CN111077718A - Projector with a light source - Google Patents
Projector with a light source Download PDFInfo
- Publication number
- CN111077718A CN111077718A CN201811220003.0A CN201811220003A CN111077718A CN 111077718 A CN111077718 A CN 111077718A CN 201811220003 A CN201811220003 A CN 201811220003A CN 111077718 A CN111077718 A CN 111077718A
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- light
- module
- projector
- light source
- image
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/145—Housing details, e.g. position adjustments thereof
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection Apparatus (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
A projector comprises a shell and an optical machine, wherein a correction device is arranged in the shell and used for changing the projection direction of an image projected by the optical machine under the condition that the position of the shell is not changed. According to the invention, the correction device is arranged in the projector shell, so that the projection direction of the projection image of the optical machine can be changed under the condition that the projector is not moved, compared with the prior art, the correction device consumes less energy during working, and the collision of the projector in the moving process can be prevented.
Description
Technical Field
The invention relates to a projector, and belongs to the technical field of manufacturing of projection equipment.
Background
The projector forms an image by projecting emitted light onto a screen, and therefore the positional relationship of the projector and the screen directly affects the quality of the projected image. Generally, since display chips are all rectangles with a preset aspect ratio, it is desirable that an image projected to a screen for display is also a rectangle satisfying the same aspect ratio. However, since it is difficult to place the projector correctly by hand, the position of the projector usually needs to be corrected after the projector is turned on.
The position of the projector is generally corrected by providing an adjustment mechanism in the prior art. The adjusting mechanism can be a plurality of support legs arranged at the bottom of the projector, and the position of the projector can be adjusted by using the change of the length of the support legs; the adjusting mechanism can also be a rotating bracket arranged on the projector or a tripod capable of being adjusted in three dimensions.
In the correction process, the position of the whole projector needs to be moved, and as the projector is high in mass and the load of the adjusting mechanism is large, the mechanical abrasion of the adjusting mechanism is increased while more energy is consumed, so that the service life of the adjusting mechanism is influenced; in addition, the projector may collide during the moving process, causing unnecessary damage.
With the development of electronic control technology and processors, a technology for performing electronic correction according to an image appears on the market, for example, trapezoidal correction is performed on the image by changing projection pixels, however, the technology has the defects of reduced light utilization rate, light leakage and the like, dark area projection is easily generated in a corrected area, and the display effect is poor.
Disclosure of Invention
The present invention is directed to a projector, which includes a casing, a correction device disposed in the casing, and a light guide disposed in the casing, wherein the correction device is capable of changing a projection direction of an image projected by the light guide when the casing is not moved.
The technical problem to be solved by the invention is realized by the following technical scheme:
the invention relates to a projector, which comprises a shell and an optical machine, wherein a correction device is arranged in the shell and used for changing the projection direction of an image projected by the optical machine under the condition of not changing the position of the shell.
Specifically, the optical machine includes:
the light source module is used for emitting light source light to the light guide module;
a light guiding module for guiding the light source light to a light modulation module;
and the light modulation module comprises a light modulator and a projection lens and is used for receiving the light source light guided by the light guide module, modulating the light source light into image light and projecting the image light to the display device.
In order to change the projection direction of the projection image, the correction device comprises a driver, and the driver is used for driving the optical machine to change the projection direction so that the optical axis of the image light is inclined.
Preferably, the light source module, the light guide module and the light modulation module are fixedly connected, and the driver is fixed on the housing and drives the light source module, the light guide module and the light modulation module to integrally move.
In order to further miniaturize the projector and reduce the load of the correction device, the light source module and the housing are fixedly connected, the light guiding module and the light modulation module are fixedly connected, and the driver is fixed on the light source module or the housing and drives the light modulation module or drives the light modulation module and the light guiding module to move relative to the light source module.
In order to avoid the phenomenon that the projector reaches an adjusting boundary after being adjusted, and no adjusting space exists in the next correction, the projector further comprises an automatic resetting module, and the automatic resetting module is used for adjusting the optical machine of the projector to an initial position.
In order to ensure sealing, an opening arranged around the projection lens is formed in the shell, the opening is horn-shaped, and the opening is connected with the projection lens through telescopic rubber.
