CN100371811C - Quick gray scale transform method for liquid crystal display - Google Patents
Quick gray scale transform method for liquid crystal display Download PDFInfo
- Publication number
- CN100371811C CN100371811C CNB2004100327908A CN200410032790A CN100371811C CN 100371811 C CN100371811 C CN 100371811C CN B2004100327908 A CNB2004100327908 A CN B2004100327908A CN 200410032790 A CN200410032790 A CN 200410032790A CN 100371811 C CN100371811 C CN 100371811C
- Authority
- CN
- China
- Prior art keywords
- gate lines
- area
- liquid crystal
- time
- crystal display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The present invention relates to a rapid grey scale conversion method for a liquid crystal display, which comprises the steps: a driving gate line area of a liquid crystal display is divided into a plurality of areas, and the frame interval time of the liquid crystal display is divided into a plurality of sub sections corresponding to a plurality of gate line areas; within the time of a synchronous driving signal, first gate lines of each area are orderly switched on; next, secondary gate lines of each area are orderly switched on; the previous step is repeated, wherein the data voltage of image data is applied to at least one group of gate lines, and the voltage for displaying black pictures is applied to at least one group of gate lines; the previous step is repeated, and until the entire pattern frame interval time ends, next pattern frame space is turned into. Through the division of time and space, the purpose of rapid grey scale conversion is achieved. The rapid grey scale conversion method of the present invention is suitable for the picture treatment of various liquid crystal displays and organic light emitting diode (OLED) displays.
Description
Technical Field
The invention relates to a method for fast gray scale conversion of a liquid crystal display, in particular to a method, which divides the space of the display and the frame interval time of data, controls the voltage of grid lines of each subinterval simultaneously by a synchronous control signal, firstly provides the voltage capable of reaching the brightness to be presented, and then provides the voltage for presenting a black picture after reaching the brightness to be presented to carry out fast gray scale conversion, thereby improving the phenomenon of ghost shadow or image overlapping of the liquid crystal display and being suitable for picture processing of various liquid crystal displays and Organic Light Emitting Diode (OLED) displays.
Background
The popularity of liquid crystal displays is mainly related to the advantages of low power consumption, light weight, no radiation, no flicker, etc. compared to conventional Cathode Ray Tube (CRT) displays, and they are applicable to digital televisions, notebook computers or computer screens, and thus are becoming the mainstream of the display industry.
However, the liquid crystal molecules have limitations and disadvantages due to their characteristics such as viscosity, elastic modulus, and dielectric constant. First, please refer to fig. 1A and fig. 1B, which are schematic diagrams of a liquid crystal display, wherein a data driver 11 is disposed above a display panel 10 for converting adjusted gray-scale signal data into corresponding data voltages and outputting image signals to the display panel 10 via a plurality of data lines 111 connected to the data driver 11, a gate driver 12 is disposed at a side of the display panel 10 for continuously supplying scanning signals and transmitting the scanning signals to the display panel 10 via a plurality of gate lines 121 connected to the gate driver 12, the data lines 111 and the gate lines 121 are vertically crossed and insulated from each other, and a pixel matrix 13 is surrounded by the data lines 111 and the gate lines 121.
When the video signal is sent from the data driver 11, it is transmitted through the data line D 1 Providing crystals within the pixel matrix 13Tube Q 1 And the gate driver 12 also sends out control signals via the gate line G 1 Is provided to the transistor Q 1 The output voltage value is outputted through the circuit in the pixel matrix 13 to drive the liquid crystal molecules corresponding to the pixel matrix to react, and the liquid crystal molecules between the two glass substrates of the display panel 10 form a parallel plate capacitor C LC (capacitor) since the capacitor cannot hold the voltage until the next frame data is updated, a storage capacitor C is added S (Storagecapacitor) to allow the charged capacitor to Hold the voltage until the next frame update, this type of display is called Hold type.
Although the brightness between the frames of the lcd can be maintained, the problem of the flickering of the frames of the conventional CRT display is not generated, but a new problem, namely, the afterimage phenomenon (afterimage), is generated. As illustrated in FIG. 2, each Frame (Frame) F is represented on a time axis 1 ，F 2 ，F 3 ，F 4 When the time of reaching the brightness occupies most of the time of the display of the picture, the image of the previous picture is overlapped with the image of the next picture on the display screen, so that the image blurring phenomenon is caused. In fact, some liquid crystal displays have a fast brightness change when they are turned up and a slow brightness change when they are turned down, which is more likely to cause image sticking during image conversion.
