CN102242896A - LED (Light Emitting Diode) backlight device - Google Patents
LED (Light Emitting Diode) backlight device Download PDFInfo
- Publication number
- CN102242896A CN102242896A CN2011101917423A CN201110191742A CN102242896A CN 102242896 A CN102242896 A CN 102242896A CN 2011101917423 A CN2011101917423 A CN 2011101917423A CN 201110191742 A CN201110191742 A CN 201110191742A CN 102242896 A CN102242896 A CN 102242896A
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- circuit board
- printed circuit
- led
- led lamp
- base material
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Abstract
The invention discloses an LED (Light Emitting Diode) backlight device which comprises an LED lamp and a printed circuit board, wherein the LED lamp is glued on the back surface of the printed circuit board; the printed circuit board comprises a base material, a copper foil layer and a green oil layer; the copper foil layer covers on the surface of the base material; and the green oil layer is printed on the copper foil layer. The LED backlight device is characterized in that a photic zone is formed in the position of the printed circuit board, which corresponds to the LED lamp; and the photic zone only comprises the base material. The photic zone is formed by removing copper foils and green oil in light conducting positions of the printed circuit board, so that the LED lamp illuminates uniformly in a certain area; displayed light rays are soft and attractive; and the LED backlight device has the advantages of small occupied space and cost saving performance.
Description
Technical field
The present invention relates to a kind of LED-backlit device, especially a kind of LED lamp luminous uniform back lighting device in certain zone that makes.
Background technology
That being developed as of household appliances pursued is high-grade, visual effect intuitively, icon that shows in the product design process or pattern have required soft, a uniform backlight, and to accomplish in design backlight that with low cost, structural design does not exquisitely take up room, the soft requirement such as evenly of light.
In the household appliances design, the traditional backlight scheme of little pattern demonstration backlight generally has two kinds: a kind of is the back side that luminous tube is contained in printed circuit board, the light of luminous tube sees through luminous backlight as display pattern of the grooved bore of printed circuit board, as Granted publication number is the disclosed a kind of backlighting device for keypad of Chinese patent of CN201435331Y, be provided with loophole around each button of button pcb board, be provided with illuminatian plate below the pcb board, illuminatian plate is provided with at least one light source, the position of light source is corresponding with the position of button, be arranged on the following of button or near, though the scheme cost of this demonstration backlight is low but pattern does not have a kind of soft effect on visual angle, and light-emitting zone is difficult to do greatly.
Another displaying scheme is: with the expensive optical material leaded light of light of luminous tube, be re-used as the backlight that display pattern needs, as Granted publication number is the disclosed a kind of LED-backlit source structure of Chinese patent of CN201284964Y, comprise LGP and the pcb board that is located at LGP one side, the one side of pcb board is provided with the LED lamp, the top of LED lamp is facing to LGP, though this mode backlight can provide soft backlight, but price is very high, light source places between optical material and the printed circuit board and causes heat dispersion poor, and comparatively takies the structure space of product.
Summary of the invention
Technical problem to be solved by this invention provides a kind of LED-backlit device, makes the LED lamp luminous evenly in certain zone, soft, attractive in appearance and little, the saving cost that takes up room of the light of demonstration.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of LED-backlit device, comprise LED lamp and printed circuit board, described LED is attached to the described printed circuit board back side, described printed circuit board comprises base material, cover the copper foil layer of described substrate surface and be printed on green oil layer on the described copper foil layer, it is characterized in that, the position of the corresponding described LED lamp of described printed circuit board forms transparent area, and described transparent area only has base material.
Preferably, described printed circuit board is the circuit board of FR4 specification.
Compared with prior art, the invention has the advantages that: form transparent area by Copper Foil and the green oil that removes printed circuit board leaded light position, make the light of LED lamp pass through diffuse reflection in translucent base material, reflection and diffraction, provide even, soft light source at transparent area thus, thereby need not by LGP, reduce cost, reduced the structure space of product; The LED lamp is set directly at the back side of printed circuit board, has increased area of dissipation, promoted heat dispersion, help to prolong the life-span of LED-backlit device.
Description of drawings
Fig. 1 is a LED-backlit schematic representation of apparatus of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to profile;
The schematic diagram that Fig. 3 uses for LED-backlit device of the present invention.
