Display device

• US 7,165,875 B2
• Filed: 07/20/2004
• Issued: 01/23/2007
• Est. Priority Date: 07/23/2003
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated), Hitachi Display Technologies Ltd (Japan Display Incorporated)
• Inventors: Katou, Masahiro, Ohtomo, Atsushi
• Primary Examiner(s): Alavi; Ali
• Assistant Examiner(s): Sawhney; Hargobind S.
• Application Number:
  US10/894,014
• Publication Number:
  US 20050036335A1
• Time in Patent Office: 917 Days
• Field of Search: 362/632, 362/633, 362/634
• US Class Current: 362/632
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133322 Mechanical guidance or alignment of LCD panel support components
• CPC Class Codes: G02F 1/133325 Assembling processes
• CPC Class Codes: G02F 1/133615 Edge-illuminating devices, i.e. illuminating from the side

Abstract

The present invention prevents a defective display attributed to a non-uniform gap between a display element and a backlight which is caused by a phenomenon that an inner wall of a mold casing is shaved off by an end periphery of the display element and a shaved-off debris remains between the casing and the display element. Guide projections are integrally formed on an inner wall of a picture-frame-like portion of the mold casing and, at the same time, a gap which accommodates the shaved-off debris is formed between the guide projection and a bottom portion of the mold casing.

Claims

1. A display device comprising a substrate type display element integrally inserted, housed and held in a frame-like casing made of a material softer than a material of substrates which constitute the display element, wherein

the casing includes a picture-frame-like portion which forms an opening in a front surface side thereof for inserting the display element therein and surrounds a periphery of the display element, and a bottom portion which is integrally formed with the picture-frame-like portion at at least a portion of a back surface of the casing opposite to the front surface side,

a guide projection which extends in the bottom-portion direction from the front surface side is formed on an inner wall of a side of the picture-frame-like portion which is brought into contact with an outer periphery of the substrate which constitutes the display element,

the guide projection is shaped as a semi-circular column, and

a bottom-portion-side end portion of the guide projection terminates so as to form a gap between the guide projection and the bottom-portion of the casing.

2. A display device according to claim 1, wherein the gap which is formed at the bottom-portion-side end portion of the guide projection is provided for accommodating a shaved-off debris which is shaved off due to the abrasion between an outer periphery of the substrate which constitutes the display element and the guide projection when the display element is inserted between the picture-frame-like portion and the bottom portion.

3. A display device according to claim 1, wherein the guide projections are formed on the inner walls of two opposing sides of the picture-game-like portion.

4. A display device according to claim 2, wherein the guide projections are formed on the inner walls of two opposing sides of the picture-frame-like portion.

5. A display device according to claim 1, wherein the display element is a liquid crystal display element which uses a glass plate as a substrate material and the mold casing is a molded product member made of a resin material.

6. A display device according to claim 2, wherein the display element is a liquid crystal display element which uses a glass plate as a substrate material and the mold casing is a molded product member made of a resin material.

7. A display device according to claim 3, wherein the display element is a liquid crystal display element which uses a glass plate as a substrate material and the mold casing is a molded product member made of a resin material.

8. A display device according to claim 4, wherein the display element is a liquid crystal display element which uses a glass plate as a substrate material and the mold casing is a molded product member made of a resin material.

9. A display device comprising a panel type display element integrally inserted, housed and held in a frame-like casing made of a material softer than a material of substrates which constitute the display element, wherein

the casing includes a picture-frame-like portion which forms an opening in a front surface side thereof for inserting the display element therein and surrounds a periphery of the display element, and a bottom portion which is integrally formed with the picture-frame-like portion at at least a portion of a back surface of the casing opposite to the front surface side for inserting the display element,

a guide projection which extends in the bottom-portion direction from the front surface side is formed on an inner wall of a side of the picture-frame-like portion which is brought into contact with an outer periphery of the substrate which constitutes the display element, and

an opening which penetrates the casing and communicates with the outside of the casing is formed in the vicinity of a bottom-portion-side end portion of the guide projection.

10. A display device according to claim 9, wherein the guide projections are formed on the inner walls of two opposing sides of the picture-frame-like portion.

11. A display device according to claim 10, wherein the display element is a liquid crystal display element which uses a glass plate as said substrate material and the mold casing is a molded product member made of a resin material.

12. A display device according to claim 9, wherein the display element is a liquid crystal display element which uses a glass plate as said substrate material and the mold casing is a molded product member made of a resin material.

13. A display device comprising a panel type display element integrally inserted, housed and held in a frame-like casing made of a material softer than a material of substrates which constitute the display element, wherein

the casing includes a picture-frame-like portion which forms an opening in a front surface side thereof for inserting the display element therein and surrounds a periphery of the display element, and a bottom portion which is integrally formed with the picture-frame-like portion at at least a portion of a back surface of the casing opposite to the front surface side for inserting the display element,

a guide projection which extends in the bottom-portion direction from the front surface side is formed on an inner wall of a side of the picture-frame-like portion which is brought into contact with an outer periphery of the substrate which constitutes the display element, and

a recess which extends toward the inside of the casing is formed in the vicinity of a bottom-portion-side end portion of the guide projection.

14. A display device according to claim 13, wherein the guide projections are formed on the inner walls of two opposing sides of the picture-frame-like portion.

15. A display device according to claim 14, wherein the display element is a liquid crystal display element which uses a glass plate as said substrate material and the mold casing is a molded product member made of a resin material.

16. A display device according to claim 13, wherein the display element is a liquid crystal display element which uses a glass plate as said substrate material and the mold casing is a molded product member made of a resin material.