Display panel including a plurality of lighting emitting elements

• US 9,324,773 B2
• Filed: 10/10/2014
• Issued: 04/26/2016
• Est. Priority Date: 01/24/2003
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Fujii, Teruyuki, Yamazaki, Shunpei
• Primary Examiner(s): Chambliss, Alonzo
• Application Number:
  US14/512,094
• Publication Number:
  US 20150123101A1
• Time in Patent Office: 564 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 1/1637 Details related to the display arrangement, including those related to the mounting of the display in the housing
• CPC Class Codes: G09G 2300/08 Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2380/14 Electronic books and readers
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 27/156 two-dimensional arrays
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 31/0232 Optical elements or arrangements associated with the device H01L31/0236 takes precedence; for photovoltaic cells H01L31/054; for photovoltaic modules H02S40/20
• CPC Class Codes: H01L 33/08 with a plurality of light emitting regions, e.g. laterally discontinuous light emitting layer or photoluminescent region integrated within the semiconductor body H01L27/15 takes precedence
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• CPC Class Codes: H01L 33/60 Reflective elements
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/84 Passivation; Containers; Encapsulations
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 59/122 : Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/127 : comprising two substrates, e.g. display comprising OLED array and TFT driving circuitry on different substrates
• CPC Class Codes: H10K 59/128 : comprising two independent displays, e.g. for emitting information from two major sides of the display
• CPC Class Codes: H10K 59/8722 : Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/873 : Encapsulations
• CPC Class Codes: H10K 71/166 : using selective deposition, e.g. using a mask
• CPC Class Codes: Y10T 428/24942 : including components having same physical characteristic in differing degree

Abstract

One pixel is divided into a first region including a first light emitting element and a second region including a second light emitting element, wherein the first region emits light in one direction and the second region emits light in the direction opposite to that of the first region. Independently driving the first light emitting element and the second light emitting element allows images to be displayed independently on the surface.

Claims

1. A display panel comprising:

a plurality of light emitting elements,

wherein the plurality of light emitting elements comprise a first light emitting element and a second light emitting element,

wherein an insulating film is located over and in contact with a first electrode of the first light emitting element and a first electrode of the second light emitting element,

wherein the first light emitting element comprises;

a light emitting layer over the first electrode of the first light emitting element and the insulating film; and

a second electrode over the light emitting layer,

wherein the display panel is a double-sided light emitting display panel.

2. The display panel according to claim 1, wherein the insulating film covers an end of the first electrode of the first light emitting element and an end of the first electrode of the second light emitting element.

3. The display panel according to claim 1, wherein each of a bottom surface of the first electrode, a bottom surface of the second electrode, and a bottom surface of the insulating film is in contact with a surface.

4. The display panel according to claim 1,

wherein light emitted from one of the plurality of light emitting elements is extracted from a first display surface of the display panel,

wherein light emitted from the other one of the plurality of light emitting elements is extracted from a second display surface of the display panel,

wherein the second display surface is an opposite surface of the first display surface, and

wherein the display panel is capable of controlling so that one of the first display surface and the second display surface does not display an image when the other one of the first display surface and the second display surface displays an image.

5. The display panel according to claim 1,

wherein the first electrode of the first light emitting element comprises a first transparent electrode, and

wherein the second electrode of the first light emitting element comprises a second transparent electrode and a reflecting electrode over the second transparent electrode.

6. The display panel according to claim 1, wherein the first light emitting element satisfies a condition for enhancing light with a wavelength of a visible region by an optical interference effect.

7. A notebook computer comprising the display panel according to claim 1.

8. An electronic book comprising the display panel according to claim 1, wherein the electronic book is capable of displaying two pages at the same time by the display panel.

9. A personal digital assistants comprising the display panel according to claim 1, wherein the personal digital assistants is capable of viewing of websites.

10. A display panel comprising:

a first substrate comprising plastic;

a plurality of light emitting elements over the first substrate; and

a second substrate over the plurality of light emitting elements,

wherein the plurality of light emitting elements comprise a first light emitting element and a second light emitting element,

wherein an insulating film is located over and in contact with a first electrode of the first light emitting element and a first electrode of the second light emitting element,

wherein the first light emitting element comprises;

a light emitting layer over the first electrode of the first light emitting element and the insulating film; and

a second electrode over the light emitting layer,

wherein the display panel is a double-sided light emitting display panel.

11. The display panel according to claim 10, wherein the insulating film covers an end of the first electrode of the first light emitting element and an end of the first electrode of the second light emitting element.

12. The display panel according to claim 10, wherein each of a bottom surface of the first electrode, a bottom surface of the second electrode, and a bottom surface of the insulating film is in contact with a surface.

13. The display panel according to claim 10,

wherein light emitted from one of the plurality of light emitting elements is extracted from a first display surface of the display panel,

wherein light emitted from the other one of the plurality of light emitting elements is extracted from a second display surface of the display panel,

wherein the second display surface is an opposite surface of the first display surface, and

wherein the display panel is capable of controlling so that one of the first display surface and the second display surface does not display an image when the other one of the first display surface and the second display surface displays an image.

14. The display panel according to claim 10,

wherein the first electrode of the first light emitting element comprises a first transparent electrode, and

wherein the second electrode of the first light emitting element comprises a second transparent electrode and a reflecting electrode over the second transparent electrode.

15. The display panel according to claim 10, wherein the first light emitting element satisfies a condition for enhancing light with a wavelength of a visible region by an optical interference effect.

16. A notebook computer comprising the display panel according to claim 10.

17. An electronic book comprising the display panel according to claim 10, wherein the electronic book is capable of displaying two pages at the same time by the display panel.

18. A personal digital assistants comprising the display panel according to claim 10, wherein the personal digital assistants is capable of viewing of websites.

19. A display panel comprising:

a plurality of light emitting elements,

wherein the plurality of light emitting elements comprise a first light emitting element and a second light emitting element,

wherein an insulating film is located over and in contact with a first electrode of the first light emitting element and a first electrode of the second light emitting element,

wherein the first light emitting element comprises;

a light emitting layer over the first electrode of the first light emitting element and the insulating film; and

a second electrode over the light emitting layer,

wherein the first electrode of the first light emitting element comprises a first transparent electrode, and

wherein the second electrode of the first light emitting element comprises a second transparent electrode and a reflecting electrode over the second transparent electrode.

20. The display panel according to claim 19, wherein the insulating film covers an end of the first electrode of the first light emitting element and an end of the first electrode of the second light emitting element.

21. The display panel according to claim 19, wherein each of a bottom surface of the first electrode, a bottom surface of the second electrode, and a bottom surface of the insulating film is in contact with a surface.

22. The display panel according to claim 19,

wherein light emitted from one of the plurality of light emitting elements is extracted from a first display surface of the display panel,

wherein light emitted from the other one of the plurality of light emitting elements is extracted from a second display surface of the display panel,

wherein the second display surface is an opposite surface of the first display surface, and

wherein the display panel is capable of controlling so that one of the first display surface and the second display surface does not display an image when the other one of the first display surface and the second display surface displays an image.

23. The display panel according to claim 19, wherein the first light emitting element satisfies a condition for enhancing light with a wavelength of a visible region by an optical interference effect.

24. A notebook computer comprising the display panel according to claim 19.

25. An electronic book comprising the display panel according to claim 19, wherein the electronic book is capable of displaying two pages at the same time by the display panel.

26. A personal digital assistants comprising the display panel according to claim 19, wherein the personal digital assistants is capable of viewing of websites.