Difference between Active Matrix LCD and Passive Matrix LCD

1. Passive Matrix LCD :
It uses grid of vertical and horizontal conductors comprised of Indium Tin Oxide to create an image. Each pixel is controlled by an intersection of two conductors. It represents the off state of LCD i.e the pixel is OFF.

2. Active Matrix LCD :
It uses thin film transistors that are arranged in a matrix on a glass surface. To control the voltage tiny switching transistors and capacitors are used at each pixel location. The active pixel is called so because it has the ability to control the individual pixels and switch them quickly.



Difference between Active Matrix LCD and Passive Matrix LCD :

Sr.No.

Active Matrix LCD

Passive Matrix LCD

1. It uses grid of vertical and horizontal conductors comprised of Indium Tin Oxide to create an image. Each pixel is controlled by an intersection of two conductors. It uses thin film transistors that are arranged in a matrix on a glass surface. To control the voltage tiny switching transistors and capacitors are used at each pixel location.
2. Cost is usually higher. They are less costly.
3. It has higher response time. It has low response time.
4. It allows the viewer much more freedom to choose his/her angle. They are best viewed head on. When the user to either side to view screen from an oblique angle, it will cause color distortion, dimming and other problems.
5. Refresh rates are high. Refresh rates are low.
6. They display higher resolution. They display lower resolution as compared to active matrix LCD.
7.  They have the ability to create gray scale. It also offers 256 levels of brightness per pixel. They don’t reproduce colors accurately.
8. Active matrix LCDs are used in full-color LCD TVs monitors, cell phones etc. They are used in calculators display or a digital wrist watch where the display contains a limited number of segment and does not require full color.

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