CN201440191U - Heating device keeping temperature of liquid crystal module (LCM) and equipment thereof - Google Patents
Heating device keeping temperature of liquid crystal module (LCM) and equipment thereof Download PDFInfo
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- CN201440191U CN201440191U CN2009201339991U CN200920133999U CN201440191U CN 201440191 U CN201440191 U CN 201440191U CN 2009201339991 U CN2009201339991 U CN 2009201339991U CN 200920133999 U CN200920133999 U CN 200920133999U CN 201440191 U CN201440191 U CN 201440191U
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Abstract
The utility model relates to a heating device keeping the temperature of a liquid crystal module (LCM). The heating device comprises a power supply, a control device 1, a heating switch 2 and a heating element 3, wherein the power supply is used for supplying power for the heating device; the control device 1 is used for detecting the environmental temperature and outputting a control signal according to the environmental temperature; the heating switch 2 is controlled to be on/off by the control signal of the control device 1; and the heating element 3 is connected with the heating switch 2 in series between the power end and the ground. The utility model also discloses equipment employing the heating device. With the implementation of the heating device keeping the temperature of the LCM and the equipment, the utility model has the following beneficial effects that as a silver paste resistance is used for heating to keep the temperature in the LCM, the cost is lower; and the LCM can move together with the equipment.
Description
Technical field
The utility model relates to field of liquid crystal display, more particularly, relates to a kind of electro-heat equipment and equipment that keeps liquid crystal display module temperature.
Background technology
Usually, the working temperature of LCDs or display is that certain scope is arranged, be lower than in its environment temperature under-20 ℃ the situation, the liquid crystal in LCDs or the display will lose activity, so the liquid crystal display that is under this temperature will no longer be worked.But in some cases, need these equipment to be lower than operate as normal under-20 ℃ the environment in its temperature again, now also promising these equipment are created a subenvironment that satisfies its requirement, make its operate as normal, for example equipment can be put in the enclosure space that is isolated from the outside, heat this space and make its temperature be higher than environment temperature to get final product.But this method has its shortcoming, not only needs external heat-producing device and power supply, cause its setting, safeguard comparatively complexity, cost is higher, and in a single day sets and just can not move, can only use at fixing point, under the situation that needs use equipment under the mobile status, can not use.
The utility model content
The technical problems to be solved in the utility model is, at higher, the irremovable defective of the above-mentioned cost of prior art, provide a kind of cost lower, movably keep the electro-heat equipment and the equipment of liquid crystal display module temperature.
The technical scheme that its technical matters that solves the utility model adopts is: construct a kind of electro-heat equipment that keeps liquid crystal display module temperature, be included as the power supply of its power supply, comprise the testing environment temperature and according to the control device 1 of described environment temperature output control signal, be subjected to the control signal of described control device 1 control its heating switch 2 that is switched on or switched off and and described heating switch 2 be serially connected in heater 3 between power end and the ground.
In electro-heat equipment described in the utility model, described heater 3 comprises the resistance that is arranged in the described module.
In electro-heat equipment described in the utility model, described heater 3 comprises silver slurry resistance, and described silver slurry resistance is evenly distributed on the backlight of described module.
In electro-heat equipment described in the utility model, the shape of described silver slurry resistance comprises the serpentine that is distributed on the described backlight.
In electro-heat equipment described in the utility model, described control device 1 comprises ambient temperature value is converted to the temperature sensor of magnitude of voltage, with the magnitude of voltage of described ambient temperature value conversion and a reference voltage relatively and export the comparer of control signal according to comparative result.
In electro-heat equipment described in the utility model, described temperature sensor comprises the thermistor of negative temperature coefficient, and described comparer comprises the operational amplifier of open loop.
In electro-heat equipment described in the utility model, described heating switch 2 comprises transistor, and described transistorized base stage is connected with described comparator output terminal, its grounded emitter, its collector is connected with described heater 3 one ends, and the other end of described heater 3 is connected with described power end.
In electro-heat equipment described in the utility model, the resistance value of described heater 3 comprises 60 ohm-200 ohm.
The utility model has also disclosed a kind of equipment, comprise the liquid crystal display module, also comprise electro-heat equipment, described electro-heat equipment comprise the testing environment temperature and according to the control device 1 of described environment temperature output control signal, be subjected to the control signal of described control device 1 control its heating switch 2 that is switched on or switched off and and described heating switch 2 be serially connected in heater 3 between power end and the ground; Described heater 3 comprises silver slurry resistance, and described silver slurry resistance is evenly distributed on the serpentine on the backlight of described module, and its resistance value comprises 60 ohm-200 ohm; Described control device 1 comprises ambient temperature value is converted to the temperature sensor of magnitude of voltage, with the magnitude of voltage of described ambient temperature value conversion and a reference voltage relatively and export the comparer of control signal according to comparative result; Described temperature sensor comprises the thermistor of negative temperature coefficient, and described comparer comprises the operational amplifier of open loop; Described heating switch 2 comprises transistor, and described transistorized base stage is connected with described comparator output terminal, its grounded emitter, and its collector is connected with described heater 3 one ends, and the other end of described heater 3 is connected with described power end.
Implement the electro-heat equipment and the equipment of maintenance liquid crystal display module temperature of the present utility model, have following beneficial effect: owing to adopt silver slurry resistance heating to keep temperature in described liquid crystal display module inside, so its cost is lower, and mobile with this equipment.
Description of drawings
Fig. 1 is the structural representation of electro-heat equipment in a kind of electro-heat equipment that keeps liquid crystal display module temperature of the utility model and the apparatus embodiments;
Fig. 2 is the shape synoptic diagram of silver slurry resistance on backlight among the described embodiment;
Fig. 3 is the circuit theory diagrams of electro-heat equipment among the described embodiment.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is described further.
As shown in Figure 1, in a kind of electro-heat equipment and apparatus embodiments that keeps liquid crystal display module temperature of the utility model, this electro-heat equipment comprises control device 1, heating switch 2 and heater 3.Wherein, control device 1 is used to detect the environment temperature of its place environment, and according to the above-mentioned environment temperature output control signal that detects, this control signal is transported to the control end of above-mentioned heating switch 2, this heating switch 2 also comprises two switch terminals, control heating switch 2 closed or disconnect, when detected environment temperature lower, in the time of need keeping its temperature to the heating of liquid crystal display module, above-mentioned heating switch 2 closures; Higher when detected environment temperature, when not needing the liquid crystal display module heated, above-mentioned heating switch 2 disconnects.By among Fig. 1 as can be seen, the switch terminals of above-mentioned heating switch 2 and heater 3 are serially connected between the power end and ground into its power supply, when above-mentioned heating switch 2 is closed, electric current passes through the switch terminal of heater 3, heating switch 2 to ground by power end, form a complete current return, therefore, above-mentioned heater 3 beginning heating powers; When above-mentioned heating switch 2 disconnected, heater 3 did not have current return, therefore, can not generate heat.
In the present embodiment, above-mentioned heater 3 comprises the resistance that is arranged in the described module.More specifically, this heater 3 is a silver slurry resistance (promptly starching the resistance that forms certain shape and obtain on a supporter by silver), and this silver slurry resistance is evenly distributed on the backlight of above-mentioned liquid crystal display module, and its shape is a serpentine.As shown in Figure 2, comprise backlight 4 and silver slurry resistance R 1 among Fig. 2, the serpentine among Fig. 2 is positioned at vertical direction, and in other embodiments, above-mentioned serpentine also can be some distortion in the horizontal direction or serpentine, for example can be sine wave shape or the like
In the present embodiment, control device 1 comprises ambient temperature value is converted to the temperature sensor of magnitude of voltage and with the magnitude of voltage of described ambient temperature value conversion and a reference voltage relatively and export the comparer of control signal according to comparative result.Wherein, the said temperature sensor comprises the thermistor of negative temperature coefficient, and above-mentioned comparer comprises the operational amplifier that is connected to open loop situations.Heating switch 2 comprises transistor, and described transistorized base stage is connected with described comparator output terminal, its grounded emitter, and its collector is connected with described heater 3 one ends, and the other end of described heater 3 is connected with power end.
Fig. 2 shows the electrical schematic diagram of electro-heat equipment in the present embodiment, and in Fig. 2, electro-heat equipment comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 1, thermistor NTC1, operational amplifier U1A and triode Q1.Wherein, resistance R 1 is the above-mentioned heating resistor that is evenly distributed on the backlight, and promptly heater 3; Thermistor NTC1 is the thermistor of above-mentioned negative temperature coefficient, i.e. temperature sensor; Operational amplifier U1A is above-mentioned comparer; Triode Q1 is above-mentioned heating switch 2.In Fig. 2, the line work principles illustrated is as follows: resistance R 2 and thermistor NTC1 form pressure sampling circuit, and are connected to the in-phase input end of above-mentioned operational amplifier U1A; Resistance R 3 and resistance R 4 are formed the dividing potential drop reference circuit, and are connected to the inverting input of above-mentioned operational amplifier U1A; When environment temperature is higher than-20 when spending, the resistance of thermistor NTC1 diminishes, and this moment, the in-phase input end voltage ratio end of oppisite phase voltage of operational amplifier U1A was little, operational amplifier U1A output LOW voltage, not conducting of triode Q1, silver slurry resistance R 1 no current flows through, and therefore can not generate heat.When environment temperature is lower than-20 when spending, it is big that thermistor NTC1 resistance becomes, this moment operational amplifier U1A in-phase input end voltage ratio inverting input voltage height, operational amplifier U1A output HIGH voltage, triode Q1 conducting, silver slurry resistance R 1 has electric current to flow through, therefore heating, keep the temperature of liquid crystal display module to be higher than-20 degree, make its operate as normal.Certainly, in other embodiments, not necessarily to be lower than-20 in environment temperature and just start heating when spending, also can when higher temperature, just start, degree for example-10, can reserve the bigger surplus equipment that makes like this can operate as normal.Regulating resistance R 3 and resistance R 4 forms the value of resistance R 3 and resistance R 4 in the dividing potential drop reference circuits and just can realize the start working adjusting of temperature of above-mentioned electro-heat equipment.