In order to limit the rotation angle of the optical machine, a plurality of limiting columns used for limiting the rotation angle of the optical machine are arranged in the casing.
In order to keep the projected image of the projector horizontal, the projector comprises a gravity detection module electrically connected with the correction device, and the gravity detection module is used for receiving or generating a gravity signal.
Preferably, the driver may further rotate an optical axis of the image light or move the image light back and forth in an optical axis direction.
In summary, the calibration device is disposed in the housing of the projector, so that the projection direction of the image projected by the optical engine can be changed when the housing of the projector is not moved.
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Drawings
FIG. 1 is a schematic view of a projector according to the present invention;
FIG. 2 is a schematic diagram of an optical-mechanical device according to the present invention;
fig. 3 is a schematic diagram of a light guiding module and a light modulation module after rotation according to an embodiment of the invention.
Detailed Description
Fig. 1 is a schematic structural diagram of a projector according to the present invention, and fig. 2 is a schematic structural diagram of an optical engine according to the present invention. As shown in fig. 1 and fig. 2, the present invention provides a projector, which includes a housing 120, an optical engine 110, and a calibration device 130.
The optical engine 110 is configured to generate a projection image and project the projection image to a display device.
The housing 120 is used for accommodating and protecting the optical engine 110, for example, for dust prevention and loading.
The correcting device 130 is disposed in the housing 120, and is configured to change the position of the optical engine 110 without changing the position of the housing 120, so as to change the projection direction of the projection image of the optical engine 110.
The optical machine 110 includes a light source module 01, a light guiding module 03 and a light modulation module 02.
The light source module 01 is used for emitting light source light to the light guide module 03, the light source light is generally uniform rectangular light spots, and can be of shapes such as circular light spots, and the light guide module 03 can also shape the light spots at the same time when necessary. The light source module 01 may be various types of light source modules.
The light source module 01 can comprise a bulb light source, a light homogenizing device and a light spot shaping device, wherein the bulb light source is a known halogen lamp, a xenon lamp and other light sources, the light source module 01 can directly emit white light, and can also form time sequence RGB or RGBW through a filter wheel, the light homogenizing device is used for homogenizing light emitted by the bulb light source, and the light spot shaping device enables light spots at the emitting end of the light source module 01 to be matched into light spots corresponding to the light modulation module 02.
The light source module 01 may further include an LED light source, a light uniformizing device, and a light spot shaping device, wherein the LED light source is an RGB three-color LED light source, each color of the LED light source may include a plurality of LEDs, and the LED light sources of various colors combine light by wavelength. The LED light source may be an hld (high luminance sensitivity) light source, that is, a plurality of LEDs are integrated into one high-brightness light source through the light collecting rod.
The light source module 01 may further include a Laser phosphor light source (ALPD, Advanced Laser phosphor display light source) including a blue Laser light source and a fluorescent color wheel, and a light collecting device.
The light source module 01 may further include a pure laser RGB light source and a speckle dispersing element, where the speckle dispersing element is a scattering sheet or an optical element vibration device.
The light guiding module 03 may include a mirror or the like for guiding the light source light emitted from the light source module 01 to the light modulation module 02.
The light modulation module 02 includes a light modulator and a projection lens 111, and is configured to receive light source light from the light source module 01 guided by the light guiding module 03, modulate the light source light into image light, and project the image light to a display device, specifically, light source light (such as a rectangular light spot, which is described below as a rectangular light spot) emitted by the light source module 01 is guided to the light modulator through the light guiding module 03, and is modulated by the light modulator to generate an image light spot, which is projected and imaged onto the display device (such as a screen outside the projector) through the projection lens 111 to form a projection image.
The light modulator can be an LCD light modulator, an LCoS light modulator, a DMD light modulator or an MEMS scanning light modulator, wherein the LCD light modulator and the LCoS light modulator need a light source to be a polarized light source, and the MEMS scanning light modulator needs the light source to be a laser light source or a light source with a small divergence angle.