In the conventional CRT display, the electron beam is irradiated onto the screen coated with the luminescent material through the end of the vacuum tube to display the color of the picture, and the color generated by the luminescent material on the screen is excited only for a moment and then disappears to wait for the excitation of the image data of the next picture.
Therefore, in order to solve the disadvantage of the LCD ghost phenomenon and capture the advantages of the Impulse type of the CRT display, a simulation pulse (Pseudo Impulse type) technique is currently used to present the image data, and the following two techniques can be theoretically applied to achieve the purpose:
(1) Inserting black data or black frames in the continuous image frames: as shown in FIG. 3, in the continuous image frame F -1 ，F 2 ，F 3 ，F 4 In the middle, black picture B 1 ，B 2 ，B 3 Inserting, and forcing the brightness of the second half time in the frame interval to disappear so as to simulate the display mode of CRT.
(2) Inserting a black picture signal into the backlight source, and flashing the backlight source: as shown in FIG. 3, the brightness of each screen is provided by a light source behind the display panel, and the continuous backlight source is L 1 ，L 2 ，L 3 ，L 4 Now, a black picture signal is inserted into each backlight source to force the light source to be turned off to generate a black picture B 1 ，B 2 ，B 3 The effect of simulating CRT imaging is also obtained, and the ghost phenomenon can be eliminated.
In view of the above, the inventor of the present invention has long worked in the display industry, accumulated many years of research and development experience in this field, and proposed a novel fast gray-scale conversion method to simulate the CRT impulse type image display method and eliminate the image sticking problem of the liquid crystal display.
Disclosure of Invention
The main objective of the present invention is to provide a fast gray scale conversion method for liquid crystal display, which divides the space and frame interval of the display, and controls the gate line voltage of each sub-interval via the synchronous control signal, so that the liquid crystal display can provide the voltage for displaying the black picture after reaching the desired brightness, and the voltage can make fast gray scale conversion, thereby improving the phenomenon of the ghost or image overlap of the liquid crystal display.
In order to achieve the above object, the method of the present invention comprises:
a. dividing the driving gate lines of the LCD into M regions from top to bottom, wherein the total gate lines are Q, and the first region comprises M gate lines 1 Strips, second zone being m 2 The Mth zone contains M M Strips, i.e.
The number of gate lines (m) included in each region i ) The ratio of the total grid line number (Q) to the total grid line number is
Thus, it is possible to
The ratio p i Is set according to the characteristics of the LCD, can be set to a fixed value and can be adjusted, and M is greater than or equal to 2Is less than or equal to the maximum value of the synchronization control signal generated by the display panel, and the preferred number of M is between 2 and 6 in terms of the current technology level.
b. Dividing the frame interval time T of the LCD into M sub-intervals (sub-intervals), wherein the interval time of each sub-interval is T i ＝p i T, i.e.
c. Sequentially turning on a first gate line of a first area, a second area and an Mth area within the time of a synchronous control signal, and then sequentially turning on a second gate line of the first area, the second area and the Mth area within the time of a next synchronous control signal, repeating the step, so that the synchronous control signal simultaneously turns on a plurality of gate lines in the same scanning area, wherein the number of the gate lines ranges from 2 to the number of the gate lines of the first area, K groups of gate lines give data voltages of image data, J groups of gate lines give voltages for displaying a black picture or darkening a picture, K and J are positive integers, and K + J = M; j andthe amount of K is related to the response characteristic of the LCD, and can be determined by observing the response curve through pre-measurement. Wherein the frame image of the i-th area after scanning is separated from the frame image of the previous area (i-1 st area) by a distance t i Time phase difference of (a).
d. Repeating the above steps until the whole frame interval time T is finished, and finishing the frame image scanning.
By the above steps, the liquid crystal display can be driven quickly by dividing the time (frame interval time) and the space (gate line) and respectively applying the data voltage and the voltage for displaying the black picture, so as to improve the image gray scale response speed.
