Granted Patent B2

US 12,367,840 · App. 18/891,272 · Granted Jul 22, 2025

Inventors: Atsunori Nagato (Kameyama, JP); Takashi Sasaki (Kameyama, JP)

Assignee: Sharp Display Technology Corporation

G09G3/3406G09G3/3648G09G2310/08G09G2320/0247G09G2320/064G09G2360/16

Abstract

Claims (10)

1. A display apparatus comprising:

a display panel that includes a liquid-crystal panel and a backlight arranged behind the liquid-crystal panel; and

a controller that controls a luminance of the backlight and a transmittance ratio of the liquid-crystal panel,

wherein the controller is configured to:

when a refresh rate at which an image is displayed on the display panel in accordance with a video signal is switched, vary the luminance of the backlight such that a variation of a luminance of the display panel between before and after switching of the refresh rate falls within a predetermined range with respect to the video signal at a same grayscale;

vary the transmittance ratio of the liquid-crystal panel such that the variation of the luminance of the display panel falls within the predetermined range within a time duration that lasts from the switching of the refresh rate until the luminance of the backlight reaches a target value; and

restore the original transmittance ratio of the liquid-crystal panel after elapse of the time duration.

2. The display apparatus according to claim 1 , wherein the liquid-crystal panel includes a thin-film transistor substrate including a gate line, a source line and a pixel electrode, and

wherein varying the transmittance ratio of the liquid-crystal panel includes varying a length of an on-period of a gate voltage applied to the gate line.

3. The display apparatus according to claim 1 , wherein varying the transmittance ratio of the liquid-crystal panel includes varying a gamma value of the liquid-crystal panel.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (11)