阅读说明：本技术 一种高可靠性的投影光源温控系统 (High-reliability projection light source temperature control system ) 是由 杜正婷 吕军锋 陈鹏 胡建青 王进 李鹏 宋新波 袁有志 陈�光 张伟 陈建军 于 2020-10-12 设计创作，主要内容包括：本发明提出一种高可靠性的投影光源温控系统,包括TEC、温度传感器、电路控制系统、热沉、投影光源、柔性导热带和风扇,投影光源布置在柔性导热带的一面,TEC的冷端贴紧柔性导热带的另一面并吸收其热量,TEC的热端设有热沉,TEC的热量释放至热沉中,再通过风扇散热；电路控制系统输出驱动投影光源的电流信号,以获得投影光源的不同光强输出；电路控制系统读取温度传感器采集的温度信号,计算TEC的工作温度,输出驱动TEC的控制电流信号。本发明将投影光源产生的热量通过TEC制冷,高效、精确控制投影光源的温度,实现在高环境温度下投影光源的高发光效率和高可靠性,适用性广,具有极大商业化潜力,易于批量化生产。(The invention provides a high-reliability projection light source temperature control system, which comprises a TEC, a temperature sensor, a circuit control system, a heat sink, a projection light source, a flexible heat conduction band and a fan, wherein the projection light source is arranged on one surface of the flexible heat conduction band, the cold end of the TEC is tightly attached to the other surface of the flexible heat conduction band and absorbs the heat of the flexible heat conduction band, the hot end of the TEC is provided with the heat sink, and the heat of the TEC is released into the heat sink and then is radiated by the fan; the circuit control system outputs current signals for driving the projection light source so as to obtain different light intensity outputs of the projection light source; and the circuit control system reads the temperature signal acquired by the temperature sensor, calculates the working temperature of the TEC and outputs a control current signal for driving the TEC. The heat generated by the projection light source is refrigerated by the TEC, the temperature of the projection light source is efficiently and accurately controlled, the high luminous efficiency and the high reliability of the projection light source at high environmental temperature are realized, the applicability is wide, the great commercial potential is realized, and the mass production is easy.)

1. The utility model provides a projection light source temperature control system of high reliability which characterized in that includes: TEC (1), temperature sensor (2), circuit control system (3), heat sink (4), projection light source (5), flexible heat conduction band (6) and fan (7), wherein: the projection light source (5) is arranged on one surface of the flexible heat conduction belt (6) in a clinging mode, the temperature sensor (2) is arranged on one side of the projection light source (5), and the temperature sensor (2) is used for collecting the temperature of the side of the projection light source (5);

the TEC (1) is arranged on the other surface of the flexible heat conduction belt (6), the cold end of the TEC (1) is tightly attached to the surface of the flexible heat conduction belt (6), and the cold end of the TEC (1) absorbs the heat of the flexible heat conduction belt (6); the heat sink (4) is arranged at the heat end of the TEC (1), the heat end of the TEC (1) is embedded into the heat sink (4), the heat end of the TEC (1) releases the heat inside the TEC to the heat sink (4), the heat sink (4) is used for transferring the heat generated by the heat end of the TEC (1), and a fan (7) used for enhancing convection heat dissipation is arranged on one side, away from the TEC (1), of the heat sink (4);

the circuit control system (3) is arranged between the flexible heat conduction belt (6) and the heat sink (4), the circuit control system (3) is connected with the projection light source (5), and the circuit control system (3) generates and outputs a current signal for driving the projection light source (5); the circuit control system (3) is connected with the TEC (1) and the temperature sensor (2), reads a temperature signal collected by the temperature sensor (2), calculates the working temperature of the TEC (1), and outputs a control current signal for driving the TEC (1).

2. The high-reliability projection light source temperature control system according to claim 1, wherein the projection light source (5) includes a high-brightness output projection-dedicated LED.

3. The high reliability projection light source temperature control system according to claim 1 or 2, wherein the projection light source (5) comprises a high power LED packaged with a multi-chip array.

4. The high reliability projection light source temperature control system according to claim 1, wherein the projection light source (5) comprises a high power LD packaged with a multi-chip array.

5. The high-reliability projection light source temperature control system according to claim 1, wherein the projection light source (5) comprises white, yellow, green, red, blue projection light sources.

6. The high-reliability projection light source temperature control system according to claim 1, wherein the circuit control system (3) is an integrated circuit system.

7. The high-reliability projection light source temperature control system according to claim 1 or 6, wherein the circuit control system (3) comprises a field programmable gate array or a single chip microcomputer.

