CN201876747U - Temperature-control heater - Google Patents
Temperature-control heater Download PDFInfo
- Publication number
- CN201876747U CN201876747U CN2010206684721U CN201020668472U CN201876747U CN 201876747 U CN201876747 U CN 201876747U CN 2010206684721 U CN2010206684721 U CN 2010206684721U CN 201020668472 U CN201020668472 U CN 201020668472U CN 201876747 U CN201876747 U CN 201876747U
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- electrically connected
- port
- direct supply
- resistance
- voltage comparator
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Abstract
The utility model relates to a temperature-control heater, which is used for a liquid crystal display module and is characterized in that the anode of a direct-current power supply is directly and electrically connected with the anode of a heating plate, the cathode of the direct-current power supply is electrically connected with one end of an automatic temperature control circuit and the other end of the automatic temperature control circuit is electrically connected with the cathode of the heating plate. When the ambient temperature is lower than the set temperature, the temperature-control heater can be automatically turned on to heat a liquid crystal display; and when the ambient temperature is higher than the set temperature, the temperature-control heater can be automatically turned off to save power.
Description
Technical field
The utility model relates to a kind of Temperature controlled heater, is applied on the liquid crystal display device module, can open automatically to be the LCD heating when environment temperature is lower than design temperature, and close with power saving automatically when environment temperature is higher than design temperature.
Background technology
At present, liquid crystal display device module need increase well heater when being lower than-20 ℃ of uses in environment temperature liquid crystal display device module could guarantee the LCD operate as normal, known well heater control mode is: when environment temperature is lower than-20 ℃, manually open heater button, well heater begins when environment temperature is higher than-20 ℃, manually to cut out heater button for the LCD heating, to reach purpose of power saving, this manual control switch's well heater obviously makes complex operation and inconvenience.
The utility model content
In order to overcome existing well heater in operational inconvenience, the utility model provides a kind of Temperature controlled heater, this Temperature controlled heater can open or close under the temperature of setting automatically according to the variation of environment temperature, do not need to have accomplished artificial interference, fully automatically control.
The technical scheme that its technical matters that solves the utility model adopts is: in liquid crystal display device module, the positive pole of direct supply directly is electrically connected with the anodal of heating plate, negative pole is electrically connected with automatic temperature control circuit one end, and the automatic temperature control circuit other end is connected with the negative electricity of heating plate.
In the described automatic temperature control circuit, negative tempperature coefficient thermistor (resistance RT) is in parallel with resistance (resistance R5), and the one end is electrically connected with described dc power anode, the other end is electrically connected with the IN-port of voltage comparator (preferred LM329), reverse input end divider resistance (resistance R6) end also is electrically connected with the IN-port of voltage comparator, the other end is electrically connected with described dc power cathode, in-phase input end divider resistance (resistance R7) and in-phase input end resistance (resistance R8) series connection, the other end of in-phase input end dividing potential drop divider resistance is electrically connected with dc power anode, the other end of in-phase input end resistance is electrically connected with described dc power cathode, the two tie point is electrically connected voltage comparator with the IN+ port of voltage comparator OUT port is electrically connected with an end of pull-up resistor and an end of pull down resistor, the other end of pull-up resistor is electrically connected with described dc power anode, the other end of pull down resistor is connected with the negative electricity of described direct supply, the S port of metal-oxide-semiconductor is connected with the negative electricity of described direct supply, the G port is electrically connected with the OUT port of voltage comparator, and the D port is connected with described heating plate negative electricity.
If the output voltage of described direct supply is V, when environment temperature was higher than-20 ℃, the IN-port of voltage comparator and the voltage of IN+ port were respectively:
V
IN-＝V·R6/[R6+RT·R5/(RT+R5)]；V
IN+＝V·R8/(R7+R8)。
If this moment V
IN-＞V
IN+, the OUT port voltage V of voltage comparator
OUTBe high level, the conducting critical voltage V that requires between two ports of the G of this voltage ratio metal-oxide-semiconductor, S
SGV
OUT＞V
SG, so the resistance R between the S of metal-oxide-semiconductor and two ports of D
SDThe convergence infinity, so the negative pole of described heating plate disconnects, heating plate is not worked.
