CN202203761U - LED backlight device - Google Patents
LED backlight device Download PDFInfo
- Publication number
- CN202203761U CN202203761U CN2011202411594U CN201120241159U CN202203761U CN 202203761 U CN202203761 U CN 202203761U CN 2011202411594 U CN2011202411594 U CN 2011202411594U CN 201120241159 U CN201120241159 U CN 201120241159U CN 202203761 U CN202203761 U CN 202203761U
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- China
- Prior art keywords
- circuit board
- printed circuit
- led
- led lamp
- copper foil
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- Expired - Lifetime
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Abstract
The utility model discloses an LED backlight device, comprising an LED lamp and a printed circuit board. The LED is pasted to the back side of the printed circuit board. The printed circuit board comprises base materials, a copper foil layer covering the base materials, and a green oil layer printed on the copper foil layer. The LED backlight device is characterized in that a photopermeable zone corresponding to the LED lamp is formed at the printed circuit board; the photopermeable zone only has base materials. The LED backlight device is advantageous in that the photopermeable zone is formed through removing copper foil and green oil at the light-guiding position of the printed circuit board; the light emitting of the LED lamp is even within a certain region; the light is soft and beautiful; the occupation space is small and cost is saved.
Description
Technical field
The utility model 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, number be the disclosed a kind of backlighting device for keypad of Chinese patent of CN201435331Y like Granted publication, and each button of button pcb board is provided with loophole on every side; Be provided with illuminatian plate below the pcb board; Illuminatian plate is provided with at least one light source, and 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.
A kind of in addition displaying scheme is: the light of luminous tube is used expensive optical material leaded light; Remaking the backlight that needs for display pattern, number be the disclosed a kind of LED-backlit source structure of Chinese patent of CN201284964Y like Granted publication, comprises LGP and is located at the pcb board of 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, 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.
The utility model content
The utility model technical problem to be solved 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 utility model 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; Said LED is attached to the said printed circuit board back side, and said printed circuit board comprises base material, covers the copper foil layer of said substrate surface and is printed on the green oil layer on the said copper foil layer, it is characterized in that; The position of the corresponding said LED lamp of said printed circuit board forms transparent area, and said transparent area only has base material.
Preferably, said printed circuit board is the circuit board of FR4 specification.
Compared with prior art; The advantage of the utility model is: Copper Foil and green oil through removing printed circuit board leaded light position form transparent area; Make the light of LED lamp pass through diffuse reflection in translucent base material, reflection and diffraction, at transparent area even, soft light source is provided 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 the utility model LED-backlit schematic representation of apparatus;
Fig. 2 is that the A-A of Fig. 1 is to profile;
Fig. 3 is the sketch map that the utility model LED-backlit device is used.
Fig. 4 is the display effect figure of Fig. 3 application example.
The specific embodiment
Embodiment describes in further detail the utility model 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 the 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 copper foil layer 22 has been removed in the position of corresponding LED lamp 1 on the printed circuit board 2 only has base material 21 with green oil layer 23, 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 processed for epoxy resin; The phenomenon of diffuse reflection, refraction and diffraction takes place in the light of LED lamp 1 in base material 21, make dazzling originally, the regional little LED lamp 1 of sense organ on printed circuit board 2, present a luminous uniform light district, with this light district as the backlight of wanting display pattern; Just can make pattern luminous even, soft; Visually feel soft, attractive in appearance, non-uniform light, local dazzling phenomenon can not appear in pattern, and have saved expensive optical material; Practiced thrift cost, be particularly useful for backlight design and require the occasion soft, even, that structure is narrower and small.
Referring to Fig. 3, be the instance that the LED-backlit device of the utility model 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 knowing among Fig. 4, the light of LED lamp 1 is soft, even, has good display effect.
The above is merely the preferred implementation of the utility model; Should be pointed out that for those of ordinary skill in the art, do not breaking away under the principle prerequisite of the utility model; Can also make various deformation and improvement, this also should be regarded as the protection domain of the utility model.
Claims (2)
1. LED-backlit device; Comprise LED lamp (1) and printed circuit board (2); Said LED (1) is attached to said printed circuit board (2) back side, and said printed circuit board (2) comprises base material (21), covers the copper foil layer (22) on said base material (21) surface and is printed on the green oil layer (23) on the said copper foil layer (22), it is characterized in that; The position of the corresponding said LED lamp of said printed circuit board (2) (1) forms transparent area (24), and said transparent area (24) only has base material (21).
2. back lighting device as claimed in claim 1 is characterized in that, said printed circuit board (2) is the circuit board of FR4 specification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202411594U CN202203761U (en) | 2011-07-07 | 2011-07-07 | LED backlight device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202411594U CN202203761U (en) | 2011-07-07 | 2011-07-07 | LED backlight device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202203761U true CN202203761U (en) | 2012-04-25 |
Family
ID=45967882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202411594U Expired - Lifetime CN202203761U (en) | 2011-07-07 | 2011-07-07 | LED backlight device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202203761U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242896A (en) * | 2011-07-07 | 2011-11-16 | 宁波方太厨具有限公司 | LED (Light Emitting Diode) backlight device |
| CN104197210A (en) * | 2014-08-22 | 2014-12-10 | 江苏日月照明电器有限公司 | LED low-voltage device capable of passing European ERP6000H authentication and forming method |
-
2011
- 2011-07-07 CN CN2011202411594U patent/CN202203761U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102242896A (en) * | 2011-07-07 | 2011-11-16 | 宁波方太厨具有限公司 | LED (Light Emitting Diode) backlight device |
| CN102242896B (en) * | 2011-07-07 | 2015-11-25 | 宁波方太厨具有限公司 | A kind of LED-backlit device |
| CN104197210A (en) * | 2014-08-22 | 2014-12-10 | 江苏日月照明电器有限公司 | LED low-voltage device capable of passing European ERP6000H authentication and forming method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120425 Effective date of abandoning: 20151125 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |