CN102938236A - Liquid crystal display device - Google Patents
Liquid crystal display device Download PDFInfo
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- CN102938236A CN102938236A CN2012104051018A CN201210405101A CN102938236A CN 102938236 A CN102938236 A CN 102938236A CN 2012104051018 A CN2012104051018 A CN 2012104051018A CN 201210405101 A CN201210405101 A CN 201210405101A CN 102938236 A CN102938236 A CN 102938236A
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- crystal indicator
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Abstract
The embodiment of the invention discloses a liquid crystal display device, relates to the technical field of a liquid crystal display, and solves the problem that the existing liquid crystal display device cannot work normally under the environment at a temperature which is lower than -20 DEG C. According to the embodiment of the invention, a transparent heating unit for heating a liquid crystal material in a liquid crystal display panel is arranged between the liquid crystal display panel and a back light source, so as to heat the liquid crystal material; and the liquid crystal display device can work normally under the environment at the temperature which is lower than -20 DEG C so that the liquid crystal display using the liquid crystal display device can work normally under the low-temperature environment at the temperature which is lower than -20 DEG C.
Description
Technical field
The present invention relates to technical field of liquid crystal display, relate in particular to a kind of liquid crystal indicator.
Background technology
Liquid crystal display is to utilize the special light electrical property that liquid crystal material has and make, and the available liquid crystal display mainly comprises liquid crystal indicator, control circuit and product casing, and liquid crystal indicator mainly comprises display panels and backlight.
The liquid crystal display of using in the office space generally speaking, because environment temperature is substantially fixing, can guarantee the temperature requirement (between-20 ℃ and 70 ℃) of liquid crystal display normal operation.But, liquid crystal display in some industry control industries and the use of other particular places, because environment temperature can occur to fluctuate more on a large scale, might be able to not satisfy the temperature requirement of liquid crystal display normal operation, for example be lower than-20 ℃ or be higher than 70 ℃, cause the liquid crystal display cisco unity malfunction.This is that if exceed this scope, liquid crystal state can disappear, thereby causes the liquid crystal display cisco unity malfunction because liquid crystal material only just can present liquid crystal state-20 ℃～70 ℃ temperature range.
Summary of the invention
Embodiments of the invention provide a kind of liquid crystal indicator, have solved the problem of cisco unity malfunction under the low temperature environment that the available liquid crystal display is being lower than-20 ℃.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of liquid crystal indicator comprises display panels and backlight, is provided with for the transparent heating unit that heats described display panels liquid crystal material between described display panels and described backlight.
Further, described transparent heating unit is resistance film.
Further, described resistance film is formed directly into a described display panels side relative with described backlight.
Further, the shape of described transparent heating unit is identical with the shape of described display panels and described backlight opposite face.
Further, described liquid crystal indicator also comprises temperature sensor, controller, heat driven device and heating power supply; Described controller is electrically connected with described temperature sensor and described heat driven device, and described heating power supply and described transparent heating unit are electrically connected with described heat driven device; Described temperature sensor is for detection of the environment temperature of described display panels environment of living in; Described controller when be used for determining that environment temperature that described temperature sensor detects is lower than temperature threshold, transmits control signal to described heat driven device; Described heat driven device is used for controlling described heating power supply to described transparent heating unit power supply, to heat the liquid crystal material in the described display panels according to described control signal.
Further, described temperature sensor is thermistor.
Further, described liquid crystal indicator also comprises level shifting circuit, be arranged between described thermistor and the described controller, be used for the resistance value of described thermistor is converted to the required level of described controller, described level shifting circuit comprises power supply, divider resistance and differential amplifier; Described power supply, described thermistor and the series connection of described divider resistance; The reverse input end of described differential amplifier is connected with the negative electricity of described power supply; The position that described thermistor and described divider resistance are electrically connected mutually is electrically connected with the positive input of described differential amplifier; The output terminal of described differential amplifier is electrically connected with described controller.
Further, described controller and described heat driven device are arranged on the PCB.
In the liquid crystal indicator that the embodiment of the invention provides, owing between display panels and backlight, be provided with the transparent heating unit for heating fluid LCD panel liquid crystal material, can heat liquid crystal material like this, can work so that liquid crystal indicator can be lower than under-20 ℃ the low temperature environment, thereby so that use the liquid crystal display of this liquid crystal indicator being lower than under-20 ℃ the low temperature environment to work.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention, the accompanying drawing of required use was done to introduce simply during the below will describe embodiment.
The diagrammatic cross-section of a kind of liquid crystal indicator that Fig. 1 provides for the embodiment of the invention;
The block scheme of the another kind of liquid crystal indicator middle part subassembly that Fig. 2 provides for the embodiment of the invention;
The synoptic diagram of the connection thermistor that Fig. 3 provides for the embodiment of the invention and the level shifting circuit of controller.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described.
The embodiment of the invention provides a kind of liquid crystal indicator, as shown in Figure 1, comprises display panels 11 and backlight 13, is provided with the transparent heating unit 12 for heating fluid LCD panel liquid crystal material between display panels 11 and backlight 13.
In the liquid crystal indicator that the embodiment of the invention provides, owing between display panels 11 and backlight 13, be provided with the transparent heating unit for heating fluid LCD panel liquid crystal material, can heat liquid crystal material like this, can work so that liquid crystal indicator can be lower than under-20 ℃ the low temperature environment, thereby so that use the liquid crystal display of this liquid crystal indicator being lower than under-20 ℃ the low temperature environment to work.
In above-described embodiment, transparent heating unit 12 can be resistance film, so that heating is fast, heating effect is good.
Resistance film can be formed directly into the relative side of display panels 11 and backlight 13, so that just can finish the preparation of resistance film in the process of making display panels, has simplified the preparation technology of resistance film.
Certainly, transparent heating unit is not limited to resistance film, also can be that known to those skilled in the art other realized the device of heating liquid crystal material function.
In above-described embodiment, the shape of transparent heating unit 12 can be identical with the shape of display panels 11 and backlight 13 opposite faces, so that transparent heating unit 12 can heat equably to liquid crystal material.
In above-described embodiment, liquid crystal indicator can also comprise temperature sensor 21, controller 22, heat driven device 23 and heating power supply 24 as shown in Figure 2, controller 22 is electrically connected with temperature sensor 21 and heat driven device 23, and heating power supply 24 and transparent heating unit 12 are electrically connected with heat driven device 23.Wherein, temperature sensor 21 is for detection of the environment temperature of display panels 11 environment of living in; Controller 22 when be used for determining that environment temperature that temperature sensor 21 detects is lower than temperature threshold, transmits control signal to heat driven device 23; Heat driven device 23 is used for according to control signal control heating power supply 24 to transparent heating unit 12 power supplies, with the liquid crystal material in the heating fluid LCD panel.
Because temperature sensor 21 can detect the environment temperature of display panels 11 environment of living in, when the environment temperature that controller 22 definite temperature sensors 21 detect is lower than temperature threshold, transmit control signal to heat driven device 23, heat driven device 23 just can be controlled heating power supply 24 to transparent heating unit 12 power supplies with the liquid crystal material in the heating fluid LCD panel 11, so that heating process realizes robotization according to control signal.
In above-described embodiment, temperature sensor can be thermistor.Because thermistor is relatively responsive to environment temperature, so that temperature sensor testing environment temperature more accurately.
In above-described embodiment, liquid crystal indicator can also comprise level shifting circuit 3 as shown in Figure 3, it is arranged between thermistor 33 (temperature sensor) and the controller 22, is used for resistance value with thermistor 33 and is converted to the required level of controller 22.
By level shifting circuit 3 is set, can realize the incoming level coupling of temperature signal level and the controller 22 of thermistor 33 detections.
In above-described embodiment, controller 22 can be arranged on the PCB (Printed Circuit Board, printed circuit board (PCB)) with heat driven device 23, can so that liquid crystal indicator is more integrated, have less size.
The above; be the specific embodiment of the present invention only, but protection scope of the present invention is not limited to this, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (8)
1. a liquid crystal indicator comprises display panels and backlight, it is characterized in that, is provided with for the transparent heating unit that heats described display panels liquid crystal material between described display panels and described backlight.
2. liquid crystal indicator according to claim 1 is characterized in that, described transparent heating unit is resistance film.
3. liquid crystal indicator according to claim 2 is characterized in that, described resistance film is formed directly into a described display panels side relative with described backlight.
4. liquid crystal indicator according to claim 1 is characterized in that, the shape of described transparent heating unit is identical with the shape of described display panels and described backlight opposite face.
5. liquid crystal indicator according to claim 1 is characterized in that, also comprises temperature sensor, controller, heat driven device and heating power supply;
Described controller is electrically connected with described temperature sensor and described heat driven device, and described heating power supply and described transparent heating unit are electrically connected with described heat driven device;
Described temperature sensor is for detection of the environment temperature of described display panels environment of living in;
Described controller when be used for determining that environment temperature that described temperature sensor detects is lower than temperature threshold, transmits control signal to described heat driven device;
Described heat driven device is used for controlling described heating power supply to described transparent heating unit power supply, to heat the liquid crystal material in the described display panels according to described control signal.
