Light color correction method and light color correction device

Abstract

Provided in the present application are a light color correction method and a light color correction device. The light color correction method is used for correcting a light-emitting element disposed on a peripheral device and includes receiving a first color in a first gamut used by a display device, wherein the first gamut is greater than a second gamut to which colored light emitted by the light-emitting element belongs; converting the first color in the first gamut into a corrected color in the second gamut according to a chromatic aberration correction matrix; and emitting, by the light-emitting element, the colored light using the corrected color so as to reduce chromatic aberration between the light-emitting element and the display device.

Description

LIGHT COLOR CORRECTION METHOD AND LIGHT COLOR CORRECTION DEVICECROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of Taiwan Invention Application No. 111149545, filed December 22, 2022, Taiwan Utility Model Application No. 111214228, filed December 22, 2022, Chinese Invention Application No. 202211681868.3, filed December 27, 2022, and Chinese Utility Model Application No. 202223489387.0, filed December 27, 2022.TECHNICAL FIELD

[0002] The present application relates to a color correction method and a color correction device, in particular to a light color correction method and a light color correction device which are applied to a light-emitting element.BACKGROUND

[0003] Common peripheral devices on the market, for example, mouses or keyboards, are provided with light-emitting diodes (LEDs), which improve the sense of design of the peripheral devices by means of light colors and blinking patterns of the LEDs, thereby encouraging consumers to buy the products. However, the hardware design of the LEDs provided on the peripheral devices are relatively complex, and light colors which can be displayed by the LEDs will be affected by factors such as materials of the LEDs, circuit designs or voltages, resulting in the light colors being unable to match colors displayed by screens, and causing the problem of chromatic aberration between the light colors of the LEDs and the colors displayed by the screens.

[0004] Therefore, the technical problem to be solved in the present application is how to reduce the chromatic aberration caused when the LEDs display the colors.SUMMARY

[0005] According to one embodiment of the present application, a light color correction method is disclosed, which is used for correcting a light-emitting element disposed on aperipheral device and comprises: receiving a first color in a first gamut used by a display device, wherein the first gamut is greater than a second gamut to which colored light emitted by the light-emitting element belongs; converting the first color in the first gamut into a corrected color in the second gamut according to a chromatic aberration correction matrix; and emitting, by the light-emitting element, the colored light using the corrected color.

[0006] The method further comprises: obtaining a second color in the first gamut used by the display device; obtaining a third color (an actual light color) of the colored light emitted by the controlled light-emitting element according to the second color; calculating, by means of a color mapping algorithm, a fourth color after the second color in the first gamut is mapped to the second gamut; and executing a multiple linear regression algorithm using the third color and the fourth color so as to obtain the chromatic aberration correction matrix.

[0007] According to one embodiment of the present application, the method further comprises: obtaining a second color in the first gamut used by the display device; obtaining a third color of the colored light emitted by the controlled light-emitting element according to the second color; calculating, using a mapping algorithm, a fourth color after the second color in the first gamut is mapped to the second gamut; and executing a linear conversion algorithm using the third color and the fourth color so as to obtain the chromatic aberration correction matrix.

[0008] According to one embodiment of the present application, the chromatic aberration correction matrix is an invertible matrix, and the method further comprises: calculating an inverse matrix of the chromatic aberration correction matrix; and multiplying the color in the second gamut used by the light-emitting element by the inverse matrix so as to obtain the color in the first gamut used by the display device.

[0009] According to one embodiment of the present application, the mapping algorithm comprises a gamut mapping algorithm and a non-iterative minimum gamut clipping algorithm.

[0010] According to one embodiment of the present application, the linear conversion algorithm comprises a color transfer algorithm in correlated color space and a multiple linear regression algorithm.

[0011] According to one embodiment of the present application, a light color correction device is disclosed, which is adapted for correcting light colors of a light-emitting element, wherein the light-emitting element is disposed on a peripheral device, and the light colorcorrection device comprises a processor and a storage medium. The processor is configured to receive a first color in a first gamut used by a display device, wherein the light-emitting element is used for emitting colored light in a second gamut, and the first gamut is greater than the second gamut. The storage medium is coupled to the processor and is configured to store a chromatic aberration correction matrix. The processor is configured to convert the first color in the first gamut into a corrected color in the second gamut according to the chromatic aberration correction matrix, so that the light-emitting element emits the colored light using the corrected color.

