JP2005321700A - Method of fast gray scale conversion in lcd - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of fast gray scale conversion in an LCD, which can be applied for various types of LCDs and OLED (organic light emitting diode) displays. <P>SOLUTION: The method mainly includes steps of: dividing LCD driving gate lines into a plurality of segments; dividing the frame interval period of the LCD into a plurality of sub intervals with respect to the plurality of gate lines segments; sequentially starting a first gate line in each segment, then starting the gate line in each segment within the period of a simultaneous control signal and repeating this procedure while a data voltage of picture data is supplied through at least one group of gate lines and a voltage to display a black screen is supplied through at least one group of gate lines; repeating these steps after the whole frame interval period is completed and until the next frame interval starts. Thus, fast gray scale conversion in the LCD is achieved through division of time and space. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention belongs to the technical field of a method for rapid gray scale conversion of a kind of LCD. In particular, the LCD space and the data frame interval time are divided, and the gate line voltage of each auxiliary space is simultaneously controlled by the simultaneous control signal, providing the voltage that can reach the brightness to be displayed first. After reaching the desired brightness, it provides a voltage to display a black screen, thereby rapidly changing gray scale, improving the phenomenon of LCD afterimages or overlapping images, and LCD and OLED display screens. It relates to the method of rapid gray scale conversion of LCD applied to processing.

Compared to known CRT displays, LCDs have advantages such as low power consumption, thin and light, no radiation, no flashing, so they are being applied to digital TVs, notebook PCs, PC screens, etc. It is becoming mainstream in the display industry.
However, there are still limitations and disadvantages due to the characteristics of liquid crystal molecules such as viscosity coefficient, elasticity coefficient, and conduction coefficient.

As shown in FIGS. 1 and 2, a data controller 11 is installed above the display panel 10 to convert the already adjusted grayscale signal data into a corresponding data voltage. In addition, a video signal is output to the display panel 10 through a plurality of data lines 111 connected to the data controller 11. A gate controller 12 is installed on the side of the display panel 10 to provide scanning signals continuously. In addition, a scanning signal is transmitted to the display panel 10 by a plurality of gate lines 121 connected to the gate controller 12. Since the data line 111 and the gate line 121 cross each other perpendicularly and are in an insulated state, the surrounded area becomes the pixel array 13.
When the video signal is sent out from the data controller 11, via the data lines D _1, to provide a source of the transistor to Q ₁ in the pixel array 13. The gate controller 12 also sends out a relative control signal, via the gate lines G ₁ to provide the gate of the transistor Q _1. Further, the circuit in the pixel array 13 outputs the output voltage value, and the pixel array drives the corresponding liquid crystal molecule reaction. Liquid crystal molecules between two glass substrates located on the display panel 10 form a liquid crystal capacitor C _LC (Capacitor of liquid crystal). Voltage until the capacitor can not be holding the voltage until the next update the screen data, further installed power storage device C _S a (Storage Capacitor), the charged capacitor is next to update the screen data Be able to hold. This type of video display method is called a hold method.
In LCD, while maintaining the brightness between the screens, the problem of blinking of the screen as in the known CRT display does not occur, but a new problem, that is, an after image phenomenon (After image) occurs. As shown in FIG. 3, each of the frames (Frames) F ₁ , F ₂ , F ₃ , and F ₄ on the time axis needs to display different brightness, but the rotation of the liquid crystal molecules drives to change the brightness. Since time is required for this, the change in brightness and the correspondence with time become a curve change as shown in FIG. After reaching the lightness to be displayed, the lightness is maintained with the voltage value. If the time when the brightness is reached occupies most of the screen display time, the image on the previous screen and the image on the subsequent screen are displayed on the display screen so that the image is blurred. This is the afterimage phenomenon. In fact, some LCDs have a relatively fast increase in brightness, but they are slow when descending, and are more likely to cause afterimages when changing screens.

