CN216160963U - Projection device and electronic equipment - Google Patents
Projection device and electronic equipment Download PDFInfo
- Publication number
- CN216160963U CN216160963U CN202121200683.7U CN202121200683U CN216160963U CN 216160963 U CN216160963 U CN 216160963U CN 202121200683 U CN202121200683 U CN 202121200683U CN 216160963 U CN216160963 U CN 216160963U
- Authority
- CN
- China
- Prior art keywords
- lens
- light source
- prism
- relay
- optical axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to a projection device and an electronic apparatus. The projection device comprises a light source system, a collimation system, a dodging system, a relay system, a prism system and a lens system which are sequentially arranged along the direction of a light path; the light source system, the collimation system, the dodging system and the relay system are arranged along a first optical axis, the prism system and the lens system are arranged along a second optical axis, and the first optical axis is orthogonal to the second optical axis.
Description
Technical Field
The present invention relates to the field of digital projection display technologies, and in particular, to a projection apparatus and an electronic device.
Background
Due to the rapid development of semiconductor technology, no matter the liquid crystal display projection technology, the liquid crystal on silicon projection technology, the digital light processing projection technology or the laser projection technology, the pixel is improved, and the miniaturization, high brightness and small projection ratio of the projection device are required.
In order to realize the short-distance large-picture projection imaging effect, the projection device is provided with a short-focus or ultra-short-focus lens. Since the aperture of the short-focus or ultra-short-focus lens is relatively large, mechanical interference with the illumination system is easily generated.
In order to avoid short-focus or ultra-short-focus lenses, the illumination system usually needs to occupy the heat dissipation space of the projection device. And in order to adapt to the imaging effect of different environments, the power of the light source is large, and the generated heat is high. Under the condition that the heat dissipation of the projection device is not smooth, the projection device is subjected to overheat protection, and the projection device is automatically extinguished.
In addition, the light source and the display chip are not matched in size, which results in a reduction in the contrast of the projection apparatus.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide a projection apparatus and a new technical solution of an electronic device.
According to one aspect of the present invention, a projection apparatus is provided. The projection device comprises a light source system, a collimation system, a dodging system, a relay system, a prism system and a lens system which are sequentially arranged along the direction of a light path;
the light source system, the collimation system, the dodging system and the relay system are arranged along a first optical axis, the prism system and the lens system are arranged along a second optical axis, and the first optical axis is orthogonal to the second optical axis.
Optionally, the light source system comprises a first light source, a second light source and a third light source arranged in sequence.
Optionally, the collimating system includes a collimating field lens disposed between the second light source and the third light source.
Optionally, the collimating field lens comprises a free-form lens.
Optionally, the curved surface of the free-form lens is described by:
wherein z is the height loss of the curved surface, x and y are the projection coordinates of the height of the curved surface on the optical axis, R is the curvature radius, R is the distance between the curved surface and the optical axisxRadius of curvature in x-direction, RyTo mean the radius of curvature in the y-direction, kxRefers to the conic coefficient, k, in the x-directionyRefers to the conic coefficient in the y-direction.
Optionally, the relay system includes a first relay lens, a mirror, and a second relay lens, which are sequentially disposed.
Optionally, at least one of the first relay lens and the second relay lens comprises a free-form lens.
Optionally, the incident surfaces of the first relay lens and the second relay lens are biconic free-form surfaces, and the exit surface is an even aspheric surface.
Optionally, the prism system includes a right-angle single prism, a first right-angle side of the right-angle single prism is perpendicular to the second optical axis, a display chip is disposed on a second right-angle side of the right-angle single prism, and the relay system is disposed on a hypotenuse of the right-angle single prism.
Optionally, the prism system comprises a compensation prism, and the compensation prism is arranged on the hypotenuse of the right-angle single prism.
According to an aspect of the present invention, an electronic device is provided, which includes the projection apparatus described above.
