How are custom made lcd screens made?

Making them is complicated, involving many crucial steps to meet unique requirements. Here's the process:​

Glass substrate production for custom made lcd screens​

• Raw material preparation: High-purity mineral raw materials like silica sand are carefully chosen. To ensure high-purity glass, they undergo chemical purification, such as CVD. Silane gas decomposes at high temperatures, depositing silicon atoms onto a substrate to form an ultra-pure layer.​
• Molding: The purified material is melted at ~1500°C and formed into a uniform sheet via the float glass process. Molten glass floats on liquid tin for precise thickness control. Using gravity and surface tension, it spreads evenly to form a glass ribbon. The thickness of the LCD glass substrate is precisely controlled between 0.5 - 1.1 mm according to specific needs.​
• Cutting and grinding: The glass ribbon is cut into specified-size substrates using a laser or diamond tool. The edges are then ground and polished to remove cutting-induced cracks and defects, improving substrate smoothness and integrity.​

Photolithography and etching for custom made lcd screens​ 

• Photoresist Coating: A light-sensitive organic polymer, the photoresist, is uniformly applied onto the glass substrate using a spin coater. Precise control of rotational speed and coating time forms a 0.5–2 µm thick photoresist film for optimal patterning.​
• Photolithography Exposure: A photolithography system projects UV light (365nm or 193nm for LCD production) onto the photoresist, triggering a photochemical reaction. Tight regulation of exposure duration, light intensity, and mask alignment ensures accurate circuit pattern replication.​
• Development and etching: The exposed photoresist is developed, dissolving the unexposed part. The substrate then undergoes etching (dry or wet) to remove unprotected layers, forming the final circuit pattern.​

Liquid crystal injection for custom made lcd screens​

• Make a liquid crystal box: Edge sealing glue bonds two photolithographically and etched glass substrates together. Spacers (glass beads, for example) are evenly placed between them to control the box thickness between 2 - 5 microns.​
• Liquid crystal injection: Liquid crystal is injected into the box through a vacuum injection process. First, the box is evacuated, then the liquid crystal is injected from a specific port. Capillary action ensures even filling, and the port is sealed after injection.​

Polarizer lamination for custom made lcd screens​

• Prepare polarizer: An optical film that converts natural light into polarized light, the polarizer is selected according to design requirements. Polyvinyl alcohol (PVA) film polarizers, made by stretching and dyeing, have specific light - transmitting or absorbing properties.​
• Lamination process: The polarizer is precisely laminated onto both sides of the LC cell under controlled conditions. After lamination, visual inspection, optical testing, and UV/thermal curing verify adhesion quality.​

Connect the drive circuit for custom made lcd screens​

• Chip bonding: The drive chip is bonded to the glass substrate electrodes using flip chip or COG technology.​
• Printed Circuit Board (PCB) Connection: The LCD module with the driver chip is connected to the PCB via a flexible printed circuit board (FPC). FPC's flexibility and good electrical performance ensure reliable signal transmission. Electrical performance of the entire connection is tested.​

Module Assembly and Testing for custom made lcd screens​

• Module Assembly: The LCD module is assembled with the backlight, housing, and other components. All components must be firmly and correctly installed. Common backlight sources include CCFL, LED, EL, OEL, and FED backlights.​
• Performance test: The finished custom - made lcd screens are comprehensively tested for display brightness, color accuracy, touch response, and reliability under various conditions. Only high - quality products that pass these tests are sold.​

Sinda strictly controls each production process through this series of complex manufacturing steps and conducts strict product tests, ultimately producing high - quality custom made lcd screens, which increases customers' trust in Sinda's offerings.