CN101276533B - Hold type image display system - Google Patents
Hold type image display system Download PDFInfo
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- CN101276533B CN101276533B CN2008100907259A CN200810090725A CN101276533B CN 101276533 B CN101276533 B CN 101276533B CN 2008100907259 A CN2008100907259 A CN 2008100907259A CN 200810090725 A CN200810090725 A CN 200810090725A CN 101276533 B CN101276533 B CN 101276533B
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Abstract
The present invention aims to insert a black screen in one frame period to alleviate moving image blur due to overlap recognition of a current frame image and an afterimage of the previous frame and improve the image quality of the moving image, and to set a black insertion rate with respect to one frame period to a value suited for each usage state. An enable signal (VOE) to each gate driver is independently controlled, and a start pulse (VSP) input to write a black signal is performed at an arbitrary timing within one frame period with respect to the gate driver to insert a black image within one frame period.
Description
The cross reference of related application
The application based on and require the rights and interests of the right of priority of Japanese patent application No.2007-086190 that submitted on March 29th, 2007 and the Japanese patent application No.2008-039351 that submitted on February 20th, 2008, the full text content of these applications is through with reference to being merged in this paper.
Technical field
The present invention relates to a kind of maintenance image display system.
Background technology
Traditionally, because LCD (LCD) is compared the erection space that CRT (cathode-ray tube (CRT)) display approached and can not take as much, therefore be widely used usually.But for example among the LCD, for example CRT monitor is opposite with the impulse type display device at the maintenance image display device, and image is continuous in the frame period, so live image is easy to thicken.
Under the situation of impulse type display device, in the initial stage of frame image is shown as pulse, and show black display black till next frame, and therefore, regulate after image and take place so that do not discerned by user's eyes.On the other hand, under the situation of maintenance image display device, in the frame period, image is kept as rest image and show; And through coming the show events image for the toggle screen of each frame; Therefore, rest image is seamlessly switched to another frame from a frame, and the user is identified as after image with previous two field picture thus; Feel and wherein move image, and it is fuzzy to identify live image by overlapping dual imaging.For the live image that improves in the maintenance display device blurs, a kind of being used in the pseudo-maintenance display device that drives of impulse type display disclosed in Japanese Laid-open announcement No.9-18814 (patent documentation 1).
But the liquid crystal indicator of patent documentation 1 switched between black black display and video show for per 1/2 frame period of input signal, therefore, was restricted to 1/2 with respect to the black insertion rate of a frame.Therefore; In the device of patent documentation 1; Through considering the balance between the reduction of fuzzy improvement of live image and brightness; Set and the corresponding best black insertion rate of each user mode, the improvement that live image is fuzzy is the advantage that black inserts, and the reduction of brightness is the shortcoming that black inserts.
Have many LCD drive methods according to liquid crystal panel, and if LCD drive method according to every kind of panel of for example TN type, IPS type, VA type and OCB type and difference, also difference of the different and best black insertion rate of response performance then.For the device of patent documentation 1, the black that is suitable for all methods inserts the application that drives and is difficult to.And, in the liquid crystal indicator of patent documentation 1, become essentially because the driving frequency of this device need double and be used for the frame memory of interim store video information, therefore having increased circuit scale has also improved cost.
On the other hand, a kind of device that increases the flexibility ratio of black insertion rate and avoid circuit scale to increase is disclosed in Japanese Laid-open announcement No.2001-166280 (patent documentation 2).Shown in Figure 14 to 16; The liquid crystal indicator of patent documentation 2 has such structure: will begin pulse signal (VSP) and be input to each gate drivers respectively; To launch signal (VOE) or control signal and be input to the half the of a plurality of gate drivers, and polarity will be input to remaining half gate drivers by the signal of launching of phase inverter anti-phase.Respectively from gate line of each half selection of gate drivers; Wherein, Will with launch the signal video signal corresponding and write a pixel on the gate line; And will with polarity by the pixel that the corresponding black signal of signal is write another gate line of launching of anti-phase, thereby can change the black insertion rate of gate drivers section.
But, when commercialization has the product of the resolution that is used for TV, if use the gate drivers that provides on the market; Then in VA (Video Graphics Array), use two gate drivers usually, and in XGA (XGA), use three gate drivers, yet; In the structure of the device of patent documentation 1, gate drivers is limited to even number, therefore when it is applied in the product; The flexibility ratio of the quantity of selection gate drivers is lower; And in some cases, the additional gate driver IC becomes requisite, thereby needs the cost of waste.
In the device of patent documentation 2; A gate drivers is launched the scanning that the beginning video shows; And simultaneously, preassigned another gate drivers is launched the scanning of beginning black display, therefore only black insertion rate can be set in segmentation place of gate drivers; And use fixed black insertion rate to come executable operations with respect to frame, be difficult to set best black insertion rate changeably according to each user mode for this reason.
In addition, in patent documentation 1 in the disclosed device, on a plurality of frames, write under the situation of black image and do not consider the continuous maintenance in the blanking cycle.Therefore; Shown in figure 15; When writing of black signal runs to next frame, produce and black cycle time corresponding interval, therefore produced the difference of the black image retention time between first screen and second screen; And in a screen, demonstrate luminance difference shown in figure 16, and be used as the border from its line that produces the difference of black image retention time.
Summary of the invention
Illustrative purpose of the present invention provide a kind of maintenance image display; It can insert black image in a frame period; The live image that causes with the overlapping identification that reduces owing to the after image of current frame image and previous frame is fuzzy and improve the picture quality of live image, and can set the black insertion rate with respect to a frame period changeably according to each user mode.
In order to realize this illustrative purpose; A kind of maintenance image display system according to illustrative aspects of the present invention; The maintenance image display system that relates to vision signal display video on display panel of the source electrode line that will be input to display panel and gate line through control; This maintenance image display system comprises: source electrode driver is used for vision signal is outputed to source electrode line; Gate drivers is used for sweep signal is outputed to gate line; And controller, thereby be used to receive incoming video signal Controlling Source driver and gate drivers; Its middle controller will wherein insert black or grey level between video line vision signal outputs to source electrode driver; And in a frame period; To be used for beginning pulse signal that one or many writes video line and be used for the beginning pulse signal that one or many writes black or grey level and output to gate drivers, and one image duration the roll display panel screen on the black frequency band.