Fig. 4 is the display effect figure of Fig. 3 application example.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Referring to Fig. 1 and Fig. 2, a kind of LED-backlit device comprises LED lamp 1 and printed circuit board 2.Printed circuit board 2 is used for driving LED lamp 1, comprises base material 21, covers the copper foil layer 22 on base material 21 surfaces and is printed on green oil layer 23 on the copper foil layer 22.LED lamp 1 is attached to the back side of printed circuit board 2, and the position of corresponding LED lamp 1 has been removed copper foil layer 22 and green oil layer 23 and base material 21 is only arranged on the printed circuit board 2, and base material 21 is translucent, has formed transparent area 24 in this position thus.
Preferably, printed circuit board 2 can adopt the circuit board of FR4 specification.Base material 21 is made for epoxy resin, diffuse reflection takes place in the light of LED lamp 1 in base material 21, the phenomenon of refraction and diffraction, make dazzling originally, the little LED lamp 1 in sense organ zone presents a luminous uniform light district on printed circuit board 2, with this light district as the backlight of wanting display pattern, just can make pattern luminous evenly, soft, visually feel soft, attractive in appearance, pattern non-uniform light can not occur, local dazzling phenomenon, and saved expensive optical material, saved cost, be particularly useful for backlight design and require soft, evenly, the occasion that structure is narrower and small.
Referring to Fig. 3, be the example that LED-backlit device of the present invention is used, this LED-backlit device is used for the demonstration of kitchen utensils such as guidance panels such as range hood or micro-wave oven.Be formed with transparent area 24 and copper film key zone 25 on the printed circuit board 2, LED lamp 1 is posted at the back side of printed circuit board 2, and the front is provided with silk-screen display board 3, and the little pattern that will show on the silk-screen display board 3 is corresponding with the position of LED lamp 1, transparent area 24.
Referring to Fig. 4, be the display effect figure of the application example of Fig. 3, by among Fig. 4 as can be known, the light of LED lamp 1 is soft, even, has good display effect.
The above is a preferred implementation of the present invention only, should be pointed out that for the ordinary skill in the art, not breaking away under the principle prerequisite of the present invention, can also make various deformation and improvement, and this also should be considered as protection scope of the present invention.
Claims (2)
1. LED-backlit device, comprise LED lamp (1) and printed circuit board (2), described LED (1) is attached to described printed circuit board (2) back side, described printed circuit board (2) comprises base material (21), cover the copper foil layer (22) on described base material (21) surface and be printed on green oil layer (23) on the described copper foil layer (22), it is characterized in that, the position of the corresponding described LED lamp of described printed circuit board (2) (1) forms transparent area (24), and described transparent area (24) only has base material (21).
2. back lighting device as claimed in claim 1 is characterized in that, described printed circuit board (2) is the circuit board of FR4 specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110191742.3A CN102242896B (en) | 2011-07-07 | 2011-07-07 | A kind of LED-backlit device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110191742.3A CN102242896B (en) | 2011-07-07 | 2011-07-07 | A kind of LED-backlit device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102242896A true CN102242896A (en) | 2011-11-16 |
| CN102242896B CN102242896B (en) | 2015-11-25 |
Family
ID=44961079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110191742.3A Active CN102242896B (en) | 2011-07-07 | 2011-07-07 | A kind of LED-backlit device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102242896B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101761810A (en) * | 2010-02-25 | 2010-06-30 | 宁波复洋光电有限公司 | White light plane light source LED module and manufacturing method thereof |
| CN201608079U (en) * | 2010-02-06 | 2010-10-13 | 厦门鑫铭科技有限公司 | Film keystroke with backlight |
| CN202203761U (en) * | 2011-07-07 | 2012-04-25 | 宁波方太厨具有限公司 | LED backlight device |
-
2011
- 2011-07-07 CN CN201110191742.3A patent/CN102242896B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201608079U (en) * | 2010-02-06 | 2010-10-13 | 厦门鑫铭科技有限公司 | Film keystroke with backlight |
| CN101761810A (en) * | 2010-02-25 | 2010-06-30 | 宁波复洋光电有限公司 | White light plane light source LED module and manufacturing method thereof |
| CN202203761U (en) * | 2011-07-07 | 2012-04-25 | 宁波方太厨具有限公司 | LED backlight device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102242896B (en) | 2015-11-25 |
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