Optical detecting device, display device, and electronic equipment
First Claim
Patent Images
1. An optical detecting device comprising:
- an emission unit that emits emitting light;
a light-receiving unit that receives the emitting light reflected off an object;
an amplifying unit that amplifies a received-light detection signal of the light-receiving unit;
a detecting unit that outputs position identifying information of the object based on an amplified signal output from the amplifying unit;
a determining unit that determines a position of the object based on the position identifying information; and
a coupling capacitor provided between an output node of the amplifying unit and an input node of the detecting unit,wherein the detecting unit outputs light-emitting current control information as the position identifying information, anda capacitance value of the coupling capacitor is set such that a fluctuation range of the light-emitting current control information becomes a predetermined fluctuation range.
2 Assignments
0 Petitions
Accused Products
Abstract
An optical detecting device including: an emission unit that emits emitting light; a light-receiving unit that receives the emitting light reflected off an object; an amplifying unit that amplifies a received-light detection signal of the light-receiving unit; a detecting unit that detects position identifying information of the object based on a signal output from the amplifying unit; a determining unit that determines a position of the object based on the position identifying information; and a coupling capacitor provided between an output node of the amplifying unit and an input node of the detecting unit.
21 Citations
20 Claims
-
1. An optical detecting device comprising:
-
an emission unit that emits emitting light; a light-receiving unit that receives the emitting light reflected off an object; an amplifying unit that amplifies a received-light detection signal of the light-receiving unit; a detecting unit that outputs position identifying information of the object based on an amplified signal output from the amplifying unit; a determining unit that determines a position of the object based on the position identifying information; and a coupling capacitor provided between an output node of the amplifying unit and an input node of the detecting unit, wherein the detecting unit outputs light-emitting current control information as the position identifying information, and a capacitance value of the coupling capacitor is set such that a fluctuation range of the light-emitting current control information becomes a predetermined fluctuation range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An optical detecting device comprising:
-
an emission unit that emits emitting light; a light-receiving unit that receives the emitting light reflected off an object; an amplifying unit that amplifies a received-light detection signal of the light-receiving unit; a detecting unit that outputs position identifying information of the object based on an amplified signal output from the amplifying unit; a determining unit that determines a position of the object based on the position identifying information; and a coupling capacitor provided between an output node of the amplifying unit and an input node of the detecting unit, wherein the determining unit determines the position of the object based on first-period light-emitting current control information which is the light-emitting current control information in a first period in which the object is not present in a detection region, which is a region in which the object is detected, and based on second-period light-emitting current control information which is the light-emitting current control information in a second period in which the object is present in the detection region. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
Specification