CN1307477C

CN1307477C - Direct type backlight assembly

Info

Publication number: CN1307477C
Application number: CNB031584217A
Authority: CN
Inventors: 吴志刚
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2003-09-09
Filing date: 2003-09-09
Publication date: 2007-03-28
Anticipated expiration: 2023-09-09
Also published as: CN1595257A

Abstract

The present invention relates to a direct-down back light assembly which comprises a reflection seat, buffer blocks, a light tube and cover caps, wherein the reflection seat is provided with a pair of air vents which penetrate two side edges of the reflection seat; the buffer blocks are arranged on the reflection seat and are opposite to the air vents; the light tube is provided with electrode ends which are sheathed in the buffer blocks; the cover caps are used for covering the buffer blocks, and the inner surface of each cover cap respectively forms a gas flow passage with the air vent.

Description

Direct type backlight assembly

Technical field

The present invention relates to a kind of backlight assembly, particularly a kind of direct type backlight assembly that is used in the membrane transistor LCD.

Prior art

(back light unit BLU) for making a general reference the optical module that a back side light source of product can be provided, can be used on various information, communication, the consumer products backlight assembly.In recent years, because Thin Film Transistor-LCD (thin film transistor-liquid crystal dusplay, TFT-LCD) flourish, backlight assembly also just are combined in this cross-centennial vision product of TFT-LCD tightly, become its indispensable part.

Generally speaking, backlight assembly can be divided into two kinds of side-light type and straight-down negatives according to the position at light source place.Side-light type is that light source is placed the backlight assembly side, with being intended to reduce the thickness of backlight assembly, so be used in the display such as portable electronic products such as mobile phone, PDA more.Straight-down negative then is that light source is arranged at backlight assembly below, is to make TFT-LCD to have the bigger intensity of light source, so to be used for similarly be that desktop computer and LCD TV etc. need in the display of higher brightness more.

Please refer to Fig. 1, represent the synoptic diagram of traditional direct type backlight assembly.Traditional direct type backlight assembly 100 includes reflection seat 110, fluorescent tube 120 and fluorescent tube carriage 130.

Fluorescent tube 120 is in order to the light source as direct type backlight assembly 100, and reflection seat 110 is the light beam in order to being launched by fluorescent tube 120 then, evenly reflexes on the TFT-LCD panel.

The combination of fluorescent tube 120 and reflection seat 110 realizes by fluorescent tube carriage 130 and the bump rubber (not showing among the figure) that is disposed at fluorescent tube carriage 130 inboards.That is bump rubber is the inboard that is tight with at fluorescent tube carriage 130, and fluorescent tube 120 is socketed in the bump rubber by its electrode tip (tail end of fluorescent tube 120), realizes combining of fluorescent tube 120 and fluorescent tube carriage 130 earlier.At last, fluorescent tube carriage 130 makes up with reflection seat 110 again, and fluorescent tube 120 can be coupled on the reflection seat 110.

In above-mentioned traditional direct type backlight assembly 100, bump rubber is except being the poor conductor of heat, and coated by fluorescent tube carriage 130.Therefore, very easily cause the heat that electrode tip discharged of fluorescent tube 120 effectively to be discharged.Heat accumulation improves the temperature of direct type backlight assembly 100 in direct type backlight assembly 100, and then influences the briliancy performance of direct type backlight assembly 100.

Summary of the invention

In view of this, the purpose of this invention is to provide a kind of direct type backlight assembly, make the used heat that electrode tip discharged of fluorescent tube, can not accumulate in the assembly, can effectively be expelled to outside the assembly, make the briliancy performance of direct type backlight assembly better.

