How does LED display work?
Author:Wu Guofei Time:2021-06-10 13:30 Browse(953)
Working principle of graphic screen
Working principle of graphic screenThe display system consists of computer, communication, control circuit and display drive circuitDisplay sectionThe display screen is assembled by a number of display boards with uniform specifications and sizes.
this part is composed of a display moduleDue to the different color mixing distance of different size pixels.

How does LED display work?

different illuminanceThe environment requires different brightness, so the correct selection of the display part plays a decisive role in the display effect.
control section The data of each screen should be sent through a special communication card.
the communication card is responsible for communicating with the host computer.
the host computer will be sent by the communication cardThe instructions sent by the computer are sent to the display screen in the same order as the pre arranged display.
communication cardIt can be transmitted in serial mode.
the maximum transmission distance is up to 1200 meters, which can fully meet the needs of customers. its performance is directly related to the accuracy of data processingAccuracy and rapidity.
the performance requirements of kesian display screen and corresponding software for the host are not very high.
this system has a good performanceThe computer uses more than 586 models to control the information transmission of the whole display screen.
the computer sends information through a special computerThe communication cable is connected with the display screen.
the arranged information will be sent to the display screen for display.
in case of special circumstances, more information is neededThe basic structure of LED is an electroluminescent semiconductor material.
it is placed on a shelf with leads, and then sealed with epoxy resin,The core part of LED is a wafer composed of p-type semiconductor and n-type semiconductor.
there is a transition layer between p-type semiconductor and n-type semiconductor, It is called p-n junction.
in the PN junction of some semiconductor materials,
when the injected minority carriers are combined with the majority carriers, the excess energy will be released in the form of light, so that the electric energy can be directly converted into light energy.
it is difficult to inject the minority carriers in the PN junction with reverse voltage, So it doesn't emit light.
this kind of diode based on the principle of injection electroluminescence is called light-emitting diode.
it is generally called led.
when it is in the forward working state (that is, the positive voltage is applied at both ends).
when the current flows from the anode to the cathode of the LED, the semiconductor crystal emits light of different colors from ultraviolet to infrared, The intensity of light is related to the current.
energy saving lamp is a kind of special fluorescent lamp.
it is based on the phosphor on the lamp body excited by ultraviolet light.
at present, energy saving lamp mostly refers to the gas discharge lamp excited by electronic circuit.
LED is a kind of light-emitting diode, which can be ignited directly by rated voltage. From the perspective of development, it is a new type of energy-saving lamp..
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energy saving lamp
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