Electro-optical device and driving method of the same
First Claim
1. A light-emitting device comprising:
- a plurality of pixels formed over a substrate, each of the plurality of pixels including n×
m memory circuits for storing n-bit digital image signals for m frame periods, wherein the n is a natural number of 2 or more, and the m is 2;
n latch circuits in one column;
n source signal lines in the one column, each electrically connected to each of the n latch circuits; and
one writing gate signal line in one of the plurality of pixels, electrically connected to gates of n writing transistors,wherein periods for emitting light from the plurality of pixels in one frame period among the m frame periods are divided to 2(n−
1), 2(n−
2), . . . , 20 with the n-bit digital image signals, andwherein a gradation of the light-emitting device is configured to be expressed by combining the periods in the one frame period.
1 Assignment
0 Petitions
Accused Products
Abstract
In the electro-optical device for carrying out an image display by using n-bit (n is a natural number) digital image signals, one pixel incorporates n×m (m is a natural number) memory circuits, and has a function to store the digital image signals for m frames in the pixel (in examples shown in the drawings, n=3, m=2, and memory circuits A1 to A3 and B1 to B3 store signals for 3 bits×2 frames). Thus, in the display of a still picture, the digital image signals once stored in the memory circuits are repeatedly read out and a display is carried out for each frame, so that driving of a source signal line driver circuit is stopped during the display. Thus, the electric power consumption of the electro-optical device is reduced.
106 Citations
15 Claims
-
1. A light-emitting device comprising:
-
a plurality of pixels formed over a substrate, each of the plurality of pixels including n×
m memory circuits for storing n-bit digital image signals for m frame periods, wherein the n is a natural number of 2 or more, and the m is 2;n latch circuits in one column; n source signal lines in the one column, each electrically connected to each of the n latch circuits; and one writing gate signal line in one of the plurality of pixels, electrically connected to gates of n writing transistors, wherein periods for emitting light from the plurality of pixels in one frame period among the m frame periods are divided to 2(n−
1), 2(n−
2), . . . , 20 with the n-bit digital image signals, andwherein a gradation of the light-emitting device is configured to be expressed by combining the periods in the one frame period. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A light-emitting device comprising:
-
a plurality of pixels formed over a substrate, each of the plurality of pixels including n×
m memory circuits for storing n-bit digital image signals for m frame periods, wherein the n is a natural number of 2 or more, and the m is 2;n latch circuits in one column; n source signal lines in the one column, each electrically connected to each of the n latch circuits; and n reading gate signal lines in one of the plurality of pixels, each electrically connected to each gate of n reading transistors, wherein periods for emitting light from the plurality of pixels in one frame period among the m frame periods are divided to 2(n−
1), 2(n−
2), . . . , 20 with the n-bit digital image signals, andwherein a gradation of the light-emitting device is configured to be expressed by combining the periods in the one frame period. - View Dependent Claims (7, 8, 9, 10)
-
-
11. A light-emitting device comprising:
-
a plurality of pixels formed over a substrate, each of the plurality of pixels including n×
m memory circuits for storing n-bit digital image signals for m frame periods, wherein the n is a natural number of 2 or more, and the m is 2;n latch circuits in one column; n source signal lines in the one column, each electrically connected to each of the n latch circuits; one writing gate signal line in one of the plurality of pixels, electrically connected to gates of n writing transistors; and n reading gate signal lines in the one of the plurality of pixels, each electrically connected to each gate of n reading transistors, wherein periods for emitting light from the plurality of pixels in one frame period among the m frame periods are divided to 2(n−
1), 2(n−
2), . . . , 20 with the n-bit digital image signals, andwherein a gradation of the light-emitting device is configured to be expressed by combining the periods in the one frame period. - View Dependent Claims (12, 13, 14, 15)
-
Specification