[0012] The processor is further configured to obtain a second color in the first gamut used by the display device, to obtain a third color (an actual light color) of the colored light emitted by the controlled light-emitting element according to the second color, to calculate, using a color mapping algorithm, a fourth color after the second color in the first gamut is mapped to the second gamut, and to execute a multiple linear regression algorithm using the third color and the fourth color so as to obtain the chromatic aberration correction matrix.

[0013] According to one embodiment of the present application, the processor is configured to obtain a second color in the first gamut used by the display device, to obtain a third color of the colored light emitted by the controlled light-emitting element according to the second color, to calculate, using a mapping algorithm, a fourth color after the second color in the first gamut is mapped to the second gamut, and to execute a linear conversion algorithm using the third color and the fourth color so as to obtain the chromatic aberration correction matrix.

[0014] According to one embodiment of the present application, the processor is configured to calculate an inverse matrix of the chromatic aberration correction matrix, and to multiply the color in the second gamut used by the light-emitting element by the inverse matrix so as to obtain the color in the first gamut used by the display device.

[0015] According to one embodiment of the present application, the mapping algorithm executed by the processor comprises a gamut mapping algorithm and a non-iterative minimum gamut clipping algorithm which are used for converting the second color to the corrected color.

[0016] According to one embodiment of the present application, the linear conversion algorithm executed by the processor comprises a color transfer algorithm in correlated color space and a multiple linear regression algorithm.

[0017] Therefore, the light color correction device and the light color correction method in the present application can execute light color correction for the light-emitting element without replacing the light-emitting element, thereby solving the problem of chromatic aberration felt by the user.DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 is a configuration diagram of a light color correction device drawn according to one embodiment of the present application.

[0019] FIG. 2 is a schematic diagram in a first gamut and a second gamut drawn according to one embodiment of the present application.

[0020] FIG. 3 is a flow chart of a light color correction method drawn according to one embodiment of the present application.

[0021] FIG. 4 is another flow chart of a light color correction method drawn according to one embodiment of the present application.

[0022] Description of reference numerals:100: light color correction device;110: processor;120: storage medium;122: chromatic aberration correction matrix;200: display device;300: light-emitting element;400: peripheral device;500: first gamut;600: second gamut;A, B, C: actual color;Al, Bl, Cl: first color;Al', Bl', Cl': corrected color; andS310-S330, S410-S440: steps.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] E mbodiments of the present application are illustrated in detail in combination with drawings below.

[0024] Reference is made to FIG. 1, which is a configuration diagram of a light color correction device drawn according to one embodiment of the present application. The light color correction device 100 is electrically connected to or communicatively coupling with a display device 200 and a peripheral device 400.

[0025] In one embodiment, a light-emitting element 300 is disposed on the peripheral device 400 (for example, on a housing or inside the peripheral device), and executes a light emitting operation by means of a current and a voltage provided by the peripheral device 400, so as to highlight or embellish the overall appearance of the peripheral device 400.

[0026] In one embodiment, the light color correction device 100 executes a software to provide a color selection interface (not shown in FIG. 1). The color selection interface includes all colors of a gamut used by the display device 200. The display device 200 is used for displaying the color selection interface from which a user can select a color to be applied to the light-emitting element 300.

[0027] In one embodiment, the light color correction device 100 can transmit an operation instruction, for changing the color, to the peripheral device 400 after obtaining the color to be applied to the light-emitting element 300. A controller (not shown in FIG. 1) of the peripheral device 400 can change, on the basis of the operation instruction, colored light emitted by the light-emitting element 300. In one embodiment, a first gamut used by the display device 200 is greater than a second gamut used by the light-emitting element 300. For example, the range of colors which can be displayed by the display device 200 is larger than the range of colors of the colored light emitted by the light-emitting element 300.

[0028] In one embodiment, the light color correction device 100 is a personal computer, a laptop or a desktop computer, but the present application is not limited to this.

[0029] In one embodiment, the peripheral device 400 is a mouse, a keyboard or a headset, and any device that can expand execution functions of the personal computer, the laptop or the desktop computer falls within the scope of the present application.

