TWI811110B - Color temperature transition screen display method, display driver chip, display device and information processing device - Google Patents

Abstract

A color temperature transition picture display method is realized by a display driver chip, which includes: reading N+2 groups of adjustments from a color temperature to RGB adjustment coefficient comparison table according to an initial color temperature, a target color temperature, and an interpolation point N Coefficients (R _C , G _C , B _C ), N is a positive integer, and R _C , G _C , B _C are all positive real numbers, where the corresponding data of each group in the color temperature to RGB adjustment coefficient comparison table are taken from One blackbody locus or Planckian locus on the chromaticity plane; and using the N+2 sets of adjustment coefficients (R _C , G _C , B _C ) to correspondingly adjust N+2 frames of display data (R _IN , G _IN , B _IN ) to generate N+2 frames of display output data (R _OUT , G _OUT , B _OUT ), where, R _OUT = R _C * R _IN , G _OUT = G _C * G _IN , B _OUT = B _C * B _IN , R _IN , G _IN , B _IN are all non-negative integers, and R _OUT , G _OUT , B _OUT are all non-negative real numbers.

Description

Color temperature transition screen display method, display driver chip, display device, and information processing device

The invention relates to a picture display method, in particular to a color temperature transition picture display method.

Please refer to FIG. 1 , which shows a color temperature transition track on a chromaticity plane in a conventional color temperature transition picture display method. As shown in FIG. 1, the existing color temperature transition picture display method is to perform linear interpolation on a straight line to generate a plurality of different transition color temperature points, so that when the picture is converted from one color temperature (for example, 10000 degrees K) to another color temperature ( For example, the process of 600 degrees K) makes the viewer have a more comfortable visual experience.

However, on the chromaticity plane, the blackbody locus or the Planckian locus formed by connecting points of different color temperatures T _C (K) is a curve rather than a straight line. There will be a large color temperature difference between two adjacent interpolation color temperature points in an interpolation color temperature point, resulting in flickering phenomenon in the picture. In order to overcome this problem, the existing color temperature transition image display method needs to add interpolation color temperature points, that is, more interpolation color temperature images need to be added between two color temperature images.

In order to solve the above problems, there is an urgent need in the art for a novel method for displaying images with color temperature transitions.

One object of the present invention is to disclose a color temperature transition screen display method, which can generate multiple RGB adjustments corresponding to multiple color temperatures by setting multiple color temperature points at intervals on a blackbody locus or Planckian locus of the chromaticity plane coefficients, and correspondingly adjust the RGB data of the continuously displayed multi-frame images according to these RGB adjustment coefficients, so as to avoid flickering of the images during the color temperature adjustment process.

Another object of the present invention is to disclose a display driver chip, which can prevent a display screen from flickering during the color temperature adjustment process by using the aforementioned color temperature transition screen display method.

Another object of the present invention is to disclose a display device, which can avoid flickering on the display screen during the color temperature adjustment process by using the above-mentioned color temperature transition screen display method.

Another object of the present invention is to disclose an information processing device, which can avoid flickering on the display screen during the color temperature adjustment process by using the above-mentioned color temperature transition screen display method.

In order to achieve the above purpose, a color temperature transition screen display method is proposed, which is implemented by a display driver chip, which includes: According to an initial color temperature, a target color temperature and an interpolation point N from a color temperature to RGB adjustment coefficient comparison table Read N+2 sets of adjustment coefficients (R _C , G _C , B _C ), N is a positive integer, and R _C , G _C , and B _C are all positive real numbers, where the color temperature is included in the RGB adjustment coefficient comparison table Each set of corresponding data is taken from a black body locus or Planckian locus on the chromaticity plane; and N+2 frames of display data are correspondingly adjusted by using the N+2 sets of adjustment coefficients (R _C , G _C , B _C ) (R _IN , G _IN , B _IN ) to generate N+2 frames of display output data (R _OUT , G _OUT , B _OUT ), where, R _OUT = R _C * R _IN , G _OUT = G _C * G _IN , B _OUT = B _C * B _IN , R _IN , G _IN , and B _IN are all non-negative integers, and R _OUT , G _OUT , and B _OUT are all non-negative real numbers.

In one embodiment, the display driver chip starts the color temperature transition frame display method according to an enable signal.

