Analysis Of The Causes Of Bright Spots On LCD Screens

Fixed bright spots (bad spots):
Highlight (white spot): In this case, pixels often become bright white, usually due to a pixel in the liquid crystal layer being unable to turn off, causing it to remain in a bright state. This may be due to manufacturing defects in the LCD screen itself or physical damage during use.
Dark spot (black dot): In this case, pixels usually appear black because they cannot be turned on, causing them to remain in a closed state.
Pressure damage:
When external objects apply pressure to the LCD screen, such as touching the screen with fingers or hard objects, it may cause pixel damage. In this case, bright or dark spots may appear on the screen, and the distribution of these points is usually related to the location where pressure is applied.
Circuit issues:
The circuit issues behind the LCD screen, such as a malfunction in the driving circuit that controls pixel switches, may cause certain pixels to fail to respond correctly to control signals, resulting in fixed bright or dark spots.
Service life and aging:
After long-term use, certain components in the LCD screen may age or be damaged, especially in the backlight or driver circuit. This may result in bright or dark spots appearing on the screen.
Defects in the production process:
Possible production defects in the manufacturing process of LCD screens, such as incorrect assembly of certain pixels or problems during LCD filling, may result in bright or dark spots in the pixels.