Presentation supporting device
First Claim
1. A presentation supporting device comprising:
- first and second discrete accelerometers for individually detecting first and second accelerations of gravity resulting from inclinations in first and second sensitivity axis directions perpendicular to each other to output first and second acceleration signals; and
first and second discrete signal processors, individually associated with the first and second accelerometers, for processing input first and second acceleration signals to output cursor moving control signals for controlling moving speeds and moving directions in the first and second coordinate axis directions of a cursor on a computer display screen in response to voltage values and polarities of the first and second acceleration signals, wherein each of the first and second signal processors includes;
an amplifier circuit for amplifying the acceleration signal to output an amplified acceleration signal;
an absolute value circuit for converting the amplified acceleration signal to an absolute value having a voltage value of a positive polarity with respect to a predetermined first reference value to output an absolute value signal; and
a first threshold circuit for comparing the amplified acceleration signal with the first reference value to output a phase switch signal corresponding to the comparison result.
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Accused Products
Abstract
A presentation supporting device having excellent operability and adaptability to oral presentations in a computer multimedia environment. First and second accelerometers detect first and second acceleration of gravity resulting from inclinations in first and second sensitivity axis directions perpendicular to each other to output first and second acceleration signals, and first and second signal processors process the input first and second acceleration signals to output cursor moving control signals for controlling moving speeds and moving directions in the first and second coordinate axis directions of a cursor on a computer display screen in response to voltage values and polarities of the first and second acceleration signals.
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Citations
15 Claims
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1. A presentation supporting device comprising:
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first and second discrete accelerometers for individually detecting first and second accelerations of gravity resulting from inclinations in first and second sensitivity axis directions perpendicular to each other to output first and second acceleration signals; and first and second discrete signal processors, individually associated with the first and second accelerometers, for processing input first and second acceleration signals to output cursor moving control signals for controlling moving speeds and moving directions in the first and second coordinate axis directions of a cursor on a computer display screen in response to voltage values and polarities of the first and second acceleration signals, wherein each of the first and second signal processors includes; an amplifier circuit for amplifying the acceleration signal to output an amplified acceleration signal; an absolute value circuit for converting the amplified acceleration signal to an absolute value having a voltage value of a positive polarity with respect to a predetermined first reference value to output an absolute value signal; and a first threshold circuit for comparing the amplified acceleration signal with the first reference value to output a phase switch signal corresponding to the comparison result. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A presentation supporting device comprising:
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first and second discrete accelerometers for individually detecting first and second accelerations of gravity resulting from inclinations in first and second sensitivity axis directions perpendicular to each other to output first and second acceleration signals; and first and second discrete signal processors, individually associated with the first and second accelerometers, for processing input first and second acceleration signals to output cursor moving control signals for controlling moving speeds and moving directions in the first and second coordinate axis directions of a cursor on a computer display screen in response to voltage values and polarities of the first and second acceleration signals, wherein each of the first and second signal processors includes; an amplifier circuit for amplifying the acceleration signal to output an amplified acceleration signal; an absolute value circuit for converting the amplified acceleration signal to an absolute value having a voltage value of a positive polarity with respect to a predetermined first reference value to output an absolute value signal; a first threshold circuit for comparing the amplified acceleration signal with the first reference value to output a phase switch signal corresponding to the comparison result; a voltage frequency conversion circuit for converting the absolute value signal to a pulse signal of a frequency corresponding to the voltage value; an emulation waveform generator circuit for converting the pulse signal to first and second emulation waveforms as control signals for moving the cursor; and phase switch circuit for selecting either a first or second emulation waveform in response to the phase switch signal supplied to output the cursor moving control signal. - View Dependent Claims (9, 10, 11, 12)
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13. A presentation supporting device comprising:
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first and second accelerometers for detecting first and second accelerations and for out-putting first and second acceleration signals each having a voltage value; first and second signal processors, connected to said first and second accelerometers respectively, for processing input first and second acceleration signals to output cursor moving control signals; wherein at least one of said first and second signal processors includes a voltage to frequency conversion circuit for converting the acceleration signal voltage value to a pulse signal of a frequency corresponding to the voltage value, wherein said at least one of said first and second signal processors further includes an emulation waveform generator circuit for converting the pulse signal to first and second emulation waveforms as control signals for moving the cursor; and wherein said at least one of said first and second signal processors further includes a first threshold circuit for comparing the acceleration signal with a first reference value to output a phase switch signal corresponding to the comparison result. - View Dependent Claims (14, 15)
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Specification