When environment temperature was lower than-20 ℃, the resistance RT of described negative tempperature coefficient thermistor increased rapidly, learnt V according to above-mentioned formula
IN-Reduce rapidly, and cause V
IN-＜V
IN+, the OUT port voltage V of described voltage comparator
OUTJust therefore become low level, the conducting critical voltage V that requires between two ports of the G of the described metal-oxide-semiconductor of this voltage ratio, S
SGLittle, i.e. V
OUT＜V
SG, so the resistance R between two ports of S, D of described metal-oxide-semiconductor
SDConvergence 0, thereby the negative pole of described heating plate and the connection of described dc power cathode, heating plate powers up work.
The beneficial effects of the utility model are can make liquid crystal display device module open or close well heater automatically according to the variation of environment temperature, thereby save manually-operated, for operation offers convenience.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a structural drawing of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Among the figure: 1. direct supply, 2. temperature-control circuit, 3. heating plate, 4. negative tempperature coefficient thermistor (resistance RT), 5. resistance (resistance R5), 6. reverse input end divider resistance (resistance R6), 7. in-phase input end divider resistance (resistance R7), 8. in-phase input end resistance (resistance R8), 9. voltage comparator, 10. pull-up resistor, 11. pull down resistors, 12.MOS pipe.
Embodiment
In Fig. 1, the positive pole of direct supply 1 directly is electrically connected with the anodal of heating plate 3, and the negative pole of direct supply 1 is electrically connected with automatic temperature control circuit 2 one ends, and the other end of automatic temperature control circuit 2 is connected with the negative electricity of heating plate 3.
In Fig. 2, negative tempperature coefficient thermistor 4 is in parallel with resistance 5, and the one end is connected with direct supply 1 positive electrical, the other end is electrically connected with the IN-port of voltage comparator 9, reverse input end divider resistance 6 one ends also are electrically connected with the IN-port of voltage comparator 9, the other end is connected with direct supply 1 negative electricity, in-phase input end divider resistance 7 and 8 series connection of in-phase input end resistance, the other end of in-phase input end dividing potential drop divider resistance 7 is connected with direct supply 1 positive electrical, the other end of in-phase input end resistance 8 is connected with direct supply 1 negative electricity, the two tie point is electrically connected voltage comparator 9 with the IN+ port of voltage comparator 9 OUT port is electrically connected with an end of pull-up resistor 10 and an end of pull down resistor 11, the other end of pull-up resistor 10 is connected with direct supply 1 positive electrical, the other end of pull down resistor 11 is connected with the negative electricity of direct supply 1, the S port of metal-oxide-semiconductor 12 is connected with the negative electricity of direct supply 1, the G port is electrically connected with the OUT port of voltage comparator 9, and the D port is connected with heating plate 3 negative electricities.
Claims (2)
1. Temperature controlled heater, it is characterized in that: in liquid crystal display device module, the positive pole of direct supply (1) directly is electrically connected with the anodal of heating plate (3), negative pole is electrically connected with automatic temperature control circuit (2) one ends, and automatic temperature control circuit (2) other end is connected with the negative electricity of heating plate (3).
