Bidirectional multispeed indexing control system
First Claim
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1. A bidirectional multispeed indexing control system for a display unit which has an increment input and a decrement input so as to be controllable to sequentially index through an ordered list of discrete elements, the control system comprising:
- a first operator actuatable switch;
a second operator actuatable switch; and
a display control unit responsive to operator actuation of the first and second switches and effective to provide signals to the increment and decrement inputs of the display unit so as to control the display unit to index through the ordered list in a respective direction according to which of the first and second switches is actuated first and at a speed determined by whether the other of the first and second switches is also actuated.
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Abstract
A bidirectional multispeed indexing control system for a display unit which has an increment input and a decrement input so as to be controllable to sequentially index through an ordered list of discrete elements. The control system has a two-button user interface. The user presses one button to increment once, and holds that button to continuously index at a slow fixed speed. To increase the indexing speed, the user presses the second button while continuing to hold the first button. Indexing speed will continue to increase until either a maximum speed is reached or the user releases the second button, at which point the indexing speed decreases from the value reached while holding the second button. To stop indexing, both buttons are released. To increment in the opposite direction (i.e., decrement), the order in which the buttons are pressed is reversed.
62 Citations
14 Claims
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1. A bidirectional multispeed indexing control system for a display unit which has an increment input and a decrement input so as to be controllable to sequentially index through an ordered list of discrete elements, the control system comprising:
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a first operator actuatable switch;
a second operator actuatable switch; and
a display control unit responsive to operator actuation of the first and second switches and effective to provide signals to the increment and decrement inputs of the display unit so as to control the display unit to index through the ordered list in a respective direction according to which of the first and second switches is actuated first and at a speed determined by whether the other of the first and second switches is also actuated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
a clock circuit providing a train of clock pulses;
a counter receiving said clock pulses and responsive to actuation of both said first and second switches to count said clock pulses and provide an output indicative of the count up to a predetermined limit;
a digital to analog converter receiving said counter output and effective to provide a voltage output corresponding to said counter output; and
a voltage controlled oscillator receiving said voltage output and effective to provide a train of output pulses at a rate corresponding to said voltage output;
wherein said train of output pulses is utilized by the display control unit to generate increment and decrement signals for application to said display unit increment and decrement inputs.
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6. The control system according to claim 1 wherein the display control unit includes:
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a clock circuit providing a train of clock pulses;
a counter receiving said clock pulses and responsive to continuous actuation of at least one of said first and second switches to count said clock pulses and provide an output indicative of said count; and
a decoder receiving said counter output and effective in response to said counter output reaching a predetermined value to generate an output signal;
wherein the display control unit responds to said output signal to provide a train of pulses used to generate increment and decrement signals for application to said display unit increment and decrement inputs.
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7. The control system according to claim 1 wherein the display control unit includes:
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a first clock circuit providing a train of first clock pulses;
a first counter receiving said first clock pulses and responsive to continuous actuation of at least one of said first and second switches to count said first clock pulses and provide a first count output indicative of the first clock pulse count;
a decoder receiving said first count output and effective in response to said first count output reaching a predetermined value to generate a decoder output signal;
a second clock circuit providing a train of second clock pulses;
a second counter receiving said second clock pulses and responsive to actuation of both said first and second switches and said decoder output signal to count said second clock pulses and provide a second count output indicative of the second clock count up to a predetermined maximum limit;
a digital to analog converter receiving said second count output and effective to provide a voltage output corresponding to said second count output; and
a voltage controlled oscillator receiving said voltage output and effective to provide a train of output pulses at a rate equal to a predetermined minimum rate plus a rate corresponding to said voltage output;
wherein said train of output pulses is utilized by the display control unit to generate increment and decrement signals for application to said display unit increment and decrement inputs;
whereby when a single switch is continuously actuated the increment or decrement signals are generated at a fixed minimum rate and when both switches are continuously actuated the increment or decrement signals are generated at a rate which increases from the fixed minimum rate to a predetermined maximum rate.
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8. The control system according to claim 7 wherein the second counter is arranged so that when the other of the first and second switches is no longer actuated after both switches had been actuated the second clock pulses are utilized to decrement the second count output.
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9. A method for providing bidirectional multispeed indexing control for a display unit having increment and decrement inputs so as to be controllable to sequentially index through an ordered list of discrete elements in response to selective actuation of first and second operator actuatable devices, comprising the steps of:
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responding to actuation of one of the devices for providing signals to a respective one of the increment and decrement inputs so as to control the display unit to index through the ordered list in a respective direction corresponding to which of the devices is actuated first; and
controlling the indexing speed of the display unit in accordance with whether the other of the devices is also actuated. - View Dependent Claims (10, 11, 12)
increasing the indexing speed of the display unit in response to continued actuation of the other of the devices.
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11. The method according to claim 10 further comprising the step of:
decreasing the indexing speed of the display unit in response to subsequent deactuation of the other of the devices.
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12. The method according to claim 9 further comprising the steps of:
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responding to continued actuation of the other of the devices for increasing the indexing speed of the display unit up to a predetermined limit; and
maintaining the indexing speed of the display unit at the predetermined limit while both of the devices are actuated.
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13. A bidirectional multispeed indexing control system operative to selectively provide output pulses on first and second output leads, the control system comprising:
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a first operator actuatable switch;
a second operator actuatable switch; and
a control unit responsive to operator actuation of the first and second switches and effective to provide output pulses on one of the first and second output leads according to which of the first and second switches is actuated first and at a pulse rate determined by whether the other of the first and second switches is also actuated.
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14. A method for providing bidirectional multispeed indexing pulses on first and second output leads in response to selective actuation of first and second operator actuatable devices, comprising the steps of:
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responding to actuation of one of the devices for providing pulses to a respective one of the output leads corresponding to which of the devices is actuated first; and
controlling the pulse rate of the indexing pulses in accordance with whether the other of the devices is also actuated.
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Specification
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Current AssigneeLucent Technologies, Inc. (Nokia Corporation)
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Original AssigneeLucent Technologies, Inc. (Nokia Corporation)
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InventorsCotis, Joseph F.
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Primary Examiner(s)Hjerpe, Richard
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Assistant Examiner(s)LESPERANCE, JEAN E
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Application NumberUS09/528,561Time in Patent Office785 DaysField of Search345/33, 345/34, 345/46, 368/30, 368/82, 368/83, 368/84, 368/241, 368/242US Class Current345/33CPC Class CodesG04G 5/02 by temporarily changing the...G06F 3/0489 using dedicated keyboard ke...
