DISPLAY DEVICE

Abstract

A display device includes a display unit in which display elements provided with pixel circuits are arranged so as to have a sequence of three different colors in a row direction and the colors are shifted in a column direction by 1.5 columns. A scanning line is provided in every row of the display unit, a signal line is provided in every column of the display unit, and a column control circuit outputs a display signal for every column. The positions of the pixel circuits are displaced in the row direction with respect to the arrangement of the display elements, and are thus aligned in the column direction and also connected to the signal line only on one side of the signal line. No inversion of the pixel circuit pattern occurs and variations of the circuit characteristics in every row are suppressed.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIGS. 1A and 1B are arrangement drawings of pixel circuits according to a first embodiment of the present invention.

FIGS. 2A and 2B are arrangement drawings of pixel circuits according to a second embodiment of the present invention.

FIG. 3 is a schematic diagram of an active matrix display device.

FIG. 4 shows a pixel circuit in which there is only one control line.

FIG. 5 shows an example of a pixel circuit in which the number of control lines is two.

FIG. 6 shows an example of a display device in which pixels are arranged in a delta shape.

FIGS. 7A and 7B are arrangement drawings of pixel circuits according to Comparison Example 1 of the present invention.

FIGS. 8A and 8B are arrangement drawings of pixel circuits according to Comparison Example 2 of the present invention.

FIGS. 9A and 9B are arrangement drawings of pixel circuits according to a third embodiment of the present invention.

Claims

1. A display device in which a plurality of pixels are arranged in a row direction and a column direction, comprising: display elements expressing one of a plurality of colors and composing a pixel, the display elements being arranged in the row direction so as to express colors in a periodic arrangement which is shifted with respect to an adjacent row by a pixel pitch multiplied by a non-integer;pixel circuits that drive the respective display elements;scanning lines that transmit a row selection signal to the pixel circuits; andsignal lines that transmit a display signal to the pixel circuits,wherein:each of the pixel circuits includes a plurality of circuit elements which are arranged in an area with a same pattern at least in the column direction, and the pixel circuits are displaced in opposite directions in adjacent rows relative to dispositions of the display elements in those adjacent rows; andthe signal lines are straight-line wirings extending in the column direction in a region where the display elements are arranged, and are connected only to pixel circuits aligning in one column along which the respective signal lines are extending.

2. The display device according to claim 1, wherein a connection part between a said signal line and the pixel circuit is provided only on one side of the signal line.

3. The display device according to claim 1, wherein the arrangements of the circuit elements in two adjacent columns symmetric with respect to an axis parallel to the column direction, and a power source line extending in the column direction is arranged between two signal lines in the adjacent columns.

4. The display device according to claim 1, wherein two signal lines are provided in a column, one of which is connected to the pixel circuit only at one side, and the other is connected to the same pixel circuit on the opposite side to the one signal line.

5. The display device according to claim 1, wherein the shift of the arrangement of the display element to that in the adjacent row is 1.5 pixel pitch, and a sum of absolute values of relative displacement of the pixel circuit to the display element is ½ pixel pitch.

6. The display device according to claim 1, wherein the pixel circuit and the display element are arranged while having an overlap and are eclectically connected to each other via a contact hole, and the contact hole in the display element is located at an inversion symmetrical position in every adjacent row.

7. The display device according to claim 6, wherein the contact hole is on a center axis of the pixel circuit, and relative displacements of the pixel circuits to the display elements in two adjacent rows have a same absolute value.

8. The display device according to claim 6, wherein the contact hole is located off the center of the pixel circuit to a left or a right side, and relative displacements of the pixel circuits to the display elements in two adjacent rows have different absolute values.

9. The display device according to claim 1, wherein the display elements include different colors in the column direction, and signals for the different colors are switched and supplied to the signal line.

10. A display device in which a plurality of pixels are arranged in a row direction and a column direction, comprising: display elements expressing one of a plurality of colors and composing a pixel, the display elements being arranged so as to have colors in a periodic arrangement which is shifted with respect to an adjacent row by a pixel pitch multiplied by a non-integer;pixel circuits that drive the display elements;scanning lines that transmit a row selection signal to the pixel circuits;signal lines that transmit a display signal to the pixel circuits; andcolumn control circuits that generate and output a display signal for every column,wherein:each of the pixel circuits includes a plurality of circuit elements arranged in an area with a same pattern at least in the column direction, and the pixel circuits are displaced relative to the display elements in opposite directions in adjacent rows;the signal lines are straight-line wirings extending in the column direction in a region where the display elements are arranged, and are connected only to pixel circuits aligning in one column along which the respective signal lines extend in the column direction; andan output of the column control circuit and the signal line are connected to each other via a switch, and the switch performs a shift of the connection between the output of the column control circuit and the signal line by one column.

11. The display device according to claim 10, wherein the switch is switched in synchronism with a row selection of the scanning line.

12. The display device according to claim 10, wherein a row selection of the scanning line is sequentially performed in every other row, and the switch is switched over in every field where an even number and an odd number of the selected row are exchanged.