2. a kind of Temperature controlled heater according to claim 1, it is characterized in that: in described automatic temperature control circuit (2), negative tempperature coefficient thermistor (4) is in parallel with resistance (5), and the one end is connected with described direct supply (1) positive electrical, the other end is electrically connected with the IN-port of voltage comparator (9), reverse input end divider resistance (6) one ends also are electrically connected with the IN-port of voltage comparator (9), the other end described with direct supply (1) negative electricity is connected, in-phase input end divider resistance (7) and in-phase input end resistance (8) series connection, the other end of in-phase input end dividing potential drop divider resistance (7) is connected with described direct supply (1) positive electrical, the other end of in-phase input end resistance (8) is connected with described direct supply (1) negative electricity, the two tie point is electrically connected voltage comparator (9) with the IN+ port of voltage comparator (9) OUT port is electrically connected with an end of pull-up resistor (10) and an end of pull down resistor (11), the other end of pull-up resistor (10) is connected with direct supply (1) positive electrical, the other end of pull down resistor (11) is connected with the negative electricity of described direct supply (1), the S port of metal-oxide-semiconductor (12) is connected with the negative electricity of described direct supply (1), the G port is electrically connected with the OUT port of voltage comparator (9), and the D port is connected with described heating plate (3) negative electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206684721U CN201876747U (en) | 2010-12-09 | 2010-12-09 | Temperature-control heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206684721U CN201876747U (en) | 2010-12-09 | 2010-12-09 | Temperature-control heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201876747U true CN201876747U (en) | 2011-06-22 |
Family
ID=44164661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206684721U Expired - Fee Related CN201876747U (en) | 2010-12-09 | 2010-12-09 | Temperature-control heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201876747U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749742A (en) * | 2011-04-19 | 2012-10-24 | 青岛海信电器股份有限公司 | Device for regulating temperature gradient of liquid crystal module and method as well as liquid crystal module |
| CN103974472A (en) * | 2013-02-01 | 2014-08-06 | 研祥智能科技股份有限公司 | Heating film and heating device |
| CN104317331A (en) * | 2014-09-19 | 2015-01-28 | 北京中电兴发科技有限公司 | Pre-heating control device and pre-heating control method based on optical MOS relay |
| CN105867048A (en) * | 2016-06-02 | 2016-08-17 | 哈尔滨市科佳通用机电有限公司 | Optical fiber coupling type infrared laser light source |
| CN106054696A (en) * | 2016-05-27 | 2016-10-26 | 京东方科技集团股份有限公司 | Heating control circuit and liquid crystal display device |
| CN109375670A (en) * | 2018-08-30 | 2019-02-22 | 佛山市宇森医疗器械有限公司 | Closed loop thermal control system and closed loop thermal control method without temperature sensor |
| CN117648009A (en) * | 2024-01-29 | 2024-03-05 | 杭州海创自动化有限公司 | Ship video display system |
-
2010
- 2010-12-09 CN CN2010206684721U patent/CN201876747U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749742A (en) * | 2011-04-19 | 2012-10-24 | 青岛海信电器股份有限公司 | Device for regulating temperature gradient of liquid crystal module and method as well as liquid crystal module |
| CN103974472A (en) * | 2013-02-01 | 2014-08-06 | 研祥智能科技股份有限公司 | Heating film and heating device |
| CN103974472B (en) * | 2013-02-01 | 2017-08-15 | 研祥智能科技股份有限公司 | A kind of heating film and heater |
| CN104317331A (en) * | 2014-09-19 | 2015-01-28 | 北京中电兴发科技有限公司 | Pre-heating control device and pre-heating control method based on optical MOS relay |
| CN106054696A (en) * | 2016-05-27 | 2016-10-26 | 京东方科技集团股份有限公司 | Heating control circuit and liquid crystal display device |
| CN105867048A (en) * | 2016-06-02 | 2016-08-17 | 哈尔滨市科佳通用机电有限公司 | Optical fiber coupling type infrared laser light source |
| CN105867048B (en) * | 2016-06-02 | 2019-01-18 | 哈尔滨市科佳通用机电股份有限公司 | A kind of fiber coupling formula infrared laser light source |
| CN109375670A (en) * | 2018-08-30 | 2019-02-22 | 佛山市宇森医疗器械有限公司 | Closed loop thermal control system and closed loop thermal control method without temperature sensor |
| CN117648009A (en) * | 2024-01-29 | 2024-03-05 | 杭州海创自动化有限公司 | Ship video display system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20161209 |