As can be seen from the above description, the present invention is characterized in that the gate line area space of the display panel is divided into a plurality of areas, the frame interval time is divided into a plurality of sub-intervals, each area is sequentially scanned within a synchronous control signal time, and a frame in frame is formed in both time and space.
Drawings
FIG. 1A is a schematic diagram of a simplified structure of a liquid crystal display;
FIG. 1B is an enlarged partial schematic view of FIG. 1A;
FIG. 2 is a graph comparing a luminance variation curve (a) of a liquid crystal display with a luminance variation curve (b) of a conventional cathode ray tube display;
FIG. 3 is a schematic diagram of a prior art simulated impulse display of a liquid crystal display;
FIG. 4 is a graph showing the variation of image brightness versus time at various driving voltages;
FIG. 5 is a diagram illustrating a voltage variation and a brightness variation curve when two gate lines are controlled synchronously according to a first embodiment of the present invention;
FIG. 6A shows the present invention at a first time and a second time (t) 1 In time) to synchronously control two gate lines in a first embodiment of the display panel;
FIG. 6B shows the present invention at 1/2T time (T) 1 In time) and the 1 st/2T +1 time (t) 2 In time) to synchronously control two gate lines on the display panel;
FIG. 6C shows the present invention at a first time and a second time (t) 1 Time) simultaneously turning on two gate lines in the same scanning area;
FIG. 7 is a diagram illustrating a voltage variation and a luminance variation curve when a gate line is divided into three regions to synchronously control and transmit three gate lines according to a second embodiment of the present invention;
FIG. 8A shows the present invention at a first time and a second time (t) 1 In time) to synchronously control the transmission of three gate lines to the display panel;
FIG. 8B shows the present invention at 1/3T time (T) 1 In time) and the 1 st/3T +1 time (t) 2 In time) to synchronously control three gate lines on the display panel.
Description of the symbols:
10: display panel
11: data driver
111: data line
12: gate driver
121: gate line
13: pixel matrix
21, 22, 23, 24, 25: different brightness change curves corresponding to different voltages
40, 50: display panel
41, 51: gate driver
Detailed Description
Please refer to the drawings4, because the characteristics of the panels of the LCD are different, when the method is applied, the characteristics of the panel of the LCD are analyzed first by setting a time t to reach a predetermined brightness 0 Taking the gray level code120 as an example, assume that the voltage V is 5 Can make the display panel at time t 0 The brightness variation curve of the code120 to be displayed is recorded as shown in FIG. 4 by reference numeral 25, and then different voltages V are applied 1 、V 2 、V 3 、V 4 The LCD panel is driven to reach the preset brightness, the continuous change curve of each image brightness to time is shown as the reference numbers 21, 22, 23 and 24, finally the different brightness changes and the corresponding voltages which can be presented by the display panel are completed, the curve change data and the corresponding voltages are made into a comparison table (lookup table) as the basis for setting the brightness of the driving panel, in each embodiment, the voltage which can reach the brightness to be presented in the comparison table is used for driving, if the characteristic of the liquid crystal is limited, the voltage can be additionally reinforced by other components of the LCD, such as a backlight module for reinforcing the display, and the like.
In addition, the gray scale value 0 of the display is a black frame with complete black and no brightness, however, in the definition of the present invention, the gray scale value of the black frame to be presented on the liquid crystal display is below a certain value, which can be regarded as the black frame, such as codes 5 to 10, and in the following description, the code0 is used to represent the black frame or the voltage for darkening the frame.
The first embodiment:
in order to clearly express the technical features of the present invention, the embodiment of synchronously transmitting two scanning signals by dividing the gate lines of the lcd into 2 regions is described.
Referring to fig. 5, 6A and 6B, fig. 5 is a graph showing the output driving voltage waveform and the luminance variation curve (a) (B) of a pixel at a gate line position on a display panel, wherein the horizontal axis shows the output driving voltage waveform and the luminance variation curveThe interval is divided into two sub-intervals T, where the unit is ms and the frame interval is T 1 ，t 2 And t is 1 ∶ t 2 Fig. 6A shows that the gate lines on the display panel 40 are divided into two regions M 1 ，M 2 Assuming that the number of gate lines in the first region is m, the number of gate lines in the second region is also m, and the total number of gate lines is 2m, the ratio of the number of gate lines in the two regions is 1: 1.
