US 2013/0075765 A1 · INFRARED LIGHT-EMITTING DIODE AND TOUCH SCREEN

Abstract

This invention discloses an infrared light-emitting diode. The infrared light-emitting diode comprises: only one core for emitting infrared light; a packaging body which at least comprises a first surface that is convex and in front of the core and a second surface that is plane and on one side of the core; and leads connected to the core and extending to outside of the packaging body; wherein the infrared light emitted by the core forms at least two beams of infrared light in different directions after being emitted from the packaging body through the first surface and the second surface. With such infrared LED and the touch screen, touch system and interactive display based on the LED, at least two beams of infrared light in different directions can be emitted requiring only one core.

Claims22

Dependent claims

An infrared light-emitting diode, characterized in that it comprises:

a core for emitting infrared light, number of the core being one;
a packaging body outside the core, the packaging body at least comprising a first surface and a second surface, the first surface being convex and in front of the core, and the second surface being plane and on one side of the core;
and
leads connected to the core and extending to outside of the packaging body;
wherein the infrared light emitted by the core forms at least two beams of infrared light in different directions after being emitted from the packaging body at least through the first surface and the second surface.

2 more elements

A touch screen, comprising an infrared light-emitting diode, an infrared receiving diode, a touch detecting area and a processing circuit, characterized in that the infrared light-emitting diode comprises:

a core for emitting an infrared light, number of the core being one;
a packaging body outside the core, the packaging body at least comprising a first surface and a second surface, the first surface being convex and in front of the core, and the second surface being plane and on one side of the core;
and
leads connected to the core and extending to outside of the packaging body;
wherein the infrared light emitted by the core forms at least two beams of infrared light in different directions after being emitted from the packaging body at least through the first surface and the second surface, and the at least two beams of infrared light in different directions are received by the infrared receiving diode after passing through the touch detecting area.

2 more elements

Dependencies are inferred from the claim text.

Infrared light-emitting diode and touch screen

Life of this patent

Infrared light-emitting diode and touch screen

Life of this patent

Abstract

Claims22