LIGHT-BASED TOUCH SCREEN WITH SHIFT-ALIGNED EMITTER AND RECEIVER LENSES
First Claim
1. A touch screen comprising:
- a housing;
a display mounted in said housing;
a plurality of collimating lenses mounted in said housing along two opposite edges of said display and arranged along the two edges so as to be shift-aligned relative to one another;
a plurality of light pulse emitters mounted in said housing that are spaced apart from and transmit light pulses through said collimating lenses of one of the two edges over said display;
a plurality of light pulse receivers mounted in said housing that are spaced apart from and receive the light pulses through said collimating lenses of the opposite of the two edges; and
a calculating unit, mounted in said housing and connected to said receivers, that determines a location of a pointer on said display that partially blocks the light pulses transmitted by said emitters, based on outputs of said receivers.
1 Assignment
0 Petitions
Accused Products
Abstract
A touch screen including a housing, a display mounted in the housing, a plurality of collimating lenses mounted in the housing along two opposite edges of the display and arranged along the two edges so as to be shift-aligned relative to one another, a plurality of light pulse emitters mounted in the housing that are spaced apart from and transmit light pulses through the collimating lenses of one of the two edges over the display, a plurality of light pulse receivers mounted in the housing that are spaced apart from and receive the light pulses through the collimating lenses of the opposite of the two edges, and a calculating unit, mounted in the housing and connected to the receivers, that determines a location of a pointer on the display that partially blocks the light pulses transmitted by the emitters, based on outputs of the receivers.
183 Citations
19 Claims
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1. A touch screen comprising:
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a housing; a display mounted in said housing; a plurality of collimating lenses mounted in said housing along two opposite edges of said display and arranged along the two edges so as to be shift-aligned relative to one another; a plurality of light pulse emitters mounted in said housing that are spaced apart from and transmit light pulses through said collimating lenses of one of the two edges over said display; a plurality of light pulse receivers mounted in said housing that are spaced apart from and receive the light pulses through said collimating lenses of the opposite of the two edges; and a calculating unit, mounted in said housing and connected to said receivers, that determines a location of a pointer on said display that partially blocks the light pulses transmitted by said emitters, based on outputs of said receivers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A touch screen comprising:
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a housing; a display mounted in said housing; two light guides mounted in said housing and arranged along two opposite edges of said display, each light guide comprising micro-lenses for refracting incoming light in multiple directions; a plurality of light pulse emitters mounted in said housing that transmit light pulses through a first one of said light guides over said display; a plurality of light pulse receivers mounted in said housing that receive light pulses through the other one of said light guides; and a calculating unit, mounted in said housing and connected to said receivers, to determine a location of a pointer on said display that partially blocks the light pulses refracted by said micro-lenses in the first light guide transmitted by said emitters, based on outputs of said receivers corresponding to light pulses refracted by said micro-lenses in said second light guide. - View Dependent Claims (19)
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Specification