DISPLAY DEVICE

• US 20170249896A1
• Filed: 01/04/2017
• Published: 08/31/2017
• Est. Priority Date: 02/29/2016
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: KIM, Yang Wan, Kwon, Sun Ja, Kim, Byung Sun, Park, Hyun Ae, Lee, Su Jin, Lee, Jae Yong
• Granted Patent: US 10,490,122 B2
• Time in Patent Office: Days
• CPC Class Codes: G09G 2300/0413 Details of dummy pixels or dummy lines in flat panels
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• 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 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 3/3225 using an active matrix
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3266 Details of drivers for scan electrodes
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H10K 59/1213 the pixel elements being TFTs
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/88 Dummy elements, i.e. elements having non-functional features

Abstract

A display device includes a substrate including a first pixel region and a second pixel region having a smaller area than the first pixel region. The second pixel region is connected to the first pixel region. A first pixel is provided in the first pixel region and a second pixel is provided in the second pixel region. A first line is connected to the first pixel and a second line is connected to the second pixel. A dummy unit overlaps at least one of the first line and the second line, and compensates for a difference in load values between the first and second lines.

Claims

1. A display device, comprising:

a substrate including a first pixel region and a second pixel region having a smaller area than the first pixel region, wherein the second pixel region is connected to the first pixel region;

a first pixel provided in the first pixel region and a second pixel provided in the second pixel region;

a first line connected to the first pixel and a second line connected to the second pixel; and

a dummy unit overlapping at least one of the first line and the second line, and compensating for a difference in load values between the first and second lines.

2. The display device of claim 1, wherein the first line is longer than the second line.

3. The display device of claim 2, further comprising a data line for providing the first pixel and the second pixel with a data signal,

wherein the first line is a first scan line for providing a scan signal to the first pixel and the second line is a second scan line for providing the scan signal to the second pixel.

4. The display device of claim 3, wherein the dummy unit overlaps the second scan line.

5. The display device of claim 4, further comprising a power line for providing the first pixel and the second pixel with power,

wherein the dummy unit is connected to the power line.

6. The display device of claim 5, wherein the dummy unit is provided on a same layer as the power line, and the dummy unit includes a same material as the power line.

7. The display device of claim 5, wherein the dummy unit protrudes from the power line and the dummy unit is integrally formed with the power line.

8. The display device of claim 7, further comprising a plurality of second pixels in the second pixel region, wherein the plurality of second pixels are respectively connected to a plurality of second scan lines,

wherein an overlapping area between the dummy unit and a first scan line of the plurality of second scan lines is greater than an overlapping area between the dummy unit and a second scan line of the plurality of second scan lines, and wherein the first scan line of the plurality of second scan lines is shorter than the second scan line of the plurality of second scan lines.

9. The display device of claim 4, wherein the second pixel comprises a transistor connected to the second scan line and the data line, wherein the transistor comprises:

an active pattern provided on the substrate;

a gate electrode provided on the active pattern;

a gate insulating layer interposed between the active pattern and the gate electrode; and

a source electrode and a drain electrode connected to the active pattern,

wherein the dummy unit is provided on a same layer as the active pattern and includes a same material as the active pattern.

10. The display device of claim 9, wherein the dummy unit protrudes from the active pattern and the dummy unit is integrally formed with the active pattern.

11. The display device of claim 10, further comprising a plurality of second pixels in the second pixel region, wherein the plurality of second pixels are respectively connected to a plurality of second scan lines,

wherein an overlapping area between the dummy unit and a first scan line of the plurality of second scan lines is greater than an overlapping area between the dummy unit and a second scan line of the plurality of second scan lines, and wherein the first scan line of the plurality of second scan lines is shorter than the second scan line of the plurality of second scan lines.

12. The display device of claim 9, further comprising a power line for providing the first pixel and the second pixel with power.

13. The display device of claim 3, wherein the substrate further comprises a first peripheral region bordering the first pixel region and a second peripheral region bordering the second pixel region, and

the dummy unit is provided in the second peripheral region and includes a dummy line overlapped with an end portion of the second scan line.

14. The display device of claim 13, wherein a fixed voltage is applied to the dummy line.

15. The display device of claim 14, further comprising a power line for providing the first pixel and the second pixel with power,

wherein the dummy line receives a same voltage as the power line.

16. The display device of claim 13, further comprising a scan line pad provided at the end portion of the second scan line,

wherein the dummy line covers the scan line pad.

