Industrial LCD screen selection considerations

For R&D personnel and procurement personnel, how to choose a suitable industrial LCD product is of utmost importance. The selection of industrial LCD screens includes key indicators such as the type, brand and price, supply, resolution and size, temperature and brightness, and interface mode of the liquid crystal display.

With the development of science and technology, people are demanding higher and higher levels of liquid crystal display for various types of control equipment, on-board equipment, power equipment, textile machinery and other equipment products. The common liquid crystal can be divided into three types: segment type, character type, and graphic lattice. Hangzhou Lihuang Technology Agents Chimei, Tianma, Mitsubishi, AUO, Innolux and other brands of LCD screen products of various sizes.

TFT LCD screens cover a wide range of sizes and are basically true color display modules. Generally, small-size LCD screens have built-in controllers to directly provide MPU interfaces. Large and medium-sized LCD screens require an additional controller in order to control their display. Since the resolution of industrial LCDs is physically fixed, full-screen displays can generally only be displayed at their inherent resolution, unlike CRTs.

LCD operating temperature range generally refers to room temperature (0 °C ~ 50 °C) or wide temperature (-20 °C ~ 70 °C range), industrial LCD screen to meet the special environmental applications, the operating temperature can reach -30 °C -80 °C.

LCD unit of brightness is cd/m2 or Nit (Nite), in the face of different application environments, such as outdoor, shipboard and some special places, the LCD screen brightness has higher requirements, Hangzhou Lihuang Technology Provide high-brightness LCD products, outdoor sunlight can be read, the product brightness can reach 230cd/m2 --- 1500cd/m2. The

LCD backlight selection. On the other hand, liquid crystals can be further classified into transmissive, reflective, and transflective. Because liquid crystals are passive light-emitting displays, they must be displayed by external light sources. Transmissive liquid crystals must be provided with background light and reflect light. Liquid crystals require strong ambient light, and transflective liquid crystals require strong ambient light or backlighting. There are usually three kinds of background light of the liquid crystal: LED, EL and CCFL (Cold Cathode Luminescence).

Cold cathode fluorescent lamp CCFL is a low-pressure mercury and rare gas discharge lamp that uses a cold cathode instead of a hot cathode such as a tungsten wire. Under the action of a strong electric field, ion bombardment is used to emit electrons from electrodes composed of metals such as nickel, hafnium and zirconium. The mercury atoms excite and ionize to form a rich 253.7-nm ultraviolet light and sufficient current, and the UV radiation excites the phosphor coating on the tube wall and emits light. Due to the different constituent materials of the fluorescent material, different colors of light can be emitted. It has the advantages of high brightness, high efficiency, low power consumption, long life, and effective light emission for a long time. The shockproof performance is good, and the lights can be repeatedly turned off and can be started at a low temperature. Compared with a hot-cathode fluorescent lamp, the calorific value is low and the diameter of the tube is small, which can be conveniently used as a light source for illumination of various liquid crystal displays