In one embodiment, the color temperature transition image display method further includes performing linear interpolation between different color temperature points in the color temperature to RGB adjustment coefficient table to increase the number of color temperature points.

In order to achieve the above object, the present invention further proposes a display driver chip, which has a color temperature transition processing unit, and the color temperature transition processing unit has a color temperature to RGB adjustment coefficient comparison table for multi-frame display data (R _IN , G _IN , B _IN ) performs a color temperature transition process to generate multi-frame display output data (R _OUT , G _OUT , B _OUT ), R _IN , G _IN , and B _IN are all non-negative integers, and R _OUT , G _OUT , and B _OUT are all non-negative Real numbers, and the color temperature transition processing program includes: The color temperature transition processing unit reads N+2 sets of adjustment coefficients (R _C , G _C , B _C ), N is a positive integer, and R _C , G _C , B _C are all positive real numbers, where the corresponding data of each group in the color temperature to RGB adjustment coefficient comparison table are taken from the chromaticity plane One of the above blackbody locus or Planckian locus; and the color temperature transition processing unit uses the N+2 sets of adjustment coefficients ( _RC , G _C , B _C ) to correspondingly adjust N+2 frames of display data (R _IN , G _IN , B _IN ) to generate N+2 frames of display output data (R _OUT , G _OUT , B _OUT ), where R _OUT = R _C * R _IN , G _OUT = G _C * G _IN , B _OUT = B _C * B _IN , R _IN , G _IN , and B _IN are all non-negative integers, and R _OUT , G _OUT , and B _OUT are all non-negative real numbers.

In one embodiment, the display driving chip further has a driving unit for generating corresponding pixel voltages according to the display output data (R _OUT , G _OUT , B _OUT ) to drive a display panel .

In one embodiment, the color temperature transition processing unit starts the color temperature transition frame display process according to an enable signal.

In one embodiment, the color temperature transition image display program further includes performing linear interpolation between different color temperature points in the color temperature to RGB adjustment coefficient table to increase the number of color temperature points.

To achieve the above object, the present invention further proposes a display device, which has a display panel and a display driver chip for driving the display panel, the display driver chip has a color temperature transition processing unit, and the color temperature transition processing unit has a color temperature transition processing unit. To the RGB adjustment coefficient comparison table to perform a color temperature transition process on multi-frame display data (R _IN , G _IN , B _IN ) to generate multi-frame display output data (R _OUT , G _OUT , B _OUT ), R _IN , G _IN and B _IN are both non-negative integers, R _OUT , G _OUT , and B _OUT are all non-negative real numbers, and the color temperature transition processing program includes: The color temperature transition processing unit is based on an initial color temperature, a target color temperature, and an interpolation point number N Read N+2 sets of adjustment coefficients (R _C , G _C , B _C ) from the color temperature to RGB adjustment coefficient comparison table, N is a positive integer, and R _C , G _C , and B _C are all positive real numbers, where, Each set of corresponding data in the color temperature to RGB adjustment coefficient comparison table is taken from a blackbody locus or Planckian locus on the chromaticity plane; and the color temperature transition processing unit utilizes the N+2 sets of adjustment coefficients (R _C , G _C , B _C ) correspondingly adjust N+2 frames of display data (R _IN , G _IN , B _IN ) to generate N+2 frames of display output data (R _OUT , G _OUT , B _OUT ), where R _OUT = R _C * R _IN , G _OUT = G _C * G _IN , B _OUT = B _C * B _IN , R _IN , G _IN , and B _IN are all non-negative integers, and R _OUT , G _OUT , and B _OUT are all non-negative real numbers.

In one embodiment, the display driver chip further has a driver unit for generating corresponding pixel voltages according to the display output data (R _OUT , G _OUT , B _OUT ) to drive the display panel.

In one embodiment, the color temperature transition processing unit starts the color temperature transition frame display process according to an enable signal.

In one embodiment, the color temperature transition image display program further includes performing linear interpolation between different color temperature points in the color temperature to RGB adjustment coefficient table to increase the number of color temperature points.

In a possible embodiment, the display panel can be a liquid crystal display panel, a micro light emitting diode display panel, a sub-millimeter light emitting diode display panel, a quantum dot light emitting diode display panel or an organic light emitting diode display panel body display panel.

