US-12626630-B2 - Display and method of adjusting tone of display

US12626630B2US 12626630 B2US12626630 B2US 12626630B2US-12626630-B2

Abstract

Disclosed is a method of adjusting tone of a display, including setting a gamma value range according to an input signal, adjusting a gamma value of each of a plurality of grayscales within a grayscale range so that a plurality of gamma values of the grayscales gradually change within the gamma value range and are different from one another, and adjusting an image signal according to the adjusted gamma values of the grayscales and outputting the adjusted image signal to a display panel. The adjusted gamma values of the grayscales increase or decrease as a grayscale level of each grayscale rises. A display adopting the method of adjusting tone of the display is also provided.

Inventors

Bing-Nan Lin
Cheng-Kuan Hou
Cheng-Yen Yeh
Yu-Cheng Lin
Hsu-Ho Wu

Assignees

HANNSTAR DISPLAY CORPORATION

Dates

Publication Date: 20260512
Application Date: 20240418
Priority Date: 20240126

Claims (8)

1 . A method of adjusting tone of a display, comprising: setting a gamma value range according to an input signal; adjusting a plurality of gamma values of a plurality of grayscales within a grayscale range respectively so that the gamma values of the grayscales gradually change within the gamma value range and are different from one another; and adjusting an image signal according to the adjusted gamma values of the grayscales and outputting the adjusted image signal to a display panel, wherein the adjusted gamma values of the grayscales increase or decrease as a grayscale level of each of the grayscales rises, the adjusted gamma value of each of the grayscales satisfies a relational expression as follows: g=(g2−g1)·(nL) g3 +g1, where g is the adjusted gamma value of each of the grayscales, g1 is one of a minimum gamma value and a maximum gamma value of the gamma value range, g2 is other one of the minimum gamma value and the maximum gamma value of the gamma value range, nL is a normalized grayscale of each of the grayscales and is within a range of 0 to 1, and g3 is within a range of 0.5 to 3.
2 . The method of adjusting tone of the display of claim 1 , further comprising: generating a corresponding adjusted grayscale according to the adjusted gamma value of each of the grayscales, wherein the adjusted grayscale satisfies a relational expression as follows: nL′=nL (g/2.2) , where nL′ is a normalized grayscale of the adjusted grayscale and is within a range of 0 to 1.
3 . The method of adjusting tone of the display of claim 1 , wherein the display is suitable for displaying a first color and a second color different from each other, a maximum brightness of the first color is different from a maximum brightness of the second color, and setting the gamma value range comprises: setting a first gamma value range of the gamma value range according to the maximum brightness of the first color, and setting a second gamma value range of the gamma value range according to the maximum brightness of the second color, wherein the first gamma value range is different from the second gamma value range, the maximum brightness of the first color is greater than the maximum brightness of the second color, and a maximum gamma value of the first gamma value range is greater than a maximum gamma value of the second gamma value range.
4 . The method of adjusting tone of the display of claim 1 , wherein the input signal is generated by operating a user interface or an input component of the display.
5 . A display, comprising: a display panel, suitable for displaying according to an image signal; and a control unit, electrically coupled to the display panel and configured to: set a gamma value range according to an input signal; adjust a plurality of gamma values of a plurality of grayscales within a grayscale range respectively so that the gamma values of the grayscales gradually change within the gamma value range and are different from one another; and adjust the image signal according to the adjusted gamma values of the grayscales and output the adjusted image signal to the display panel, wherein the adjusted gamma values of the grayscales increase or decrease as a grayscale level of each of the grayscales rises, the adjusted gamma value of each of the grayscales satisfies a relational expression as follows: g=(g2−g1)·(nL) g3 +g1, where g is the adjusted gamma value of each of the grayscales, g1 is one of a minimum gamma value and a maximum gamma value of the gamma value range, g2 is other one of the minimum gamma value and the maximum gamma value of the gamma value range, nL is a normalized grayscale of each of the grayscales and is within a range of 0 to 1, and g3 is within a range of 0.5 to 3.
6 . The display of claim 5 , wherein the control unit is further configured to: generate a corresponding adjusted grayscale according to the adjusted gamma value of each of the grayscales, wherein the adjusted grayscale satisfies a relational expression as follows: nL′=nL (g/2.2) , where nL′ is a normalized grayscale of the adjusted grayscale and is within a range of 0 to 1.
7 . The display of claim 5 , suitable for displaying a first color and a second color different from each other, wherein a maximum brightness of the first color is different from a maximum brightness of the second color, and setting the gamma value range comprises: setting a first gamma value range of the gamma value range according to the maximum brightness of the first color, and setting a second gamma value range of the gamma value range according to the maximum brightness of the second color, wherein the first gamma value range is different from the second gamma value range, the maximum brightness of the first color is greater than the maximum brightness of the second color, and a maximum gamma value of the first gamma value range is greater than a maximum gamma value of the second gamma value range.
8 . The display of claim 5 , wherein the input signal is generated by operating a user interface or an input component of the display.

