CN209299423U - A kind of DLP projector - Google Patents
A kind of DLP projector Download PDFInfo
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- CN209299423U CN209299423U CN201822201492.7U CN201822201492U CN209299423U CN 209299423 U CN209299423 U CN 209299423U CN 201822201492 U CN201822201492 U CN 201822201492U CN 209299423 U CN209299423 U CN 209299423U
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- light
- projection
- optical modulator
- dmd
- absorber
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Abstract
The utility model provides a kind of DLP projector.Including for electro-optical device, DMD optical modulator and absorber；It is described for electro-optical device to provide projection light source, the DMD optical modulator is to be modulated acquisition reflected light to from the light for electro-optical device, the DMD optical modulator includes projection state and non-projection state, under the projection state, to project, the reflected light under the non-projection state is absorbed the reflected light by the absorber；Wherein, it is additionally provided with beam condensing unit between the absorber and the DMD optical modulator, to be collected under the non-projection state of the DMD optical modulator to the reflected light.DLP projector according to the present utility model, the beam condensing unit being arranged between DMD optical modulator and absorber on the light path system of projection, the reflected light effectively prevented under non-projection state are projected, and improve the contrast of projection display picture.
Description
Technical field
The utility model relates to field of electronic devices, in particular to a kind of DLP projector.
Background technique
In recent years, with the continuous progress of science and technology, each electronic product all tends to minimize, and portable direction is developed,
Projector is no exception, DLP (Digital Light Processing) minitype projection machine, also referred to as digital light processing projection
Machine is, as image device, to pass through tune using digital micro-mirror device DMD (Digital Micromirror Device) optical modulator
Save the instrument that reflected light realizes projection image.
In DLP projector, image is generated by DMD light modulator modulates.DMD optical modulator is cloth on a semiconductor die
One set matrix as composed by micromirror (accurate, miniature reflecting mirror), each micromirror control in projected picture
One pixel.Micromirror can rapidly change angle under the control of digital drive signals, once it is micro- to receive corresponding signal
Eyeglass will be tilted a certain angle, so that the reflection direction of incident light be made to change.DMD optical modulator in projection state, it is micro-
Eyeglass tilts certain positive inclination angle with digital signal.DMD optical modulator in non-projection state, micromirror inclination are certain
Negative sense inclination angle.At the same time, the incident light reflected away under projection state by the micromirror in DMD optical modulator is saturating by projection
Mirror is by image projecting to screen, and the incident light reflected away under non-projection state by the micromirror in DMD optical modulator
It is absorbed device absorption.
Traditional DLP illumination path, when DMD optical modulator is in non-projection state, the light of reflection is by close to DMD light
The absorber of modulator absorbs, but absorber tends not to fully absorb the reflected light under Diao Fei projection state, this allows for portion
Divide stray light to enter imaging system, reduces the contrast of projected picture.Referring to Fig. 1, a kind of optical path of DLP projector is shown
The structural schematic diagram of system comprising along optical path set gradually for electro-optical device 11, the 12 of guide-lighting light, relay system 13, DMD
Optical modulator 14 and projection lens 15.When DMD optical modulator is in non-projection state, due to close to DMD optical modulator 14
Absorber 16 cannot fully absorb Diao Fei projection state light, this allows for part stray light and enters projection lens 15, and reduces
The contrast of projected picture.
The utility model provides a kind of DLP projector, to solve the problems of the prior art.
Utility model content
A series of concept of reduced forms is introduced in utility model content part, this will be in specific embodiment part
Middle further description.The utility model content part of the utility model is not meant to attempt to limit claimed
Technical solution key feature and essential features, do not mean that the guarantor for attempting to determine technical solution claimed more
Protect range.
In order to solve the problems in the prior art, the utility model provides a kind of DLP projector, comprising: for electro-optical device,
DMD optical modulator and absorber；
It is described for electro-optical device to provide projection light source, the DMD optical modulator is to from described for electro-optical device
Light be modulated acquisition reflected light, the DMD optical modulator includes projection state and non-projection state, in the projection state
Under, to project, the reflected light under the non-projection state is absorbed the reflected light by the absorber；
Wherein, it is additionally provided with beam condensing unit between the absorber and the DMD optical modulator, in the DMD
The reflected light is collected under the non-projection state of optical modulator.
Illustratively, the beam condensing unit includes condenser.
Illustratively, the beam condensing unit further includes the optical fiber being arranged between the condenser and the absorber.
Illustratively, described for electro-optical device includes three primary light source.
It illustratively, further include guiding device, the guiding device is to convert the light provided for electro-optical device
At uniform light spots.
It illustratively, further include relay system, the relay system is to receive the hot spot and the hot spot is imaged
Onto DMD optical modulator.
Illustratively, further include projection lens, the projection lens under the projection state to the reflected light
It is projected.
