TW201222505A - Compensation display device, compensation method and circuit - Google Patents

Abstract

A compensation display device is suitable for receiving a video signal. The video signal comprises a current frame displaying at the time of display and a prior frame displaying before the time of display. Each frame has a plurality of pixels located respectively in different coordinates, and each pixel has a plurality of color components. The compensating display device includes a compensation circuit and a display module. The compensation circuit receives the video signal and, based on the same coordinate, the residual values at the time of display resulting from the color components of the current frame and the color components of the prior frame are subjected to a subtraction operation to get the compensation value of the color components of the current frame. The display module is electrically connected to the compensation circuit to receive the color components' compensation value of the current frame and, based on the color components' compensation value, displays a compensation picture related to the current frame.

Description

201222505 VI. Description of the Invention: [Technical Field] The present invention relates to an apparatus, method and circuit, and more particularly to a compensation display apparatus, a compensation method and a circuit. [Prior Art] A Field Sequential Color LCD (FCC-LCD) is a liquid crystal display device that does not require a color filter, and sequentially displays red, green, and blue color components. In the face, the human eye vision temporarily stays on the retina to present a full-color image through time-mixing, but the shortcoming of the field-color-sequential liquid crystal display device is: a serious color separation (Color Breakup, CBU) The phenomenon of color separation is caused by a relative speed between the human eye and the image. The three color components cannot overlap in the retina. There is a phenomenon of color misalignment at the edge, and the visual persistence integral is generated. This color separation phenomenon reduces the image quality of the field color sequential liquid crystal display device. A color sequential display system that solves the above problem is disclosed in US Pat. No. 7,057,668 B2. The color sequential display system includes a liquid crystal display that can be signal-written, and the liquid crystal display is controlled to be sequentially presented at a high display frequency. In the three-color sub-pictures of red, blue and green, a monochrome sub-surface with a lower display frequency is interspersed to reduce the perception of color misalignment by the human eye to reduce the color separation phenomenon, and the color sequence display system is detailed. The description can be found in U.S. Patent No. 7,057,668 B2, and therefore will not be described. However, the color sequence display system has the following disadvantages: L must switch to the high and low display frequencies to distinguish the monochrome sub-picture from the display frequency of the three color component sub-pictures of 201222505, resulting in liquid crystal reaction speed and signal writing. Entry time is limited. 2. An additional backlight switching circuit is needed to switch the monochrome backlight and the red, blue and green backlights, resulting in a more complex overall structure and increased hardware cost. SUMMARY OF THE INVENTION Accordingly, it is a first object of the present invention to provide a compensation display device that compensates for visually retaining residual energy to solve color separation phenomena and reduce hardware cost. The compensation display device is adapted to receive a video signal, where the video signal includes a current frame displayed at a display time point and a previous frame displayed before the display time point, and each frame has multiple The pixel is located at different coordinates, each pixel has a plurality of color components, and the compensation display device comprises: a compensation circuit 'receiving the video signal, and according to the same coordinate, the color component of the current frame and the previous message And the display module is electrically connected to the compensation circuit to receive the current message The color component compensation value of the frame is based on the color component compensation value to display a compensation plane associated with the current frame. A second object of the invention is to provide a compensation method. The compensation method is applied to a compensation display device. The compensation display device includes a compensation circuit for receiving a video signal and a display module electrically connected to the compensation circuit. The video signal includes a display time point display 201222505 2 The current frame and a previous frame displayed before the display time point, each frame has a plurality of pixels respectively located at different coordinates, each pixel has a plurality of color components, and the compensation method comprises the following steps: A) receiving the video signal by using the compensation circuit, and performing subtraction according to the residual value of the color component of the current frame and the color component of the previous frame at the display time point on the same coordinate to obtain the The compensation value of the color components of the current frame; and

(B) receiving, by the display module, the color component compensation value of the current frame, and displaying the compensation component related to the current frame according to the color component compensation value. The second purpose of the invention is to provide a compensation circuit. The human λ compensation circuit is adapted to receive a video signal, and the video signal packet ▲ is displayed in the current frame of one or four time points and a first frame at the time of the display time. The frame has a plurality of different pixels: each pixel has a plurality of color components, and the compensation circuit package

