CN111880361A - DLP projector working in low-temperature environment and method - Google Patents
DLP projector working in low-temperature environment and method Download PDFInfo
- Publication number
- CN111880361A CN111880361A CN202010546417.3A CN202010546417A CN111880361A CN 111880361 A CN111880361 A CN 111880361A CN 202010546417 A CN202010546417 A CN 202010546417A CN 111880361 A CN111880361 A CN 111880361A
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- Prior art keywords
- dlp projector
- temperature environment
- low
- ceramic heater
- preheating
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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
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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
- G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
- G03B21/008—Projectors using an electronic spatial light modulator but not peculiar thereto using micromirror devices
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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
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
Abstract
The invention discloses a DLP projector working in low temperature environment and a method thereof, comprising a Digital Micromirror Device (DMD); and the first ceramic heater is used for preheating the digital micromirror element before starting in a low-temperature environment. The invention has the beneficial effects that: the digital micromirror element is preheated by the first ceramic heater, so that the digital micromirror element can normally work under low temperature, the DLP projector can work under low temperature, and the output of images and light sources is ensured.
Description
Technical Field
The invention relates to the field of laser projectors, in particular to a DLP projector and a method for working in a low-temperature environment.
Background
At present, projectors based on DLP technology (such as the model G60-W10 of bacco and the model E580 of minji) commonly used in the market operate in low temperature environment (below zero degrees centigrade), and it may happen that the colors of the image actually projected do not match the colors of the image required to be projected by the system.
The applicant has found over the years that the above problems arise because the Digital Micromirror Device (DMD) used in the DLP projector is sensitive to ambient temperature. Before the digital micromirror device is started, if the digital micromirror device is in a low-temperature environment, subsequent normal operation cannot be guaranteed.
Disclosure of Invention
The invention aims to solve the technical problem that a DLP projector cannot be suitable for working in a low-temperature environment (below zero degrees centigrade), and provides a novel DLP projector working in the low-temperature environment and a method thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows: a DLP projector working in low temperature environment comprises,
a Digital Micromirror Device (DMD); and the number of the first and second groups,
and the first ceramic heater is positioned on the digital micro-mirror element and used for preheating the digital micro-mirror element in a low-temperature environment before starting.
The preferable proposal of the DLP projector working in low temperature environment also comprises,
a fluorescent wheel; and the number of the first and second groups,
and the second ceramic heater is positioned on the fluorescent wheel and used for preheating the fluorescent wheel in a low-temperature environment before starting.
The preferable proposal of the DLP projector working in low temperature environment also comprises,
a color wheel; and the number of the first and second groups,
and the third ceramic heater is positioned on the color wheel and used for preheating the color wheel before starting in a low-temperature environment.
The preferable proposal of the DLP projector working in low temperature environment also comprises,
and the temperature measuring device is used for sensing the ambient temperature of the DLP projector so as to determine whether the DLP projector is in a low-temperature environment.
As a preferred scheme of the DLP projector working in a low-temperature environment, the temperature measuring device is a thermistor.
The invention also provides a projection method working in a low-temperature environment, which comprises the following steps,
providing the DLP projector;
determining whether the DLP projector is in a low temperature environment;
if the DLP projector is in a low-temperature environment, the digital micromirror element is preheated by the first ceramic heater before being started, and after the digital micromirror element is preheated to the normal working temperature, the preheating of the first ceramic heater is stopped and the digital micromirror element is started.
As a preferable aspect of the projection method for low-temperature environment operation, if the DLP projector is in a low-temperature environment, the fluorescent wheel is preheated by the second ceramic heater before being started, and after the fluorescent wheel is preheated to its normal operating temperature, the preheating of the second ceramic heater is stopped and the fluorescent wheel is started.
As a preferable scheme of the projection method for low-temperature environment operation, if the DLP projector is in a low-temperature environment, the color wheel is preheated by the third ceramic heater before being started, and after the color wheel is preheated to its normal operating temperature, the preheating of the third ceramic heater is stopped and the color wheel is started.
Compared with the prior art, the digital micromirror element, the fluorescent wheel and the color wheel can be heated at low temperature and can normally work by preheating the digital micromirror element through the first ceramic heater, preheating the fluorescent wheel through the second ceramic heater and preheating the color wheel through the third ceramic heater, thereby ensuring that the DLP projector can work at low temperature and ensuring the output of images and light sources.
