High brightness LCD screens are mainly used for outdoor environments and semi outdoor display windows. Due to sunlight shining on the LCD screen, it is necessary to choose a high brightness LCD screen with a brightness of 1500nits or higher. Outdoor LCD screen.
1、 Structural requirements for outdoor environments - Outdoor LCD screens.
Design principle: According to the GB4208-93 standard for enclosure protection level, the integrated chassis and temperature control system used in this project will achieve a protection level of IP55 or above for all outdoor equipment. The design will follow the following principles:
1)Anti theft requirements: The door lock has a three-level protection, with hidden screws and no exposed detachable screws.
2) Box anti-corrosion requirements: The outer shell is designed with high-strength galvanized sheet and treated with outdoor powder coating. The average thickness of the board is 1.5mm, which is beautiful and sturdy; The surface treatment of the steel plate meets the requirements of GB/T9286 testing technology.
3) The overall equipment design strength is designed to withstand strong winds of level 12.
4) Explosion proof glass: AR or AG tempered glass is used, which is explosion-proof and anti reflective (with a requirement of light transmittance greater than 95%).
5) Waterproof design: The cabinet has good sealing performance, and the door opening sealing strip uses a three composite rubber strip with good elasticity, resistance to compression deformation, aging, ozone, chemical effects, and a wide temperature range (-40 ℃~+120 ℃), with a service life of at least 10 years.
6) The whole machine fully complies with IPX5 requirements, and multi angle water spraying does not allow water to enter; The testing conditions are as follows:
1. Inner diameter of nozzle: 6.3mm;
2. Water flow rate: 12.5 ± 0.625L/min;
3. Water pressure: Adjust the water flow rate according to regulations
4. The central part of the main water flow: a circle with a diameter of about 40mm at a distance of 2.5m from the nozzle;
5. Spray time per square meter on the surface of the shell: about 1 minute;
6. Test time: at least 3 minutes;
7. The distance from the nozzle to the surface of the casing is 2.5-3m.
8. The whole machine requires all-round water spraying.
2、 Temperature control requirements for outdoor use of high brightness LCD screens
The current mainstream heat dissipation methods include integrated air conditioning temperature control, strong exhaust temperature control, and air to air heat exchange temperature control. It can work normally under direct sunlight in outdoor environments ranging from minus 40 degrees to 55 degrees, and the temperature inside the cabinet can be controlled within 25 degrees plus or minus 10 degrees.
The heat generated by high brightness LCD screens in sunlight mainly comes from the heat generated by the operation of the high brightness LCD screen itself, the auxiliary radiation of sunlight on the LCD screen, and the heat generated by electronic components. Therefore, in actual heat dissipation design, we need to use reasonable air duct design to take away all three parts of the heat.
Hand in hand teaching you how to use a high brightness LCD screen
3、 The use of high brightness LCD screen
A high brightness LCD screen mainly consists of a LCD panel and a backlight source.
The main manufacturers of high brightness LCD screens and LCD panels include LG, Samsung, Sharp, Innolux, AU Optronics, Huaxing Optronics, BOE Optronics, Panda, and others. The LCD panel is equipped with a standard LVDS interface or a standard V-BY-ONE interface. It can be equipped with a TV motherboard, Android motherboard, or X86 motherboard to drive the LCD panel.
The backlight source of the high brightness LCD screen adopts a direct type LED backlight, with a brightness of 1500nits, 2000nits, 2500nits, 3000nits, and 5000nits. It comes standard with a constant current source driver and reserved with a standard power supply interface. automatic photosensitive system, precise dimming. Efficient and energy-saving.
