CN101737684B

CN101737684B - Backlight module and light source device thereof

Info

Publication number: CN101737684B
Application number: CN2010100038918A
Authority: CN
Inventors: 郑川河; 黄国正
Original assignee: AU Optronics Corp
Current assignee: AUO Corp
Priority date: 2010-01-15
Filing date: 2010-01-15
Publication date: 2011-07-20
Anticipated expiration: 2030-01-15
Also published as: CN101737684A

Abstract

A light source device and a backlight module are provided, the backlight module comprises a frame, a light guide plate and a light source device. The light source device includes: a substrate; a plurality of light emitting elements on the substrate, emitting light toward the light guide plate; and the positioning component is positioned on the substrate and positioned at the side edges of the plurality of light-emitting components, and comprises a slot and a butting part, the slot is used for connecting the electronic component, and the butting part elastically butts against the light guide plate to position the light guide plate. The invention arranges the positioning component at the side of the luminous component, and the positioning component can elastically support the light guide plate to absorb the expansion amount of the heated light guide plate so as to achieve the purpose of positioning the light guide plate, can be used as a connector to connect with the electronic component, does not need to position the light guide plate by breaking holes and arranging tongue pieces, and effectively solves the problem of the existing structure caused by the broken holes of the frame.

Description

Backlight module and light supply apparatus thereof

Technical field

The present invention is a kind of backlight module, particularly a kind of backlight module and light supply apparatus thereof.

Background technology

Backlight module is one of key part and component of lcd products, has been widely used at present on the various electronic products such as personal digital assistant (PDA), digital camera, satellite navigation system and flat-surface television.Along with the LED terminal applies is also more and more, it is trend of the times certainly that the LED-backlit source replaces cathode fluorescent tube (C FL), wherein, the backlight of LED can be divided into direct-light type LED backlight module and side light type LED backlight module according to the position of light source.The direct-light type LED backlight module mainly with the LED uniform crystal particles be configured in liquid crystal panel the rear as light emitting source, make backlightly can evenly be communicated to whole front panel; Side light type LED backlight module mainly is configured in LED crystal grain four edges of panel, when LED is luminous, is transported to the zone of panel central authorities by LGP.Because side light type LED backlight module is located at the side of LGP with light source, is fit to be applied to undersized liquid crystal display product, therefore favored day by day.

The side light type LED backlight module of prior art is provided with LGP and a plurality of light emitting diode in the housing that metal material is made, wherein, a plurality of light emitting diodes are close proximity to LGP, the light that light emitting diode is penetrated directly enters LGP, and many song tongue pieces are set in housing inner edge place, use that LGP is positioned in the housing, guarantee stability of light source simultaneously.Yet this kind is very difficult to be applied to the LED-backlit module of four limit light inlets with the structure of tongue piece location LGP, in addition, housing not only causes light leakage phenomena easily because of flanging needs holes, and dust is fallen in the backlight module, influenced the quality of liquid crystal display product; Moreover the white reflection sheet need cooperate the shape fabricating construction of LGP and housing, makes its manufacturing cost significantly promote.

Therefore, the structure that how to improve side light type LED backlight module promotes the quality of product by this and reduces its cost to solve the orientation problem of LGP, for the inventor of this case and be engaged in the problem that those skilled in the art desires most ardently improvement.

Summary of the invention

In view of this, the present invention proposes a kind of light supply apparatus, and in order to provide light to the LGP with fixed part, light supply apparatus comprises: substrate, a plurality of luminescence component and positioning component.A plurality of luminescence components are positioned on the substrate, towards LGP emission light; Positioning component is positioned on the substrate and is positioned at the side of a plurality of luminescence components, corresponding fixed part setting, and positioning component comprises slot and support division, and slot is in order to connect electronic building brick, and support division flexibly supports LGP and locatees LGP.

The present invention also proposes a kind of backlight module, comprises: framework, LGP and light supply apparatus.LGP is positioned at framework, comprises fixed part; Light supply apparatus comprises between framework and LGP: substrate; A plurality of luminescence components are positioned on the substrate, towards LGP emission light; And positioning component, be positioned on the substrate and be positioned at the side of a plurality of luminescence components, corresponding fixed part setting, positioning component comprises slot and support division, and slot is in order to connect electronic building brick, and support division flexibly supports LGP and locatees LGP.

The present invention is provided with positioning component in the side of luminescence component, and flexibly support LGP with positioning component, use the swell increment after the absorption LGP is heated and firmly locate LGP in framework, effectively solve the problem that existing structure is produced because of the framework holes, and then connect electronic building brick with positioning component, for example connect power module and required electric power when the backlight module running can be provided.

Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.

