Backlight device and display apparatus

• US 20080225197A1
• Filed: 09/20/2007
• Published: 09/18/2008
• Est. Priority Date: 09/22/2006
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Maruyama, Naoki, Shibata, Hirokazu
• Granted Patent: US 7,724,316 B2
• Time in Patent Office: Days
• US Class Current: 349/58
• 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 1/133603 with LEDs
• CPC Class Codes: G02F 1/133606 including a specially adapted diffusing, scattering or light controlling members
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G02F 2201/465 Snap -fit
• CPC Class Codes: G02F 2201/54 Arrangements for reducing warping-twist

Abstract

A backlight device includes a light source; supporting means having four edges arranged in a frame-like manner; at least one optical sheet supported by the supporting means and allowing light emitted from the light source to pass therethrough and be incident on a back surface of a liquid crystal panel, the optical sheet having an opening in a position substantially dividing a length of a bottom edge thereof into halves; and a vibration-proof member extending through the opening and fixed to the supporting means.

Claims

1. A backlight device comprising:

a light source;

supporting means having four edges arranged in a frame-like manner;

at least one optical sheet supported by the supporting means and allowing light emitted from the light source to pass therethrough and be incident on a back surface of a liquid crystal panel, the optical sheet having an opening in a position substantially dividing a length of a bottom edge thereof into halves; and

a vibration-proof member extending through the opening and fixed to the supporting means.

2. The backlight device according to claim 1, wherein a position and a diameter of the opening provided in the optical sheet are determined so that a distance between the bottom edge of the optical sheet and the opening is set so as to provide a predetermined strength, and so that the opening is positioned behind the supporting means.

3. The backlight device according to claim 2, wherein the vibration-proof member includes a removable pin that is fitted through a pin-fixing opening provided in the supporting means and fixed thereto.

4. The backlight device according to claim 2, wherein the vibration-proof member includes a pin that is formed integrally with the supporting means in a projecting manner.

5. The backlight device according to claim 1, further comprising a diffusing member disposed so as to be stacked on a back surface of the optical sheet with bottom edges of the diffusing member and the optical sheet being aligned with each other, the diffusing member having a notch in a position corresponding to the opening in the optical sheet.

6. A display apparatus comprising:

a display panel;

at least one optical sheet, the optical sheet having an opening in a position substantially dividing a length of a bottom edge thereof into halves;

frame-like supporting means for supporting four edges of the optical sheet; and

a vibration-proof member extending through the opening and fixed to the supporting means.

7. The display apparatus according to claim 6, wherein a position and a diameter of the opening provided in the optical sheet are determined so that a distance between the bottom edge of the optical sheet and the opening is set so as to provide a predetermined strength, and so that the opening is positioned behind the supporting means.

8. The display apparatus according to claim 7, wherein the vibration-proof member includes a removable pin that is fitted through a pin-fixing opening provided in the supporting means and fixed thereto.

9. The display apparatus according to claim 7, wherein the vibration-proof member includes a pin that is formed integrally with the supporting means in a projecting manner.

10. The display apparatus according to claim 6, further comprising a diffusing member disposed so as to be stacked on a back surface of the optical sheet with bottom edges of the diffusing member and the optical sheet being aligned with each other, the diffusing member having a notch in a position corresponding to the opening in the optical sheet.

11. A backlight device comprising:

a light source;

a supporting member having four edges arranged in a frame-like manner;

at least one optical sheet supported by the supporting member and allowing light emitted from the light source to pass therethrough and be incident on a back surface of a liquid crystal panel, the optical sheet having an opening in a position substantially dividing a length of a bottom edge thereof into halves; and

a vibration-proof member passing through the opening and fixed to the supporting member.

12. The backlight device according to claim 11, wherein a position and a diameter of the opening provided in the optical sheet are determined so that a distance between the bottom edge of the optical sheet and the opening is set so as to provide a predetermined strength, and so that the opening is positioned behind the supporting member.

13. The backlight device according to claim 12, wherein the vibration-proof member includes a removable pin that is fitted through a pin-fixing opening provided in the supporting member and fixed thereto.

14. The backlight device according to claim 12, wherein the vibration-proof member includes a pin that is formed integrally with the supporting member in a projecting manner.

15. The backlight device according to claim 11, further comprising a diffusing member disposed so as to be stacked on a back surface of the optical sheet with bottom edges of the diffusing member and the optical sheet being aligned with each other, the diffusing member having a notch in a position corresponding to the opening in the optical sheet.

16. A display apparatus comprising:

a display panel;

at least one optical sheet, the optical sheet having an opening in a position substantially dividing a length of a bottom edge thereof into halves;

a frame-like supporting member for supporting four edges of the optical sheet; and

a vibration-proof member extending through the opening and fixed to the supporting member.

17. The display apparatus according to claim 16, wherein a position and a diameter of the opening provided in the optical sheet are determined so that a distance between the bottom edge of the optical sheet and the opening is set so as to provide a predetermined strength, and so that the opening is positioned behind the supporting member.

18. The display apparatus according to claim 17, wherein the vibration-proof member includes a removable pin that is fitted through a pin-fixing opening provided in the supporting member and fixed thereto.

19. The display apparatus according to claim 17, wherein the vibration-proof member includes a pin that is formed integrally with the supporting member in a projecting manner.

20. The display apparatus according to claim 16, further comprising a diffusing member disposed so as to be stacked on a back surface of the optical sheet with bottom edges of the diffusing member and the optical sheet being aligned with each other, the diffusing member having a notch in a position corresponding to the opening in the optical sheet.