US 9,865,665 B2Granted

Semiconductor device, input/output device, and electronic appliance

AssigneeSemiconductor Energy Laboratory Co., Ltd.

InventorsShingo Eguchi, Shunpei Yamazaki

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Abstract

A flexible input/output device and an input/output device having high resistance to repeated bending are provided. The input/output device includes a first flexible substrate, a first insulating layer over the first substrate, a first transistor over the first insulating layer, a light-emitting element over and electrically connected to the first transistor and including an EL layer between first and second electrodes, a first bonding layer over the light-emitting element, a sensing element and a second transistor over the first bonding layer and electrically connected to each other, a second insulating layer over the sensing element and the second transistor, and a second flexible substrate over the second insulating layer. In the input/output device, B/A is greater than or equal to 0.7 and less than or equal to 1.7, where A is a thickness between the EL layer and the first insulating layer and B is a thickness between the EL layer and the second insulating layer.

Claims21

Dependent claims

An input/output device comprising:

a first substrate having flexibility;
a first insulating layer over the first substrate;
a first transistor over the first insulating layer;
a first conductive layer over the first insulating layer;
a light-emitting element that is over and electrically connected to the first transistor and comprises an EL layer containing a light-emitting organic compound between a first electrode and a second electrode;
a first bonding layer over the light-emitting element;
a sensing element and a second transistor that are over the first bonding layer and electrically connected to each other;
a second insulating layer over the sensing element and the second transistor;
and
a second substrate having flexibility over the second insulating layer,
wherein the light-emitting element emits light toward the second substrate,
wherein B/A is greater than or equal to 0.7 and less than or equal to 1.7, where A is a distance between the first insulating layer and the EL layer and B is a distance between the second insulating layer and the EL layer,
wherein the sensing element comprises a pair of electrodes, and
wherein one of the pair of electrodes and the first conductive layer are electrically connected to each other through a conductive connector.

11 more elements

An input/output device comprising:

a first substrate having flexibility;
a first insulating layer over the first substrate;
a display portion comprising:
a first transistor over the first insulating layer;
and
a light-emitting element that is over and electrically connected to the first transistor and comprises an EL layer containing a light-emitting organic compound between a first electrode and a second electrode;
a first bonding layer over the light-emitting element;
an input portion comprising a sensing element and a second transistor that are over the first bonding layer and electrically connected to each other;
a second insulating layer over the sensing element and the second transistor;
a second substrate having flexibility over the second insulating layer;
a first conductive layer that is over the first insulating layer and electrically connected to a first flexible printed circuit through a first connector provided in a first opening formed over the first conductive layer, wherein the first flexible printed circuit is configured to supply a first signal to the input portion;
and
a second conductive layer that is over the first insulating layer and electrically connected to a second flexible printed circuit through a second connector provided in a second opening formed over the second conductive layer, wherein the second flexible printed circuit is configured to supply a second signal to the display portion,
wherein the light-emitting element emits light toward the second substrate,
wherein B/A is greater than or equal to 0.7 and less than or equal to 1.7, where A is a distance between the first insulating layer and the EL layer and B is a distance between the second insulating layer and the EL layer,
wherein the sensing element comprises a pair of electrodes, and
wherein one of the pair of electrodes and the first conductive layer are electrically connected to each other through a conductive connector.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/700,527Filed 30 Apr 2015
Priority: JP 2014-0951162 May 2014
Published: US 2015/0317015 A15 Nov 2015
Granted: 9 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

G06F 3/0446
By capacitive means: using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
G06F 3/0443
By capacitive means: using a single layer of sensing electrodes
G06F 3/0447
By capacitive means: position sensing using the local deformation of sensor cells
G06F 3/047
Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means: using sets of wires, e.g. crossed wires