Disadvantages
- Limited viewing angle, causing color, saturation, contrast and brightness to vary, even within the intended viewing angle, by variations in posture.
- Uneven backlighting in some (mostly older) monitors, causing brightness distortion, especially toward the edges.
- Black levels may appear unacceptably bright due to the fact that individual liquid crystals cannot completely block all light from passing through.
- Display motion blur on moving objects caused by slow response times (>8 ms) and eye-tracking on a sample-and-hold display.
- As of 2012, most implementations of LCD backlighting use PWM to dim the display, which makes the screen flicker more acutely (this does not mean visibly) than a CRT monitor at 85 Hz refresh rate would (this is because the entire screen is strobing on and off rather than a CRT's phosphor sustained dot which continually scans across the display, leaving some part of the display always lit), causing severe eye-strain for some people. Unfortunately, many of these people don't know that their eye-strain is being caused by the invisible strobe effect of PWM. This problem is worse on many of the new LED backlit monitors, because the LEDs have a faster turn-on/turn-off time than a CCFL bulb.
- Only one native resolution. Displaying any other resolution either requires a video scaler, causing blurriness and jagged edges; or running the display at native resolution using 1:1 pixel mapping, causing the image either not to fill the screen (letterboxed display), or to run off the lower right edge of the screen.
- Fixed bit depth, many cheaper LCDs are only able to display 262,000 colors. 8-bit S-IPS panels can display 16 million colors and have significantly better black level, but are expensive and have slower response time.
- Input lag, because the LCD's A/D converter waits for each frame to be completely outputted before drawing it to the LCD panel.
- Dead or stuck pixels may occur during manufacturing or through use.
- In a constant-on situation, thermalization may occur, in which part of the screen has overheated and looks discolored compared to the rest of the screen.
- Unacceptably slow response times in low temperature environments.
- Loss of contrast in high temperature environments.
- Not usually designed to allow easy replacement of the backlight.
- Poor display in direct sunlight. Transflective LCDs provide a large improvement by reflecting natural light, but have not yet been widely adopted.
- Cannot be used with light guns/pens.
- Does not support interlaced video.
Read more about this topic: Liquid Crystal Display, Advantages and Disadvantages