Optical touch display apparatus

摘要

An optical touch display apparatus including a backlight module, a display panel, and at least an optical detector is provided. The backlight module is capable of providing a visible beam and an invisible beam. The display panel is disposed at one side of the backlight module. A sensing space is located in front of the display panel, and the display panel is located between the backlight module and the sensing space. The visible beam and the invisible beam are capable of passing through the display panel and then being transmitted to the sensing space. The optical detector is disposed outside the display panel for sensing the invisible beam from the sensing space.

主权项

1. An optical touch display apparatus comprising:
a backlight module capable of providing a visible beam and an invisible beam; a display panel disposed at a side of the backlight module, wherein a sensing space is located in front of the display panel, the display panel is located between the backlight module and the sensing space, and the visible beam and the invisible beam are capable of passing through the display panel and being transmitted to the sensing space; at least one optical detector disposed outside the display panel, wherein a part of the invisible beam is reflected by the touch object when a touch object enters the sensing space, and the at least one optical detector being disposed in a transmission path of the part of the invisible beam reflected by the touch object to detect the part of the invisible beam, and wherein the part of the invisible beam transmitted to the at least one optical detector forms a bright region in a frame detected by the at least one optical detector, and the optical touch display apparatus is capable of determining a location of the touch object in the sensing space based on a location of the bright region in the frame, wherein the backlight module comprises at least one light emitting element and a light guide plate having a first surface facing the display panel, a second surface facing away from the display panel and the at least one light emitting element, and at least one light incident surface connecting the first surface and the second surface; and a front frame, covering an edge of the display panel, wherein the at least one optical detector is disposed near the display panel and covered by the front frame, wherein the at least one light emitting element is capable of emitting the visible beam and the invisible beam, wherein the visible beam and the invisible beam are capable of entering the light guide plate through the at least one light incident surface and being transmitted to the display panel through the first surface, and the at least one light emitting element comprises:
a visible light emitting diode chip capable of emitting the visible beam;an invisible light emitting diode chip capable of emitting the invisible beam; andan encapsulant encapsulating the visible light emitting diode chip and the invisible light emitting diode chip.