TWI409775B - Apparatus for response time compensation of color sequential display - Google Patents

Abstract

An apparatus for response time compensation of color sequential display is provided, the apparatus generates filed over driving data with red, green and blue through compare two adjacent fields correspondingly, which can efficiently compensate the response time of color sequential Twisted Nematic liquid crystal display.

Description

Reaction time compensation device for color sequential display

The present invention relates to a reaction time compensating apparatus for a color sequential display, and more particularly to a reaction time compensating apparatus capable of reducing a frame memory.

With the evolution of optoelectronics and semiconductor technology, the flat panel display has been booming. Among many flat panel displays, liquid crystal display (LCD) has high space utilization efficiency and low power consumption. Superior characteristics such as no radiation and low electromagnetic interference have become the mainstream of the market.

The liquid crystal display generally includes a liquid crystal display panel and a backlight module (Black Light Module, B/L for short), and since the liquid crystal display panel itself does not have self-luminous characteristics, the backlight module must be disposed in the liquid crystal. Below the display panel, the surface light source required for the liquid crystal display panel is provided, so that the liquid crystal display can display the image for the user to watch.

According to the color display of the liquid crystal display, the color mixing method is roughly divided into two types: temporal color mixing and spatial color mixing. At present, the most common displays are spatial juxtaposition and additive color mixing. Taking a Thin-Film Transistor Liquid Crystal Display (TFT-LCD) as an example, each display pixel is composed of three sub-pixels of red, green and blue (RGB) color filters. (Color Filter), in general, the size of the sub-pixel is much smaller than the range that the human eye can distinguish, in human visual perception. The color mixing effect can be achieved in the middle.

If the spatial color mixing of TFT-LCD is replaced by temporal color mixing, it is not necessary to use color filters to form a color mixing effect, and the backlights of different colors can be directly matched with the relative data display, that is, a temporal color mixing effect can be achieved, that is, Can increase module transmittance and save overall module manufacturing costs.

FIG. 1 is a schematic diagram of a Field Sequential Display (FSD) driving circuit architecture according to the prior art. Please refer to FIG. 1 . A Field Sequential Display Controller (FSD Controller) 103 is used to convert the spatial parallel RGB video data (Video Data) of the Video Source 101 system into a time series R→G→ B video data output, the controller simultaneously controls the backlight module to match the displayed different primary color data to generate a corresponding light source. In order to avoid RGB in the writing cycle, the data is mixed and caused to mix color, the backlight source data scanning needs to be switched, the driving waveform is shown in Figure 2, Figure 2 is the traditional field sequential display driving waveform .

When the data is written, the backlight is turned off, and the backlight is turned on after the data is written. This can achieve RGB temporal color mixing and avoid false color mixing. The color image is divided into three primary colors R, G, and B by the color sequential method. Therefore, if the three primary colors R, G, and B images are sequentially displayed in a frame time, the image frequency needs to reach 180 Hz, and the liquid crystal reaction The time must be at least 5.56ms to avoid false color mixing.

FIG. 3 is a conventional FSD transmission brightness response diagram of a twisted nematic (TN) type liquid crystal according to the prior art, please refer to FIG. 3. Since the liquid crystal response time of the color sequential method is shortened, the order of addressing data is more sensitive than the conventional liquid crystal display. It can be seen from FIG. 3 that the first written data (the first few scanning lines) to the backlight module 105 has a relatively long time to open, that is, the liquid crystal can react for a long time, and the backlight module 105 is worn when the light source is turned on. The brightness response can reach the set value; and the last written data (the latter scan lines) to the backlight module 105 is turned on for a relatively short time, so that the liquid crystal penetration brightness response does not have enough time to reach the set value, so The hue of the entire frame will result in uneven upper and lower areas. In the conventional art, for example, Japanese Patent Laid-Open No. 2001-318363, the patent relating to the color sequential method does not have a countermeasure against this problem.

FIG. 4 is a schematic diagram of a high speed liquid crystal voltage reaction of an optically compensated bend alignment (hereinafter referred to as OCB) according to the prior art. Please refer to Figure 4, in order to solve the shortcomings of the TN type used in the color sequential method, most of the current color sequential methods use OCB high-speed liquid crystal, and the reaction time can reach 2ms. However, OCB high-speed liquid crystals can be divided into two modes depending on the voltage: Splay mode and Bend mode. When the driving voltage of the liquid crystal is less than a threshold voltage, the OCB high-speed liquid crystal is in the splay mode, and the liquid crystal cannot display the gray scale color change. Therefore, the liquid crystal driving voltage must be kept greater than the threshold voltage, so that the OCB high-speed liquid crystal operates in the bending mode to display the gray scale color change. It can be seen that the OCB high-speed liquid crystal itself has limitations of flexing to bending conversion, which makes the circuit design more complicated.

It can be clearly seen from the above that there is a problem of uneven color tone in the upper and lower areas in the prior art, and if it is improved by using OCB high-speed liquid crystal, OCB high speed The limitation of the curvature of the liquid crystal to the bending transition makes the circuit design more complicated, resulting in an increase in hardware cost.

The invention provides a reaction time compensating device for a color sequential display, which balances the unevenness of color in the upper and lower regions, and can reduce the frame memory required for overdriving data calculation. Reduce the cost of hardware design.

In view of the above, the present invention provides a reaction time compensation device for a color sequential display. The reaction time compensating device compares the adjacent two field fields to generate corresponding R, G, and B field overdrive data, and R, G, and B respectively represent red, green, and blue.

The time compensation device includes a first memory bank, a second memory block, and a time compensation unit. The first memory block stores the R, G, and B field data of the (N+1)th frame during the first period. The second memory block stores the R, G, and B field data of the Nth frame during the first period. The time compensation unit is coupled to the first memory block and the second memory block for outputting the R, G, and B field overdrive data corresponding to the (N+1)th frame.

The time compensation unit compares the R field data of the N+1 frame with the B field data of the Nth frame to generate the R field overdrive data corresponding to the N+1 frame. Comparing the G field data of the N+1 frame with the R field data of the N+1 frame, the G field overdrive data corresponding to the N+1 frame is generated. Comparing the B field data of the N+1 frame with the G field data of the N+1 frame, the B field overdrive data corresponding to the N+1 frame is generated.

In an embodiment of the invention, the time compensation device further includes a plurality of The device is configured to receive an image data, and transmit the R, G, and B field data of the N+1 frame to the first memory block during the first period, and set the R, G, and B fields of the Nth frame. The data is transferred to the second memory block. The multiplexer further transfers the R, G, and B field data of the N+2 frame to the second memory block in a second period.

In an embodiment of the invention, the time compensating device further includes a first multiplexer and a second multiplexer. The first multiplexer is coupled between the first memory block, the second memory block, and the time compensation unit. The second multiplexer is coupled between the first memory block and the second memory and time compensation unit.

The first multiplexer sequentially outputs the R, G, and B field data of the N+1 frame according to a control signal, and the second multiplexer sequentially outputs the B field data of the Nth frame according to the control signal. R, G field data of the N+1 frame.

In an embodiment of the invention, the first memory block includes a first storage unit, a second storage unit, and a third storage unit. The first storage unit stores the R field data of the (N+1)th frame. The second storage unit stores the G field data of the (N+1)th frame. The third storage unit stores the B field data of the (N+1)th frame.

In an embodiment of the invention, the second memory block includes a fourth storage unit, a fifth storage unit, and a sixth storage unit. The fourth storage unit is configured to store the R field data of the Nth frame. The fifth storage unit is configured to store the G field data of the Nth frame. The sixth storage unit is configured to store the B field data of the Nth frame.

In an embodiment of the invention, the time compensation unit uses a lookup table to output R, G, and B field overdrive data corresponding to the (N+1)th frame.

In addition, the present invention further provides a reaction time compensating device for a color sequential display for comparing adjacent two field fields to generate corresponding R, G, and B fields. The overdrive data R, G, and B respectively represent red, green, and blue.

The time compensating device includes a first storage unit, a second storage unit, a third storage unit, a temporary storage unit and a time compensation unit. The first storage unit stores the R field data of the (N+1)th frame. The second storage unit stores the G field data of the (N+1)th frame. The third storage unit stores the B field data of the (N+1)th frame. The temporary storage unit stores the B field data of the Nth frame. The time compensation unit is coupled to the first storage unit, the second storage unit, the third storage unit, and the temporary storage unit for performing an overdrive operation of the (N+1)th frame.

The time compensation unit compares the R field data of the N+1 frame with the B field data of the Nth frame to generate the R field overdrive data corresponding to the N+1 frame. Comparing the G field data of the N+1 frame with the R field data of the N+1 frame, the G field overdrive data corresponding to the N+1 frame is generated. Comparing the B field data of the N+1 frame with the G field data of the N+1 frame, the B field overdrive data corresponding to the N+1 frame is generated.