[0030] In one embodiment, the light-emitting element 300 is an LED, an organic lightemitting diode (OLED), a mini LED or a micro LED.

[0031] In one embodiment, the display device 200 may be a screen, a display, a projector or an electronic device having a display function, which supports the standard Red Green Blue (sRGB) color space.

[0032] In one embodiment, the light color correction device 100 includes a processor 110 and a storage medium 120. The processor 110 is coupled to the storage medium 120. The storage medium 120 is used for storing a chromatic aberration correction matrix 122.

[0033] In one embodiment, the processor 110 may be a central processing unit (CPU), a system on chip (SoC), an application processor, a digital signal processor or a processing chip or controller having a specific function.

[0034] In one embodiment, the storage medium 120 may include a random access memory (RAM), a non-volatile memory (such as a flash memory), a read-only memory (ROM), a hard disk drive (HDD), a solid state drive (SSD) or an optical memory.

[0035] In some cases, the colored light emitted by the light-emitting element 300 may not match the color selected by the user when watching the display device 200, resulting in the problem of chromatic aberration. For example, after the user selects, from the color selection interface executed by the light color correction device 100, the color to be applied to the lightemitting element 300, the light color correction device 100 can generate a control signal, for example, a pulse width modulation (PWM) value for the peripheral device 400. A firmware of the peripheral device 400 can control the light-emitting element 300 by means of the PWM value to display the selected color. However, the chromatic aberration is caused by the fact that the gamut used by the light-emitting element 300 (that is, the color space of colored light emitted by hardware) is less than the gamut of the display device 200. Since there is a limitation on the hardware of the light-emitting element 300, even if the firmware controls the light-emitting element 300 by means of the PWM value and the light-emitting element 300 is expected to emit the selected color, if the color selected by the user on the basis of the display device 200 exceeds the range which can be shown by the gamut used by the lightemitting element 300, there will be chromatic aberration between the colored light actually emitted by the light-emitting element 300 and the color selected by the user.

[0036] Reference is made to FIG. 2, which is a schematic diagram of a first gamut and a second gamut drawn according to one embodiment of the present application. The display device 200 can display colors in the first gamut 500, and the light-emitting element 300 candisplay colors in the second gamut 600. As shown in FIG. 2, the first gamut 500 is greater than the second gamut 600. In this embodiment, the first gamut 500 includes the second gamut 600.

[0037] When the user watches the display device 200 to select first colors Al, Bl and Cl in the first gamut 500, under the condition of no color correction, the light-emitting element 300 will emit actual colored light by means of actual colors A, B and C in the second gamut 600 supported by the hardware thereof. Although the light-emitting element 300 emit the light according to the first colors Al, Bl and Cl selected by the user, since the second gamut 600 is less than the first gamut 500, the colored light actually emitted by the light-emitting element 300 will correspond to other colors (for example, the colors A, B and C).

[0038] The colors A, B and C as shown in FIG. 2 are uncorrected colors, so that there is chromatic aberration between the uncorrected actual color A and the first color Al in the color space (for example, the distance between two points in FIG. 2), there is chromatic aberration between the uncorrected actual color B and the first color Bl, and there is chromatic aberration between the uncorrected actual color C and the first color Cl. Light colors of the light-emitting element 300 may not meet the expectation of the user due to the problem of the chromatic aberration.

[0039] Therefore, the light color correction device and the light color correction method in the present application can execute light color correction for the light-emitting element without replacing the light-emitting element, thereby solving the problem of the chromatic aberration felt by the user.

[0040] Reference is made to FIG. 3, which is a flow chart of a light color correction method drawn according to one embodiment of the present application. The light color correction method in FIG. 3 can be applied to a light-emitting element disposed on a peripheral device. For the purpose of convenience of understanding the present application, reference is made to FIGS. 1-3.

[0041] In S310, a processor 110 receives a first color in a first gamut used by a display device 200.

[0042] In one embodiment, a user can trigger a specific application program (not shown in the figures) in a light color correction device 100 to enable the light color correction device 100 to execute a color selection interface and display the color selection interface by means ofthe display device 200. Therefore, the user can select first colors, for example, first colors Al, Bl and Cl in FIG. 2, from the color selection interface displayed by the display device 200. The first colors are colors to be applied by the user to a light-emitting element 300 (that is, colors of colored light expected by the user to be emitted by the light-emitting element 300).