In the present embodiment, the resistance of above-mentioned silver slurry resistance R 1 is 100 ohm, and in other embodiments, this resistance can be chosen between 60 ohm-200 ohm, decides according to the size of the liquid crystal display of described liquid crystal display module and the heat that needs.
Also disclosed a kind of equipment in the present embodiment, this equipment comprises the liquid crystal display module, also comprises the electro-heat equipment in the present embodiment.This electro-heat equipment has above-described every technical characterictic.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (9)
1. electro-heat equipment that keeps liquid crystal display module temperature, be included as the power supply of its power supply, it is characterized in that, comprise the testing environment temperature and according to the control device (1) of described environment temperature output control signal, be subjected to the control signal of described control device (1) control its heating switch (2) that is switched on or switched off and and described heating switch (2) be serially connected in heater (3) between power end and the ground.
2. electro-heat equipment according to claim 1 is characterized in that, described heater (3) comprises the resistance that is arranged in the described module.
3. electro-heat equipment according to claim 2 is characterized in that, described heater (3) comprises silver slurry resistance, and described silver slurry resistance is evenly distributed on the backlight of described module.
4. electro-heat equipment according to claim 3 is characterized in that, the shape of described silver slurry resistance comprises the serpentine that is distributed on the described backlight.
5. electro-heat equipment according to claim 4, it is characterized in that described control device (1) comprises ambient temperature value is converted to the temperature sensor of magnitude of voltage, with the magnitude of voltage of described ambient temperature value conversion and a reference voltage relatively and export the comparer of control signal according to comparative result.
6. electro-heat equipment according to claim 5 is characterized in that described temperature sensor comprises the thermistor of negative temperature coefficient, and described comparer comprises the operational amplifier of open loop.
7. electro-heat equipment according to claim 6, it is characterized in that, described heating switch (2) comprises transistor, described transistorized base stage is connected with described comparator output terminal, its grounded emitter, its collector is connected with described heater (3) one ends, and the other end of described heater (3) is connected with described power end.
8. according to any described electro-heat equipment of claim 1-7, it is characterized in that the resistance value of described heater (3) comprises 60 ohm-200 ohm.
9. an equipment comprises the liquid crystal display module, it is characterized in that, also comprises the electro-heat equipment of maintenance liquid crystal display module temperature as claimed in claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201339991U CN201440191U (en) | 2009-08-04 | 2009-08-04 | Heating device keeping temperature of liquid crystal module (LCM) and equipment thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201339991U CN201440191U (en) | 2009-08-04 | 2009-08-04 | Heating device keeping temperature of liquid crystal module (LCM) and equipment thereof |
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| CN201440191U true CN201440191U (en) | 2010-04-21 |
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| CN2009201339991U Expired - Fee Related CN201440191U (en) | 2009-08-04 | 2009-08-04 | Heating device keeping temperature of liquid crystal module (LCM) and equipment thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102967756A (en) * | 2012-10-26 | 2013-03-13 | 华立仪表集团股份有限公司 | Heating circuit of electric energy meter for low temperature environment |
| CN103412426A (en) * | 2013-07-26 | 2013-11-27 | 北京京东方光电科技有限公司 | Liquid crystal display (LCD) |
| CN103592044A (en) * | 2012-08-16 | 2014-02-19 | 苏州工业园区赫光科技有限公司 | A liquid crystal display module group temperature measurement system |
| 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 |
| WO2014139265A1 (en) * | 2013-03-13 | 2014-09-18 | 中兴通讯股份有限公司 | Heater and chip |
| TWI475372B (en) * | 2012-05-15 | 2015-03-01 | Acer Inc | Power manage apparatus and power managing method thereof |
-
2009
- 2009-08-04 CN CN2009201339991U patent/CN201440191U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI475372B (en) * | 2012-05-15 | 2015-03-01 | Acer Inc | Power manage apparatus and power managing method thereof |
| CN103592044A (en) * | 2012-08-16 | 2014-02-19 | 苏州工业园区赫光科技有限公司 | A liquid crystal display module group temperature measurement system |
| CN102967756A (en) * | 2012-10-26 | 2013-03-13 | 华立仪表集团股份有限公司 | Heating circuit of electric energy meter for low temperature environment |
| CN102967756B (en) * | 2012-10-26 | 2015-09-30 | 华立仪表集团股份有限公司 | A kind of for the electric energy meter heater circuit under low temperature environment |
| 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 |
| WO2014139265A1 (en) * | 2013-03-13 | 2014-09-18 | 中兴通讯股份有限公司 | Heater and chip |
| CN103412426A (en) * | 2013-07-26 | 2013-11-27 | 北京京东方光电科技有限公司 | Liquid crystal display (LCD) |
| CN103412426B (en) * | 2013-07-26 | 2015-09-09 | 北京京东方光电科技有限公司 | A kind of liquid crystal display |
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| Date | Code | Title | Description |
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| 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: 20100421 Termination date: 20170804 |