CN104991413A - Projection system - Google Patents
Projection system Download PDFInfo
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- CN104991413A CN104991413A CN201510434231.8A CN201510434231A CN104991413A CN 104991413 A CN104991413 A CN 104991413A CN 201510434231 A CN201510434231 A CN 201510434231A CN 104991413 A CN104991413 A CN 104991413A
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- light
- light source
- shifter
- projection system
- optical projection
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Abstract
The invention relates to a projection system comprising a light source, a projection screen, a projector, and a control module. The projection screen is provided with a stacked structure composed of a light switching device and a light absorption layer, and the light switching device faces towards the light source side. The control module is electrically connected with the light source and the light switching device of the projection screen to synchronously control on-off of the light source and the switching frequency of the light switching device. Thus, a projection picture with high display contrast and saturation can still be obtained under a bright ambient light source.
Description
Technical field
The present invention has about a kind of optical projection system, still has the optical projection system of good contrast effect under being particularly to a kind of environment higher in brightness.
Background technology
The projection screen of known projection arrangement belongs to non-immediate penetration backlight, itself not luminous with generation image, and need by projector image on projection screen, and scattering with reflex to user's eyes with imaging, therefore, light source beyond projector also may expose on projection screen, and the image quality of the required viewing of impact, therefore under generally must being in darker environment during use projection arrangement, to obtain preferably display comparison and color saturation, but darker environment easily causes user to read, inconvenience when walking about or must process other affairs simultaneously, if desired under being in again comparatively bright environment, such as use known projection arrangement in the unlatching indoor of light source or the outdoor occasion on daytime, then (color washout) is easily turned white in display frame, display comparison and color saturation is caused to decline to a great extent, and make viewing bad, for this shortcoming, the general mode that only can adopt the luminous flux increasing projection light source, or adopt the projection screen of more high-gain values, effectively brightness is projected to increase, but these modes all additionally can increase energy loss and projector equipment cost, and still only relatively can reduce the impact of environment light source and display frame that environment light source causes cannot be avoided completely to turn white situation.
Therefore the present invention proposes a kind of optical projection system, it under brighter environment light source, can have better display comparison and color saturation.
Summary of the invention
Because the problem of above-mentioned prior art, the object of the present invention is to provide a kind of optical projection system possessing the patent requirements such as novelty, progressive and industry applications, use to overcoming existing product under brighter environment light source, there is display frame easily to turn white, the difficult point that display comparison and color saturation decline to a great extent.
For achieving the above object, the invention provides a kind of optical projection system; In a preferred embodiment, this optical projection system comprises: light source, in order to provide user environment light source; Projection screen, it has the stepped construction of light shifter and light-absorption layer, and wherein, this light shifter is for being intended for this light source side; Projector, in order to project image in this projection screen; And control module, it is electrically connected the light shifter of this light source and this projection screen, and with the switching frequency of the switch of this light source of synchro control and this light shifter, this switching frequency is 60Hz to 1000Hz; Wherein, when this light source is opened, this light shifter is the clear state penetrated; When this light source is closed, this light shifter is the opaque state of scattering.
In the optical projection system of an embodiment, this light shifter of this projection screen is polymer dispersion type liquid crystal device, polarization type light modulating device or refraction type light modulating device.
In the optical projection system of another embodiment, this light source is light emitting diode or Organic Light Emitting Diode.
In the optical projection system of another embodiment, the reflectivity of the light-absorption layer of this projection screen is 1% to 20%.
In the optical projection system of another embodiment, this control module is electrically connected on this projector further, and when this light source is opened, this projector can close synchronously.
In the optical projection system of another embodiment, this light shifter is polymer dispersion type liquid crystal device, and when this light source is closed, the synchronous power-off of this polymer dispersion type liquid crystal in this light shifter switches to lack of alignment state, and in the opaque state for scattering; When this light source is opened, this polymer dispersion type liquid crystal in this light shifter is synchronously energized and switches to ordered arrangement state, and in penetrating the clear state of light.
Compared with prior art, optical projection system of the present invention makes light source and light shifter with frequency synchronism switching rapidly by control module, when projector uses in comparatively bright indoor environment light source, effectively can improve display comparison and the color saturation of projected picture, and then promote the display quality of projected picture.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the optical projection system of one embodiment of the invention;
Fig. 2 a and Fig. 2 b is optical projection system action principle schematic diagram of the present invention;
Fig. 3 is the time diagram of the control module of the optical projection system of one embodiment of the invention.
