3A, liquid crystal indicator 2 more comprises an on-off circuit 25, and driving circuit 23 is to comprise scan line drive circuit 231 and data line driving circuit 232.
Video signal treatment circuit 21 is a plurality of period signals of output, these period signals are to be sent to driving circuit 23 via on-off circuit 25, and these period signals are scanning linear start signal #SPS, sweep trace time pulse signal #CLKS, data line start signal #SPD and data line time pulse signal #CLKD.Wherein, video signal treatment circuit 21 be output scanning linear start signal #SPS and sweep trace time pulse signal #CLKS to scan line drive circuit 231, it also exports data line start signal #SPD and data line time pulse signal #CLKD to data line driving circuit 232.In addition, video signal treatment circuit 21 and export document signal #DATA in regular turn to data line driving circuit 232 according to the sequential (timing) of respectively looking frame and coordination information line time pulse signal CLKD of video signal stream #VIDEO.
Look frame comparator circuit 24 and be comparison second and look frame F2 and first and look the frame of looking that these two front and back of frame F1 link to each other whether content is identical, look the frame content when inequality when these two, it is to be located at one first standard with looking frame comparison signal #FC; Look the frame content when identical when these two, it is to be located at one second standard with looking frame comparison signal #FC.Look frame comparison signal #FC and be gauge tap circuit 25 and whether transmit period signal that video signal treatment circuit 21 exported and document signal #DATA to data line driving circuit 232 or scan line drive circuit 231.
Relatively signal #FC is punctual at first when looking frame, looking frame comparator circuit 24 is that 25 conductings of gauge tap circuit are to transmit these period signals and document signal #DATA respectively to data line driving circuit 232 or scan line drive circuit 231, scan line drive circuit 231 is to operate in sweep trace time pulse signal #CLKS, its be receive and displacement sweep trace start signal #SPS with in regular turn at different clock pulse cycle output scanning pulse signal #SS to each sweep trace, use the electric crystal that respectively lists in the conducting pixel array 22 in regular turn.
Data line driving circuit 232 is to operate in data line time pulse signal #CLKD, its be receive and displacement data line start signal #SPD in the different clock pulse cycles document signal #DATA is taken a sample in regular turn, and on each data line, export document signal #DATA ' simultaneously, use with document signal #DATA ' by in the pixel array 22 the electric crystal of conducting write to the liquid crystal storage capacitors so that the light source of liquid crystal indicator 2 passes after the pixel array 22 frame of looking after can display update.
Relatively signal #FC is punctual at second when looking frame, looking frame comparator circuit 24 is that the 25 not conductings of gauge tap circuit are to allow these period signals and document signal #DATA halt input to scan line drive circuit 231 or data line driving circuit 232, therefore, scan line drive circuit 231 or data line driving circuit 232 are to suspend to drive pixel array 22, the liquid crystal storage capacitors of pixel array 22 is not updated, so that the light source of liquid crystal indicator 2 passes the frame of looking before still can showing after the pixel array 22.
Playing sequence from image, look frame F1 for first, video signal treatment circuit 21 is to look frame F1 output document signal #DATA according to first, if first looks frame F1 look frame content last with it when inequality, then looking frame comparator circuit 24 is that period signal and the document signal #DATA that control video signal treatment circuit 21 is exported inputs to scan line drive circuit 231 or data line driving circuit 232 respectively, document signal #DATA ' writes to via data line driving circuit 232 after the pixel array 22, and liquid crystal indicator 2 is to show that first looks frame F1.
Same similarly, if second look frame F2 look frame (first look frame F1) last with it when content is inequality, via aforesaid update mode, this liquid crystal indicator 2 is to show that second looks frame F2.Yet if second look frame F2 and its last frame (first looks frame F1) of looking when content is identical, look frame comparator circuit 24 and be these period signals of control and document signal #DATA halt input to scan line drive circuit 231 or data line driving circuit 232, therefore, liquid crystal indicator 2 is to show that first looks the image that frame F1 or first looks the forward sight frame of frame F1, whole second looks frame F2 can be described as the demonstration that is left in the basket, and looks the frame display speed and also downgrades.
In addition, liquid crystal on pixel array 22 solidifies, look frame comparator circuit 24 and be may command and look frame comparison signal #FC and continue in the time of second standard, but thereby positive drive circuit 23 with general function mode and cooperate the type of drive of reversal of poles to upgrade the liquid crystal storage capacitors of pixel array 22.
