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What is LCD backlight LCD liquid crystal backlight refers to a light source added behind the LCD screen to illuminate the screen so that it can display images and text. The LCD screen itself cannot generate light and must rely on the backlight to display images. The backlight usually consists of white LED lights mounted on the edge or back of the LCD screen.   Type of backlight There are two main types of LCD backlights: CCFL and LED. CCFL is Cold Cathode Fluorescent Lamp, which is a l...
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  In electronic equipment, LCD screen is a common display device. 4Opin LCD screen and 5Opin LCD screen are two common interface types, and they have some differences in connection mode, electrical signal transmission function and characteristics. This article will elaborate on these two LCD screens from 8 randomly selected aspects.   1. Interface type The most obvious difference between 40pin LCD screen and 50pin LCD screen is the interface type. The 40pin LCD screen uses a 40pin i...
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When it comes to LCD screens, everyone must be familiar with them, but when it comes to industrial LCD screens, you may not have touched them. With the continuous development of industry, traditional ordinary LCD screens cannot meet the requirements of the industrial industry, so industrial LCD screens have appeared. Display screen, today I will take you to understand the characteristics of industrial LCD screens. 1. The industrial LCD screen has high definition The industrial LCD screen h...
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If your LCD screen is not displaying, it may be bothering you. Take your time, this kind of problem can usually be fixed with a few simple repair steps. This article will describe some of the reasons why your LCD screen may not display, and provide some ways to solve these problems.   Check power connection You need to check if the power connection of the LCD LCD screen is correct. If the power connection is bad, the LCD screen will not work properly. You need to check that the power cor...
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With the popularity of electronic products, LCD screens have become one of the commonly used devices in our daily life and work. However, in the process of using the LCD screen for a long time, we will inevitably encounter some common faults. This article will introduce the common faults and solutions of LCD screens to help readers better maintain their own devices.   Fault 1: Incomplete LCD display   When the LCD screen does not display everything properly, it is most likely becau...
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Both industrial LCD screens and ordinary LCD screens are currently widely used LCD screens, but there is a big difference between the two. Industrial LCD screens are specially designed for industrial environments, which are more stable and reliable; while ordinary LCD screens are products for the general consumer market, and usually only need to meet basic visual needs. This article will introduce the differences between industrial LCD screens and ordinary LCD screens in detail.   1. Sens...
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  The capacitive touch screen is to paste a layer of transparent special metal conductive substance on the surface of the glass. When a finger touches this metal layer, the capacitance of the contact will change, causing the frequency of the oscillator connected to it to change. By measuring the frequency change, the touch position can be determined to obtain information. Since the capacitance changes with temperature, humidity or grounding conditions, its stability is poor and it tends to ...
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brightness The maximum brightness of the liquid crystal display is usually determined by the backlight. Technically, high brightness can be achieved, but this does not mean that the higher the brightness value, the better, because a display with too high brightness may cause eye injury to the viewer. LCD is a substance between solid state and liquid state. It cannot emit light by itself, so it needs additional light sources. Therefore, the number of lamps is related to the brightness of the liq...
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The observation information of the voltage test is the logic output value of the circuit under test. This method obtains the logical output value of the corresponding circuit by inputting different test vectors to the circuit, and then compares the collected logical output value of the circuit with the expected logical output value of the circuit corresponding to the input vector to achieve the purpose of detecting whether the circuit can achieve the expected logical function in the actual opera...
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