According to above-mentioned purpose, the present invention proposes a kind of direct type backlight assembly, includes reflection seat, buffer stopper, fluorescent tube and cover cap.Form a pair of ventilating opening that runs through the reflection seat dual side-edge on the reflection seat.Buffer stopper then is arranged on the reflection seat, and this buffer stopper is relative with ventilating opening.Fluorescent tube has two electrode tips, and this two electrode tip is socketed in the buffer stopper.Cover cap is in order to the housing buffer stopper, and cover cap inner face and gas channel of ventilating opening formation.Direct type backlight assembly of the present invention also can include one in order to cover connect reflection seat preceding frame, be arranged at before fan on the frame, frame then has and the gas channel opening opposing before this, fan is then in order to blast air/to bloat gas channel.In addition, also configurable on buffer stopper have a radiating fin, and the electrode tip of fluorescent tube produces and accumulate in the used heat of buffer stopper, can be by the radiating fin loss to extraneous.Wherein, the material of buffer stopper can be rubber or heat conductive rubber.

Description of drawings

For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.

Fig. 1 represents the synoptic diagram of traditional direct type backlight assembly.

Fig. 2 A represents according near the synoptic diagram the close air vent of reflection seat side in the direct type backlight assembly of preferred embodiment of the present invention.

Fig. 2 B represents the vertical view that does not cover the direct type backlight assembly that is connected to cover cap as yet of Figure 1A.

Fig. 3 represents the vertical view with the direct type backlight assembly of cover cap housing buffer stopper.

Fig. 4 represents the synoptic diagram of the buffer stopper of cover cap and socket fluorescent tube.

Fig. 5 represents that reflection seat and cover connect the synoptic diagram of the preceding frame of reflection seat.

Fig. 6 is shown in the synoptic diagram of configuration radiating fin on the buffer stopper.

Embodiment

Please be simultaneously with reference to Fig. 2 A and Fig. 2 B, Fig. 2 A represents that according near the synoptic diagram the close air vent of reflection seat side in the direct type backlight assembly of preferred embodiment of the present invention Fig. 2 B represents the vertical view that does not cover the direct type backlight assembly that is connected to cover cap as yet of Figure 1A.For making feature of the present invention be able to comparatively clearly go out with graphic representation, Fig. 2 A and Fig. 2 B are respectively the cover cap synoptic diagram before the housing buffer stopper not as yet.Direct type backlight assembly includes reflection seat 210, buffer stopper 215, fluorescent tube 220 and cover cap (not showing among the figure).

Fluorescent tube 220 is in order to the light source as direct

type backlight assembly

200, and 210 of reflection seats reflex on the TFT-LCD panel equably in order to 220 emitted light beams of fluorescent tube.

The both sides of reflection seat 210 on outstanding dual side-edge 235, have a pair of ventilating opening 240a and the 240b that runs through reflection seat 210 dual side-edges 235 respectively.215 of buffer stoppers are arranged on the reflection seat 210, and buffer stopper 215 is relative with ventilating opening 240a or 240b.Fluorescent tube 220 has two electrode tips, and electrode tip is socketed in the buffer stopper 215.

Please refer to Fig. 3, its expression is with the vertical view of the direct type backlight assembly of cover cap housing buffer stopper.Cover cap 230a, the 230b of direct type backlight assembly 200 are in order to housing buffer stopper 215.And cover cap 230a inner face and cover cap 230b inner face form gas channel 250a and the 250b that runs through

cover cap

230a and 230b with ventilating

opening

240a and 240b (Fig. 2 B) respectively.

Please be simultaneously with reference to Fig. 2 A, Fig. 3 and Fig. 4.Fig. 4 represents the synoptic diagram of the buffer stopper of cover cap and socket fluorescent tube.The buffer stopper 215 of the electrode tip of socket fluorescent tube 220 is arranged on the reflection seat 210 of the preceding optical assembly 200 of straight-down negative.And the top of buffer stopper 215 is that cover cap 230a and the 230b that runs through covers with hollow and both sides then.The both sides of running through of

cover cap

230a, 230b are communicated with ventilating

opening

240a, 240b on the side 235 of reflection seat 210 respectively, and become gas channel 250a, 250b.Therefore, the used heat that electrode tip discharged of fluorescent tube 210 can conduct to buffer stopper 215 earlier, and then by the air among gas channel 250a, the 250b with the used heat band from direct type backlight assembly 200.