The correcting device 130 includes a driver for driving the optical engine 110 to change the projection direction, so that the optical axis of the image light (i.e. the optical axis of the projection lens 111) is tilted. Further, the driver may also rotate an optical axis of the image light or move the image light back and forth in an optical axis direction. Specifically, the driving control of the correction device 130 drives the optical modulation module 02 of the optical machine 110 to displace, so as to change the projection direction of the projection image. The correcting means 130 may be composed of an existing stepping motor, gears, etc. For example, the calibration device 130 may be an adjusting device of an Adaptive Front-Lighting System (AFS) headlamp in a prior art automobile, and may also be other mechanical structures for adjusting positions and angles, which are prior art and will not be described herein again. For example, the component (such as the light modulation module 02) to be adjusted in the present invention can be disposed at the position of the original vehicle lamp module, so as to adjust the angle of the light emitted by the component by using the adjusting device. The correcting device 130 includes a horizontal adjusting device and a vertical adjusting device, which may be two independent adjusting members or an integrated two-dimensional adjusting device.
The calibration device 130 may also be another type of driver, for example, a stepper motor adjusted by a column, or a gear transmission. The calibration device 130 may also include a variety of auxiliary structures.
For example, when the optical engine 110 needs to rotate in the horizontal direction, a shaft may be further disposed at the bottom/top/side of the housing 120 close to the projection lens 111, and a through hole or a pit is disposed at a corresponding position of the optical engine base or the structural frame, so that the shaft passes through the through hole or the pit, and the optical engine base or the structural frame can rotate around the shaft, thereby driving the optical engine 110 to rotate.
In order to limit the rotation angle of the optical engine 110, a plurality of limiting columns are disposed in the housing 120 of the projector to prevent the optical engine 110 from rotating beyond a range.
In order to avoid the over-burden of a single axle, a groove or a protruding section may be disposed on the base or the structural frame of the optical engine 110, and a corresponding protruding section or a groove may be disposed on the projector housing 120, so that the optical engine 110 can rotate in the sliding track formed by the groove.
In order to improve the adjustment precision and prevent the optical machine 110 from moving back and forth during the rotation process, the movement of the optical machine 110 can be limited by a spring element or a frictional resistance element. Specifically, the base or the structural frame of the optical machine can be respectively connected to the two fixing columns through the two springs, when the optical machine rotates towards one direction, one spring compresses the other spring to stretch, and vice versa; or, the high damping ring sleeve is arranged in the slide rail, so that the friction resistance of the movement of the optical machine 110 is improved.
The above description is about the case where the optical engine 110 rotates in the horizontal direction, and the horizontal keystone correction is performed in correspondence to the projected image.
When the optical engine 110 is required to rotate along the optical axis of the image light, the side wall of the optical engine base or the structural frame adjacent to the outer side of the projection lens 111 may be set as a cylindrical surface, and an annular cylindrical groove is disposed on the outer shell 120 adjacent to the cylindrical surface, so that the cylindrical surface is accommodated in the groove. At this time, the calibration device 130 may further include a retractable upright disposed on a side of the optical engine base or the structural frame away from the projection lens 111, so that the optical engine can rotate around the optical axis of the projection lens 111 through the retractable upright.
For the case where the pitch angle of the projected image needs to be adjusted, reference may be made to the above two adjustment methods, which are the same in principle and both of which are rotated about an axis.
The calibration device 130 may be configured to be manually adjusted or automatically adjusted. For example, when manual adjustment is used, the user can operate the calibration device 130 by pressing or toggling a button, a knob, a gear, etc. on the exterior of the projector housing 120, or can control a driver (e.g., a motor) on the calibration device via a remote controller to adjust the movement of the calibration device. When the automatic adjustment is adopted, the image picture can be photographed and then adjusted by the camera through a built-in program.
In order to ensure that the calibration device 130 can drive the light modulation module 02 to move, a space for the light modulation module 02 to move is required to be arranged in the housing 120. Taking a projector with a length of 20cm as an example, when the projection lens 111 rotates ± 5 ° in a certain direction, it means that the light modulation module 02 moves 20cm × sin5 ° ≈ 1.74cm in the direction, and if the projection distance of the projector is 3m, the projection lens 111 rotating ± 5 ° can make the picture deviate from a distance of 3m × tan5 ° ≈ 26cm, while when the user manually sets the projector, the center of the picture is generally not far away from 26cm, that is, the correction requirement of the common user on the projector can be realized by reserving a space less than 2cm in the housing 120. In other words, preferably, considering the problem of the space inside the projector, it is recommended that the adjustment range is within ± 5 ° so that the carriage has a movement space of ± 1.74cm at most.