17. The display device of claim 16, further comprising a plurality of second pixels in the second pixel region, wherein the plurality of second pixels are respectively connected to a plurality of second scan lines, wherein each of plurality of second scan lines comprises a scan line pad provided at the end thereof in the second peripheral region,

wherein an overlapping area between the dummy unit and a scan line pad of a first scan line of the plurality of second scan lines is greater than an overlapping area between the dummy unit and a scan line pad of a second scan line of the plurality of second scan lines, wherein the first scan line of the plurality of second scan lines is shorter than the second scan line of the plurality of second scan lines.

18. The display device of claim 3, wherein the substrate further comprises a first peripheral region surrounding the first pixel region and a second peripheral region surrounding the second pixel region,

wherein the dummy unit is provided in the second peripheral region, and the dummy unit is configured to provide a plurality of dummy loads having different load values.

19. The display device of claim 18, further comprising a plurality of second pixels in the second pixel region, wherein the plurality of second pixels are respectively connected to a plurality of second scan lines,

wherein each of the plurality of second scan lines is electrically connected to the dummy unit to receive at least one of the plurality of dummy loads, and

a load value of a dummy load received by a first scan line of the plurality of second scan lines is greater than a load value of a dummy load received by a second scan line of the plurality of second scan lines, wherein the first scan line of the plurality of second scan lines is longer than the second scan line of the plurality of second scan lines.

20. The display device of claim 19, wherein the load value of each of the plurality of dummy loads is reduced from the dummy load connected to the second scan line of a long length to the dummy load connected to the second scan line of a short length.

21. The display device of claim 2, wherein the substrate further comprises a third pixel region spaced apart from the second pixel region and connected to the first pixel region.

22. The display device of claim 21, further comprising:

a third pixel provided in the third pixel region; and

a third scan line for providing the third pixel with a scan signal,

wherein the third scan line has a shorter length than the first scan line or the second scan line.

23. The display device of claim 22, further comprising an additional dummy unit overlapping the third scan line and compensating for a load difference between the third scan line and the first scan line or for a load difference between the third scan line and the second scan line.

24. The display device of claim 22, wherein the first scan line and the third scan line are parallel with respect to each other along a first direction, and the second scan line and the third scan line are spaced apart from each other.

25. The display device of claim 22, wherein the substrate further comprises a first peripheral region adjacent to the first pixel region, a second peripheral region adjacent to the second pixel region and a third peripheral region adjacent to the third pixel region.

26. The display device of claim 25, further comprising a first driver connected to the first scan line, a second driver connected to the second scan line and a third driver connected to the third scan line,

wherein the first driver is provided in the first peripheral region, the second driver is provided in the second peripheral region and the third driver is provided in the third peripheral region.

27. A display device, comprising:

a substrate including a first pixel region, a second pixel region connected to the first pixel region, and a third pixel region spaced apart from the second pixel region, wherein the second pixel region is smaller than the first pixel region;

a first pixel is provided in the first pixel region, a second pixel is provided in the second pixel region and a third pixel is provided in the third pixel region;

a first scan line is connected to the first pixel, a second scan line is connected to the second pixel and a third scan line is connected to the third pixel; and

a first dummy unit is overlapped with the second scan line and a second dummy unit is overlapped with the third scan line, wherein the first and second dummy units compensate for a difference in load values between the first, second and third scan lines.

28. The display device of claim 27, wherein the first scan line is longer than the second scan line and the third scan line.

29. The display device of claim 28, further comprising a first data line for providing the first pixel and the second pixel with a data signal.

30. The display device of claim 29, further comprising a power line for providing the first pixel and the second pixel with power,

wherein the first dummy unit is connected to the power line.

31. The display device of claim 30, wherein the first dummy unit is provided on a same layer as the power line and includes a same material as the power line.

32. The display device of claim 30, wherein the first dummy unit protrudes from the power line, and the first dummy unit is integrally formed with the power line.

33. The display device of claim 32, further comprising a plurality of second pixels in the second pixel region, wherein the plurality of second pixels are respectively connected to a plurality of second scan lines,

wherein an overlapping area between the first dummy unit and a first scan line of the plurality of second scan lines is greater than an overlapping area between the first dummy unit and a second scan line of the plurality of second scan lines, and wherein the first scan line of the plurality of second scan lines is shorter than the second scan line of the plurality of second scan lines.