Assuming that the brightness of a continuous image data from a previous Frame interval (Frame N-1) to a Frame interval (Frame N) is code120, the brightness can be selected from a look-up table (LUT) to drive the display panel 40, so that the display panel 40 reaches the brightness within a specific time, the fast gray-scale conversion method of the present invention is as follows:
in a first subinterval t 1 In the first region M, the gate driver 41 synchronously turns on two gate lines on the display panel 40 1 First gate line G of 1 A data voltage code120 given to the frame interval N in the second region M 2 First gate line G of m+1 The voltage code0 for displaying black frames is given to the previous frame interval N-1, then the next gate line of each region is sequentially and synchronously turned on, and the same voltage value as the previous gate line is given, that is, the same voltage value is given to the gate line of the same region until the scanning of each region is completed, and the luminance change curve generated by the data voltage code120 is shown in fig. 5 (a).
Into a second subinterval t 2 At this time, referring to fig. 6B, the gate driver 41 synchronously turns on two gate lines on the display panel 40 and in the first region M 1 First gate line G of 1 Applying a voltage code0 to the black display screen in the second region M 2 First gate line G of m+1 The data voltage code120 in the frame is given, then the next gate line in each region is sequentially and synchronously turned on, and the same voltage value as the previous gate line is given until the scanning of each region is completed, and the brightness change curve generated by the data voltage code0 is shown in fig. 5 (b).
With respect to the first region M of the space of this embodiment 1 And a second region M 2 The case of completing the image scanning is described below,in the first region M 1 At t 1 At time, the desired brightness is reached by driving the data voltage code120 at the frame interval N, at t 2 At the time, the luminance is lost by being driven by the voltage code0 for displaying the black screen.
And a second region M 2 At t, of the gate line of (1) 1 At time, the display is subjected to black pictureThe driving of the voltage code0 darkens the picture, which represents the black picture at the end sub-interval time of the previous frame interval N-1, and at t 2 During the time, the brightness is driven by the data voltage code120 of the frame interval N, and the brightness of the data of the first subinterval time of the frame interval N is represented; therefore, the invention can simultaneously divide the display picture space and the picture frame interval time into the areas to carry out synchronous signal control, so that the picture in each area can be darkened immediately after reaching the brightness to be presented, and the aim of rapidly converting the gray scale expression is fulfilled.
The synchronous signal of the above embodiment turns on two gate lines to indicate a time difference between the two gate lines, but in practice, it can also turn on and drive multiple gate lines in each scanning area at the same time, as shown in fig. 6C, during the first sub-interval t 1 In the first region M, the gate driver 41 simultaneously turns on two gate lines in the same scan region on the display panel 40 1 First gate line G of 1 And a second gate line G 2 Simultaneously applying a data voltage code120 of frame interval N, and after a time difference, a second region M 2 First gate line G of m+1 And a second gate line G m+2 Simultaneously providing a voltage code0 for displaying a black picture, sequentially and simultaneously starting the next two grid lines of each area, and providing the same voltage value for the grid lines of the same area until the scanning of each area is finished and the time is the same after entering the next subinterval, thereby achieving the purpose of quick gray scale conversion.
The ratio of the number of gate lines to the total number of gate lines in each region will determine t 1 And t 2 If the response of the liquid crystal moleculesThe speed is fast, the ratio can be reduced, otherwise, the ratio is increased, the time for the liquid crystal molecules to reach the desired brightness is prolonged, the value can be adjusted or fixed, and is determined by the characteristics of the display panel.
Second embodiment:
referring to fig. 7, fig. 8A and fig. 8B, the second embodiment further illustrates that the gate line is divided into 3 regions to synchronously control three scanning signals, and referring to fig. 7, which is a graph (a) (B) of the output driving voltage waveform and the brightness variation of a pixel at a gate line position on a display panel 50, wherein the horizontal axis represents time in ms, the frame interval time is T, and the graph is divided into two sub-regions T 1 ，t 2 ，t 3 ，t 1 ∶ t 2 ∶t 3 = 1: 1, referring to fig. 8A again, set the gate lines on the display panel 50 to be divided into three regions M 1 ，M 2 ，M 3 Assuming that the number of gate lines of the first region is m, the number of gate lines of the second region is m, the first regionThe number of grid lines in the three regions is also m, the number of total grid lines is 3m, and the ratio of the number of grid lines in the two regions is 1: 1.