The control device that relates to a kind of maintenance image display system according to the control device of a kind of maintenance image display system of another illustrative aspects of the present invention; It is used for through the signal of controlling the vision signal of the source electrode line of going to display panel at source electrode driver and the gate line of display panel is gone in control in gate drivers; On display panel, drive display video; This control device comprises: controller is used to receive incoming video signal and Controlling Source driver and gate drivers thus; Wherein, Controller will wherein insert black or grey level between video line vision signal outputs to source electrode driver; And in a frame period, will be used for beginning pulse signal that one or many writes video line and be used for the beginning pulse signal that one or many writes black or grey level and output to gate drivers, and one image duration the roll display panel screen on the black frequency band.
A kind of maintenance method for displaying image according to another illustrative aspects of the present invention relates to a kind of maintenance method for displaying image; It is used for will being imported into the source electrode line of display panel and vision signal display video on display panel of gate line through control; This maintenance method for displaying image may further comprise the steps: through receiving the source electrode driver and the gate drivers that is used for sweep signal is outputed to gate line that incoming video signal and control are used for vision signal is outputed to source electrode line, come display video signal; Vision signal through will wherein between video line, inserting black or grey level outputs to source electrode driver; In a frame period, will be used for the beginning pulse signal that one or many writes video line and output to gate drivers; In a frame period, will be used for the beginning pulse signal output gate drivers that one or many writes black or grey level; And one image duration the roll display panel screen on the black frequency band, thereby between the video of display panel shows, carry out black and gray scale demonstration.
The control program that relates to a kind of maintenance image display system according to the control program of a kind of maintenance image display system of another illustrative aspects of the present invention; Be used on display panel, driving display video through the signal of controlling the vision signal of the source electrode line of going to display panel at source electrode driver and the gate line of display panel is gone in control in gate drivers; The vision signal that this program makes computing machine will be wherein between video line, insert black or grey level outputs to source electrode driver, and in a frame period, will be used for beginning pulse signal that one or many writes video line and be used for the beginning pulse signal that one or many writes black or grey level and output to gate drivers.
As exemplary advantage according to the present invention; The present invention can regulate the black insertion rate with respect to a frame period subtly; Consider the balance between the shortcoming of the brightness that improves fuzzy advantage of live image and reduction maintenance display device simultaneously, thereby improve the picture quality of live image.
Description of drawings
Figure 1A shows the view according to the structure of the image display device of first exemplary embodiment of the present invention, and Figure 1B shows the sectional view of the structure of pixel, and Fig. 1 C shows the view of another structure example of controller;
Fig. 2 shows and in the exemplary embodiment shown in Figure 1A-1C, produces the key drawing that black inserts the step of vision signal;
Fig. 3 shows the sequential chart of the signal of propagating the image display device that passes through the exemplary embodiment shown in Figure 1A-1C;
Fig. 4 shows the key drawing of operation of the image display device of the exemplary embodiment shown in Figure 1A-1C;
Fig. 5 shows the key drawing that the live image in the image display device of the exemplary embodiment shown in Figure 1A-1C shows;
Fig. 6 shows the key drawing of operation of the image display device of the exemplary embodiment shown in Figure 1A-1C;
Fig. 7 shows the key drawing of another instance of the step that in the exemplary embodiment shown in Figure 1A-1C, generates black insertion vision signal;
Fig. 8 shows the view of the structure of the image display device of second exemplary embodiment according to the present invention;
Fig. 9 shows the process flow diagram according to the operation of the black insertion rate setup unit of exemplary embodiment shown in Figure 8;
Figure 10 shows black image input rate in display panel of the present invention, live image is fuzzy and the view of the relation property of efficiency of transmission;
Figure 11 shows the view of the operation of the black insertion rate setup unit in exemplary embodiment shown in Figure 8;
Figure 12 shows the view of the operation of the black insertion rate setup unit in exemplary embodiment shown in Figure 8;
Figure 13 shows the view of relation property of maximal value, black insertion rate and the photocontrol brightness backlight of the displacement of each piece that in exemplary embodiment shown in Figure 8, is calculated by black insertion rate setup unit;
Figure 14 shows the view of the structure of traditional images display device;
Figure 15 shows the key drawing of the operation of traditional images display device; And
Figure 16 is the key drawing of the display screen in the traditional images display device.
Embodiment
Followingly describe exemplary embodiment of the present invention in detail according to accompanying drawing.
Like Figure 1A-1C and shown in Figure 8; Maintenance image display system according to an illustrative embodiment of the invention be devoted to a kind of be used for through control to be imported into display panel source electrode line H1, H2 ... .., Hn and gate line V1, V2 ..., the signal of Vn is with the maintenance image display system of display video on display panel; Comprise as basic structure: be used for vision signal output to source electrode line H1, H2 ... the source electrode driver 4 of .., Hn; Be used for sweep signal output to gate line V1, V2 ..., the gate drivers 5A of Vn, 5B ... .., 5N, and controller 7.Controller 7 will wherein insert black line or grey level (the hereinafter unification is called " black ") between video line vision signal (vision signal of black insertion hereinafter referred to as) outputs to source electrode driver 4 (Fig. 2 and 7), and in a frame period, will be used for beginning pulse signal that one or many writes video line be used for beginning pulse signal that one or many writes black line output to gate drivers 5A, 5B ..., 5N (Fig. 3).
In exemplary embodiment of the present invention; The source electrode driver that is used for through control vision signal is outputed to source electrode line comes display video signal with the gate drivers that is used for sweep signal is outputed to gate line; And the black video signal through will wherein between video line, inserting the black line gray scale outputs to source electrode driver; With in a frame period, will be used for beginning pulse signal that one or many writes video line and be used for the beginning pulse signal that one or many writes black line and output to gate drivers, come between the video of display panel shows, to carry out black display.
Describe especially; Shown in Fig. 5 A; Frame begin to locate to import the beginning pulse signal that is used to write video line, the TFT of sequential turn-on liquid crystal panel changes the line (video line) of screen simultaneously and changes the line of the TFT screen of (scanning) display panel (liquid crystal panel) simultaneously.The signal (VOE_i) of launching that is used to write video line is imported into gate drivers during the cycle of transition video line.Controller 7 is input to gate drivers 5 according to the black insertion rate of confirming will be used to write black line in the optional position in a frame period beginning pulse (VSP_b), and the TFT of sequential turn-on display panel (liquid crystal panel) transition video line simultaneously.
In the foregoing description, exemplary embodiment of the present invention is constructed to a kind of maintenance image display system as hardware, but can be constructed to a kind of program of in personal computer, carrying out through controller 7 performed functions.In this case; Be configured to according to the control program of the maintenance image display system of exemplary embodiment of the present invention and have a kind of structure; This structure is used to make computing machine carry out following function: the black video signal that will be wherein between video line, inserts black line outputs to source electrode driver, and in a frame period, will be used for beginning pulse signal that one or many writes video line and be used for the beginning pulse signal that one or many writes black line and output to gate drivers.
