SENSING DEVICE, DISPLAY DEVICE, ELECTRONIC APPARATUS, AND SENSING METHOD
First Claim
1. A sensing device comprising:
- a plurality of sensors that are arrayed on a screen and that generate first detection signals each having a level corresponding to a touch state of an object on the screen or a distance between the object and the screen;
a read unit that reads the first detection signals from the plurality of sensors at predetermined periods;
a binarization unit that compares a level of each of the first detection signals read by the read unit with a threshold value and generates a second detection signal that is binarized;
a determination unit that determines whether or not the object touches the screen on the basis of each second detection signal;
a detection unit that detects a touch position of the object on the screen on the basis of each second detection signal; and
a control unit that controls the read unit such that the predetermined period becomes a first period when the determination unit determines that there is no touch and that controls the read unit such that the predetermined period becomes a second period shorter than the first period when the determination unit determines that there is a touch.
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Accused Products
Abstract
A sensing device includes: a plurality of sensors that are arrayed on a screen and that generate first detection signals each having a level corresponding to a touch state of an object on the screen or a distance between the object and the screen; a read unit that reads the first detection signals from the plurality of sensors at predetermined periods; a binarization unit that compares a level of each of the first detection signals read by the read unit with a threshold value and generates a second detection signal that is binarized; a determination unit that determines whether or not the object touches the screen on the basis of each second detection signal; a detection unit that detects a touch position of the object on the screen on the basis of each second detection signal; and a control unit that controls the read unit such that the predetermined period becomes a first period when the determination unit determines that there is no touch and that controls the read unit such that the predetermined period becomes a second period shorter than the first period when the determination unit determines that there is a touch.
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Citations
16 Claims
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1. A sensing device comprising:
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a plurality of sensors that are arrayed on a screen and that generate first detection signals each having a level corresponding to a touch state of an object on the screen or a distance between the object and the screen; a read unit that reads the first detection signals from the plurality of sensors at predetermined periods; a binarization unit that compares a level of each of the first detection signals read by the read unit with a threshold value and generates a second detection signal that is binarized; a determination unit that determines whether or not the object touches the screen on the basis of each second detection signal; a detection unit that detects a touch position of the object on the screen on the basis of each second detection signal; and a control unit that controls the read unit such that the predetermined period becomes a first period when the determination unit determines that there is no touch and that controls the read unit such that the predetermined period becomes a second period shorter than the first period when the determination unit determines that there is a touch. - View Dependent Claims (2, 3, 4, 5, 14, 15, 16)
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6. A sensing device that detects a touch position of an object on a screen, comprising:
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a plurality of sensors that are arrayed on the screen and that generate first detection signals each having a level corresponding to an amount of incident light, a read unit that is operable in a normal mode, in which the first detection signals are read from the plurality of sensors at first periods, and a low consumption mode, in which the first detection signals are read from the plurality of sensors at second periods longer than the first period; a binarization unit that compares a level of each of the first detection signals read by the read unit with a threshold value and generates a second detection signal that is binarized; a sensing unit that senses that the object does not touch the screen on the basis of each second detection signal, a detection unit that detects the touch position of the object on the screen on the basis of each second detection signal; and a control unit that controls switching between the normal mode and the low consumption mode, controls the read unit to switch to the low consumption mode when the sensing unit senses that there is no touch continuously for a predetermined time in the normal mode, and controls the read unit to switch from the low consumption mode to the normal mode in a predetermined case. - View Dependent Claims (7, 8, 9, 13)
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10. A sensing device that detects a touch position of an object on a screen, comprising:
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‘
m×
n’
sensors that are arrayed on the screen corresponding to intersections between ‘
m’
(integer of 2 or more) scanning lines and ‘
n’
(integer of 2 or more) read lines and that generate first detection signals each having a level corresponding to an amount of incident light;a read unit that is operable in a normal read mode, in which the first detection signals are read from the ‘
m×
n’
sensors, and a partial read mode, in which the first detection signals are read from the ‘
M×
N’
(smaller than ‘
m×
n’
) sensors corresponding to the ‘
M’
(integer of 2 or more and ‘
m’
or less) scanning lines continuously arrayed and the ‘
N’
(integer of 2 or more and ‘
n’
or less) read lines continuously arrayed;a binarization unit that compares a level of each of the first detection signals read by the read unit with a threshold value and generates a second detection signal that is binarized; a sensing unit that senses that the object does not touch the screen on the basis of each second detection signal; a detection unit that detects the touch position of the object on the screen on the basis of each second detection signal; and a control unit that controls switching between the normal read mode and the partial read mode, controls the read unit to switch to the partial read mode when the sensing unit senses that there is no touch continuously for a predetermined time in the normal read mode, and controls the read unit to switch from the partial read mode to the normal read mode in a predetermined case. - View Dependent Claims (11, 12)
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Specification