Moreover, shown in Fig. 3 B, itself and Fig. 3 A difference are that on-off circuit 25 can be comprised or be integrated in the video signal treatment circuit 21 ', and on-off circuit 25 is whether to export driving circuit 23 to according to the output signal of looking frame comparison signal #FC control video signal treatment circuit 21.Therefore, relatively signal #FC is punctual at first when looking frame, video signal treatment circuit 21 is that these period signals of output to driving circuit 23 shows that to drive pixel array 22 second looks frame F2, when look frame relatively signal #FC second punctual, video signal treatment circuit 21 is to suspend these period signals of output to driving circuit 23 to drive pixel array 22 to suspend.
In addition, shown in Fig. 3 C, itself and Fig. 3 A difference are, on-off circuit 25 can be comprised or be integrated in the driving circuit 23 ', and on-off circuit 25 is whether to export scan line drive circuit 231 or data line driving circuit 232 to according to the output signal of looking frame comparison signal #FC control video signal treatment circuit 21.Therefore, relatively signal #FC is punctual at first when looking frame, scan line drive circuit 231 and data line driving circuit 232 be respectively output scanning pulse signal #SS and document signal #DATA ' to pixel array 22 to show that second looks frame F2, when look frame relatively signal #FC second punctual, scan line drive circuit 231 and data line driving circuit 232 are to suspend output scanning pulse signal #SS and document signal #DATA ' respectively to pixel array 22.
Seeing also shown in Figure 4ly, is a block diagram of looking the frame comparator circuit among Fig. 3 A.This looks frame comparator circuit 24, comprise a comparer 241, one reverse brake 242, one or a lock 243 and a D type flip-flop 244, this comparer 241 is that comparison second is looked frame F2 and first and looked in the frame F1 corresponding picture element with output picture element signal #PC relatively, this reverse brake 242 is to electrically connect comparer 241 to compare signal #PC with reverse picture element, this or lock 243 are to electrically connect reverse brake 242, this D type flip-flop 244 is that electric connection or lock 243 are looked relatively signal #FC of frame with output, wherein look frame comparison signal #FC and be feedback to or lock 243 to carry out exclusive disjunction with reverse picture element comparison signal #PC, thus, as long as comparer 241 compares second and looks frame F2 and first and look frame F1 when inequality, it is that picture element comparison signal #PC is made as low level, picture element relatively signal #PC will trigger D type flip-flop 244 through reverse brake 242 after oppositely, thereby D type flip-flop 244 is to write down to look frame comparison signal #FC in high levels.
Seeing also shown in Figure 5ly, is a block diagram of on-off circuit among Fig. 3.On-off circuit 25 is to comprise a plurality of and lock 251-255, scanning linear start signal #SPS, sweep trace time pulse signal #CLKS, data line start signal #SPD and data line time pulse signal #CLKD input to respectively and lock 251-254, document signal #DATA inputs to and lock 255, looking frame comparison signal #FC is to input to respectively to reach lock 251-255, and respectively reaching lock 251-255 is to export scanning linear driving circuit 232 or data line driving circuit 232 respectively to.
In the present embodiment, first standard is high levels (numerical value 1), second standard is low level (numerical value 0), when look frame relatively signal #FC first punctual, the period signal that video signal treatment circuit 21 is exported and document signal #DATA are reached lock 251-255 and are sent to scanning linear driving circuit 232 or data line driving circuit 232 respectively.The output that reaches lock 251-255 is all low level on time at second when looking frame comparison signal #FC, and these period signals and document signal #DATA end in and lock 251-255.
Seeing also shown in Figure 6ly, is the process flow diagram according to the liquid crystal display method of preferred embodiment of the present invention.According to a kind of liquid crystal display method of preferred embodiment of the present invention is to look frame and one second and look frame in order to play one first of video signal stream, and this liquid crystal display method comprises a treatment step S01, a comparison step S02 and a controlled step S03, wherein:
This treatment step S01, be handle first look frame and by one drive circuit drive a pixel array with show handled first look frame;
This comparison step S02 is that comparison second is looked frame and first and looked frame and look relatively signal of frame to export one;
This controlled step S03 is to drive pixel array to show that second looks frame according to looking frame comparison signal control Driver Circuit.
Because the liquid crystal display method of present embodiment is the liquid crystal indicator 2 that can be applicable among the earlier figures 2A to Fig. 5, and has identical functions and effect, and carefully the embodiment of portion also is discussed in the previous embodiment in detail, so repeat no more.
