Optical imaging system with variable light field for biometrics application
First Claim
1. An optical imaging system with a variable light field for a biometrics application, the optical imaging system comprising:
- a central processing unit (CPU);
a display, which is electrically connected to the CPU, displays information to a user or interacts with the user, and provides a digital light signal to a finger placed upon and in contact with the display, wherein the finger covers a cover region of the display, and the cover region has at least one outer region and an inner region from outside to inside; and
an optical imaging device, which is electrically connected to the CPU and disposed in or under the display, wherein the optical imaging device receives the digital light signal provided from the display to the finger and then reflected from the finger, and obtains an optical image of biometrics characteristics of the finger to obtain an image sensing signal, wherein the digital light signal provided from the display to the finger has the variable light field varying from the outer region of the cover region of the display to the inner region of the cover region of the display to compensate with environment light rays so that an environment light field plus the variable light field provides an improved light field to the finger, brightness in the outer region and the inner region of the display reaches an improved state and the optical imaging device obtains an improved sensing result.
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Accused Products
Abstract
An optical imaging system with a variable light field for a biometrics application includes: a central processing unit (CPU); a display, which is electrically connected to the CPU, displays information to a user or interacts with the user, and provides a digital light signal to an object placed upon the display, the object covers a cover region of the display, and the cover region has at least an outer region and an inner region from outside to inside; and an optical imaging device electrically connected to the CPU and disposed in or under the display, the optical imaging device receives a digital light signal reflected from the object and obtains an optical image of biometrics characteristics of the object to obtain an image sensing signal. The digital light signal has the variable light field varying from the outer region to the inner region.
13 Citations
19 Claims
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1. An optical imaging system with a variable light field for a biometrics application, the optical imaging system comprising:
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a central processing unit (CPU); a display, which is electrically connected to the CPU, displays information to a user or interacts with the user, and provides a digital light signal to a finger placed upon and in contact with the display, wherein the finger covers a cover region of the display, and the cover region has at least one outer region and an inner region from outside to inside; and an optical imaging device, which is electrically connected to the CPU and disposed in or under the display, wherein the optical imaging device receives the digital light signal provided from the display to the finger and then reflected from the finger, and obtains an optical image of biometrics characteristics of the finger to obtain an image sensing signal, wherein the digital light signal provided from the display to the finger has the variable light field varying from the outer region of the cover region of the display to the inner region of the cover region of the display to compensate with environment light rays so that an environment light field plus the variable light field provides an improved light field to the finger, brightness in the outer region and the inner region of the display reaches an improved state and the optical imaging device obtains an improved sensing result. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification