CN110579897B - Liquid crystal display assembly heating method in low-temperature and low-pressure environment - Google Patents
Liquid crystal display assembly heating method in low-temperature and low-pressure environment Download PDFInfo
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- CN110579897B CN110579897B CN201910873785.6A CN201910873785A CN110579897B CN 110579897 B CN110579897 B CN 110579897B CN 201910873785 A CN201910873785 A CN 201910873785A CN 110579897 B CN110579897 B CN 110579897B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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Abstract
A heating method of a liquid crystal display assembly in a low-temperature and low-pressure environment is characterized in that an air pressure sensing device and a temperature sensing device are arranged in the liquid crystal display assembly at the same time aiming at the liquid crystal display assembly heated behind a screen, the air pressure sensing device is used for detecting the change of the ambient air pressure value and feeding the change back to a circuit heating control module to perform primary regulation and control on heating power consumption, and the temperature sensing device is used for monitoring the screen temperature in real time and feeding the change back to the circuit heating control module to perform secondary dynamic regulation and control on the heating power consumption. The invention can not only improve the heating reliability under the low-temperature and low-pressure environment, but also save energy and reduce consumption.
Description
Technical Field
The invention relates to a liquid crystal display technology, in particular to a low-temperature liquid crystal display technology of a liquid crystal display assembly heated after a screen, and specifically relates to a heating method of the liquid crystal display assembly in a low-temperature and low-pressure environment.
Background
Liquid crystal display self can't normally work under extreme low temperature environment as an independent individual, and keeps comparatively smooth display effect, and the mode of generally taking is to heating the design to the LCD screen for the liquid crystal display subassembly possesses the ability of low temperature work, and the low temperature heating design about the liquid crystal display subassembly has more ripe scheme at present, including the application of heating glass and auxiliary heating compensation, has improved the heating homogeneity when satisfying liquid crystal display subassembly low temperature work requirement.
The Chinese patent with the patent application number of 201510037704.0 discloses a liquid crystal screen working at low temperature and a heating method thereof, and the liquid crystal screen comprises a liquid crystal display panel, an insulating heat conduction bonding layer, a heating radiation plate and a heat insulation plate which are sequentially stacked, wherein the heating radiation plate and the heat insulation plate are pressed and assembled into an integrated structure, a heating control circuit and a temperature acquisition circuit are integrated on the heat insulation plate, and temperature collectors are distributed on the liquid crystal display panel; the temperature sensor collects temperature information of the liquid crystal display panel, the temperature information is transmitted to the heating control circuit through the temperature collection circuit, the heating control circuit controls the heating radiation plate to work, and the heating radiation plate reduces/improves the temperature of the liquid crystal display panel.
Chinese patent application No. 201110417450.7 discloses a liquid crystal display having low temperature heating compensation and temperature uniformity compensation functions, comprising an outer shell, a front screen assembly, an optical backlight system, and a circuit control module, wherein the front screen assembly comprises a heating layer having low temperature heating function; the periphery of the front screen component is provided with a low-temperature heating temperature uniformity compensation part, two ends of the low-temperature heating temperature uniformity compensation part and two ends of the heating layer are connected with the circuit control module, the low-temperature heating temperature uniformity compensation device has the advantages that the low-temperature heating temperature uniformity compensation and the temperature uniformity compensation function are achieved, the heating layer can enable the central temperature of a screen surface of the liquid crystal display screen in a low-temperature working state and the display effect to meet the use requirements, the temperature uniformity compensation part is mainly used for improving the peripheral temperature of the liquid crystal display screen, the temperature uniformity and the display effect of the low-temperature working screen surface of the liquid crystal display are improved, meanwhile, the low-temperature working energy loss caused by excessive temperature rise of a conventional liquid crystal display to the middle area of the display is avoided, and the total power consumption is saved.
However, the above methods are all implemented for the low-temperature heating function of the liquid crystal display under normal pressure, including the application of circuit design and heating compensation, in practice, the liquid crystal display module often needs to work under low-pressure environment, so as to include three environments of low-temperature low-pressure, normal-temperature low-pressure and high-temperature low-pressure, because the change of the ambient pressure at the liquid crystal display module brings the change of the heat transfer capacity and the heat dissipation capacity of the module inside the module, and further causes the rapid change of the temperature rise condition of the liquid crystal display, if only the conventional temperature collector and the control circuit thereof are used as the only monitoring and control mode of the temperature and the heating power consumption of the panel, the following problems can exist: 1) the screen temperature rapidly rises under the rapid decompression environment, and the temperature collector cannot reach the feedback temperature and timely adjust the heating power consumption, so that the screen temperature is too high, the requirements of energy conservation and consumption reduction are not met, and the risk of losing the function of the liquid crystal screen exists; 2) the temperature collector usually has an upper limit of temperature collection, and if the screen temperature rapidly rises to exceed the upper limit of the temperature collector, the temperature collector can not normally work. Therefore, it becomes a research hotspot nowadays to explore a heating design method of a liquid crystal display module in a low-temperature and low-pressure environment, to ensure excellent low-temperature working quality in a normal-pressure environment and a low-pressure environment, and to reduce heating power consumption.
