CN104834162A - Thermal focus losing automatic compensation projector - Google Patents
Thermal focus losing automatic compensation projector Download PDFInfo
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- CN104834162A CN104834162A CN201510186085.1A CN201510186085A CN104834162A CN 104834162 A CN104834162 A CN 104834162A CN 201510186085 A CN201510186085 A CN 201510186085A CN 104834162 A CN104834162 A CN 104834162A
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- focusing
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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
- G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects
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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
- G03B21/142—Adjusting of projection optics
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
- Lens Barrels (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
The invention provides a thermal focus losing automatic compensation projector. The projector comprises at least one group of projection lenses which can move back and forth within a focusing range for focusing, a focusing motor for driving the projection lenses to move, a temperature sensor for detecting the temperature of the projection lenses and outputting temperature signals, and a focusing control module. The focusing control module can determine whether the projector is out of focus according to the temperature signals and pre-specified rules, and outputs a focusing command to the focusing motor when the project is out of focus. The focusing motor drives the projection lenses to move for focusing according to the focusing command so as to obtain the most intelligible projection image. A thermal focus losing automatic compensation focusing system can effectively prevent that a projection image is blurry and a phenomenon of out of focus occurs as a projection lens is affected by temperature.
Description
Technical field
The present invention relates to projector, more particularly, relate to a kind of hot auto-compensation projector out of focus.
Background technology
Because projector belongs to active illuminating equipment, need to adopt bulb or LED or laser could work as light source, and these light sources are all high heaters, even if heat radiation is done good again, projector's internal temperature is also higher than environment temperature, after this just causes projector to use a period of time, projected picture can thicken unclear gradually.Tracing it to its cause, mainly because projection lens and associated components cause the focal length positioning of projection lens (being commonly called as heat runs burnt or hot out of focus) because expanding with heat and contract with cold, needing the back focal length readjusting projection lens that projected picture just can be made again clear.Not too convenient so in actual use, time particularly by projector's suspended ceiling device, need to stand on ladder or on desk and could again focus.So some high-end projection machines are in order to lower the impact of temperature variation, adopting all-metal high-precision configuration part and full glass mirror to make projection lens and relational structure part, sometimes also needing to adopt Glass aspheric eyeglass, but a lot of cost can be increased like this.
Summary of the invention
In view of the foregoing, if the relation that camera lens temperature variation and rear lens focus change can be found out, just by mechanical drive, rear Jiao's adjustment is carried out to camera lens, thus solve hot problem out of focus.Principal character of the present invention is, a temperature sensor is set near camera lens, be used for detecting the temperature value of projection lens, the temperature signal that focusing control module sends according to temperature sensor, focusing order is sent to focusing motor according to predetermined parameter, focusing motor drives at least one arrangement of mirrors sheet to seesaw and focuses, make fuzzy image become clear, thus realize hot automatic compensation function out of focus.Described focusing motor comprises voice coil motor, step motor or servo motor.
The technical solution adopted for the present invention to solve the technical problems is: provide a kind of hot auto-compensation projector out of focus, described projector comprises the projection lens that at least one group can move forward and backward focusing in focusing range, and drives the focusing motor of described projection lens movement; It is characterized in that,
Also comprise the temperature sensor of the temperature for monitoring described projection lens the focusing control module output temperature signal to described projector;
Described focusing control module judges according to described temperature signal and pre-defined rule, and exports focusing order when there is defocusing phenomenon to described focusing motor;
Described focusing motor projection lens according to described focusing command driven moves focusing and obtains projected image the most clearly.
Further, described focusing control module, when each focusing is clear, records the temperature signal that described temperature sensor transmits;
Described pre-defined rule be described focusing control module according to the described temperature signal of record calculate projected image from clear fog gradually time described projection lens the predetermined value that reaches of temperature.Further, focusing parameter corresponding when the temperature that described focusing control module is also preset with described projection lens reaches described predetermined value.
Further, described focusing parameter is the step number of described focusing motor or working time or angular displacement or current value.
Further, described focusing motor comprises voice coil motor or step motor or servo motor.
Further, described temperature sensor is positioned at the surface of described projection lens.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the theory diagram of hot auto-compensation projector out of focus;
Fig. 2 is the focus adjustment method process flow diagram of hot auto-compensation projector out of focus.
Embodiment
As shown in Figure 1, be the theory diagram of heat of the present invention auto-compensation projector out of focus.In the present embodiment, around projection lens 1, be provided with groove (not shown), and the rear Jiao adjustment of the temperature variation of this groove to camera lens is the most responsive.Temperature sensor 11 arranges in a groove, for detecting the temperature of projection lens 1.In the present embodiment, when projected image is clear, temperature sensor 11 is triggered and sends corresponding temperature signal to focusing control module 2.Understandably, in various embodiments, the position that the temperature variation of different projection lens is the most responsive to rear Jiao's adjustment of camera lens may be different, and now, temperature sensor is placed in the most responsive position of influence of temperature change by correspondence.
