IP Library Granted Patent US 12,361,905
Granted Patent B2
US 12,361,905 · App. 18/742,041 · Granted Jul 15, 2025

Display device

Inventors: Hirofumi Ohira (Tokyo, JP); Koji Yoshida (Tokyo, JP)
Assignee: Japan Display Inc.
G09G3/367G09G2320/041G09G2320/0666G09G2320/0673
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Quick Facts
Patent No.
US 12,361,905
App. No.
18/742,041
Granted
Jul 15, 2025
Kind
B2
Abstract

According to an aspect, a display device includes: a display panel having a display region configured to output an image; a light source configured to emit light toward one surface side of the display panel; a liquid crystal panel interposed between the display panel and the light source and provided to be able to change a transmission degree of light between the display panel and the light source; a temperature detector configured to detect temperature of at least one of the display panel and the liquid crystal panel; and a controller configured to adjust color to be reproduced by the display panel in accordance with the temperature detected by the temperature detector.

Claims (17)

1. A display device comprising:

a display panel having a display region configured to output an image;

a light source configured to emit light toward one surface side of the display panel;

a liquid crystal panel interposed between the display panel and the light source and provided to be able to change a transmission degree of light between the display panel and the light source;

a temperature detector configured to detect temperature of at least one of the display panel and the liquid crystal panel; and

a controller configured to adjust color to be reproduced by the display panel in accordance with the temperature detected by the temperature detector, wherein

a state of the liquid crystal panel is not in operation is a first state,

a state of the liquid crystal panel is in operation is a second state,

the liquid crystal panel allows a difference between:

a transmission degree of light along a line tilted toward one side in a longitudinal direction of a rectangular shape of the display panel, with respect to a direction that the display panel and the light source face; and

a transmission degree of light along a line tilted toward the other side in the longitudinal direction of the rectangular shape, with respect to the direction, to be greater in the second state than the difference in the first state,

in the first state: a gamma curve with which redness is stronger and greenness is weaker is applied at low temperatures, and a gamma curve with which redness is weaker and greenness is stronger is applied at high temperatures, and

in the second state: a gamma curve with which redness and greenness are weaker is applied at low temperatures, and a gamma curve with which redness and greenness are stronger is applied at high temperatures.

2. The display device according to claim 1 , wherein the controller applies a gamma curve in accordance with the temperature to the display panel.

3. The display device according to claim 1 , wherein the temperature detector includes a variable resistor having an electric resistance value depending on temperature and configured to detect the temperature based on the electric resistance value of the variable resistor.

4. The display device according to claim 3 , wherein the variable resistor is provided in a frame region surrounding a display region provided at the at least one panel to allow transmission of the light from the light source.

5. The display device according to claim 3 , wherein the variable resistor has a light-transmitting property and is provided in a display region provided at the at least one panel to allow transmission of the light from the light source.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 2, 2025
From: JAPAN DISPLAY INC.
To: MAGNOLIA WHITE CORPORATION
Reel/Frame 071793/0491 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 17, 2024
From: OHIRA, HIROFUMI; YOSHIDA, KOJI
To: JAPAN DISPLAY INC.
Reel/Frame 067747/0158 →
Priority Claims (1)
JP 2023-100883 · Jun 20, 2023 · national
Continuity (1)
Related Publication 20240428749A1 · Dec 26, 2024
References Cited (4)
US 11804156B2 · Fujikawa · 2023 [cited by examiner]
US 20180240423A1 · Park · 2018 [cited by examiner]
US 20240334794A1 · Hai · 2024 [cited by examiner]
JP 2006195388A · 2006 [cited by applicant]