Shown in Fig. 5 B; According to exemplary embodiment of the present invention; In a frame period in screen rolling black frequency band; The retention time of vision signal and the retention time of black signal all keep constant in all video lines of screen, and have eliminated luminance difference in the face that the difference owing to the retention time causes.
Use is applied to liquid crystal panel is used for the particular instance of the maintenance image display system of display panel, further describes the maintenance image display system according to exemplary embodiment of the present invention.
(first exemplary embodiment)
Figure 1A shows the view according to the structure of the image display device of first exemplary embodiment of the present invention.Shown in Figure 1A; The image display device of first exemplary embodiment comprises: display panel 1; Wherein m (m is a natural number) bar gate line V1 is configured to cross one another to Vm and n (n is a natural number) bar source electrode line H1 to Hn and is grid to each point of crossing of Hn, to form pixel 6 to Vm and source electrode line H1 at gate line V1; Source electrode driver 4 is connected to every source electrode line H1 to Hn, is used to provide vision signal; And a plurality of gate drivers 5A are to 5n, and with respect to each grid line groups configuration, wherein, many gate line V1 are divided into a plurality of groups to Vm, are used for gate turn-on signal (Vg) is offered corresponding gate line V1 to Vm in proper order.
Shown in Figure 1A; I gate line V1 from the top is connected to gate drivers 5A to Vi; The i+1 bar is connected to gate drivers 5B to j bar gate line V (i+1) to Vj, and last 1+1 bar is connected to gate drivers 5N (do not illustrate and be used for the j+1 bar to j bar gate line) to m bar gate line V (1+1) to Vm.
Figure 1B is the view that shows the circuit of a pixel 6 shown in Figure 1A with the expansion mode.The circuit of the pixel 6 of the formation display panel 1 in first exemplary embodiment has a kind of structure; Wherein, The source electrode of thin film transistor (TFT) (TFT) 12 is connected to source electrode line H1 to Hn; The gate electrode of TFT 12 is connected to gate line V1 to Vm, and the drain electrode of TFT 12 is connected to the pixel electrode 13 that on a glass substrate, forms, and liquid crystal layer 14 is clamped between pixel electrode 13 that in a glass substrate, forms and the common electrode 15 that in another glass substrate, forms.
Use is recently carried out the video demonstration by the optical transmission of the liquid crystal layer 14 that the potential difference (PD) between pixel electrode 13 and the common electrode 15 is controlled; But when vision signal is written to pixel 6; Via gate turn-on signal (Vg1 to Vgm) the conducting TFT 12 of gate line V1 to the Vm transmission; Tone voltage (tone voltage) that thus will be corresponding with vision signal is applied to pixel electrode 13 from source electrode line H1 to Hn; And realize showing, simultaneously through at the common electrode that is made as constant voltage 15 and apply the optical transmittance of controlling liquid crystal layer 14 with the potential difference (PD) between the pixel electrode 13 of tone voltage according to the video of vision signal.
The image display device of first exemplary embodiment comprises: controller 7; Be used for Controlling Source driver 4 and the operation of gate drivers 5A to 5N; This controller 7 comprises that black inserts signal conversion unit 8; Be used for black signal is inserted into incoming video signal, in horizontal scanning period, produce the black that comprises video signal portions and black signal part and insert vision signal, and with its output; And driving control unit 9, be used for that black is inserted vision signal and output to source electrode driver 4 from black insertion signal conversion unit 8.
As shown in Figure 2; A frame period is divided into the write cycle time (horizontal scanning period) to the identical quantity of the quantity (m) of Vm with gate line V1; And when will the part corresponding with the write cycle time of incoming video signal being assumed to be line image section (horizontal scanning period part), black inserts signal conversion unit 8 to have black signal is inserted into the function that between the line image section in the incoming video signal and similarly black signal is inserted into the blanking cycle in the incoming video signal.In Fig. 2; Show black signal is inserted into the situation in the incoming video signal that in blanking cycle, has glitch output; But the invention is not restricted to this, and black inserts under signal conversion unit 8 do not have glitch output similarly in blanking cycle the situation of incoming video signal and inserts black signal.Usually, vision signal adopts different forms, for example, in blanking cycle, has glitch output or does not have output.
In first exemplary embodiment; A kind of structure has been described; That is, will insert that black that signal conversion unit 8 produces inserts that vision signal is input to source electrode driver 4 and drive by black it will be outputed to source electrode line H1 to Hn, still be not limited thereto with double-speed; Source electrode driver 4 can have a kind of function; Be about to output to source electrode line H1 to the electric charge conduct of the Hn tone electric charge corresponding, with constant interval output charge switched to the tone electric charge corresponding with black display simultaneously to Hn thereby incoming video signal is outputed to source electrode line H1 with black display, as shown in Figure 7.Then, need not dispose black and insert signal conversion unit 8, promptly yet, can reduce for black image and insert necessary line memory, and need the driving frequency that black image inserts related source electrode driver 4 not doubled yet.
Therefore; Each gate drivers 5A has a kind of function to 5N; Promptly jointly the gate line V1 of control linkage to Vi, V (i+1) to Vj ..., the output of V (l+1) to the Vm, particularly, have: a kind of function of serving as the videoscanning device; Be used for having the video demonstration gate turn-on signal of gate turn-on signal as certain pulse width in response to VOE_i from driving control unit 9; Line image section only black is inserted vision signal is write in the pixel 6, sequentially with its be provided to gate line V1 to Vi, V (i+1) to Vj ..., V (l+1) is to Vm, and order is carried out the video reading scan; And a kind of function of serving as the black scanister; Black is used for having the black display gate turn-on signal of gate turn-on signal as certain pulse width in response to VOE_b; Black image only black is inserted vision signal is partly write pixel 6; Order with its be provided to gate line V1 to Vi, V (i+1) to Vj ..., V (l+1) arrives Vm, and sequentially carries out the black image reading scan.