Illustratively, the absorber surface is in black.DLP projector according to the present utility model, in the optical path of projection
The beam condensing unit being arranged between DMD optical modulator and absorber in system, so that being in non-projection shape in DMD optical modulator
When state, reflection light is absorbed device absorption after beam condensing unit aggregation, effectively prevents the reflected light under non-projection state
It is projected into projection lens, improves the contrast of projection display picture.
Detailed description of the invention
The following drawings of the utility model is used to understand the utility model in this as a part of the utility model.Attached drawing
In show the embodiments of the present invention and its description, for explaining the principles of the present invention.
In attached drawing:
Fig. 1 is a kind of structural schematic diagram of the light path system of DLP projector；
Fig. 2 is the structural schematic diagram according to a kind of light path system of DLP projector of one embodiment of the utility model.
Specific embodiment
In the following description, a large amount of concrete details are given more thoroughly to manage in order to provide to the utility model
Solution.It is, however, obvious to a person skilled in the art that the utility model may not need it is one or more of these thin
It saves and is carried out.In other examples, in order to avoid obscuring with the utility model, for more well known in the art
Technical characteristic is not described.
In order to thoroughly understand the utility model, detailed description will be proposed in following description, to illustrate that this is practical new
The DLP projector of type.Obviously, it is special that the technical staff that the execution of the utility model is not limited to field of electronic device is familiar with
Details.The preferred embodiment of the utility model is described in detail as follows, however other than these detailed descriptions, the utility model may be used also
With other embodiments.
It should give it is noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the exemplary embodiment of the utility model.As used herein, unless the context clearly indicates otherwise, otherwise singular shape
Formula is also intended to include plural form.Additionally, it should be understood that when using term "comprising" and/or " packet in the present specification
Include " when, indicate that there are the feature, entirety, step, operation, element and/or component, but do not preclude the presence or addition of one
Or other multiple features, entirety, step, operation, element, component and/or their combination.
Now, exemplary embodiment according to the present utility model is more fully described with reference to the accompanying drawings.However, these examples
Property embodiment can be implemented with many different forms, and should not be construed to be limited solely to the embodiments set forth herein.
It should be understood that these embodiments are provided so that the utility model disclosure it is thoroughly and complete, and these are shown
The design of example property embodiment is fully conveyed to those of ordinary skill in the art.In the accompanying drawings, for the sake of clarity, exaggerate layer and
The thickness in region, and make that identical element is presented with like reference characters, thus description of them will be omitted.
Embodiment one
In order to solve the problems in the prior art, the utility model provides a kind of DLP projector, including for electro-optical device,
DMD optical modulator and absorber；
It is described for electro-optical device to provide projection light source, the DMD optical modulator is to from described for electro-optical device
Light be modulated acquisition reflected light, the DMD optical modulator includes projection state and non-projection state, in the projection state
Under, to project, the reflected light under the non-projection state is absorbed the reflected light by the absorber；
Wherein, it is additionally provided with beam condensing unit between the absorber and the DMD optical modulator, in the DMD
The reflected light is collected under the non-projection state of optical modulator.
It is schematically illustrated below with reference to DLP projector of the Fig. 2 to the utility model, wherein Fig. 2 is practical according to this
The structural schematic diagram of the light path system of the DLP projector of novel one embodiment.
Referring to Fig. 2, the light path system of DLP projector includes for electro-optical device 21, guiding device 22, relay system 23, projection
Camera lens 25 and absorber 26.
For electro-optical device 21 to provide light source.Illustratively, light source is the three primary light source that three primary colours are packaged together.?
In one example of the utility model, light source includes first light source, second light source and third light source.First light source is blue led
Light source, second light source are red LED light source, and third light source is green LED light source.By first light source, second light source and third light
Source forms three primary light source.It is to be appreciated that this is not limited to LED light source, UHP, LASER, mixed light using the light source of confidence
Source is suitable for the utility model, and setting forms the setting form for being also not necessarily limited to the present embodiment.
The guiding device 22 is will be converted into uniform light spots from the light for electro-optical device 21.Illustratively, institute
Stating guiding device includes collector lens.
Relay system 23 is to receive the hot spot and the hot spot is imaged on DMD optical modulator 24.Relay system
It including multiple independent lens elements, but also may include one or more folding mirrors and hole.Illustratively, institute
Stating relay system includes TIR prism component.Illustratively, the TIR prism component includes convex lens and wedge-shaped compensating prism.
DMD optical modulator 24 is to realize projection image by adjusting reflected light using digital micro-mirror chip as image device.
DMD optical modulator is the matrix as composed by micromirror (accurate, miniature reflecting mirror) arranged on a semiconductor die,
Each micromirror controls a pixel in projected picture.Micromirror can rapidly change under the control of digital drive signals
Angle, in an example of the utility model, when DMD optical modulator receives corresponding signal, micromirror can be at ± 12 °
In the range of tilt, so that the reflection direction of incident light be made to change.For example, when DMD optical modulator is in projection state, micro mirror
Piece tilts+12 ° certain with digital signal.If DMD optical modulator is in non-projection state, micromirror is with digital signal
- 12 ° of inclination.Under different heeling conditions, DMD optical modulator generates different reflected light inclination angles.As shown in Figure 1, in DMD light
When modulator is in projection state, the micromirror on DMD optical modulator 24 is modulated acquisition to the light from relay system 23
Reflected light enters projection lens 25；Micromirror pair when DMD optical modulator is in non-projection state, on DMD optical modulator 22
The reflected light that light from relay system 23 is modulated gathers absorber 26 by beam condensing unit.
Illustratively, beam condensing unit includes condenser 27.When DMD optical modulator is in non-projection state, condenser 27
Reflected light by the micromirror reflection in DMD optical modulator is collected and is converged, it is spuious into projection lens to reduce reflected light
Head, the reflected light effectively prevented under non-projection state enter projection lens, improve the contrast of projection display picture.At this
In one example of utility model, condenser can be set to the dedicated condenser of LED, to LED issue light beam be collected and
Convergence.Illustratively, condenser is set as pure reflection-type, including total internal reflection prism, shaping lens and/or reflecting mirror.
Illustratively, beam condensing unit further includes the optical fiber 28 being arranged between the absorber 26 and condenser 27.It is inhaling
It receives and optical fiber 28 is set between device 26 and condenser 27, absorber 26 can be arranged far to the position of projection lens 25, into one
It walks the reflected light being reduced or avoided under non-projection state and enters projection lens, improve the contrast of projection display picture.
Illustratively, 26 surface of absorber is in black, illustratively, using surface treatment so that 26 surface of absorber
Black.The surface blackening of absorber 26 facilitates the absorption to light, further increases under non-projection state, the absorption of reflected light
Efficiency improves the contrast of projected picture.
DLP projector according to the present utility model, setting is located at DMD optical modulator and absorption on the light path system of projection
Beam condensing unit between device, so that reflection light assembles it by beam condensing unit when DMD optical modulator is in non-projection state
After be absorbed device absorption, the reflected light effectively prevented under non-projection state enters projection lens, improves projection display picture
Contrast.
The utility model is illustrated through the foregoing embodiment, but it is to be understood that, above-described embodiment is
Purpose for illustrating and illustrating, and be not intended to limit the invention within the scope of described embodiment.Furthermore ability
Field technique personnel are it is understood that the utility model is not limited to above-described embodiment, and introduction according to the present utility model is also
More kinds of variants and modifications can be made, these variants and modifications all fall within the utility model range claimed with
It is interior.The protection scope of the utility model is defined by the appended claims and their equivalents.
Claims (8)
1. a kind of DLP projector characterized by comprising for electro-optical device, DMD optical modulator and absorber；
It is described for electro-optical device to provide projection light source, the DMD optical modulator is to from the light for electro-optical device
It is modulated acquisition reflected light, the DMD optical modulator includes projection state and non-projection state, under the projection state,
To project, the reflected light under the non-projection state is absorbed the reflected light by the absorber；
Wherein, it is additionally provided with beam condensing unit between the absorber and the DMD optical modulator, in the DMD light tune
The reflected light is collected under the non-projection state of device processed.
2. DLP projector according to claim 1, which is characterized in that the beam condensing unit includes condenser.
3. DLP projector according to claim 2, which is characterized in that the beam condensing unit further includes setting described poly-
Optical fiber between light device and the absorber.
4. DLP projector according to claim 1, which is characterized in that described for electro-optical device includes three primary light source.
5. DLP projector according to claim 1, which is characterized in that further include guiding device, the guiding device to
Uniform light spots are converted into for the light that electro-optical device provides by described.
6. DLP projector according to claim 5, which is characterized in that further include relay system, the relay system to
It receives the hot spot and the hot spot is imaged on DMD optical modulator.
7. DLP projector according to claim 1, which is characterized in that further include projection lens, the projection lens to
The reflected light is projected under the projection state.
8. DLP projector according to claim 1, which is characterized in that the absorber surface is in black.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822201492.7U CN209299423U (en) | 2018-12-26 | 2018-12-26 | A kind of DLP projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822201492.7U CN209299423U (en) | 2018-12-26 | 2018-12-26 | A kind of DLP projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209299423U true CN209299423U (en) | 2019-08-23 |
Family
ID=67649087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822201492.7U Active CN209299423U (en) | 2018-12-26 | 2018-12-26 | A kind of DLP projector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209299423U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021204032A1 (en) * | 2020-04-08 | 2021-10-14 | 深圳光峰科技股份有限公司 | Projection device |
-
2018
- 2018-12-26 CN CN201822201492.7U patent/CN209299423U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021204032A1 (en) * | 2020-04-08 | 2021-10-14 | 深圳光峰科技股份有限公司 | Projection device |
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