Positioning structure for positioning optical film and frame and related backlight module and liquid crystal display

• US 8,832,979 B2
• Filed: 01/10/2013
• Issued: 09/16/2014
• Est. Priority Date: 01/06/2013
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Li, Quan
• Primary Examiner(s): Hoge, Gary
• Application Number:
  US13/811,924
• Publication Number:
  US 20140189982A1
• Time in Patent Office: 614 Days
• Field of Search: 405/46, 407/11, 349/58
• US Class Current: 40/546
• CPC Class Codes: A44B 99/00 Subject matter not provided for in other groups of this subclass
• CPC Class Codes: G02B 6/0011 the light guides being planar or of plate-like form
• CPC Class Codes: G02B 6/0085 Means for removing heat created by the light source from the package heat extraction or cooling elements for semiconductor light sources in general H01L33/64
• CPC Class Codes: G02B 6/0088 of the light guide or other optical sheets in the package
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G02F 2201/54 Arrangements for reducing warping-twist
• CPC Class Codes: H01F 7/0252 PM holding devices H01F7/021, H01F7/0215, H01F7/0226 take precedence
• CPC Class Codes: Y10T 24/32 having magnetic fastener

Abstract

The present invention discloses a backlight module and an LCD having a positioning structure for fixing an optical film and a frame. The frame includes a side frame having an assembling hole. The optical film is placed on the side frame and includes a protruded ear having a positioning hole. The positioning structure includes: a magnetic member installed inside the assembling hole; an attracted member including a compression part and a positioning pillar, wherein the positioning pillar is connected to the compression part and gets inside the assembling hole through the positioning hole such that the positioning pillar is connected to an attraction hole due to a magnetic effect to make the compression part compress and fix the optical film on the side frame. The positioning structure can fix the optical film in X, Y, and Z directions to raise the positioning reliability, assembling speed, and capacity.

Claims

1. A positioning structure for fixing an optical film and a plastic frame, the plastic frame comprising a side frame having an assembling hole, the optical film placed on the side frame and comprising a protruded ear, the protruded ear having a positioning hole, the positioning structure comprising:

a magnetic member, installed inside the assembling hole; and

an attracted member, comprising a compression part and a positioning pillar, wherein the positioning pillar is connected to a lower surface of the compression part and gets inside the assembling hole through the positioning hole such that the positioning pillar is connected to an attraction hole of the magnetic member due to a magnetic effect to make the compression part compress and fix the optical film on the side frame.

2. The positioning structure of claim 1, wherein the positioning pillar and the compression part are monolithic.

3. The positioning structure of claim 1, wherein the positioning pillar and the compression part are manufactured by a magnetic metal.

4. The positioning structure of claim 1, wherein a buffer layer is installed on an upper surface of the compression part, and the buffer layer is manufactured by a silica gel.

5. The positioning structure of claim 1, wherein the magnetic member is connected to a lower surface of the positioning hole by sticky glue, and the sticky glue is acrylic resin.

6. The positioning structure of claim 1, wherein the magnetic member is a magnet.

7. A backlight module, comprising:

a back frame;

a light guiding plate, installed in the back frame;

a plastic frame, comprising a side frame having an assembling hole, the plastic frame placed on the light guiding plate;

a magnetic member, installed inside the assembling hole;

an optical film, placing on the side frame and comprising a protruded ear, the protruded ear having a positioning hole; and

an attracted member, comprising a compression part and a positioning pillar, wherein the positioning pillar is connected to a lower surface of the compression part and gets inside the assembling hole through the positioning hole such that the positioning pillar is connected to an attraction hole of the magnetic member due to a magnetic effect to make the compression part compress and fix the optical film on the side frame.

8. The backlight module of claim 7, wherein the positioning pillar and the compression part are monolithic.

9. The backlight module of claim 7, wherein the positioning pillar and the compression part are manufactured by a magnetic metal.

10. The backlight module of claim 7, wherein a buffer layer is installed on an upper surface of the compression part, and the buffer layer is manufactured by a silica gel.

11. The backlight module of claim 7, wherein the magnetic member is connected to a lower surface of the positioning hole by sticky glue, and the sticky glue is acrylic resin.

12. The backlight module of claim 7, wherein the magnetic member is a magnet.

13. A liquid crystal display, comprising:

a backlight module, a display panel placed on the backlight module, a bezel placed on the display panel, wherein the backlight module comprises;

a back frame;

a light guiding plate, installed in the back frame;

a plastic frame, comprising a side frame having an assembling hole, the plastic frame placed on the light guiding plate;

a magnetic member, installed inside the assembling hole;

an optical film, placing on the side frame and comprising a protruded ear, the protruded ear having a positioning hole; and

an attracted member, comprising a compression part and a positioning pillar, wherein the positioning pillar is connected to a lower surface of the compression part and gets inside the assembling hole through the positioning hole such that the positioning pillar is connected to an attraction hole of the magnetic member due to a magnetic effect to make the compression part compress and fix the optical film on the side frame.

14. The liquid crystal display of claim 13, wherein the positioning pillar and the compression part are monolithic.

15. The liquid crystal display of claim 13, wherein the positioning pillar and the compression part are manufactured by a magnetic metal.

16. The liquid crystal display of claim 13, wherein a buffer layer is installed on an upper surface of the compression part, and the buffer layer is manufactured by a silica gel.

17. The liquid crystal display of claim 13, wherein the magnetic member is connected to a lower surface of the positioning hole by sticky glue, and the sticky glue is acrylic resin.

18. The liquid crystal display of claim 13, wherein the magnetic member is a magnet.