And controller 7 comprises black insertion rate setup unit 10, is used for setting the sequential that is begun pulse (VSP_b) by the black display of driving control unit 9 outputs arbitrarily according to operating environment.Controller 7 comprises black insertion rate setup unit 10, but is not limited thereto.Shown in Fig. 1 C, can dispose black insertion rate setup unit 10a and replace black insertion rate setup unit 10.No matter what input signal is, by the user data that black inserts rate is input to black insertion rate setup unit 10a, and black insertion rate setup unit 10a outputs to driving control unit 9 with black insertion rate.When using black insertion rate setup unit 10a, the data of the black insertion rate that the user will be corresponding with luminance difference in the face are input to black insertion rate setup unit 10a, check screen simultaneously.Therefore, can abide by the user and set black insertion rate.
Black insertion rate setup unit 10 has a kind of function of in reference to incoming video signal, confirming to be used for the black image insertion rate in each frame period, and has and a kind ofly will set the function by the sequential of the VSP_b of driving control unit 9 outputs accordingly with the black image insertion rate of confirming.Particularly, black insertion rate setup unit 10 comprises: the frame memory (not shown) is used for the information of interim storage order ground for a frame of the incoming video signal of every frame input; And the unit (not shown), be used for the vision signal of a frame of incoming video signal is compared with the vision signal that is stored in the previous frame of elder generation of frame memory, and confirm best black image insertion rate according to the data that change.
Thus, confirm to be suitable for the black image insertion rate that is used for each frame period of the driving method, user mode etc. of display panel 1, and set the sequential of the VSP_b output that is used to realize the black image insertion rate confirmed.Here the sequential of setting is such sequential, utilizes this sequential, uses a gate drivers side by side not select to be used to write video line and the pixel line that is used to write the black image line.
Thereby; Time place being set by black insertion rate setup unit 10 will be input to gate drivers 5A from the VSP_b that drives control module 9; Gate drivers 5A based on the VOE_b that provides in advance sequentially with VSP_b offer gate line V1 to Vi as black display gate turn-on signal, and when stopping scanning, the VSP_b displacement is outputed to gate drivers 5B.When gate drivers 5A when 5N sequentially carries out this scanning, be implemented in the black image insertion rate of confirming in the black insertion rate setup unit 10 that is used for each frame.
Polarity anti-phase control signal (POL) is to be used to change from source electrode driver 4 output to the control signal of source electrode line H1 to the polarity of voltage of the tone voltage of Hn.POL avoids DC voltage to be applied on the liquid crystal through control.
Black in controller 7 inserts signal conversion unit 8, driving control unit 9 and black insertion rate setup unit 10 can have its functional content, and it is programmed to be carried out by computing machine.
Fig. 3 is a sequential chart of propagating the signal of the image display device that passes first exemplary embodiment.
Fig. 3 A be used for wherein with the line picture signal offer be positioned at the gate line V1 corresponding with gate drivers 5A to the Vi pixel 6 and black signal offered the sequential chart that is positioned at the situation of the pixel 6 of the corresponding gate line V (i+1) of gate drivers 5B to the Vj; Fig. 3 B be used for wherein with black signal offer be positioned at the gate line V1 corresponding with gate drivers 5A to the Vi pixel 6 and the line picture signal offered the sequential chart that is positioned at the situation of the pixel 6 of the corresponding gate line V (i+1) of gate drivers 5B to the Vj.
Shown in Fig. 3 A; When the line picture signal being offered when being positioned at the pixel 6 of corresponding gate line V1 to Vi; VOE_i is input to gate drivers 5A; Thereby the gate turn-on signal is converted into the video with pulsewidth identical with the line picture signal output cycle of source electrode driver 4 shows the gate turn-on signal, and sequentially is provided to gate line V1 to Vi from gate drivers 5A.
When black signal being offered when being positioned at the pixel 6 of gate line V (i+1) to Vj; VOE_b is input to gate drivers 5B; Thereby the gate turn-on signal is converted into the black display gate turn-on signal with pulsewidth identical with the black signal output cycle of source electrode driver 4, and sequentially is provided to gate line V (i+1) to Vj from gate drivers 5B.
Therefore, in first embodiment, can in the 1H cycle (horizontal scanning period), vision signal or black signal be written to the pixels with different line.
The operation of the image display device of first exemplary embodiment will be described now.Fig. 4 is the view of operation of describing the image display device of this exemplary embodiment.Also will be illustrated in each step in the method that drives image display device of the present invention so that describe simultaneously.
According to the vision signal by 10 inputs of black insertion rate setup unit, definite and setting is used for the black image insertion rate (black insertion rate is set step) in each frame period.On the other hand, insert in the signal conversion unit 8, between the line image section of incoming video signal, insert black signal, and it is outputed to driving control unit 9 as black insertion vision signal (black inserts the conversion of signals step) at black.
When black being inserted vision signal when driving control unit 9 outputs to each source electrode driver 4, synchronously different drive control signal is outputed to gate drivers 5A to 5N and each source electrode driver 4 with it.
In first exemplary embodiment, use a plurality of gate drivers that can jointly launch grid output, and come control gate driver 5A to 5N by launching signal (VOE_i or VOE_b) from the independently output that drives control module 9.
As shown in Figure 2, black inserts vision signal and is input to source electrode driver 4 from driving control unit 9.Source electrode driver 4 alternately outputs to source electrode line H1 to Hn (black inserts vision signal step is provided) with vision signal and black signal according to the black insertion vision signal of input.
As shown in Figure 4; The VSP_i and the VOE_i of the beginning of expression frame together are input to gate drivers 5A (video begins the pulse input step) from drive controlling 9; And the synchronous gate turn-on signal transition gate line V1 of VSP_i conduct and the clock signal (VCK) of similar input is to Vi, and conducting is positioned at the TFT 12 of the pixel 6 of every gate line V1 to the Vi.Simultaneously, VOE_i is input to gate drivers 5A.
During scanning in terminating in gate drivers 5A, the VSP_i displacement is input to gate drivers 5B, and simultaneously, VOE_i is input to gate drivers 5B from driving control unit 9.In gate drivers 5B, VSP_i to Vj, wherein is input to gate drivers 5B with VOE_i as gate turn-on signal transition gate line V (i+1) during the transformation cycle.Then, similarly the VSP_i displacement is input to gate drivers 5N, and simultaneously VOE_i is imported from driving control unit 9.And in gate drivers 5N, VSP_i arrives Vm as the corresponding gate line V of gate turn-on signal transition (l+1), and during the transformation cycle, imports VOE_i (videoscanning step).In the cycle except the above-mentioned cycle VOE_b is input to gate drivers 5A to 5N.
