Active matrix display

• US 20020190924A1
• Filed: 01/18/2002
• Published: 12/19/2002
• Est. Priority Date: 01/19/2001
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Yamada, Jiro, Hirano, Takashi, Asano, Mitsuru, Mori, Takao
• Granted Patent: US 7,432,885 B2
• Time in Patent Office: Days
• US Class Current: 345/55
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: H10K 50/824 combined with auxiliary electrodes
• CPC Class Codes: H10K 59/123 Connection of the pixel electrodes to the thin film transistors [TFT]
• CPC Class Codes: H10K 59/353 characterised by the geometrical arrangement of the RGB subpixels
• CPC Class Codes: H10K 59/80522 combined with auxiliary electrodes

Abstract

An active matrix display comprises a circuitry layer and a device layer having a planarizing layer therebetween on the glass substrate. The circuitry layer has pixel circuits defining pixel units and the device layer has organic EL devices defining the pixel units. The organic EL devices are electrically connected with respective pixel circuits by contacts. The contacts are each positioned at the exterior of the emitting area, or the luminescent layer including an organic layer, of each pixel unit in the device layer.

Claims

1. An active matrix display comprising:

a substrate;

a device layer overlying the substrate, comprising luminescent devices defining pixel units arrayed in a matrix;

a circuitry layer overlying the substrate, comprising pixel circuits for driving the respective luminescent devices, the pixel circuits defining the pixel units; and

contacts, each positioned at the exterior of the emitting area of each pixel unit in the device layer and electrically connecting the corresponding luminescent device with the corresponding pixel circuit.

2. An active matrix display according to claim 1, wherein the contacts are arrayed in a single dimension for each row or column in the matrix.

3. An active matrix display according to claim 2, wherein the contacts for the pixel units belonging to two adjacent rows or columns in the matrix are arrayed in a single dimension between the two adjacent rows or columns.

4. An active matrix display according to claim 1, wherein the luminescent devices are organic electroluminescence devices, each comprising a first electrode, a second electrode, and an organic layer including an luminescent layer and lying between the first electrode and the second electrode.

5. An active matrix display according to claim 1, wherein the pixel circuits each comprise a thin-film transistor.

6. An active matrix display comprising:

a substrate;

a device layer overlying the substrate, comprising luminescent devices defining pixel units, each luminescent device comprising a lower electrode, an upper electrode, and an organic layer including a luminescent layer and lying between the upper electrode and the lower electrode; and

a circuitry layer overlying the substrate, comprising pixel circuits for driving the respective luminescent devices, the pixel circuits defining the pixel units;

wherein each lower electrode has a contact electrically connecting the corresponding luminescent device with the corresponding pixel circuit, and the upper electrode does not overlie the contact.

7. An active matrix display according to claim 6, wherein the pixel circuits each comprise a thin-film transistor.