[0043] In one embodiment, the light-emitting element 300 can emit colored light in the second gamut, the colors of the colored light are actual colors A, B and C as shown in FIG. 2, wherein the second gamut is less than the first gamut. The actual colors A, B, and C are uncorrected at this moment. In other words, at this moment, the user can feel chromatic aberration between the actual colors and the colors selected from the display device 200.

[0044] As mentioned above, the second gamut of the light-emitting element 300 is less than the first gamut of the display device 200. Although the light-emitting element 300 emits the light according to the first colors, if the first colors exceed the range in the second gamut, the actual colors of the colored light emitted by the light-emitting element 300 will not match the first colors, that is, there is chromatic aberration between the actual colors of the colored light and the first colors. Therefore, before the light-emitting element 300 emits the light, the processor 110 needs to correct the colors firstly so as to provide corrected colors to the lightemitting element 300.

[0045] In S320, the processor 110 converts the first colors in the first gamut into corrected colors in the second gamut according to a chromatic aberration correction matrix 122.

[0046] In one embodiment, the chromatic aberration correction matrix 122 is used for converting the first colors in the first gamut into the corrected colors in the second gamut such that the first chromatic aberration between the first colors and the corrected colors is less than the second chromatic aberration between the first colors and the uncorrected actual colors.

[0047] For example, as shown in FIG. 2, the chromatic aberration correction matrix 122 can convert the first colors Al, Bl and Cl into the corrected colors Al', Bl' and Cl'. As shown in FIG. 2, the first chromatic aberration between the first colors Al, Bl and Cl and the corrected colors Al', Bl' and Cl' will be less than the second chromatic aberration between the first colors Al, Bl and Cl and the actual colors A, B and C, so that the actual colors of the colored light emitted by the light-emitting element 300 are closer to the first colors selected by the user by means of the display device 200 so as to meet the expectation of the user.

[0048] Steps for calculating the chromatic aberration correction matrix is illustrated in FIG. 4.

[0049] In S330, the light-emitting element 300 emits the colored light using the corrected colors.

[0050] In one embodiment, as shown in FIG. 2, the light-emitting element 300 emits the colored light using the corrected colors Al', Bl' and Cl', so that the colors of the colored light actually emitted by the light-emitting element 300 are the same as the corrected colors obtained in S320.

[0051] As mentioned above, there will be great chromatic aberration between the uncorrected actual colors and the first colors. After correction is performed with the method in FIG. 3, the light-emitting element 300 emits the colored light having the corrected colors, the corrected colors will be close to the first colors as much as possible, that is, the degree of the chromatic aberration is reduced. In one embodiment, as shown in FIG. 2, the first chromatic aberration between the first color Al in the color space and the corrected color Al' (for example, the distance between two points of the colors Al and Al') is less than the second chromatic aberration between the first color and the uncorrected actual color A (for example, the distance between two points of the colors Al and A).

[0052] Thus, with regard to the present application, on the premise that the light-emitting element 300 is not required to be replaced, the chromatic aberration between the actual colors of the colored light emitted by the light-emitting element 300 and the first colors selected by the user by means of the display device 200 can be reduced, thereby improving and adjusting the accuracy of the light colors of the light-emitting element 300 so as to meet the expectation of the user.

[0053] Reference is made to FIG. 4, which is another flow chart of a light color correction method drawn according to one embodiment of the present application. FIG. 4 further illustrates the detailed steps of the light color correction method for obtaining a chromatic aberration correction matrix, and these steps can be executed by the light color correction device 100 as shown in FIG. 1.

[0054] In S410, a processor 110 obtains a second color in a first gamut used by a display device 200.

[0055] In one embodiment, the processor 110 selects a plurality of second colors from the first gamut, used by a display device 200, automatically or according to the operation of auser, and the second colors are used as sample data for subsequent calculation of the chromatic aberration correction matrix 122.

[0056] In S420, when a light-emitting element 300 emits colored light according to the second color, the processor 110 obtains a third color in a second gamut of the colored light.