A known CRT display irradiates an electron beam onto a screen coated with a luminescent material by a vacuum tube end to display the color of the screen. The color produced by the light-emitting material on the screen is momentarily short, then disappears again, and waits for the next screen image data to be induced. This type of video display method is called an impulse type video display method, and the brightness change curve of the video display is shown in FIG. 3 (b). In this method, an afterimage is generated between the screens. The phenomenon does not occur.
In response to the above, the advantages of the impulse method of the CRT display are incorporated to solve the drawbacks of the LCD afterimage phenomenon. The video data display method based on a kind of pseudo impulse type technology currently employed can theoretically achieve this purpose by applying the following two types of technologies.
(1) Insert black data or black screen into the continuous video screen. As shown in FIG. 4, black screens B ₁ , B ₂ , and B ₃ are inserted in the continuous video screens F ₁ , F ₂ , F ₃ , and F ₄ , and the brightness of the latter half time portion within the frame interval is forcibly inserted. And imitate the CRT video display system.
(2) Insert a black screen signal into the backlight and blink the backlight. As shown in FIG. 4, the brightness of each screen is originally provided by the light source behind the display panel, and the continuous backlights are L ₁ , L ₂ , L ₃ , and L ₄ . By inserting a black screen signal into each backlight and closing the black screen B ₁ , B ₂ , B ₃ where the light source is forcibly generated, the CRT image display effect can be imitated and the afterimage phenomenon can be eliminated. it can.

The present invention provides a method for rapid gray scale conversion of an LCD that solves the problem of the afterimage phenomenon of the LCD by a pseudo CRT impulse image display method.

で、各区が含むゲート線の数（m_i）と総ゲート線数（Q）間の比率は

である。よって

で、該比率p_iはLCDの特性に基づき設定し、固定値、或いは調整可能に設定することができる。該Mは2の整数以上で、ディスプレーパネルが生じることができる同時制御信号の最大値以下である。現在の技術レベルから言えば、Mは２から６の間であることが望ましい。
ii. LCDのフレーム間隔時間TはM個補助間隔（sub-interval）に区分される。各補助間隔の間隔時間はそれぞれ

、すなわち

である。
iii. 同時制御信号の時間内において、順番に第一区、第二区…及び第M区の第一ゲート線を起動し、続いて次の同時制御信号の時間内において、順番に第一区、第二区…及び第M区の第二ゲート線を起動し、このステップを繰り返す。K組ゲート線は映像データのデータ電圧を提供し、J組ゲート線は黒色画面を表示する電圧を提供する。K,Jは正の整数でしかもK+J=Mである。JとKの数量はLCDの反応特性と関連があり、予め測量、観察したその反応曲線に基づき決定する。その内、第i区の走査完成のフレーム映像は前の区(第i-1区)フレーム映像との距離 t_i の時間位相差である。
iv. フレーム間隔時間T全体が終了するまで上記ステップを繰り返し、該フレーム映像の走査を完成する。
上述のステップにより、時間（フレーム間隔時間）と空間（ゲート線）の分割を通して、並びにそれぞれデータ電圧と黒色画面の電圧を提供し、LCDは快速グレースケール転換の目的を達成し、その映像グレースケールの反応速度を速くすることができ、
ディスプレーパネルのゲート線区域空間は複数区域に分割され、この複数区域に対応し、フレーム間隔時間は複数の補助間隔に分割され、同時制御信号時間内において、順番にそれぞれ各区域に対して走査を行い、時間と空間上共に”frame in frame”の状況を形成することを特徴とするLCDの快速グレースケール転換の方法である。 In order to solve the above-mentioned problems, the present invention provides the following rapid gray scale conversion method for LCD.
It mainly divides the display space and frame interval time, and controls the gate line voltage of each auxiliary interval at the same time by the simultaneous control signal, so that the LCD displays the black screen after reaching the desired brightness. Provide fast gray scale conversion, thus improving the afterimage of LCD or video duplication phenomenon,
The method of the present invention includes the following steps:
i. Divide the LCD drive gate lines into M sections from top to bottom, and let the total number of gate lines be Q. The first section includes m ₁ gate lines, the second section includes m ₂ lines, and the M section includes _MM gate lines. That is,

The ratio between the number of gate lines (m _i ) and the total number of gate lines (Q) included in each section is

It is. Therefore

Thus, the ratio p _i is set based on the characteristics of the LCD, and can be set to a fixed value or adjustable. The M is an integer greater than or equal to 2 and less than or equal to the maximum value of the simultaneous control signal that can be generated by the display panel. From the current technical level, M is preferably between 2 and 6.
ii. The frame interval time T of the LCD is divided into M sub-intervals. The interval time of each auxiliary interval is

I.e.