According to the sequential of confirming by black insertion rate setup unit 10; In the frame period, will be input to gate drivers 5A once (black display begins the pulse input step) from the VSP_b that drives control module 9; And similarly; Utilize the clock signal (VCK) of gate drivers 5A, VSP_b as the corresponding gate line V1 of gate turn-on signal transition to Vi and turn on the TFT of the pixel 6 of each gate line V1 to the Vi.During this black image reading scan, VOE_b is input to gate drivers 5A.
During black image reading scan in terminating in gate drivers 5A, the VSP_b displacement is input to gate drivers 5B, and VSP_b as the corresponding gate line V of gate turn-on signal transition (i+1) to Vj.But also during the transformation cycle, VOE_b is input to gate drivers 5B.Afterwards, the VSP_b displacement is input to gate drivers 5N, and the black image reading scan (black scanning step) of beginning in gate drivers 5N.
Therefore; In first exemplary embodiment, the black display scanning beginning pulse (VSP_b) that the video reading scan that will be used in a frame period, writing a video line begins pulse (VSP_i) and is used in a frame period, writing a black image line is input to gate drivers 5A.
According to this structure, in screen display, can be implemented in a black image insertion driving that the black frequency band rolled and passed through screen image duration, shown in Fig. 5 B.The width of black frequency band is confirmed with respect to the time (timing) that the video reading scan begins pulse (VSP_i) input by black display scanning beginning pulse (VSP_B) input.In addition; According to first exemplary embodiment; Through continuing writing of black signal in the blanking cycle between frame; All pixel 6 places that the retention time of vision signal and the retention time of black signal become in screen are constant, as shown in Figure 4, and can eliminate luminance difference in the face that the difference owing to the retention time causes.
VSP_b can import at any time; But as long as this time as such in black VSP setting range shown in Figure 6; The pixel line of vision signal and the pixel line of black signal can not selected by a gate drivers simultaneously, and do not apply the restriction of the time of identical with the conventional display device cutting to gate drivers.Thus, can regulate black insertion rate subtly, and can consider and improve the fuzzy effect of live image; Its advantage and brightness that is black image inserts reduces, and it is the shortcoming that black image inserts; Between balance, set the best black insertion rate corresponding with environment for use.
In first exemplary embodiment, can best black be inserted the LCD drive method of driven application to any kind that is adopted by display panel 1, this display panel 1 can be TN template, IPS template, VA template, OCB template or the like.
In first exemplary embodiment, in image display device, show that through between the display frame image, inserting black image it is fuzzy to have alleviated live image, but is not limited to black display, and the gray scale that can insert such as gray scale shows.Gray scale in this case, except alleviated live image fuzzy, can also suppress the reduction of brightness, but reduce the contrast with colored region, therefore, adopt through considering that this problem sets the structure of optimum gradation insertion rate.
In first exemplary embodiment; Black insertion rate setup unit 10 confirms to be used for the black image insertion rate in each frame period with reference to incoming video signal; And according to the black image insertion rate of confirming; Being set in gate drivers 5A begins to provide black video to show the time of gate turn-on signal in 5N; But be not limited thereto, and black insertion rate setup unit 10 can be according to operation through the user or the like and from the time data of outside input, be set in the time that gate drivers 5A beginning output black in the 5N shows the gate turn-on signal.
The first above-mentioned exemplary embodiment can change black image insertion rate through changing the time that VSP_b is input to gate drivers 5A; And; It also can be carried out and wherein not carry out the driven that black image inserts through not importing VSP_b, and is easy to switch black image insertion rate.Therefore; A kind of bright screen with a small amount of flicker that black inserts that need not to carry out when in monitor, using can be provided; And for the live image demonstration of for example TV provides a kind of screen; It is carried out, and black inserts and to have a live image of minimizing fuzzy, and the demonstration corresponding with user's user mode can be provided thus.
Such as the application of switching black image insertion rate continuously according to the scene of video, from such as the still image of landscape to live image such as motion, also be fine.
(second exemplary embodiment)
Second exemplary embodiment of the present invention will be described now.
Fig. 8 shows the view of the structure of the image display device of second exemplary embodiment according to the present invention.Identical Reference numeral is represented and the identical parts of first exemplary embodiment shown in Figure 1A.As shown in Figure 8, except the structure similar with first exemplary embodiment, it is backlight 21 that second exemplary embodiment has, and look from the user is arranged on the back side of display panel 1 over there.Black insertion rate setup unit 20 has a kind of function; That is: be stored as the information of a frame of the incoming video signal of each frame sequential input temporarily; The vision signal of a frame of the incoming video signal vision signal with the previous frame of interim storage is compared; And confirm black image insertion rate and photocontrol brightness backlight according to the data bulk that changes, and driving control unit 29 has the function of confirming to regulate backlight 21 photocontrol brightness according to black insertion rate setup unit 20.
Fig. 9 shows the process flow diagram of the operation of the black insertion rate setup unit 20 in the image display device of second exemplary embodiment.
Black insertion rate setup unit 20 is current frame data " data (n) " and frame data " data (n-1) " relatively, and is that a frame calculates the data (Fig. 9: step S91 is to S93) that change.Step S96), and by threshold determination (Fig. 9: be still image or dynamic image so that judge this image step S96) information that calculates is moved on average to several frames and by level and smooth (Fig. 9:.
If the result who judges shows it is still image; Do not carry out then that black inserts and backlight 21 photocontrol brightness is made as 50% (Fig. 9: step S98); Otherwise; If the result who judges shows it is dynamic image, then black insertion rate is switched to 50% fuzzyly to improve live image, and backlight 21 photocontrol brightness switched to 100% (Fig. 9: step S97).
According to this structure, can switch black insertion rate according to the scene of video, and it is fuzzy to improve live image as required.Inserting the reason of regulating backlight 21 light according to black image is, the fuzzy improvement of exchange live image, and the efficiency of transmission of this panel is because the black image insertion becomes lower, and is shown in figure 10.Then, can prevent to change, and insert under the situation of non-essential still image, can reduce power consumption through carrying out backlight 21 photocontrol at black image owing to the brightness that switching that black inserts causes.
Figure 11 to 13 shows another instance of the operation of the black insertion rate setup unit 20 in second exemplary embodiment.
Confirm by black insertion rate setup unit 20 that the another kind of method of black image insertion rates and photocontrol brightness backlight comprises a frame is divided into a plurality of predefined, shown in figure 11.Then, the image that calculates any piece moves to the distance of present frame from previous frame, and is shown in figure 12.
As the method for computed range, this method can be through using tree search method etc. to detect the position and the minimum piece of average absolute value error wherein of the piece of previous frame from present frame, and obtains the mobile distance of relevant block.
