Light collimator, manufacturing method thereof and optical fingerprint identification device
AssigneeBoe Technology Group Co., Ltd.
InventorsXiaoquan HAI, Haisheng WANG, Lei WANG
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Abstract
The present disclosure relates to a light collimator, a manufacturing method thereof, and an optical fingerprint identification device. The light collimator includes a first filter film area and a plurality of second filter film units distributed in the first filter film area to form a flat film with the first filter film area. The light that the first filter film area allows to pass has a wavelength different from a wavelength of the light that the plurality of second filter film units allows to pass. With the solution of the present disclosure, the present disclosure can overcome existing difficulties in optical collimation structures.
Claims20
A light collimator, comprising:
- a first filter unit comprising a plurality of through holes;
- and
- a plurality of second filter units disposed within the through holes, wherein light that the first filter unit allows to pass has a wavelength different from a wavelength of the light that the plurality of second filter units allows to pass.
An optical fingerprint identification device, comprising:
- a light emitting device configured to emit light when fingerprint identification is performed, wherein the emitted light is reflected by a fingerprint;
- a light collimator disposed under the light emitting device and configured to receive the light reflected by the fingerprint;
- and
- a sensor disposed under the light collimator and configured to receive the light transmitted through the light collimator, wherein the light collimator comprises:
- a first filter unit comprising a plurality of through holes;
- and
- a plurality of second filter units disposed within the through holes, wherein light that the first filter unit allows to pass has a wavelength different from a wavelength of the light that the plurality of second filter units allows to pass.
A method for manufacturing a light collimator, comprising:
- (i) forming a first filter unit material on a substrate;
- (ii) patterning the first filter unit material with a mask having a plurality of holes to form a pattern of the first filter unit;
- and
- (iii) forming a second filter unit material with the mask having a plurality of holes, such that the second filter unit material is deposited through the holes to a region where the first filter unit material is not formed to obtain a plurality of second filter units, wherein light that the first filter unit allows to pass has a wavelength different from a wavelength of the light that the plurality of second filter units allows to pass.
Dependencies are inferred from the claim text.