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Image display device having a drive transistor with a channel length longer than a channel length of individual switching transistors

  • US 10,229,638 B2
  • Filed: 11/21/2017
  • Issued: 03/12/2019
  • Est. Priority Date: 08/18/2006
  • Status: Active Grant
First Claim
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1. An image display device comprising:

  • a first scanning line extending along a row direction;

    a second scanning line extending along the row direction;

    a third scanning line extending along the row direction;

    a signal line extending along a column direction and configured to supply a video signal;

    a first voltage line;

    a second voltage line; and

    a pixel circuit connected to the first scanning line, the second scanning line, the third scanning line, the signal line, the first voltage line, and the second voltage line, whereinthe pixel circuit includes a sampling transistor, a drive transistor, a pixel capacitor including a first electrode and a second electrode, a light emitting device, a first switching transistor connected between the first voltage line and the light emitting device, and a second switching transistor connected between the second voltage line and the drive transistor,the first scanning line is connected to a control terminal of the first switching transistor,the second scanning line is connected to a control terminal of the second switching transistor,the third scanning line is connected to a control terminal of the sampling transistor,the sampling transistor is connected to the pixel capacitor,the pixel capacitor is connected between an anode electrode of the light emitting device and a control terminal of the drive transistor, anda channel length of the drive transistor is longer than a channel length of the first switching transistor and is longer than a channel length of the second switching transistor.

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