The projection device has the technical effects that through the mode, the projection device can be adapted to short-focus or ultra-short-focus lenses with different requirements on the premise that the heat dissipation function, the light effect of a light source system, the lens performance and the production and processing convenience are not sacrificed, and the projection device is smaller in size.
In addition, through the mode, the situation that the projection device is subjected to overheating protection, automatically extinguishes and the like due to the fact that the heat dissipation space of the projection device is occupied is effectively prevented.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description, serve to explain the principles of the utility model.
Fig. 1 is a schematic structural diagram of a projection apparatus according to an embodiment of the present application.
Fig. 2 is a schematic view of another angle of fig. 1.
Fig. 3 is a partial view of fig. 1.
Fig. 4 is a light path diagram in fig. 1.
FIG. 5 is a diagram illustrating an image light distribution diagram projected by an optical system red, blue, green and light source based on TracePro software on the active surface of a display chip, respectively.
Description of reference numerals:
100: a light source system; 101-1: a first light source; 101-2: a second light source; 101-3: a third light source; 200: a collimating system; 201: a first collimating lens; 202: a second collimating lens; 203: a first dichroic mirror; 204: a second dichroic mirror; 205: a collimating field lens; 300: a light uniformizing system; 400: a relay system; 401: a first relay lens; 402: a second relay lens; 403: a mirror; 500: a prism system; 501: a right-angle single prism; 502: a compensation prism; 600: a lens system.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses.
Techniques and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be considered a part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In an embodiment of the present application, a projection apparatus is provided, as shown in fig. 1 and fig. 2, including a light source system 100, a collimating system 200, a dodging system 300, a relay system 400, a prism system 500, and a lens system 600, which are sequentially arranged along an optical path direction. The light source system 100, the collimating system 200, the dodging system 300 and the relay system 400 are disposed along a first optical axis, and the prism system 500 and the lens system 600 are disposed along a second optical axis, where the first optical axis is orthogonal to the second optical axis.
The light source system 100 includes an LED red light source, an LED green light source, and an LED blue light source.
The collimation system 200 collects and straightens the light beams emitted by the light sources, and combines the light from the LED red light source, the LED green light source and the LED blue light source to form a white light beam.
The dodging system 300 is used to convert a white light beam from the collimating system 200 into a uniform surface beam.
The relay system 400 is used to collect and direct the area beam from the dodging system 300 to the prism system 500.
The prism system 500 is used for transmitting the light beam from the relay system 400 to the display chip, and the display chip reflects the light beam to the inside of the prism system 500 and is totally reflected to the lens system 600 by the prism system 500.
The light emitted from the light source system 100 passes through the collimating system 200, the dodging system 300 and the relay system 400 along a first optical axis, and passes through the prism system 500 and the lens system 600 along a second optical axis. The first optical axis is orthogonal to the second optical axis, i.e. the included angle between the first optical axis and the second optical axis is 90 °.
Through the mode, the projection device can adapt to short-focus or ultra-short-focus lenses with different requirements on the premise of not sacrificing the heat dissipation function of the projection device, the lighting effect of the light source system 100, the lens performance and the production and processing convenience, and has a smaller size.
In addition, through the mode, the situations that the projection device is subjected to overheating protection, automatically extinguishes and the like due to the fact that the heat space dissipated by the projection device is occupied are effectively prevented.
In one embodiment of the present application, light source system 100 includes first light source 101-1, first light source 101-2, and first light source 101-3, which are arranged in sequence. The collimating system 200 comprises a collimating field lens 205, the collimating field lens 205 being arranged between the first light source 101-2 and the first light source 101-3.
For example, as shown in fig. 1, 2 and 4, the first light source 101-1 is an LED blue light source, the second light source 101-2 is an LED red light source, and the third light source 101-3 is an LED green light source.
