CN201812127U - Super-mini projector module - Google Patents
Super-mini projector module Download PDFInfo
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- CN201812127U CN201812127U CN2010202377368U CN201020237736U CN201812127U CN 201812127 U CN201812127 U CN 201812127U CN 2010202377368 U CN2010202377368 U CN 2010202377368U CN 201020237736 U CN201020237736 U CN 201020237736U CN 201812127 U CN201812127 U CN 201812127U
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- dbef
- polarized light
- light
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- diaphragm
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Abstract
The utility model provides a projector module which comprises a light supply device, a polarization modulation device and a projection objective lens. The projector module is characterized in that the polarization modulation device comprises a pre-polarization device, a dual brightness enhancement film (DBEF) and a liquid crystal on silicon (LCoS) reflection-type micro-display chip, wherein the pre-polarization device is set to receive light from the light supply device and convert the light into S-type polarized light; the dual brightness enhancement film (DBEF) is set to receive and reflect the S-type polarized light from the pre-polarization device; and the LCoS reflection-type display micro-display chip is set to receive the S-type polarized light reflected by the DBEF, converts the S-type polarized light into the P-type polarized light while modulating the S-type polarized light according to the image information displayed by the LCoS reflection-type micro-display chip, and reflects the P-type polarized light to the projection objective lens through the DBEF. By adopting the DBEF, the utility model has the advantages that the size of the projector module is effectively reduced; the structure of the optical machine is more compact; and the cost of the projector module is reduced. Therefore, the projector module lays the foundation for the application of mobile phones and other handheld equipment.
Description
Technical field
The invention belongs to liquid crystal on silicon LCoS (liquid-crystal on silicon) little projection display technique field, particularly relate to the microminiature projection ray machine that a kind of use DBEF (enhancement mode reflection diaphragm) and pre-polarizer combination replace traditional polarising beam splitter.
Background technology
Along with increasing digital media content is integrated in the handheld mobile device, the demonstration of information also is subjected to the restriction of mobile device size more, becomes the bottleneck that media content is propagated.Have only 4 inches as the fixed measure LCD display maximum of equipment such as mobile phone, resolution is QVGA, this resolution limit the display effect of high-definition digital signal.For addressing this problem, high-resolution micro projection ray machine will be a kind of ideal scheme of dissolving contradiction between the rich and handheld device miniaturization of displaying contents.In recent years, the little projection display technique development of liquid crystal on silicon (LCoS) was extremely rapid, had advantages such as high resolving power, high definition, portability because of it, became a kind of extremely welcome Projection Display mode.Being used of solid light source such as little display technique of LCoS and LED, laser cause the volume of projection module more and more littler, and may be used in the middle of the handheld devices such as mobile phone.
For this class projection module, less ray machine volume and higher optical efficiency are its key indexs.A kind of traditional little projection ray machine as shown in Figure 1, light beam directly projects on the LCoS chip 2 after entering polarising beam splitter (PBS) 1, enters projection lens through LCoS chip 2 modulation back reflections.The PBS of this design generally uses the polarising beam splitter of Macneille principle, and the PBS of Macneille requires incident light to become the configurations of 45 degree and beam splitting plane and emergent light also will hope for success with the beam splitting plane 45 to spend and dispose.Require this kind PBS that the angle of divergence of incident light is less than 10 degree in order to reach certain extinction ratio simultaneously.Such requirement makes that light source is vertical with projecting light path when the design ray machine, the inevitable like this volume that strengthens whole ray machine.The requirement of using volume for mobile phone is primary often, is the design that several millimeters improvement will make things convenient for integral product greatly sometimes.
If will reduce the volume of little throwing module, enlarge its range of application, just must on the basis that guarantees optical efficiency, use new optical element and design.
Summary of the invention
Content of the present invention is to provide a kind of microminiature projector module, and it is little, simple in structure that it has a volume, and picture quality is good, low cost and other advantages.
In order to realize described purpose, projector provided by the utility model module comprises:
(1) for projector's module provide light source for electro-optical device;
(2) be used to accept to confess the light of electro-optical device and be converted into the S polarized light and play offset system device what the S polarized light was modulated; With
(3) be provided for accepting from the light that plays offset system device and the projection objective of projection imaging;
It is characterized in that described offset system device comprises:
Be provided to receive the light of confessing electro-optical device and be converted into the pre-polarizer of the direction of vibration linearly polarized light vertical (S polarized light) with incident direction;
Be provided to be used to receive and reflect enhancement mode reflective polarizers (DBEF diaphragm) from the S polarized light of the pre-polarizer; With
Be provided to be used to receive S polarized light that the enhancement mode reflective polarizers reflected and the silicon base liquid crystal reflective micro display chip of the S polarized light being modulated according to image information (LCos), wherein said silicon base liquid crystal reflective micro display chip also is converted to the S polarized light P polarized light and sees through the DBEF diaphragm P polarized light is reflexed to projection objective.