In addition to the technical problems solved by the present invention, the technical features constituting the technical solutions, and the advantageous effects brought by the technical features of the technical solutions described above, other technical problems solved by the present invention, other technical features included in the technical solutions, and advantageous effects brought by the technical features will be described in further detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram according to an embodiment of the present invention.
Detailed Description
The invention will be described in further detail below with reference to specific embodiments and drawings. Here, the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, a DLP projector operating in a low temperature environment is shown.
The DLP projector comprises a Digital Micromirror Device (DMD), a first ceramic heater (2), a fluorescent wheel (3), a second ceramic heater (4), a color wheel (5), a third ceramic heater (6), a temperature measuring device (7) and the like.
The pair of first ceramic heaters 2 is located at the digital micromirror element 1. The first ceramic heater 2 may be disposed on a heat sink of the dmd 1. The first ceramic heater 2 is used for preheating the digital micromirror element 1 before starting in a low temperature environment.
The pair of second ceramic heaters 4 is located at the fluorescent wheel 3. The second ceramic heater 4 may be arranged on a mounting bracket of the fluorescent wheel 3. The second ceramic heater 4 is used for preheating the fluorescent wheel 3 before starting in a low-temperature environment.
The third pair of ceramic heaters 6 is located at the color wheel 5. The third ceramic heater 6 may be arranged on a mounting bracket of the color wheel 5. The third ceramic heater 6 is used for preheating the color wheel 5 before starting in a low-temperature environment.
The temperature measuring device 7 is used for sensing the ambient temperature of the DLP projector to determine whether the DLP projector is in a low-temperature environment. The temperature measuring device 7 is a thermistor. The ambient temperature is determined by software to detect the voltage of the thermistor, with different temperatures corresponding to different preheating times.
The use method of the DLP projector specifically comprises the following steps:
the DLP projector is provided.
Determining whether the DLP projector is in a low temperature environment.
If the DLP projector is in a low temperature environment, the dmd 1 is preheated by the first ceramic heater 2 before being activated, and after the dmd 1 is preheated to its normal operating temperature, the preheating of the first ceramic heater 2 is stopped and the dmd 1 is activated.
If the DLP projector is in a low temperature environment, the fluorescent wheel 3 is preheated by the second ceramic heater 4 before being started, and after the fluorescent wheel 3 is preheated to the normal working temperature, the preheating of the second ceramic heater 4 is stopped and the fluorescent wheel 3 is started.
If the DLP projector is in a low temperature environment, the color wheel 5 is preheated by the third ceramic heater 6 before being started, and after the color wheel 5 is preheated to its normal operating temperature, the preheating of the third ceramic heater 6 is stopped and the color wheel 5 is started.
When the temperature of the digital micro-mirror element 1, the fluorescent wheel 3, the color wheel 5 and the like reaches the standard meeting the normal working standard, the normal output of the image and the light source is carried out, thus solving the problem of the low-temperature working of the projector.
The foregoing merely represents embodiments of the invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. A DLP projector working in low temperature environment is characterized in that it comprises,
a Digital Micromirror Device (DMD); and the number of the first and second groups,
and the first ceramic heater is positioned on the digital micro-mirror element and used for preheating the digital micro-mirror element in a low-temperature environment before starting.
2. The DLP projector as claimed in claim 1, further comprising,
a fluorescent wheel; and the number of the first and second groups,
and the second ceramic heater is positioned on the fluorescent wheel and used for preheating the fluorescent wheel in a low-temperature environment before starting.
3. The DLP projector as claimed in claim 1 or 2, further comprising,
a color wheel; and the number of the first and second groups,
and the third ceramic heater is positioned on the color wheel and used for preheating the color wheel before starting in a low-temperature environment.
4. The DLP projector as claimed in claim 1, further comprising,
and the temperature measuring device is used for sensing the ambient temperature of the DLP projector so as to determine whether the DLP projector is in a low-temperature environment.
5. The DLP projector as claimed in claim 4, wherein the temperature measuring device is a thermistor.
6. A projection method working in a low temperature environment is characterized by comprising the following steps,
providing the DLP projector of any of claims 1 to 5;
determining whether the DLP projector is in a low temperature environment;
if the DLP projector is in a low-temperature environment, the digital micromirror element is preheated by the first ceramic heater before being started, and after the digital micromirror element is preheated to the normal working temperature, the preheating of the first ceramic heater is stopped and the digital micromirror element is started.