In an embodiment of the invention, the reaction time compensation device further includes a first multiplexer and a second multiplexer. The first multiplexer is coupled between the first storage unit, the second storage unit, the third storage unit, and the time compensation unit. The second multiplexer is coupled between the first storage unit, the second storage unit, the temporary storage unit, and the time compensation unit.

The first multiplexer sequentially outputs the R, G, and B field data of the N+1 frame according to a control signal, and the second multiplexer sequentially according to the control signal. The B field data of the Nth frame and the R and G field data of the N+1 frame are output.

In an embodiment of the invention, the time compensation unit uses a lookup table to output R, G, and B field overdrive data corresponding to the (N+1)th frame.

The invention further provides a reaction time compensating device for a color sequential display, which is used for comparing adjacent two field fields to generate corresponding R, G and B field overdrive data, and R, G and B respectively represent red, green and blue. color.

The time compensation device includes a data temporary storage unit, a first time compensation unit, a second time compensation unit and a third time compensation unit. The data temporary storage unit is configured to store the B field data corresponding to the Nth frame. The first time compensation unit is coupled to the data temporary storage unit for comparing the R field data of the N+1 frame and the B field data of the Nth frame to generate the R field overdrive data corresponding to the N+1 frame. .

The second time compensation unit is configured to compare the G field data of the N+1 frame with the R field data of the N+1 frame to generate G field overdrive data corresponding to the N+1 frame. The third time compensation unit compares the B field data of the N+1 frame with the G field data of the N+1 frame to generate the B field overdrive data corresponding to the N+1 frame.

The R, G, and B field data of the (N+1)th frame are parallelly transmitted to the corresponding first time compensation unit, the second time compensation unit, and the third time compensation unit.

In an embodiment of the invention, the reaction time compensating device further includes a first storage unit, a second storage unit, and a third storage unit. The first storage unit is coupled to the first time compensation unit, and the storage corresponds to the first The R field of the N+1 frame is overdriven. The second storage unit is coupled to the second time compensation unit, which stores the G field domain overdrive data corresponding to the (N+1)th frame. The third storage unit is coupled to the third time compensation unit, and stores the B field domain overdrive data corresponding to the (N+1)th frame.

In an embodiment of the invention, the reaction time compensating device further includes a multiplexer. The multiplexer is coupled to the first storage unit, the second storage unit, and the third storage unit for sequentially outputting R, G, and B field overdrive data corresponding to the (N+1)th frame.

The invention utilizes the comparison between the currently displayed field data and the next field data to generate overdrive data corresponding to the three primary colors of the next frame, and the overdrive data can improve the reaction speed of the conventional TN liquid crystal and eliminate the hue of the upper and lower regions. In addition, the present invention cooperates with different data temporary storage and reading processes to reduce the frame storage memory required for overdrive data calculation, thereby reducing the complexity of the hardware circuit and reducing the design cost thereof. .

In order to make the objects, features and advantages of the present invention more comprehensible, the preferred embodiments are described below,

The technical effect to be achieved by the present invention is mainly to eliminate the problem of uneven color tone in the upper and lower regions and to improve the problem of insufficient liquid crystal reaction time of the color sequential liquid crystal display. In order to make the field of the invention well known to those skilled in the art, only the following embodiments are described in detail.

[First Embodiment]

Figure 5 is a system block diagram of a reaction time compensating apparatus of a color sequential display according to a first embodiment of the present invention. Please refer to Figure 5, reaction time compensation The device 500 includes memory blocks 520, 530, multiplexers 510, 540, 550, and a time compensation unit 560. The multiplexer 510 is coupled to the memory block 520 and the memory block 530. The multiplexer 540 is coupled between the memory blocks 530, 530 and the time compensation unit 560. The multiplexer 550 is also coupled between the memory blocks 520, 530 and the time compensation unit 560.

The multiplexer 510 is configured to receive an image data (including three fields of R, G, and B, and R, G, and B respectively represent red, green, and blue), and transmit the image data according to the frame counting result S _frame. To memory block 520 or 530. The memory block 520 includes storage units 521 to 523, and the memory block 530 includes storage units 531 to 533. The multiplexer 510 can temporarily store the received RGB field data in the storage units 521 to 523 or the storage units 531 to 533, respectively. In this embodiment, the image data is stored in an interlaced manner. When the memory blocks 520 and 530 respectively store the image data of the Nth frame and the N-1 frame, the image data of the N+1 frame is stored in the memory area. Block 530 replaces the original N-1 frame. In the next frame period, the N+2 frame is stored in the memory block 520 to replace the image data of the original N frame, and so on, and N is a positive integer. In other words, the memory blocks 520, 530 store the image data of the adjacent frames to provide the frame data required for the overdrive operation.

