CN2492924Y - Back projecting display equipment using LED as light source - Google Patents
Back projecting display equipment using LED as light source Download PDFInfo
- Publication number
- CN2492924Y CN2492924Y CN 01228947 CN01228947U CN2492924Y CN 2492924 Y CN2492924 Y CN 2492924Y CN 01228947 CN01228947 CN 01228947 CN 01228947 U CN01228947 U CN 01228947U CN 2492924 Y CN2492924 Y CN 2492924Y
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- Prior art keywords
- liquid crystal
- crystal display
- display board
- light
- blue
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- Expired - Fee Related
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- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 57
- 239000011159 matrix material Substances 0.000 claims abstract description 22
- 239000012528 membrane Substances 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Projection Apparatus (AREA)
Abstract
The utility model relates to a rear projection display apparatus which uses a light emitting diode as a luminaire. The utility model is provided with a liquid crystal display control circuit which is respectively connected with a red liquid crystal display panel, a green liquid crystal display panel and a blue liquid crystal display panel. The red liquid crystal display panel, the green liquid crystal display panel and the blue liquid crystal display panels are arranged on the under, behind and above a prismatic with a half-reflecting membrane. The rear sides of the red liquid crystal display panel, the blue liquid crystal display panel and the green liquid crystal display panels are respectively provided with single-color light emitting diode matrix plates of red light, blue light and green light. The rear projection display apparatus is characterized in that the complicated degree of the device is simplified, a complicated light splitting system is avoided, and the total cost is low. The rear projection display apparatus increases the reliability and constancy because the single-color light emitting diode luminaire has the service life of 100 thousands of hours.
Description
The utility model belongs to back projection display apparatus, and particularly a kind of light emitting diode is the back projection display apparatus of light source.
At present in the back projection display apparatus, as shown in Figure 1, liquid crystal display LCOS control circuit is arranged, liquid crystal display control circuit connects red liquid crystal display board R-LCOS respectively, green liquid crystal display board G-LCOS and blue liquid crystal display board B-LCOS, the red liquid crystal display board, green liquid crystal display board and blue liquid crystal display board are separately positioned on the following of the transmission of the complexity with half reflection film and reflecting prism group, after, the top, complicated transmission and the place ahead of reflecting prism group are projection lens, because back projection display apparatus needs the intensity of light source bigger, therefore the light source of general using is mainly the UHP light source, and traditional short arc ultrahigh pressure mercury lamp, the red liquid crystal display board, green liquid crystal display board and blue liquid crystal display board demand side light source, and these light sources are not area sources, also need these light sources are cooperated the reflection shield lens, and to complicated spectroscope be red with the white light beam split, green, blue three kinds of light, with the red liquid crystal display board, green liquid crystal display board and blue liquid crystal display board cooperate, owing to limited by manufacture craft and cost, the serviceable life of this light source is also shorter at present, and production technology is very complicated, has been not suitable for using in extensive industrialization product.
The purpose of this utility model provides the back projection display apparatus that a kind of light emitting diode is a light source, and the serviceable life that overcomes light source in the back projection display apparatus of prior art is shorter, the shortcoming and defect of complex manufacturing.Reach and change little with life-span height, light intensity height, light uniformity coefficient, colour temperature.
The purpose of this utility model is achieved in that
A kind of light emitting diode is the back projection display apparatus of light source, liquid crystal display control circuit is arranged, liquid crystal display control circuit connects the red liquid crystal display board respectively, green liquid crystal display board and blue liquid crystal display board, the red liquid crystal display board is arranged on the below of the prism with half reflection film, the green liquid crystal display board is arranged on the rear of the prism with half reflection film, the blue liquid crystal display board is arranged on the top of the prism with half reflection film, the place ahead with prism of half reflection film is a projection lens, it is characterized by: the rear side of red liquid crystal display board is monochromatic red light-emitting diode matrix plate, the rear side of blue liquid crystal display board is a ultra-blue-light dot matrix LEDs plate, the rear side of green liquid crystal display board is monochromatic green light LED matrix plate.The dot matrix LEDs plate is the dot matrix LEDs of arranging with matrix form on circuit board, and all the light emitting diodes resistance that respectively is connected in series is connected in parallel on the power supply at whole light emitting diodes that will be in series with resistance.
Prism with half reflection film is the equilateral prism in right angle, and the half reflection film is arranged on the hypotenuse face.