In sum, because according to liquid crystal indicator of the present invention and method, be that comparison second is looked frame and first and looked frame and drive pixel array with the control image control circuit and show that second looks frame, thereby can avoid looking the frame content and still repeat to drive pixel array when identical, use and can reduce power dissipation and reach less electricity consumption.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention, any those skilled in the art, in not breaking away from the technical solution of the present invention scope, when the method that can utilize above-mentioned announcement and technology contents are made a little change or be modified to the equivalent embodiment of equivalent variations, in every case be the content that does not break away from technical solution of the present invention, according to technical spirit of the present invention to any simple modification that above embodiment did, equivalent variations and modification all still belong in the scope of technical solution of the present invention.
Claims (15)
1, a kind of liquid crystal indicator is to look frame and one second and look frame in order to play one first of video signal stream, it is characterized in that this liquid crystal indicator comprises:
One image control circuit is to receive this video signal stream first to look frame and this second and look frame to handle this;
One pixel array is to electrically connect this image control circuit, and this image control circuit is to drive this pixel array to show that this first looks frame; And
One looks the frame comparator circuit, be to receive this second to look frame and this first and look frame, itself and relatively this second is looked frame and first looks frame and look frame comparison signal to export one with this, wherein this image control circuit is to electrically connect this to look the frame comparator circuit and look relatively signal of frame to receive this, when this second when looking frame and this first to look frame being different, this image control circuit is to look frame comparison signal according to this to drive this pixel array and show that this second looks frame, when this second look frame with this first when to look frame be identical, this image control circuit is to look frame comparison signal adjustment one according to this to look the frame display rate and second look frame to ignore this, and shows that this first looks frame.
2, liquid crystal indicator according to claim 1 is characterized in that wherein said image control circuit comprises:
One video signal treatment circuit is to receive this video signal stream first to look frame and this second and look frame to handle this; And
One drive circuit is to electrically connect this video signal treatment circuit treated first to look frame to receive this, and it also electrically connects this pixel array and shows that to drive this pixel array this first looks frame;
Wherein this driving circuit is to receive this to look frame comparison signal and show that to drive this pixel array this second looks frame.
3, liquid crystal indicator according to claim 2, it is characterized in that wherein said driving circuit is the one scan line drive circuit, relatively signal is punctual at one first when this looks frame, this driving circuit is that a plurality of scanning impulse signals of output to this pixel array second is looked frame to show this, when this look frame relatively signal one second punctual, this driving circuit is to suspend the described scanning impulse signal of output to this pixel array.
4, liquid crystal indicator according to claim 2, it is characterized in that wherein said driving circuit is a data line driving circuit, relatively signal is punctual at one first when this looks frame, this driving circuit is that a plurality of document signals of output to this pixel array second is looked frame to show this, when this look frame relatively signal one second punctual, this driving circuit is to suspend the described document signal of output to this pixel array.
5, liquid crystal indicator according to claim 1 is characterized in that wherein said image control circuit comprises:
One video signal treatment circuit is to receive this video signal stream first to look frame and this second and look frame to handle this; And
One drive circuit is to electrically connect this video signal treatment circuit treated first to look frame to receive this, and it also electrically connects this pixel array and shows that to drive this pixel array this first looks frame;
Wherein this video signal treatment circuit be receive this look frame relatively signal with output one-period signal to this driving circuit, use driving this pixel array and show that this second looks frame.
6, liquid crystal indicator according to claim 5, it is characterized in that wherein relatively signal is punctual at one first when this looks frame, to be this period signal of output show that to drive this pixel array this second looks frame to this driving circuit to this video signal treatment circuit, when this look frame relatively signal one second punctual, this video signal treatment circuit is to suspend to export this period signal to this driving circuit to and drive this pixel array to suspend.
7, liquid crystal indicator according to claim 6 is characterized in that it more comprises an on-off circuit, is to electrically connect this to look the frame comparator circuit, and it is to be controlled by this to look frame comparison signal to transmit this period signal to this driving circuit.
8, liquid crystal indicator according to claim 6 is characterized in that wherein said driving circuit is the one scan line drive circuit, and this period signal is one scan line start signal or one scan line time pulse signal.
9, liquid crystal indicator according to claim 6 is characterized in that wherein said driving circuit is a data line driving circuit, and this period signal is a data line start signal or a data line time pulse signal.