The multiplexers 540, 550 read the result S _field according to the field count and read the data required by the time compensating unit 560 from the memory blocks 520, 530 and transfer it to the time compensating unit 560 for overdrive operation. Since the overdrive data needs to compare the image data of the current field and the previous field to generate overdrive data corresponding to the current field. If the fields of each frame are respectively R, G, and B fields, the image data after the overdrive operation is called R, G, and B field overdrive data (by R'/G'/ B' indicates).

Taking the N+1 frame as an example, the multiplexer 510 stores the received R, G, and B field data sequentially in the storage units 521, 522, and 523. At this time, the storage units 531, 532, and 533 The stored image data is the R, G, and B field data of the Nth frame. The multiplexer 540 outputs the R, G, and B field data of the N+1 frame in sequence, and the multiplexer 550 sequentially outputs the B field data of the Nth frame and the R and G of the N+1 frame. Field data.

The time compensation unit 560 generates the R field overdrive data corresponding to the N+1 frame according to the R field data of the N+1 frame and the B field data of the Nth frame; and the G field data according to the N+1 frame and The R field data of the N+1 frame generates the G field overdrive data corresponding to the N+1 frame; and the corresponding N+1 frame is generated according to the B field data of the N+1 frame and the G field data of the N+1 frame. B field domain overdrive data. The overdrive data is mainly to compare the grayscale values of the current field and the previous field, and then check the table to find that the corresponding overdrive data drives the liquid crystal with a higher or lower grayscale voltage, so that the pixels can be faster. Reach the desired grayscale value.

[Second embodiment]

Figure 6 is a system block diagram of a reaction time compensating apparatus of a color sequential display according to a second embodiment of the present invention. Referring to FIG. 6 , the reaction time compensation device 600 includes storage units 601 603 603 , a temporary storage unit 604 , multiplexers 605 606 606 , and a time compensation unit 607 . The multiplexer 605 is coupled between the storage units 601-602 and the time compensation unit 607. The multiplexer 606 is coupled to the storage The units 601 to 603, the temporary storage unit 604 and the time compensation unit 607.

In this embodiment, the image data is stored in a parallel manner, and the R, G, and B field data of the image data respectively correspond to the storage unit 601, the storage unit 602, and the storage unit 603. When the storage unit 603 is ready to receive the B field data of the next frame, the current B field domain data is stored in the temporary storage unit 604. For example, when the storage units 601-603 respectively store the R, G, and B field data corresponding to the (N+1)th frame, the temporary storage unit 604 stores the B field data of the Nth frame. In the next frame period, the image data of the N+2 frame is stored in the storage units 601-603 to replace the image data of the original N+1 frame, and the temporary storage unit 604 stores the B field of the N+1 frame. Data, and so on, N is a positive integer. In other words, the storage units 601-603 store the R, G, and B field data of the next frame and the temporary storage unit 604 stores the B field data of the current frame to provide the frame data required for the overdrive operation.

The multiplexers 605 and 606 read the data required by the time compensation unit 607 from the storage units 601 to 603 and the temporary storage unit 604 according to the field count result S _field , and transmit the data to the time compensation unit 607 for overdriving. Operation. Since the overdrive data needs to compare the image data of the current field and the previous field to generate overdrive data corresponding to the current field. If the fields of each frame are respectively R, G, and B fields, the image data after the overdrive operation is called R, G, and B field overdrive data (by R'/G'/ B' indicates).

Taking the N+1 frame as an example, the R, G, and B field data of the image data are sequentially stored in the storage unit 601, the storage unit 602, and the storage unit 603. At this time, the image data stored in the temporary storage unit 604 is the first B field data of the N frame. Since the field count result S _field changes according to the timing, the multiplexer 605 outputs the R, G, and B field data of the N+1 frame according to the timing, and the multiplexer 606 outputs the Nth frame according to the timing. The B field data and the R and G field data of the N+1 frame.

