China 3.5 inch Sunlight-readable display 320*480 30PIN Manufacturers, Suppliers, Factory

4.0inch display supports SPI/MCU interface, supports horizontal screen display、8/16BIT MCU+SPI

A 4.0 inch Round LCD module is an electronic display component that provides a clear and high-resolution visual output. Here are a few reasons why you might need this module:

With the increasing popularity of the Internet, all kinds of communication devices are becoming more and more popular among consumers, which leads to a sharp increase in the demand for data transmission. In addition, digital TV, high-definition TV, and color images all require higher bandwidth. Therefore, system design engineers must rely on analog technology to design circuit systems and support data transmission. Low-voltage differential signaling (LVDS for short) is one such analog technology that engineers can use to design mixed-signal systems. LVDS uses high-speed analog circuit technology to ensure that copper wires can support data transmission above gigabits.

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First, it should be clear that the main type of radiation produced by LCD monitors is low-frequency electromagnetic radiation, and its radiation level is far below international safety standards. Compared with the old cathode ray tube (CRT) monitors, LCDs have much less radiation. Therefore, the impact of LCD devices on the human body is very limited. However, there are ways to reduce the impact of this radiation. In this article, we will explore some effective ways to reduce LCD screen radiation.

The LCD screen itself does not emit light, and a backlight needs to be added to the back of the glass for normal display. This involves how to test the surface brightness and backlight uniformity of the LCD screen. The brightness of the LCD screen surface and backlight brightness are measured through BM -7 equipment test, the test is more accurate when the display is powered normally and displays a solid color picture.