Backlight module with integrated pressure sensor
First Claim
1. A smartphone comprising:
- a first cover layer;
an LCD panel located under the first cover layer and comprising a liquid crystal layer, a first glass layer, and a second glass layer, the liquid crystal layer located between the first glass layer and the second glass layer;
a backlight unit located under the LCD panel and comprising an optical film, a light source, a reflective sheet, and a second cover layer; and
a touch sensor which senses touch in a capacitive manner;
wherein the backlight unit further comprises a pressure sensor and a spacer layer, the pressure sensor comprising a plurality of electrodes formed in a single layer attached on the second cover layer and spaced apart from the reflective sheet, the pressure sensor located between the reflective sheet and the second cover layer;
wherein a driving signal is applied to the touch sensor and a touch position is detected by a sensing signal output from the touch sensor;
wherein a magnitude of a touch pressure is detected based on a change amount of capacitance that is output from the pressure sensor and that is changed according to a distance between the pressure sensor and an electrode located within the LCD panel, wherein the electrode in the LCD panel functions as a noise blocking layer for the LCD panel or the electrode located within the LCD panel is a common electrode within the LCD panel;
wherein the LCD panel is bent according to the touch; and
wherein the change amount of the capacitance output from the pressure sensor changes as the LCD panel bends.
1 Assignment
0 Petitions
Accused Products
Abstract
In one embodiment, a smartphone includes a first cover layer; an LCD panel located under the first cover layer; a backlight unit located under the LCD panel and comprising a reflective sheet and a second cover layer; and a capacitive touch sensor; wherein the backlight unit further comprises a pressure sensor and a spacer layer, the pressure sensor comprising electrodes attached on the second cover layer and spaced apart from the reflective sheet; wherein a touch position is detected by a sensing signal output from the touch sensor; wherein a magnitude of a touch pressure is detected based on a change amount of capacitance that is changed according to a distance between the pressure sensor and an electrode located within the LCD panel; wherein the LCD panel is bent according to the touch; and wherein the capacitance change amount changes as the LCD panel bends.
47 Citations
15 Claims
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1. A smartphone comprising:
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a first cover layer; an LCD panel located under the first cover layer and comprising a liquid crystal layer, a first glass layer, and a second glass layer, the liquid crystal layer located between the first glass layer and the second glass layer; a backlight unit located under the LCD panel and comprising an optical film, a light source, a reflective sheet, and a second cover layer; and a touch sensor which senses touch in a capacitive manner; wherein the backlight unit further comprises a pressure sensor and a spacer layer, the pressure sensor comprising a plurality of electrodes formed in a single layer attached on the second cover layer and spaced apart from the reflective sheet, the pressure sensor located between the reflective sheet and the second cover layer; wherein a driving signal is applied to the touch sensor and a touch position is detected by a sensing signal output from the touch sensor; wherein a magnitude of a touch pressure is detected based on a change amount of capacitance that is output from the pressure sensor and that is changed according to a distance between the pressure sensor and an electrode located within the LCD panel, wherein the electrode in the LCD panel functions as a noise blocking layer for the LCD panel or the electrode located within the LCD panel is a common electrode within the LCD panel; wherein the LCD panel is bent according to the touch; and wherein the change amount of the capacitance output from the pressure sensor changes as the LCD panel bends. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A smartphone comprising:
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a first cover layer; an LCD panel located under the first cover layer and comprising a liquid crystal layer, a first glass layer, and a second glass layer, the liquid crystal layer located between the first glass layer and the second glass layer; a backlight unit located under the LCD panel and comprising an optical film, a light source, a reflective sheet, and a second cover layer; and a touch sensor which senses touch in a capacitive manner; wherein the backlight unit further comprises a pressure sensor and a spacer layer, the pressure sensor comprising a plurality of electrodes formed in a single layer attached on the second cover layer and spaced apart from the reflective sheet, the pressure sensor located between the reflective sheet and the second cover layer; wherein a driving signal is applied to the touch sensor and a touch position is detected by a sensing signal output from the touch sensor; wherein a magnitude of a touch pressure is detected based on a change amount of capacitance that is output from the pressure sensor and that is changed according to a distance between the pressure sensor and an electrode located within the LCD panel, wherein the electrode in the LCD panel functions as a noise blocking layer for the LCD panel; wherein the LCD panel is bent according to the touch; and wherein the change amount of the capacitance output from the pressure sensor changes as the LCD panel bends.
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Specification