The collimating system 200 includes a first collimating lens 201 and a second collimating lens 202 sequentially arranged along the light path direction of the LED blue light source, and the first collimating lens 201 and the second collimating lens 202 are arranged along the light path direction of the LED red light source and the LED green light source in the same manner as the arrangement manner of the LED blue light source and the first collimating lens 201 and the second collimating lens 202. The first collimating lens 201 and the second collimating lens 202 can converge and straighten the light beams emitted by the LED blue light source, the LED red light source and the LED green light source, and adjust the light beams emitted by the LED light sources into approximately parallel light beams.
Taking the LED blue light source as an example, the LED blue light source is incident to the first collimating lens 201, and the first collimating lens 201 further gathers and straightens the blue light beam. The converged and straightened blue light beam is incident to the second collimating lens 202 from the first collimating lens 201 for further straightening. The light beams emitted by the LED red light source and the LED green light source are converged and straightened by the first collimating lens 201 and the second collimating lens 202 which are correspondingly arranged.
In this way, the blue light, the red light and the green light emitted by the first collimating lens 201 and the second collimating lens 202 are more uniform, and chromatic aberration is reduced.
In addition, in this way, the utilization rate of the light source system 100 is improved.
As shown in fig. 1, 2 and 4, the collimating system 200 further includes a first color-separating lens 203, a second color-separating lens 204, and a collimating field lens 205 located between the first color-separating lens 203 and the second color-separating lens 204. The first dichroic mirror 203 is a blue light transmitting and red light reflecting dichroic mirror, and the second dichroic mirror 204 is a red light transmitting and blue light reflecting and green light dichroic mirror. Blue light beams emitted by the LED blue light source are converged and straightened by the first collimating lens 201 and the second collimating lens 202, and then pass through the first dichroic mirror 203 and enter the collimating field lens 205. And enters the second dichroic mirror 204 through the collimating field lens 205 and enters the light uniformizing system 300 through the second dichroic mirror 204. The red light beam emitted by the LED red light source is converged and straightened by the first collimating lens 201 and the second collimating lens 202, and then enters the first dichroic mirror 203, and is reflected to the collimating field lens 205 by the first dichroic mirror 203. The red light beam passes through the collimating field lens 205, and passes through the second dichroic mirror 204 and is incident on the dodging system 300. The green light beam emitted by the LED green light source is converged and straightened by the first collimating lens 201 and the second collimating lens 202, then enters the second dichroic mirror 204, and is reflected to the light uniformizing system 300 by the second dichroic mirror 204. After passing through the second dichroic mirror 204, the blue light beam, the red light beam and the green light beam are combined to form a white light beam, and are incident on the dodging system 300.
By arranging the collimating field lens 205 between the first dichroic mirror 203 and the second dichroic mirror 204, the disadvantages of light loss and uneven light beams caused by the fact that the optical paths of the blue light source and the red light source of the LED are larger than those of the green light source of the LED are avoided, and the light beams from the light source system 100 can be further gathered and straightened, so that the white light beams synthesized by the light beams of the blue light source, the red light source and the green light source of the LED are more uniform, and the brightness is higher.
As shown in fig. 1 and 4, in one embodiment of the present application, the collimating field lens 205 comprises a free-form lens.
For example, at least one surface of the collimating field lens 205 is a free-form surface. The light beam from the first dichroic mirror 203 enters the collimating field lens 205 including a free-form surface, and exits the collimating field lens 205 and enters the second dichroic mirror 204. In this way, the incident light can be shaped, enabling the incident light beam to match the effective illumination area size of the display chip.
For example, the display surface of the display chip is rectangular. For example, the focal lengths of the free-form surfaces in the X direction and the Y direction are different, so that the light projected onto the display chip can be adapted to the size of the rectangular effective irradiation area, and the contrast of the projection apparatus is improved.
In addition, by replacing the collimating field lens 205 with a free-form surface lens, the light efficiency can be further enhanced, and the brightness of the light beam incident on the effective irradiation area surface of the display chip can be more uniform.
