Display device, backlight module and mainframe structure unit thereof

• US 8,970,802 B2
• Filed: 06/08/2012
• Issued: 03/03/2015
• Est. Priority Date: 05/30/2012
• 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: Cheng, Jiahe
• Primary Examiner(s): CHEN, WEN YING PATTY
• Application Number:
  US13/579,565
• Publication Number:
  US 20130321739A1
• Time in Patent Office: 998 Days
• Field of Search: 349/58
• US Class Current: 349/58
• CPC Class Codes: G02F 1/133317 Intermediate frames, e.g. between backlight housing and front frame
• CPC Class Codes: G02F 1/133322 Mechanical guidance or alignment of LCD panel support components
• CPC Class Codes: G02F 1/133608 including particular frames or supporting means
• CPC Class Codes: G09F 13/04 Signs, boards or panels, illuminated from behind the insignia

Abstract

The present invention discloses a display device which is configured with a liquid crystal display panel and a backlight module. The backlight module includes at least an optical film and a mainframe structure which includes a plastic frame and a backboard integrally with the plastic frame. The backboard includes an integral bottom to support the optical films of the backlight module, and a first sidewall. Wherein the plastic frame is integrally formed with a carrying portion, a second sidewall, and a supporting portion, wherein the carrying portion is used to position optical films, and also support the liquid crystal display panel, wherein to receiving slot is defined between the second sidewall and the supporting main portion such that the first sidewall is received therein, wherein the supporting portion includes an integrally formed main portion interconnected to the carrying portion and a positioning block which prevent the plastic frame from transversal movement with respect to the backboard together with the bottom of the backboard. The present invention readily increases the stability and firmness of the plastic frame.

Claims

1. A mainframe structure used for backlight module configured with a plastic frame and a backboard, wherein:

the backboard includes an integral bottom for supporting optical films of the backlight module, and a first sidewall;

wherein the plastic frame is integrally formed with a carrying portion, a second sidewall, and a supporting portion, wherein the carrying portion is used for positioning optical films, and also supporting the liquid crystal display panel, wherein a receiving slot is defined between the second sidewall and the supporting main portion such that the first sidewall is received therein, wherein the supporting portion includes an integrally formed main portion interconnected to the carrying portion and a positioning block which prevent the plastic frame from transversal movement with respect to the backboard together with the bottom of the backboard;

wherein the bottom of the backboard is defined with opening in which the positioning block is received therein, wherein the supporting main portion abuts against the bottom of the mainboard so as to limit a distance of the carrying portion to the bottom of the mainboard;

wherein the opening is embodied as a circular hole or a polygonal hole, wherein the corresponding positioning block is a cylindrical column or polygonal column; and

wherein the opening passing through the bottom of the mainboard.

2. The mainframe structure as recited in claim 1, wherein the first sidewall is provided with a fastener retaining the first sidewall within the receiving slot defined by the second sidewall and the supporting main portion.

3. The mainframe as recited in claim 1, wherein the receiving slot is provided with a retainer interengaged with a fastener of the first sidewall, wherein the engagement between the receiving slot and the fastener keeps the first sidewall remained within the receiving slot.

4. The mainframe structure as recited in claim 2, wherein the fastener is an embossment.

5. The mainframe structure as recited in claim 3, wherein the fastener is an embossment.

6. The mainframe structure as recited in claim 1, wherein the carrying portion, the second sidewall and the supporting portion jointly define an “

F-shaped”

configuration view from side.

7. A backlight module which is configured with at least an optical film, and a mainframe structure, wherein the mainframe structure includes a plastic frame and a mainboard incorporating with the plastic frame, wherein:

a backboard includes an integral bottom for supporting optical films of the backlight module, and a first sidewall;

wherein the plastic frame is integrally formed with a carrying portion, a second sidewall, and a supporting portion, wherein the carrying portion is used for positioning optical films, and also supporting the liquid crystal display panel, wherein a receiving slot is defined between the second sidewall and the supporting main portion such that the first sidewall is received therein, wherein the supporting portion includes an integrally formed main portion interconnected to the carrying portion and a positioning block which prevent the plastic frame from transversal movement with respect to the backboard together with the bottom of the backboard;

wherein the bottom of the backboard is defined with opening in which the positioning block is received therein, wherein the supporting main portion abuts against the bottom of the mainboard so as to limit a distance of the carrying portion to the bottom of the mainboard; and

wherein the opening passing through the bottom of the mainboard.

8. The backlight module as recited in claim 7, wherein the first sidewall is provided with a fastener retaining the first sidewall within the receiving slot defined by the second sidewall and the supporting main portion.

9. The mainframe structure as recited in claim 8, wherein the fastener is an embossment.

10. A display device which is configured with a liquid crystal display panel and a backlight module, the backlight module including at least an optical film and a mainframe structure which includes a plastic frame and a backboard integrally with the plastic frame:

the backboard includes an integral bottom to support the optical films of the backlight module, and a first sidewall;

wherein the plastic frame is integrally formed with a carrying portion, a second sidewall, and a supporting portion, wherein the carrying portion is used to position optical films, and also support the liquid crystal display panel, wherein a receiving slot is defined between the second sidewall and the supporting main portion such that the first sidewall is received therein, wherein the supporting portion includes an integrally formed main portion interconnected to the carrying portion and a positioning block which prevent the plastic frame from transversal movement with respect to the backboard together with the bottom of the backboard; and

wherein the receiving slot is provided with a retainer interengaged with a fastener of the first sidewall, wherein the engagement between the receiving slot and the fastener keeps the first sidewall remained within the receiving slot.

11. The displaying device as recited in claim 10, wherein the bottom of the backboard is defined with opening in which the positioning block is received therein, wherein the supporting main portion abuts against the bottom of the mainboard so as to limit a distance of the carrying portion to the bottom of the mainboard.

12. The display device as recited in claim 11, wherein the fastener is an embossment.