7. The projection method of claim 6, wherein if the DLP projector is in a low temperature environment, the fluorescent wheel is preheated by the second ceramic heater before being started, and after the fluorescent wheel is preheated to its normal operating temperature, the preheating of the second ceramic heater is stopped and the fluorescent wheel is started.
8. The projection method of claim 6, wherein if the DLP projector is in a low temperature environment, the color wheel is preheated by the third ceramic heater before being started, and after the color wheel is preheated to its normal working temperature, the preheating of the third ceramic heater is stopped and the color wheel is started.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010546417.3A CN111880361A (en) | 2020-06-15 | 2020-06-15 | DLP projector working in low-temperature environment and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010546417.3A CN111880361A (en) | 2020-06-15 | 2020-06-15 | DLP projector working in low-temperature environment and method |
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| CN111880361A true CN111880361A (en) | 2020-11-03 |
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| CN202010546417.3A Pending CN111880361A (en) | 2020-06-15 | 2020-06-15 | DLP projector working in low-temperature environment and method |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0879437A1 (en) * | 1996-02-07 | 1998-11-25 | Light & Sound Design, Ltd. | A programmable light beam shape altering device using programmable micromirrors |
| CN101063797A (en) * | 2006-04-25 | 2007-10-31 | 台达电子工业股份有限公司 | Projection device |
| CN101666967A (en) * | 2009-10-19 | 2010-03-10 | 四川长虹电器股份有限公司 | Device for improving normal operation of DLP projection in low temperature environment and method thereof |
| CN103309001A (en) * | 2012-03-09 | 2013-09-18 | 台达电子工业股份有限公司 | Color wheel module, projection device, and method for switching displaying stereo or flat image |
| JP2015197620A (en) * | 2014-04-02 | 2015-11-09 | 日本電気硝子株式会社 | Fluorescent wheel for projector, and light-emitting device for projector |
| US20160026075A1 (en) * | 2011-01-14 | 2016-01-28 | Delta Electronics, Inc. | Heat dissipation assembly and projection apparatus with the same |
| US20170068151A1 (en) * | 2015-09-09 | 2017-03-09 | Akihisa MIKAWA | Image projection apparatus |
| WO2018103209A1 (en) * | 2016-12-06 | 2018-06-14 | 广景视睿科技（深圳）有限公司 | High-efficiency heat dissipating colour wheel |
| CN210222471U (en) * | 2019-06-24 | 2020-03-31 | 苏州创思得新材料有限公司 | Fluorescent wheel fast dispels heat |
-
2020
- 2020-06-15 CN CN202010546417.3A patent/CN111880361A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0879437A1 (en) * | 1996-02-07 | 1998-11-25 | Light & Sound Design, Ltd. | A programmable light beam shape altering device using programmable micromirrors |
| CN101063797A (en) * | 2006-04-25 | 2007-10-31 | 台达电子工业股份有限公司 | Projection device |
| CN101666967A (en) * | 2009-10-19 | 2010-03-10 | 四川长虹电器股份有限公司 | Device for improving normal operation of DLP projection in low temperature environment and method thereof |
| US20160026075A1 (en) * | 2011-01-14 | 2016-01-28 | Delta Electronics, Inc. | Heat dissipation assembly and projection apparatus with the same |
| CN103309001A (en) * | 2012-03-09 | 2013-09-18 | 台达电子工业股份有限公司 | Color wheel module, projection device, and method for switching displaying stereo or flat image |
| JP2015197620A (en) * | 2014-04-02 | 2015-11-09 | 日本電気硝子株式会社 | Fluorescent wheel for projector, and light-emitting device for projector |
| US20170068151A1 (en) * | 2015-09-09 | 2017-03-09 | Akihisa MIKAWA | Image projection apparatus |
| WO2018103209A1 (en) * | 2016-12-06 | 2018-06-14 | 广景视睿科技（深圳）有限公司 | High-efficiency heat dissipating colour wheel |
| CN210222471U (en) * | 2019-06-24 | 2020-03-31 | 苏州创思得新材料有限公司 | Fluorescent wheel fast dispels heat |
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Application publication date: 20201103 |