Touch display apparatus with light guide plate using infrared light for touch detection
US12159009B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2022 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Apr 5, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04109
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A touch display apparatus is provided. The touch display apparatus includes a display panel including a display surface, a light guide plate disposed over the display surface of the display panel and formed to emit light incident into one side surface of the light guide plate through an upper surface of the light guide plate, a first light source array disposed on one side of the light guide plate and including a plurality of infrared light sources configured to emit infrared rays to an one side surface of the light guide plate, a camera disposed on at least one side of the first light source array and configured to photograph infrared rays emitted through an entire area of the upper surface of the light guide plate, and a processor configured to recognize coordinates of an input object adjacent to the upper surface of the light guide plate using infrared rays images captured by the camera.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.