ELECTROPHORETIC DISPLAY AND ELECTRONIC DEVICE

• US 20110205195A1
• Filed: 02/15/2011
• Published: 08/25/2011
• Est. Priority Date: 02/19/2010
• Status: Active Grant

• Current Assignee: E Ink Corporation (E Ink Holdings Incorporated)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Sato, Takashi, Komatsu, Yuko
• Granted Patent: US 8,593,438 B2
• Time in Patent Office: Days
• US Class Current: 345/204
• CPC Class Codes: G09G 2300/0876 Supplementary capacities in pixels having special driving circuits and electrodes instead of being connected to common electrode or ground; Use of additional capacitively coupled compensation electrodes
• CPC Class Codes: G09G 2320/0219 Reducing feedthrough effects in active matrix panels, i.e. voltage changes on the scan electrode influencing the pixel voltage due to capacitive coupling
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 3/344 based on particles moving in a fluid or in a gas, e.g. electrophoretic devices electrophoretic devices per se G02F1/167

Abstract

An electrophoretic display includes a first substrate, a second substrate, an electrophoretic element interposed therebetween, a plurality of scanning lines on an electrophoretic element side surface of the first substrate, a plurality of data lines extending in the crosswise directions of the plurality of scanning lines on the electrophoretic element side surface of the first substrate, a selection transistor connected to one of the scanning lines and one of the data lines, a pixel electrode connected to the selection transistor, and a capacitor with two electrodes, one of the electrode thereof being connected to the selection transistor and the pixel electrode, and the other electrode thereof being connected to one of the scanning lines, wherein a plurality of pixel electrodes are arranged so that a dot density thereof is more than or equal to 200 dpi.

Claims

1. An electrophoretic display comprising:

a first substrate;

a second substrate;

an electrophoretic element interposed therebetween;

a plurality of scanning lines on an electrophoretic element side surface of the first substrate;

a plurality of data lines extending in the crosswise directions of the plurality of scanning lines on the electrophoretic element side surface of the first substrate;

a selection transistor connected to one of the scanning lines and one of the data lines;

a pixel electrode connected to the selection transistor; and

a capacitor with two electrodes, one of the electrode thereof being connected to the selection transistor and the pixel electrode, and the other electrode thereof being connected to one of the scanning lines,

wherein a plurality of pixel electrodes are arranged so that a dot density thereof is more than or equal to 200 dpi.

4. The electrophoretic display according to claim 1, wherein the one of the scanning lines connected to the other electrode of the capacitor is a scanning line, which is driven immediately before the one of the scanning line, the scanning line connected to the pixel electrode of the capacitor corresponds.

5. An electronic device comprising the electrophoretic apparatus of claim 1.

8. An electronic device comprising the electrophoretic apparatus of claim 4.

2. An electrophoretic display comprising:

a first substrate;

a second substrate;

an electrophoretic element interposed therebetween;

a plurality of scanning lines on an electrophoretic element side surface of the first substrate;

a plurality of data lines extending in the crosswise directions of the plurality of scanning lines on the electrophoretic element side surface of the first substrate;

a selection transistor connected to one of the scanning lines and one of the data lines;

a pixel electrode connected to the selection transistor; and

a capacitor with two electrodes, one of the electrode thereof being connected to the selection transistor and the pixel electrode, and the other electrode thereof being connected to one of the scanning lines,

wherein a parasitic capacitance Cgs of the selection transistor is less than or equal to 1% of a capacitance Cs of the capacitor.

6. An electronic device comprising the electrophoretic apparatus of claim 2.

3. An electrophoretic display comprising:

a first substrate;

a second substrate;

an electrophoretic element interposed therebetween;

a plurality of scanning lines on an electrophoretic element side surface of the first substrate;

a plurality of data lines extending in the crosswise directions of the plurality of scanning lines on the electrophoretic element side surface of the first substrate;

a plurality of capacitor lines formed so as to correspond to the respective scanning lines or the respective data lines;

a selection transistor connected to one of the scanning lines and one of the data lines;

a pixel electrode connected to the selection transistor; and

a capacitor having one electrode connected to the selection transistor and the pixel electrode,

wherein the capacitor includes a first capacitor having the other electrode connected to one of the scanning lines, and a second capacitor having the other electrode connected to one of the capacitor lines.

7. An electronic device comprising the electrophoretic apparatus of claim 3.