Image Acquisition Of LED Significant Screen
LED significant screen to the image display using the electronic light-emitting system shows the results of the image type conversion of digital signals. Special video card JMC-LED was born, in the PCI bus using 64-bit graphics gas pedal based on the formation of a unified compatible with VGA, video functions, making video data superimposed on VGA data to improve the shortcomings when compatible. The use of a full-screen way to collect resolution, so that the video image can achieve a full-angle resolution to strengthen the resolution effect, eliminate the problem of blurred edges, can be scaled at any time, and arbitrarily move the image, for different playback requirements can be a timely response. Effective separation of red, green, and blue, to enhance the LED significant screen playback of true-color imaging effect.
Real Image Color Reproduction Of LED Significant Screen
In general, the red, green, and the blue color combination should meet the light sensitivity intensity ratio tends to 3:6:1; red imaging sensitivity is stronger, so must be uniformly scattered in the spatial display of red; because the three colors' light intensity is different, people's visual perception presented in the resolution of the non-linear curve is also different, so to benefit from different light intensity white light, correct the TV internal shooting light; color discrimination ability due to personal differences, environmental differences exist in different, need to be reproduced according to certain objective indicators of color, such as:
(1) Positioning 660 nm red light, 525 nm green light, and 470 nm blue light as the fundamental wavelengths.
(2) Matching with 4 or more tubes of white light units according to the actual condition of light intensity.
(3) The gray level is 256 levels.
(4) LED pixels of the LED significant screen must be processed with non-linear calibration. The control of the three-color matching tubes can be carried out by the hardware system and the playback system software in conjunction with each other.
Brightness Control D/T Conversion Of LED Significant Screen
The controller of the LED significant screen is used to control the luminescence of the pixels, which leads to driving independence. When color video needs to be presented, it is necessary to effectively control the brightness and color of each pixel point, and make the scanning operation completed simultaneously within a specified time. However, large LED significant screens to have thousands of pixels, which increases the complexity of control and the difficulty of data transmission. And the use of D/A control of each pixel point is unrealistic in practice when a new control scheme is needed to meet the complex requirements of the pixel system. Based on the visual principle analysis, the brightness/extinction ratio of the pixel is the main basis for people to analyze the average brightness, and effective adjustment of this ratio can achieve effective control of pixel brightness. An LED significant screen in the application of this principle, the digital signal to time signal conversion, to achieve effective conversion between D / A.
Data Reconfiguration And Storage Of LED Significant Screen
At present, the combined pixel method and bit-plane pixel method are common memory combination methods. Among them, the bit-plane method has more obvious advantages and effectively enhances the best display effect of LED significant screens. After bit-plane data reconfiguration of the circuit to convert the data of RGB, the organic combination of different pixels in the same power bit, and the use of adjacent storage structure for data storage.
ISP in Logic Circuit Design Of LED Significant Screen
With the advent of system programmable technology (ISP) of LED significant screens, users can repeatedly fix the shortcomings in the design and design their own targets, systems, or boards, realizing the designer application function of software integration. The introduction of the new technology effectively shortens the design time, expands the limited use of components, simplifies field maintenance, and facilitates the realization of target device functions. The impact of the selected device can be ignored during the input logic of the system software, and the input components can be selected at will or virtual components can be selected for adaptation after the input is completed.
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