In the embodiment, the free-form surfaces are respectively symmetrical along the x direction or the y direction, and the parameters of the x direction and the y direction are different;
the free form surface is described by:
wherein z is the rise of the curved surface, x and y are the projection coordinates of the height of the curved surface on the optical axis respectively, R is the curvature radiusxRadius of curvature in x-direction, RyTo mean the radius of curvature in the y-direction, kxRefers to the conic coefficient, k, in the x-directionyRefers to the conic coefficient in the y-direction.
By the mode, light beams can be further gathered, light loss is reduced, and light efficiency is further improved.
As shown in fig. 1, 2 and 4, the dodging system 300 includes a compound eye to convert the white light beam from the second dichroic mirror 204 into a uniform surface beam.
In one embodiment of the present application, as shown in fig. 1 and 3, the relay system 400 includes a first relay lens 401, a mirror 403, and a second relay lens 402 arranged in sequence. The mirror 403 is disposed between the first relay lens 401 and the second relay lens 402.
The first relay lens 401 is located on the light exit surface side of the compound eye to condense the light beam from the compound eye. The light beam is incident on the mirror 403 through the first relay lens 401. The light beam incident on the surface of the mirror 403 is reflected to the second relay lens 402 for further condensing, and the condensed light beam is incident on the prism system 500 through the second relay lens 402.
By the mode, the first optical axis and the second optical axis can be orthogonal, so that the size of the projection device is reduced, and the projection device is beneficial to miniaturization.
As shown in fig. 1-4, in one embodiment of the present application, at least one of the first relay lens 401 and the second relay lens 402 comprises a free-form lens. In this way, the light efficiency can be further enhanced, and the brightness reaching the display chip can be made more uniform.
Those skilled in the art can select the arrangement of the free-form surface in the relay system 400 according to the needs.
As shown in fig. 4, the incident surface of each of the first relay lens 401 and the second relay lens 402 is a biconic free-form surface, and the exit surface is an even aspheric surface.
In this way, the light beams incident to the display chip are more uniform, and the light efficiency can be further improved. The brightness of the projection device is improved on the premise of not increasing the power of the light source.
In addition, in this way, the light beam incident on the display chip can be shaped, so that the incident light beam can be matched with the effective irradiation surface size of the display chip.
For example, the biconical free-form surface is a biconical zernike free-form surface. By the mode, the light beams are more uniform, and the light efficiency is improved.
For example, the first relay lens 401 or the second relay lens 402 is a double-free-form surface lens, such as a double-cone free-form surface, which is a non-rotationally symmetrical surface type but symmetrical in the x direction and the y direction. By the mode, the regulation and control of the light ray angle, the optical path difference, the light beam propagation direction and the light intensity can be realized simultaneously. And further matching the size of the light beam incident to the display chip with the effective irradiation surface of the display chip.
In addition, through the mode, the symmetry of lens assembly can be kept, and the test difficulty of the projection device is avoided being increased after the free-form surface is used. This allows further matching of the size of the light source beam to the display chip, which improves the geometrical optical efficiency.
In another embodiment of the present application, the prism system 500 includes a right-angle single prism 501, a first right-angle side of the right-angle single prism 501 is perpendicular to a second optical axis, a display chip is disposed on the second right-angle side of the right-angle single prism 501, and the relay system 400 is disposed on a hypotenuse of the right-angle single prism 501.
The right angle single prism 501 is used to uniformly inject the light beam from the relay system 400 onto the display chip. The light beam emitted from the compound eye passes through the surface on which the hypotenuse of the right-angle single prism 501 is located, and is incident on the display chip. The display chip reflects the light beam to the inner surface of the hypotenuse of the right-angle single prism 501, and the light beam from the display chip is totally reflected to the lens system 600 by the inner surface of the hypotenuse of the right-angle single prism 501.
