Optical touchscreen and electronic device using same
AssigneesFu Tai Hua Industry (Shenzhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
InventorQiang You
Life of this patent
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Abstract
A touchscreen for an electronic device includes a first substrate, a second substrate opposite to the first substrate, and photosensors disposed on the first substrate. The second substrate includes a first surface and a second surface opposite to the first surface. When a first light at a first wavelength enters the second substrate via the second surface, the second substrate emits the first light at the first wavelength from the first surface. The second substrate further totally reflects the first light at a second wavelength. The plurality of photosensors detect the first light at the first wavelength penetrating through the second substrate, and output corresponding detecting signals.
Claims18
A touchscreen, comprising:
- a first substrate;
- a second substrate opposite to the first substrate, comprising:
- a first surface close and opposite to the first substrate;
- and
- a second surface opposite to the first surface;
- and
- a plurality of photosensors disposed on a surface of the first substrate close and opposite to the first surface of the second substrate;
- wherein the first surface and the second surface have different optical properties, the first surface serves as an incident surface to receive a first light completely penetrating through the second substrate to emit from the second surface;
- when the second surface receives a second light, a portion of the second light at a specific wavelength penetrates through the second substrate and is emitted from the first surface while the other portion of the second light at other wavelengths are totally reflected by the second surface, the plurality of photosensors detect the second light at the specific wavelength penetrating through the second substrate, and output corresponding detecting signals.
An electronic device, comprising:
- a display device;
- and
- a touchscreen, comprising:
- a first substrate close to the display device;
- a second substrate opposite to the first substrate, comprising:
- a first surface close and opposite to the first substrate, and
- a second surface opposite to the first surface;
- and
- a plurality of photosensors disposed on a surface of the first substrate close and opposite to the first surface of the second substrate;
- wherein the first surface and the second surface have different optical properties, the first surface serves as an incident surface to receive a first light completely penetrating through the second substrate to emit from the second surface;
- when the second surface receives a second light, a portion of the second light at a specific wavelength penetrates through the second substrate and is emitted from the first surface while the other portion of the second light at other wavelengths are totally reflected by the second surface, the plurality of photosensors detect the second light at the specific wavelength penetrating through the second substrate, and output corresponding detecting signals.
Dependencies are inferred from the claim text.