To achieve the above purpose, the present invention further proposes an information processing device, which has a central processing unit and the aforementioned display device, wherein the central processing unit is used to communicate with the display device.

In a possible embodiment, the information processing device may be a smart handheld device, a portable computer, a wearable device, a vehicle computer or an access control system.

In order to enable your review committee members to further understand the structure, features and purpose of the present invention, drawings and detailed descriptions of preferred specific embodiments are hereby attached.

Principle of the present invention is: (1) Using the black body locus or Planckian locus connecting an initial color temperature point and a target color temperature point on the chromaticity plane as the locus of the interpolation color temperature point to even out the color temperature difference between two adjacent interpolation color temperature points; (2) Using the initial color temperature point, the interpolation color temperature points and the target color temperature point to generate a plurality of corresponding (R, G, B) modulation coefficient combinations; and (3) Adjust a frame (R, G, B) display data with a corresponding (R, G, B) modulation factor combination during each frame display period between the initial color temperature point and the target color temperature point, Thereby optimizing the viewer's visual experience.

Please refer to FIG. 2 , which shows a block diagram of an embodiment of the display device of the present invention. As shown in Figure 2, a display device 100 has a display panel 110 and a display driver chip 120 for driving the display panel 110, wherein the display panel 110 can be a liquid crystal display panel, a micro light emitting diode display panel, A millimeter light emitting diode display panel, a quantum dot light emitting diode display panel or an organic light emitting diode display panel.

The display driver chip 120 has a color temperature transition processing unit 121 and a driving unit 122, wherein the color temperature transition processing unit 121 has a color temperature to RGB adjustment coefficient comparison table to perform multi-frame display data (R _IN , G _IN , B _IN ) A color temperature transition processing program to generate multiple frames of display output data (R _OUT , G _OUT , B _OUT ); and the driving unit 122 is used to generate pixel voltages according to the display output data (R _OUT , G _OUT , B _OUT ) to drive the display Panel 110. The color temperature transition processing procedure includes: (1) The color temperature transition processing unit 121 reads N+2 sets of adjustment coefficients from the color temperature to RGB adjustment coefficient comparison table according to an initial color temperature T1, a target color temperature T2 and an interpolation point N. (R _C , G _C , B _C ), N is a positive integer, and R _C , G _C , B _C are all positive real numbers, where the corresponding data of each group in the color temperature to RGB adjustment coefficient comparison table are taken from the color one of the blackbody locus or Planckian locus on the degree plane; and (2) the color temperature transition processing unit 121 uses the N+2 sets of adjustment coefficients (R _C , G _C , B _C ) to correspondingly adjust N+2 frames of display data ( R _IN , G _IN , B _IN ) to generate N+2 frames of display output data (R _OUT , G _OUT , B _OUT ), where R _OUT = R _C * R _IN , G _OUT = G _C * G _IN , B _OUT = B _C * B _IN , R _IN , G _IN , and B _IN are all non-negative integers, and R _OUT , G _OUT , and B _OUT are all non-negative real numbers.

In addition, the color temperature transition processing unit 121 can start the color temperature transition processing procedure according to the enable signal EN.

In addition, the color temperature transition processing unit 121 can also perform linear interpolation between different color temperature points in the color temperature to RGB adjustment coefficient table to increase the number of color temperature points.

Please refer to Table 1, which is an embodiment of the color temperature to RGB adjustment coefficient comparison table. As shown in Table 1, when the color temperature is 4000 degrees K, the corresponding set of adjustment coefficients (R _C , G _C , B _C ) = (255/255, 209/255, 163/255), assuming the display data (R _IN , G _IN , B _IN ) = (125, 125, 125), then the adjusted display output data (R _OUT , G _OUT , B _OUT ) = (125, 125*209/255, 125*163/ 255); when the color temperature is 4100 degrees K, its corresponding set of adjustment coefficients (R _C , G _C , B _C ) = (255/255, 211/255, 168/255), assuming that the display data (R _IN , G _IN , B _IN ) = (125, 125, 125), then the adjusted display output data (R _OUT , G _OUT , B _OUT ) = (125, 125*211/255, 125*168/255); When the color temperature is 4200 degrees K, the corresponding set of adjustment coefficients (R _C , G _C , B _C ) = (255/255, 213/255, 173/255), assuming that the display data (R _IN , G _IN , B _IN ) = (125, 125, 125), then the adjusted display output data (R _OUT , G _OUT , B _OUT ) = (125, 125*213/255, 125*173/255); and so on . Table 1 color temperature(K) R _C G _C B _C 4000 255/255 209/255 163/255 4100 255/255 211/255 168/255 4200 255/255 213/255 173/255 4300 255/255 215/255 177/255 4400 255/255 217/255 182/255 4500 255/255 219/255 186/255 4600 255/255 221/255 190/255 4700 255/255 223/255 194/255 4800 255/255 225/255 198/255