8. The high-reliability projection light source temperature control system according to claim 1, wherein the TEC (1) is fixed by an in-groove press card.

9. The high-reliability projection light source temperature control system according to claim 1 or 8, wherein a clamping groove is formed in the middle of the heat sink (4), the TEC (1) is placed in the clamping groove, and the clamping is performed by a flexible heat conduction band (6) substrate.

Technical Field

The invention relates to the field of illumination temperature control, in particular to a projection light source temperature control system with high reliability.

Background

The existing project of the projection light source is the modes of projection special LED, high power LED array, LD array, etc. The electro-optic conversion efficiency of these light sources is limited by the current state of the art, and only about 30% of the input electrical energy is converted into optical energy, and other non-radiative conversions are converted in the form of heat, thus causing the junction temperature of the projection light source chip to be very high. Meanwhile, the luminous efficiency of the projection light source is reduced along with the increase of the junction temperature.

At present, the heat dissipation of the projection light source mainly adopts a passive heat dissipation method, such as a heat sink, a fan, a heat sink plus a fan. Limited by low efficiency of passive heat dissipation in high temperature environments. Meanwhile, the light efficiency of the projection light source is reduced due to the increase of the temperature, and the service life is shortened.

By adopting the semiconductor cooler TEC, the problem of passive heat dissipation can be solved, and stable temperature control can be obtained. Tec (thermo Electric cooler) is based on the Peltier effect, where an N-type semiconductor and a P-type semiconductor of a semiconductor material are in communication, and the temperature decreases at the electron-hole pair generation end and increases at the electron-hole pair recombination end. The change in current direction will cause the cold and hot ends of the TEC to interchange. A chip of the projection light source is attached to the cold end of the TEC, the active refrigeration mode is adopted, the junction temperature of the projection chip is reduced, the dependence characteristic of the junction temperature on the environment temperature is reduced, and high-reliability work on severe environments is obtained. The hot end of the TEC is connected with the heat sink, so that heat can be led out, and high light efficiency and long service life of the projection light source are realized.

At present, passive heat dissipation is mainly adopted for illumination heat dissipation of the projection light source, and the heat dissipation efficiency is low, so that the working environment temperature of the high-power projection light source is limited, and the highest working temperature is only 50 ℃. The method cannot work under the limit environment. Meanwhile, the junction temperature of the projection light source is increased, so that the luminous efficiency of the projection light source is reduced, and the working reliability of the projection light source is reduced.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a projection light source temperature control system with high reliability, wherein heat generated by a projection light source is refrigerated through a TEC (thermoelectric cooler), so that the temperature of a projection light source chip is efficiently and accurately controlled, and the high luminous efficiency and the high reliability of the projection light source at high environmental temperature are realized.

The technical solution for realizing the purpose of the invention is as follows:

a projection light source temperature control system with high reliability comprises: TEC, temperature sensor, circuit control system, heat sink, projection light source, flexible heat conduction band and fan, wherein: the projection light source is arranged on one surface of the flexible heat conduction belt in a clinging mode, the temperature sensor is arranged on one side of the projection light source, and the temperature sensor is used for collecting the temperature of the side of the projection light source; the TEC is arranged on the other surface of the flexible heat conduction band, the cold end of the TEC is tightly attached to the surface of the flexible heat conduction band, and the cold end of the TEC absorbs the heat of the flexible heat conduction band; the heat sink is arranged at the heat end of the TEC, the heat end of the TEC is embedded into the heat sink, the heat end of the TEC releases the heat inside the TEC into the heat sink, the heat sink is used for transferring the heat generated by the heat end of the TEC, and a fan used for enhancing convection heat dissipation is arranged on one side of the heat sink, which is far away from the TEC; the circuit control system is arranged between the flexible heat conduction belt and the heat sink, connected with the projection light source and used for generating and outputting a current signal for driving the projection light source; the circuit control system is connected with both the TEC and the temperature sensor, reads the temperature signal acquired by the temperature sensor, calculates the working temperature of the TEC and outputs a control current signal for driving the TEC.

Furthermore, the high-reliability projection light source temperature control system provided by the invention has the advantages that the projection light source comprises a projection special LED with high brightness output.

Furthermore, the high-reliability projection light source temperature control system provided by the invention is characterized in that the projection light source comprises a high-power LED packaged with a multi-chip array.

Furthermore, the high-reliability projection light source temperature control system provided by the invention comprises a high-power LD packaged with a multi-chip array.

Furthermore, the high-reliability projection light source temperature control system comprises white, yellow, green, red and blue projection light sources.

