Patent ID: 8913035

Claim:
An optical touch panel, comprising: a panel, having a touch area; a light guide module, disposed on the panel, and the light guide module comprising: a printed circuit board; at least one light emitting element, electrically disposed on the printed circuit board, wherein the light emitting element emits light rays; and a light guide strip, disposed on the printed circuit board, wrapping the light emitting element, and having a first surface, wherein the first surface is a light transmissive surface and the light rays are emitted out from the first surface, wherein the light guide strip further has a second surface and a third surface, the third surface is parallel to the first surface, and the second surface is connected between the first surface and the third surface, the light emitting element is a direct-light Light Emitting Diode (LED), an upper surface of each of the light emitting elements faces the second surface, and the upper surface is a light-proof surface, thereby masking the light rays emitted towards the second surface, the upper surface of each of the light emitting elements is a metal contact of the light emitting element, and wherein an area of the metal contact is approximately equal to an area of the upper surface, thereby masking the light rays emitted towards the second surface by the light emitting element; and a sensing element, disposed on the panel and located out of the touch area, wherein the sensing element is used for sensing an image formed when the light rays are projected onto an object.