In addition, assuming that the initial color temperature T1 = 4000 degrees K, the target color temperature T2 = 4800 degrees K, and the number of interpolation points N = 7, there will be 9 frames of display data (R _IN , G _IN , B _IN ) each of which is different from each other. The adjustment coefficients (R _C , G _C , B _C ) are adjusted to 9 frames of display output data (R _OUT , G _OUT , B _OUT ) to produce a good color temperature transition display effect.

According to the above description, the present invention discloses a color temperature transition image display method. Please refer to FIG. 3 , which shows a flowchart of an embodiment of a color temperature transition screen display method of the present invention, which is realized by a display driver chip. As shown in FIG. 3 , the method for displaying a color temperature transition picture includes: reading N+2 sets of adjustment coefficients (R _C , G _C , B _C ), N is a positive integer, and R _C , G _C , B _C are all positive real numbers, where the corresponding data of each group in the color temperature to RGB adjustment coefficient comparison table are taken from the chromaticity plane One of the blackbody locus or Planckian locus (step a); and using the N+2 sets of adjustment coefficients (R _C , G _C , B _C ) to correspondingly adjust N+2 frames of display data (R _IN , G _IN , B _IN ) to generate N+2 frames of display output data (R _OUT , G _OUT , B _OUT ), where, R _OUT = R _C * R _IN , G _OUT = G _C * G _IN , B _OUT = B _C * B _IN , R _IN , G _IN , B _IN are all non-negative integers, and R _OUT , G _OUT , B _OUT are all non-negative real numbers (step b).

In the above steps, the display driver chip can start the color temperature transition picture display method according to an enable signal.

In addition, the color temperature transition image display method can also perform linear interpolation between different color temperature points in the color temperature to RGB adjustment coefficient table to increase the number of color temperature points.

According to the above description, the present invention further provides an information processing device. Please refer to FIG. 4 , which shows a block diagram of an embodiment of an information processing device of the present invention. As shown in FIG. 4 , an information processing device 200 has a central processing unit 210 and a display device 220 , wherein the display device 220 is realized by the display device 100 , and the central processing unit 210 is used for communicating with the display device 220 . In addition, the information processing device 200 can be a smart handheld device, a portable computer, a wearable device, a vehicle computer or an access control system.

With the design disclosed above, the present invention has the following advantages: 1. The color temperature transition screen display method of the present invention can generate multiple RGB adjustment coefficients corresponding to multiple color temperatures by setting multiple color temperature points at intervals on a blackbody locus or Planckian locus of the chromaticity plane, and according to the These RGB adjustment coefficients correspond to the adjustment of the RGB data of the continuously displayed multi-frame images, so as to avoid flickering of the images during the color temperature adjustment process. 2. The display driver chip of the present invention can avoid the flickering phenomenon of a display screen during the color temperature adjustment process by the above-mentioned color temperature transition screen display method. 3. The display device of the present invention can avoid flickering on the display screen during the color temperature adjustment process by using the above-mentioned color temperature transition screen display method. 4. The information processing device of the present invention can avoid flickering on the display screen during the color temperature adjustment process by using the above-mentioned color temperature transition screen display method.

What is disclosed in this case is a preferred embodiment. For example, any partial changes or modifications derived from the technical ideas of this case and easily deduced by those who are familiar with the technology are within the scope of the patent right of this case.

To sum up, regardless of the purpose, means and efficacy of this case, it shows that it is very different from the conventional technology, and its first invention is practical, and it does meet the patent requirements of the invention. I implore your review committee to understand it clearly and grant a patent as soon as possible. Society is for the Most Prayer.

100: display device 110: display panel 120: display driver chip 121: color temperature transition processing unit 122: drive unit 200: information processing device 210: central processing unit 220: display device Step a: according to an initial color temperature, a target color temperature and a The number of interpolation points N reads N+2 sets of adjustment coefficients (R _C , G _C , B _C ) from a color temperature to RGB adjustment coefficient comparison table, N is a positive integer, and R _C , G _C , and B _C are all Positive real number, wherein, each group of corresponding data in the color temperature to RGB adjustment coefficient comparison table is all taken from a blackbody locus or Planckian locus on the chromaticity plane. Step b: Utilize the N+2 groups of adjustment coefficients (R _C , G _C , B _C ) correspondingly adjust N+2 frames of display data (R _IN , G _IN , B _IN ) to generate N+2 frames of display output data (R _OUT , G _OUT , B _OUT ), where, R _OUT = R _C * R _IN , G _OUT = G _C * G _IN , B _OUT = B _C * B _IN , R _IN , G _IN , B _IN are all non-negative integers, R _OUT , G _OUT , B _OUT are all non-negative real numbers

FIG. 1 shows a color temperature transition locus on a chromaticity plane in a conventional color temperature transition picture display method. FIG. 2 shows a block diagram of an embodiment of the display device of the present invention. FIG. 3 is a flow chart of an embodiment of a color temperature transition image display method of the present invention. FIG. 4 is a block diagram of an embodiment of an information processing device of the present invention.

Step a: Read N+2 sets of adjustment coefficients (R _C , G _C , B _C ) from a color temperature to RGB adjustment coefficient comparison table according to an initial color temperature, a target color temperature, and an interpolation point N, where N is positive Integer, and R _C , G _C , and B _C are all positive real numbers, where the corresponding data of each group in the color temperature to RGB adjustment coefficient comparison table are all taken from a black body locus or Planck locus on the chromaticity plane

Step b: using the N+2 sets of adjustment coefficients (R _C , G _C , B _C ) to correspondingly adjust N+2 frames of display data (R _IN , G _IN , B _IN ) to generate N+2 frames of display output data ( R _OUT , G _OUT , B _OUT ), where, R _OUT =R _C * R _IN , G _OUT =G _C * G _IN , B _OUT =B _C * B _IN , R _IN , G _IN , B _IN are non-negative Integer, R _OUT , G _OUT , B _OUT are non-negative real numbers

Claims (14)