In an embodiment of the present invention, the light source module 01, the light guiding module 03 and the light modulation module 02 are relatively static, for example, they are fixedly connected to form an integral structure, that is, the relative positions of the light source module 01, the light guiding module 03 and the light modulation module 02 are not changed. At this time, the driver of the calibration device 130 is fixed on the housing 120, and when the calibration device 130 works, the driver drives the optical machine 110 to move integrally relative to the housing 120, so as to change the position of the projection lens 111, and on the basis that the position of the housing of the projector is not changed, the position of the projection light on the screen is adjusted, and a better rectangular projection effect is obtained.
In another embodiment of the present invention, the light source module 01 and the housing 120 are fixedly connected, the light guiding module 03 and the light modulation module 02 are fixedly connected, that is, the relative position of the light source module 01 and the housing 120 is not changed, and the relative position of the light guiding module 03 and the light modulation module 02 is not changed, and the latter can move relative to the former, fig. 3 is a schematic diagram of the light guiding module and the light modulation module after the light guiding module and the light modulation module rotate in an embodiment of the present invention, as shown in fig. 3, at this time, the driver of the correcting device 130 is fixed on the housing 120, and when the correcting device 130 operates, it drives the light guiding module 03 and the light modulation module 02 to move relative to the housing 120, or drives the light modulation module 02 to move relative to the housing 120, so as to change the position of the projection lens 111, on the basis that the positions of the projector housing and the light source module 01 are not changed, a better rectangular projection effect is obtained, in view of the characteristics of light reflection, as shown in fig. 3, in order to ensure that the main optical axis direction of the light source light incident on the light modulation module 02 is not changed, the light is changed, when the light guiding module 03 is connected to the light path of the light guiding module 03, 362, the light modulation module 03 can be connected to the light path of the light in the light path of the light of the present embodiment, 362, so that the present invention, 362, the present invention, the present.
In this embodiment, since the light source module 01 is not moved, only the positions of the light guiding module 03 and the light modulating module 02 are changed, or only the position of the light modulating module 02 is changed, the number of components that need to be moved is reduced, and the space for the movement of the optical engine 110 in the housing 120 can be further reduced, thereby facilitating the miniaturization design of the projector, reducing the weight load of the correcting device 130, and reducing the energy consumption and the mechanical wear.
In order to avoid the phenomenon that the projector reaches an adjustment boundary after undergoing adjustment, and no adjustment space exists in the next correction, the projector further comprises an automatic resetting module, and the automatic resetting module is used for adjusting the light modulation module 02 of the projector to an initial position. Specifically, the user can activate the auto-reset module when needed to return the light modulation module 02 to the initial position and then fix the position of the projector so that the projected image of the projector still has the possibility of being adjusted.
In order to keep the projected image of the projector horizontal, the projector further comprises a gravity detection module electrically connected to the calibration device 130, and the gravity detection module can receive or generate a gravity signal. Specifically, the gravity detection module includes a gravity sensor, or the gravity detection module includes a gravity signal receiver, where the gravity signal receiver is configured to receive signals of other devices (such as a mobile phone) with a gravity sensor, for example, the mobile phone with the gravity sensor is placed on a surface of a projector, so that the two devices are kept horizontal, and because the postures of the two devices are the same, the signals sent by the gravity sensor in the mobile phone can be applied to the projector.
In the adjustment process, because the projection lens of the light modulation module moves, the shell can block a projection image sent by the projection lens, or a gap is generated between the shell and the projection lens, so that the sealing performance of the shell is influenced.
According to the invention, the correction device is arranged in the projector shell, so that the projection direction of the projection image of the optical machine can be changed under the condition that the projector is not moved, compared with the prior art, the correction device consumes less energy during working, and the collision of the projector in the moving process can be prevented.