Furthermore, the high-reliability projection light source temperature control system is an integrated circuit system.

Furthermore, the high-reliability projection light source temperature control system comprises a field programmable gate array or a single chip microcomputer.

Furthermore, according to the high-reliability projection light source temperature control system, the TEC is fixed in a mode of fixing the in-groove pressure clamp.

Furthermore, the projection light source temperature control system with high reliability is characterized in that a clamping groove is formed in the middle of the heat sink, and the TEC is arranged in the clamping groove and is pressed and clamped by the flexible heat conduction band substrate.

Compared with the prior art, the invention adopting the technical scheme has the following technical effects:

1. the high-reliability projection light source temperature control system provided by the invention adopts the TEC to refrigerate the projection light source, so that the temperature of a projection light source chip is efficiently and accurately controlled.

2. The high-reliability projection light source temperature control system can adapt to extreme environmental temperature, and particularly enables the projection light source to obtain high luminous efficiency and high reliability under the extreme environmental temperature.

3. Compared with a passive heat dissipation system, the high-reliability projection light source temperature control system can achieve higher light efficiency of a projection light source and longer service life of the projection light source.

Drawings

Fig. 1 is a schematic structural diagram of a high-reliability projection light source temperature control system according to the present invention.

Reference signs mean: 1: TEC; 2: a sensor; 3: a circuit control system; 4: a heat sink; 5: a projection light source; 6: a flexible thermally conductive strip; 7: a fan.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

A projection light source temperature control system with high reliability comprises: TEC1, temperature sensor 2, circuit control system 3, heat sink 4, projection light source 5, flexible heat conducting strip 6 and fan 7, wherein: the projection light source 5 is closely arranged on one surface of the flexible heat conduction belt 6, the temperature sensor 2 is arranged on one side of the projection light source 5, and the temperature sensor 2 is used for collecting the temperature of the side of the projection light source 5; the TEC1 is arranged on the other surface of the flexible heat conduction belt 6, the cold end of the TEC1 is attached to the surface of the flexible heat conduction belt 6, and the cold end of the TEC1 absorbs heat of the flexible heat conduction belt 6; the heat sink 4 is arranged at the heat end of the TEC1, the heat end of the TEC1 is embedded into the heat sink 4, the heat end of the TEC1 releases the heat inside the TEC to the heat sink 4, the heat sink 4 is used for transferring the heat generated by the heat end of the TEC1, and a fan 7 for enhancing convection heat dissipation is arranged at one side of the heat sink 4 away from the TEC 1; the circuit control system 3 is positioned between the heat sink 4 and the flexible heat conduction belt 6, the circuit control system 3 is connected with the projection light source 5, and the circuit control system 3 generates and outputs a current signal for driving the projection light source 5; the circuit control system 3 is connected with the TEC1 and the temperature sensor 2, the circuit control system 3 reads a temperature signal acquired by the temperature sensor 2, calculates the working temperature of the TEC1 and outputs a control current signal for driving the TEC 1.

Example 1

A projection light source temperature control system with high reliability comprises a TEC1, a temperature sensor 2, a circuit control system 3, a heat sink 4, a projection light source 5, a flexible heat conduction belt 6 and a fan 7.

The projection light source 5 is a special projection LED with high brightness output, the projection light source 5 is closely arranged on one surface of the flexible heat conduction belt 6, the temperature sensor 2 is arranged on one side of the projection light source 5, and the temperature sensor 2 is used for collecting the temperature of the side of the projection light source 5.

The TEC1 is arranged on the other surface of the flexible heat conduction belt 6, the cold end of the TEC1 is attached to the surface of the flexible heat conduction belt 6, and the cold end of the TEC1 absorbs heat of the flexible heat conduction belt 6. The heat sink 4 is arranged at the heat end of the TEC1, the heat end of the TEC1 is embedded into the heat sink 4, the heat end of the TEC1 releases the heat inside the TEC to the heat sink 4, the heat sink 4 is used for transferring the heat generated by the heat end of the TEC1, and a fan 7 used for enhancing convection heat dissipation is arranged on one side of the heat sink 4 away from the TEC 1. The TEC1 adopts a fixing mode of pressing and clamping in the groove, a clamping groove is formed in the middle of the heat sink 4, the TEC1 is arranged in the clamping groove, and the clamping is performed by the flexible heat conduction band 6 substrate, so that the shearing force of the TEC1 can be reduced, and the reliability of the TEC1 is improved.