The maximal value of displacement of the calculating of each piece has been shown in Figure 13, and in the black insertion rate at respective point place and backlight 21 photocontrol brightness.According to this structure, through switching black insertion rate continuously, and insert according to the black image that the degree that moves is carried out required minimum according to moving of the scene of video, reduce power consumption backlight.
Another exemplary embodiment of the present invention is described now.The 3rd exemplary embodiment of the present invention relates to a kind of image display device that is equipped with display panel; In this display panel; Many gate lines and many source electrode lines are arranged to grid and intersect each other respectively; On each point of crossing of gate line and source electrode line, form pixel, image display device comprises: the source electrode line drive unit is used for that the black that comprises line image section and black image part is inserted vision signal and alternately offers every source electrode line; The videoscanning device, the video that only is used for sequentially will being used for the line image section that black inserts vision signal is written to pixel shows that the gate turn-on signal offers every gate line and carries out the video reading scan; And the black scanister, the black display gate turn-on signal that only is used for sequentially will being used for the black image that black inserts vision signal partly is written to pixel offers every gate line and carries out the black image reading scan; Wherein black scanning actuating unit has the structure that the random time in a video frame period begins the black image reading scan.
According to this image display device; Execution is used for the black insertion driving that the Span Continuous frame of video writes black line, and uses any setting of time video demonstration time of beginning black image reading scan and the ratio (rate of black image insertion hereinafter referred to as) that black image shows the time.
In this image display device, black scanning actuating unit can have a kind of function, promptly controls the time with respect to the beginning black image reading scan of video reading scan changeably through the videoscanning actuating unit.Therefore can change the black image insertion rate that is used for each frame arbitrarily.
Image display device can also comprise black insertion rate setup unit, is used at random setting the time that begins the black image reading scan through black scanning actuating unit according to operating environment.Therefore can set the black image insertion rate that is used for each frame from bigger scope according to each user mode.
Image display device according to exemplary embodiment of the present invention can be configured to comprise: display panel; Wherein, Many gate lines and many source electrode lines are arranged to grid and intersect each other respectively, on each point of crossing of gate line and source electrode line, form pixel; Source electrode driver is used for that the black that comprises line image section and black image part is inserted vision signal and alternately offers every source electrode line; And a plurality of gate drivers, with respect to the configuration of each grid line groups, this grid line groups is to be divided into a plurality of groups many gate lines, be used for the gate turn-on signal sequence offer every corresponding gate line; And driving control unit; Has such function: the grid output that signal offers each gate drivers and independent each gate drivers of control is respectively launched in output; The video that control is used to write the line image section begins pulse, and the black display that in a video frame period, will be used to write the black image part at any time begins pulse and outputs to the first grid driver.
According to this image display device; Be each grid line groups configuration gate drivers; This grid line groups is to be divided into a plurality of groups many gate lines; Launching of independent each gate drivers of control, and black display is begun pulse be input to gate drivers being different from time that image begins pulse, so the video that black inserts in driving shows that time and black image show that the ratio (rate of black image insertion hereinafter referred to as) of time can be by adjusting rather than driver segmentation continuously.If the number of gate drivers is more than or equal to 2, then this number can be odd number, therefore when using this product, has increased the flexibility ratio that gate drivers is selected, and can utilize the gate drivers with required minimum freely to set black insertion rate.
In this image display device, driving control unit can also have the black display of controlling changeably with respect to the output of video starting impulse and begin the time that pulse is exported.Thus, begin pulse output, can at random change the black image insertion rate that is used for each frame through changing black display.
In above image display device; Driving control unit can have a kind of function; Promptly; Independently offer each gate drivers: be used for only during the line image section that just black is inserted vision signal offers the cycle of source electrode line, making the grid output effective video of gate drivers to show and launch signal, perhaps be used for only during the black image that just black is inserted vision signal partly offers the cycle of source electrode line, making the grid of gate drivers to export effective black display and launch signal.Thus, can be with respect to the execution of control of video reading scan or black image reading scan independently of each gate drivers.
In above image display device; Each gate drivers can have a kind of function; Promptly; Show that according to video launch signal only will be used for writing the video that black inserts the line part of vision signal to pixel and show that the gate turn-on signal offers corresponding gate line, and launch signal according to black display and only will be used for writing the black display gate turn-on signal that black inserts the black image part of vision signal and offer corresponding gate line to pixel.
Thus, each gate drivers can switch and carry out video reading scan or black image reading scan.
Image display device can also comprise black insertion rate setup unit, is used for setting the time that black display begins pulse output according to operating environment arbitrarily through driving control unit.Thus, can set the black image insertion rate that is used for each frame from bigger scope according to each user mode.
In above image display device; Black insertion rate setup unit can have a kind of function; That is, confirm to be used for the black image insertion rate in each frame period, and set the time that black display begins pulse output according to the black image insertion rate of confirming according to incoming video signal.Thus, can set black image insertion rate according to the content of display video.
In addition; In image display device; Black insertion rate setup unit can have a kind of function,, is stored as the information of a frame of the incoming video signal of importing on each frame sequential ground provisionally that is; The vision signal of a frame of the incoming video signal vision signal with the previous frame of interim storage is compared, and confirm black image insertion rate according to the data that change.Thus, can confirm best black image insertion rate according to the content of display video.
In addition; Image display device also comprises backlight on the back side that is arranged on display panel, and wherein, black insertion rate setup unit can have a kind of function; Promptly; Be stored as the information of a frame of the incoming video signal of each frame sequential ground input provisionally, the vision signal of a frame of the incoming video signal vision signal with the previous frame of interim storage compared, and confirm black image insertion rate and photocontrol brightness backlight according to the data that change.
Thus, insert according to black and to carry out photocontrol, and can prevent owing to when the switching that black inserts causes that brightness changes, carry out black and insert driving to backlight.
In above image display device; Driving control unit can show that launching signal offers gate drivers with video; To begin pulse input according to video the displacement of gate turn-on signal is outputed to every corresponding gate line up to this output termination that is shifted, and can black display be launched signal and offer other gate drivers.Might black display be begun pulsion phase in time and import, and can regulate black image insertion rate continuously for gate drivers with higher flexibility ratio.
Image display device can comprise that black inserts signal conversion unit, is used for black signal is inserted between the line image section of received image signal, and outputs to source electrode driver as black insertion vision signal.Thus, can obtain black and insert vision signal, to let source electrode driver that line image section and black image part are alternately outputed to every source electrode line.