Embodiment
More easily understand for making inventive features of the present invention, content and advantage and the effect that can reach thereof, hereby the present invention is coordinated accompanying drawing, and be described in detail as follows with the expression-form of embodiment, and it is wherein used graphic, its purport is only the use of signal and aid illustration book, may not be actual proportions after the invention process and precisely configure, therefore should with regard to appended graphic ratio and configuration relation is not understood, the interest field limited the invention in actual enforcement, conjunction is first chatted bright.
Hereinafter with reference to correlative type, the embodiment according to single plane fluoroscopy windows system of the present invention is described, for making to be convenient to understand, the similar elements in following embodiment illustrates with identical symbology.
Shown in Fig. 1, the invention provides a kind of optical projection system 1; In a preferred embodiment, optical projection system 1 comprises: light source 2, in order to provide user environment light source; Projection screen 3, it has the stepped construction of light shifter 31 and light-absorption layer 32, and wherein, light shifter 31 is for being intended for light source 2 side; Projector 4, in order to project image in projection screen 3; And control module 5, the light shifter 31 of its electrical connection light source 2 and projection screen 3, with the switching frequency of the switch of synchro control light source 2 and light shifter 31, switching frequency is 60Hz to 1000Hz; Wherein, when light source 2 is opened, the clear state of light shifter 31 for penetrating; When light source 2 is closed, light shifter 31 is the opaque state of scattering.
In the optical projection system of an embodiment, the light shifter 31 of projection screen 3 is polymer dispersion type liquid crystal (PDLC) device, polarization type light modulating device or refraction type light modulating device.
Please referring again to shown in Fig. 2 a and Fig. 2 b, it is the optical projection system principle schematic of one embodiment of the invention, to adopt polymer dispersion type liquid crystal device as light shifter 31, when user needs to use projector 4 under brighter indoor environment light source, make light source 2 and light shifter 31 can frequency synchronism switching rapidly by control module 5, please more in the lump referring to the time diagram of Fig. 3, at the time point t2 that light source 2 is closed, the synchronous power-off of polymer dispersion type liquid crystal in light shifter 31 switches to lack of alignment state, and in the opaque state for scattering, make projector 4 be projeced into projection screen 3 image do not whiten by the impact of light source 2, at the time point t1 that light source 2 is opened, polymer dispersion type liquid crystal in light shifter 31 is synchronously energized and switches to ordered arrangement state, and in penetrating the clear state of light, the image that the light that light source 2 is sent and projector 4 project can penetrate this light shifter 31, the light-absorption layer 32 being projected curtain 3 absorbs and shows black picture, what control that the switching frequency of module 5 exceedes human eye vision can identification speed, therefore can obtain and open as light source 2, the display comparison of projected picture and the effect of color saturation can not be affected again.
In the optical projection system of another embodiment, light source 2 is light emitting diode or Organic Light Emitting Diode, to possess the switch speed of quick On/Off.
In the optical projection system of another embodiment, the reflectivity of the light-absorption layer 32 of projection screen 3 is 1% to 20%, and the light of penetrating light switching device shifter 31 is not easily reflexed in user's eye again.
In the optical projection system of another embodiment, control module 5 and be electrically connected on projector 4 further, when light source 2 is opened, the projection source of projector 4 also can close synchronously with energy-conservation.
Above-described embodiment is only and technological thought of the present invention and feature is described, its object understands content of the present invention implementing according to this enabling the personage haveing the knack of this skill, when can not with restriction the scope of the claims of the present invention, namely the equalization generally done according to disclosed spirit changes or modifies, and must be encompassed in the scope of the claims of the present invention.
Claims (6)
1. an optical projection system, is characterized in that, this optical projection system comprises:
Light source, it is in order to provide user environment light source;
Projection screen, it is the stepped construction with light shifter and light-absorption layer, and this light shifter is for being intended for this light source side;
Projector, it is in order to project image in this projection screen; And
Control module, it is electrically connected this light shifter of this light source and this projection screen, and with the switching frequency of the switch of this light source of synchro control and this light shifter, this switching frequency is between 60Hz to 1000Hz;
Wherein, when this light source is opened, this light shifter is the clear state penetrated; When this light source is closed, this light shifter is the opaque state of scattering.
2. optical projection system as claimed in claim 1, it is characterized in that, this light shifter of this projection screen is polymer dispersion type liquid crystal device, polarization type light modulating device or refraction type light modulating device.
