Display device

• US 6,529,213 B1
• Filed: 01/27/2000
• Issued: 03/04/2003
• Est. Priority Date: 01/29/1999
• Status: Expired due to Term

• Current Assignee: Intellectual Keystone Technology LLC
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Kimura, Mutsumi
• Primary Examiner(s): CHANG, KENT WU
• Application Number:
  US09/492,293
• Time in Patent Office: 1,132 Days
• Field of Search: 345/589, 345/613, 345/690, 345/695, 345/696, 345/694, 345/76, 345/205
• US Class Current: 345/696
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2310/0262 The addressing of the pixel, in a display other than an active matrix LCD, involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependent on signals of two data electrodes
• CPC Class Codes: G09G 2320/0247 Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes
• CPC Class Codes: G09G 3/2074 using sub-pixels
• CPC Class Codes: G09G 3/30 using electroluminescent panels
• CPC Class Codes: G09G 3/3258 with pixel circuitry controlling the voltage across the light-emitting element

Abstract

Luminescent portions correspondent to each gradation are arranged point-symmetrically with one another around a prescribed position provided at the center, thereby forming a unit pixel element including a plurality of luminescent elements. Such a structure allows provision of a display device wherein a luminous center does not shift for each gradation. Accordingly, when the brightness of the displayed images is changed, unfavorable shifting of display positions does not take place. The present invention thus solves defects related to the picture quality, such as flickering of images, or an impression of unnatural display or fatigue caused to the viewer.

Claims

1. A display device comprising:

a first luminescent element and a first driving transistor for controlling the first luminescent element;

a pair of second luminescent elements, the first luminescent element being positioned therebetween; and

a second driving transistor controlling at least both of the second luminescent elements.

2. The display device according to claim 1, further comprising a first scanning line that controls at least both of the second luminescent elements.

3. The display device according to claim 2, further comprising a second scanning line that controls the first luminescent element.

4. The display device according to claim 1, each of the pair of the second luminescent elements including a plurality of luminescent elements.

5. The display device according to claim 1, further comprising a pair of third luminescent elements, the first luminescent element positioned therebetween.

6. The display device according to claim 5, further comprising a third driving transistor controlling at least both of the third luminescent elements.

7. The display device according to claim 6, wherein the pair of the second luminescent elements are in symmetrical position with respect to the first luminescent element.

8. The display device according to claim 1, further comprising a plurality of pixel units, each of the pixel units including the first and second luminescent elements.

9. A display device comprising:

a first luminescent element and a first scanning line that controls the first luminescent element;

a pair of second luminescent elements and a second common scanning line that controls the second pair of luminescent elements; and

a pair of third luminescent elements and a third common scanning line that controls the third pair of luminescent elements,

the first luminescent element being positioned between the pair of second luminescent element and between the pair of the third luminescent elements

each of the pair of the second luminescent elements and the pair of the third luminescent elements being controlled by a common scanning line, respectively.

10. The display device according to claim 9, further comprising a driving transistor, at least one of the pair of the second luminescent elements and the pair of the third luminescent elements being controlled by the driven transistor.

11. The display device according to claim 9, wherein the pair of the second luminescent elements are in symmetrical position with respect to the first luminescent element.

12. The display device according to claim 11, wherein the pair of the third luminescent elements are in symmetrical position with respect to the first luminescent element.

13. The display device according to claim 9, further comprising a plurality of pixel units, each of the pixel units including the first, the second and the third luminescent elements.

14. A display device comprising:

a first luminescent element and a first scanning line that controls the first luminescent element;

a pair of second luminescent elements, the first luminescent element being positioned therebetween; and

a second common scanning line controlling the pair of second luminescent elements.

15. The display device according to claim 14, further comprising a driving transistor controlling at least the pair of the second luminescent elements.

16. The display device according to claim 14, each of the pair of the second luminescent elements including a plurality of luminescent elements.

17. The display device according to claim 14, further comprising a pair of third luminescent elements, the first luminescent element positioned therebetween.

18. The display device according to claim 17, further comprising a third driving transistor controlling at least both of the third luminescent elements.

19. The display device according to claim 15, wherein the pair of the second luminescent elements are in symmetrical position with respect to the first luminescent element.

20. The display device according to claim 15, further comprising a plurality of pixel units, each of the pixel units including the first and second luminescent elements.