It is.
iii. In the time of the simultaneous control signal, first gate lines in the first, second,..., and M sections are activated in turn, and then in the time of the next simultaneous control signal, the first section in turn. , The second gate line in the second ward... And the Mth ward is activated, and this step is repeated. The K set gate line provides a data voltage of video data, and the J set gate line provides a voltage for displaying a black screen. K and J are positive integers and K + J = M. The quantities of J and K are related to the response characteristics of the LCD, and are determined based on the response curves measured and observed in advance. Among them, the frame image of the scanning completed in the i- _{th section is} a time phase difference of the distance t _{i from} the previous section (i-1th section) frame image.
iv. The above steps are repeated until the entire frame interval time T is completed, thereby completing the scanning of the frame image.
Through the above steps, through the division of time (frame interval time) and space (gate line), as well as providing the data voltage and black screen voltage respectively, the LCD achieves the purpose of fast grayscale conversion and its video grayscale Can increase the reaction speed of
The gate line area space of the display panel is divided into a plurality of areas, and the frame interval time is divided into a plurality of auxiliary intervals corresponding to the plurality of areas, and each area is scanned sequentially in the simultaneous control signal time. This is a rapid gray scale conversion method for LCD, characterized by creating a "frame in frame" situation both in time and space.

As described above, the present invention can achieve the object of improving the afterimage phenomenon of the display by causing the LCD to perform a rapid gray scale conversion by the “frame in frame” technique. Furthermore, in addition to dividing the display panel scanning area, the ratio of each scanning area can be adjusted and fixed in accordance with the characteristics of the panel, and can be applied to various display panels.

As shown in FIG. 5, since the panel characteristics of each LCD are different, when applying this method, it is necessary to first analyze the characteristics of the display panel. The method is to set the time t ₀ until the scheduled brightness is reached, take the grayscale value code 120 as an example, and when the voltage V ₅ causes the display panel to reach the brightness that code 120 wants to display within the time t ₀ Assume. The brightness change curve is indicated by 25 in FIG. That is, this voltage is recorded, and then the LCD panel is driven by different voltages V ₁ , V ₂ , V ₃ , and V _{4 so} that the panel reaches a predetermined brightness. The continuous change curves with respect to time of each image brightness are shown in 21, 22, 23, 24. Finally, the voltage corresponding to different brightness changes that can be displayed on the display panel is completed, and this curve change data and the corresponding voltage are compared. (Lookup table) is used as the basis for setting the panel lightness drive. In each embodiment, the lightness voltage to be displayed in the comparison table is adopted and driven. If the liquid crystal characteristics are limited, it can be reinforced with other LCD parts such as a display backlight module.
Separately, the display grayscale value 0 is a completely black, lightness black screen, but in the definition of the present invention, the grayscale value for displaying a black screen on the LCD is below a certain numerical value such as code 5-10. Consider a black screen. In the following description, code 0 is a black screen or a voltage that darkens the screen.

