CN101546106A - Ultra-thin large-screen micro-display rear projection display device - Google Patents
Ultra-thin large-screen micro-display rear projection display device Download PDFInfo
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- CN101546106A CN101546106A CN200810035184A CN200810035184A CN101546106A CN 101546106 A CN101546106 A CN 101546106A CN 200810035184 A CN200810035184 A CN 200810035184A CN 200810035184 A CN200810035184 A CN 200810035184A CN 101546106 A CN101546106 A CN 101546106A
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Abstract
The invention discloses an ultra-thin large-screen micro-display rear projection display device, which relates to the technical field of rear projection display, and aims to solve the technical problem of projection distance of large-screen micro-display rear projection display devices. The micro-display rear projection display device comprises a machine shell, a screen arranged at the front face of the machine shell, as well as an optical engine, a small reflecting mirror and a large reflecting mirror which are arranged in the machine shell, wherein an optical signal emitted by the optical engine is orderly subjected to the reflection of the small reflecting mirror and the large reflecting mirror and finally projects onto the screen; the small reflecting mirror is a small reflecting mirror with an arc surface and is placed under the screen; and the large reflecting mirror is arranged behind the screen and is parallel to the screen. The device has the remarkable characteristic of shortening the projection distance due to adopting the reflection of the small reflecting mirror with the arc surface so as to ensure that the large-screen micro-display rear projection display device is suitable for office fields, video conferences, school multi-media classrooms and home theaters.
Description
Technical field
The present invention relates to the rear-projection display technique, particularly relate to a kind of ultra-thin large-screen micro-display rear projection display device that is applied to office field, video conference, school's multi-media classroom, home theater.
Background technology
Traditional LCD-DLP-LCOS shows, comprise that the porjection type LCD-DLP-LCOS shows and the reflection-type LCD-DLP-LCOS shows, be LCD rear projection display and LCOS, DLP (Digital Micormirror Device, the translations Digital Light Processor) rear projection display generally comprises lamp optical system, coloured light split-optics, electro-optical device, coloured light synthesis system, projection optics system and screen.In little demonstration rear projection display, project on the screen at last by projection optics system after three coloured light (red, green, blue) of separation process electro-optical device and the coloured light synthesis system.
From a structural point, existing LCD-DLP-LCOS display comprises casing, screen, photo engine, small reflector, large reflective mirror, screen is located at the casing front, photo engine, small reflector, large reflective mirror are located in the casing, wherein small reflector tiltedly is located at rear under the screen, and large reflective mirror tiltedly is located at the screen rear; From principle of work, the light signal that photo engine sends is at first thrown to small reflector, and projects on the screen behind two secondary reflections by small reflector and large reflective mirror.Yet, existing little demonstration rear projection display is because big small reflector is plane mirror, in order to correct the trapezoidal distortion that the figure reflection causes, therefore big small reflector is tiltedly established has limitation (promptly greatly on the angle, the angle of cut of little two catoptrons and screen cover is all spent between 37 degree 34), make that large reflective mirror optical axis reflection spot and screen spacing are too big, cause complete machine thickness too thick at last, thereby influence attractive in appearance, simultaneously also taken user's more space area, had a strong impact on the LCD-DLP-LCOS display in the office field, video conference, school's multi-media classroom, and the applying of home theater.
Summary of the invention
At the defective that exists in the above-mentioned prior art, technical matters to be solved by this invention provides the short ultra-thin large-screen micro-display rear projection display device of a kind of projector distance.
In order to solve the problems of the technologies described above, a kind of ultra-thin large-screen micro-display rear projection display device provided by the present invention, comprise casing, be located at the screen in casing front, and be located at photo engine, small reflector, large reflective mirror in the casing, the light signal that described photo engine sends passes through the reflection of small reflector, large reflective mirror successively, project on the screen at last, it is characterized in that: described small reflector is circular arc (non-ball) face small reflector, and be placed on described screen under, large reflective mirror is located at the screen rear, and parallel with screen; Because large reflective mirror and screen be arranged in parallel, therefore need the trapezoidal distortion and the expansion projection angle of circular arc (non-ball) face small reflector with remedial frames, shorten projector distance, the light signal that described photo engine sends is projected on the small reflector, and projects on the screen after the reflection through small reflector and large reflective mirror.