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims the priority benefit of Taiwan application serial no. 113103100, filed on Jan. 26, 2024. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification. BACKGROUND Technical Field The disclosure relates to a display technology, and in particular to a display and a method of adjusting tone of the display. Description of Related Art Adjusting the brightness of grayscales is crucial for the display quality of a display. In order to satisfy different display requirements or contexts of use and to optimize display quality, a gamma curve of grayscale brightness against grayscale of the display must be properly adjusted. However, at present, these adjustments cannot be performed by end product manufacturers (e.g., system manufacturers) or consumers. As a result, the image quality of the display cannot be easily optimized as per usage requirements. SUMMARY The disclosure provides a method of adjusting tone of a display, which facilitates an adjustment of enhancing or suppressing low grayscales or high grayscales and can satisfy to a more diverse taste in color. The disclosure provides a display, which facilitates an adjustment of tone of display grayscales and can better satisfy adjustment requirements of a user end. A method of adjusting tone of a display of the disclosure includes setting a gamma value range according to an input signal, adjusting gamma values of a plurality of grayscales within a grayscale range respectively so that the gamma values of the grayscales gradually change within the gamma value range and are different from one another, and adjusting an image signal according to the adjusted gamma values of the grayscales and outputting the adjusted image signal to a display panel. The adjusted gamma values of the grayscales increase or decrease as a grayscale level of each grayscale rises. In an embodiment of the disclosure, according to the method of adjusting tone of the display, the adjusted gamma value of each grayscale satisfies a following relational expression: g=(g2−g1)·(nL)g3+g1 where g is the adjusted gamma value of each grayscale, g1 is one of a minimum gamma value and a maximum gamma value of the gamma value range, g2 is other one of the minimum gamma value and the maximum gamma value of the gamma value range, nL is a normalized grayscale of each grayscale and is within a range of 0 to 1, and g3 is within a range of 0.5 to 3. In an embodiment of the disclosure, the method of adjusting tone of the display further includes generating a corresponding adjusted grayscale according to the adjusted gamma value of each grayscale. The adjusted grayscale satisfies a following relational expression: nL′=nL(g/2.2), where nL′ is a normalized grayscale of the adjusted grayscale and is within a range of 0 to 1. In an embodiment of the disclosure, the display of the method of adjusting tone of the display is suitable for displaying a first color and a second color different from each other. A maximum brightness of the first color is different from a maximum brightness of the second color. Setting the gamma value range includes setting a first gamma value range of the gamma value range according to the maximum brightness of the first color and setting a second gamma value range of the gamma value range according to the maximum brightness of the second color. The first gamma value range is different from the second gamma value range. The maximum brightness of the first color is greater than the maximum brightness of the second color, and a maximum gamma value of the first gamma value range is greater than a maximum gamma value of the second gamma value range. In an embodiment of the disclosure, the input signal of the method of adjusting tone of the display is generated by operating a user interface or an input component of the display. A display of the disclosure includes a display panel and a control unit. The display panel is suitable for displaying according to an image signal. The control unit is electrically coupled to the display panel and is configured to set a gamma value range according to an input signal, adjust gamma values of a plurality of grayscales within a grayscale range respectively so that the gamma values of the grayscales gradually change within the gamma value range and are different from one another, and adjust an image signal according to the adjusted gamma values of the grayscales and outputting the adjusted image signal to the display panel. The adjusted gamma values of the grayscales increase or decrease as a grayscale level of each grayscale rises. In an embodiment of the disclosure, the adjusted gamma value of each grayscale of the display satisfies a following relational expression: g=(g2−g1)·(nL)g3+g1, where g is the adjusted gamma value of each grayscale, g1 is one of a minimum gamma value and a maximum gamma value of the gamma value range,