Detection device
AssigneeJapan Display Inc.
InventorsYasushi TOMIOKA, Yuta HAGA
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Abstract
According to an aspect, a detection device includes: an optical sensor comprising a plurality of light-receiving elements configured to receive light; and a front light that is located on an object to be detected side of the optical sensor and comprises a light guide film and a plurality of light sources configured to emit light to a first side surface of the light guide film. A wire-grid polarizer configured to separate the light incident from the light source into first polarized light and second polarized light is located between the optical sensor and the front light.
Claims20
A detection device comprising:
- an optical sensor comprising a plurality of light-receiving elements configured to receive light;
- and
- a front light that is located on an object to be detected side of the optical sensor and comprises a light guide film and a plurality of light sources configured to emit light to a first side surface of the light guide film, wherein
- a wire-grid polarizer configured to separate the light incident from the light source into first polarized light and second polarized light is located between the optical sensor and the front light.
A detection device comprising:
- an optical sensor comprising a plurality of light-receiving elements configured to receive light;
- a front light that is located on an object to be detected side of the optical sensor and comprises a light guide film;
- and
- an optical filter layer located between the optical sensor and the front light, wherein
- the optical sensor, the optical filter layer, and the front light are stacked in the order as listed, and
- the front light comprises a plurality of light sources configured to emit light to a first side surface of the light guide film, and comprises a reflector plate on a second side surface of the light guide film opposite the light sources.
A detection device comprising:
- an optical sensor comprising a plurality of light-receiving elements configured to receive light;
- a front light that is located on an object to be detected side of the optical sensor and comprises a light guide film;
- and
- an optical filter layer located between the optical sensor and the front light, wherein the optical sensor, the optical filter layer, and the front light are stacked in the order as listed, and
- the front light comprises a plurality of light sources configured to emit light to a first side surface of the light guide film, and
- a light-transmitting protective film is provided on a detection surface side of the light guide film.
A detection device comprising:
- an optical sensor comprising a plurality of light-receiving elements configured to receive light;
- a front light that is located on an object to be detected side of the optical sensor and comprises a light guide film;
- and
- an optical filter layer located between the optical sensor and the front light, wherein the optical sensor, the optical filter layer, and the front light are stacked in the order as listed, and
- an inclination angle of a side surface of the light guide film on which light is incident is at an angle other than 90° with respect to a detection surface of the light guide film.
A detection device comprising:
- an optical sensor comprising a plurality of light-receiving elements configured to receive light;
- a front light that is located on an object to be detected side of the optical sensor and comprises a light guide film and a plurality of light sources configured to emit light to a first side surface of the light guide film;
- and
- an optical filter layer located between the optical sensor and the front light, wherein
- the optical sensor, the optical filter layer, and the front light are stacked in the order as listed,
- the detection device comprises a light entrance on a side surface side of the light guide film on which light of the light guide film is incident, and
- the light entrance has a trapezoidal shape in sectional view.
Dependencies are inferred from the claim text.