In above image display device, black inserts being characterized as of vision signal, even also comprise black signal in the blanking cycle in incoming video signal.Thus; About writing of the black signal on a plurality of picture frames; Carry out black signal write in addition the blanking cycle between frame in also need not to stop, thereby can eliminating because the interior luminance difference of the face that the difference of the black image hold period in the display panel causes.
In image display device, black inserts being characterized as of vision signal, comprises that grey scale signal replaces black signal.Thus, can alleviate owing to black inserts the brightness reduction that driving causes.
Method according to the driven image display device of exemplary embodiment is that a kind of driving comprises the method like the image display device of lower component: display panel; In this display panel; Many gate lines and many source electrode lines are arranged as with grid respectively and intersect each other, on each point of crossing of gate line and source electrode line, form pixel; Source electrode driver is used for vision signal is offered every source electrode line; A plurality of gate drivers, with respect to the configuration of each grid line groups, this grid line groups is to be divided into a plurality of groups many gate lines, be used for the gate turn-on signal sequence offer every corresponding gate line; And driving control unit, be used for that signal is launched in output and offer each gate drivers independently; This method can comprise: black inserts vision signal step is provided, and wherein, source electrode driver begins that the black that alternately comprises line image section and black image part is inserted vision signal and offers each source electrode line; Video begins the pulse input step, and wherein, the video that driving control unit and black insert vision signal provides step synchronously will be used to write the line image section shows that the beginning pulse is input to the first grid driver; The videoscanning step wherein, is carried out the video reading scan that only will be used for the video that the line image section that black inserts vision signal is written to pixel is offered with showing the gate turn-on signal sequence every gate line from the first grid driver in order; Black display begins the pulse input step, and wherein, the black display that the random time of driving control unit in a picture frame will be used to write the black image part begins pulse and is input to the first grid driver; And the black scanning step, wherein carry out the black image reading scan that only will be used for the black display gate turn-on signal sequence that the black image that black inserts vision signal partly is written to pixel is offered every gate line in order from the first grid driver.
In this driving method; Each gate drivers can show that according to video launching signal comes output video to show the gate turn-on signal in the videoscanning step; This video shows that launching signal is used for only during the line image section that just black is inserted vision signal offers the cycle of source electrode line, making the grid output of gate drivers effective; And can in the black scanning step, launch signal according to black display and come output black to show the gate turn-on signal, this black display is launched signal and is used for only during the black image that just black is inserted vision signal partly offers the cycle of source electrode line, making the grid output of gate drivers effective.
Above driving method can comprise black insertion rate setting step, the sequential that its black display that any setting is exported by driving control unit according to operating environment begins pulse.
According to above driving method; Black insertion rate is set step and can be comprised: the information that is stored as a frame of the incoming video signal of importing on each frame sequential ground provisionally; The vision signal of a frame of the incoming video signal vision signal with the previous frame of interim storage is compared; Data according to changing are confirmed black image insertion rate, and set the sequential that black display begins pulse according to the black image insertion rate of confirming.
In addition; According to this driving method; Black insertion rate is set step and can be comprised: the information that is stored as a frame of the incoming video signal of importing on each frame sequential ground provisionally; The vision signal of a frame of the incoming video signal vision signal with the previous frame of interim storage is compared; Confirm black image insertion rate and be arranged on the photocontrol brightness backlight that the back side of display panel is located in advance according to the data that change, and confirm to set black display according to this and begin the sequential of pulse and photocontrol brightness backlight.
This driving method can insert vision signal at black provides step to comprise that black inserts the conversion of signals step before; Insert black signal between its line image section in received image signal, and output to source electrode driver as black insertion vision signal.
In the above method of driven image display device, black inserts vision signal and is characterised in that, even also comprise black signal in the blanking cycle in incoming video signal.
In the above method of driven image display device, black inserts vision signal can comprise that grey scale signal replaces black signal.
Similar with image display device, according to the method for driven image display device, can consider the balance between the shortcoming of improving fuzzy advantage of live image and reduction brightness, come to set subtly black insertion rate.
The image display device driver is used in the executive program of the operation of control image display device according to an exemplary embodiment of the present invention; This image display device comprises: display panel; Wherein, Many gate lines and many source electrode lines are arranged as with grid respectively and intersect each other, on each point of crossing of gate line and source electrode line, form pixel; Source electrode driver is used for vision signal is offered every source electrode line; A plurality of gate drivers, with respect to the configuration of each grid line groups, this grid line groups is to be divided into a plurality of groups many gate lines, be used for the gate turn-on signal sequence offer every corresponding gate line; Wherein this program comprises: vision signal provides program, the black that alternately comprises line image section and black image part is inserted vision signal output to every source electrode line from source electrode driver; The drive controlling program is launched the grid output that signal offers each gate drivers independently and controls each gate drivers independently with output; Video begins the pulse written-out program, and the video that will be used to write the line image section begins the pulse input and output to the first grid driver; And black display begins the pulse written-out program, and the black display that in a picture frame, will be used to write the black image part at any time begins pulse and is input to the first grid driver.
In above image display device driver; The drive controlling program is specified as such content: video is shown that launch signal or black display launches signal and independently offer each gate drivers; Video shows launches grid output that signal is used for only during the line image section that just black is inserted vision signal offers the cycle of source electrode line, making gate drivers effectively, and black display is launched grid output that signal is used for only during the black image that just black is inserted vision signal partly offers the cycle of source electrode line, making gate drivers effectively.
In addition, the image display device driver can make computing machine carry out black insertion rate setting program, and it sets the sequential of black display scanning sequence arbitrarily according to operating environment.
In above image display device driver; Black insertion rate setting program can be designated as such content: the information that is stored as a frame of the incoming video signal of importing on each frame sequential ground provisionally; The vision signal of a frame of the incoming video signal vision signal with the previous frame of interim storage is compared; Confirm to be used for the black image insertion rate in each frame period according to the data that change, and set the sequential of black display scanning sequence according to the black image insertion rate of confirming.
In addition; According to above image display device driver; Black insertion rate setting program can be designated as has such content: the information that is stored as a frame of the incoming video signal of importing on each frame sequential ground provisionally; The vision signal of a frame of the incoming video signal vision signal with the previous frame of interim storage is compared; Confirm black image insertion rate and be arranged on the photocontrol brightness backlight at the back side place of display panel in advance according to the variable quantity of data, and confirm to set the black display timing for scanning that is used for each grid line groups and photocontrol brightness backlight according to this.
Above image display device driver can make computing machine carry out black and insert the video signal generating program; Insert black signal between its line image section in received image signal, and output to source electrode driver as black insertion vision signal.
