China 3.99 inch bar Sunlight-readable display Manufacturers, Suppliers, Factory

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.

Completely eliminating LCD light leakage is difficult (especially against a pure black background, where slight light leakage may occur at the edges). However, through optimized design (such as high-precision shading structures and zoned light control), the use of high-quality materials (such as low-defect light guide plates and high-light-shielding adhesive strips), and rigorous production processes (such as full lamination and precision assembly), light leakage can be significantly reduced. Shenzhen Hongjia Technology has 12 years of industry experience, specializing in the research and development, production and sales of 1.14-inch to 12.1-inch LCD screens and matching touch screens. It has rich experience in dealing with backlight leakage and can meet the demanding requirements of our customers. We can also accept customization. Customers are welcome to email us for consultation.

In the field of small-size TFT screen driver ICs, ST7796 and ILI9488 ICs are often used by customers. Many customers also have questions when choosing ICs. Which IC is more cost-effective and has better performance? Today I will briefly express my views here. If users are making devices that require high refresh rates, such as gaming devices or video playback, ST7796U may be more suitable. ILI9488 may have more advantages in cost or be more flexible in some interfaces.

LCD and backlight cables require soldering for proper display. Traditionally, factory workers solder these cables manually. Manual soldering is slow and highly dependent on the worker's soldering proficiency. Unskilled workers can sometimes cause cold soldering, leading to sporadic soldering defects when shipped to customers, causing the display to malfunction.

HJ1800-01, a 1.8-inch round LCD with IPS, full viewing angle, 360*360 resolution, and a contrast ratio of 1200. It supports multiple interfaces (SPI/MCU/QSPI/MIPI) via the IM port, and supports an ultra-wide operating temperature range of -30°C to 80°C. The driver IC is the ST77916, and standard ICs are available for a long time. This 1.8-inch round LCD features a capacitive touchscreen and I2C interface. The touchscreen is laminated to the LCD for easy debugging.

If customers encounter screen display problems and want to check whether they are caused by flexible cables, they can check from the following aspects, including appearance, material, process, and functional testing to distinguish: It should be noted that the display screen may not display normally sometimes not because of the flexible cable itself, but because of interface oxidation or motherboard problems, but the flexible cable is the easiest to check as a connecting component. Therefore, when distinguishing problems, multiple factors should be considered comprehensively, and you cannot just look at one point.