The circuit control system 3 is an integrated circuit system, the circuit control system 3 is located between the heat sink 4 and the flexible heat conduction belt 6, the circuit control system 3 is connected with the projection light source 5, the circuit control system 3 generates and outputs a current signal for driving the projection light source 5, the light intensity output of the projection light source 5 is adjustable, and modulation of projection display gray scale is obtained. The circuit control system 3 is connected with the TEC1 and the temperature sensor 2, the circuit control system 3 reads a temperature signal acquired by the temperature sensor 2, calculates the working temperature of the TEC1 and outputs a control current signal for driving the TEC 1.

Example 2

A projection light source temperature control system with high reliability comprises a TEC1, a temperature sensor 2, a circuit control system 3, a heat sink 4, a projection light source 5, a flexible heat conduction belt 6 and a fan 7.

The projection light source 5 comprises a high-power LED packaged with a multi-chip array, the projection light source 5 is arranged on one surface of the flexible heat conducting strip 6 in a clinging mode, the temperature sensor 2 is arranged on one side of the projection light source 5, and the temperature sensor 2 is used for collecting the temperature of the side of the projection light source 5.

The TEC1 is arranged on the other surface of the flexible heat conduction belt 6, the cold end of the TEC1 is attached to the surface of the flexible heat conduction belt 6, and the cold end of the TEC1 absorbs heat of the flexible heat conduction belt 6. The heat sink 4 is arranged at the heat end of the TEC1, the heat end of the TEC1 is embedded into the heat sink 4, the heat end of the TEC1 releases the heat inside the TEC to the heat sink 4, the heat sink 4 is used for transferring the heat generated by the heat end of the TEC1, and a fan 7 used for enhancing convection heat dissipation is arranged on one side of the heat sink 4 away from the TEC 1. The TEC1 adopts a fixing mode of pressing and clamping in a groove, a clamping groove is formed in the middle of the heat sink 4, the TEC1 is arranged in the clamping groove, and the clamping is carried out by the substrate of the flexible heat conduction band 6.

The circuit control system 3 comprises a field programmable gate array, the circuit control system 3 is positioned between the heat sink 4 and the flexible heat conduction belt 6, the circuit control system 3 is connected with the projection light source 5, and the circuit control system 3 generates and outputs a current signal for driving the projection light source 5. The circuit control system 3 is connected with the TEC1 and the temperature sensor 2, the circuit control system 3 reads a temperature signal acquired by the temperature sensor 2, calculates the working temperature of the TEC1 and outputs a control current signal for driving the TEC 1.

Example 3

A projection light source temperature control system with high reliability comprises a TEC1, a temperature sensor 2, a circuit control system 3, a heat sink 4, a projection light source 5, a flexible heat conduction belt 6 and a fan 7.

The projection light source 5 comprises a high-power LD packaged with a multi-chip array, the projection light source 5 is arranged on one surface of the flexible heat conducting strip 6 in a clinging mode, the temperature sensor 2 is arranged on one side of the projection light source 5, and the temperature sensor 2 is used for collecting the temperature of the side of the projection light source 5.

The TEC1 is arranged on the other surface of the flexible heat conduction belt 6, the cold end of the TEC1 is attached to the surface of the flexible heat conduction belt 6, and the cold end of the TEC1 absorbs heat of the flexible heat conduction belt 6. The heat sink 4 is arranged at the heat end of the TEC1, the heat end of the TEC1 is embedded into the heat sink 4, the heat end of the TEC1 releases the heat inside the TEC to the heat sink 4, the heat sink 4 is used for transferring the heat generated by the heat end of the TEC1, and a fan 7 used for enhancing convection heat dissipation is arranged on one side of the heat sink 4 away from the TEC 1. The TEC1 adopts a fixing mode of pressing and clamping in a groove, a clamping groove is formed in the middle of the heat sink 4, the TEC1 is arranged in the clamping groove, and the clamping is carried out by the substrate of the flexible heat conduction band 6.

The circuit control system 3 comprises a single chip microcomputer, the circuit control system 3 is located between the heat sink 4 and the flexible heat conduction belt 6, the circuit control system 3 is connected with the projection light source 5, and the circuit control system 3 generates and outputs current signals for driving the projection light source 5. The circuit control system 3 is connected with the TEC1 and the temperature sensor 2, the circuit control system 3 reads a temperature signal acquired by the temperature sensor 2, calculates the working temperature of the TEC1 and outputs a control current signal for driving the TEC 1.

The foregoing is directed to embodiments of the present invention and, more particularly, to a method and apparatus for controlling a power converter in a power converter, including a power converter, a power.