IP Library › Granted Patent US 12664922
Granted Patent B2
US 12664922 · App. 18/744,775 · Granted Jun 23, 2026

Display control device, display control method, and computer-readable storage medium

Inventor: Hiroshi Takeshita (Yokohama, JP)
Assignee: JVCKENWOOD Corporation
G09G3/20G09G2320/0613G09G2320/0686G09G2360/16G09G2380/08
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Quick Facts
Patent No.
US 12664922
App. No.
18/744,775
Granted
Jun 23, 2026
Kind
B2
Abstract

A display control device to which an image signal is supplied from outside includes: a display control unit configured to control a display of a screen image on a display unit in response to the image signal supplied; a comparison unit configured to make a comparison between a peak level of an image signal of a text window portion displayed on the display unit and a peak level of an image signal of an image of an image portion displayed on the display unit; and a luminance control unit configured to, when a result of the comparison indicates that the peak level of the image signal of the image of the image portion is higher than the peak level of the image signal of the text window portion, control an adjustment of a gain in a direction of decreasing a peak level of the whole screen image.

Claims (21)

1 . A display control device to which an image signal is supplied from outside, the display control device comprising:

at least one memory that stores executable instructions;

at least one processor that executes the executable instructions to perform operations, the operations comprising:

controlling a display of a screen image on a display unit in response to the image signal supplied;

detecting a text window portion displayed on the display unit;

generating a histogram of the screen image in which a signal level corresponding to the text window portion is excluded to analyze a peak level of an image portion;

making a comparison between a level of the text window portion and the peak level of the image portion; and

controlling a luminance in a manner that, when the comparison indicates that the level of the text window portion is equal to or higher than the peak level of the image portion, a clip level for a display of the highest gradation level of the text window portion is reduced to a level close to the peak level of the image portion while a brightness of the image portion is not changed, and when the comparison indicates that the level of the text window portion is lower than the peak level of the image portion, a gain of 1 or less is applied to the whole screen image.

2 . The display control device according to claim 1 , wherein the image displayed in the image portion is an image to be interpreted that does not include any pixels having a level of 255 in gradation of 8 bits corresponding to a white level of 100%.

3 . A display control method comprising:

controlling a display of a screen image on a display unit in response to an image signal supplied;

detecting a text window portion displayed on the display unit;

generating a histogram of the screen image in which a signal level corresponding to the text window portion is excluded to analyze a peak level of an image portion;

making a comparison between a level of the text window portion and the peak level of the image portion; and

controlling a luminance in a manner that, when the comparison indicates that the level of the text window portion is equal to or higher than the peak level of the image portion, a clip level for a display of the highest gradation level of the text window portion is reduced to a level close to the peak level of the image portion while a brightness of the image portion is not changed, and when the comparison indicates that the level of the text window portion is lower than the peak level of the image portion, a gain of 1 or less is applied to the whole screen image.

4 . A non-transitory computer-readable storage medium storing a computer program causing a computer to execute:

controlling a display of a screen image on a display unit in response to an image signal supplied;

detecting a text window portion displayed on the display unit;

generating a histogram of the screen image in which a signal level corresponding to the text window portion is excluded to analyze a peak level of an image portion;

making a comparison between a level of the text window portion and the peak level of the image portion; and

controlling a luminance in a manner that, when the comparison indicates that the level of the text window portion is equal to or higher than the peak level of the image portion, a clip level for a display of the highest gradation level of the text window portion is reduced to a level close to the peak level of the image portion while a brightness of the image portion is not changed, and when the comparison indicates that the level of the text window portion is lower than the peak level of the image portion, a gain of 1 or less is applied to the whole screen image.