3. optical projection system as claimed in claim 1, it is characterized in that, this light source is light emitting diode or Organic Light Emitting Diode.
4. optical projection system as claimed in claim 1, it is characterized in that, the reflectivity of this light-absorption layer of this projection screen is 1% to 20%.
5. optical projection system as claimed in claim 1, it is characterized in that, this control module is electrically connected this projector further, when this light source is opened, this projector's close synchronously.
6. optical projection system according to claim 1, it is characterized in that, this light shifter is polymer dispersion type liquid crystal device, when this light source is closed, the synchronous power-off of this polymer dispersion type liquid crystal in this light shifter switches to lack of alignment state, and in the opaque state for scattering; When this light source is opened, this polymer dispersion type liquid crystal in this light shifter is synchronously energized and switches to ordered arrangement state, and in penetrating the clear state of light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510434231.8A CN104991413A (en) | 2015-07-22 | 2015-07-22 | Projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510434231.8A CN104991413A (en) | 2015-07-22 | 2015-07-22 | Projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104991413A true CN104991413A (en) | 2015-10-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510434231.8A Pending CN104991413A (en) | 2015-07-22 | 2015-07-22 | Projection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104991413A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340741A (en) * | 2017-08-04 | 2017-11-10 | 常州大学 | For dimming the control system and control method of projection film |
| CN108777119A (en) * | 2018-06-01 | 2018-11-09 | 深圳安麦思科技有限公司 | Power supply regulator control system |
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| US6600600B2 (en) * | 2000-08-14 | 2003-07-29 | Cid, Inc. | Projection screen and projection method |
| JP4083191B2 (en) * | 2003-05-26 | 2008-04-30 | シャープ株式会社 | Reflective screen |
| WO2009040975A1 (en) * | 2007-09-25 | 2009-04-02 | Sharp Kabushiki Kaisha | Screen |
| CN101622865A (en) * | 2007-02-28 | 2010-01-06 | 皇家飞利浦电子股份有限公司 | Image display apparatus, and disguising device |
| CN101950119A (en) * | 2009-05-18 | 2011-01-19 | 吴小平 | Optical pulse projection and display technology as well as projector and screen manufactured by using same |
| US20120140147A1 (en) * | 2009-10-09 | 2012-06-07 | Eiji Satoh | Display panel, display system, portable terminal and electronic device |
| CN203225084U (en) * | 2013-04-16 | 2013-10-02 | 深圳市睿擎科技有限公司 | Dual-mode display device |
| JP2014021140A (en) * | 2012-07-12 | 2014-02-03 | Seiko Epson Corp | Screen and image display system |
| CN104685415A (en) * | 2012-09-27 | 2015-06-03 | 三菱化学株式会社 | Image display device |
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2015
- 2015-07-22 CN CN201510434231.8A patent/CN104991413A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6600600B2 (en) * | 2000-08-14 | 2003-07-29 | Cid, Inc. | Projection screen and projection method |
| JP4083191B2 (en) * | 2003-05-26 | 2008-04-30 | シャープ株式会社 | Reflective screen |
| CN101622865A (en) * | 2007-02-28 | 2010-01-06 | 皇家飞利浦电子股份有限公司 | Image display apparatus, and disguising device |
| WO2009040975A1 (en) * | 2007-09-25 | 2009-04-02 | Sharp Kabushiki Kaisha | Screen |
| CN101950119A (en) * | 2009-05-18 | 2011-01-19 | 吴小平 | Optical pulse projection and display technology as well as projector and screen manufactured by using same |
| US20120140147A1 (en) * | 2009-10-09 | 2012-06-07 | Eiji Satoh | Display panel, display system, portable terminal and electronic device |
| JP2014021140A (en) * | 2012-07-12 | 2014-02-03 | Seiko Epson Corp | Screen and image display system |
| CN104685415A (en) * | 2012-09-27 | 2015-06-03 | 三菱化学株式会社 | Image display device |
| CN203225084U (en) * | 2013-04-16 | 2013-10-02 | 深圳市睿擎科技有限公司 | Dual-mode display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340741A (en) * | 2017-08-04 | 2017-11-10 | 常州大学 | For dimming the control system and control method of projection film |
| CN108777119A (en) * | 2018-06-01 | 2018-11-09 | 深圳安麦思科技有限公司 | Power supply regulator control system |
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Application publication date: 20151021 |
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