Working principles and comparison of advantages and disadvantages of LCD and OLED part four

2.4. OLED can be made thinner and easier to fold

OLED screens have no backlight layer and liquid crystal layer, so they are very easy to make thin and can be bent to a large extent like paper. Being able to bend means that a curved screen can be easily realized, which can significantly improve the quality of the phone itself.

In addition to the backlight layer and liquid crystal layer, the LCD screen also has some polarizers in the middle, so it is much thicker than OLED. The backlight layer and liquid crystal layer are hard substrates and can only be bent to a very small extent, which can only be seen on large panels such as desktop monitors.

2.5. OLED has a shorter lifespan

The backlight layer of LCD is used to emit light. The liquid crystal layer is only responsible for deflecting and controlling the amount of light. The filter layer is only responsible for changing the color of the light and does not participate in emitting light. The voltage is applied to the liquid crystal layer that does not participate in emitting light.

The OLED screen voltage is directly applied to the self-luminous diode, causing electrons to frequently migrate in the OLED's light-emitting layer. In addition, the luminescent layer itself is an organic substance, and organic substances are much easier to age than inorganic substances. Therefore, organic substances + frequent electron migration + self-luminescence directly lead to the screen life of OLED being significantly shorter than that of LCD screens.

2.6. LCD has the disadvantage of light leakage

Since the LCD screen has a backlight layer, and the screen panel will eventually be installed on a mobile phone or monitor, the backlight of the backlight layer can easily leak out at the junction of the screen frame. When a pure black screen is displayed, the border will appear. A large-area halo phenomenon is called light leakage.