Further, the circular arc of described small reflector (non-ball) face is x
2/ a
2-y
2/ b
2Circular arc (non-ball) face of the hyperbolic-type of=1 (a, b value change and difference according to angle).
Utilize ultra-thin large-screen micro-display rear projection display device provided by the invention,, greatly shortened the light path of photo engine, promptly shortened projector distance, thereby reduced the thickness of rear projection display greatly to giant-screen because small reflector adopts the reflection of circular arc (non-ball) face; Compare with existing technical scheme, the change of small reflector of the present invention and large reflective mirror position and correction trapezoidal distortion mode can reduce the thickness of rear projection display greatly, thereby make the LCD-DLP-LCOS display more attractive in appearance, still less takies user's spatial area.
By the product of the present invention's manufacturing, owing to solved the thick and heavy shortcoming of traditional rear projection display, and adopted brand-new full HD digital display chip, therefore can become genuine dull and stereotyped high definition product.
Table 1 be the thickness, weight ratio of ultra-thin LCD-DLP-LCOS product of the present invention and the common flat panel display product in market than complete list:
| The CRT TV | The tradition projection products | LCD flat panel | Ultra-thin LCD-DLP-LCOS | |
| Display size (inch) | 29 | 51 | 42 | 65 |
| Product thickness (centimetre) | 50 | 55 | 20 | 25 |
| Product weight (kilogram) | 40 | 65 | 30 | 25 |
Because the product that the present invention makes adopts projection pattern, so can significantly not increase under the prerequisite of cost, can make display frame become bigger, and can be full HD demonstration, and traditional rear projection display can't reach full HD resolution, and other flat pannel display mode (as PDP, LCD etc.) of identical display size will reach its price of screen sizes and can significantly increase, and power consumption also can rise by straight line, and the user can't be born.
Table 2 be the diversity ratio of several display modes on price, power consumption.
| The tradition projection products | The PDP TV | LCD flat panel | Ultra-thin LCD-DLP-LCOS | |
| Display size (inch) | 63 | 63 | 65 | 65 |
| Product price (ten thousand yuan) | 1～2 | 6～8 | 12～15 | 2～4 |
| The product power consumption (watt) | 280 | 800 | 600 | 180 |
| Can be full HD | Not | Energy | Energy | Energy |
Can find out that product of the present invention greatly reduces energy consumption in showing that with other product relatively, meet the state basic policy of national energy-conserving and environment-protective, also has the practical value of wideling popularize according to table 2.
In addition,,, realized zero radiation requirement fully, reduced injury, more met modern environmental protection trend, helped domestic consumer's health human body so also there is not X-radiation because back projector display device is full photosystem from small reflector to screen.
In multimedia remote education fields such as video conference, school's multi-media classrooms, IEB (electronic whiteboard) system that can easily add projection receive mode cheaply in the product of the present invention, make the user can use lower cost, bigger display size, interactive stronger multimedia remote education is removed to promote the use of in the place that takies still less.
Description of drawings
Fig. 1 is the structural representation of embodiment of the invention ultra-thin large-screen micro-display rear projection display device;
Fig. 2 is the optical projection structural representation of another embodiment of the present invention ultra-thin large-screen micro-display rear projection display device.
Embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
Because the present technique invention has changed the angle of large reflective mirror placement location, if still adopt the words of plane small reflector mode in the past, the distance that will make the light that oppositely comes out with angle that comes out from the light engine camera lens arrive screen becomes different, so it is trapezoidal to make that image forms.The reflex time of and imaging plane vertical when optical axis, defining Y is the projected size size, X is a projector distance, B is the angle between projection ray and optical axis, m is the coefficient of relationship between X and the B, and k is a constant coefficient, the available following formulate of the size dimension of projection and the relation between the projector distance:
Y＝kX；X＝mB；
When projection optical axis was not orthogonal to imaging surface, oppositely but become unequal with the m value of the light of angle, so the X value became unequal, causes the Y value also different.