For storing the previous frame and the current frame; and: electrically connecting to the memory 'and reading the color component of the second mother_pixel from the memory, and the previous frame is Working in the corresponding visual persistence coefficient to obtain the residual value respectively; "the mother-pixel of the color component at the display time point of the same == the memory reads the current frame every - the pixel 〇 XW 刀 knife does not use the color component of each pixel of the current frame 201222505, the color component is salted to the same seat; ^ corresponds to the color component residual value of each pixel of the previous frame To obtain the compensation value of the equal amount of each pixel of the current frame. A fourth object of the present invention is to provide a compensation method. The compensation method is applied to a compensation circuit, and the compensation circuit receives a video signal, and the video signal includes a frame for displaying a time frame and a previous frame displayed before the display time point, and each of the frames. The frame has a plurality of pixels respectively located at different coordinates, each pixel has a plurality of color components, and the compensation circuit comprises a memory and a processor electrically connected to the scribe, and the compensation method comprises the following steps: (A) utilizing the delta memory to store the previous frame and the current frame; (Β) using the processor to read the color component of each pixel of the previous frame from the memory and The color components of the previous frame are respectively multiplied by the corresponding visual persistence coefficients to obtain a residual value of the color knives of each pixel of the previous frame at the display time point; C) using the processor to read the color components of each image of the current frame from the memory, and subtracting the corresponding color on each of the color components of each pixel of the current frame The color of each pixel of the previous frame A residual value, to obtain the current component of each pixel of the color information of such frame of the compensation value. [Embodiment] The above and other technical contents, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. 201222505 <Compensation display device>

As shown in FIG. 1, a preferred embodiment of the compensation display device 4 of the present invention is adapted to be electrically connected to a video source 5 (such as a DVD player) for receiving a decompressed video signal, the video signal comprising - Display time point _ display current frame and at least one previous frame displayed before the display time point, and each frame has multiple pixels located at different coordinates (four) each pixel has multiple color components (in In this embodiment, the color components are first to third color components of red, green, and blue RGB, respectively, but are not limited thereto, and the color components may also represent luminance H, saturation s, brightness, or Is the brightness Y, M Cb, red Cr, or other applicable color:: expression and the following is convenient for the sun and the moon, only use a previous frame coffee training and a current frame f (nxt) to explain, and The compensation display device 4 includes a compensation circuit 7 and a display module 6. The compensation circuit 7 has a processor η electrically connected to the video source 5, and a memory 72 electrically connected to the processor 71.

The display module 6 is electrically connected to the compensation circuit 7, and includes a panel control circuit 6 electrically connected to the processor 71 and a liquid crystal display panel 62 electrically connected to the panel control circuit 61. As shown in FIG. 2, the compensation display device 4 performs a compensation method, and the compensation method includes the following steps: Step 2: The compensation circuit 7 receives the video signal, and according to the same-coordinate pixel, 'belongs to the current frame The color component and the residual color* of the color component belonging to the previous frame at the display time point are subtracted to obtain a compensation value of the color component of the current frame, and the step 2 includes the following substeps of 201222505 Sub-step 21: The processor 71 receives the video signal, and stores the previous frame f((nl)xt) and the current frame f(nxt) in the memory 72. Sub-step 22: The processor 71 reads the equal-color component p(tx(nl), x, y) of each pixel of the previous frame f((nl)xt) from the memory 72, and the previous frame The color components of f(nxt) are respectively multiplied by the corresponding visual persistence coefficients δ1 to obtain the color components of each pixel of the previous frame f((nl)xt) at the display time point txn, respectively. a residual value (5. The visual persistence coefficient can be dynamically adjusted in this embodiment, and is related to a residual energy value, and the residual energy value of the color component is attenuated according to the respective quadratic curve with time. The general formula of the equation of each quadratic curve is as follows: y=at2+bt+c where ' y is the residual energy value' t is time, and the values of coefficients a, b, c are the color components The panel process parameters and the degree of human perception are determined. In other words, as shown in FIG. 3, the residual energy values of different color components are different with time, so that the respective quadratic curves corresponding to the color components are Different, and the visual persistence coefficients corresponding to different color components are different, for example, the first color component R The equation of the term curve is y=aixt2+b〗Xt+Cl 'The equation of the binomial curve of the second color component G is y=a2Xt2+b2Xt+C2, and the equation of the binomial curve of the third color component B is y=a3Xt2+b3Xt+C3, where ' ai^a2#a3, bi^b2^b3, Cl q 笑 201222505 Sub-step 23: The processor 71 further treats each of the previous frames f((nl)xt) The residual value of the color component of the pixel <5 lxP(tx(nl), x, y) is stored in the memory 72. Sub-step 24: The processor 71 reads the current frame from the memory 72. The color component of each pixel is a residual value of the color component of the mother pixel of the previous frame f((nl)xt) 6 ixp(tx(n_i), x, y)

Sub-step 25. The processor 71 subtracts each pixel of the previous frame f((n_ i ) χ t) corresponding to the same coordinate with the color component of each pixel of the current frame f(nxt) The color component residual value is obtained to obtain the color component compensation value Er of each pixel of the current frame, as in the formula (1):

