The price of indoor LED displays is approximately several thousand RMB per square meter. The price varies depending on the model, and whether you need a high or low refresh rate. The pixel pitch is generally small, typically Φ3mm to Φ8mm, and the display area is usually a few to tens of square meters.
1. By color base, it can be divided into: Single-color large screen: single color (red or green). Dual-color large screen: red and green dual-color, 256 gray levels, can display 65536 colors. Full-color large screen: red, green, and blue three primary colors, a full-color large screen with 256 gray levels can display more than 16 million colors.
2. By display device classification: LED digital large screen: The large screen device is a 7-segment digital tube, suitable for making clock screens, interest rate screens, etc., displaying digital electronic large screens. LED dot matrix graphic large screen: The display device is a dot matrix display module composed of many uniformly arranged light-emitting diodes, suitable for playing text and image information. LED video large screen: The display device is composed of many light-emitting diodes and can display various video files such as videos and animations.
3. By light-emitting point diameter and spacing: Indoor large screen (by diameter): Φ3mm, Φ3.75mm, Φ5mm, Outdoor large screen (by spacing): PH10, PH12, PH14, PH16, PH20, PH25, PH31.25, PH37.5... 5. Display modes include static, horizontal scrolling, vertical scrolling, and page turning display. A single module controls and drives 12 (many can control 24) 8x8 dot matrixes, a total of 16x48 dot matrixes (or 32x48 dot matrixes), which is 12 times (or 24 times) that of a single MAX7219 (or PS7219, HD7279, ZLG7289 and other similar LED display driver modules)! It can be cascaded to form any size dot matrix large screen. It has good display effect, low power consumption, and is cheaper than using MAX7219 circuits.
