IP Library Granted Patent US 8,816,997
Granted Patent B2
US 8,816,997 · App. 12/717,975 · Granted Aug 26, 2014

Image display device

Inventors: Naoki Tokuda (Mobara, JP); Atsushi Hasegawa (Togane, JP)
Assignees: Japan Display Inc.; Canon Kabushiki Kaisha
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Quick Facts
Patent No.
US 8,816,997
App. No.
12/717,975
Granted
Aug 26, 2014
Kind
B2
Abstract

Provided is an image display device for displaying an image by causing a light emitting element to emit light, the light emitting element being disposed in each of a plurality of pixel areas which are defined by dividing a display area into a grid pattern, the image display device including a pixel circuit for controlling light emission of the light emitting element disposed in each of the plurality of pixel areas, the pixel circuit being formed in an area having a portion that protrudes from the pixel area of the pixel circuit toward an adjacent pixel area and a portion where an adjacent pixel area protrudes into the pixel area.

Claims (20)

1. An image display device for displaying an image by causing a light emitting element to emit light, the light emitting element being disposed in each of a plurality of pixel areas which are defined by dividing a display area into a grid pattern,

the image display device comprising a pixel circuit for controlling light emission of the light emitting element disposed in each of the plurality of pixel areas, the pixel circuit being formed in an area having one portion that protrudes from the pixel area of the pixel circuit toward an adjacent pixel area and another portion where an adjacent pixel area protrudes into the pixel area,

wherein a first one of two adjacent pixel circuits sandwiching a power supply line, which supplies electric power for causing the light emitting element to emit light, has the one portion which protrudes directly underneath the power supply line toward the pixel area that is associated with a second one of the two adjacent pixel circuits, and the second pixel circuit has the another portion which protrudes directly underneath the power supply line toward the pixel area that is associated with the first pixel circuit; and

wherein at least the one portion that protrudes directly underneath the power supply line toward the adjacent pixel area includes a gate electrode of a thin film transistor that constitutes the pixel circuit.

2. The image display device according to claim 1 , wherein at least the one portion that protrudes directly underneath the power supply line toward the adjacent pixel area includes a margin portion for absorbing misalignment among layers that form the pixel circuit.

3. The image display device according to claim 1 ,

wherein the light emitting element includes an organic electroluminescence element, and

wherein the pixel circuit performs control to cause the organic electroluminescence element to emit light at a luminance corresponding to given luminance information.

4. The image display device according to claim 1 , wherein each of the one portion and the another portion of the two adjacent pixel circuits is the gate electrode of the thin film transistor of the respective pixel circuit.

5. The image display device according to claim 1 , wherein each of the one portion and the another portion of the two adjacent pixel circuits is a portion other than a capacitor or portion thereof of the two adjacent pixel circuits.

6. An image display device for displaying an image by causing a light emitting element to emit light, the light emitting element being disposed in each of a plurality of pixel areas which are defined by dividing a display area into a grid pattern,

the image display device comprising a pixel circuit for controlling light emission of the light emitting element disposed in each of the plurality of pixel areas, the pixel circuit being formed in an area having one portion that protrudes from the pixel area of the pixel circuit toward an adjacent pixel area and another portion where an adjacent pixel area protrudes into the pixel area,

wherein a first one of two adjacent pixel circuits sandwiching a power supply line, which supplies electric power for causing the light emitting element to emit light, has the one portion which protrudes directly underneath the power supply line toward the pixel area that is associated with a second one of the two adjacent pixel circuits, and the second pixel circuit has the another portion which protrudes directly underneath the power supply line toward the pixel area that is associated with the first pixel circuit; and

wherein at least the one portion that protrudes directly underneath the power supply line toward the adjacent pixel area is an area of a gate electrode of a thin film transistor which does not overlap with a semiconductor layer of the thin film transistor.

7. The image display device according to claim 6 , wherein at least the one portion that protrudes directly underneath the power supply line toward the adjacent pixel area includes a margin portion for absorbing misalignment among layers that form the pixel circuit.

8. The image display device according to claim 6 ,

wherein the light emitting element includes an organic electroluminescence element, and

wherein the pixel circuit performs control to cause the organic electroluminescence element to emit light at a luminance corresponding to given luminance information.

9. The image display device according to claim 6 , wherein each of the one portion and the another portion of the two adjacent pixel circuits is the area of the gate electrode of the thin film transistor of the respective pixel circuit. (The dependency in the original claim order is changed).

10. The image display device according to claim 6 , wherein each of the one portion and the another portion of the two adjacent pixel circuits is a portion other than a capacitor or portion thereof of the two adjacent pixel circuits.

Assignments (3)
CHANGE OF NAME Recorded Mar 25, 2014
From: HITACHI DISPLAYS, LTD.
To: JAPAN DISPLAY EAST, INC.
Reel/Frame 032514/0001 →
CHANGE OF NAME Recorded Mar 25, 2014
From: JAPAN DISPLAY EAST, INC.
To: JAPAN DISPLAY INC.
Reel/Frame 032514/0186 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Mar 5, 2010
From: TOKUDA, NAOKI; HASEGAWA, ATSUSHI
To: HITACHI DISPLAYS, LTD.; CANON KABUSHIKI KAISHA
Reel/Frame 024032/0749 →
Priority Claims (1)
JP 2009-056501 · Mar 10, 2009 · national
Continuity (1)
Related Publication 20100231615A1 · Sep 16, 2010