Er=P(txn,x,y)— <5 lxP(tx(nl),x,y) where (1) where the parameter P(nxt,x,y) is the current frame at coordinates (x,y) One of the color component 'parameters' of the pixel is a corresponding color component of the pixel of the coordinate (X, y) of the previous frame of the current frame. Equation (1) is simplified from equation (2), and equation (2) is as follows: Er = P(txn, x, y) - 5 1 xP(tx(nl), x, y) - d 2xP (tx(n-2),x,y) -···.- δ mxP(tx(nm),x,y) Equation (2) Parameter P(tx(n-2),x,y)~P (tx(n_m), xy) is a corresponding color component of the first two to m previous frames of the current frame at coordinates (x, y), and the visual persistence coefficient <5 2~(5 m is extremely small as 〇. In this example, as shown in Fig. 4, 'assuming the previous frame f((n_1)xt) is at coordinate α, the energy values of the three color points # RGB of the pixel of υ are at the time point ( Bujia time, respectively (60, 50, 40), and the three color components in the 201222505 show time point txn corresponding to the visual persistence coefficient d 1 are (〇5, 〇4, 0.3), respectively, via the processor 71 multiplication (6〇χ〇5, 50χ〇4, 4〇χ0.3) can get the residual value of color components (3〇, 20, 12). Now the frame f(nxt) is at coordinates (l, i) The energy values of the three color components RGB of the pixels are (5 〇, 50, 50) at the display time point txn, respectively, and the processor 71 performs subtraction (5 〇 -3 〇, 50-20, 50-12) ) can get this The color component compensation value (20, 30, 38). Step 3: The display module 6 receives the color component compensation value of the current frame and adds a value according to the color component to display a current frame. Lu's compensation screen, and step 3 includes the following sub-steps: Sub-step 31: The panel control circuit 61 receives the compensation value of the color component of each pixel of the current frame, and outputs a correlation component related to the color component. The driving signal of the compensation value is sub-step 32: the liquid crystal display panel 62 receives the driving signal, and displays the compensation surface according to the driving signal to compensate for the visual persistence formed by the residual energy of the previous frame. The above embodiment has the following advantages: Lu 1. Solving the problem of color separation by compensating for the visual persistence formed by the residual energy of the previous frame. 2. It is not necessary to switch to high and low display frequencies to avoid liquid crystal. The reaction speed and the writing time of the 彳§ wave are limited. 3. The backlight switching circuit is not required to be added, which can reduce the hardware cost. 4. The correction screen is corrected by the visual persistence coefficient that can be adjusted. In order to meet the different levels of human perception. 10 201222505 The above is only the preferred embodiment of the present invention, and is not limited to the scope of the present invention. The simple equivalent changes and modifications made by the scope and the description of the invention are still within the scope of the present invention. [Fig. 1] A block diagram of a preferred embodiment of the compensation display device of the present invention; 2 is a flow chart of a compensation method performed by the preferred embodiment; FIG. 3 is a graph showing the attenuation of the residual energy value of the color component over time; and FIG. 4 is a schematic diagram of the previous frame and the current frame.

11 201222505 [Explanation of main component symbols] 2~3 ··.. Compensating step 61 •... ••...panel control circuit 21-25·...operation step 62...... liquid crystal display panel 31 -32· ...display step 7... ••...compensation circuit 4............compensation display device 71 ·.··.....processor 5 ....... ... see sfl source 72 ···.. -----ό忆忆体6............Display module

12

Claims (1)

