Light emitting display and light emitting display panel

• US 20060076550A1
• Filed: 09/29/2005
• Published: 04/13/2006
• Est. Priority Date: 10/13/2004
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Mobile Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Kwak, Won-Kyu, Park, Sung-Chon
• Granted Patent: US 8,063,852 B2
• Time in Patent Office: Days
• US Class Current: 257/13
• CPC Class Codes: G09G 2300/0443 with several sub-pixels for the same colour in a pixel, not specifically used to display gradations G09G3/364 takes precedence
• CPC Class Codes: G09G 2300/0804 Sub-multiplexed active matrix panel, i.e. wherein one active driving circuit is used at pixel level for multiple image producing elements
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2300/0861 with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: H10K 59/35 comprising red-green-blue [RGB] subpixels

Abstract

A display device according to an embodiment of the present invention includes a pixel driver, first, second, and third light emitting diodes, and first, second, and third switches. The pixel driver outputs a driving current corresponding to a data signal to an output terminal in response to the scan signal. The first, second, and third light emitting diodes emit first, second, and third color lights in response to the driving current respectively. The first, second, and third switches are coupled between the output terminal of the pixel driver and the first, second, and third light emitting diodes respectively. The first, second, and third switches selectively transmit the driving current to the first, second, and third light emitting diodes. Two of light emitting diodes among the first, second, and third light emitting diodes are arranged in a first line, and the remaining one light emitting diode is arranged in a second line different from the first line.

Claims

1. A display device for emitting light comprising:

a plurality of scan lines for transmitting scan signals;

a plurality of data lines for transmitting data signals; and

a plurality of pixel circuits each coupled to a respective scan line and a respective data line, wherein each of the plurality of pixel circuits comprises;

a pixel driver for outputting a driving current corresponding to a respective data signal to an output terminal in response to a respective scan signal;

first, second, and third light emitting elements for emitting first, second, and third color lights respectively, in response to the driving current; and

first, second, and third switches respectively being coupled between the output terminal of the pixel driver and the first, second, and third light emitting elements, wherein the first, second, and third switches selectively transmit the driving current to the first, second, and third light emitting elements respectively,

wherein two light emitting elements among the first, second, and third light emitting elements are arranged in a first line, and the remaining one light emitting element is arranged in a second line different from the first line.

2. The display device of claim 1, wherein the first, second, and third light emitting elements are arranged substantially in a form of a delta (Δ

) shape.

3. The display device of claim 1, wherein the first line and the second line are substantially parallel to the plurality of scan lines.

4. The display device of claim 3, wherein a scan line of the plurality of scan lines is arranged between the first line and the second line.

5. The display device of claim 1, wherein each of the plurality of pixel circuits further comprises:

a first transistor for transmitting the data signal in response to the scan signal;

a first capacitor for storing a voltage corresponding to the data signal transmitted by the first transistor; and

a second transistor for outputting a current corresponding to the data signal.

6. The display device of claim 5, wherein each of the plurality of pixel circuits further comprises:

a third transistor for allowing the second transistor to be diode-connected;

a fourth transistor having a first electrode coupled to a first electrode of the first capacitor, and a second electrode coupled to a second electrode of the first capacitor; and

a second capacitor having a first electrode coupled to the second electrode of the fourth transistor, and a second electrode coupled to a control electrode of the second transistor.

7. A display panel for emitting light comprising:

a plurality of scan lines for transmitting scan signals;

a plurality of data lines for transmitting data signals; and

a plurality of light emitting elements for emitting light corresponding to the data signals in response to the scan signals, the display panel comprising;

a first light emitting element group in which first, second, and third light emitting elements respectively emitting lights of first, second, and third colors are sequentially arranged in a row direction; and

a second light emitting element group in which fourth, fifth, and sixth light emitting elements respectively emitting lights of the second, third, and first colors are sequentially arranged in the row direction,

wherein the first, fourth, and fifth light emitting elements emit light corresponding to the data signal transmitted by one data line in response to the scan line transmitted by one scan line.

