Display, display drive method, method of manufacturing display, and electronic apparatus

• US 9,219,087 B2
• Filed: 02/21/2014
• Issued: 12/22/2015
• Est. Priority Date: 03/04/2013
• Status: Active Grant

• Current Assignee: JDI Design and Development GK
• Original Assignee: JOLED Inc.
• Inventors: Jinta, Seiichiro, Yoshinaga, Tadahiko
• Primary Examiner(s): CERULLO, LILIANA P
• Application Number:
  US14/186,125
• Publication Number:
  US 20140247200A1
• Time in Patent Office: 669 Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: H01L 27/1225 with semiconductor materials not belonging to the group IV of the periodic table, e.g. InGaZnO
• CPC Class Codes: H01L 27/1259 Multistep manufacturing methods
• 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: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/32 Stacked devices having two or more layers, each emitting at different wavelengths
• CPC Class Codes: H10K 59/351 comprising more than three subpixels, e.g. red-green-blue-white [RGBW]
• CPC Class Codes: H10K 59/38 comprising colour filters or colour changing media [CCM]
• CPC Class Codes: H10K 59/90 Assemblies of multiple devices comprising at least one organic light-emitting element

Abstract

A display unit includes a plurality of display function layers provided in a stacking direction, and each including a plurality of pixel circuits. A pixel circuit group configured by predetermined number of the pixel circuits configures a single display pixel, and the predetermined number of the pixel circuits spans the plurality of display function layers.

Claims

1. A display unit, comprising

a plurality of display function layers provided in a stacking direction, and each including a plurality of pixel circuits,

wherein a pixel circuit group including predetermined number of the pixel circuits provides a single display pixel, and the predetermined number of the pixel circuits are associated with the plurality of display function layers,

wherein the plurality of display function layers includes a first display function layer and a second display function layer, the first display function layer being provided on a display surface side, and the second display function layer being provided on a side opposite to the display surface side,

wherein the first display function layer includes a first light emitting layer that emits light of a color, and the second display function layer includes a second light emitting layer that emits light of a complementary color of the color,

wherein the first display function layer further includes

a first transistor layer,

a first anode provided between the first light emitting layer and the first transistor layer and provided for each of the pixel circuits, and

a first cathode disposed on a side, of the first light emitting layer, opposite to the first transistor layer, and

the second display function layer further includes

a second transistor layer,

a second anode provided between the second light emitting layer and the second transistor layer and provided for each of the pixel circuits, and

a second cathode disposed on a side, of the second light emitting layer, opposite to the second transistor layer,

wherein the first transistor layer is provided on the display surface side of the first light emitting layer in the first display function layer, and the second transistor layer is provided on a side opposite to the display surface side of the second light emitting layer in the second display function layer, and

wherein a conductive layer is further provided between the first cathode and the second cathode, and the conductive layer electrically conducting the first cathode to the second cathode.

2. The display unit according to claim 1, wherein one or both of the first cathode and the second cathode includes a plurality of projecting portions each projecting from one of the first cathode and the second cathode to the other of the first cathode and the second cathode.

3. The display unit according to claim 2, wherein the first cathode and the second cathode are in contact with each other by the projecting portions.

4. The display unit according to claim 2, wherein the projecting portions are provided to partially enclose a first light emitting region corresponding to each of the first anodes, or enclose a second light emitting region corresponding to each of the second anodes.

5. The display unit according to claim 1, wherein

one of the first cathode and the second cathode includes a plurality of projecting portions each projecting to the other of the first cathode and the second cathode, and

the other of the first cathode and the second cathode includes a plurality of depression portions fitted with the respective projecting portions.

6. The display unit according to claim 1, wherein a second light emitting region corresponding to each of the second anodes is smaller than a first light emitting region corresponding to each of the first anodes.

7. The display unit according to claim 1, wherein

the first display function layer includes one or more first pixel circuits configuring part of the pixel circuit group,

the second display function layer includes a plurality of second pixel circuits configuring rest of the pixel circuit group,

the first display function layer includes a first scan line and a first power line connected to the one or more first pixel circuits,

the second display function layer includes a second scan line and a second power line connected to the plurality of second pixel circuits,

the first scan line is connected to the second scan line, and

the first power line is connected to the second power line.

8. The display unit according to claim 7, further comprising:

a scan line drive section provided in one of the first display function layer and the second display function layer, and configured to drive the first scan line and the second scan line; and

a power line drive section provided in the other of the first display function layer and the second display function layer, and configured to drive the first power line and the second power line.

