Background technology
Generally all there is the image ghost phenomena in known liquid crystal indicator, and this ghost phenomena is because have in the liquid crystal capacitance of each pixel due to residual charge do not discharge.Particularly LCD can residually have electric charge in liquid crystal capacitance usually when shutdown, and causes the generation of power-off ghost shadow picture.Simultaneously, if these electric charges can't be before activating LCD get rid of fully next time, can make that promptly display is opened again after, display panels can produce the phenomenon of of short duration flicker.In addition, if the bias variations of the common electrode (Vcom) of the liquid crystal capacitance of LCD TV and when changing the accurate position of common voltage, also can produce scintillation.So, how to get rid of the residual charge in the liquid crystal capacitance, to prevent the phenomenon of film flicker and power-off ghost shadow picture,, truly have very significant effects for the quality-improving of LCD.
The TaiWan, China patent of prior art is for I253037 number to propose a kind of LCD with film flicker and ghost improvement; Comprise a display panels, a panel power supply unit, a Video Controller and time schedule controller, wherein display panels is to have a plurality of liquid crystal capacitances with display frame.The panel power supply unit is the required power supply of supply display panels.Video Controller is the image content of control input display panels.Time schedule controller is to be connected with Video Controller and display panels respectively, with the sequence of operations of control of video controller and display panels.Its running program is as shown in Figure 1, and being provides a preset picture to display panels, so that the residual charge snap-out release of liquid crystal capacitance after the liquid crystal display appliance mains switch is closed.
Aforesaid prior art only after power switch is closed, carries out the snap-out release of residual charge, and can't solve film flicker and power-off ghost shadow picture phenomenon when normal demonstration or standby.Because LCD display is when ghost takes place, it can appear at some fixing positions usually, and therefore, the present invention proposes a kind of mode with the picture fast offset, makes that the ghost state on the fixed position can be eliminated, to solve ghost phenomena.Simultaneously, the generation of ghost is also relevant with driving voltage, and therefore, the present invention also proposes a kind of to change the mode that Vcom voltage reduces driving voltage simultaneously, with of the influence of reduction electric field to liquid crystal molecule, and then the problem of solution ghost.
Summary of the invention
For solving the problem of prior art; The present invention provides a kind of liquid crystal indicator and method of improving film flicker and picture ghost; Comprise that one has the liquid crystal panel of n pixel and the Video Controller of a may command liquid crystal panel displaying contents; The Video Controller of liquid crystal indicator be with p=n-m, p=n+m, p=n (n>>m) individual pixel shows a normal pictures, and uses normal pictures back and forth between p and n pixel by Video Controller.
Therefore, fundamental purpose of the present invention is to provide a kind of liquid crystal indicator that improves film flicker and picture ghost that has, and overcomes this problem through the software in application end.
Secondary objective of the present invention is to provide a kind of the have film flicker that improves liquid crystal indicator and the method for picture ghost, overcomes this problem through the software in application end.
A purpose more of the present invention is to provide a kind of liquid crystal indicator that improves film flicker and picture ghost that has, and it can prolong the panel life-span.
Another object of the present invention is to provide a kind of the have film flicker that improves liquid crystal indicator and the method for picture ghost, it can prolong the panel life-span.
In view of the above; The present invention provides a kind of liquid crystal indicator that improves film flicker and picture ghost that has; Comprise that one has the liquid crystal panel of n pixel and the Video Controller of a may command liquid crystal panel displaying contents; Liquid crystal indicator be characterised in that Video Controller be with p=n-m, p=n+m, p=n (n>>m) individual pixel shows a normal pictures, and uses normal pictures back and forth between p and n pixel by Video Controller.
Then; The present invention provides a kind of liquid crystal indicator that improves film flicker and picture ghost that has again; Comprise that one has the liquid crystal panel of n pixel and the Video Controller of a may command liquid crystal panel displaying contents; Liquid crystal indicator is characterised in that Video Controller is to show normal pictures with one greater than n pixel or less than n pixel or p pixel equaling n pixel, and uses normal pictures back and forth between p and m pixel by Video Controller.
