CN2687711Y - Optical fiber back light source for liquid crystal display - Google Patents
Optical fiber back light source for liquid crystal display Download PDFInfo
- Publication number
- CN2687711Y CN2687711Y CN 200320120701 CN200320120701U CN2687711Y CN 2687711 Y CN2687711 Y CN 2687711Y CN 200320120701 CN200320120701 CN 200320120701 CN 200320120701 U CN200320120701 U CN 200320120701U CN 2687711 Y CN2687711 Y CN 2687711Y
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- CN
- China
- Prior art keywords
- optical fiber
- liquid crystal
- crystal display
- light
- guide plate
- Prior art date
- 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 - Fee Related
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- Light Guides In General And Applications Therefor (AREA)
- Planar Illumination Modules (AREA)
Abstract
The utility model relates to an optical fiber back light source for liquid crystal display, which belongs to the technical field of the optical fiber illumination and is composed of a light source, an even light film, a light conducting plate and a light reflecting film. The utility model is characterized in that one end of the optical fiber which is positioned between the light source and the light conducting plate is coupled with the light source, while the other end is coupled with the side of the light conducting plate. The optical fiber back light source for liquid crystal display made from the scheme in the utility model, has simple preparation process, low cost, small volume and low power consumption. The surface is brightening and uniform. The utility model does not generate electromagnetic interference and can display in true color. The utility model can be broadly used in the fields of the LCD liquid crystal display background light source illumination, the thin-film switch, the medical appliance, etc.
Description
Technical field
Liquid crystal display optical fiber backlight belongs to the optical fibre illumination technical field.
Background technology
Traditional backlight for liquid crystal display source generally has electroluminescence formula (EL), cold-cathode tube and light emitting diode (LED) etc. several.Electroluminescence formula backlight adopts the electroluminescence principle, therefore, can produce electromagnetic interference (EMI) in optical illumination, and its surface brightness also a little less than.The cold-cathode tube light source then needs high pressure to excite, and triggers so it must be furnished with inverter.Owing to be subjected to the restriction of locus, it is not suitable for using on small-size liquid crystal displays.And existing LED-type backlight generally has two kinds of lighting systems.The one, light emitting diode is arranged in the side of light guide plate equidistant intervals, by the surface astigmatism particle formation area source of light guide plate.Because the light emitting diode crystal is that omnidirectional's point-like is luminous, the coupling efficiency of it and light guide plate is very low, inevitably causes the waste of luminous energy.Moreover owing to being spaced of light source, the surperficial light homogeneity of light guide plate is relatively poor.Second kind of arrangement mode is light emitting diode matrix to be arranged form area source.Though this kind backlight has higher brightness and homogeneity, its power consumption and volume are all bigger.
Summary of the invention
The purpose of this utility model is: at the defective of above-mentioned existence, propose a kind of liquid crystal display optical fiber backlight, it is the output of wire optical fiber with the phototransformation that pointolite sends, be coupled with light guide plate then, with raising luminance brightness and optical uniformity, and reduced volume, power consumption reduced.
Technical solution of the present utility model is that it is made of lamp source, even light film, light guide plate, reflective membrane, it is characterized in that: the light transmitting fiber between lamp source and light guide plate, and an end and lamp source coupling, the other end and light guide plate side are coupled.
The available sleeve pipe boundling of one end of light transmitting fiber and lamp source coupling is circular, and the other end is lined up sheet with plastic optical fiber silk planar development, can be by holder and light guide plate coupling.
The coupling scheme of light transmitting fiber and light guide plate can be side couplings, and promptly single face is annotated the light backlight or is coupled promptly two-sided notes light backlight simultaneously in the both sides of correspondence.
Lamp source generally adopts the LED light emitting diode, is asking at different uses, and the LED light emitting diode can be a colour such as white or green, yellow, red.Because fibre-optic bundle and light guide plate all have biography photosensitiveness excellent in visible light (wavelength 380nm-780nm) scope, based on this characteristic, the utility model can be implemented in the versicolor back lighting under the different condition.
Optical fiber material can adopt PS plastic optical fiber silk, PMMS plastic optical fiber silk, and diameter is from 0.1-1.0mm.Because the plastic optical fiber silk has excellent flexible performance and transmitance, therefore provide very flexible design space for space for the liquid crystal display deviser.
The light guide plate material is polycarbonate (PC) light guide plate, organic glass (PMMA) light guide plate, and its thickness is from 0.5-4.0mm.The size of light guide plate can be from 1.5～17 inches.
Even light film can adopt vaporific mylar, maybe can be with the plastic film material of light scatter.
Reflectance coating can adopt materials such as direct reflection film, diffuse reflection film.Its reflectivity generally requires greater than 98%.
The liquid crystal display optical fiber backlight that adopts the utility model scheme to make, manufacture craft is simple, and cost is low.Volume is little, and is low in energy consumption.Surface-brightening is even, does not produce electromagnetic interference (EMI), can full-colorly show.Can be widely used in fields such as the illumination of LCD LCD backlight source, thin film switch, medicine equipment.
Description of drawings
Fig. 1 annotates light back light source structure synoptic diagram for single face;
Fig. 2 is two-sided notes light back light source structure synoptic diagram.
Embodiment
It is 4 centimetres plastic optical fiber silk that light transmitting fiber 5 adopts φ=0.5 millimeter, length, and totally 60, an end be circular by the sleeve pipe boundling of φ 5, the other end by holder locate be arranged in linear.Circular boundling end and 5 millimeters White LED illuminating sources 1 of φ are coupled, light guide plate 3 couplings of wire end and 3.5 inch 0.8 millimeters thick.Do reflective membrane 4 with the direct reflection membraneous material, vaporific polyester material is done even light film 2, and the backlight that makes is of a size of 3.5 inches.After testing, this backlight surface brightness is a 72cd/ rice
2, the maximal value of surface brightness compares less than 1.2 with minimum value, and power consumption is 0.07 watt.
Claims (8)
1, liquid crystal display optical fiber backlight, constitute by lamp source (1), even light film (2), light guide plate (3), reflective membrane (4), it is characterized in that: the light transmitting fiber between lamp source and light guide plate (5), an end and lamp source (1) coupling, the other end and light guide plate (3) side is coupled.
2, liquid crystal display according to claim 1 optical fiber backlight is characterized in that: light transmitting fiber (5) is circular with an end boundling of lamp source (1) coupling, and an end that is coupled with light guide plate (3) is arranged in linear.
3, liquid crystal display according to claim 1 and 2 optical fiber backlight is characterized in that: light transmitting fiber (5) is one of following mode with the coupling scheme of light guide plate (3): 1) side coupling; 2) Dui Ying both sides are coupled simultaneously.
4, liquid crystal display according to claim 1 optical fiber backlight is characterized in that: lamp source (1) is the LED light emitting diode, and color is a white or colored.
5, liquid crystal display according to claim 1 optical fiber backlight is characterized in that: light transmitting fiber (5) is PS plastic optical fiber silk or PMMS plastic optical fiber silk, and diameter is from 0.1-1.0mm.
6, liquid crystal display according to claim 1 optical fiber backlight is characterized in that: light guide plate (3) material is polycarbonate light guide plate or organic glass light guide plate, and its thickness is from 0.5-4.0mm.The size of light guide plate is from 1.5～17 inches.
7, liquid crystal display according to claim 1 optical fiber backlight is characterized in that: even light film (2) can adopt vaporific mylar and can be with the plastic film material of light scatter.
8, liquid crystal display according to claim 1 optical fiber backlight is characterized in that: its reflectance coating (4) adopts direct reflection film or diffuse reflection membraneous material, and its reflectivity is greater than 98%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320120701 CN2687711Y (en) | 2003-12-16 | 2003-12-16 | Optical fiber back light source for liquid crystal display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320120701 CN2687711Y (en) | 2003-12-16 | 2003-12-16 | Optical fiber back light source for liquid crystal display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2687711Y true CN2687711Y (en) | 2005-03-23 |
Family
ID=34661947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320120701 Expired - Fee Related CN2687711Y (en) | 2003-12-16 | 2003-12-16 | Optical fiber back light source for liquid crystal display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2687711Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9726801B2 (en) | 2014-11-10 | 2017-08-08 | Boe Technology Group Co., Ltd. | Backlight unit and a display device |
| US9810829B2 (en) | 2015-03-26 | 2017-11-07 | Boe Technology Group Co., Ltd. | Backlight module, having a deformable layer, display module and display device |
| US10156753B2 (en) | 2015-08-10 | 2018-12-18 | Boe Technology Group Co., Ltd. | Backlight module and display device |
| US10571684B2 (en) | 2015-07-17 | 2020-02-25 | Boe Technology Group Co., Ltd. | Micro-mirror array having pillars which form portions of electrical paths between mirror electrodes and mirrors |
-
2003
- 2003-12-16 CN CN 200320120701 patent/CN2687711Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9726801B2 (en) | 2014-11-10 | 2017-08-08 | Boe Technology Group Co., Ltd. | Backlight unit and a display device |
| US9810829B2 (en) | 2015-03-26 | 2017-11-07 | Boe Technology Group Co., Ltd. | Backlight module, having a deformable layer, display module and display device |
| US10571684B2 (en) | 2015-07-17 | 2020-02-25 | Boe Technology Group Co., Ltd. | Micro-mirror array having pillars which form portions of electrical paths between mirror electrodes and mirrors |
| US10156753B2 (en) | 2015-08-10 | 2018-12-18 | Boe Technology Group Co., Ltd. | Backlight module and display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050323 Termination date: 20121216 |