6. liquid crystal indicator according to claim 5 is characterized in that, described temperature sensor is thermistor.
7. liquid crystal indicator according to claim 6 is characterized in that, also comprises level shifting circuit, is arranged between described thermistor and the described controller, is used for the resistance value of described thermistor is converted to the required level of described controller;
Described level shifting circuit comprises power supply, divider resistance and differential amplifier; Described power supply, described thermistor and the series connection of described divider resistance; The reverse input end of described differential amplifier is connected with the negative electricity of described power supply; The position that described thermistor and described divider resistance are electrically connected mutually is electrically connected with the positive input of described differential amplifier; The output terminal of described differential amplifier is electrically connected with described controller.
8. according to claim 5 to 6 each described liquid crystal indicators, it is characterized in that described controller and described heat driven device are arranged on the PCB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104051018A CN102938236A (en) | 2012-10-22 | 2012-10-22 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104051018A CN102938236A (en) | 2012-10-22 | 2012-10-22 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102938236A true CN102938236A (en) | 2013-02-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104051018A Pending CN102938236A (en) | 2012-10-22 | 2012-10-22 | Liquid crystal display device |
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| CN (1) | CN102938236A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579897A (en) * | 2019-09-17 | 2019-12-17 | 中国电子科技集团公司第五十五研究所 | liquid crystal display assembly heating method in low-temperature and low-pressure environment |
| CN113204136A (en) * | 2021-05-07 | 2021-08-03 | 杭州佳显科技有限公司 | Heating temperature compensation type liquid crystal display |
Citations (7)
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|---|---|---|---|---|
| JPH11288318A (en) * | 1998-04-02 | 1999-10-19 | Kokusai Electric Co Ltd | Liquid crystal display device |
| US20080100791A1 (en) * | 2006-10-27 | 2008-05-01 | Innocom Technology (Shenzhen) Co., Ltd.; Innolux Display Corp. | Liquid crystal display device having temperature control system |
| CN201298123Y (en) * | 2008-10-28 | 2009-08-26 | 厦门赛特勒电子有限公司 | LCD module |
| CN101655620A (en) * | 2008-08-22 | 2010-02-24 | 清华大学 | Liquid crystal display screen |
| CN101655621A (en) * | 2008-08-20 | 2010-02-24 | 和硕联合科技股份有限公司 | Heating module for liquid crystal display and liquid crystal heating method thereof |
| TW201036529A (en) * | 2009-03-25 | 2010-10-01 | Askey Computer Corp | A liquid crystal anti-freeze method and a liquid crystal module using the liquid crystal anti-freeze method |
| CN101995688A (en) * | 2009-08-27 | 2011-03-30 | 厦门立林科技有限公司 | Monochrome liquid crystal display module capable of working at low temperature |
-
2012
- 2012-10-22 CN CN2012104051018A patent/CN102938236A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11288318A (en) * | 1998-04-02 | 1999-10-19 | Kokusai Electric Co Ltd | Liquid crystal display device |
| US20080100791A1 (en) * | 2006-10-27 | 2008-05-01 | Innocom Technology (Shenzhen) Co., Ltd.; Innolux Display Corp. | Liquid crystal display device having temperature control system |
| CN101655621A (en) * | 2008-08-20 | 2010-02-24 | 和硕联合科技股份有限公司 | Heating module for liquid crystal display and liquid crystal heating method thereof |
| CN101655620A (en) * | 2008-08-22 | 2010-02-24 | 清华大学 | Liquid crystal display screen |
| CN201298123Y (en) * | 2008-10-28 | 2009-08-26 | 厦门赛特勒电子有限公司 | LCD module |
| TW201036529A (en) * | 2009-03-25 | 2010-10-01 | Askey Computer Corp | A liquid crystal anti-freeze method and a liquid crystal module using the liquid crystal anti-freeze method |
| CN101995688A (en) * | 2009-08-27 | 2011-03-30 | 厦门立林科技有限公司 | Monochrome liquid crystal display module capable of working at low temperature |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579897A (en) * | 2019-09-17 | 2019-12-17 | 中国电子科技集团公司第五十五研究所 | liquid crystal display assembly heating method in low-temperature and low-pressure environment |
| CN110579897B (en) * | 2019-09-17 | 2022-01-18 | 中国电子科技集团公司第五十五研究所 | Liquid crystal display assembly heating method in low-temperature and low-pressure environment |
| CN113204136A (en) * | 2021-05-07 | 2021-08-03 | 杭州佳显科技有限公司 | Heating temperature compensation type liquid crystal display |
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Application publication date: 20130220 |