For example, the display chip is a DMD light modulator. The DMD light modulator can reflect a light beam incident on its surface according to a predetermined program in accordance with a gray scale and a color required for an image. The light beam emitted from the relay system 400 having a free-form surface passes through a single rectangular prism 501 and enters the DMD light modulator. When the DMD modulator is in a reflective state, the light beam incident to the DMD light modulator is totally reflected by the prism system 500 to the lens system 600 to realize bright spot display; when the DMD modulator is in a non-reflective surface state, light beams incident to the DMD modulator are not reflected by the DMD modulator, and a dark dot display is formed on a screen.
In another embodiment of the present application, prism system 500 includes a compensating prism 502, where compensating prism 502 is disposed on the hypotenuse of right angle single prism 501. The compensating prism 502 is disposed between the right-angle single prism 501 and the relay system 400. By the mode, the brightness of the light beams incident to the right-angle single prism 501 and the display chip can be further improved, and the light effect is further improved.
According to another embodiment of the present application, an electronic device is provided. The electronic equipment comprises the projection device.
For example, the projector according to the present application is applied to electronic devices such as electronic computers, projectors, optical communications, digital cameras, and audio-visual devices.
< example 1>
Fig. 1 shows a specific embodiment of the present invention. In this example, the first light source 101-1 is an LED blue light source, the second light source 101-2 is an LED red light source, and the third light source 101-3 is an LED green light source. The first dichroic mirror 203 is a blue light transmitting and red light reflecting dichroic mirror, and the second dichroic mirror 204 is a blue light transmitting and red light reflecting and green light dichroic mirror. The compound eye comprises microlens units distributed in an array, such as 11 columns by 12 rows of microlens units, and the radius R of each microlens unit1＝0.935mm；R2-0.935mm and a thickness of 2.4 mm. The incident surface of the first relay lens 401 is a biconical free-form surface, and the exit surface is an even aspheric surface; the incident surface of the second relay lens 402 is a biconic free-form surface, the exit surface is an even aspheric surface, and the angle between the second relay lens 402 and the optical axis is 77 °.
Table 1 shows surface shape data of a partial lens of the projector according to the present application.
TABLE 1
Aiming at the configuration of the optical lens in the embodiment, based on TracePro software, the brightness and uniformity of the light beams emitted by the LED blue light source, the LED red light source and the LED green light source of the present application reaching the effective illumination surface of the display chip are detected.
Through the technical scheme of this embodiment, the luminous efficiency of the red light that the display chip can detect is 65%, the luminous efficiency of green light is 66%, and the luminous efficiency of blue light is 67%. Therefore, the light efficiency of the projection device is high.
In addition, as can be seen from fig. 5, the light beams emitted by the LED blue light source, the LED red light source and the LED green light source are incident on the display chip with higher brightness and more uniform color.
Although some specific embodiments of the present invention have been described in detail by way of illustration, it should be understood by those skilled in the art that the above illustration is only for the purpose of illustration and is not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.
Claims (10)
1. A projection device is characterized by comprising a light source system, a collimation system, a dodging system, a relay system, a prism system and a lens system which are sequentially arranged along the direction of a light path;
the light source system, the collimation system, the dodging system and the relay system are arranged along a first optical axis, the prism system and the lens system are arranged along a second optical axis, and the first optical axis is orthogonal to the second optical axis.
2. A projection apparatus according to claim 1, wherein said light source system comprises a first light source, a second light source and a third light source arranged in sequence;
the collimation system comprises a collimation field lens, and the collimation field lens is arranged between the second light source and the third light source.
3. A projection device according to claim 2, wherein said collimating field lens comprises a free-form lens.
4. A projection apparatus according to claim 3, wherein the free-form surface of said free-form surface lens is described by:
wherein z is the height loss of the curved surface, x and y are the projection coordinates of the height of the curved surface on the optical axis, R is the curvature radius, R is the distance between the curved surface and the optical axisxRadius of curvature in x-direction, RyTo mean the radius of curvature in the y-direction, kxRefers to the conic coefficient, k, in the x-directionyRefers to the conic coefficient in the y-direction.
