CN103062677A - Backlight module and display device with same - Google Patents

Abstract

The invention relates to a backlight module and a display device with the same. The backlight module comprises a light source, a substrate, a first metal rear panel and a second metal rear panel. The substrate bears the light source, the first metal rear panel is provided with a first heat conducting coefficient and butts against the substrate, and the second metal rear panel is provided with a second heat conducting coefficient and butts against a part of the first metal rear panel in coinciding mode. The first heat conducting coefficient is larger than the second heat conducting coefficient. The backlight module and the display device with the backlight module are provided with a plurality of metal rear panels with different heat conducting coefficients. A radiating effect and product cost of the backlight module can both be considered.

Description

Backlight module with have a display unit of backlight module

Technical field

The present invention is about a kind of backlight module and have the display unit of backlight module, espespecially a kind of backlight module of a plurality of metal backings with different thermal conductivity factors and have the display unit of backlight module.

Background technology

Along with the progress of electronic technology, display unit is more and more universal.When the user is more and more higher to the brightness requirement of display unit, the light that the light source that backlight module disposes in the display unit sends just needs stronger, thereby the temperature that light source produces is also higher.Along with the service time of display unit is more and more longer, it is more important that the heat radiation of backlight module just seems.

At present with so that in the backlight module metal backing of light source heat radiation be all the metal backing of single-piece, if select the general metal material of thermal conductivity factor as metal backing, though the cost of product is lower, the effect of light source heat radiation is real in the backlight module belongs to limited.If select the higher metal material of thermal conductivity factor as metal backing, though can improve the radiating effect of light source in the backlight module, the cost of product also improves thereupon.Therefore, for the heat dissipation problem of light source in the backlight module, how taking into account radiating effect and product cost becomes an important topic.

Summary of the invention

Therefore, one of purpose of the present invention is to provide a kind of backlight module of a plurality of metal backings with different thermal conductivity factors and has the display unit of this backlight module, with radiating effect and the product cost of taking into account backlight module.

The invention provides a kind of backlight module, this backlight module comprises: light source; Substrate carries this light source; The first metal backing has the first thermal conductivity factor, this this substrate of the first metal backing butt; And second metal backing, having the second thermal conductivity factor, this second metal backing and this first metal backing part be butt overlappingly; Wherein, this first thermal conductivity factor is greater than this second thermal conductivity factor.

In an embodiment, this substrate is metal substrate.

In another embodiment, this metal substrate is aluminium base or copper base.

In another embodiment, this substrate has first surface, second, the 3rd and fourth face, this first surface is relative with the 3rd, the the one these two relative with this fourth face, this first surface, this second, the 3rd are sequentially adjacent in twos with this fourth face, this substrate carries this light source by this first surface, and this first metal backing at least this second, the 3rd of this substrate of butt with one of them of this fourth face.

In a preferred embodiment, this first metal backing has first end and the second end, this first end presents the ㄇ font, this first metal backing by this second, the 3rd of this this substrate of first end butt that presents the ㄇ font with this fourth face, and this first metal backing is by this second end and this second metal backing butt overlappingly partly.

The invention provides a kind of display unit, this display unit comprises: panel; Light guide, contiguous this panel arranges; And backlight module, contiguous this light guide arranges, and this backlight module comprises: light source, this light source is luminous towards this light guide; Substrate carries this light source; The first metal backing has the first thermal conductivity factor, this this substrate of the first metal backing butt; And second metal backing, having the second thermal conductivity factor, this second metal backing and this first metal backing part be butt overlappingly; Wherein, this first thermal conductivity factor is greater than this second thermal conductivity factor.

In another preferred embodiment, this substrate is metal substrate.

In another preferred embodiment, this metal substrate is aluminium base or copper base.

In a specific embodiment, this substrate has first surface, second, the 3rd and fourth face, this first surface is relative with the 3rd, the the one these two relative with this fourth face, this first surface, this second, the 3rd are sequentially adjacent in twos with this fourth face, this substrate carries this light source by this first surface, and this first metal backing at least this second, the 3rd of this substrate of butt with one of them of this fourth face.

In another specific embodiment, this first metal backing has first end and the second end, this first end presents the ㄇ font, this first metal backing by this second, the 3rd of this this substrate of first end butt that presents the ㄇ font with this fourth face, and this first metal backing is by this second end and this second metal backing butt overlappingly partly.

In sum, backlight module of the present invention and the display unit with backlight module have a plurality of metal backings of different thermal conductivity factors, by this, can take into account radiating effect and the product cost of backlight module.

Description of drawings

Fig. 1 is the schematic diagram of display unit according to an embodiment of the invention.

Fig. 2 is the schematic diagram of the backlight module among Fig. 1.

The specific embodiment

For making purpose of the present invention, structure, feature and function thereof there are further understanding, hereby cooperate embodiment to be described in detail as follows.

See also Fig. 1, Fig. 1 is the schematic diagram of display unit according to an embodiment of the invention.As shown in Figure 1,display unit 1 comprisespanel 30,light guide 50,backlight module 10 and housing 70.Light guide 50contiguous panels 30 arrange, andbacklight module 10contiguous light guides 50 arrange, andpanel 30,light guide 50 then all are arranged in thehousing 70 formed accommodation spaces with backlight module 10.Backlight module 10 compriseslight source 101,substrate 103, thefirst metal backing 105 and the second metal backing 107.Light source 101 is luminous towardslight guide 50, and 103 of substrates are in order to carry light source 101.Havecontrol light source 101 on thesubstrate 103 and be linked to the required circuit of other assembly in thedisplay unit 1, because it is the known technology of this area general technology personage, so do not give unnecessary details at this.Thefirst metal backing 105 has the first thermal conductivity factor, and the first metal backing 105 butt substrates 103.107 of the second metal backings have the second thermal conductivity factor, and the second metal backing 107 and the first metal backing 105 parts butt overlappingly.The butt of thesecond metal backing 107 and the first metal backing 105 overlapping positions, can by the height of thefirst metal backing 105 ofhousing 70,panel 30,light guide 50 andbacklight module 10 and thesecond metal backing 107 suitably design can also weld or alternate manner is combined closely the overlapping position of thesecond metal backing 107 and thefirst metal backing 105 to reach.Wherein, the first thermal conductivity factor is greater than the second thermal conductivity factor.In one embodiment of this invention,substrate 103 is the metal substrate of aluminium base or copper base etc.In different embodiment,substrate 103 also can be the made metal substrate of other metal.

See also Fig. 2, Fig. 2 is the schematic diagram of the backlight module among Fig. 1.Substrate 103 hasfirst surface 1031,second 1033, the 3rd 1035 and fourth face 1037.First surface 1031 is 1035 relative with the 3rd, and second 1033 relative withfourth face 1037, andfirst surface 1031, second 1033, the 3rd 1035 are sequentially adjacent in twos with fourth face 1037.Substrate 103 is byfirst surface 1031 carryinglight sources 101, and one of them of second 1033 ofbutt substrate 103 at least of thefirst metal backing 105, the 3rd 1035 and fourth face 1037.In one embodiment of this invention, thefirst metal backing 105 hasfirst end 1051 and the second end 1053.First end 1051 presents the ㄇ font, and the first metal backing 105 by second 1033 of thefirst end 1051butt substrates 103 that present the ㄇ font, the 3rd 1035 with fourth face 1037.The first metal backing 105 and by thesecond end 1053 and the second metal backing 107 parts butt overlappingly.In different embodiment, thefirst end 1051 of thefirst metal backing 105 also can present other shape beyond the ㄇ font.For example: thefirst end 1051 of thefirst metal backing 105 can present L shaped, and thefirst metal backing 105 can be by the 3rd 1035 andfourth face 1037 presenting L shapedfirst end 1051 butt substrates 103.Perhaps, thefirst end 1051 of thefirst metal backing 105 can be the plane, and only withfourth face 1037 butts of substrate 103.In the structure in the present embodiment, because thesubstrate 103 that carrieslight source 101 has the first relativelyhigh metal backing 105 of thermal conductivity factor for directly being connected to, the heat thatlight source 101 is produced can conduct to thefirst metal backing 105 as early as possible effectively.Metal backing because ofbacklight module 10 is that thefirst metal backing 105 andsecond metal backing 107 of butt consist of jointly overlappingly by part again, though the design by thermal conductivity factor second metal backing 107 relatively low not as thefirst metal backing 105 but cost still can make the heat that conducts to thefirst metal backing 105 further conduct to thesecond metal backing 107 again.Such metal backing design all only is made of the metal with second thermal conductivity factor compared to the bulk metal backboard, can effectively make thelight source 101 ofbacklight module 10 obtain good heat radiation; And all only be made of the metal with first thermal conductivity factor compared to the bulk metal backboard, product cost will have more advantage.