Description of drawings

Fig. 1 is the schematic diagram of first embodiment of the invention backlight module;

Fig. 2 is the schematic diagram of first embodiment of the invention light supply apparatus;

Fig. 3 A is the schematic diagram () of first embodiment of the invention positioning component;

Fig. 3 B is the schematic diagram (two) of first embodiment of the invention positioning component;

Fig. 4 is the decomposing schematic representation of first embodiment of the invention positioning component;

Fig. 5 is the generalized section of first embodiment of the invention positioning component.

Fig. 6 A be the first embodiment of the invention positioning component schematic diagram () is set;

Fig. 6 B be the first embodiment of the invention positioning component schematic diagram (two) is set;

Fig. 7 is the schematic diagram of second embodiment of the invention backlight module.

Wherein, Reference numeral

1............ backlight module

2............ framework

4............ LGP

4a............ light inlet side

4b............ exiting surface

41............ fixed part

411........... reflecting surface

6............ light supply apparatus

61............ substrate

62............ luminescence component

64............ positioning component

640........... pedestal

6401........... limiting section

6402........... stopper section

641........... weld pad

642........... slot

643........... conducting terminal

645........... elastic parts

646........... support division

6461........... guidance part

The specific embodiment

Below in conjunction with the drawings and specific embodiments technical solution of the present invention being described in detail, further understanding purpose of the present invention, scheme and effect, but is not the restriction as claims protection domain of the present invention.

Fig. 1, Fig. 2, Fig. 3 A, Fig. 3 B, Fig. 4 and Fig. 5 illustrate the first embodiment of the present invention.

Backlight module 1 comprises: framework 2, LGP 4, light supply apparatus 6.

Framework 2 general rectangular ducted bodies preferably can be made by metal material, or be to make with plastic material or other suitable material.

LGP 4 general parallelogram bodies also are arranged in the framework 2, and it has light inlet side 4a and exiting surface 4b, and at this, exiting surface 4b is for can intersect at light inlet side 4a (as Fig. 6 A).In addition, LGP 4 is provided with the fixed part 41 that is inner concavity in its corner part or a side, and wherein, fixed part 41 can be groove, depression, but the present invention is non-as limit.Moreover the surface of fixed part 41 is a reflecting surface 411, and it can or attach reflector plate by the coating reflective coating and be formed.

Light supply apparatus 6 is arranged between framework 2 and the LGP 4, and it preferably can be made up of substrate 61, a plurality of luminescence component 62 and positioning component 64; Wherein, substrate 61 is laid with circuit, and at interval luminescence component 62 is set thereon, and luminescence component 62 can be towards the light inlet side 4a of LGP 4 emission light, and light can avoid light to be missed by fixed part 41 places via reflecting surface 411 reflections.The side of luminescence component 62 then is provided with positioning component 64, and at this, the fixed part 41 of positioning component 64 corresponding inner concavities is provided with and is inserted into LGP 4, preferably can be made up of pedestal 640, slot 642 and support division 646; Wherein, pedestal 640 is general rectangular ducted body, is provided with weld pad (pad) 641 (as Fig. 6 A and Fig. 6 B) in its outer surface, preferably can be on substrate 61 via surface mount technology (SMT) piece, or be welded on the substrate 61 with manual type; Slot 642 is arranged at the side on the pedestal 640, and conducting terminal 643 is set in slot 642, and an end of conducting terminal 643 can be connected in substrate 61, connects electronic building bricks (figure does not show) to utilize slot 642, for example connects power modules with slot 642 and required electric power when its running is provided; Support division 646 can be made by elastic material, and lives and to be arranged on the pedestal 640 with moving, in order to flexibly support the light inlet side 4a of LGP 4, can absorb the swell increment after LGP 4 is heated by this and locatees LGP 4 in framework 2.

In above stated specification, the surface of weld pad 641 place pedestals 640 preferably is and support division 646 parallel (as Fig. 6 A), or is weld pad 641 to be arranged at pedestal 640 surfaces (as Fig. 6 B) of intersecting with support division 646 according to actual demand.

At this, pedestal 640 is provided with limiting

section

6401, and 646 of support divisions are provided with corresponding guidance part 6461, locatees support division 646 and pedestal 640 with guidance part 6461 in conjunction with limiting section 6401, and makes support division 646 pedestal 640 displacements (as Fig. 5) relatively; In the present embodiment, limiting section 6401 is the elongate slot of hollow form, and guidance part 6461 is the convex body, and guidance part 6461 can embed in the limiting section 6401 and along limiting section 6401 displacements, and only only for giving an example, the present invention is non-as limit for aforementioned structure.Moreover, in the pedestal 640 elastic parts 645 can be set, in order to supporting support division 646, and elastic parts 645 can be spring or is made by the rubber-like elastomeric material.

