By Susu | 16 March 2020 | 0 Comments
How can the embedded industrial touch display be used in a wide temperature environment?
How can the embedded industrial touch display be used in a wide temperature environment?
Embedded industrial touch displays have extremely high performance requirements due to their application in harsh industrial environments such as high and low temperature, dust, water, and oil stains. Especially in the high and low temperature use environment, it is a great challenge to the embedded industrial touch display products. Then, the high and wide temperature performance of the embedded industrial touch display is very necessary.
So how does the embedded industrial touch display achieve wide temperature use? Next, let's explore with Xiaobian:
I. Wide temperature mode and working principle
1) Method 1: Use low temperature heating method
There are two methods of low-temperature heating: point-by-point heating and whole-surface heating. The overall power consumption of such a display will increase 4-6 times. For example, the power consumption of a 15-inch LCD at normal temperature (22 ° C) is 20w, and the power consumption in a low temperature environment (-40 ° C) is: 90-120w. This heating method makes the machine during long-term use, In some cases, the liquid crystal may leak out or be difficult to reduce.
2) Method 2: Increase the brightness of the LCD screen
By developing a special high-voltage bar (which can generate 2000v-3000v start-up voltage) to illuminate the backlight tube in a low temperature environment (-40 ° C), the liquid crystal warms up due to the huge heat generated by the backlight tube. It solves the problem of low-temperature operation of the liquid crystal, and also solves the problem of visibility under sunlight. This method is referred to as the brightness enhancement method.
Disadvantages of method one and two:
① Both of these methods add many accessories and reduce reliability.
② Assembly is relatively troublesome to produce, and it is easy to cause defective products, and the defective product ratio is high.
③ The ability of the device to resist shock and vibration is reduced.
④ In the aging test, it is found that the aging speed is extremely fast and the acceleration increases under the environment of 50 ° C, especially the brightening method, and the life is only 1/10 of normal.
3) Method 3: The new liquid crystal high and low temperature application technology, the product can work normally at low temperature without heating or brightening.
The basic principle is as follows: the liquid crystal does not freeze or change state at low temperature (-40 ° C), otherwise it will not work whether it is heating or brightening, so we think of correcting the drift of its electrical characteristics by software . Try to trigger the operation of the LCD at low temperatures. This requires adjusting the driving timing of the liquid crystal and so on. Through a large number of experimental studies and extensive applications, this technology has been very mature. No matter how the ambient temperature changes, the normal operation of the liquid crystal can be guaranteed by widening the trigger timing and matching the corresponding driver.
(Article source network: Dawei Century)
TingShu
Whatapp/wechat:+86 18102627416
So how does the embedded industrial touch display achieve wide temperature use? Next, let's explore with Xiaobian:
I. Wide temperature mode and working principle
1) Method 1: Use low temperature heating method
There are two methods of low-temperature heating: point-by-point heating and whole-surface heating. The overall power consumption of such a display will increase 4-6 times. For example, the power consumption of a 15-inch LCD at normal temperature (22 ° C) is 20w, and the power consumption in a low temperature environment (-40 ° C) is: 90-120w. This heating method makes the machine during long-term use, In some cases, the liquid crystal may leak out or be difficult to reduce.
2) Method 2: Increase the brightness of the LCD screen
By developing a special high-voltage bar (which can generate 2000v-3000v start-up voltage) to illuminate the backlight tube in a low temperature environment (-40 ° C), the liquid crystal warms up due to the huge heat generated by the backlight tube. It solves the problem of low-temperature operation of the liquid crystal, and also solves the problem of visibility under sunlight. This method is referred to as the brightness enhancement method.
Disadvantages of method one and two:
① Both of these methods add many accessories and reduce reliability.
② Assembly is relatively troublesome to produce, and it is easy to cause defective products, and the defective product ratio is high.
③ The ability of the device to resist shock and vibration is reduced.
④ In the aging test, it is found that the aging speed is extremely fast and the acceleration increases under the environment of 50 ° C, especially the brightening method, and the life is only 1/10 of normal.
3) Method 3: The new liquid crystal high and low temperature application technology, the product can work normally at low temperature without heating or brightening.
The basic principle is as follows: the liquid crystal does not freeze or change state at low temperature (-40 ° C), otherwise it will not work whether it is heating or brightening, so we think of correcting the drift of its electrical characteristics by software . Try to trigger the operation of the LCD at low temperatures. This requires adjusting the driving timing of the liquid crystal and so on. Through a large number of experimental studies and extensive applications, this technology has been very mature. No matter how the ambient temperature changes, the normal operation of the liquid crystal can be guaranteed by widening the trigger timing and matching the corresponding driver.
(Article source network: Dawei Century)
TingShu
Whatapp/wechat:+86 18102627416
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