In sum, backlight module of the present invention and the display unit with backlight module have a plurality of metal backings of different thermal conductivity factors, by this, can take into account radiating effect and the product cost of backlight module.

The present invention is described by above-mentioned related embodiment, yet above-described embodiment is only for implementing example of the present invention.Must be pointed out that the embodiment that has disclosed does not limit the scope of the invention.On the contrary, the change of doing without departing from the spirit and scope of the present invention and retouching all belong to scope of patent protection of the present invention.

Claims (10)

1. backlight module is characterized in that this backlight module comprises:

Light source;

Substrate carries this light source;

The first metal backing has the first thermal conductivity factor, this this substrate of the first metal backing butt; And

The second metal backing has the second thermal conductivity factor, and this second metal backing and this first metal backing part be butt overlappingly;

Wherein, this first thermal conductivity factor is greater than this second thermal conductivity factor.

2. backlight module as claimed in claim 1,, it is characterized in that this substrate is metal substrate.

3. backlight module as claimed in claim 2 is characterized in that this metal substrate is aluminium base or copper base.

4. backlight module as claimed in claim 1, it is characterized in that this substrate has first surface, second, the 3rd and fourth face, this first surface is relative with the 3rd, the the one these two relative with this fourth face, this first surface, this second, the 3rd are sequentially adjacent in twos with this fourth face, this substrate carries this light source by this first surface, and this first metal backing at least this second, the 3rd of this substrate of butt with one of them of this fourth face.

5. backlight module as claimed in claim 4, it is characterized in that this first metal backing has first end and the second end, this first end presents the ㄇ font, this first metal backing by this second, the 3rd of this this substrate of first end butt that presents the ㄇ font with this fourth face, and this first metal backing is by this second end and this second metal backing butt overlappingly partly.

6. display unit is characterized in that this display unit comprises:

Panel;

Light guide, contiguous this panel arranges; And

Backlight module, contiguous this light guide arranges, and this backlight module comprises:

Light source, this light source is luminous towards this light guide;

Substrate carries this light source;

The first metal backing has the first thermal conductivity factor, this this substrate of the first metal backing butt; And

The second metal backing has the second thermal conductivity factor, and this second metal backing and this first metal backing part be butt overlappingly;

Wherein, this first thermal conductivity factor is greater than this second thermal conductivity factor.

7. display unit as claimed in claim 6 is characterized in that this substrate is metal substrate.

8. display unit as claimed in claim 7 is characterized in that this metal substrate is aluminium base or copper base.

9. display unit as claimed in claim 6, it is characterized in that this substrate has first surface, second, the 3rd and fourth face, this first surface is relative with the 3rd, the the one these two relative with this fourth face, this first surface, this second, the 3rd are sequentially adjacent in twos with this fourth face, this substrate carries this light source by this first surface, and this first metal backing at least this second, the 3rd of this substrate of butt with one of them of this fourth face.

10. display unit as claimed in claim 9, it is characterized in that this first metal backing has first end and the second end, this first end presents the ㄇ font, this first metal backing by this second, the 3rd of this this substrate of first end butt that presents the ㄇ font with this fourth face, and this first metal backing is by this second end and this second metal backing butt overlappingly partly.

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