First embodiment In order to clearly express the features of the technology of the present invention, an embodiment will be described in which an LCD gate line is first divided into two sections and two scanning signals are transmitted simultaneously.
FIG. 6 shows the output drive voltage waveform and brightness change curves (a) and (b) of the pixel at the gate line position on the display panel. The horizontal axis indicates time, and the unit is ms. The frame interval time is T, and is divided into two auxiliary intervals t ₁ and t ₂ , and t ₁ : t ₂ = 1: 1. Next, as shown in FIG. 7, the gate line is set to be divided into two sections M ₁ and M ₂ on the display panel 40, the number of gate lines in the first section is m, and the number of gate lines in the second section. Is also m. Since the total number of gate lines is 2 m, the ratio of the number of gate lines in these two sections is 1: 1.
If the brightness required for the data that enters the frame interval (Frame N) from the previous frame interval (Frame N-1) is code120, the brightness is from the reference table (LUT). The display panel 40 is driven by a certain data voltage to be selected. As a result, the display panel 40 achieves lightness within a specific time, and the method of implementing the rapid gray scale conversion of the present invention is as follows.
In the first auxiliary within the interval t _1, the gate controller 41 simultaneously second gate line starts on the display panel 40, provides a data voltage code 120 of frame interval N at the first gate lines G ₁ of the first district M ₁ . It provides voltage code 0 for displaying the black screen to the previous frame interval N-1 in the first gate line G _{m + 1} of the second district M _2, followed by start the next gate line of each group simultaneously, before Provides the same voltage value as the gate line. That is, the same voltage value is provided to the gate lines in the same section until the scanning of each section is completed. A brightness change curve in which the data voltage code 120 is generated is shown in FIG.
When entering at the second auxiliary interval t _2, as shown in FIG. 8, the gate controller 41 activates the second gate line on the display panel 40 at the same time. In addition, a voltage code 0 for displaying a black screen on the first gate line G ₁ in the first section M ₁ is provided. Providing data voltages code 120 of the original frame in the first gate line G _{m + 1} of the second district M _2. Subsequently, the next gate line of each section is activated at the same time, and the same voltage value as that of the previous gate line is provided until the scanning of each section is completed. A brightness change curve in which the data voltage code 0 is generated is shown in FIG.
Here, the situation where the first section M ₁ and the second section M ₂ of the present embodiment space complete the image scanning will be described below. As for the first district gate lines M _1, when it is t ₁ hour, receives the driving of the original frame interval N data voltages code 120, to achieve a brightness that requires, when it is t ₂ hours, black screen The brightness disappears when driven by the voltage code 0 for displaying.
Next, As for the gate line of the second district M _2, when it is t ₁ hour, receives the driving voltage code 0 which displays a black screen, the screen becomes dark, the final part of the previous frame interval N-1 Displays a black screen of the auxiliary interval time. When it is t ₂ hours, the data voltage code 120 of the frame interval N is driven, and the lightness to be displayed by the data of the original frame interval N first auxiliary interval time is displayed. In this way, the present invention simultaneously divides the display screen space, divides the frame interval time, and simultaneously controls the signal, so that the screen of each section becomes dark immediately after displaying the brightness to be displayed, and the fast gray scale Achieve the purpose of conversion.
There is a certain time difference between the simultaneous signals of the above embodiments that activate the two gate lines and display the two gate lines, but at the time of implementation, it is also possible to activate the driving of a plurality of gate lines in each scanning area at the same time. . As shown in FIG. 9, the first auxiliary interval t _1, the gate controller 41 to start the second gate line on the display panel 40 in the same scanning wards simultaneously. That is, at the same time providing data voltages code 120 of frame interval N at the first gate line G ₁ and the second gate line G ₂ in the first district M _1. In addition, after a certain time difference, the first gate line G _{m + 1} and the second gate line G _{m + 2} of the second section M ₂ simultaneously provide a voltage code 0 that displays a black screen, and then at the same time the next gate of each section Activate two gate lines. In addition, the same voltage value is provided on the gate lines of the same section until the scanning of each section is completed. The same is true after entering the next auxiliary interval time, and thus the purpose of rapid gray scale conversion can be achieved.
As described above, the ratio of the number of gate lines and the total number of gate lines in each section determines the time between t ₁ and t ₂ . If the reaction speed of the liquid crystal molecules is fast, this ratio decreases, and if it is the opposite, this ratio increases. This time can be adjusted and fixed by extending the time for the liquid crystal molecules to reach the desired brightness. Determined by display panel characteristics.