As shown in fig. 7, assuming that the brightness of a continuous image data from the previous Frame interval (Frame N-1) to the Frame interval (Frame N) is code120, the brightness can be selected from a look-up table (LUT) to drive the display panel 50, so that the display panel 50 reaches the brightness within a specific time, the fast gray-level conversion method of the present invention is as follows:
in a first subinterval t 1 At this time, the gate driver 51 synchronously turns on three gate lines G 1 ，G m+1 ，G 2m+1 On the display panel 50 and in the first region M 1 First gate line G of 1 Giving a data voltage code120 of frame interval N in the other two regions M 2 ，M 3 First gate line G of m+1 ，G 2m+1 Giving a voltage code0 of a black picture representing a last subinterval time of a previous frame interval N-1, sequentially and synchronously turning on a next gate line of each area, and giving a voltage corresponding to the previous gate lineThe same voltage value, that is, the same gate line of the same region is given the same voltage value until the scanning of each region is completed, and the data voltage code120 generates a luminance variation curve as shown in fig. 7 (a).
Into a second subinterval t 2 Referring to FIG. 8B, the gate driver 51 synchronously turns on three gate lines on the display panel 50, the first region M 1 And a third region M 3 A voltage code0 given to a black picture in a sub-interval of the last period of the previous frame interval N-1, a second region M 2 The data voltage code120 is applied to the frame interval N to sequentially turn on the gate lines of each region within a synchronous control signal time until the scanning of each region is completed.
Into a third subinterval t 3 While, the first zone M 1 And a second region M 2 The gate line of the display panel supplies a black picture voltage code0 to a last subinterval of an interval N-1 of a previous picture frame, and a third area M 3 The gate lines of (1) are applied with a data voltage code120 of frame interval N until the scanning of each region is completed, wherein in the sub-region t 2 、 t 3 The luminance change curve of (2) is shown in fig. 7 (b).
M of the space of the present embodiment is explained below 1 、M 2 And M 3 Respectively completing the image scanning situation, and regarding the first region M 1 At t 1 At time t, the frame is driven by the data voltage code120 of the frame interval N 2 And t 3 In the sub-interval time, a voltage code0 is applied to the black picture.
And in the second region M 2 At t 1 Giving the previous frame a sub-interval timeVoltage code0 of black picture spaced by N-1 end subinterval at t 2 Time-wise, a data voltage code120 is given to the frame interval N, at t 3 Voltage code0 given to a black picture at time; the completed image scanning and the first region M 1 Presents a time difference t 2 。
Then, regarding the third region M 3 At t, of the gate line of (2) 1 、t 2 Time of subinterval ofWhen the voltage code0 is given to the black picture of the last subinterval of the previous frame interval N-1, and at t 3 Time-wise, a data voltage code120 is given to the frame interval N, the completed image scanning and the second region M 2 Presents a time difference t 3 。
By analogy with the two embodiments, the present invention can also be applied to synchronously turn on M groups of gate lines and divide the scanning area of the liquid crystal display into M areas to achieve the purpose of the invention, and the method is described as follows:
a. dividing the driving gate lines of the LCD into M regions from top to bottom, wherein the total gate lines are Q, and the first region comprises M gate lines 1 Strips, second zone m 2 The mth zone contains M M Strips, i.e.
Wherein each region includes the number of gate lines (m) i ) The ratio of the total number (Q) of gate lines is
Thus, therefore, it is
The ratio p i The control circuit is set according to the characteristics of the liquid crystal display, can be set to a fixed value and can also be adjusted, wherein M is an integer which is more than or equal to 2 and is less than or equal to the maximum value of the synchronous control signals which can be generated by the display panel.
b. Corresponding to the M gate lines, the frame interval time T of the LCD is divided into M subintervals, where the interval time of each subinterval is T i ＝p i T, i.e.
c. Sequentially turning on a first gate line of a first area, a second area and an Mth area within a time of a synchronous control signal, and then sequentially turning on a second gate line of the first area, the second area and the Mth area within a time of a next synchronous control signal, and repeating the steps, wherein K groups of gate lines provide data voltages of image data, J groups of gate lines provide voltages for displaying a black picture, K and J are positive integers, and K + J = M.
