Backlight module with integrated pressure sensor
US10234984B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2016 |
| Grant date | Mar 19, 2019 |
| Priority date | — |
| Expiry date | Oct 18, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/0426
- WIPO fieldOptics
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.