Dual primary color LED display performance and main indicators

Dual primary color LED display performance and main indicators

The 256-level gray LED display control system is composed of: multimedia card, long-line driver, frame controller and display unit. The main function of the multimedia card is to be able to digitize the display content of the computer (it also completes the vga graphics card function), and at the same time, it can also sample the externally input video signal and convert it into a digital signal output for the display. The long-line driver card converts the digital signal output from the multimedia card into an RS422 interface signal for long-distance transmission. In the case that the main control computer is far away from the display screen (within 350m), using this differential transmission method can obtain reliable results. The transmission medium is five kinds of twisted pairs.

The frame controller is the core unit of the display screen, and the main functions completed include: data reception, data processing, data storage, data distribution, grayscale realization, visual correction and adjustment. Because of the complicated functions and the large number of control contents, large-scale programmable devices are used. The circuit is highly integrated. The frame controller distributes and outputs the grayscale data signal sent to the display screen section. The signals are transmitted in parallel, so the transmission frequency Faster.

The most remarkable feature of this control system is that the control logic is highly centralized and highly integrated. The front-end display module part of the display screen mainly includes only the driving circuit. Even the color matching function is unified by the main controller, so the display module circuit is extremely simple, greatly improving the reliability and maintainability of the screen body.

The performance index of this system reaches:

1. Grayscale isopolar: true 256 levels per color.
2. Mode: Full tracking in display mode, supporting 1024x768 high-resolution mode.
3. Refresh rate: The frame refresh rate is greater than 200hz, the picture is extremely stable, without flicker.
4. Main frequency: The main frequency is up to 64mhz, leaving a lot of room for future improvement.
5. Working mode: fully latched working mode, even when using a video recorder to transcribe, it is also clear.

Indoor dual-color LED display technical indicators

Specification Ф5 Ф3.75
Module parameter single point diameter 5mm 3.75mm
Dot pitch 7.5mm 4.75mm
Number of points 8 columns × 8 rows 8 columns × 8 rows Unit board index module number 10 × 4 = 30 blocks 10 × 4 = 32 points 80 × 32 = 2048 points 80 × 32 = 2048 points 612 mm long
245mm wide and 382mm long
153mm wide
Pixel density 17200 dots / m 2 44100 dots / m 2
Maximum power consumption 700w / m 2 800w / m 2
Weight 25kg / m 2 20kg / m 2
Color 256 levels of gray for each pixel, a total of 65536 colors, support mode vga640 × 480, 800 × 600, 1024 × 768 synchronous display with the computer, point-to-point visual correction Red and green independent nonlinear correction s
The display mode is synchronized with the computer, corresponding to the working voltage 220v ± 10% point by point
The transmission mode is all digital, and the serial-parallel matrix transmission communication distance is not less than 200m

Outdoor dual-color LED display technical indicators

Specifications Ф15 Ф19 Ф26 Ф30
Pixel parameter LED composition 1 red + 4 green 3 red + 6 green 4 red + 8 green 4 red + 10 green dot spacing 15.75mm 22mm 26mm 31.25mm
Module combination Single LED Single LED Single LED Single LED
Cabinet index pixel number 32 × 16 = 512 32 × 16 = 512 32 × 16 = 512 32 × 16 = 512
Length 503.9mm
251.9mm wide and 704mm long
352mm wide and 832mm long
246mm wide and 1000mm long
500mm wide
Pixel density 4096 dots / m 2 2066 dots / m 2 1600 dots / m 2 1024 dots / m 2
Maximum power consumption 1100w / m 2 1200w / m 2 1000w / m 2 1000w / m 2
Weight 55kg / m 2 60kg / m 2 60kg / m 2 60kg / m 2
Drive mode: Static latched colors: 256 levels of gray for each pixel, a total of 65536 colors, support mode: VGA 640 × 480, 800 × 600, 1024 × 768, simultaneous display with computer, dot-by-dot visual correction, red and green independent non-linear correction frame refresh Rate 120 frames / S
The display mode is synchronized with the computer, corresponding to the working voltage 220V ± 10% point by point
The transmission mode is all digital, and the serial-parallel matrix transmission communication distance is not less than 200m

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