Focusing control module 2 records the temperature signal that temperature sensor 11 sends, and the temperature variation calculating projection lens 1 according to temperature signal over time reaches predetermined value, now, projected image starts to thicken gradually, and focusing control module 2 need export focusing order to focusing motor 3.
The focusing parameter different from the predetermined value that temperature variation reaches also is prestored in focusing control module 2.Understandably, in use, along with the lengthening of service time, the temperature of projection lens 1 is different along with the difference of service time for projector.By auto-compensation focusing system of the present invention, projection temperature sensor 11 sends temperature signal when projected image is clear at every turn, focusing control module 2 records the temperature signal that projection temperature sensor 11 sends at every turn, and as the reference temperature triggered next time when auto-compensation is focused.Focusing control module 2 calculates according to different temperature signals the different predetermined values that temperature variation reaches, and different predetermined value is to there being different focusing parameters.
That is, focusing control module 2 calculates according to the temperature value of projection lens 1 when projected image is clear the predetermined value that temperature variation reaches, and when temperature reaches predetermined value, the form that the focusing parameter that prestore corresponding with this predetermined value is ordered to focus is exported to motor 3 of focusing.
In the present invention, when the temperature variation of projection lens 1 reaches predetermined value, projected image starts to thicken gradually.In the present embodiment, the focusing parameter of all predetermined values and correspondence is all obtained by a large amount of experimental datas, can make corresponding amendment according to factors such as the serviceable lifes of projector self.
After focusing motor 3 receives focusing order, according to receiving predetermined focusing parameter, driving rear Jiao of projection lens 1 movable within the scope of adjustable focus, making projected image focus.It should be noted that, predetermined focusing parameter is within the scope of the adjustable focus of projection lens 1.Focusing parameter is the step number of focusing motor 3 or the driving current value of working time or angular displacement or focusing motor 3.
When making projected image focus after motor 3 of focusing is focused, temperature sensor 11 again sends temperature signal and focusing control module 2 records this temperature signal, and as reference temperature during triggering next time auto-compensation focusing.
As can be seen from above-described embodiment, the heat auto-compensation focusing system out of focus of projector of the present invention, by arranging a temperature sensor at projection lens annex, the rear Jiao adjustment of temperature variation to camera lens of this position is the most responsive is optimal setting positions, the focusing component of camera lens arranges a focusing motor, focusing motor can drive and moves on to before and after at least one arrangement of mirrors sheet and carry out focus operations, and focusing control module carries out rear Jiao's adjustment for motor of focusing.When each focusing is clear, the temperature signal that focusing module record temperature sensor transmits, after a period of time (a few minutes or dozens of minutes), when focusing module calculates (now projected image is fuzzy gradually) when camera lens temperature variation reaches predetermined value from the temperature signal that temperature sensor transmits, focusing order is assigned to focusing motor, make focusing motor adjust rear lens focus (this preset parameter obtains by great number tested data) by preset parameter, make projected image focus; If more after a period of time, focusing module calculates temperature variation when reaching predetermined value again from the signal that temperature sensor spreads out of, and again can send focusing order and focus, how change like this, projected image can be made clear all the time regardless of temperature.It is the most obvious that this method can well solve in the heat problem out of focus, particularly projection lens of projection lens effect when having plastic cement aspherical lens; In automatic focusing system, the method is the preferred plan solving hot problem out of focus.
Fig. 2 is the focus adjustment method process flow diagram of hot auto-compensation projector out of focus.As shown in Figure 2, in the present embodiment, time by S200, projected image focus.
Step S201, detects the temperature value that projection lens is current, and output temperature signal.
Step S202, according to temperature signal and predefined rule, calculates described temperature signal when reaching predetermined value, sending focusing order; Specifically, predefine rule comprises the predetermined value that described temperature signal can reach through the set time, and the focusing parameter corresponding with predetermined value.Understandably, different according to described temperature signal, described predetermined value is corresponding different.When temperature signal reaches predetermined value, illustrate that projected image starts to thicken gradually, need to send focusing order, and comprise focusing parameter in focusing order.
Step S203, according to focusing order, focuses to rear Jiao of projection lens, makes projected image clear within the scope of adjustable focus; In the present invention, adopt focusing motor to drive projection lens to focus, focusing parameter can be the step number of focusing motor or the driving current value of working time or angular displacement or focusing motor.Focusing motor can be voice coil motor or step motor or servo motor.