The time compensation unit 607 generates the R field overdrive data corresponding to the N+1 frame according to the R field data of the N+1 frame and the B field data of the Nth frame; and the G field data according to the N+1 frame and The R field data of the N+1 frame generates the G field overdrive data corresponding to the N+1 frame; and the corresponding N+1 frame is generated according to the B field data of the N+1 frame and the G field data of the N+1 frame. B field domain overdrive data. The overdrive data is mainly to compare the grayscale values of the current field and the previous field, and then check the table to find that the corresponding overdrive data drives the liquid crystal with a higher or lower grayscale voltage, so that the pixels can be faster. The required grayscale value is achieved, and in this embodiment, the unnecessary frame data can be used to reduce the frame memory used, which reduces the complexity of the hardware circuit and reduces the design cost.

[Third embodiment]

Figure 7 is a system block diagram of a reaction time compensating apparatus of a color sequential display according to a third embodiment of the present invention. Referring to FIG. 7 , the reaction time compensation device 700 includes a temporary storage unit 701 , time compensation units 702 704 704 , storage units 705 707 707 , and a multiplexer 708 . The temporary storage unit 701 is coupled to the time compensation unit 703. The storage unit 705 is coupled to the time compensation unit 702 and the multiplexer 708. The storage unit 706 is coupled to the time compensation unit 703 and the multiplexer 708. The storage unit 707 is coupled to the time compensation unit 704 and the multiplexer 708.

In this embodiment, the R, G, and B field data of the N+1 frame are parallelly transmitted to the corresponding time compensation unit 702, the time compensation unit 702, and the time compensation unit 704. When the N+1 frame is input, the B field of the Nth frame is stored in the data temporary storage unit 701. The time compensation units 702-704 directly perform the overdrive operation according to their corresponding field data. Since the overdrive data needs to compare the image data of the current field and the previous field to generate overdrive data corresponding to the current field. If the fields of each frame are respectively R, G, and B fields, the image data after the overdrive operation is called R, G, and B field overdrive data (by R'/G'/ B' indicates).

Taking the N+1 frame as an example, the compensation unit 702 correspondingly inputs the N+1 frame R field data and the N+1 frame G field data, and generates corresponding G field overdrive data according to the field data thereof, and stores The unit 705 is configured to store the G field overdrive data. The time compensation unit 703 correspondingly inputs the Nth frame B field data and the N+1 frame R field data, and generates corresponding R field overdrive data according to the field data, and the storage unit 706 is used to store the R field. Domain overdrive data. The time compensation unit 704 correspondingly inputs the N+1 frame G field data and the N+1 frame B field data, and generates corresponding B field domain overdrive data according to the field data, and the storage unit 707 is used to store the B field. Domain overdrive data. The multiplexer 708 sequentially outputs the R, G, and B field overdrive data.

In this embodiment, the time compensation units 702-704 are disposed in front of the storage units 705-707 due to the integration of the front-end type. The configuration of the memory not only increases the achievability, but also achieves immediate parallel processing. high efficiency. This embodiment can be used to perform an overdrive operation of pixel by pixel. The temporary storage unit 701 only needs to store the data of one pixel of the previous B field, and can perform overdrive operation. Therefore, the present example can greatly reduce the memory capacity requirement required for the overdrive operation, thereby reducing the frame memory used, reducing the complexity of the hardware circuit, and reducing the design cost.

In summary, the reaction time compensating device of the color sequential display of the present invention generates overdrive data corresponding to the current field through the image data of the current field and the previous field, and improves the response of the color sequential display. time. In addition, by removing unnecessary field data, the frame memory used can be reduced, the complexity of the hardware circuit can be reduced, and the design cost can be reduced.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100‧‧‧Traditional field sequential display driver circuit

101‧‧‧Video source

103‧‧‧ Field sequential display controller

105‧‧‧Backlight module

107‧‧‧ Picture frame storage memory

109‧‧‧ Panel Module

500,600,700‧‧‧Response time compensation

510,540~550,605~606,708‧‧‧Multiplexer

520~530‧‧‧ memory block

521~523,531~533,601~603,705~707‧‧‧ storage unit

560,607,702~703‧‧‧Time compensation unit

604, 701‧‧‧ temporary storage unit

1 is a block diagram of a field sequential display driving circuit according to the prior art.

2 is a waveform diagram of a conventional field sequential display driving.

3 is a conventional FSD transmission luminance response diagram of a twisted nematic liquid crystal according to the prior art.

4 is a schematic diagram of an optically compensated curved alignment high speed liquid crystal voltage reaction according to the prior art.

Figure 5 is a system block diagram of a reaction time compensating apparatus of a color sequential display according to a first embodiment of the present invention.

