LIQUID CRYSTAL DISPLAY DEVICE

• US 20090073358A1
• Filed: 02/19/2007
• Published: 03/19/2009
• Est. Priority Date: 03/17/2006
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Yamada, Junichi, Taguchi, Tokio, Nakajima, Mutsumi, Yoshida, Keisuke, Tsuda, Kazuhiko
• Granted Patent: US 7,880,834 B2
• Time in Patent Office: Days
• US Class Current: 349/109
• CPC Class Codes: G02F 1/133555 Transflectors
• CPC Class Codes: G02F 2201/52 RGB geometrical arrangements

Abstract

Realizes a structure for a transreflective liquid crystal display device in which one pixel is defined by four or more picture elements, the structure providing a high aperture ratio and being suitable for display for which the transmission mode is prioritized.

A liquid crystal display device according to the present invention is a transreflective liquid crystal display device, comprising a plurality of picture elements including a first picture element, a second picture element, a third picture element and a fourth picture element for displaying different colors from one another; in which each of the plurality of picture elements includes a transmission area for providing display in a transmission mode and a reflection area for providing display in a reflection mode. Each picture element includes a mesh portion shaped to be meshable with an adjacent picture element; and the reflection area of each picture element is located in the mesh portion.

Claims

1. A liquid crystal display device, comprising:

a plurality of picture elements including a first picture element, a second picture element, a third picture element and a fourth picture element for displaying different colors from one another;

wherein;

each of the plurality of picture elements includes a transmission area for providing display in a transmission mode and a reflection area for providing display in a reflection mode;

each of the plurality of picture elements includes a mesh portion shaped to be meshable with an adjacent picture element; and

the reflection area of each of the plurality of picture elements is located in the mesh portion.

2. The liquid crystal display device of claim 1, wherein the plurality of picture elements are each L-shaped.

3. The liquid crystal display device of claim 1, wherein:

the plurality of picture elements define a plurality of pixels each including the first picture element, the second picture element, the third picture element and the fourth picture element; and

the mesh portion of each of the plurality of picture elements meshes with a picture element belonging to the same pixel.

4. The liquid crystal display device of claim 1, wherein:

the plurality of picture elements define a plurality of pixels each including the first picture element, the second picture element, the third picture element and the fourth picture element; and

the mesh portion of each of the plurality of picture elements meshes with a picture element belonging to a different pixel.

5. The liquid crystal display device of claim 1, wherein the first picture element is a red picture element for displaying red, the second picture element is a green picture element for displaying green, and the third picture element is a blue picture element for displaying blue.

6. The liquid crystal display device of claim 5, wherein the fourth picture element is a white picture element for displaying white.

7. The liquid crystal display device of claim 1, wherein:

among the first picture element, the second picture element, the third picture element and the fourth picture element, two picture elements display colors in a complementary relationship to each other; and

the mesh portions of the two picture elements mesh with each other.

8. The liquid crystal display device of claim 5, wherein the fourth picture element is a yellow picture element for displaying yellow.

9. The liquid crystal display device of claim 8, wherein the mesh portion of the blue picture element and the mesh portion of the yellow picture element mesh with each other.

10. The liquid crystal display device of claim 9, wherein the reflection area of the blue picture element has a larger area size than an area size of the reflection area of the yellow picture element.

11. The liquid crystal display device of claim 8, wherein the red picture element, the green picture element, the blue picture element and the yellow picture element are arranged in a matrix of 2 rows and 2 columns;

and

the mesh portion of the red picture element, the mesh portion of the green picture element, the mesh portion of the blue picture element and the mesh portion of the yellow picture element are arranged to be continuous like a strip in a row direction.

12. The liquid crystal display device of claim 11, wherein the mesh portions arranged to be continuous like a strip are continues in the order of the mesh portion of the red picture element, the mesh portion of the green picture element, the mesh portion of the blue picture element and the mesh portion of the yellow picture element;

or in the order of the mesh portion of the green picture element, the mesh portion of the red picture element, the mesh portion of the yellow picture element and the mesh portion of the blue picture element.

13. The liquid crystal display device of claim 11, wherein the mesh portions arranged to be continuous like a strip are continues in the order of the mesh portion of the red picture element, the mesh portion of the green picture element, the mesh portion of the yellow picture element and the mesh portion of the blue picture element.

14. The liquid crystal display device of claim 1, wherein:

the liquid crystal display device includes an active matrix substrate including a switching element provided for each of the plurality of picture elements; and

the switching element is located in the reflection area of each of the plurality of picture elements.