Projection type light-uniforming system for touch screen

Abstract

The invention discloses a projection type light-uniforming system for a touch screen, which comprises at least one infrared light source, at least one light guiding device, at least one optical module, at least one visible light source and at least one projection lens. The at least one infrared light source emits at least one infrared light; the at least one light guiding device is coupled to the infrared light source so as to guide the infrared light to the at least one optical module; the at least one optical module is connected with at least one imaging device, and the optical module receives the infrared light guided by the light guiding device and refracts the infrared light to the imaging device so as to form an infrared light image; the at least one visible light source is used for emitting at least one visible light, and the visible light is transmitted to the optical module and refracted to the imaging device to form a visible light image; and the at least one projection lens is used for receiving and refracting the visible light image and the infrared light image. The projection type light-uniforming system for the touch screen is a device which induces the infrared light source into a projector, in which the light can be uniformly projected on a projection screen by a projector system to thereby provide a uniform infrared light source for an optical touch system to use.

Description

technical field [0001] The present invention relates to the field of touch control systems, and more specifically, the present invention relates to a projective touch dodging system for optical touch control systems. Background technique [0002] There are quite a few types of touch panel technologies, and generally speaking, technology applications can be roughly divided according to the size of the application. In terms of small-size applications, such as personal digital assistants (PDAs) and mobile phones, most currently use resistive touch panels; emerging technology applications are projected capacitive touch panels driven by multi-touch smart phones. type touch panel. In terms of large size, infrared, surface acoustic wave or surface capacitance are traditionally used. The optical type is a relatively new technology, and it has considerable development potential in large-scale applications. In addition, panel makers are also actively developing in-cell touch panels...

AI Technical Summary

Problems solved by technology

As mentioned above, the cost of the infrared light-emitting diode module in the optical infrared touch panel is not low, and the illumination distribution of the light-emitting diode is a Gaussian distribution, and the uniformity of illumination is not good. In the infrared touch system of touch control, the uniformity of infrared light source illumination is very important

Images