# US 2019/0172389 A1 · Electroluminescent display panel and electronic apparatus

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- Number: US 2019/0172389 A1
- Document ID: US20190172389A1
- Status: Published application
- Kind: A1
- Application number: 16/253,092
- Filed: 2019-01-21
- Published: 2019-06-06
- Earliest claimed: 2008-01-21
- Assignees: Sony Corporation
- Applicants: Sony Corporation
- Inventors: Junichi Yamashita; Tetsuro Yamamoto; Katsuhide Uchino
- Web page: https://patentgrep.com/patent/US20190172389A1

## CPC

- G09G 3/3225: using an active matrix
- G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element
- G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element
- H10K 59/126: Shielding, e.g. light-blocking means over the TFTs
- G09G 2300/0417: Special arrangements specific to the use of low carrier mobility technology
- G09G 2300/0426: Layout of electrodes and connections
- G09G 2300/043: Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver
- G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing
- G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor
- G09G 2300/0852: being a dynamic memory with more than one capacitor
- G09G 2330/028: Generation of voltages supplied to electrode drivers in a matrix display other than LCD
- G09G 2330/04: Display protection
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

An electroluminescent display panel has pixel circuits for an active matrix driving system. At least one of the pixel circuits has a thin-film transistor in which a portion of a pattern of a metal wiring material above a channel layer of the thin-film transistor is disposed to shield the channel region of the thin-film transistor.

## Claims

### Claim 1

A display panel comprising;
(i) a substrate,
(ii) a stacked structure disposed on the substrate, the stacked structure including, in this order:
(ii-a) a first molybdenum layer,
(ii-b) a first insulating layer,
(ii-c) a polysilicon layer to form a source/drain region and a channel region of the sampling transistor,
(ii-d) a second insulating layer,
(ii-e) a second molybdenum layer electrically connected directly to the first molybdenum layer to form a gate electrode of the sampling transistor, and
(ii-f) a third insulating layer,
(iii) a light-emitting element disposed on the stacked structure, the light-emitting element including:
(iii-a) a metallic anode electrode disposed on the third insulating layer,
(iii-b) an organic layer disposed on the metallic anode electrode, and
(iii-c) a transparent cathode electrode disposed on the organic layer,
wherein a gate electrode of a driving transistor is electrically connected to the polysilicon layer and a first electrode of a storage capacitor, and
a second electrode of the storage capacitor is electrically connected directly to the metallic anode electrode and is electrically connected directly to a source/drain region of the driving transistor.

### Claim 2 (depends on 1)

The display panel according to claim 1, wherein the second molybdenum layer is a light shielding layer.