In order to solve the influence that factor thus causes, so designed circular arc (non-ball) face catoptron among the present invention,, made when reverse angle is identical, made X value equal, the Y value that draws to revise the m coefficient.For this reason, can fix tentatively this coefficient is m ', and the angle of optical axis and screen is A, therefore just draws:
X＝m’(sinA)B；
Therefore can oppositely derive m ' according to above formula, use the inverse of m ' to revise the face type of small reflector.So therefore, can know that m ' no longer is a constant and function of first order, but two orders relevant with angle and trigonometric function or three order functions according to different conditions, may draw also and be similar to EQUATION x
2/ a
2-y
2/ b
2The reflecting surface of the hyperbolic-type arc surface of=1 (a, b value change and difference according to angle) comes, and therefore the reflecting surface of small reflector of the present invention just becomes a circular arc (non-ball) face reflecting surface.
As shown in Figure 1, a kind of ultra-thin large-screen micro-display rear projection display device, comprise casing 1, screen 2, photo engine 3, aspheric surface small reflector 4, large reflective mirror 5, described screen 2 is located at the front of casing 1, described photo engine 3 is located at the following rear portion of casing 1, described arc surface small reflector 4 is placed on the screen below in the casing, described large reflective mirror 5 is located at the rear portion in the casing, and it is parallel with screen cover, the light signal that described photo engine sends passes through the reflection of aspheric surface small reflector, large reflective mirror successively, projects at last on the screen; Dotted line is depicted as the LCD-DLP-LCOS display of prior art scheme among Fig. 1;
As shown in Figure 2, a kind of ultra-thin large-screen micro-display rear projection display device, the light signal that described photo engine 3 sends is projected on the aspheric small reflector 4, and projects on the screen 2 that is located at casing 1 front through after the reflection of large reflective mirror 5.This example large reflective mirror is parallel with screen cover, and small reflector is that non-spherical reflector is to correct figure deformation and to shorten projector distance.This example is compared with the rear projection display of prior art design with adopting the same light engine, and thickness can reduce by 30～35cm, and is basic and flat panel TV thickness is approaching.
Claims (2)
1, a kind of ultra-thin large-screen micro-display rear projection display device, comprise casing, be located at the screen in casing front, and be located at photo engine, small reflector, large reflective mirror in the casing, the light signal that described photo engine sends passes through the reflection of small reflector, large reflective mirror successively, project at last on the screen, it is characterized in that: described small reflector is the arc surface small reflector, and be placed on described screen under, large reflective mirror is located at the screen rear, and parallel with screen.
2, ultra-thin large-screen micro-display rear projection display device according to claim 1 is characterized in that, the arc surface of described small reflector is x
2/ a
2-y
2/ b
2The arc surface of=1 hyperbolic-type.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810035184A CN101546106A (en) | 2008-03-26 | 2008-03-26 | Ultra-thin large-screen micro-display rear projection display device |
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|---|---|---|---|
| CN200810035184A CN101546106A (en) | 2008-03-26 | 2008-03-26 | Ultra-thin large-screen micro-display rear projection display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149785A (en) * | 2013-03-26 | 2013-06-12 | 无锡视美乐激光显示科技有限公司 | Ultrathin large-screen micro-display rear projection display device |
| CN103293841A (en) * | 2013-05-31 | 2013-09-11 | 无锡神州服联技术服务有限公司 | Embedded rear projection interactive table with ultra-thin large screen |
-
2008
- 2008-03-26 CN CN200810035184A patent/CN101546106A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149785A (en) * | 2013-03-26 | 2013-06-12 | 无锡视美乐激光显示科技有限公司 | Ultrathin large-screen micro-display rear projection display device |
| CN103293841A (en) * | 2013-05-31 | 2013-09-11 | 无锡神州服联技术服务有限公司 | Embedded rear projection interactive table with ultra-thin large screen |
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Effective date of registration: 20100902 Address after: 100026, 501, 3, 5, East, Tuanjiehu, Beijing, Chaoyang District Applicant after: Zheng Zhanqing Co-applicant after: Li Weihua Address before: 200050, B, building 357, 509 Zhao Lu, Changning District, Shanghai Applicant before: Shanghai Sinova Technology Co., Ltd. |
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