Wide-temperature control device for LCD (liquid crystal display)
A technology of liquid crystal display and control device, which is applied in temperature control, non-electric variable control, control/regulation system, etc., can solve the problem that the display cannot work normally, and achieve economical and practical electrodes, strong weldability, and high sensitivity. Effect
Inactive Publication Date: 2010-06-30
北京航峰科伟装备技术股份有限公司
View PDF0 Cites 8 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
At present, the working temperature of most of the liquid crystal display products on the market is between 0 and 50°C. When the ambient temperature is lower than 0°C, the liquid crystal display cannot work normally at all, which brings great inconvenience to the on-site work.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0038] Specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0039] as attached figure 2 Shown: the present invention comprises PLC master controller, PLC analog quantity acquisition unit, liquid crystal display, temperature acquisition sensor PT100, heating membrane circuit and the power supply circuit of heating membrane.
[0040] joint attached figure 2 , the temperature control implementation process of the liquid crystal display temperature control circuit is: first, the temperature sensor PT100 transmits the temperature information of the liquid crystal display to the PLC controller through the PLC extended analog acquisition unit, and after the PLC obtains the temperature signal collected by the temperature sensor, it communicates with the user Comparing the temperature value set by the liquid crystal display, when the collected temperature value is lower than the temperature value set by the user, th...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention mainly relates to a wide-temperature control device for LCDs (liquid crystal display), which belongs to a control circuit based on a temperature sampling and controlling theory. Traditional electrical heating control systems generally adopt relay control techniques, and hardware with fixed wiring is used for logic control, so a control system has the disadvantages of large volume, high power consumption, low efficiency and high failure rate, which can not guarantee normal industrial production. Along with the development of computer control technology, the traditional relay control technique is inevitably substituted by PLC control technique based on computer technology. Because of the excellent performance of the PLC, a temperature control system based on PLC control is economy, efficient, stable and easy to maintain. In order to keep an LCD normally working at the temperature lower than the normal working temperature of the LCD, a special LCD working at low temperature is required or a heating apparatus needs to be added on a common LCD. The present invention is designed to add a temperature control device on a common LCD so that the LCD can normally work at temperature lower than the normal working temperature of the LCD. A heating circuit is adopted for heating the LCD to keep the LCD normally working, thus guaranteeing that the LCD can work at a wider temperature range. The wide-temperature control device for LCDs realizes functions by means of temperature sampling, processing and control modules, is mainly used for LCD working at low temperature, other products such as instruments and meters for military use or outdoor use, and the like requiring transparent heating, defrosting and defogging, and meanwhile has favorable visible light transmittance.
Description
technical field [0001] The design invention belongs to a control circuit, and mainly relates to a wide temperature control device for an LCD liquid crystal display. To ensure that the LCD liquid crystal display can work in a wider temperature range. Background technique [0002] The traditional heating electrical control system generally adopts relay control technology. Due to the use of fixed wiring hardware to realize logic control, the volume of the control system is increased, the power consumption is high, the efficiency is not high, and it is prone to failure, which cannot guarantee normal industrial production. With the development of computer control technology, the traditional relay control technology must be replaced by PLC control technology based on computer technology. The excellent performance of PLC itself makes the temperature control system based on PLC control economical, efficient, stable and easy to maintain. This temperature control system has general ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/20
Inventor 邓可张金伟孙君起
Owner 北京航峰科伟装备技术股份有限公司