In the projector of the present utility model module, can also comprise a position adjusting mechanism, be provided to be used to regulate the angle position of described DBEF diaphragm and the pre-polarizer and DBEF diaphragm and silicon base liquid crystal reflective micro display chip.
In the projector of the present utility model module, described silicon base liquid crystal reflective micro display chip (LCos) can be positioned on the reflection direction of S polarized light of DBEF diaphragm and with the DBEF diaphragm and become 45 degree to be provided with.Preferably, the angle between the light direction of the described pre-polarizer and the DBEF diaphragm plane is set up smaller or equal to 45 degree, is more preferably less than 45 degree, and is preferred, is 30 degree, to reduce the volume of whole projector module.
The described pre-polarizer can also can be curved surface for the plane, and preferably curved surface is to reduce the volume of projector's module.
In the utility model, the colored micro display chip of described silicon base liquid crystal reflective can have miniature separating filter array.
According to an embodiment, the described electro-optical device that supplies comprises:
Led light source;
Be provided to be used to receive from the natural light of light source and with the collimation lens of equalizing light rays.
Preferably, described led light source is the led light source that white LED light source or red, blue, green three-color LED are formed.
In the prior art, enhancement mode reflective polarizers (DBEF diaphragm) principle of work is a light vertical incidence DBEF membrane surface, and P light can directly see through the DBEF diaphragm, but most S light can be by DBEF diaphragm reflected back light source.As shown in Figure 2, the DBEF diaphragm is mainly used in the module backlight of LCD TV in the prior art, plays the effect that improves the polarized light transformation efficiency.As shown in Figure 2, DBEF is placed between LCD and the backlight, the light of backlight emission is behind the DBEF membrane surface, directly used by LCD TV behind the P light transmission, and S light is reflected back toward backlight, behind the backlight layers of material, S light is by depolarization, this Shu Guang again from backlight surface outgoing, is recycled and is used after the mirror reflects of backlight bottom, thereby has improved the utilization ratio of backlight.
But, in projector of the present utility model module, having overcome in the prior art DBEF diaphragm must the prejudice vertical with incident ray, utilize the DBEF diaphragm to have the character at higher S light reflection angle and P transmittance angle, the DBEF diaphragm can be become 45 degree to place with the LCoS chip, thus and can be the volume that the optic angle degree is designed to reduce less than 45 degree ray machine that advances of DBEF diaphragm.After adding the pre-polarizer, can obtain the contrast close with Macneille PBS.
The present invention uses the DBEF diaphragm and the pre-polarizer to replace PBS, thereby makes ray machine compact more, has reduced the volume of module, and has obtained the better image brightness and contrast.
Description of drawings
Fig. 1 is a traditional projection ray machine synoptic diagram;
Fig. 2 is the synoptic diagram that traditional DBEF diaphragm and LCD are used; Wherein, 11 refer to no Vikuiti
TMThe traditional backlight source of DBEF film shows that 12 refer to application Vikuiti
TMDBEF II film strengthens demonstration, and 13 is upper polarizer, and 14 is LCD, and 15 are following polaroid, and 16 is Vikuiti
TMThe DBEFII film;
Fig. 3 is embodiment of microminiature projector's module of the present utility model;
Fig. 4 is the overall appearance figure of an embodiment of the present utility model;
Fig. 5 is the overall appearance figure of an embodiment of the present utility model.
Embodiment
Elaborate the present invention below in conjunction with accompanying drawing, but do not limit content of the present invention.
Shown in Figure 3 is an embodiment of microminiature projection module of the present utility model.This device comprises led light source 3, collimation lens 4, the pre-polarizer 5, silicon base liquid crystal reflective micro display chip 6 (LCoS), enhancement mode reflective polarizers 7 (DBEF diaphragm) and projection objective 8.
The colored micro display chip 6 of silicon base liquid crystal reflective can be the colored micro display chip of the silicon base liquid crystal reflective that has miniature color separation filter described in Chinese patent No.01113471.2 and the No.02217356.0.
Enhancement mode reflective polarizers 7 is Vikuiti of 3M
TMDBEF blast sheet.
Become the direction of vibration S polarized light vertical with the plane of incidence behind the natural light process collimation lens 4 of led light source 3 outgoing, the pre-polarizer 5, the angle of divergence of this S polarized light can be the 5-45 degree, preferably 15 degree.The pre-polarizer can also can be curved surface for the plane, and preferably curved surface is to reduce the ray machine volume.This bundle S polarized light with the directions of DBEF diaphragm 7 plane included angles smaller or equal to 45 degree, preferably 30 spend, being projected to DBEF diaphragm 7 is reflected and enters and LCoS chips 6 that 7 one-tenth 45 on DBEF diaphragm degree is provided with, through becoming direction of vibration and original vertical P light after 6 modulation of LCoS chip, see through DBEF diaphragm 7 and enter projection objective 8 thereby reflection is direct.
