Sensor-equipped display device

• US 10,175,798 B2
• Filed: 01/19/2017
• Issued: 01/08/2019
• Est. Priority Date: 01/19/2016
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display Incorporated
• Inventors: Noguchi, Koji, Nakano, Yasushi, Murase, Masaki
• Primary Examiner(s): Patel, Sanjiv D.
• Application Number:
  US15/410,633
• Publication Number:
  US 20170205928A1
• Time in Patent Office: 719 Days
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: H05K 1/147 at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit H05K1/148 takes precedence
• CPC Class Codes: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence
• CPC Class Codes: H05K 3/361 Assembling flexible printed circuits with other printed circuits

Abstract

According to one embodiment, a sensor-equipped display device includes a first substrate includes a first electrode located in a display area in which an image is displayed, a second substrate includes a second electrode which is located in the display area, and outputs a sensor signal, and a flexible substrate includes a first connection portion connected to the first substrate and a second connection portion connected to the second substrate, the flexible substrate includes a common base layer extending between the first connection portion and the second connection portion.

Claims

1. A sensor-equipped display device comprising:

a first substrate comprising a first electrode located in a display area in which an image is displayed;

a second substrate comprising a second electrode which is located in the display area, and outputs a sensor signal; and

a flexible substrate comprising a first connection portion connected to the first substrate and a second connection portion connected to the second substrate, the flexible substrate comprising a common base layer extending between the first connection portion and the second connection portion,

wherein the flexible substrate further comprises a conductive layer and a cover layer,

the conductive layer is on the common base layer, is between the common base layer and the first substrate, and includes a first conductive layer and a second conductive layer,

the first conductive layer is connected to the first substrate in the first connection portion,

the second conductive layer extends from the second connection portion to the first connection portion,

the cover layer covers the second conductive layer, and includes an opening exposing the first conductive layer in the first connection portion,

the second conductive layer includes a portion located in the first connection portion and aligned with the first conductive layer in a first direction intersecting a second direction, and

the first conductive layer extends in the second direction.

2. The sensor-equipped display device of claim 1, further comprising a driving IC chip mounted on the first substrate, wherein

the flexible substrate does not overlap the driving IC chip in planar view between the first connection portion and the second connection portion.

3. The sensor-equipped display device of claim 1, further comprising a driving IC chip mounted on the first substrate, wherein

the flexible substrate overlaps the driving IC chip in planar view between the first connection portion and the second connection portion.

4. The sensor-equipped display device of claim 1, wherein the flexible substrate further comprises an auxiliary cover layer on the common base layer, the common base layer is between the auxiliary cover layer and the conductive layer, and the auxiliary cover layer is provided at a position which overlaps the opening of the cover layer.

5. The sensor-equipped display device of claim 4, wherein the auxiliary cover layer has a thickness equal to a thickness of the cover layer.

6. The sensor-equipped display device of claim 1, further comprising a conductive adhesive layer which is located at the opening, and connects the first conductive layer and the first substrate;

and

the conductive adhesive layer does not overlap the cover layer.

7. The sensor-equipped display device of claim 1, wherein the second electrode is located on the second substrate on an opposite side of a side opposed to the first substrate.

8. The sensor-equipped display device of claim 1, wherein:

the second substrate further comprises a second terminal which is located on a same surface as a surface on which the second electrode is located, and is electrically connected to the second electrode;

the flexible substrate further comprises a third conductive layer which is located on the common base layer, on a side opposed to the second substrate, and extends to the second connection portion; and

the third conductive layer is electrically connected to the second terminal.

9. The sensor-equipped display device of claim 1, wherein the first substrate comprises a first area opposed to the second substrate, a second area not opposed to the second substrate, and a first terminal located in the second area and electrically connected to the first connection portion.

10. The sensor-equipped display device of claim 8, wherein the third conductive layer extends to the first connection portion, and is electrically connected to the first terminal.

11. The sensor-equipped display device of claim 1, further comprising a driving IC chip mounted on the first substrate, wherein

in the driving IC chip, a detection circuit which reads the sensor signal output from the second electrode is incorporated.

12. The sensor-equipped display device of claim 8, wherein the third conductive layer extends to a position different from the first connection portion, and is separated from the first substrate.

13. The sensor-equipped display device of claim 1, wherein the first electrode and the second electrode cross each other in planar view.

14. The sensor-equipped display device of claim 1, wherein:

in the first connection portion, a portion of the cover layer and the opening are arranged in the first direction.

15. The sensor-equipped display device of claim 1, wherein the cover layer includes a second opening exposing the second conductive layer in the second connection portion, and

the second conductive layer is connected to the second substrate in an area overlapping the second opening.

16. The sensor-equipped display device of claim 1, further comprising a conductive adhesive layer which is located at the opening, and connects the first conductive layer and the first substrate, wherein

the cover layer is adhered to the first substrate via the conductive adhesive layer.

17. A sensor-equipped display device comprising:

a first substrate;

a second substrate comprising a second terminal configured to output a sensor signal; and

a flexible substrate comprising a first connection portion connected to the first substrate and a second connection portion connected to the second substrate, the flexible substrate comprising a common base layer extending between the first connection portion and the second connection portion,

wherein the flexible substrate further comprises a conductive layer and a cover layer,

the conductive layer is on the common base layer, and is between the common base layer and the first substrate, and includes a first conductive layer and a second conductive layer,

the first conductive layer is connected to the first substrate in the first connection portion,

the second conductive layer extends from the second connection portion to the first connection portion,

the cover layer covers the second conductive layer, and includes an opening exposing the first conductive layer in the first connection portion,

the second conductive layer includes a portion located in the first connection portion and aligned with the first conductive layer in a first direction intersecting a second direction, and

the first conductive layer extends in the second direction.

18. The sensor-equipped display device of claim 17, wherein the cover layer includes a second opening exposing the second conductive layer in the second connection portion, and

the second conductive layer is connected to the second substrate in an area overlapping the second opening.

19. The sensor-equipped display device of claim 17, further comprising a conductive adhesive layer which is located at the opening, and connects the first conductive layer and the first substrate, wherein

the cover layer is adhered to the first substrate via the conductive adhesive layer.