Disclosure of Invention
The invention aims to provide a heating method of a liquid crystal display assembly in a low-temperature and low-pressure environment, aiming at the problems of the defects and the defects of the heating design method of the existing liquid crystal display assembly in the low-temperature and low-pressure environment, poor heating reliability, large heating power consumption and the like.
The technical scheme of the invention is as follows:
a heating method of a liquid crystal display assembly in a low-temperature and low-pressure environment is mainly used for the liquid crystal display assembly heated behind a screen and is characterized in that an air pressure sensing device and a temperature sensing device are arranged in the liquid crystal display assembly at the same time, the air pressure sensing device is used for detecting the change of the ambient air pressure value and feeding the change back to a circuit heating control module to perform primary regulation and control on heating power consumption, and the temperature sensing device is used for monitoring the screen temperature in real time and feeding the change back to the circuit heating control module to perform secondary dynamic regulation and control on the heating power consumption.
The circuit heating control module is used for controlling the heating power consumption in the first stage, and if the heating power consumption design value in the normal pressure environment is P, the following conditions are adopted:
1) detecting that the ambient air pressure is 69.65KPa +/-2 KPa, and the heating power consumption is regulated to 0.8P at first level;
2) detecting that the ambient air pressure is 57.33KPa +/-2 KPa, and the heating power consumption is regulated to 0.75P at first level;
3) detecting that the ambient air pressure is 30.1KPa +/-2 KPa, and the heating power consumption is regulated to 0.65P at first level;
4) detecting that the ambient air pressure is 11KPa +/-2 KPa, and controlling the heating power consumption to be 0.55P at first level;
5) and detecting that the ambient air pressure is 4.11KPa +/-2 KPa, and controlling the heating power consumption to be 0.5P at first level.
And when the ambient air pressure is detected to be lower than 2KPa, stopping heating regulation. Other full screen heating measures need to be adopted.
The second-level regulation and control of the circuit heating control module on the heating power consumption is that the temperature of the liquid crystal display screen is at a certain designed temperature point T0For heating the boundary point, the actual measured screen temperature of the temperature sensing device is more than or equal to T0When the temperature is lower than T, the heating is switched off, and the measured screen temperature is lower than T0When the process is carried out, heating is carried out; the T is0The temperature is adjusted within the range of minus 10 ℃ to plus 10 ℃ according to different models of liquid crystal screens, different heating structures and different heat dissipation modes.
The invention has the beneficial effects that:
firstly, the feedback of the air pressure sensing device to the ambient air pressure value is utilized to realize the primary regulation and control of the heating power consumption of the liquid crystal display assembly by the circuit heating control module, so that the problem that the screen temperature of the liquid crystal display assembly suddenly rises due to sudden drop of the air pressure is avoided, the normal work of the temperature sensing device is guaranteed, and the risk that the liquid crystal display screen loses functions due to overhigh screen temperature is greatly reduced;
secondly, the heating power consumption of the liquid crystal display assembly is regulated and controlled by the circuit heating control module through real-time feedback of the screen temperature by the temperature sensing device, a heating curve is more finely customized according to the differences of different models of liquid crystal screens, heating structures and heat dissipation modes, the heating efficiency is improved to the maximum extent, and the heating power consumption is reduced.
And the deficiency of the heating design of the liquid crystal display assembly in the low-temperature and low-pressure environment are made up, the heating reliability of the liquid crystal display assembly in the low-temperature and low-pressure environment is improved, and the liquid crystal display assembly can be widely applied to the fields of electronic appliances and the like.
Drawings
Fig. 1 is a schematic diagram of the operation of the present invention.
Detailed Description
The invention is further described below with reference to the figures and examples.
The first embodiment.
As shown in fig. 1.
A heating method of a liquid crystal display assembly in a low-temperature and low-pressure environment is characterized in that an air pressure sensing device and a temperature sensing device are arranged in the liquid crystal display assembly at the same time aiming at the liquid crystal display assembly heated behind a screen, the air pressure sensing device is used for detecting the change of the ambient air pressure value and feeding the change back to a circuit heating control module to perform primary regulation and control on heating power consumption, and the temperature sensing device is used for monitoring the screen temperature in real time and feeding the change back to the circuit heating control module to perform secondary dynamic regulation and control on the heating power consumption.
The method is characterized in that a certain liquid crystal display component is required to normally work under the low-temperature and low-pressure environment of-45 ℃ and 57.33KPa, the design value of heating power consumption under the normal-pressure environment is set as P, and when the air pressure sensing device detects that the ambient air pressure is 57.33KPa +/-2 KPa, the heating power consumption is primarily regulated and controlled to be 0.75P by a circuit heating control module; the liquid crystal display has better low-temperature display performance, can smoothly display at minus 10 ℃, and is provided with a heating demarcation point T0The temperature is-10 deg.C, when the actual screen temperature measured by the temperature sensor is more than or equal to-10 deg.C, the heating is cut off, and when the actual screen temperature is less than-10 deg.C, the heating is implemented.
Example two.
As shown in fig. 1.
A heating method of a liquid crystal display assembly in a low-temperature and low-pressure environment is characterized in that an air pressure sensing device and a temperature sensing device are arranged in the liquid crystal display assembly at the same time aiming at the liquid crystal display assembly heated behind a screen, the air pressure sensing device is used for detecting the change of the ambient air pressure value and feeding the change back to a circuit heating control module to perform primary regulation and control on heating power consumption, and the temperature sensing device is used for monitoring the screen temperature in real time and feeding the change back to the circuit heating control module to perform secondary dynamic regulation and control on the heating power consumption.
The method is characterized in that a certain liquid crystal display component is required to normally work under the low-temperature and low-pressure environment of-40 ℃ and 30.1KPa, the design value of heating power consumption under the normal-pressure environment is set as P, and when the air pressure sensing device detects that the ambient air pressure is 30.1KPa +/-2 KPa, the heating power consumption is primarily regulated and controlled to be 0.65P by a circuit heating control module; the liquid crystal display screen has poor low-temperature display performance, can be smoothly displayed only at the temperature of +10 ℃, and is provided with a heating demarcation point T0Is +10 ℃, and when the actual screen temperature measured by the temperature sensing device is more than or equal to +10 ℃, the heating is disconnected and the temperature is highHeating when the screen temperature is lower than +10 ℃.
Example three.
As shown in fig. 1.
A heating method of a liquid crystal display assembly in a low-temperature and low-pressure environment is characterized in that an air pressure sensing device and a temperature sensing device are arranged in the liquid crystal display assembly at the same time aiming at the liquid crystal display assembly heated behind a screen, the air pressure sensing device is used for detecting the change of the ambient air pressure value and feeding the change back to a circuit heating control module to perform primary regulation and control on heating power consumption, and the temperature sensing device is used for monitoring the screen temperature in real time and feeding the change back to the circuit heating control module to perform secondary dynamic regulation and control on the heating power consumption.
The liquid crystal display component is required to normally work under the low-temperature and low-pressure environment of-45 ℃ and 69.65KPa, the design value of heating power consumption under the normal-pressure environment is set as P, and when the air pressure sensing device detects that the ambient air pressure is 69.65KPa +/-2 KPa, the heating power consumption is primarily regulated and controlled to be 0.8P by the circuit heating control module; the liquid crystal screen can display smoothly at 0 ℃, and a heating demarcation point T is set0The temperature is 0 ℃, when the actual measurement screen temperature of the temperature sensing device is more than or equal to 0 ℃, the heating is disconnected, and when the actual measurement screen temperature is less than 0 ℃, the heating is implemented.
Example four.
As shown in fig. 1.
A heating method of a liquid crystal display assembly in a low-temperature and low-pressure environment is characterized in that an air pressure sensing device and a temperature sensing device are arranged in the liquid crystal display assembly at the same time aiming at the liquid crystal display assembly heated behind a screen, the air pressure sensing device is used for detecting the change of the ambient air pressure value and feeding the change back to a circuit heating control module to perform primary regulation and control on heating power consumption, and the temperature sensing device is used for monitoring the screen temperature in real time and feeding the change back to the circuit heating control module to perform secondary dynamic regulation and control on the heating power consumption.
