01 Definition and Phenomenon of Rainbow Patterns

Rainbow pattern, also known as Color Mura, strictly speaking, there are two types of rainbow pattern phenomena that we currently see, namely "reflective rainbow pattern" and "transmissive rainbow pattern".

In TFT-LCD liquid crystal display modules, many optical films use PET as the substrate, such as diffusion films, enhancement films, TP ITO films, etc. When the light emitted by the LED passes through these optical films, refraction and reflection occur inside the optical films.

The rainbow patterns produced by using PET substrate and reflective polarizing film (i.e. APF brightening film) generally belong to the category of "reflective substrate color Mura", abbreviated as RSCM in English.

Rainbow pattern is a visual defect in TFT-LCD liquid crystal display modules caused by light interference after refraction and reflection of various optical materials. It appears as partial or overall rainbow like color stripes on a completely white screen; The colors of color stripes usually appear as alternating or mixed interference colors of red, green, and blue, resembling a rainbow.

The phenomenon of rainbow pattern defects usually has several key characteristics:

① Rainbow like morphology: The rainbow pattern phenomenon presents alternating interference colors such as red, green, and blue (similar to the colors of soap bubbles or oil films), usually without a fixed shape, and may be striped, patchy, or reticular.

② Visible from a specific perspective: Rainbow patterns can only be seen from a specific observation angle, and their phenomenon may completely disappear or worsen with changes in observation angle.

Gestant Display Technology Co.,LTD was founded in 2012 in Shenzhen China. Even, the founder of the company, has more than 15 years of rich experience in LCD display industry. He has been engaging in the basic research of LCD display technology in Japan since his graduate school and has been working in the flat panel display industry after graduation.

Proficient in the manufacturing process and technology development of LCD / OLED / polarizer, Even was also one of the members of China liquid crystal Association who has a senior industry background and supply chain resources. In the past three years, he assisted his shareholders in building factories, purchasing equipment，establishing production lines, and successfully obtaining ISO9001 and ISO14001 system certificates.

He has established good business relations with major panel manufacturers in China (BOE /Tianma / IVO /EDO / Visionox), and the glass supply is stable and sufficient.

Gestant Display's products are widely used in Smart wear，Smart home，Outdoor photography，IP phones, Medical care, Industrial control equipment, Automotive and Vehicle displays, Instrumentation, and other Information terminal applications which could offer long-term after-sale services(such as 2 years quality warranty, long-term supply) .