[0057] In one embodiment, the user or the light color correction device 100 makes the lightemitting element 300 emit colored light directly according to the plurality of second colors in the first gamut, and obtains actual colors (i.e. third colors) of the colored light by means of a measurement method, so as to obtain the actual colors (third colors) of the colored light emitted by the controlled light-emitting element 300 according to the second colors. The actual colors (third colors) emitted by the light-emitting element 300 belong to the second gamut of colors that may be displayed by the light-emitting element 300.

[0058] In one embodiment, the processor 110 can execute a software program to obtain the actual colors (third colors) of the colored light emitted by the light-emitting element 300 from the peripheral device 400, or obtain the actual colors (third colors) by means of other measurement methods (such as camera shooting).

[0059] In S430, the processor 110 calculates, using a mapping algorithm, a fourth color after the second color in the first gamut is mapped to the second gamut.

[0060] In one embodiment, the processor 110 executes the mapping algorithm to calculate a plurality of fourth colors which are obtained by converting a plurality of second colors. By means of conversion of the colors in the different gamuts, the processor 110 calculates the fourth color, closest to the second color, in the hardware light-emitting capacity of the lightemitting element 300 in S430.

[0061] In one embodiment, the mapping algorithm may be a gamut mapping algorithm or a non-iterative minimum gamut clipping algorithm.

[0062] In one embodiment, the processor 110 executes the gamut mapping algorithm or the non-iterative minimum gamut clipping algorithm to convert the second color to the fourth color.

[0063] What is worth mentioning is that the light color correction method as shown in FIG. 4 does not limit the execution sequence of S420 and S430, and S420 and S430 can be executed successively or simultaneously.

[0064] In S440, the processor 110 executes a linear conversion algorithm using the third color and the fourth color so as to obtain the chromatic aberration correction matrix 122.

[0065] In one embodiment, the processor 110 obtains a first vector space of a plurality of third colors and a second vector space of a plurality of fourth colors, and executes the linear conversion algorithm to calculate the chromatic aberration correction matrix 122, so that the chromatic aberration correction matrix 122 can be used for converting vectors (for example, the afore-mentioned first colors) of the first vector space into vectors (for example, the aforementioned corrected colors) of the second vector space to make the light-emitting element 300 emit the colored light having the corrected colors.

[0066] What is worth mentioning is that after the user selects a color (for example, the afore-mentioned first color) by watching the display device 200 and the light color correction device 100 sets the color (for example, the afore-mentioned corrected color, hereinafter referred to as operation color) of the light-emitting element 300, if the user wants to confirm the operation color of the light-emitting element 300 subsequently, the user can confirm the color by means of a functional interface provided by software executed by the light color correction device 100. The light color correction device 100 can read the operation color of the light-emitting element 300 from a firmware to confirm whether the setting is correct. Since the operation color is not the color selected by the user by watching the display device 200 (that is, there is an aberration between the operation color and the color selected by the user), if the operation color of the light-emitting element 300 is shown to the user on the display device 200, the user may mistakenly gather that the operation color returned by the firmware is the color originally set by himself. Therefore, before the operation color returned by the firmware is shown on the display device 200, the light color correction device 100 can execute the invertible matrix operation to convert the operation color of the light-emitting element 300 to the color originally set by the user, which is to be confirmed by the user again.

[0067] In one embodiment, the chromatic aberration correction matrix 122 is an invertible matrix. Therefore, the processor 110 can calculate an inverse matrix of the chromatic aberration correction matrix 122, and the inverse matrix is used for rolling the color used by the light-emitting element 300 back to the color used by the display device 200.

[0068] In one embodiment, the processor 110 multiplies the color in the second gamut used by the light-emitting element 300 by the inverse matrix so as to obtain the color in the first gamut used by the display device 200.

[0069] Thus, if the light color correction device 100 obtains the light color of the lightemitting element 300 by means of the firmware, the color originally set by the user (i.e. the color used by the display device 200) can be obtained after the inverse matrix operation, and the user can confirm the operation color set for the light-emitting element 300.

[0070] In one embodiment, the linear conversion algorithm may be a color transfer algorithm in correlated color space and a multiple linear regression algorithm.