8. The display panel of claim 7, wherein one of the plurality of scan lines is arranged between the first light emitting element group and the second light emitting element group.

9. The display panel of claim 7, wherein the second, third, and sixth light emitting elements are driven by a scan signal transmitted through a scan line applied to the first, fourth, and fifth light emitting elements, and are driven by a data signal transmitted through a first data line which is different from a second data line through which the data signal is transmitted to the first, fourth, and fifth light emitting elements.

10. The display panel of claim 7, wherein the first light emitting element is arranged between the fourth and the fifth light emitting elements in a column direction.

11. A display device for emitting light comprising:

a plurality of scan lines for transmitting scan signals;

a plurality of data lines for transmitting data signals; and

a plurality of pixel circuits each coupled to a respective scan line and a respective data line, wherein each of the plurality of pixel circuits respectively comprises;

a first transistor for transmitting a respective data signal in response to a respective scan signal;

a first capacitor for storing a voltage corresponding to the respective data signal transmitted by the first transistor;

a second transistor for outputting a current corresponding to the respective data signal;

first, second, and third light emitting elements for emitting first, second, and third color lights respectively, corresponding to the current output by the second transistor; and

first, second, and third switches selectively transmitting the current transmitted by the second transistor to the first, second, and third light emitting elements respectively,

wherein the first, second, and third light emitting elements are arranged substantially in a form of a delta (Δ

) shape.

12. The display device of claim 11, wherein each of the plurality of pixel circuits further comprises:

a third transistor for allowing the second transistor to be diode connected;

a fourth transistor having a first electrode coupled to a first electrode of the first capacitor, and a second electrode coupled to a second electrode of the first capacitor; and

a second capacitor having a first electrode coupled to the second electrode of the fourth transistor, and a second electrode coupled to a control electrode of the second transistor.

13. A display device comprising:

a plurality of pixels for emitting light, each of the plurality of pixels including a first organic light emitting diode (OLED), a second OLED and a third OLED;

a plurality of scan lines for transmitting a plurality of scan signals;

a plurality of data lines for transmitting a plurality of data signals; and

a plurality of pixel circuits each coupled to a respective scan line and a respective data line,

wherein each of the plurality of pixel circuits drives the first OLED, the second OLED and the third OLED of a respective pixel.

14. The display device of claim 13, wherein the first OLED, the second OLED and the third OLED of a respective pixel are arranged in a form of a delta (Δ

) shape.

15. The display device of claim 13, wherein the first OLED, the second OLED and the third OLED of a respective pixel are arranged in a form of an inverted triangle (∇

) shape.

16. The display device of claim 13, wherein each of the plurality of pixel circuits comprises:

a pixel driver for outputting a driving current corresponding to a respective data signal to an output terminal in response to a respective scan signal;

first, second, and third light emitting elements for emitting first, second, and third color lights respectively, in response to the driving current; and

first, second, and third switches respectively being coupled between the output terminal of the pixel driver and the first, second, and third light emitting elements, wherein the first, second, and third switches selectively transmit the driving current to the first, second, and third light emitting elements respectively,

wherein two light emitting elements among the first, second, and third light emitting elements are arranged in a first line, and the remaining one light emitting element is arranged in a second line different from the first line.

17. The display device of claim 13, wherein the first line and the second line are substantially parallel to the plurality of scan lines.

18. The display device of claim 17, wherein a scan line of the plurality of scan lines is arranged between the first line and the second line.

19. The display device of claim 13, wherein each of the plurality of pixel circuits further comprises:

a first transistor for transmitting the data signal in response to the scan signal;

a first capacitor for storing a voltage corresponding to the data signal transmitted by the first transistor; and

a second transistor for outputting a current corresponding to the data signal.

20. The display device of claim 19, wherein each of the plurality of pixel circuits further comprises:

a third transistor for allowing the second transistor to be diode-connected;

a fourth transistor having a first electrode coupled to a first electrode of the first capacitor, and a second electrode coupled to a second electrode of the first capacitor; and

a second capacitor having a first electrode coupled to the second electrode of the fourth transistor, and a second electrode coupled to a control electrode of the second transistor.