Follow, the present invention provides a kind of the have film flicker that improves liquid crystal indicator and the method for picture ghost more again, and comprising: a liquid crystal panel is provided, and liquid crystal panel has n pixel; And a Video Controller is provided, be to be connected with liquid crystal panel, in order to the control liquid crystal panel with p=n-m, p=n+m, p=n (n>>m) individual pixel shows a normal pictures; Wherein Video Controller is to show normal pictures with p pixel, and uses normal pictures back and forth between p and n pixel by Video Controller.
The present invention provides a kind of the have film flicker that improves liquid crystal indicator and the method for picture ghost again, and comprising: a liquid crystal panel is provided, and liquid crystal panel has n pixel; And a Video Controller is provided, and be to be connected with liquid crystal panel, show normal pictures with one greater than n pixel or less than n pixel or p pixel equaling n pixel in order to the control liquid crystal panel; Wherein Video Controller is used normal pictures back and forth between m pixel.
The present invention provides a kind of liquid crystal indicator that improves film flicker and picture ghost that has again; Comprise one have the MVA structure liquid crystal panel, a backlight module of liquid crystal panel and the Video Controller of a may command liquid crystal panel displaying contents are provided; Liquid crystal indicator is characterised in that when the backlight module of the liquid crystal panel that the MVA structure is provided is closed, and promptly sees the black picture promptly established off to liquid crystal panel by Video Controller.
The present invention provides a kind of liquid crystal indicator that improves film flicker and picture ghost that has again; Comprise one have the TN type liquid crystal panel, a backlight module of liquid crystal panel and the Video Controller of a may command liquid crystal panel displaying contents are provided; Liquid crystal indicator is characterised in that when the backlight module of the liquid crystal panel that the TN type is provided is closed, and promptly seen off the liquid crystal panel of white picture to the TN type promptly established by Video Controller.
The present invention provides a kind of the have film flicker that improves the advertisement cabinet system and the method for picture ghost; Wherein this advertisement cabinet system comprises a Video Controller, a display panel, a backlight and a display panel voltage source; The method comprises: carry out the boot program of advertisement cabinet system, to accomplish start; Video Controller is given this liquid crystal panel with want advertisement playing delivery of content then, with the display ads picture; Then carry out a dormancy program, close backlight by Video Controller; Stop the signal of advertisement picture by Video Controller; A predetermined picture signal then is provided, and is to be shown in liquid crystal panel by Video Controller with a predetermined picture; Close the liquid crystal panel power supply at last, to accomplish the dormancy program of advertisement cabinet system.
A kind of have a liquid crystal indicator that improves film flicker and picture ghost; Comprise that one has the liquid crystal panel of n pixel; Wherein each pixel in the liquid crystal panel is to be formed by a TFT device and liquid crystal capacitance at least, and wherein liquid crystal indicator is characterised in that: control the bias voltage that imposes on the liquid crystal two ends by TFT, reach the effect of demonstration; And therefore the generation of the ghost result of electric charge accumulation just reduces the stool and urine of electric charge and can improve ghost phenomena.So the design makes common voltage (Vcom) into the change form, reduce the two ends bias voltage of liquid crystal.
Embodiment
At first; Please refer to Fig. 2; It is the liquid crystal panel synoptic diagram that improves film flicker and picture ghost that has of the present invention; Wherein in the present embodiment liquid crystal indicator 1 comprises that one has the liquid crystal panel 2 of n pixel and the Video Controller (not being shown among the figure) of a may command liquid crystal panel 2 displaying contents.The Video Controller of liquid crystal indicator 1 be with p=n-m, p=n+m, p=n (wherein n>>m) individual pixel shows a normal pictures.Simultaneously, utilize Video Controller to use normal pictures back and forth between p and n pixel, for example: to make human eye not go out change with 5 minutes mobile 1pixel.
Explain with an embodiment; Liquid crystal panel 2 in a liquid crystal indicator 1 has 3,000,000 (n) pixel (pixels), and Video Controller of the present invention is usually to show normal pictures with p pixel (being p=n-m) 290 everythings less than n pixel, and wherein untapped 100,000 (m) pixel is the outer peripheral areas that is distributed in liquid crystal panel 2; For example: at the place, the upper right corner of liquid crystal panel 2; Therefore, showing when liquid crystal indicator 1 of the present invention in the process of a picture, all be to show a normal picture with 2,900,000 pixels at every turn; And can use picture to display back and forth between p (2,900,000) and the individual pixel of n (3,000,000) by Video Controller; That is to say that picture displayed back and forth shows along the direction in the upper right corner, direction shown in the arrow of Fig. 2.In addition, do not go out the reciprocating action of display frame, so its reciprocal frequency can select greater than 30HZ or the mode of selecting to move 1pixel with every X minute (X>2) makes human eye not go out change in order to make beholder's identification.