Please refer to Fig. 5, its expression reflection seat and the synoptic diagram that covers the preceding frame that connects reflection seat.On the practice, direct type backlight assembly of the present invention also can include a preceding frame 260 that connects reflection seat 210 in order to cover.Preceding 260 of frames have and

gas channel

250b, 250a (not showing among the figure) opening opposing 265b, 265a (not showing among the figure).And, on the preceding frame 260 fan can be set, this fan can be in order to blast air/to bloat gas channel 250b.

Cover connects the preceding frame 260 of reflection seat 210, is owing to the required of black box is provided with.And opening 265b is arranged on and makes cold air be able to more or less freely entering among the gas channel 250b.And, make cold air be able to relatively easily the used heat band that electrode tip discharged with fluorescent tube from direct type backlight assembly.And the fan on the frame 260 before being arranged at, mode that then can forced convertion is strengthened loosing but of used heat.

Please refer to Fig. 6, it is shown in the synoptic diagram of configuration radiating fin on the buffer stopper.In the direct type backlight assembly of the present invention, also configurable on buffer stopper 215 have a radiating fin 270.The electrode tip of fluorescent tube produces and accumulates in the used heat of buffer stopper 215, can be by radiating fin 270 loss to extraneous, in order to heat radiation.Wherein, the material of buffer stopper 215 then can be rubber or transcalent heat conductive rubber.

As from the foregoing, direct type backlight assembly of the present invention, the cover cap and reflection seat that has ventilating opening and opening respectively and the formed gas channel of preceding frame that run through by hollow and both sides, with the natural convection or the mode of forced convertion, with the used heat band that electrode tip discharged of fluorescent tube from direct type backlight assembly.

Therefore, the disclosed direct type backlight assembly of the above embodiment of the present invention, the advantage that is had is: because of the used heat that electrode tip discharged of fluorescent tube can effectively be discharged, heat can not be accumulated in the direct type backlight assembly, and the temperature of direct type backlight assembly is improved.Direct type backlight assembly of the present invention is just had good briliancy performance.

In sum; though the present invention discloses as above with embodiment, so it is not that any those skilled in the art without departing from the spirit and scope of the present invention in order to qualification the present invention; when can being used for a variety of modifications and variations, so protection scope of the present invention is as the criterion when looking appending claims.

Claims

1. direct type backlight assembly comprises:

One reflection seat, its dual side-edge form a pair of ventilating opening that runs through;

One buffer stopper is arranged on this reflection seat, and this buffer stopper is relative to ventilating opening with this; And

One fluorescent tube has two electrode tips, and this two electrode tip is socketed in this buffer stopper.

2. direct type backlight assembly as claimed in claim 1 wherein also comprises a cover cap in order to this buffer stopper of cover cap, and this cover cap inner face and this ventilating opening form a gas channel.

3. direct type backlight assembly as claimed in claim 2 comprises also that wherein one connects the preceding frame of this reflection seat in order to cover, this preceding frame have one with this gas channel opening opposing.

4. direct type backlight assembly as claimed in claim 3 comprises also that wherein one is arranged at the fan on this preceding frame, and this fan is in order to blast air/to bloat this gas channel.

5. as each described direct type backlight assembly among the claim 1-4, wherein also dispose a radiating fin on this buffer stopper, this two electrode tip produces and accumulates in the used heat of this buffer stopper, can be by this radiating fin loss to extraneous.

6. direct type backlight assembly as claimed in claim 1, wherein the material of this buffer stopper is a rubber.

7. direct type backlight assembly as claimed in claim 1, wherein the material of this buffer stopper is a heat conductive rubber.

8. direct type backlight assembly as claimed in claim 5, wherein the material of this buffer stopper is a rubber.

9. direct type backlight assembly as claimed in claim 5, wherein the material of this buffer stopper is a heat conductive rubber.