BOE Jingxin Technology Delivers Its P0.9 COG Mini LED Product

On September 27, BOE Jingxin Technology announced on its official WeChat page that its first major chip-on-glass (COG) P0.9 MLED product was delivered.

As BOE’s wholly owned subsidiary, BOE Jingxin Technology—founded on November 4, 2020 with a registered capital of 950 million yuan—specializes in the design and production of Mini/Micro LED displays as well as related solutions.

As BOE Jingxin Technology described, the self-developed P0.9 COG AM Mini LED is fabricated by mounting tailored chips to a glass substrate. Compared with the conventional PCB-based approach in the LED industry, COG features more accurate process, deeper black levels, and ultra-high contrast along with excellent flatness and heat dissipation properties.

Image source: PAIXIN.COM

The COG-based Mini LED adopts an AM technology compatible to mass production and reproduces images through point-to-point direct drive. When displaying images with 1,000 nits of brightness, the Mini LED product can keep the instantaneous brightness at 1,000 nits. Therefore, the product can genuinely present flicker-free still images and avoid the presence of “water ripples.” Water ripples on screen is a common problem of PM LED products caused by excessively high instantaneous brightness, which may lead to headaches, dizziness and visual fatigue.

Additionally, the COG AM approach can facilitate perfect fitting of full-grayscale gamma curves, hence the smooth image transitions of the display particularly in a low-grayscale scenario. When the display presents an extremely dark scene, viewers can still perceive subtle changes in brightness without any flickers. Conversely, due to its driving limits, PM-based displays tend to exhibit noticeable transitions between images—which are relatively abrupt to viewers—in the context of low grayscales.

COG products boast a 1-million-to-1 contrast ratio, extremely high gamut of 115% NTSC and excellent HDR effect, hence the reproduction of images with high definition and saturation. Compared with COB products, COG-based displays use 20% less energy under constant brightness and transmittance. (Source: BOE Jingxin Technology)

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