Second embodiment The second embodiment will be described on the assumption that the gate line is divided into three sections and simultaneously three scanning signals are controlled. FIG. 10 shows an output drive voltage waveform and brightness change curves (a) and (b) of the pixel at the gate line position on the display panel 50. The horizontal axis indicates time, the unit is ms, the frame interval time is T, and the two auxiliary intervals t ₁ , t ₂ , t ₃ , t ₁ : t ₂ : t ₃ = 1: 1: 1. Further, as shown in FIG. 11, on the display panel 50, the gate lines are set to the three sections M ₁ , M ₂ and M ₃ . If the number of gate lines in the first ward is m, the number of gate lines in the second ward is m, the number of gate lines in the third ward is m, and the total number of gate lines is 3 m, the ratio of the number of gate lines in the second ward is 1 : 1: 1.
As shown in FIG. 10, if the brightness required for data that enters a frame interval (Frame N) from a previous frame interval (Frame N-1) for a certain continuous video data is code120, the brightness is The display panel 50 is driven by a certain data voltage selected from the control table (LUT). As a result, the display panel 50 achieves lightness within a specific time, and the method of implementing the rapid gray scale conversion of the present invention is as follows.
In the first auxiliary interval t ₁ , the gate controller 51 simultaneously activates three gate lines G ₁ , G _{m + 1} , G _{2m + 1} on the display panel 50, and the first gate line G in the first section M ₁ is activated. ₁ provides a data voltage code 120 of frame interval N. Provide voltage code 0 for displaying the black screen of the last stage auxiliary interval time of the previous frame interval N-1 in the first gate lines G _{m + 1} and G _{2m + 1} of the other two sections M ₂ and M ₃ , Subsequently, the next gate line of each section is activated at the same time, and the same voltage value as that of the previous gate line is provided. That is, the same voltage value is provided to the gate lines in the same section until the scanning of each section is completed. A brightness change curve in which the data voltage code 120 is generated is shown in FIG.
When entering at the second auxiliary interval t _2, as shown in FIG. 12, a gate controller 51 activates three gate lines on the display panel 50 at the same time. In addition, the first section M ₁ and the third section M ₃ provide a voltage code 0 for displaying the black screen of the previous frame interval N-1 last stage auxiliary interval time, and the second section M ₂ is the data of the frame interval N. Provides voltage code 120. At the same time, the gate lines of each section are activated within the control signal time until scanning of each section is completed.
When entering the third auxiliary interval t ₃ o'clock, the gate lines of the first section M ₁ and the second section M ₂ provide a voltage code 0 that displays a black screen of the previous frame interval N-1 last stage auxiliary interval time, gate line of the third district M ₃ are to provide data voltages code 120 of frame interval N to complete the scan of each plot. The brightness change curves at the auxiliary intervals t ₂ and t ₃ are shown in FIG.
Here, the situation where the first section M ₁ , M ₂ and M ₃ of the present embodiment space completes the image scanning will be described below. As for the first district gate lines M _1, when it is t ₁ hour, subjected to the original driving data voltages code 120 of frame interval N, when in t ₂ and t ₃ the auxiliary interval time, displays a black screen Provide voltage code 0.
As for the gate line of the second district M _2, when it is t ₁ auxiliary interval time, to provide a voltage code 0 for displaying the black screen of the previous frame interval N-1 of the final stage auxiliary interval time, t ₂ hours Is, the data voltage code 120 of the frame interval N is provided. When it is ₃ hours, it provides a black screen voltage code 0. The video scan that completes the first section M ₁ shows a certain time difference t ₂ .
Further, As for the third district gate lines of M _3, when it is t _1, t ₂ of the auxiliary interval time, to provide a voltage code 0 black screen before frame interval N-1 final stage auxiliary interval time, When t is ₃ hours, the data voltage code 120 of the frame interval N is provided. Image scanning and the second district M ₂ which it completed indicates time difference t _3.

