What is an active display and why is it more expensive?

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designs
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What is an active display and why is it more expensive?

Post by designs » Wed Jun 19, 2019 4:21 pm

Why is an active display more expensive than a passive display?

focus
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Re: What is an active display and why is it more expensive?

Post by focus » Sun Jul 21, 2019 1:37 am

There are two classes of displays. Active and passive.

Most of this time, this is dealing with a TFT https://focuslcds.com/product-category/tft-display/ display.

An active display is one where there is one transistor to drive each pixel. This produces a sharper looking display and a faster refresh rate. The pixel is either on 100% or off 100%. The down side is a higher cost.

A passive display is one where there is one transistor for several pixels. The pixels are refreshed at a set rate (also called a duty cycle). The higher the duty cycle, the sharper the image.

Passive displays are less cost.

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