Be to add in the display system effect of the pre-polarizer, the performance of ray machine under the condition of the pre-polarizer is listed and do not had to following table.
Fig. 4 and Fig. 5 are overall appearance figure of the present invention, can see compact conformation, and volume is small and exquisite.
The present invention has following income effect: compare with background technology, the present invention breaks through the tradition that original DBEF diaphragm and LCD are used, become 45 to place with the LCoS chip DBEF diaphragm, thereby replaced the bigger PBS of volume, increase the contrast that the pre-polarizer has improved image, in the volume that has greatly reduced module, keep picture quality, made the structure of little throwing module compacter, reduced production cost.
Claims (9)
1. projector's module comprises:
(1) for projector's module provide light source for electro-optical device;
(2) be used to accept to confess the light of electro-optical device and be converted into the S polarized light and play offset system device what the S polarized light was modulated; With
(3) be provided for accepting from rise offset system device through the light of ovennodulation and the projection objective of projection imaging;
It is characterized in that described offset system device comprises:
Be provided to receive the light of confessing electro-optical device and with the pre-polarizer of its conversion S polarized light;
Be provided to be used to receive and reflect DBEF diaphragm from the S polarized light of the pre-polarizer; With
Be provided to be used to receive the silicon base liquid crystal reflective micro display chip of the S polarized light that the enhancement mode reflective polarizers reflected, when wherein said silicon base liquid crystal reflective micro display chip is modulated the S polarized light according to itself shown image information, the S polarized light is converted to the P polarized light, and the P polarized light is reflexed to projection objective through the DBEF diaphragm.
2. projector according to claim 1 module is characterized in that also comprising a position adjusting mechanism, is provided to be used to regulate between the described DBEF diaphragm and the pre-polarizer and the angle between DBEF diaphragm and the silicon base liquid crystal reflective micro display chip.
3. projector according to claim 1 and 2 module is characterized in that described silicon base liquid crystal reflective micro display chip is positioned on the exit direction of S polarized light of DBEF diaphragm and with the DBEF diaphragm and becomes 45 degree to be provided with.
4. projector according to claim 3 module is characterized in that the light direction of the described pre-polarizer and the angle between the DBEF diaphragm plane are set to less than or equal 45 degree.
5. projector according to claim 4 module is characterized in that the light direction of the described pre-polarizer and the angle between the DBEF diaphragm plane are 30 degree.
6. projector according to claim 1 and 2 module is characterized in that the described pre-polarizer is for for curved surface.
7. projector according to claim 1 and 2 module is characterized in that the described electro-optical device that supplies comprises: led light source; With
Be provided to be used to receive from the natural light of led light source and with the collimation lens of equalizing light rays.
8. projector according to claim 7 module is characterized in that described led light source is the led light source that white LED light source or red, blue, green three-color LED are formed.
9. projector according to claim 1 and 2 module is characterized in that, the colored micro display chip of described silicon base liquid crystal reflective has miniature separating filter array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202377368U CN201812127U (en) | 2010-06-25 | 2010-06-25 | Super-mini projector module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202377368U CN201812127U (en) | 2010-06-25 | 2010-06-25 | Super-mini projector module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201812127U true CN201812127U (en) | 2011-04-27 |
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ID=43895067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202377368U Expired - Fee Related CN201812127U (en) | 2010-06-25 | 2010-06-25 | Super-mini projector module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201812127U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235471A (en) * | 2013-04-18 | 2013-08-07 | 深圳市长江力伟股份有限公司 | LCOS (liquid crystal on silicon) projection light machine |
| WO2022022240A1 (en) * | 2020-07-28 | 2022-02-03 | 宁波舜宇光电信息有限公司 | Projection module and assembly method therefor, and near-eye display apparatus comprising projection module |
-
2010
- 2010-06-25 CN CN2010202377368U patent/CN201812127U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235471A (en) * | 2013-04-18 | 2013-08-07 | 深圳市长江力伟股份有限公司 | LCOS (liquid crystal on silicon) projection light machine |
| WO2022022240A1 (en) * | 2020-07-28 | 2022-02-03 | 宁波舜宇光电信息有限公司 | Projection module and assembly method therefor, and near-eye display apparatus comprising projection module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170407 Address after: Hongkong Wan Chai Road No. 66 notice China Pico building 18 floor Patentee after: Vision technology (Hongkong) Co., Ltd. Address before: Hongkong Wan Chai Road No. 66 notice China Pico building 18 floor Patentee before: Iview Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20190625 |