The utility model has the advantages that:
The simplified system complexity is directly used monochromatic source incident LCOS, has avoided the beam splitting system of complexity in the system, and reduce overall cost cost: the life-span of monochromatic LED, can reach 100,000 hours its serviceable life far above the UHP light source, is more suitable in back projection display apparatus; Utilize monochromatic LED to do light source, alternative original mechanical part in the part back projection display apparatus, the reliability and the stability of raising system; With the three-sheet type LCOS back projection display apparatus is example, utilize light emitting diode (LED) to replace conventional light source for light source, can reduce the reliability of producting process difficulty, cost cost and the system of various back projection display apparatus greatly, therefore can be widely used in every back projection display apparatus technology such as FLCD, LCOS of one chip, three-chip type.
Below in conjunction with description of drawings embodiment:
Fig. 1 is that UHP is the back projection display apparatus structural drawing of light source
Fig. 2 is that light emitting diode is the back projection display apparatus structural drawing of light source
Fig. 3 is light emitting diode (LED) light source matrix plate structure front elevation
Fig. 4 is light emitting diode (LED) light source matrix plate structure rear view
Figure is light emitting diode (LED) light source matrix plate circuit diagram
A kind of light emitting diode shown in Figure 2 is the back projection display apparatus of light source, existing liquid crystal display LCOS control circuit 1 is arranged, liquid crystal display control circuit connects existing red liquid crystal display board R-LCOS 2 respectively, green liquid crystal display board G-LCOS 3 and blue liquid crystal display board B-LCOS 4, the red liquid crystal display board is arranged on the below of the prism 5 with half reflection film, the green liquid crystal display board is arranged on the prism 5 with half reflection film, 6 rear, the blue liquid crystal display board is arranged on the top of the prism 6 with half reflection film, the place ahead with prism of half reflection film is a projection lens 7, and the rear side of red liquid crystal display board is monochromatic red light-emitting diode matrix plate R-LED 8, the rear side of blue liquid crystal display board is ultra-blue-light dot matrix LEDs plate B-LED 9, the rear side of green liquid crystal display board is monochromatic green light LED matrix plate G-LED 10.
Shown in Fig. 3,4,5 structure and the circuit diagram of dot matrix LEDs plate.It is dot matrix LEDs LED1 one LED100 that arranges with matrix form on circuit board, and all the light emitting diodes resistance R 1-R100 that respectively is connected in series is connected in parallel on the power supply VCC at whole light emitting diodes that will be in series with resistance.
Claims (2)
1, a kind of light emitting diode is the back projection display apparatus of light source, liquid crystal display control circuit is arranged, liquid crystal display control circuit connects the red liquid crystal display board respectively, green liquid crystal display board and blue liquid crystal display board, it is characterized by: the red liquid crystal display board is arranged on the below of the prism with half reflection film, the green liquid crystal display board is arranged on the rear of the prism with half reflection film, the blue liquid crystal display board is arranged on the top of the prism with half reflection film, the place ahead with prism of half reflection film is a projection lens, and the rear side of red liquid crystal display board is monochromatic red light-emitting diode matrix plate, the rear side of blue liquid crystal display board is a ultra-blue-light dot matrix LEDs plate, the rear side of green liquid crystal display board is monochromatic green light LED matrix plate.
2, light emitting diode according to claim 1 is the back projection display apparatus of light source, it is characterized by: the dot matrix LEDs plate is the dot matrix LEDs of arranging with matrix form on circuit board, all the light emitting diodes resistance that respectively is connected in series is connected in parallel on the power supply at whole light emitting diodes that will be in series with resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01228947 CN2492924Y (en) | 2001-06-25 | 2001-06-25 | Back projecting display equipment using LED as light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01228947 CN2492924Y (en) | 2001-06-25 | 2001-06-25 | Back projecting display equipment using LED as light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2492924Y true CN2492924Y (en) | 2002-05-22 |
Family
ID=33643917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01228947 Expired - Fee Related CN2492924Y (en) | 2001-06-25 | 2001-06-25 | Back projecting display equipment using LED as light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2492924Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252225B (en) * | 2005-07-15 | 2013-05-29 | 三星电子株式会社 | Surface light source using led and backlight unit having the surface light source |
-
2001
- 2001-06-25 CN CN 01228947 patent/CN2492924Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102252225B (en) * | 2005-07-15 | 2013-05-29 | 三星电子株式会社 | Surface light source using led and backlight unit having the surface light source |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANJIN UNIVERSITY Free format text: FORMER OWNER: KOU JISUNG Effective date: 20060804 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20060804 Address after: 300072 Nankai District Wei Jin Road, Tianjin City 92 Patentee after: Tianjin University Address before: 300384 Tianjin New Technology Industrial Park Huayuan Industrial District Road No. 3 Alex Hua Tian Sun Mingtao Patentee before: Kou Jisong |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |