CN204286642U - A kind of LASER Light Source working state detection device based on DLP chip - Google Patents
A kind of LASER Light Source working state detection device based on DLP chip Download PDFInfo
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- CN204286642U CN204286642U CN201420858488.7U CN201420858488U CN204286642U CN 204286642 U CN204286642 U CN 204286642U CN 201420858488 U CN201420858488 U CN 201420858488U CN 204286642 U CN204286642 U CN 204286642U
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Abstract
The utility model discloses a kind of LASER Light Source working state detection device based on DLP chip, it comprises LASER Light Source temperature detection device, signal converter, controller and heat abstractor; LASER Light Source temperature detection device is arranged in the LASER Light Source group of laser projection device to be detected, for detecting LASER Light Source group temperature signal to be detected; Signal converter is connected with described LASER Light Source temperature detection device, and the temperature signal for being detected by described LASER Light Source temperature detection device converts the discernible signal of controller to; Controller is connected with signal converter, for receiving the temperature signal of described signal converter conversion and controlling heat abstractor startup when the temperature signal of correspondence is abnormal.The utility model is gathered temperature accurately by LASER Light Source temperature detection device, controls heat abstractor to the cooling of LASER Light Source group, and with the detection of LASER Light Source temperature detection device to LASER Light Source temperature, guarantees the normal safe work of LASER Light Source.
Description
Technical field
The utility model relates to a kind of LASER Light Source working state detection device, relates to a kind of LASER Light Source working state detection device based on DLP chip specifically.
Background technology
Conventional projectors take bulb as light source, only has 3000 hours serviceable life, more changes the bulb and keeps in repair the very large drawback of existence.And ultrahigh pressure mercury lamp bulb is mercurous, the bulb process produced and change has greater environmental impacts.And there is following shortcoming with the projector equipment that LED and LD is light source, LED: brightness is low; LD: red expressive force is poor.
And the LASER Light Source life-span can reach 20000 hours, and optical maser wavelength has the feature can selected with EO-1 hyperion brightness, therefore shows image and has larger colour gamut, and have very high color saturation.And the laser projection of 100 cun is more much lower than flat panel TV price, the production more environmental protection of LASER Light Source.Gather above many merits, laser display technology of new generation receives much concern.Current global laser display industry is in industrialization early stage, and also there is certain technical foundation in China in laser display technology, and therefore China is faced with the major opportunity developing laser display industry.
And along with the exploitation of laser product, the high heat problem discharged in laser use procedure has also occurred.First the rising of temperature directly causes decline the serviceable life of complete machine, and the plated film of colour wheel, light source and eyeglass all can accelerated deterioration; Component damage; The heat ageing of material; Low melting point weld cracking, solder joint come off; Job performance reduction etc.Secondly also cause very large impact to safety, insulating property are degenerated; The loose hidden danger such as holding fire hazardous of not going out of heat that machine intimate is a large amount of.
Summary of the invention
In view of the defect that prior art exists, the purpose of this utility model to provide a kind of novel LASER Light Source working state detection device based on DLP chip, this device is gathered temperature accurately by LASER Light Source temperature detection device, control heat abstractor to lower the temperature to LASER Light Source group, and with the detection of LASER Light Source temperature detection device to LASER Light Source temperature, guarantee the normal safe work of LASER Light Source.
To achieve these goals, the technical solution of the utility model:
Based on a LASER Light Source working state detection device for DLP chip, be applied in laser projection device, it is characterized in that:
Comprise LASER Light Source temperature detection device, signal converter, controller and heat abstractor;
Described LASER Light Source temperature detection device is arranged in the LASER Light Source group of laser projection device to be detected, for detecting LASER Light Source group temperature signal to be detected;
Described signal converter is connected with described LASER Light Source temperature detection device, and the temperature signal for being detected by described LASER Light Source temperature detection device converts the discernible signal of controller to;
Described controller is connected with described signal converter, for receiving the temperature signal of described signal converter conversion and controlling heat abstractor startup when the temperature signal of correspondence is abnormal.
