LIQUID CRYSTAL DISPLAY DEVICE AND ELECTRONIC EQUIPMENT HAVING THE SAME

• US 20120242926A1
• Filed: 03/29/2012
• Published: 09/27/2012
• Est. Priority Date: 11/22/2010
• Status: Active Grant

• Current Assignee: Wistron Corporation
• Original Assignee: Wistron Corporation
• Inventors: Hsu, Ching-Fu, Kao, Lien-Te, Lu, Chi-Yeh, Lin, Tzu-Wei, Pan, Ming-Hung, Lin, Ming-Chen, Lin, Min-Wei, Chen, Ting-Feng, Xia, Wan-Bing, Yen, Kai-Cheng, Zhang, Meng
• Granted Patent: US 8,786,799 B2
• Time in Patent Office: Days
• US Class Current: 349/58
• CPC Class Codes: G02B 6/0001 specially adapted for lighting devices or systems lighting or signalling on vehicles using light guides B60Q1/00; lighting devices for vehicle dashboards B60Q3/10; lighting devices for vehicle interior using light guides B60Q3/62; lighting devices mounted on the vehicle rear part using light guides F21S43/235; measuring arrangements having light conducting pointers G01D13/265; illumination of liquid crystal displays G02F1/1336; illuminated signs G09F13/00
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133314 Back frames
• CPC Class Codes: G02F 1/133317 Intermediate frames, e.g. between backlight housing and front frame
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means

Abstract

A liquid crystal display device includes a support frame having a bottom wall, and a main surrounding wall extending upwardly from and formed integrally as one piece with the bottom wall. The bottom wall and the surrounding wall cooperatively define a receiving space. The bottom wall includes a first support disposed in the receiving space. The main surrounding wall includes a second support disposed in the receiving space and spacedly above the first support. A backlight module is supported on the first support. A liquid crystal display panel is supported on the second support so that the liquid crystal display panel is positioned above the backlight module.

Claims

1. A liquid crystal display device comprising:

a support frame including a bottom wall, and a main surrounding wall extending upwardly from and formed integrally as one piece with said bottom wall, said bottom wall and said surrounding wall cooperatively defining a receiving space, said bottom wall including a first support disposed in said receiving space, said main surrounding wall including a second support disposed in said receiving space and spacedly above said first support;

a backlight module supported on said first support; and

a liquid crystal display panel supported on said second support so that said liquid crystal display panel is positioned above said backlight module.

2. The liquid crystal display device as claimed in claim 1, wherein each of said first support and said second support has a horizontal support face.

3. The liquid crystal display device as claimed in claim 2, wherein said backlight module includes a light guide plate having a lateral side, and a light-emitting unit disposed on said lateral side, said main surrounding wall being recessed to form a cavity that is spacedly below said second support, said light-emitting unit being disposed in said cavity.

4. The liquid crystal display device as claimed in claim 3, wherein said light guide plate further has a top side connected to a top end of said lateral side, said light-emitting unit including a flexible circuit board, and a light-emitting diode disposed on a bottom side of said flexible circuit board and corresponding in position to said lateral side of said light guide plate, said liquid crystal display device further comprising an adhesive piece adhered to and disposed between said top side of said light guide plate and said flexible circuit board.

5. The liquid crystal display device as claimed in claim 3, wherein said light guide plate further has a bottom side connected to a bottom end of said lateral side, said light-emitting unit including a flexible circuit board abutting against said first support, and a light-emitting diode disposed on a top side of said flexible circuit board and corresponding in position to said lateral side of said light guide plate, said liquid crystal display device further comprising an adhesive piece adhered to and disposed between said bottom side of said light guide plate and said flexible circuit board.

6. The liquid crystal display device as claimed in claim 3, wherein said support frame is made by injection molding a plastic material, said light-emitting unit including a flexible circuit board, and a light-emitting diode disposed on a top side of said flexible circuit board, said liquid crystal display device further comprising a metal frame disposed in said cavity and receiving clampingly said light-emitting unit and said light guide plate.

7. The liquid crystal display device as claimed in claim 6, wherein said metal frame is fixed to said support frame, and includes a vertical plate, a lower clamping plate extending horizontally and inwardly from a bottom end of said vertical plate, and an upper clamping plate extending horizontally and inwardly from a top end of said vertical plate, said lower clamping plate abutting against said first support and engaging a bottom side of said flexible circuit board, said upper clamping plate engaging a top end of said light-emitting diode and a top side of said light guide plate that is connected to a top end of said lateral side of said light guide plate so that said light-emitting diode is positioned at a location corresponding to said lateral side of said light guide plate.