Claims (6)
1. hot auto-compensation projector out of focus, described projector comprises the projection lens that at least one group can move forward and backward focusing in focusing range, and drives the focusing motor of described projection lens movement; It is characterized in that, also comprising the temperature sensor of the temperature for monitoring described projection lens the focusing control module output temperature signal to described projector; Described focusing control module judges according to described temperature signal and pre-defined rule, and exports focusing order when there is defocusing phenomenon to described focusing motor; Described focusing motor projection lens according to described focusing command driven moves focusing and obtains projected image the most clearly.
2. heat according to claim 1 auto-compensation projector out of focus, is characterized in that, described focusing control module, when each focusing is clear, records the temperature signal that described temperature sensor transmits; Described pre-defined rule be described focusing control module according to the described temperature signal of record calculate projected image from clear fog gradually time described projection lens the predetermined value that reaches of temperature.
3. according to the arbitrary described heat auto-compensation projector out of focus of claim 1 or 2, it is characterized in that, focusing parameter corresponding when the temperature that described focusing control module is also preset with described projection lens reaches described predetermined value.
4. heat according to claim 3 auto-compensation projector out of focus, is characterized in that, described focusing parameter is the step number of described focusing motor or working time or angular displacement or current value.
5. heat according to claim 1 auto-compensation projector out of focus, is characterized in that, described focusing motor comprises voice coil motor or step motor or servo motor.
6. heat according to claim 1 auto-compensation projector out of focus, it is characterized in that, described temperature sensor is positioned at the surface of described projection lens.
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| CN201510186085.1A CN104834162A (en) | 2015-04-17 | 2015-04-17 | Thermal focus losing automatic compensation projector |
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| CN201510186085.1A CN104834162A (en) | 2015-04-17 | 2015-04-17 | Thermal focus losing automatic compensation projector |
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| CN201510186085.1A Pending CN104834162A (en) | 2015-04-17 | 2015-04-17 | Thermal focus losing automatic compensation projector |
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Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319815A (en) * | 2015-11-23 | 2016-02-10 | 西安中科晶像光电科技有限公司 | Intelligent focusing system capable of avoiding lens blur of projector |
| WO2016165143A1 (en) * | 2015-04-17 | 2016-10-20 | 神画科技（深圳）有限公司 | Thermal out-of-focus automatic compensation projector |
| CN107037670A (en) * | 2017-04-27 | 2017-08-11 | 青岛海信宽带多媒体技术有限公司 | One kind projection definition method of adjustment and projector equipment |
| CN107111095A (en) * | 2016-09-05 | 2017-08-29 | 深圳市大疆创新科技有限公司 | Camera lens module |
| CN107229176A (en) * | 2017-05-26 | 2017-10-03 | 神画科技（深圳）有限公司 | A kind of heat system and method out of focus compensated automatically |
| CN107368122A (en) * | 2017-08-08 | 2017-11-21 | 南京华讯方舟通信设备有限公司 | Laser-projector and for automatic temperature control system therein and control method |
| CN107613281A (en) * | 2017-09-29 | 2018-01-19 | 无锡昊瑜节能环保设备有限公司 | A kind of projecting apparatus adaptively adjusted |
| CN107613282A (en) * | 2017-09-29 | 2018-01-19 | 无锡昊瑜节能环保设备有限公司 | The projection angle method of adjustment of the projecting apparatus adaptively adjusted |
| CN107911678A (en) * | 2017-12-07 | 2018-04-13 | 成都市极米科技有限公司 | Heat compensation method, device and projector equipment out of focus |
| CN108769534A (en) * | 2018-06-29 | 2018-11-06 | 努比亚技术有限公司 | A kind of focalization method and terminal |
| WO2018214153A1 (en) * | 2017-05-26 | 2018-11-29 | 神画科技（深圳）有限公司 | Automated compensation system and method for heat-caused defocusing |
| CN109120910A (en) * | 2018-10-26 | 2019-01-01 | 四川长虹电器股份有限公司 | A method of projector lens focusing is compensated based on temperature detection |
| CN109324463A (en) * | 2017-07-31 | 2019-02-12 | 中强光电股份有限公司 | Projector and projection correction method thereof |