9. The display unit according to claim 1, wherein

the display pixel includes sub-pixels, and

each of the sub-pixels includes a light emitting region in one of the first display function layer and the second display function layer.

10. The display unit according to claim 1, further comprising a color filter layer provided as a layer different from the first display function layer and the second display function layer.

11. An electronic apparatus provided with a display unit and a control section configured to perform operation control on the display unit, the display unit comprising:

a plurality of display function layers provided in a stacking direction, and each including a plurality of pixel circuits,

wherein a pixel circuit group including predetermined number of the pixel circuits provides a single display pixel, and the predetermined number of the pixel circuits are associated with the plurality of display function layers

wherein the plurality of display function layers includes a first display function layer and a second display function layer, the first display function layer being provided on a display surface side, and the second display function layer being provided on a side opposite to the display surface side,

wherein the first display function layer includes a first light emitting layer that emits light of a color, and the second display function layer includes a second light emitting layer that emits light of a complementary color of the color,

wherein the first display function layer further includes

a first transistor layer,

a first anode provided between the first light emitting layer and the first transistor layer and provided for each of the pixel circuits, and

a first cathode provided on a side, of the first light emitting layer, opposite to the first transistor layer, and

the second display function layer further includes

a second transistor layer,

a second anode provided between the second light emitting layer and the second transistor layer and provided for each of the pixel circuits, and

a second cathode disposed on a side, of the second light emitting layer, opposite to the second transistor layer,

wherein the first transistor layer is provided on the display surface side of the first light emitting layer in the first display function layer, and the second transistor layer is provided on a side opposite to the display surface side of the second light emitting layer in the second display function layer, and

wherein a conductive layer is further provided between the first cathode and the second cathode, and the conductive layer electrically conducting the first cathode to the second cathode.

12. A display unit, comprising

a plurality of display function layers provided in a stacking direction, and

a pixel circuit group includes a number of the pixel circuits,

wherein the plurality of display function layers includes a first display function layer and a second display function layer, the first display function layer being provided on a display surface side, and the second display function layer being provided on a side opposite to the display surface side,

wherein the first display function layer includes a first light emitting layer that emits light of a color, and the second display function layer includes a second light emitting layer that emits light of a complementary color of the color,

wherein the first display function layer further includes

a first transistor layer,

a first anode provided between the first light emitting layer and the first transistor layer, and

a first cathode disposed on a side, of the first light emitting layer, opposite to the first transistor layer, and

the second display function layer further includes

a second transistor layer,

a second anode provided between the second light emitting layer and the second transistor layer, and

a second cathode provided on a side, of the second light emitting layer, opposite to the second transistor layer,

wherein the first transistor layer is provided on the display surface side of the first light emitting layer in the first display function layer, and the second transistor layer is provided on a side opposite to the display surface side of the second light emitting layer in the second display function layer, and

wherein at least one of the first cathode and the second cathode includes a plurality of projecting portions each projecting from one of the first cathode and the second cathode to the other of the first cathode and the second cathode.

13. The display unit according to claim 12, wherein the first cathode and the second cathode are in contact with each other by the projecting portions.

14. The display unit according to claim 12, wherein the projecting portions are provided to partially enclose a first light emitting region corresponding to each of the first anodes, or enclose a second light emitting region corresponding to each of the second anodes.

15. A display unit, comprising

a plurality of display function layers provided in a stacking direction, and

a pixel circuit group includes a number of the pixel circuits,

wherein the plurality of display function layers includes a first display function layer and a second display function layer, the first display function layer being provided on a display surface side, and the second display function layer being provided on a side opposite to the display surface side,

wherein the first display function layer includes a first light emitting layer that emits light of a color, and the second display function layer includes a second light emitting layer that emits light of a complementary color of the color,

wherein the first display function layer further includes

a first transistor layer,

a first anode provided between the first light emitting layer and the first transistor layer, and

a first cathode disposed on a side, of the first light emitting layer, opposite to the first transistor layer, and

the second display function layer further includes

a second transistor layer,

a second anode provided between the second light emitting layer and the second transistor layer, and

a second cathode provided on a side, of the second light emitting layer, opposite to the second transistor layer,

wherein the first transistor layer is provided on the display surface side of the first light emitting layer in the first display function layer, and the second transistor layer is provided on a side opposite to the display surface side of the second light emitting layer in the second display function layer, and

wherein one of the first cathode and the second cathode includes a plurality of projecting portions each projecting to the other of the first cathode and the second cathode, and the other of the first cathode and the second cathode includes a plurality of depression portions fitted with the respective projecting portions.