The displacement that back and forth produces picture of specific direction thus can make ghost crested on the fixed position, to solve the problem of liquid crystal indicator film flicker and picture ghost.Be stressed that in addition; It is the outer peripheral areas that is distributed in liquid crystal panel 2 upper right corner that untapped pixel m does not limit; It can be other outer peripheral areas, zone on the lower left corner, the lower right corner, centre, liquid crystal panel 2 the right or the left side etc. for example, and the present invention does not limit.
In the foregoing description, liquid crystal indicator 1 further comprises the power supply unit 4 of a liquid crystal panel 2, so that the power supply requirement of liquid crystal panel to be provided.
Please again with reference to figure 3, be that the present invention has the film flicker that improves liquid crystal indicator and another preferred embodiment of picture ghost.Liquid crystal indicator 1 comprises that one has the liquid crystal panel 2 of n pixel and the Video Controller of may command liquid crystal panel 2 displaying contents; Wherein, Liquid crystal panel 2 is identical with first embodiment; But Video Controller is to show normal pictures with p the pixel (being p=n+m) greater than n pixel, and uses normal pictures back and forth between p and n pixel by Video Controller, and wherein reciprocating frequence is greater than the time-out vision of human eyes.For example, reciprocating frequence can be selected greater than 30HZ, can make the people can experience continuous display frame, and not produce the visual phenomenon of flicker, or the mode of selecting to move 1pixel with every X minute (X>2) makes human eye not go out change.Therefore; Showing when liquid crystal indicator 1 of the present invention in the process of a picture; All be to show a normal picture at every turn, and can use picture to display by Video Controller and back and forth be shown on the liquid crystal panel 2 to 3,100,000 each pixel with 3,000,000 (n) with 3,100,000 pixels with 310 (p), ten thousand pixels.In a preferred embodiment, picture displayed back and forth shows along the direction in the upper right corner, direction shown in the arrow of Fig. 3.The displacement that back and forth produces picture of specific direction thus can be eliminated the ghost on the fixed position equally effectively, to solve the problem of liquid crystal indicator film flicker and picture ghost.Be stressed that in addition, reciprocating direction in the present embodiment, the present invention does not limit, and it can be the for example past lower left corner, the lower right corner, centre or the zone on liquid crystal panel 2 the right or the left side etc.
Then, please refer to Fig. 4, is a kind of mode process flow diagram that improves LCD picture flicker and picture ghost of the present invention.As shown in Figure 4, the method for improving the film flicker and the picture ghost of liquid crystal indicator 1 of the present invention may further comprise the steps:
(1) liquid crystal panel is provided, liquid crystal panel 2 has n pixel, shown in step 10;
(2) Video Controller being provided, is to be connected with liquid crystal panel 2, in order to control liquid crystal panel 2 with n-m (n>>m) individual pixel shows a normal pictures, wherein the pixel that do not use of m is the outer peripheral areas that is distributed in liquid crystal panel 2, shown in step 20;
(3) use normal pictures back and forth between n-m pixel and n pixel by Video Controller; The displacement that back and forth produces picture of specific direction thus; Can cover the ghost on the fixed position effectively; Wherein reciprocating frequence can be selected to be greater than 30HZ second or select to make human eye not go out change with the mode of every X minute (X>2) mobile 1pixel, shown in step 30.
Please continue with reference to figure 4, the present invention discloses the mode that another kind improves LCD start-up picture next time flicker and picture ghost, may further comprise the steps:
(1) liquid crystal panel is provided, liquid crystal panel has n pixel, shown in step 10;
(2) Video Controller being provided, is to be connected with liquid crystal panel 2, shows normal pictures in order to control liquid crystal panel 2 with a p pixel greater than n pixel, shown in step 20;
(3) use normal pictures back and forth between p pixel by Video Controller; The displacement that back and forth produces picture of specific direction thus; To cover the ghost on the fixed position, wherein reciprocating frequence can be selected to be greater than 30HZ second or select to make human eye not go out change with the mode of every X minute (X>2) mobile 1pixel., and do not produce the visual phenomenon of flicker, shown in step 30.