The method is characterized in that a certain liquid crystal display component is required to normally work under the low-temperature and low-pressure environment of-35 ℃ and 11.0KPa, the design value of heating power consumption under the normal-pressure environment is set as P, and when the air pressure sensing device detects that the ambient air pressure is 11.0KPa +/-2 KPa, the heating power consumption is primarily regulated and controlled to be 0.55P by a circuit heating control module; the liquid crystal display can smoothly display at-5 ℃ and is provided withHeating demarcation point T0The temperature is-5 deg.C, the heating is disconnected when the actual screen temperature of the temperature sensing device is greater than or equal to-5 deg.C, and the heating is carried out when the actual screen temperature is lower than-5 deg.C.
Example five.
As shown in fig. 1.
A heating method of a liquid crystal display assembly in a low-temperature and low-pressure environment is characterized in that an air pressure sensing device and a temperature sensing device are arranged in the liquid crystal display assembly at the same time aiming at the liquid crystal display assembly heated behind a screen, the air pressure sensing device is used for detecting the change of the ambient air pressure value and feeding the change back to a circuit heating control module to perform primary regulation and control on heating power consumption, and the temperature sensing device is used for monitoring the screen temperature in real time and feeding the change back to the circuit heating control module to perform secondary dynamic regulation and control on the heating power consumption.
The method is characterized in that a certain liquid crystal display component is required to normally work under the low-temperature and low-pressure environment of-45 ℃ and 4.11KPa, the design value of heating power consumption under the normal-pressure environment is set as P, and when the air pressure sensing device detects that the ambient air pressure is 4.11KPa +/-2 KPa, the heating power consumption is primarily regulated and controlled to be 0.5P by a circuit heating control module; the liquid crystal screen can display smoothly at the temperature of +5 ℃, and a heating demarcation point T is set0And the temperature is +5 ℃, when the actually measured screen temperature of the temperature sensing device is more than or equal to +5 ℃, the heating is disconnected, and when the actually measured screen temperature is less than +5 ℃, the heating is implemented.
The above description is only a part of the embodiments of the present invention, but the design concept of the present invention is not limited thereto, and any insubstantial modifications made by the design concept should fall within the scope of infringing the protection of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the protection scope of the technical solution of the present invention.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (1)
1. A heating design method of a liquid crystal display assembly in a low-temperature and low-pressure environment is aimed at the liquid crystal display assembly heated behind a screen, and is characterized in that an air pressure sensing device and a temperature sensing device are arranged in the liquid crystal display assembly at the same time, the air pressure sensing device is used for detecting the change of the ambient air pressure value and feeding the change back to a circuit heating control module to perform primary regulation and control on heating power consumption, and the temperature sensing device is used for monitoring the screen temperature in real time and feeding the change back to the circuit heating control module to perform secondary dynamic regulation and control on the heating power consumption; the circuit heating control module is used for controlling the heating power consumption in the first stage, and if the heating power consumption design value in the normal pressure environment is P, the following conditions are adopted:
1) detecting that the ambient air pressure is 69.65KPa +/-2 KPa, and the heating power consumption is regulated to 0.8P at first level;
2) detecting that the ambient air pressure is 57.33KPa +/-2 KPa, and the heating power consumption is regulated to 0.75P at first level;
3) detecting that the ambient air pressure is 30.1KPa +/-2 KPa, and the heating power consumption is regulated to 0.65P at first level;
4) detecting that the ambient air pressure is 11KPa +/-2 KPa, and controlling the heating power consumption to be 0.55P at first level;
5) detecting that the ambient air pressure is 4.11KPa +/-2 KPa, and the heating power consumption is regulated to 0.5P at first level; the circuit heating control module is used for secondary regulation and control of heating power consumption, the screen temperature of the liquid crystal display is at a certain designed temperature point T0 as a heating boundary point, when the actual screen temperature measured by the temperature sensing device is greater than or equal to T0, heating is disconnected, and when the actual screen temperature measured by the temperature sensing device is less than T0, heating is implemented; the T0 is adjusted within the temperature range of-10 ℃ to +10 ℃ according to different models of liquid crystal screens, different heating structures and different heat dissipation modes.
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| CN112693312B (en) * | 2021-01-11 | 2021-12-28 | 安徽天健环保车辆部件有限公司 | Intelligent temperature control structure of full liquid crystal combination instrument |
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| CN102938236A (en) * | 2012-10-22 | 2013-02-20 | 合肥京东方光电科技有限公司 | Liquid crystal display device |
| CN106125371A (en) * | 2016-08-31 | 2016-11-16 | 长沙湘计海盾科技有限公司 | A kind of liquid crystal display screen binding method adapting to hypobaric and structure thereof |
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