CN2429853Y - Background and front light sources with high effective side luminous lights - Google Patents
Background and front light sources with high effective side luminous lights Download PDFInfo
- Publication number
- CN2429853Y CN2429853Y CN 00233726 CN00233726U CN2429853Y CN 2429853 Y CN2429853 Y CN 2429853Y CN 00233726 CN00233726 CN 00233726 CN 00233726 U CN00233726 U CN 00233726U CN 2429853 Y CN2429853 Y CN 2429853Y
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- China
- Prior art keywords
- guide plate
- light guide
- light
- level efficiency
- source
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Planar Illumination Modules (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
The utility model relates to a background and foreground light source, which is used for the illumination of a liquid crystal displayer. The utility model comprises a light-emitting source and a light guide plate, wherein, the upper surface of the light guide plate is a mirror surface or a rough surface, and the lower surface is a smooth and clean uneven surface; the light-emitting source which is composed of an ultra bright LED chip or a lamp is arranged at the point of one or a plurality of side angles of the light guide plate, the light is reflected in from the side angle edge and is diffused so that the light can be uniformly distributed on the light guide plate, and dead angles and blind angles are reduced or even eliminated. The light can be led into the point of the side angle of the light guide plate by optical fibers. When the utility model is used as the background light source, the lower surface of the light guide plate is additionally provided with a reflection film, and the upper surface of the light guide plate can be additionally provided with a single layer of diffusion film or multiple layers of diffusion films.
Description
The utility model relates to a kind of light source, relates to a kind of backlight or front light source that is used for low power consumption liquid crystal LCD display system or rather.
Backlight or front light source mainly is made up of light emitting source and light guide plate, existingly both at home and abroad be used for backlight or prospect luminous light source sidelight source normally, its light emitting source all is arranged on a side (face or limit) of light guide plate, when this side or side are longer, then more light emitting source need be set,, could eliminate substantially " dark space " as the LED pipe, the backlight that present PDA palm PC liquid crystal LCD display is used adopts this frame mode exactly, as adopts four super bright light emitting diodes (LED).But, because the back facet current that the PDA palm PC can provide has only about 6 to 20 milliamperes, also being that the electric current that flows through in each light emitting diode has only 1.5 to 5 milliamperes, is 20 milliamperes superbright light emitting diode (LED) for rated current, just can only be operated under the undercurrent situation.On the other hand, the price of white, blue look, green super bright light emitting diode (LED) is very high, so, adopt four light emitting diodes (LED) that cost is increased, and optical efficiency is very low.
The purpose of this utility model is the side luminous backlight and front light source of a kind of high-level efficiency of design, it is a kind of backlight and front light source of side angle projection light emitting of uniform high-efficiency rate, can significantly reduce the quantity of light emitting diode (LED) and reduce cost, and can improve luminescence efficiency and reduce power consumption.
The purpose of this utility model is achieved in that the side luminous backlight and front light source of a kind of high-level efficiency, comprise light emitting source and light guide plate, the upper surface of light guide plate is minute surface or hair side, the lower surface of light guide plate is bright and clean male and fomale(M﹠F), it is characterized in that: described light emitting source is arranged on the side angle place of light guide plate.
Described light emitting source is light-emitting diode chip for backlight unit or LED light lamp.
Described side angle is the one or more side angle of light guide plate.
Also include reflectance coating, be arranged on the lower surface place of described light guide plate.
Also include reflectance coating and one deck diffusion barrier at least, reflectance coating is arranged on the lower surface place of described light guide plate, and the described diffusion barrier of one deck at least is arranged on the upper surface place of described light guide plate.
The described diffusion barrier of one deck at least adds bright enhancement film by diffusion barrier and adds that diffusion barrier is superimposed to be formed.
Also include optical fiber, be connected with described light emitting source, optical fiber is not held the side angle place that is arranged on described light guide plate.
The sectional area of described optical fiber is 0.008 square millimeter to 80 square millimeters.
Described light guide plate is that thickness is 0.1 millimeter to 10 millimeters rigid or soft plastic sheet.
The concavo-convex lower surface of described light guide plate is point-like or rectangular strip or circular-arc pit that is irregular distribution or projection.
The side luminous backlight and front light source of high-level efficiency of the present utility model, light emitting source is arranged on the one or more side angle place of light guide plate, allow side angle become the angle of injecting of light, be that light is injected to scatter from the side angle limit of light guide plate again and come, can make full use of this and be less than or equal to the 90 degree angle of (or being less than or equal to 180 degree), light on the light guide plate is evenly distributed, dead angle on minimizing and elimination light distribute or dark angle, thereby form a kind of low cost, low-power consumption, luminous backlight of high efficiency side angle and front light source can be used as the front illumination or the background illumination of products such as LCD LCD.
Further specify technology of the present utility model below in conjunction with embodiment and accompanying drawing
Fig. 1 is the side luminous front light source of a utility model plane plan structure synoptic diagram
Fig. 2 is the side luminous back light side-looking of a utility model structural representation
Referring to Fig. 1, the side luminous front light source of the utility model mainly comprises light guide plate 1 and light emitting source 2.Light emitting source 2 is superbright led light sources, can be the light emitting source of being made up of led chip or LED lamp, and the light-conductive rate of light guide plate 1 is 80-99% (transparent a, transmittance), is that thickness is the rigid of 0.1mm-10mm or soft plastic sheet, can be quadrilateral (or polygon).The upper surface of light guide plate 1 is minute surface or hair side (male and fomale(M﹠F)), and point-like or rectangular strip or circular-arc and be the pit or the projection of irregular distribution are arranged on the lower surface of light guide plate 1, and during as front light source, the smooth finish of its lower surface need meet certain requirements.