The number of J and K is related to the response characteristic of the LCD, and can be determined by observing the response curve through pre-measurement, if the second embodiment is used, K is 1 and J is 2.
d. Repeating the above steps until the whole frame interval time T is over and entering the next frame interval, wherein the frame image scanned in the ith area is separated from the frame image in the previous area (i-1 area) by the distance T i Time phase difference of (a).
Through the above steps, the liquid crystal display achieves the purpose of fast gray scale conversion by dividing time (frame interval time) and space (gate line) and respectively providing data voltage and voltage of black frame, and in terms of the current technical level, the preferable number of M is 2 to 6, and in addition, the synchronous control signal can simultaneously open a plurality of gate lines in each scanning area, the range of the gate line number is 2 to the gate line number of the first area, or the liquid crystal display can simultaneously open all the gate lines, or can scan in a frequency doubling mode. The driving method of the invention can be applied to various liquid crystal displays, active matrix type liquid crystal displays and Organic Light Emitting Diode (OLED) displays.
Therefore, the invention has the following advantages:
1. the frame in frame technology is used to make the liquid crystal display perform fast gray scale conversion, so as to achieve the purpose of improving the ghost phenomenon of the display.
Besides dividing the scanning area of the display panel, the proportion of each scanning area can be adjusted and fixed according to the characteristics of the panel, and the display panel can be suitable for various display panels, thereby having great industrial utilization value.
In summary, the present invention can achieve the desired objective and provide a method for achieving fast gray scale conversion of a liquid crystal display.
Claims (8)
1. A method for fast gray scale conversion of a liquid crystal display comprises the following steps:
a. dividing the driving gate lines of the LCD into M regions from top to bottom, wherein the total gate lines are Q, and the first region comprises M gate lines 1 Strips, second zone being m 2 Zone M comprises M M Strips, i.e. of
Wherein each region comprises a number m of gate lines i The ratio of the total number of gate lines Q to the total number of gate lines Q is
Thus, it is possible to provide
b. Dividing the frame interval time T of the LCD into M sub-intervals corresponding to the M gate lines, wherein the interval time of each sub-interval is T i ＝p i T, i.e.
c. Sequentially starting a first grid line of a first area, a second area and an Mth area within the time of a synchronous control signal, and then sequentially starting a second grid line of the first area, the second area and the Mth area within the time of a next synchronous control signal, and repeating the step to enable the synchronous control signal to simultaneously start a plurality of grid lines in the same scanning area, wherein the grid line number ranges from 2 to the grid line number of the first area; wherein K groups of gate lines give data voltages for image data, J groups of gate lines give voltages for displaying a black picture or dimming a picture, K, J are positive integers, and K + J = M;
d. repeating the above steps until the whole frame interval time T is over and the next frame interval is entered, wherein the frame image of the i-th area is scanned and the frame image of the previous area has a distance T i The time phase difference of (a);
by the steps, the gray scale conversion of the liquid crystal display can be rapidly carried out by dividing the frame interval time and the grid line and respectively providing the data voltage and the voltage of the black picture.
2. The method of fast gray scale conversion of a liquid crystal display according to claim 1, wherein the ratio p i The display device is set according to the characteristics of the liquid crystal display, and can be set as a fixed value or adjusted.
3. The method of claim 1, wherein M is an integer greater than or equal to 2, less than the maximum value of the synchronous control signal generated by the display panel.
4. The method of fast gray scale conversion of a liquid crystal display according to claim 3, wherein the number of M is between 2 and 6.
5. The method of claim 1 wherein the quantities of J and K are related to the response characteristics of the LCD, and are determined by pre-measuring the response curve.
6. The method of claim 1, wherein the black frame is a relatively black frame and is adjusted according to the background brightness to turn the frame black.
7. The method of claim 1, wherein the method is suitable for use in AMLCD and OLED displays.
8. The method of claim 1, wherein the LCD is capable of being turned on all gate lines simultaneously or scanned in a frequency doubling manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100327908A CN100371811C (en) | 2004-04-21 | 2004-04-21 | Quick gray scale transform method for liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100327908A CN100371811C (en) | 2004-04-21 | 2004-04-21 | Quick gray scale transform method for liquid crystal display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1690816A CN1690816A (en) | 2005-11-02 |
| CN100371811C true CN100371811C (en) | 2008-02-27 |
Family
ID=35346347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100327908A Expired - Fee Related CN100371811C (en) | 2004-04-21 | 2004-04-21 | Quick gray scale transform method for liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100371811C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102750922B (en) * | 2012-07-05 | 2015-07-01 | 青岛海信电器股份有限公司 | Method and device for driving liquid crystal display, and liquid crystal television |
| CN103197456B (en) * | 2013-04-24 | 2016-03-30 | 深圳市华星光电技术有限公司 | Liquid crystal display and improve method, the driving circuit of liquid crystal display horizontal black bars |
| CN107507586B (en) * | 2017-08-25 | 2019-11-29 | 惠科股份有限公司 | Driving device and display panel |
| CN109817167B (en) * | 2019-02-26 | 2020-08-11 | 江西兴泰科技有限公司 | Drive waveform debugging method for eliminating residual heterochromatic particles in three-color electronic paper module display |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1251932A (en) * | 1998-10-15 | 2000-05-03 | 国际商业机器公司 | Display unit |
| CN1279459A (en) * | 1999-06-15 | 2001-01-10 | 夏普公司 | Liquid crystal display method and device for improving quality of cartooon pictures |
| US6396469B1 (en) * | 1997-09-12 | 2002-05-28 | International Business Machines Corporation | Method of displaying an image on liquid crystal display and a liquid crystal display |
-
2004
- 2004-04-21 CN CNB2004100327908A patent/CN100371811C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6396469B1 (en) * | 1997-09-12 | 2002-05-28 | International Business Machines Corporation | Method of displaying an image on liquid crystal display and a liquid crystal display |
| CN1251932A (en) * | 1998-10-15 | 2000-05-03 | 国际商业机器公司 | Display unit |
| CN1279459A (en) * | 1999-06-15 | 2001-01-10 | 夏普公司 | Liquid crystal display method and device for improving quality of cartooon pictures |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1690816A (en) | 2005-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7898519B2 (en) | Method for overdriving a backlit display | |
| US8063922B2 (en) | Liquid crystal display device | |
| US8648780B2 (en) | Motion adaptive black data insertion | |
| CN103680382B (en) | Display drive method and its integrated driving equipment | |
| JP3688574B2 (en) | Liquid crystal display device and light source device | |
| US7636099B2 (en) | Driving device for quickly changing the gray level of the liquid crystal display and its driving method | |
| US7911430B2 (en) | Liquid crystal display | |
| US20050162416A1 (en) | Method of display by sub-frame driving | |
| EP1927974A2 (en) | Liquid crystal display with area adaptive backlight | |
| US20070070019A1 (en) | Method and apparatus for driving liquid crystal display | |
| JP2002207463A (en) | Liquid crystal display device | |
| CN109166553B (en) | Liquid crystal display device and driving method thereof | |
| JP4938831B2 (en) | Light emitting device and driving method thereof | |
| US20050275645A1 (en) | Method of increasing image gray-scale response speed | |
| JP2004117758A (en) | Display device and its driving method | |
| CN100371811C (en) | Quick gray scale transform method for liquid crystal display | |
| JP2001296838A (en) | Liquid crystal display device | |
| JP2002149132A (en) | Liquid crystal display device | |
| US20050275644A1 (en) | Method of fast gray-scale converting of LCD | |
| JP4995370B2 (en) | Display device | |
| US6933918B1 (en) | Method and apparatus for driving liquid crystal display | |
| KR100631018B1 (en) | Method for driving of liquid crystal display device | |
| CN100371781C (en) | Method for improving image gray level response speed | |
| JP4162626B2 (en) | LCD overdrive method | |
| TWI326864B (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080227 Termination date: 20160421 |