OLED and LCD display! What’s the difference between different crafts for iPhone display?

Crafts and structural differences of assemble bonding process

  • Incell bonding technology Structure: cover plate + oca + polarizer + liquid crystal + negative film (lower polarizer) + backlight (integrated touch display)
  • Ogs bonding technology structure: cover+oca+polarizer+LCD+negative (lower polarizer)+backlight (integrated touch cover)
  • oncell bonding technology Structure: cover+OCA+touch+OCA+polarizer+LCD+negative film+backlight

Analysis: oncell is the earliest technology used. Apple’s 4th generation 4s uses the oncell process. Its disadvantage is that the laminated screen is thicker, including glue and touch, and the displayed effect is not so clear.

The Ogs process is relatively similar to the effect of incell lamination, but if the outer screen is damaged or defective, it needs to be replaced together with the touch screen, which is relatively expensive, including the original processing of the ots touch cover will also cause some defective rates, so now The main process is to use the incell process.

The trend change of liquid crystal and the current mainstream liquid crystal category

  • LCD screen Features: need backlight to shine, long service life (15000h)
  • Oled LCD screen Features: self-illumination, wide viewing angle, high resolution, uniform image quality and energy saving (lifetime 5000h)
  • Amoled LCD screen Features: Improve on OLED technology, use flexible material as substrate, not easy to damage.

Analysis: The thickness of the LCD laminated screen is not as good as that of the OLED screen in terms of color, screen response speed, or energy saving. When the OLED screen is black, the screen is equivalent to a state of not working, and it is pure black. The LCD is due to the backlight. The luminescent display will have a gray light feeling even in a pure black screen. However, one disadvantage of the OLED screen is that the lifespan of the blue and red sub-pixels is too short, and it is prone to aging and burn-in phenomenon. This phenomenon has been improved on the AMOLED screen. It is said that the area of the blue and red sub-pixels has been doubled.