Input Device
First Claim
1. An input device, comprising:
- an optical module, comprising;
a light guide plate, having a top surface, a bottom surface opposite the top surface, and a side;
a light source, being disposed adjacent to the side of the light guide plate to emit a light to the side, the light traveling within the light guide plate;
a scattering layer, being formed on the bottom surface and being configured to change a reflection path of parts of the light on the bottom surface so that the light is projected out of the top surface by the scattering layer to form a penetrating light; and
a sensor, having a viewing angle covering at least a part of the bottom surface of the light guide plate, wherein when an object approaches or touches the top surface of the light guide plate, at least a part of the penetrating light is reflected by the object to form a reflected light passing through the light guide plate and then being received by the sensor, and the input device generates a position signal according to the reflected light, the position signal indicating at least one relative position of the object with respect to the top surface of the light guide plate.
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Accused Products
Abstract
An input device comprising an optical module having a light guide plate, a light source, a scattering layer and a sensor is provided. The light guide plate has a top surface, a bottom surface, and a side. The light source emits a light to the side. The light travels within the light guide plate. The scattering layer changes a path of parts of the light on the bottom surface so that the light is projected out of the top surface to form a penetrating light. When an object approaches or touches the top surface of the light guide plate, at least a part of the penetrating light is reflected by the object to form a reflected light received by the sensor. According to the reflected light, the input device generates a position signal indicating at least one relative position of the object with respect to the top surface.
25 Citations
15 Claims
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1. An input device, comprising:
an optical module, comprising; a light guide plate, having a top surface, a bottom surface opposite the top surface, and a side; a light source, being disposed adjacent to the side of the light guide plate to emit a light to the side, the light traveling within the light guide plate; a scattering layer, being formed on the bottom surface and being configured to change a reflection path of parts of the light on the bottom surface so that the light is projected out of the top surface by the scattering layer to form a penetrating light; and a sensor, having a viewing angle covering at least a part of the bottom surface of the light guide plate, wherein when an object approaches or touches the top surface of the light guide plate, at least a part of the penetrating light is reflected by the object to form a reflected light passing through the light guide plate and then being received by the sensor, and the input device generates a position signal according to the reflected light, the position signal indicating at least one relative position of the object with respect to the top surface of the light guide plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
Specification