5. A projection apparatus according to claim 1 or 3, wherein said relay system comprises a first relay lens, a reflector and a second relay lens arranged in sequence.
6. A projection device as claimed in claim 5, wherein at least one of said first relay lens and said second relay lens comprises a free-form lens.
7. The projection apparatus of claim 6, wherein the incident surfaces of the first relay lens and the second relay lens are biconic free-form surfaces, and the exit surface is an even aspheric surface.
8. A projection device according to claim 1, wherein said prism system comprises a right-angle single prism, a first right-angle side of said right-angle single prism is perpendicular to said second optical axis, a display chip is disposed on a second right-angle side of said right-angle single prism, and said relay system is disposed on a hypotenuse of said right-angle single prism.
9. A projection device according to claim 8, wherein said prism system comprises a compensation prism disposed on the hypotenuse of said right angle single prism.
10. An electronic device, characterized in that it comprises a projection device according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121200683.7U CN216160963U (en) | 2021-05-31 | 2021-05-31 | Projection device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121200683.7U CN216160963U (en) | 2021-05-31 | 2021-05-31 | Projection device and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216160963U true CN216160963U (en) | 2022-04-01 |
Family
ID=80835247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121200683.7U Active CN216160963U (en) | 2021-05-31 | 2021-05-31 | Projection device and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216160963U (en) |
-
2021
- 2021-05-31 CN CN202121200683.7U patent/CN216160963U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7946711B2 (en) | Illumination device and projection display device | |
| US5993010A (en) | Two-dimensional illumination optical system and liquid crystal projector using same | |
| JP5436097B2 (en) | Condensing optical system and projection-type image display device | |
| US20040036990A1 (en) | Light-emitting unit, illumination apparatus and projection display apparatus | |
| US7330314B1 (en) | Color combiner for solid-state light sources | |
| TW201316035A (en) | Illumination optical system and image display apparatus | |
| CN105264437A (en) | Illumination optical system and projector | |
| US9690179B2 (en) | Illumination unit and image display device incorporating same | |
| US11537037B2 (en) | Light source device, image projection apparatus, and light source optical system | |
| CN110320735B (en) | Projection device | |
| US8414132B2 (en) | Multiple-lights-combining illumination device and projection-type display apparatus using the same | |
| JP2008026793A (en) | Image projection device | |
| CN212411007U (en) | High-brightness small-volume light path structure based on DLP technology and used in AOI detection field | |
| CN216160963U (en) | Projection device and electronic equipment | |
| JP2015145975A (en) | Light source device and projection type display device using the same | |
| US20090059095A1 (en) | Projection lens system and method | |
| JP4094218B2 (en) | Condensing optical system and image display device | |
| US20110222025A1 (en) | Illumination optical device and projection display device using the illumination optical device | |
| KR20140002950A (en) | Lighting apparatus of projector module | |
| US20220308429A1 (en) | Projector | |
| JP2015022244A (en) | Solid light source device and image projection device | |
| WO2023082666A1 (en) | Light source and laser projection device | |
| WO2023103359A1 (en) | Light source and laser projection device | |
| TWI432779B (en) | Asymmetric lighting system and projection device | |
| CN112738484B (en) | Laser projection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221125 Address after: 261031 workshop 1, phase III, Geer Photoelectric Industrial Park, 3999 Huixian Road, Yongchun community, Qingchi street, high tech Zone, Weifang City, Shandong Province Patentee after: GoerTek Optical Technology Co.,Ltd. Address before: 261031 No. 268 Dongfang Road, hi tech Industrial Development Zone, Shandong, Weifang Patentee before: GOERTEK Inc. |
|
| TR01 | Transfer of patent right |