で、各区が含むゲート線の数（m_i）と総ゲート線数（Q）間の比率は

である。よって

で、該比率p_iはLCDの特性に基づき設定し、固定値、或いは調整可能に設定することができる。該Mは2の整数以上で、ディスプレーパネルが生じることができる同時制御信号の最大値以下である。
b. M区ゲート線に対応し、LCDのフレーム間隔時間TはM個補助間隔に区分される。各補助間隔の間隔時間はそれぞれ

、すなわち

である。
c. 同時制御信号の時間内において、順番に第一区、第二区…及び第M区の第一ゲート線を起動し、続いて次の同時制御信号の時間内において、順番に第一区、第二区…及び第M区の第二ゲート線を起動する。このステップを繰り返す。K組ゲート線は映像データのデータ電圧を提供し、J組ゲート線は黒色画面を表示する電圧を提供する。K,Jは正の整数でしかもK+J=Mである。
JとKの数量はLCDの反応特性と関連があり、予め測量、観察したその反応曲線に基づき決定する。もし、第二実施例によるなら、該実施例中のKは1，Jは2である。
d.フレーム間隔時間T全体が終了し、次のフレーム間隔に入るまで上記ステップを繰り返す。その内、第i区の走査完成のフレーム映像は前の区(第i-1区)フレーム映像との距離 t_i の時間位相差である。
上述のステップにより、時間（フレーム間隔時間）と空間（ゲート線）の分割を通して、並びにそれぞれデータ電圧と黒色画面の電圧を提供し、さらにLCDは快速グレースケール転換の目的を達成する。現在の技術水準について言えば、Mの望ましい数は2から6の間で、また同時制御信号も各走査区内の複数のゲート線を同時に起動することができる。該ゲート線の数の範囲は2から第一区のゲート線数の間、或いはLCDは同時に全てのゲート線を起動されるか、或いはダブル方式で走査を行うこともできる。本発明の駆動方法は各式LCD、主動アレイ式LCD及びOLEDディスプレーに適用可能である。 As can be inferred from the above two embodiments, the present invention can be applied to the activation of the M gate lines at the same time, and the scanning area division of the LCD can be set to M division to achieve the object of the invention. The method is as follows.
a. Divide the LCD drive gate lines into M sections from top to bottom, and let the total number of gate lines be Q. The first section includes m ₁ gate lines, the second section includes m ₂ lines, and the M section includes _MM gate lines. That is,

The ratio between the number of gate lines (m _i ) and the total number of gate lines (Q) included in each section is

It is. Therefore

Thus, the ratio p _i is set based on the characteristics of the LCD, and can be set to a fixed value or adjustable. The M is an integer greater than or equal to 2 and less than or equal to the maximum value of the simultaneous control signal that the display panel can generate.
b. The LCD frame interval time T is divided into M auxiliary intervals corresponding to the M section gate lines. The interval time of each auxiliary interval is

I.e.

It is.
c. In the time of the simultaneous control signal, first gate lines in the first, second,..., and M sections are activated in turn, and then in the time of the next simultaneous control signal, , The second gate line of the second ward and the Mth ward is activated. Repeat this step. The K set gate line provides a data voltage of video data, and the J set gate line provides a voltage for displaying a black screen. K and J are positive integers and K + J = M.
The quantities of J and K are related to the response characteristics of the LCD, and are determined based on the response curves measured and observed in advance. According to the second embodiment, K in the embodiment is 1 and J is 2.
d. The above steps are repeated until the entire frame interval time T ends and the next frame interval is entered. Among them, the frame image of the scanning completed in the i- _{th section is} a time phase difference of the distance t _{i from} the previous section (i-1th section) frame image.
The above steps provide the data voltage and black screen voltage through time (frame interval time) and space (gate line) division, respectively, and the LCD achieves the purpose of fast grayscale conversion. As for the current state of the art, the desired number of M is between 2 and 6, and the simultaneous control signal can also activate multiple gate lines in each scan zone simultaneously. The number of gate lines ranges from 2 to the number of gate lines in the first section, or the LCD can activate all gate lines at the same time, or can perform scanning in a double manner. The driving method of the present invention is applicable to each type of LCD, main array type LCD, and OLED display.