[0071] In conclusion, the present application provides the light color correction device and the light color correction method, the chromatic aberration correction matrix is calculated in advance to correct the colors of the light-emitting element, thereby solving the problem of inaccurate color development of the light-emitting element, and reducing the chromatic aberration between the light-emitting element and the display device. Therefore, with regard to the present application, the color development accuracy of the light-emitting element can be improved without replacing or upgrading the light-emitting element, thereby increasing the color consistency of the light-emitting element and the display device.

[0072] The above are only the preferred embodiments of the present application, and are not intended to limit the scope of patent of the present application; therefore, any equivalent change made by means of the content of the present application falls within the scope of the present invention and is disclosed herein.

Claims

CLAIMSWhat is claimed is:

1. A light color correction method, characterized by correcting a light-emitting element disposed on a peripheral device, and comprising: receiving a first color in a first gamut used by a display device, wherein the first gamut is greater than a second gamut to which colored light emitted by the light-emitting element belongs; converting the first color in the first gamut into a corrected color in the second gamut according to a chromatic aberration correction matrix; and emitting, by the light-emitting element, the colored light using the corrected color.

2. The light color correction method according to claim 1, further comprising: obtaining a second color in the first gamut used by the display device; obtaining a third color of the colored light emitted by the light-emitting element according to the second color; calculating, using a mapping algorithm, a fourth color after the second color in the first gamut is mapped to the second gamut; and executing a linear conversion algorithm using the third color and the fourth color so as to obtain the chromatic aberration correction matrix.

3. The light color correction method according to claim 1, wherein the chromatic aberration correction matrix is an invertible matrix, and the light color correction method further comprises: calculating an inverse matrix of the chromatic aberration correction matrix; and multiplying the color in the second gamut used by the light-emitting element by the inverse matrix so as to obtain the color in the first gamut used by the display device.

4. The light color correction method according to claim 2, wherein the mapping algorithm comprises a gamut mapping algorithm and a non-iterative minimum gamut clipping algorithm.

5. The light color correction method according to claim 2, wherein the linear conversion algorithm comprises a color transfer algorithm in correlated color space and a multiple linear regression algorithm.

6. A light color correction device, characterized by being adapted for correcting light colors of a light-emitting element, wherein the light-emitting element is disposed on a peripheral device, and the light color correction device comprises: a processor configured to receive a first color in a first gamut used by a display device, wherein the light-emitting element is used for emitting colored light in a second gamut, and the first gamut is greater than the second gamut; and a storage medium coupled to the processor and configured to store a chromatic aberration correction matrix; wherein the processor is configured to convert the first color in the first gamut into a corrected color in the second gamut according to the chromatic aberration correction matrix, so that the light-emitting element emits the colored light using the corrected color.

7. The light color correction device according to claim 6, wherein the peripheral device comprises a mouse, a keyboard or a headset.

8. The light color correction device according to claim 7, wherein the light-emitting element comprises a light-emitting diode, an organic light-emitting diode, a mini light-emitting diode or a micro light-emitting diode.

9. The light color correction device according to claim 8, wherein the display device comprises a display or a projector which supports the standard red green blue color space.

10. The light color correction device according to claim 6, wherein the processor is configured to obtain a second color in the first gamut used by the display device, to obtain a third color of the colored light emitted by the light-emitting element according to the second color, to calculate, using a mapping algorithm, a fourth color after the second color in the firstgamut is mapped to the second gamut, and to execute a linear conversion algorithm using the third color and the fourth color so as to obtain the chromatic aberration correction matrix.

11. The light color correction device according to claim 10, wherein the processor is configured to calculate an inverse matrix of the chromatic aberration correction matrix, and to multiply the color in the second gamut used by the light-emitting element by the inverse matrix so as to obtain the color in the first gamut used by the display device.

12. The light color correction device according to claim 10, wherein the mapping algorithm executed by the processor comprises a gamut mapping algorithm and a noniterative minimum gamut clipping algorithm which are used for converting the second color to the corrected color.

13. The light color correction device according to claim 10, wherein the linear conversion algorithm executed by the processor comprises a color transfer algorithm in correlated color space and a multiple linear regression algorithm.

14. The light color correction device according to claim 10, wherein the processor transmits an operation instruction, for changing the colored light of the light-emitting element, to the peripheral device.

15. The light color correction device according to claim 14, wherein the peripheral device changes, based on the operation instruction, the colored light emitted by the lightemitting element.

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