10, liquid crystal indicator according to claim 6, it is characterized in that wherein said video signal treatment circuit is second to look frame and export a document signal according to this, relatively signal is punctual at one first when this looks frame, to be this document signal of output show that to drive this pixel array this second looks frame to this driving circuit to this video signal treatment circuit, when this look frame relatively signal one second punctual, this video signal treatment circuit is to suspend this document signal of output to this driving circuit to drive this pixel array to suspend.
11, liquid crystal indicator according to claim 10 is characterized in that it more comprises an on-off circuit, is to electrically connect this to look the frame comparator circuit, and it is to be controlled by this to look frame comparison signal to transmit this document signal to this driving circuit.
12, liquid crystal indicator according to claim 1 is characterized in that the wherein said frame comparator circuit of looking comprises:
One comparer is that relatively this second is looked frame and first look in the frame corresponding picture element to export relatively signal of a picture element with this;
One reverse brake is to electrically connect this comparer to compare signal this picture element comparison signal is oppositely produced a reverse picture element;
One or lock, be to electrically connect this reverse brake; And
One D type flip-flop, be electrically connect should or lock look relatively signal of frame to export this, wherein this look frame comparison signal be feedback to should or lock to carry out exclusive disjunction with this reverse picture element comparison signal.
13, a kind of liquid crystal display method is to look frame and one second and look frame in order to play one first of video signal stream, it is characterized in that this liquid crystal display method may further comprise the steps:
One treatment step is to handle this first to look frame and drive a pixel array by one drive circuit and first look frame with what show that this has handled;
One comparison step is that relatively this second is looked frame and this first and look frame and look relatively signal of frame to export one; And
One controlled step is to look frame comparison signal according to this to control this driving circuit and drive this pixel array,
Wherein when this second when looking frame and this first to look frame being different, this image control circuit is to look frame comparison signal according to this to drive this pixel array and show that this second looks frame, when this second look frame with this first when to look frame be identical, this image control circuit is to look frame comparison signal adjustment one according to this to look the frame display rate and second look frame to ignore this, and shows that this first looks frame.
14, liquid crystal display method according to claim 13, it is characterized in that wherein said driving circuit is the one scan line drive circuit, relatively signal is punctual at one first when this looks frame, this controlled step is that this driving circuit of control is exported a plurality of scanning impulse signals to this pixel array and second looked frame to show this, when this look frame relatively signal one second punctual, this controlled step is that this driving circuit of control suspends the described scanning impulse signal of output to this pixel array.
15, liquid crystal display method according to claim 13, it is characterized in that wherein said driving circuit is a data line driving circuit, relatively signal is punctual at one first when this looks frame, this controlled step is that this driving circuit of control is exported a plurality of document signals to this pixel array and second looked frame to show this, when this look frame relatively signal one second punctual, this controlled step is that this driving circuit of control suspends the described document signal of output to this pixel array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100832802A CN100523924C (en) | 2006-05-31 | 2006-05-31 | Liquid crystal display device and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100832802A CN100523924C (en) | 2006-05-31 | 2006-05-31 | Liquid crystal display device and method thereof |
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| CN101082712A CN101082712A (en) | 2007-12-05 |
| CN100523924C true CN100523924C (en) | 2009-08-05 |
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| CNB2006100832802A Expired - Fee Related CN100523924C (en) | 2006-05-31 | 2006-05-31 | Liquid crystal display device and method thereof |
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| CN109270979B (en) * | 2018-09-19 | 2020-02-07 | 西安电子工程研究所 | Method for reducing driving power of passive digital phase shifter driving circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040183768A1 (en) * | 2003-03-20 | 2004-09-23 | Asahi Yamato | Liquid crystal display device and method for driving the same |
| CN1545082A (en) * | 2003-11-28 | 2004-11-10 | 友达光电股份有限公司 | Apparatus and method for improving gamma curve separation |
| US20050062711A1 (en) * | 2003-05-01 | 2005-03-24 | Genesis Microchip Inc. | Using packet transfer for driving LCD panel driver electronics |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040183768A1 (en) * | 2003-03-20 | 2004-09-23 | Asahi Yamato | Liquid crystal display device and method for driving the same |
| US20050062711A1 (en) * | 2003-05-01 | 2005-03-24 | Genesis Microchip Inc. | Using packet transfer for driving LCD panel driver electronics |
| CN1545082A (en) * | 2003-11-28 | 2004-11-10 | 友达光电股份有限公司 | Apparatus and method for improving gamma curve separation |
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| CN101082712A (en) | 2007-12-05 |
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