It is a simple structure instruction diagram of LCD. It is a local expansion instruction | indication figure of FIG. It is a comparison figure of the brightness change curve (a) of LCD, and the brightness change curve (b) of a well-known CRT display. It is an indication figure of LCD pseudo impulse display in a publicly known technique. It is a change curve figure with respect to time of the image brightness under various different drive voltages. FIG. 6 is an indication diagram of a first embodiment of a voltage change and brightness change curve when the present invention divides a gate line into two sections and controls two gate lines simultaneously. FIG. 3 is an instruction diagram of a first embodiment in which the present invention simultaneously controls two gate lines in a display panel during a first time and a second time (within t ₁ time). FIG. 3 is an instruction diagram of the first embodiment in which the present invention simultaneously controls two gate lines in a display panel in the 1 / 2T time (within t ₁ hour) and the 1 / 2T + 1 time (within t ₂ hours). is there. In the present invention the first period and the second time (t ₁ hour), an instruction view of a first embodiment to launch two gate lines in the display panel at the same time in the same scan area. FIG. 6 is an indication diagram of a second embodiment of a voltage change and brightness change curve when the present invention divides a gate line into three sections and simultaneously controls transmission of the three gate lines. In case the present invention is the first period and the second time (t ₁ hour), an instruction view of a second embodiment for controlling the transmission of three gate lines in the display panel at the same time. In the instruction diagram of the second embodiment, the present invention simultaneously controls the three gate lines in the display panel in the 1 / 3T time (t ₁ hour) and the 1 / 3T + 1 time (t ₂ hours). is there.

Explanation of symbols

10 Display Panel 11 Data Controller 111 Data Line 12 Gate Controller 121 Gate Line 13 Pixel Array 21, 22, 23, 24, 25 Different Brightness Change Curves 40, 50 Corresponding to Different Voltages Display Panels 41, 51 Gate Controller

Claims (9)

The method mainly includes the following steps:
a. LCD drive gate lines are divided into M sections from top to bottom, the total number of gate lines is Q, the first section includes m ₁ gates, the second section includes m ₂ ... the M Ward includes gate lines m _M present, i.e.,

The ratio between the number of gate lines (m _i ) and the total number of gate lines (Q) included in each section is

And therefore

so,
b. The LCD frame interval time T is divided into M auxiliary intervals corresponding to the M area gate lines, and the interval time of each auxiliary interval is respectively

I.e.

so,
c. In the time of the simultaneous control signal, first gate lines in the first, second,..., and M sections are activated in turn, and then in the time of the next simultaneous control signal, , Activate the second gate line of the second ward ... and M ward, repeat this step, the K set gate line provides the data voltage of the video data, and the J set gate line provides the voltage to display the black screen K and J are positive integers and K + J = M,
d. The above steps are repeated until the entire frame interval time T ends and the next frame interval is entered. Of these, the frame image of the scan completed in the i-th segment is the same as the previous (i-1) segment frame image. The time phase difference of distance t _i
Through the above-mentioned steps, through the division of time (frame interval time) and space (gate line), as well as providing data voltage and black screen voltage respectively, LCD is characterized by achieving the purpose of fast grayscale conversion LCD rapid gray scale conversion method. The method of claim 1, wherein the ratio p _i is set based on LCD characteristics and can be set to a fixed value or adjustable. 2. The method of claim 1, wherein M is an integer greater than or equal to 2 and less than or equal to a maximum value of simultaneous control signals that can be generated by a display panel. 4. The method of fast gray scale conversion of LCD according to claim 3, wherein M is between 2 and 6. 2. The method for rapid gray scale conversion of an LCD according to claim 1, wherein the quantities of J and K are related to the response characteristics of the LCD, and are determined based on the response curves measured and observed in advance. The method of claim 1, wherein the black screen is a relatively dark screen, and is a voltage that is adjusted according to the brightness of the background to change the screen to black. The method of claim 1, wherein the method is applicable to a main array LCD and an OLED display. The simultaneous control signal can simultaneously activate a plurality of gate line voltages in the same scanning section, and the range of the number of gate lines is between 2 and the number of gate lines in the first section. 1. A method for rapid gray scale conversion of LCD according to 1. 2. The method of claim 1, wherein all the gate lines are activated at the same time, or the LCD can be scanned in a double manner.

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