201222505 VII. Patent application scope: 1. A compensation display device for receiving a video signal, the video signal includes a current frame displayed at a display time point and a previous display displayed before the time point; a frame, and each frame has a plurality of pixels respectively located at different coordinates, each pixel has a plurality of color components, and the compensation display device comprises: a compensation circuit that receives the video signal ^ and is based on the same coordinate And the residual value of the color component of the current frame and the color component of the previous frame at the display time point is subtracted to obtain a compensation value of the color component of the current frame; and - display The module is electrically connected to the compensation circuit to receive the color component compensation value of the current frame, and is based on the color component compensation value to display a compensation picture related to the current frame. According to the scope of the patent application, the display module includes: a compensation display device according to the first aspect, wherein the circuit is electrically connected to the compensation circuit to receive the color component of each pixel of the current frame. Compensating a value, and outputting a driving signal related to the compensation value of the color component; and the driving: displaying a panel electrically connected to the panel control circuit to receive °" a ' and displaying the driving signal according to the driving signal Compensation screen. 3. According to the patent application scope flute, the compensation display device according to the first item, wherein the compensation circuit comprises: a memory-processor for storing the previous frame and the current frame; and electrically connected to The memory 'and reads from the memory 13 201222505 the color components of each pixel of the previous frame, and multiplies the color components of the previous frame by corresponding visual persistence coefficients, respectively And respectively obtaining a residual value of the color component of each pixel of the previous frame at the display time point; the processor further reading the color component of each pixel of the current frame from the memory, and And subtracting the residual value of the color component of each pixel of the previous frame corresponding to the same coordinate on the color component of each pixel of the current frame to obtain each pixel of the current frame. The compensation value of the color component. 4. The compensation display device according to claim 3, wherein the processor further receives the video frame number, and stores the previous frame and the current frame in the memory, and the processor The residual value of the color component of each pixel of the previous frame is further stored in the memory. 5. A compensation method for a compensation display device, the compensation display device comprising a compensation circuit for receiving a video signal and a display module electrically connected to the compensation circuit, the video signal comprising a display time point The current frame displayed and a previous frame displayed before the display time point 'each frame has a plurality of pixels respectively located at different coordinates, each pixel has a plurality of color components' and the compensation method comprises the following steps: (Α) receiving the video signal by using the compensation circuit, and performing subtraction on the same coordinate, the color component of the current frame and the residual value of the color component of the previous frame at the display time point to obtain The compensation value of the color component of the current frame; and (Β) receiving, by the display module, the color component of the current frame to compensate for the 201222505 compensation value, and displaying a correlation according to the color component compensation value The compensation screen for the current frame. According to the compensation method described in claim 5, the display module includes a panel control circuit electrically connected to the compensation circuit and a liquid crystal display panel electrically connected to the panel control circuit, wherein the step includes The following sub-steps: (B1) using the panel control circuit to receive the compensation value of the color component of each pixel of the current frame and outputting a driving signal related to the compensation value of the color component, and (B2) Receiving the driving signal by the liquid crystal display panel, and displaying the compensation screen according to the driving signal. 7. The compensation method according to claim 5, wherein the compensation circuit comprises a memory and a processor electrically connected to the memory, wherein the step (A) comprises the following sub-steps: (A1) utilizing The memory stores the previous frame and the current frame; (A2) reading, by the processor, the color components of each pixel of the previous frame from the memory, and using the previous frame The color components are respectively multiplied by corresponding visual persistence coefficients to respectively obtain residual values of the color components of each pixel of the previous frame at the display time point. And, (3) using the processor from the The memory reads the color component ' of each pixel of the current frame and subtracts each of the previous frames corresponding to the same coordinate from each of the color components of each pixel of the current frame - The residual value of the color component of the pixel is obtained to obtain the compensation value of the color component of each of the current frame of 15 201222505 pixels. According to the method of (4) described in the scope of the patent application, (4) (Α) also includes the following substeps: (Α4) 利The processor receives the video signal, and stores the previous frame and the current frame in the memory; and (Α5) uses the processor to divide the color of each pixel of the previous frame by $ The value is stored in this memory. 9. A compensation circuit suitable for receiving a video signal, wherein the video signal packet S displays a current frame displayed at a time point of time and a previous frame displayed before the display time point, and each frame has a plurality of frames. Each pixel having a different coordinate has a plurality of color components, and the compensation circuit includes: a hidden body for storing the previous frame and the current frame; and a processor 'electrically connected to the Memory, and reading the color components 4 of each pixel of the frame from the memory, and multiplying the color components of the previous frame by corresponding visual persistence coefficients, respectively, to be respectively paid The color component of each of the previous frames is a residual value at the display time point; the processor further reads the color components of each pixel of the current frame from the memory, and respectively Subtracting the color component residual value ' of each pixel of the previous frame corresponding to the same coordinate on the color component of each pixel of the current frame to obtain the pixel of each pixel of the current frame The compensation value of the equal color component. 10. According to the compensation circuit described in item 9 of (4), the device 16 201222505 further receives the video signal, and stores the previous frame and the current armature in the memory, and The processor further stores the residual value of the color component of each pixel of the previous frame to the memory. 11. A compensation method applied to a compensation circuit, the compensation circuit receiving a video signal, the video signal including a current frame displayed at a display time point and a previous frame displayed before the display time point. Each frame has a plurality of pixels respectively located at different coordinates, each pixel has a plurality of color components, and the compensation circuit comprises a memory and a processor electrically connected to the memory, and the compensation method comprises the following Step: (A) using the memory to store the previous frame and the current frame; (B) using the processor to read the color component of each pixel of the previous frame from the memory, and The color components of the previous frame are respectively multiplied by the corresponding visual persistence coefficients to respectively obtain a residual value of the color component of each pixel of the previous frame at the display time point; and (C) Using the processor, the color components of each pixel of the current frame are read from the memory, and the previous frames corresponding to the same coordinate are respectively subtracted from the color components of each pixel of the current frame. It Such residual color component values of a pixel to obtain the color component of the current compensation for any such information for each pixel value of the frame. 12. According to the compensation method described in the scope of claim 5, the compensation method further comprises the following steps: (D) receiving the video signal by using the processor, and storing the previous frame and the current frame in the memory And (E) storing, by the processor, the residual value of the color S 17 201222505 component of each pixel of the previous frame to the memory. 18