Figure 6 is a system block diagram of a reaction time compensating apparatus of a color sequential display according to a second embodiment of the present invention.

Figure 7 is a system block diagram of a reaction time compensating apparatus of a color sequential display according to a third embodiment of the present invention.

500‧‧‧Response time compensation device for color sequential display

510,540,550‧‧‧Multiplexer

520~530‧‧‧ memory block

521~523,531~533‧‧‧ storage unit

560‧‧‧Time Compensation Unit

Claims (7)

A reaction time compensating device for a color sequential display for comparing two adjacent fields to generate corresponding R, G, and B field overdrive data, wherein R, G, and B represent red, green, and blue, respectively. The compensation device includes: a first memory block, storing R, G, and B field data of the N+1 frame in a first period; and a second memory block storing the Nth frame in the first period R, G, and B field data; a time compensation unit coupled to the first memory block and the second memory block for outputting R, G, and B fields corresponding to the (N+1)th frame The domain overdrive data, wherein the time compensation unit generates the R field overdrive data corresponding to the N+1 frame according to the R field data of the N+1 frame and the B field data of the Nth frame; The G field data of the N+1 frame and the R field data of the N+1 frame generate the G field overdrive data corresponding to the N+1 frame; the B field according to the N+1 frame The data and the G field data of the N+1 frame generate the B field domain overdrive data corresponding to the N+1 frame, N is a positive integer; a first multiplexer is coupled to the first memory block The second memory Between the block and the time compensating unit; and a second multiplexer coupled between the first memory block, the second memory block and the time compensation unit; wherein the first multiplexer is A control signal sequentially outputs R, G, and B field data of the N+1 frame, and the second multiplexer according to the control signal The number of the B field data of the Nth frame and the R and G field data of the N+1 frame are sequentially output. The time compensation device of claim 1, further comprising: a multiplexer for receiving an image data, and wherein the R, G, and B fields of the (N+1) frame are in the first period. Data is transmitted to the first memory block, and the R, G, and B field data of the Nth frame are transmitted to the second memory block; wherein the multiplexer is further in the second period, the Nth The R, G, and B field data of the +2 frame are transferred to the second memory block. The time compensation device of claim 1, wherein the first memory block comprises: a first storage unit for storing R field data of the N+1 frame; and a second storage unit, The G field data for storing the N+1 frame; and a third storage unit for storing the B field data of the N+1 frame. The time compensation device of claim 1, wherein the second memory block comprises: a fourth storage unit for storing R field data of the Nth frame; and a fifth storage unit for The G field data of the Nth frame is stored; and a sixth storage unit is configured to store the B field data of the Nth frame. For example, the reaction time compensating device described in claim 1 of the patent scope, The time compensation unit further includes a lookup table to output R, G, and B field overdrive data corresponding to the (N+1)th frame. A reaction time compensating device for a color sequential display is configured to compare adjacent two field fields to generate corresponding R, G, and B field overdrive data, and R, G, and B respectively represent red, green, and blue, and the time The compensation device includes: a first storage unit for storing R field data of the N+1 frame; a second storage unit for storing G field data of the N+1 frame; and a third storage a unit for storing the B field data of the N+1 frame; a temporary storage unit for storing the B field data of the Nth frame; a time compensation unit coupled to the first storage unit, the The second storage unit, the third storage unit, and the temporary storage unit are configured to perform an overdrive operation of the (N+1)th frame, wherein the time compensation unit is based on the R field data of the (N+1)th frame and the The B field data of the N frame generates the R field overdrive data corresponding to the N+1 frame; the G field data of the N+1 frame corresponds to the R field data of the N+1 frame. The G field of the N+1 frame is overdriven; the B field corresponding to the N+1 frame is generated according to the B field data of the N+1 frame and the G field data of the N+1 frame. Overdrive data, N being a positive integer; a first multiplexer, coupled to the first storage unit between the second storage unit, a third storage unit and the time compensating means; and a second multiplexer coupled between the first storage unit, the second storage unit, the temporary storage unit, and the time compensation unit; wherein the first multiplexer sequentially outputs the N+ according to a control signal 1 R, G, B field data of the frame, the second multiplexer sequentially outputs the B field data of the Nth frame and the R and G field data of the N+1 frame according to the control signal. The response time compensating device according to claim 6, wherein the time compensating unit further comprises a lookup table to output R, G, B field overdrive data corresponding to the (N+1)th frame.