Further, described LASER Light Source temperature detection device set-up mode is that one_to_one corresponding is arranged on the temperature sensor in each LASER Light Source group to be detected or arranges a temperature sensor between every two groups of LASER Light Source groups.
Described LASER Light Source temperature detection device is also arranged on the dmd chip of laser projection device simultaneously.
Further, described signal converter is AD conversion chip.
Further, the described controller temperature signal comprised for sending signal converter exports the control circuit of corresponding pwm control signal and controls according to pwm control signal the driving circuit that heat abstractor carries out heat radiation speed governing driving.
Preferably, abnormal information, carrying out carrying out in speed governing driving process according to temperature signal change control heat abstractor, is shown on the display screen of laser projection device by being arranged at inner fault alarm display circuit by described controller.
Described controller is DLP chip.
Further, described heat abstractor is PWM fan.
Compared with prior art, the beneficial effects of the utility model:
The temperature value of temperature sensor feedback is converted to digital signal by signal converter-A/D chip by the utility model, heat abstractor-PWM fan is controlled according to the temperature read by controller-DLP chip, control heat abstractor to the cooling of LASER Light Source group, ensure that laser projection device is in normal operating conditions all the time; Time simultaneously outside the temperature range of the temperature that LASER Light Source group detects when laser projection device normally works, by abnormal alarm display circuit, safety instruction is carried out to user.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Fig. 2 is the utility model embodiment 1 structural representation;
Fig. 3 is the utility model embodiment 2 structural representation;
Fig. 4 is the utility model embodiment 2 topology layout schematic diagram.
In figure: 11, LASER Light Source group, 12, LASER Light Source group 2,13, LASER Light Source group 3,14, LASER Light Source group 4,15, dmd chip, 20, circuit board, 21, temperature sensor 1,22, temperature sensor 2,23, temperature sensor 3,24, AD conversion chip, 25, DLP chip.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the utility model is further elaborated.
As shown in Figure 1, in view of the importance that laser projection device monitoring temperature and heat control, the utility model devises a kind of LASER Light Source working state detection device of DLP chip, comprises LASER Light Source temperature detection device, signal converter, controller and heat abstractor.
As shown in Figure 2, described LASER Light Source temperature detection device is preferably temperature sensor, and it is arranged in each LASER Light Source group of laser projection device to be detected respectively, each LASER Light Source group temperature signal that corresponding detection is to be detected; With described LASER Light Source temperature detection device connection signal converter-AD conversion chip, convert each temperature signal detected to controller discernible signal and deliver to controller; Controller-DLP the chip be connected with described signal converter, the temperature signal of real-time reception AD conversion chip conversion, and radiating treatment is carried out in the startup of control heat abstractor when temperature signal is abnormal.
Further, described heat abstractor is PWM fan.
Further, the described controller temperature signal comprised for sending signal converter exports the control circuit of corresponding pwm control signal and controls according to pwm control signal the driving circuit that heat abstractor carries out heat radiation speed governing driving.
Preferably, abnormal information, carrying out carrying out in speed governing driving process according to temperature signal change control heat abstractor, is shown on the display screen of laser projection device by being arranged at inner fault alarm display circuit by described controller.
As shown in Figure 3, as a rule, the Lights section of laser projection device is made up of more than 1 group or 1 group LASER Light Source group, and being divided into single or multiple direction provides light source, and basic is a direction, and each direction at least arranges more than 1 group LASER Light Source group.Simultaneously, from DLP chip treatment effect and treatment effeciency, described LASER Light Source temperature detection device is preferably temperature sensor, its correspondence is arranged on LASER Light Source direction, therefore need to make at least to be arranged at a temperature sensor between every two groups of LASER Light Source groups, in order to detect the temperature signal (this refers to difference signals) of each LASER Light Source group to be detected; Described LASER Light Source temperature detection device is also arranged on the dmd chip of laser projection device simultaneously, for detecting the working temperature of dmd chip, preventing dmd chip to be in overtemperature state, affecting laser projection device and normally work; With described LASER Light Source temperature detection device connection signal converter-AD conversion chip, convert each temperature signal detected to controller discernible digital signal and deliver to controller; Controller-DLP the chip be connected with described signal converter, the temperature signal of real-time reception AD conversion chip conversion, and radiating treatment is carried out in the startup of control heat abstractor when temperature signal abnormal (temperature difference is more than the temperature difference under two groups of LASER Light Source group normal operating conditionss).
Further, described heat abstractor is PWM fan.
Further, the described controller temperature signal comprised for sending signal converter exports the control circuit of corresponding pwm control signal and controls according to pwm control signal the driving circuit that heat abstractor carries out heat radiation speed governing driving, the temperature signal sent as current demand signal converter exceedes default normal range of operation, then control circuit exports corresponding pwm control signal and controls driving circuit, make PWM starting fan and improve rotating speed, accelerating radiating treatment; Otherwise if the temperature signal that front signal converter sends is in default normal range of operation, then control PWM fan reduces rotating speed or stopping.
Preferably, abnormal information, carrying out carrying out in speed governing driving process according to temperature signal change control heat abstractor, is shown on the display screen of laser projection device by being arranged at inner fault alarm display circuit by described controller.
As shown in Figure 4: the light source portion of laser projection device is made up of 4 groups of LASER Light Source groups respectively, being divided into 2 directions provides light source, and each direction arranges 2 groups of LASER Light Source groups respectively.The radiating block of any one group of LASER Light Source group in each direction is respectively arranged (screw is fixed) temperature sensor (as figure temperature sensor 1 is arranged on the radiating block of LASER Light Source group 1; Temperature sensor 1 is arranged on the radiating block of LASER Light Source group 4), set temperature sensor 3 on DMD simultaneously.Temperature sensor 1, temperature sensor 2 and temperature sensor 3 are all connected on A/D chip, and the digital signal changed by A/D chip is at the enterprising row relax of DLP chip.
Such as in view of under standard ambient temperature (25 degree) and calibration power, the temperature of the horizontal BANK of LASER Light Source group is than longitudinal temperature height 2-3 degree.And the LASER Light Source group 1 fault temperature difference is about 7 degree, the LASER Light Source group 2 fault temperature difference is about 5 degree, and LASER Light Source group 1, the 2 simultaneous faults temperature difference is about 12 degree; The same LASER Light Source group 3 fault temperature difference is about 12 degree; The LASER Light Source group 4 fault temperature difference is about 8 degree, and LASER Light Source group 3, the 4 simultaneous faults temperature difference is about 15 degree.
The temperature signal that therefore can feed back according to temperature sensor 1, temperature sensor 2 detects the corresponding temperature difference, thus the LASER Light Source group 1 of correspondence, on LASER Light Source group 2 direction or LASER Light Source group 3, that whether LASER Light Source group on LASER Light Source group 4 direction has light source to damage is not luminous.Thus effective monitoring LASER Light Source is because causing the brightness of product and the generation of safety problem after overheated or the damage of other reason.Ensure laser projection device, the particularly operation of jumbotron laser projection tv safety.
The above; be only the utility model preferably embodiment; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; be equal to according to the technical solution of the utility model and utility model design thereof and replace or change, all should be encompassed within protection domain of the present utility model.
Claims (8)
1., based on a LASER Light Source working state detection device for DLP chip, be applied in laser projection device, it is characterized in that:
Comprise LASER Light Source temperature detection device, signal converter, controller and heat abstractor;
Described LASER Light Source temperature detection device is arranged in the LASER Light Source group of laser projection device to be detected, for detecting LASER Light Source group temperature signal to be detected;
Described signal converter is connected with described LASER Light Source temperature detection device, and the temperature signal for being detected by described LASER Light Source temperature detection device converts the discernible signal of controller to;
Described controller is connected with described signal converter, for receiving the temperature signal of described signal converter conversion and controlling heat abstractor startup when the temperature signal of correspondence is abnormal.
2. the LASER Light Source working state detection device based on DLP chip according to claim 1, is characterized in that:
Described LASER Light Source temperature detection device set-up mode is that one_to_one corresponding is arranged on the temperature sensor in each LASER Light Source group to be detected or arranges a temperature sensor between every two groups of LASER Light Source groups.
3. the LASER Light Source working state detection device based on DLP chip according to claim 2, is characterized in that:
Described LASER Light Source temperature detection device is also arranged on the dmd chip of laser projection device.
4. the LASER Light Source working state detection device based on DLP chip according to claim 1, is characterized in that:
Described signal converter is AD conversion chip.
5. the LASER Light Source working state detection device based on DLP chip according to claim 1, is characterized in that:
The described controller temperature signal comprised for sending signal converter exports the control circuit of corresponding pwm control signal and controls according to pwm control signal the driving circuit that heat abstractor carries out heat radiation speed governing driving.
6. the LASER Light Source working state detection device based on DLP chip according to claim 5, is characterized in that:
Abnormal information, carrying out carrying out in speed governing driving process according to temperature signal change control heat abstractor, is shown on the display screen of laser projection device by being arranged at inner fault alarm display circuit by described controller.
7. the LASER Light Source working state detection device based on DLP chip according to claim 1 or 5 or 6, is characterized in that:
Described controller is DLP chip.
8. the LASER Light Source working state detection device based on DLP chip according to claim 1, is characterized in that:
Described heat abstractor is PWM fan.
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| CN201420858488.7U CN204286642U (en) | 2014-12-30 | 2014-12-30 | A kind of LASER Light Source working state detection device based on DLP chip |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105183042A (en) * | 2015-07-27 | 2015-12-23 | 佛山市南海舒博光电科技有限公司 | Laser lamp intelligent temperature control system |
| CN105763821A (en) * | 2016-03-04 | 2016-07-13 | 四川长虹电器股份有限公司 | Protection method for laser emitter in laser television |
| CN105828055A (en) * | 2016-05-20 | 2016-08-03 | 海信集团有限公司 | Running control method and system of laser projection device |
| CN106885643A (en) * | 2017-04-01 | 2017-06-23 | 青岛海信宽带多媒体技术有限公司 | The temperature computation method and device of laser in a kind of optical module |
| CN109062283A (en) * | 2018-07-20 | 2018-12-21 | 中国电影器材有限责任公司 | A kind of temperature monitoring method and device of dmd chip |
| US10165240B2 (en) | 2016-05-20 | 2018-12-25 | Hisense Co., Ltd. | Apparatus and method for controlling laser projector to operate |
-
2014
- 2014-12-30 CN CN201420858488.7U patent/CN204286642U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105183042A (en) * | 2015-07-27 | 2015-12-23 | 佛山市南海舒博光电科技有限公司 | Laser lamp intelligent temperature control system |
| CN105763821A (en) * | 2016-03-04 | 2016-07-13 | 四川长虹电器股份有限公司 | Protection method for laser emitter in laser television |
| CN105828055A (en) * | 2016-05-20 | 2016-08-03 | 海信集团有限公司 | Running control method and system of laser projection device |
| US10165240B2 (en) | 2016-05-20 | 2018-12-25 | Hisense Co., Ltd. | Apparatus and method for controlling laser projector to operate |
| CN106885643A (en) * | 2017-04-01 | 2017-06-23 | 青岛海信宽带多媒体技术有限公司 | The temperature computation method and device of laser in a kind of optical module |
| CN106885643B (en) * | 2017-04-01 | 2019-09-20 | 青岛海信宽带多媒体技术有限公司 | The temperature computation method and device of laser in a kind of optical module |
| CN109062283A (en) * | 2018-07-20 | 2018-12-21 | 中国电影器材有限责任公司 | A kind of temperature monitoring method and device of dmd chip |
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