After backlight module of the present invention 1 assembling was finished, elastic parts 645 supported support division 646, made support division 646 can support the light inlet side 4a of LGP 4 and located LGP 4.When luminescence component 62 is launched light towards the light inlet side 4a of LGP 4, LGP 4 is heated and expands, extruding support division 646 and compressing elastic parts 645 strains and shrinking are used the positioning states that absorbs the swell increment after LGP 4 is heated and can keep LGP 4; And luminescence component 62 is not when luminous, and LGP 4 reverts to the state before the expanded by heating, and therefore, elastic parts 645 elasticity are recovered and promoted support division 646 and support LGP 4.

Fig. 7 illustrates the second embodiment of the present invention.Present embodiment and last embodiment difference are the structure of pedestal 640; In the present embodiment, the side of pedestal 640 is extended with stopper section 6402, whole sight, pedestal 640 generally is L font shape; Wherein, positioning component 64 supports the light inlet side 4a of LGP 4 with support division 646 on first direction, support LGP 4 with stopper section 6402 on second direction, reaches LGP 4 all can reach the location on first direction and second direction effect.At this, first direction intersects at second direction.

The present invention is provided with positioning component in the side of luminescence component, and positioning component can flexibly support LGP, use the purpose that absorbs the swell increment after LGP is heated and reach the location LGP, and can be used as connector and connect electronic building brick, for example connect power module and required electric power when the backlight module running can be provided; Therefore, the present invention does not need with holes and the tongue piece mode is set to locate LGP, effectively solves the problem that existing structure is produced because of the framework holes.

Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.

Claims

1. A light source device for providing light to a light guide plate with a fixed portion, characterized in that the light source device comprises:

a substrate;

A plurality of light-emitting components are located on the substrate and emit light toward the light guide plate; and

A positioning component is located on the substrate and on the side of the light-emitting components, including a base, a slot and a supporting part, the base is used to set the slot and the supporting part, and the slot is used for To connect an electronic component, the resisting portion elastically resists the light guide plate to position the light guide plate, and the resisting portion is movably arranged on the base body;

Wherein, the seat body includes a limiting portion, and the abutting portion includes a guiding portion, and the abutting portion and the seat body are positioned in combination with the limiting portion and the guiding portion, so that the abutting portion can be opposite to the Seat displacement.

2. The light source device as claimed in claim 1, wherein the positioning component comprises a soldering pad, which is soldered and fixed on the substrate.

3. The light source device according to claim 2, wherein the positioning component is mounted on the substrate by surface-mounting technology.

4 . The light source device according to claim 1 , wherein the positioning component further comprises an elastic component located in the seat for abutting against the resisting portion.

5. The light source device as claimed in claim 4, wherein the elastic component is a spring.

6. The light source device according to claim 4, wherein the elastic component is made of elastic rubber material.

7. The light source device as claimed in claim 1, wherein the positioning component further comprises a conductive terminal located in the slot.

8. The light source device according to claim 7, wherein one end of the conductive terminal is connected to the substrate.

9. A backlight module, characterized in that it comprises:

a frame;

a light guide plate, located in the frame, including a fixing part; and

A light source device, located between the frame and the light guide plate, includes:

a substrate;

A positioning component is located on the substrate and on the side of the light-emitting components, and is arranged corresponding to the fixing part. The positioning component includes a base, a slot and a resisting part. The base is used to set the slot and The resisting portion, the slot is used to connect an electronic component, the resisting portion elastically resists the light guide plate to position the light guide plate, and the resisting portion is movably arranged on the base body;

Wherein, the seat body includes a limiting portion, and the abutting portion includes a guiding portion, and the abutting portion and the seat body are positioned in combination with the limiting portion and the guiding portion, so that the abutting portion can be relatively The base is displaced.

10. The backlight module as claimed in claim 9, wherein the positioning component comprises a welding pad, which is soldered and fixed on the substrate.

11. The backlight module as claimed in claim 10, wherein the positioning component is mounted on the substrate by surface mount technology.

12 . The backlight module as claimed in claim 9 , wherein the positioning component further comprises an elastic component located in the seat and used for abutting against the resisting portion. 13 .

13. The backlight module as claimed in claim 12, wherein the elastic component is a spring.

14. The backlight module as claimed in claim 12, wherein the elastic component is made of elastic rubber material.

15. The backlight module as claimed in claim 9, wherein the positioning component further comprises a conductive terminal located in the slot.

16. The backlight module as claimed in claim 15, wherein one end of the conductive terminal is connected to the substrate.

17. The backlight module as claimed in claim 9, wherein the light guide plate further comprises a reflective surface located on a surface of the fixing portion.