In above image display device driver, black inserts vision signal and is characterised in that, even also comprise black signal in the blanking cycle in incoming video signal.
In above image display device driver, black inserts vision signal can comprise that grey scale signal replaces black signal.
Similar with image display device, according to the image display device driver, can consider the balance between the advantage of improving fuzzy advantage of live image and reduction brightness, set black insertion rate subtly.
Though reference example property embodiment specifically illustrates and described the present invention, the invention is not restricted to these embodiment.Persons of ordinary skill in the art may appreciate that do not breaking away under the situation of the spirit and scope of the present invention that limit claim, can make various variations in form and details.
Claims (3)
1. a maintenance image display system is used for will being input to the source electrode line of display panel and vision signal display video on said display panel of gate line through control, and this maintenance image display system comprises:
Source electrode driver is used for vision signal is outputed to said source electrode line;
Gate drivers is used for sweep signal is outputed to said gate line;
Controller is used to receive the vision signal of input and controls said source electrode driver and said gate drivers thus; And
Backlight on the back side of said display panel, wherein
Said gate drivers is made up of two or more gate drivers, is used to each grid line groups and jointly launches grid output;
Said controller is controlled the output that will be input to said each gate drivers independently and is launched signal; The vision signal of wherein between video line, inserting black or grey level is outputed to said source electrode driver; And in a frame period, will be used for beginning pulse signal that one or many writes said video line and be used for the beginning pulse signal that one or many writes black or grey level and output to said gate drivers, and the black frequency band in rolling said display panel screen an image duration;
Said controller is confirmed black or gray scale insertion rate according to showing; And based on said definite black or gray scale insertion rate; Come with respect to being used to write of the input of the said beginning pulse signal of said video line, changing be used to write the sequential of the said beginning pulse signal of said black or grey level to the input of said gate drivers to said gate drivers; And
Said controller relatively more previous vision signal with subsequently in a frame unit and is regulated said photocontrol brightness backlight switching black or gray scale insertion rate, so that can prevent because the brightness that the switching of black or gray scale insertion rate causes changes,
Wherein, Said controller is divided into a plurality of predefined with a frame, and the image that calculates any piece moves to the distance of present frame from previous frame, and according to the maximal value of the displacement of the calculating of each piece; Switch black or gray scale insertion rate continuously, regulate photocontrol brightness backlight.
2. the control device of a maintenance image display system; Be used for the vision signal of the source electrode line through going to display panel in source electrode driver control and be controlled at the signal of the gate line of going to display panel in the gate drivers, on said display panel, drive display video; Said control device comprises:
Controller is used to receive the vision signal of input and controls said source electrode driver and said gate drivers thus;
Said maintenance image display system comprises two or more gate drivers, is used for jointly launching the grid output that is used for each segmentation grid line groups;
Said controller is controlled the output that will be input to said each gate drivers independently and is launched signal; The vision signal of wherein between video line, inserting black or grey level is outputed to said source electrode driver; And in a frame period, will be used for beginning pulse signal that one or many writes said video line and be used for the beginning pulse signal that one or many writes black or grey level and output to said gate drivers, and the black frequency band in rolling said display panel screen an image duration;
Said controller is confirmed black or gray scale insertion rate according to showing; And based on said definite black or gray scale insertion rate; Come with respect to being used to write of the input of the said beginning pulse signal of said video line, changing be used to write the sequential of the said beginning pulse signal of said black or grey level to the input of said gate drivers to said gate drivers; And
Said controller relatively more previous vision signal with subsequently in a frame unit and is regulated photocontrol brightness backlight switching black or gray scale insertion rate, so that can prevent because the brightness that the switching of black or gray scale insertion rate causes changes,
Wherein, Said controller is divided into a plurality of predefined with a frame, and the image that calculates any piece moves to the distance of present frame from previous frame, and according to the maximal value of the displacement of the calculating of each piece; Switch black or gray scale insertion rate continuously, regulate photocontrol brightness backlight.
3. a maintenance method for displaying image is used for will being input to the source electrode line of display panel and vision signal display video on said display panel of gate line through control, and this maintenance method for displaying image comprises:
Vision signal through receiving input is also controlled the source electrode driver and the gate drivers that is used for sweep signal is outputed to said gate line that is used for said vision signal is outputed to said source electrode line thus, comes display video signal;
The vision signal of wherein between video line, inserting black or grey level is outputed to said source electrode driver; And in a frame period, will be used for beginning pulse signal that one or many writes said video line and be used for the beginning pulse signal that one or many writes black or grey level and output to said gate drivers; And the black frequency band in rolling said display panel screen an image duration, so that between the video of said display panel shows, carry out black or gray scale demonstration;
Signal is launched in control output independently, and signal is launched in this output will be input to each in two or more gate drivers, jointly to launch grid output for each grid line groups;
Confirm black or gray scale insertion rate according to showing; And according to said definite black or gray scale insertion rate; Come with respect to being used to write of the input of the said beginning pulse signal of said video line, changing be used to write the sequential of the said beginning pulse signal of said black or grey level to the input of said gate drivers to said gate drivers;
Relatively more previous vision signal with subsequently to be switching black or gray scale insertion rate in a frame unit, and regulates photocontrol brightness backlight, so that can prevent because the brightness that the switching of black or gray scale insertion rate causes changes; And
A frame is divided into a plurality of predefined; The image that calculates any piece moves to the distance of present frame from previous frame; And, switch black or gray scale insertion rate continuously according to the maximal value of the displacement of the calculating of each piece, regulate photocontrol brightness backlight.
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| JP2008052259A (en) * | 2006-07-26 | 2008-03-06 | Toshiba Matsushita Display Technology Co Ltd | Liquid crystal display device |
| JP2008102219A (en) * | 2006-10-17 | 2008-05-01 | Sharp Corp | Video display device |
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2008
- 2008-02-20 JP JP2008039351A patent/JP2008268886A/en active Pending
- 2008-03-31 CN CN2008100907259A patent/CN101276533B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1505809A (en) * | 2001-10-23 | 2004-06-16 | 松下电器产业株式会社 | Liquid crystal display and its driving method |
| CN1908742A (en) * | 2005-08-02 | 2007-02-07 | Lg.菲利浦Lcd株式会社 | Method of providing data, liquid crystal display device and driving method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014032412A (en) | 2014-02-20 |
| JP6004344B2 (en) | 2016-10-05 |
| CN101276533A (en) | 2008-10-01 |
| JP2008268886A (en) | 2008-11-06 |
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