A color temperature transition picture display method is realized by a display driver chip, which includes: reading N+2 groups of adjustments from a color temperature to RGB adjustment coefficient comparison table according to an initial color temperature, a target color temperature, and an interpolation point N Coefficients (R _C , G _C , B _C ), N is a positive integer, and R _C , G _C , B _C are all positive real numbers, where the corresponding data of each group in the color temperature to RGB adjustment coefficient comparison table are taken from A blackbody locus on the chromaticity plane; and using the N+2 sets of adjustment coefficients (R _C , G _C , B _C ) to correspondingly adjust N+2 frames of display data (R _IN , G _IN , B _IN ) to generate N +2 frames display output data (R _OUT , G _OUT , B _OUT ), among them, R _OUT =R _C * R _IN , G _OUT =G C * G _IN , B _OUT = _{B C *} B _IN , R _IN , G _IN and B _IN are both non-negative integers, and R _OUT , G _OUT and B _OUT are all non-negative real numbers. The method for displaying a color temperature transitional picture as described in item 1 of the scope of the patent application, wherein the display driver chip starts the displaying method for a color temperature transitional picture according to an enable signal. The color temperature transition screen display method described in item 1 of the scope of the patent application further includes performing linear interpolation between different color temperature points in the color temperature to RGB adjustment coefficient table to increase the number of color temperature points. A display driver chip, which has a color temperature transition processing unit, the color temperature transition processing unit has a color temperature to RGB adjustment coefficient comparison table to perform a color temperature transition processing program for multi-frame display data (R _IN , G _IN , B _IN ) Generate multi-frame display output data (R _OUT , G _OUT , B _OUT ), R _IN , G _IN , B _IN are non-negative integers, R _OUT , G _OUT , B _OUT are non-negative real numbers, and the color temperature transition processing program includes : The color temperature transition processing unit reads N+2 sets of adjustment coefficients (R _C , G _C , B _C ) from the color temperature to RGB adjustment coefficient comparison table according to an initial color temperature, a target color temperature, and an interpolation point N, N is a positive integer, and R _C , G _C , and B _C are all positive real numbers, where the corresponding data of each group in the color temperature to RGB adjustment coefficient comparison table are all taken from a blackbody locus on the chromaticity plane; and the color temperature The transition processing unit uses the N+2 sets of adjustment coefficients (R _C , G _C , B _C ) to correspondingly adjust N+2 frames of display data (R _IN , G _IN , B _IN ) to generate N+2 frames of display output data ( R _OUT , G _OUT , B _OUT ), where, R _OUT =R _C * R _IN , G _OUT =G _C * G _IN , B _OUT =B _C * B _IN , R _IN , G _IN , B _IN are non-negative Integer, R _OUT , G _OUT , B _OUT are all non-negative real numbers. The display driver chip as described in item 4 of the scope of the patent application further has a driving unit, which is used to generate corresponding pixel voltages according to the display output data (R _OUT , G _OUT , B _OUT ) to drive A display panel. The display driver chip described in claim 4 of the scope of the patent application, wherein the color temperature transition processing unit starts the color temperature transition image display process according to an enable signal. The display driver chip described in item 4 of the scope of the patent application, wherein the color temperature transition screen display program further includes performing linear interpolation between different color temperature points in the color temperature to RGB adjustment coefficient table to increase the number of color temperature points. A display device, which has a display panel and a display driver chip for driving the display panel, the display driver chip has a color temperature transition processing unit, and the color temperature transition processing unit has a color temperature to RGB adjustment coefficient comparison table for multiple Frame display data (R _IN , G _IN , B _IN ) undergo a color temperature transition process to generate multi-frame display output data (R _OUT , G _OUT , B _OUT ), R _IN , G _IN , B _IN are all non-negative integers, R _OUT , G _OUT , and B _OUT are all non-negative real numbers, and the color temperature transition processing program includes: The color temperature transition processing unit adjusts the coefficient comparison table from the color temperature to RGB according to an initial color temperature, a target color temperature, and an interpolation point N Read N+2 sets of adjustment coefficients (R _C , G _C , B _C ), N is a positive integer, and R _C , G _C , and B _C are all positive real numbers, where the color temperature is included in the RGB adjustment coefficient comparison table Each set of corresponding data is taken from a blackbody locus on the chromaticity plane; and the color temperature transition processing unit uses the N+2 sets of adjustment coefficients (R _C , G _C , B _C ) to correspondingly adjust N+2 frames of display data (R _IN , G _IN , B _IN ) to generate N+2 frames of display output data (R _OUT , G _OUT , B _OUT ), where R _OUT =R _C * R _IN , G _OUT =G _C * G _IN , B _OUT =B _C * B _IN , R _IN , G _IN , and B _IN are all non-negative integers, and R _OUT , G _OUT , and B _OUT are all non-negative real numbers. The display device described in claim 8 of the scope of the patent application, wherein the display driver chip further has a driver unit, which is used to generate corresponding output data (R _OUT , G _OUT , B _OUT ) according to the display pixel voltage to drive the display panel. The display device described in claim 8 of the patent application, wherein the color temperature transition processing unit starts the color temperature transition image display process according to an enable signal. The display device described in claim 8 of the patent application, wherein the color temperature transition image display program further includes performing linear interpolation between different color temperature points in the color temperature to RGB adjustment coefficient table to increase the number of color temperature points. The display device described in item 8 of the scope of the patent application, wherein the display panel is composed of a liquid crystal display panel, a micro light emitting diode display panel, a sub-millimeter light emitting diode display panel, a quantum dot light emitting diode A display panel selected from the group formed by the display panel and an organic light emitting diode display panel. An information processing device, which has a central processing unit and a display device as described in any one of items 8 to 12 of the scope of the patent application, wherein the central processing unit is used to communicate with the display device. The information processing device described in item 13 of the patent application is an electronic device selected from a group consisting of a smart handheld device, a portable computer, a wearable device, a vehicle computer and an access control system .