8. The liquid crystal display device as claimed in claim 1, wherein said support frame is formed with an accommodation groove, said liquid crystal display device further comprising a control circuit board disposed in said accommodation groove, and a flexible transmission circuit connected electrically to said liquid crystal display panel and said control circuit board.

9. The liquid crystal display device as claimed in claim 8, wherein said bottom wall has a bottom face that is recessed to form said accommodation groove, said flexible transmission circuit being configured as a circuit band made by a chip on film (COF) technology, said flexible transmission circuit being bent downward and then inward extending around said support frame to connect with said control circuit board.

10. The liquid crystal display device as claimed in claim 1, wherein said main surrounding wall includes a left wall, a right wall, a front wall and a rear wall, said rear wall including a positioning structure to position said backlight module.

11. The liquid crystal display device as claimed in claim 10, wherein said positioning structure includes a positioning groove and a positioning stud provided in said positioning groove, said backlight module including an optical film layer that has a projection engaged to said positioning groove and formed with a positioning hole for extension of said positioning stud therethrough.

12. The liquid crystal display device as claimed in claim 2, further comprising at least one double-sided adhesive tape adhering said liquid crystal display panel to one side of said second support.

13. The liquid crystal display device as claimed in claim 12, wherein said main surrounding wall includes a retention portion projecting from the other side of said second support to retain said liquid crystal display panel thereon.

14. The liquid crystal display device as claimed in claim 12, wherein said double-sided adhesive tape includes a pull portion exposed partially from said liquid crystal display panel, and two double-sided adhesive portions adhered to two opposite sides of said pull portion, said double-sided adhesive portions being further adhered to said one side of said second support and said liquid crystal display panel, respectively.

15. The liquid crystal display device as claimed in claim 12, further comprising two said double-sided adhesive tapes to adhere said liquid crystal display panel to two opposite sides of said second support.

16. The liquid crystal display device as claimed in claim 2, wherein said main surrounding wall includes two retention portions projecting respectively from two opposite sides of said second support to retain said liquid crystal display panel thereon.

17. The liquid crystal display device as claimed in claim 1, further comprising an upper casing that covers a periphery of said liquid crystal display panel and that is formed with an opening to expose said liquid crystal display panel.

18. The liquid crystal display device as claimed in claim 17, wherein said support frame further includes an auxiliary surrounding wall extending upwardly from an outer periphery of said bottom wall and surrounding said main surrounding wall, said upper casing being connected to said auxiliary surrounding wall.

19. The liquid crystal display device as claimed in claim 17, wherein said support frame is made of a plastic material and includes two extension plates extending respectively from two opposite sides of said main surrounding wall, said liquid crystal display device further comprising a lower casing that is made of metal, that covers said support frame, and that is coupled to said upper casing, two coupling rods each disposed between said lower casing and a respective one of said extension plates, and two fasteners, each of said fasteners fixing one of said coupling rods and the respective said extension plate to said lower casing.

20. The liquid crystal display device as claimed in claim 17, wherein said upper casing includes a first coupling portion, said liquid crystal display panel further including a glass to cover said opening, said glass including a second coupling portion coupled to said first coupling portion.

21. The liquid crystal display device as claimed in claim 20, wherein said first coupling portion is an inner periphery of said upper casing and defines said opening, said second coupling portion being configured as an annular groove to receive engagingly said inner periphery.

22. The liquid crystal display device as claimed in claim 20, wherein said main surrounding wall further includes a third support spacedly above said second support and having a horizontal support face, said liquid crystal display device further comprising a touch control panel supported on said third support.

23. An electronic equipment having a liquid crystal display device comprising:

a lower casing defining a mounting space;

an electronic device disposed in said mounting space; and

a liquid crystal display device disposed in said mounting space and coupled electrically to said electronic device, said liquid crystal display device including

a support frame having a bottom wall, and a main surrounding wall extending upwardly from and formed integrally as one piece with said bottom wall, said bottom wall and said surrounding wall cooperatively defining a receiving space, said bottom wall including a first support disposed in said receiving space, said main surrounding wall including a second support disposed in said receiving space and spacedly above said first support, and a third support spacedly above said second support;

a backlight module supported on said first support; and

a liquid crystal display panel supported on said second support; and

a touch control panel supported on said third support.

24. The electronic equipment as claimed in claim 23, wherein each of said first, second and third supports has a horizontal support face.