Pursuing ultimate high-definition

Since the birth of image recording technology, our pursuit of ultimate high-definition has never stopped. From black and white to color, from analog to digital, from standard definition to ultra-high definition, the iteration of display technology not only makes our "field of view" clearer, but also makes our experience more realistic. By visually comparing different display technologies in terms of clarity, color temperature, grayscale, etc., the significant improvement in screen display effect and quality due to technological development is demonstrated.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

The working principle of black and white television and television receiver is the same. It is the terminal equipment of the broadcasting and television system. Its main function is to amplify and demodulate the high-frequency signal emitted by the television station, and apply the amplified image signal to the cathode or cathode of the cathode ray tube, so that the image can be reproduced on the screen, amplify the accompanying sound signal, and drive the speaker to emit sound. In addition, under the action of synchronization signals, row and field scanning currents synchronized with the transmitting end are generated to supply the deflection coil of the cathode ray tube, allowing the screen to reproduce the image. LED is a PN junction with reverse voltage, which makes it difficult to inject minority carriers and therefore does not emit light. This type of diode made using the principle of injected electroluminescence is called a light-emitting diode, also known as LED. The LED display screen receives external signals through the control card, converts the signals into the brightness and color of the LED beads, and then controls the brightness and flicker frequency of the LED beads through the driving circuit, ultimately forming high-quality images.