Claims (10)
1. A projector comprises a shell and an optical machine, and is characterized in that a correction device is arranged in the shell and used for changing the projection direction of an image projected by the optical machine under the condition of not changing the position of the shell.
2. The projector of claim 1, wherein the optical engine comprises:
the light source module is used for emitting light source light to the light guide module;
a light guiding module for guiding the light source light to a light modulation module;
and the light modulation module comprises a light modulator and a projection lens and is used for receiving the light source light guided by the light guide module, modulating the light source light into image light and projecting the image light to the display device.
3. The projector as claimed in claim 2, wherein the correction device comprises a driver for driving the optical engine to change the projection direction so that the optical axis of the image light is tilted.
4. The projector according to claim 3, wherein the light source module, the light guide module and the light modulation module are fixedly connected, and the driver is fixed to the housing and drives the light source module, the light guide module and the light modulation module to integrally move.
5. The projector as claimed in claim 3, wherein the light source module and the housing are fixedly connected, the light guiding module and the light modulation module are fixedly connected, and the driver is fixed to the light source module or the housing and drives the light modulation module or drives the light modulation module and the light guiding module to move relative to the light source module.
6. The projector as defined in claim 2 wherein the projector further comprises an automatic reset module, the automatic reset module being configured to adjust an optical engine of the projector to an initial position.
7. The projector as defined in claim 2, wherein the housing has an opening disposed around the projection lens, the opening is horn-shaped, and the opening is connected to the projection lens by a stretchable rubber.
8. The projector as claimed in claim 1, wherein a plurality of limiting posts for limiting the rotation angle of the optical engine are disposed in the housing.
9. The projector as claimed in claim 1, wherein the projector comprises a gravity detection module electrically connected to the calibration device, the gravity detection module being configured to receive or generate a gravity signal.
10. The projector as claimed in claim 3, wherein the driver further rotates an optical axis of the image light or moves the image light back and forth in an optical axis direction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811220003.0A CN111077718A (en) | 2018-10-19 | 2018-10-19 | Projector with a light source |
| PCT/CN2019/107999 WO2020078187A1 (en) | 2018-10-19 | 2019-09-26 | Projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811220003.0A CN111077718A (en) | 2018-10-19 | 2018-10-19 | Projector with a light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111077718A true CN111077718A (en) | 2020-04-28 |
Family
ID=70283541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811220003.0A Pending CN111077718A (en) | 2018-10-19 | 2018-10-19 | Projector with a light source |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111077718A (en) |
| WO (1) | WO2020078187A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114727074A (en) * | 2021-01-05 | 2022-07-08 | 成都极米科技股份有限公司 | Projection correction method and projection correction device for projection device and projection device |
| CN114827557A (en) * | 2021-03-05 | 2022-07-29 | 成都极米科技股份有限公司 | Projection trapezoidal correction method and device and projection system |
| CN114815482A (en) * | 2022-04-29 | 2022-07-29 | 赣州轰天炮显示电子科技有限公司 | Portable high-definition automatic focusing micro DLP projector |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114727074A (en) * | 2021-01-05 | 2022-07-08 | 成都极米科技股份有限公司 | Projection correction method and projection correction device for projection device and projection device |
| CN114727074B (en) * | 2021-01-05 | 2023-09-01 | 成都极米科技股份有限公司 | Projection correction method for projection device, projection correction device and projection device |
| CN114827557A (en) * | 2021-03-05 | 2022-07-29 | 成都极米科技股份有限公司 | Projection trapezoidal correction method and device and projection system |
| CN114827557B (en) * | 2021-03-05 | 2023-05-02 | 成都极米科技股份有限公司 | Projection trapezoid correction method, projection trapezoid correction device and projection system |
| CN114815482A (en) * | 2022-04-29 | 2022-07-29 | 赣州轰天炮显示电子科技有限公司 | Portable high-definition automatic focusing micro DLP projector |
| CN114815482B (en) * | 2022-04-29 | 2023-09-29 | 赣州轰天炮显示电子科技有限公司 | Portable high-definition automatic focusing miniature DLP projector |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020078187A1 (en) | 2020-04-23 |
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