Touch sensor and display device having the same
AssigneeSamsung Display Co., Ltd.
InventorsJong Ho Hong, Mu Gyeom Kim, Won Sang Park, Young Seok Seo, Won Ki Hong
Life of this patent
Estimating the term…
Abstract
A touch sensor may include a base substrate, a sensing unit including a first electrode and a second electrode provided on a same layer of the base substrate and not overlapping with each other, wherein a capacitance of the sensing unit is changed by a user's touch, and a cushion layer disposed on at least one surface of the sensing unit and configured to have a permittivity change in response to a pressure of the user's touch, wherein the cushion layer may include an insulator and conductive particles and the insulator may include an elastic material elastically deformed by the pressure of the user's touch.
Claims31
A touch sensor, comprising:
- a base substrate;
- a sensing unit comprising a first electrode and a second electrode provided on a same layer of the base substrate and not overlapping with each other, wherein a capacitance of the sensing unit is changed by a user's touch;
- and
- a cushion layer disposed on at least one surface of the sensing unit and configured to have a permittivity change in response to a pressure of the user's touch,
- wherein the cushion layer comprises an insulator and conductive particles, and
- the insulator comprises an elastic material elastically deformed by the pressure of the user's touch.
A touch sensor, comprising:
- a base substrate;
- a sensing unit comprising a first electrode and a second electrode provided on a same layer of the base substrate and not overlapping with each other, wherein a capacitance of the sensing unit is changed by a user's touch;
- and
- a cushion layer disposed on at least one surface of the sensing unit, wherein a permittivity of the cushion layer is configured to change depending on a pressure of the user's touch,
- wherein the cushion layer comprises a base layer having a first permittivity and
- a cavity distributed in the base layer having a second permittivity which is different from the first permittivity.
A display device, comprising:
- a display panel having a front surface on which an image is displayed;
- and
- a touch sensor provided on at least one surface of the display panel and detecting a touch position and a touch pressure,
- wherein the touch sensor comprises:
- a sensing unit comprising a first electrode and a second electrode provided on a same layer and not overlapping with each other, wherein a capacitance of the sensing unit is changed by a touch made by a user;
- and
- a cushion layer disposed on at least one surface of the sensing unit, wherein a permittivity of the cushion layer is configured to change in response to a pressure of the user's touch,
- wherein the cushion layer comprises an insulator and conductive particles and the insulator comprises an elastic material elastically deformed by the touch pressure.
A display device, comprising:
- a display panel having a front surface on which an image is displayed;
- and
- a touch sensor provided under the display panel and detecting a touch position and a touch pressure,
- wherein the touch sensor comprises:
- a sensing unit including a first electrode and a second electrode provided on a same layer and not overlapping with each other, wherein a capacitance of the sensing unit is changed by a user's touch;
- and
- a cushion layer disposed on at least one surface of the sensing unit, wherein a permittivity of the cushion layer is configured to change in response to a pressure of the user's touch,
- wherein the cushion layer comprises a first surface on which the sensing unit is provided and a second surface opposite to the first surface, and the first surface of the cushion layer and a lower portion of the display panel face each other.
Dependencies are inferred from the claim text.