Then please refer to Fig. 5; Be that another kind of the present invention has the step of improving film flicker and picture ghost, wherein liquid crystal indicator 1 comprises that a liquid crystal panel 2, one provide the backlight module 5 of liquid crystal panel 2 and the individual Video Controller of may command liquid crystal panel 2 displaying contents.After liquid crystal indicator 1 is accomplished boot program, shown in step 210; And after normal pictures shows a period of time, shown in step 220; Then, when liquid crystal indicator 1 desire gets into dormant state, promptly only close liquid crystal panel 2 and do not shut down; Video Controller in the liquid crystal indicator 1 can be closed the backlight module in the liquid crystal panel 25 earlier, shown in step 230; Video Controller can stop the demonstration of normal pictures then, shown in step 240; See black picture a to liquid crystal panel 2 off by Video Controller more immediately, shown in step 250, close the program of the power supply of liquid crystal panel 2 by Video Controller more at last, like step 260 with the completion dormancy.So in the present embodiment; Produce outside the phenomenon of film flicker and picture ghost in the time of not only can avoiding closing liquid crystal panel 2; After dormancy a period of time, in the time need restarting liquid crystal panel 2 screens next time, can open (because not needing to activate again liquid crystal indicator 1) fast.
As stated, when the liquid crystal panel 2 of liquid crystal indicator 1 of the present invention was the liquid crystal panel of a TN type, its dormancy program was identical, just was white at the predetermined picture that step 250 provided.
Embodiment with an advertisement cabinet explains, please continue with reference to step shown in Figure 5:
(1) at first, accomplish the program of system boot, shown in step 210.
(2) then, give liquid crystal panel by Video Controller with want advertisement playing delivery of content, with the display ads picture, shown in step 220;
(3) when carrying out the ad content replacing or suspending ad playing, promptly close the power supply of backlight earlier, shown in step 230 by Video Controller;
(4) then, stop the signal of advertisement picture by Video Controller, shown in step 240;
(5) by Video Controller a predetermined picture signal is provided again, covers the picture of film flicker or picture ghost with this predetermined picture, with this problem of releiving.Be stressed that especially, when the liquid crystal panel in the advertisement plate is a kind of MVA structure, a predetermined black picture be provided; When the liquid crystal panel in the advertisement plate is a kind of liquid crystal panel of TN type, a predetermined white picture is provided.
(6) last, close the panel power supply by Video Controller again, with the program of accomplishing dormancy shown in step 260.
At last; The present invention further discloses a kind of liquid crystal indicator that improves film flicker and picture ghost that has; And liquid crystal indicator comprises that one has the liquid crystal panel of n pixel, and wherein each pixel in the liquid crystal panel is to be formed by a TFT device and liquid crystal capacitance at least.Please with reference to Fig. 6 a and Fig. 6 b; In the present embodiment, be with the common voltage (Vcom) of the liquid crystal capacitance that forms pixel in the liquid crystal panel type of drive, shown in Fig. 6 a (a kind of prior art) by Dc bias (DC bias); Change over AC bias (AC bias) and drive, shown in Fig. 6 b.Therefore, can be accurate by the position of adjustment AC bias, for example V-com voltage is changed over one and have specific voltage position standard, in the time of for example positive and negative 2 volts, then this moment, the voltage that drives liquid crystal capacitance can be reduced to positive and negative 8 volts and just can drive.Therefore; Can the common voltage that need could be driven by the DC voltage of 10V originally be reduced to 8V just can drive; Reduce driving voltage thus and reach of the influence of reduction electric field liquid crystal molecule, thus the picture ghost phenomena can be lowered, and do not influence the demonstration performance of liquid crystal indicator 1 originally.Clearly, impose on the bias voltage at liquid crystal two ends, reach the effect of demonstration, and therefore the generation of the ghost result of electric charge accumulation just reduces the size of electric charge and can improve ghost phenomena by TFT control.So the design makes common voltage (Vcom) into the change form, reduce the two ends bias voltage of liquid crystal.
The above is merely preferred embodiment of the present invention, is not in order to limit the right of applying for a patent of the present invention; Above simultaneously description should be understood and implemented for the special personage who knows the present technique field.Therefore other does not break away from equivalence change or modification that technological means of the present invention is accomplished, all should be included in the claim scope of the present invention.