The utility model is arranged on one or more side angle 11 places of light guide plate 1 with superbright led light source 2, and as shown in FIG., light is injected from a side angle limit of quadrilateral light guide plate 1, scatters and comes.With the inject angle of one or more light guide plate side angle 11 as light, made full use of be less than or equal on the light guide plate 90 the degree, in other words be less than or equal to 180 the degree angles, make the distribution of light on the light guide plate 1 even, to reduce even to eliminate photodistributed dead angle or dark angle.
During enforcement, except light emitting source 2 being set directly at the side angle place of light guide plate 1, also can be by side angle 11 places of optical fiber with the light introducing light guide plate 1 of distant place light emitting source, the sectional area of optical fiber can be 0.008-80mm2.
Referring to Fig. 2, the difference of side luminous back light and front light source shown in Figure 1 is that the lower surface in light guide plate 1 also is provided with reflectance coating 3, upper surface in light guide plate 1 then can be provided with diffusion barrier 4 (also diffusion barrier 4 or any diaphragm can be set), this diffusion barrier 4 can be single layer structure, also can be sandwich construction, as forming by diffusion barrier+bright enhancement film+diffusion barrier.Also other has any form and spreads all single or multiple lift diaphragms of light and light enhancing effect this diffusion barrier.
The side luminous backlight and front light source of high-level efficiency of the present utility model is during the background illumination that can be used for the LCD display system of the translation of PDA palm PC, palm register system, wireless mobile phone and various requirement low-power consumption is thrown light on prospect.
Claims (10)
1. the side luminous backlight and front light source of high-level efficiency comprises light emitting source and light guide plate, and the upper surface of light guide plate is minute surface or hair side, and the lower surface of light guide plate is bright and clean male and fomale(M﹠F), it is characterized in that: described light emitting source is arranged on the side angle place of light guide plate.
2. the side luminous backlight and front light source of a kind of high-level efficiency according to claim 1 is characterized in that: described light emitting source is light-emitting diode chip for backlight unit or LED light lamp.
3. the side luminous backlight and front light source of a kind of high-level efficiency according to claim 1 is characterized in that: described side angle is the one or more side angle of light guide plate.
4. the side luminous backlight and front light source of a kind of high-level efficiency according to claim 1 is characterized in that: also include optical fiber, be connected with described light emitting source, optical fiber is not held the side angle place that is arranged on described light guide plate.
5. the side luminous backlight and front light source of a kind of high-level efficiency according to claim 4 is characterized in that: the sectional area of described optical fiber is 0.008 square millimeter to 80 square millimeters.
6. the side luminous backlight and front light source of a kind of high-level efficiency according to claim 1 is characterized in that: described light guide plate is that thickness is 0.1 millimeter to 10 millimeters rigid or soft plastic sheet.
7. the side luminous backlight and front light source of a kind of high-level efficiency according to claim 1 is characterized in that: the concavo-convex lower surface of described light guide plate is point-like or rectangular strip or circular-arc pit that is irregular distribution or projection.
8. according to claim 1 or 2 or 3 or 4 or 6 or the 7 side luminous backlight and front light sources of described a kind of high-level efficiency, it is characterized in that: also include reflectance coating, be arranged on the lower surface place of described light guide plate.
9. according to claim 1 or 2 or 3 or 4 or 6 or the 7 side luminous backlight and front light sources of described a kind of high-level efficiency, it is characterized in that: also include reflectance coating and one deck diffusion barrier at least, reflectance coating is arranged on the lower surface place of described light guide plate, and the described diffusion barrier of one deck at least is arranged on the upper surface place of described light guide plate.
10. the side luminous backlight and front light source of a kind of high-level efficiency according to claim 9 is characterized in that: the described diffusion barrier of one deck at least adds bright enhancement film by diffusion barrier and adds that diffusion barrier is superimposed to be formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00233726 CN2429853Y (en) | 2000-05-12 | 2000-05-12 | Background and front light sources with high effective side luminous lights |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00233726 CN2429853Y (en) | 2000-05-12 | 2000-05-12 | Background and front light sources with high effective side luminous lights |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2429853Y true CN2429853Y (en) | 2001-05-09 |
Family
ID=33596005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00233726 Expired - Lifetime CN2429853Y (en) | 2000-05-12 | 2000-05-12 | Background and front light sources with high effective side luminous lights |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2429853Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376952C (en) * | 2003-12-08 | 2008-03-26 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN100439996C (en) * | 2003-08-02 | 2008-12-03 | 三星电子株式会社 | Backlight assembly and liquid crystal display apparatus having the same |
| CN101631149B (en) * | 2008-07-17 | 2012-09-26 | 比亚迪股份有限公司 | Mobile phone and method for manufacturing backlight module of shell thereof |
-
2000
- 2000-05-12 CN CN 00233726 patent/CN2429853Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100439996C (en) * | 2003-08-02 | 2008-12-03 | 三星电子株式会社 | Backlight assembly and liquid crystal display apparatus having the same |
| CN100376952C (en) * | 2003-12-08 | 2008-03-26 | 鸿富锦精密工业（深圳）有限公司 | Backlight module |
| CN101631149B (en) * | 2008-07-17 | 2012-09-26 | 比亚迪股份有限公司 | Mobile phone and method for manufacturing backlight module of shell thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| FG1K | Grant of utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20010509 |