34. The display device of claim 29, wherein the display device comprises a transistor, wherein the transistor is connected to the second scan line and the first data line of the second pixel or to the third scan line and a second data line of the third pixel,

wherein the transistor comprises:

an active pattern provided on the substrate;

a gate electrode provided on the active pattern;

a gate insulating layer interposed between the active pattern and the gate electrode; and

a source electrode and a drain electrode connected to the active pattern,

wherein the first dummy unit or the second dummy unit is provided on a same layer as the active pattern, and includes a same material as the active pattern.

35. The display device of claim 34, wherein the first dummy unit is provided on a same layer as a power line and includes a same material as the power line.

36. The display device of claim 35, further comprising a plurality of second pixels in the second pixel region, wherein the plurality of second pixels are respectively connected to a plurality of second scan lines,

wherein an overlapping area between the first dummy unit and a first scan line of the plurality of second scan lines is greater than an overlapping area between the first dummy unit and a second scan line of the plurality of second scan lines, and wherein the first scan line of the plurality of second scan lines is shorter than the second scan line of the plurality of second scan lines.

37. The display device of claim 29, wherein the substrate further comprises a first peripheral region to a third peripheral region respectively bordering the first pixel region to the third pixel region,

wherein the first dummy unit includes a first dummy line provided in the second peripheral region and the second dummy unit includes a second dummy line provided in the third peripheral region, wherein the first dummy line overlaps an end portion of the second scan line and the second dummy line overlaps an end portion of the third scan line.

38. The display device of claim 37, wherein a fixed voltage is applied to the first and second dummy lines.

39. The display device of claim 38, further comprising a power line for providing the first pixel and the second pixel with power,

wherein the first and second dummy lines receive a same voltage as the power line.

40. The display device of claim 38, further comprising a scan line pad provided at an end portion of the second scan line,

wherein the first dummy line covers the scan line pad.

41. The display device of claim 40, further comprising a plurality of second pixels in the second pixel region, wherein the plurality of second pixels are respectively connected to a plurality of second scan lines, wherein each of plurality of second scan lines comprises a scan line pad provided at the end thereof in the second peripheral region,

wherein an overlapping area between the first dummy unit and a scan line pad of a first scan line of the plurality of second scan lines is greater than an overlapping area between the first dummy unit and a scan line pad of a second scan line of the plurality of second scan lines, wherein the first scan line of the plurality of second scan lines is shorter than the second scan line of the plurality of second scan lines.

42. The display device of claim 29, wherein the substrate further comprises a first peripheral region to a third peripheral region respectively bordering the first pixel region to the third pixel region, and

wherein the first dummy unit is provided in the second peripheral region and the second dummy unit is provided in the third peripheral region, and wherein each of the first and second dummy units are configured to provide a plurality of dummy loads having different load values.

43. The display device of claim 42, further comprising a plurality of second pixels in the second pixel region, wherein the plurality of second pixels are respectively connected to a plurality of second scan lines,

wherein each of the plurality of second scan lines is electrically connected to the first dummy unit to receive at least one of the plurality of dummy loads, and

a load value of a dummy load received by a first scan line of the plurality of second scan lines is greater than a load value of a dummy load received by a second scan line of the plurality of second scan lines, wherein the first scan line of the plurality of second scan lines is longer than the second scan line of the plurality of second scan lines.

44. The display device of claim 42, wherein the load value of each of the plurality of first dummy loads is reduced from the dummy load connected to the second scan line of a long length to the dummy load connected to the second scan line of a short length.

45. A display device, comprising:

a first pixel region and a second pixel region, wherein the first and second pixel regions have different shapes or sizes with respect to each other;

a first peripheral region disposed adjacent to the first pixel region and a second peripheral region disposed adjacent to the second pixel region;

a first pixel provided in the first pixel region;

a second pixel and a third pixel provided in the second pixel region;

a first scan line connected to the first pixel and partially disposed in the first peripheral region, a second scan line connected to the second pixel and partially disposed in the second peripheral region, and a third scan line connected to the third pixel and partially disposed in the second peripheral region, wherein at least two of the first, second and third scan lines have different lengths; and

a first dummy line overlapping at least one of the first, second and third scan lines in the first and second peripheral regions to generate a capacitance difference between the first dummy line and the at least two of the first, second and third scan lines that have different lengths.

46. The display device of claim 45, wherein the second and third scan lines are the at least two of the first, second and third scan lines that have different lengths, wherein the second scan line is longer than the third scan line, and wherein an overlap between the first dummy line and the second scan line is smaller than an overlap between the first dummy line and the third scan line.

47. The display device of claim 46, wherein the display device is an organic light emitting diode (OLED) display device.