Touch screen for mobile telephone
First Claim
Patent Images
1. A touch screen for a mobile telephone, comprising:
- a display unit on which a plurality of keypad characters are displayed;
a number of light pulse emitting units;
a number of light pulse receiving units,wherein said light pulse emitting units send light pulses over said display unit, and said light pulse receiving units receive said light pulses; and
a calculating unit to disambiguate an intended one of the plurality of keypad characters, based on a pattern of light pulses emitted by the emitting units that are shadowed by a pointer, as determined from outputs of the receiving units, wherein the pattern of shadowed light pulses substantially completely covers more than one displayed keypad character, by determining which of the displayed keypad characters are substantially completely shadow-covered, and by selecting an appropriate one of the substantially completely shadow-covered displayed keypad characters.
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Accused Products
Abstract
A touch screen arrangement fitted to a mobile telephone apparatus and built-on or resting on a substrate. The touch screen includes a display unit and a number of light pulse emitting units and a number of light pulse receiving units, said units being edge-related to said display unit. The light pulse emitting units and the light pulse receiving units are orientated adjacent said display unit, with the directions of said emitted and received light pulses being at right angles, or at least generally at right angles, to a planar surface on the display unit. The touch screen also includes four light pulse deflecting devices positioned close to the display surface.
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Citations
18 Claims
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1. A touch screen for a mobile telephone, comprising:
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a display unit on which a plurality of keypad characters are displayed; a number of light pulse emitting units; a number of light pulse receiving units, wherein said light pulse emitting units send light pulses over said display unit, and said light pulse receiving units receive said light pulses; and a calculating unit to disambiguate an intended one of the plurality of keypad characters, based on a pattern of light pulses emitted by the emitting units that are shadowed by a pointer, as determined from outputs of the receiving units, wherein the pattern of shadowed light pulses substantially completely covers more than one displayed keypad character, by determining which of the displayed keypad characters are substantially completely shadow-covered, and by selecting an appropriate one of the substantially completely shadow-covered displayed keypad characters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A touch screen for a mobile telephone, comprising:
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a display unit on which a plurality of keypad characters are displayed; a number of light pulse emitting units; a number of light pulse receiving units, characterised in that the light pulse emitting units and light pulse receiving units are orientated adjacent said display unit such as to send and receive the light pulses in directions perpendicular to, or at least generally perpendicular to, a planar surface on the display unit; mutually opposing light pulse deflecting devices placed close to the display unit, wherein said light deflecting devices transmit light pulses through cover related sections; and a calculating unit configured to disambiguate an intended one of the plurality of keypad characters, based on a pattern of light pulses shadowed by a pointer, as determined from outputs of the receiving units, wherein the pattern of shadowed light pulses substantially completely covers more than one displayed keypad character, by determining which of the displayed keypad characters are substantially completely shadow-covered, and by selecting an appropriate one of the substantially completely shadow-covered displayed keypad characters. - View Dependent Claims (15, 16, 17, 18)
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Specification