| WO2019085260A1 (en) * | 2017-11-02 | 2019-05-09 | 深圳光峰科技股份有限公司 | Autofocus system and method, and projection device |
| CN109871219A (en) * | 2019-01-04 | 2019-06-11 | 信利光电股份有限公司 | A kind of the high/low temperature method for burn-recording and system of camera |
| CN110769216A (en) * | 2018-08-28 | 2020-02-07 | 成都极米科技股份有限公司 | Projector hot focus-running judging method and projector |
| CN110784698A (en) * | 2019-10-31 | 2020-02-11 | 峰米(北京)科技有限公司 | Thermal defocus compensation method, storage medium and projection equipment |
| CN111443556A (en) * | 2019-01-16 | 2020-07-24 | 中强光电股份有限公司 | Projector and its focus adjustment method |
| CN112731743A (en) * | 2020-12-30 | 2021-04-30 | 宜宾市极米光电有限公司 | Projector and water mist removing method |
| CN112828477A (en) * | 2021-02-01 | 2021-05-25 | 大族激光科技产业集团股份有限公司 | Focus displacement compensation method, device, equipment and storage medium |
| CN113391503A (en) * | 2020-03-11 | 2021-09-14 | 苏州佳世达光电有限公司 | Projector and projection method |
| CN115061334A (en) * | 2022-05-19 | 2022-09-16 | 深圳市橙子数字科技有限公司 | Method, lens, system, computer device and medium for solving heat virtual focus |
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Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016165143A1 (en) * | 2015-04-17 | 2016-10-20 | 神画科技（深圳）有限公司 | Thermal out-of-focus automatic compensation projector |
| CN105319815A (en) * | 2015-11-23 | 2016-02-10 | 西安中科晶像光电科技有限公司 | Intelligent focusing system capable of avoiding lens blur of projector |
| WO2018040098A1 (en) * | 2016-09-05 | 2018-03-08 | 深圳市大疆创新科技有限公司 | Lens module |
| CN107111095A (en) * | 2016-09-05 | 2017-08-29 | 深圳市大疆创新科技有限公司 | Camera lens module |
| CN107037670A (en) * | 2017-04-27 | 2017-08-11 | 青岛海信宽带多媒体技术有限公司 | One kind projection definition method of adjustment and projector equipment |
| WO2018214153A1 (en) * | 2017-05-26 | 2018-11-29 | 神画科技（深圳）有限公司 | Automated compensation system and method for heat-caused defocusing |
| CN107229176A (en) * | 2017-05-26 | 2017-10-03 | 神画科技（深圳）有限公司 | A kind of heat system and method out of focus compensated automatically |
| CN109324463A (en) * | 2017-07-31 | 2019-02-12 | 中强光电股份有限公司 | Projector and projection correction method thereof |
| CN107368122A (en) * | 2017-08-08 | 2017-11-21 | 南京华讯方舟通信设备有限公司 | Laser-projector and for automatic temperature control system therein and control method |
| CN107613281A (en) * | 2017-09-29 | 2018-01-19 | 无锡昊瑜节能环保设备有限公司 | A kind of projecting apparatus adaptively adjusted |
| CN107613282A (en) * | 2017-09-29 | 2018-01-19 | 无锡昊瑜节能环保设备有限公司 | The projection angle method of adjustment of the projecting apparatus adaptively adjusted |
| WO2019085260A1 (en) * | 2017-11-02 | 2019-05-09 | 深圳光峰科技股份有限公司 | Autofocus system and method, and projection device |
| CN107911678A (en) * | 2017-12-07 | 2018-04-13 | 成都市极米科技有限公司 | Heat compensation method, device and projector equipment out of focus |
| CN107911678B (en) * | 2017-12-07 | 2019-12-17 | 成都极米科技股份有限公司 | Thermal defocus compensation method and device and projection equipment |
| CN108769534A (en) * | 2018-06-29 | 2018-11-06 | 努比亚技术有限公司 | A kind of focalization method and terminal |
| CN110769216A (en) * | 2018-08-28 | 2020-02-07 | 成都极米科技股份有限公司 | Projector hot focus-running judging method and projector |
| CN109120910A (en) * | 2018-10-26 | 2019-01-01 | 四川长虹电器股份有限公司 | A method of projector lens focusing is compensated based on temperature detection |
| CN109871219A (en) * | 2019-01-04 | 2019-06-11 | 信利光电股份有限公司 | A kind of the high/low temperature method for burn-recording and system of camera |
| CN111443556A (en) * | 2019-01-16 | 2020-07-24 | 中强光电股份有限公司 | Projector and its focus adjustment method |
| CN110784698A (en) * | 2019-10-31 | 2020-02-11 | 峰米(北京)科技有限公司 | Thermal defocus compensation method, storage medium and projection equipment |
| CN110784698B (en) * | 2019-10-31 | 2021-09-21 | 峰米(北京)科技有限公司 | Thermal defocus compensation method, storage medium and projection equipment |
| CN113391503A (en) * | 2020-03-11 | 2021-09-14 | 苏州佳世达光电有限公司 | Projector and projection method |
| CN112731743A (en) * | 2020-12-30 | 2021-04-30 | 宜宾市极米光电有限公司 | Projector and water mist removing method |
| CN112828477A (en) * | 2021-02-01 | 2021-05-25 | 大族激光科技产业集团股份有限公司 | Focus displacement compensation method, device, equipment and storage medium |
| CN115061334A (en) * | 2022-05-19 | 2022-09-16 | 深圳市橙子数字科技有限公司 | Method, lens, system, computer device and medium for solving heat virtual focus |
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Application publication date: 20150812 |