Awareness glasses, car mirror unit, and display apparatus

Abstract

A pair of awareness glasses includes a frame, a light source, a driving unit, light guide lenses, and diffraction grating patterns. The light source unit is disposed in the frame. The light source unit is configured to generate light in response to input power. The driving unit is configured to supply the input power. The light guide lenses are configured to guide the light to the eyes of a user. The diffraction grating patterns are formed on surfaces of the light guide lenses. The diffraction grating patterns are configured to diffract and reflect the light to the eyes of the user. The light output from each of the diffraction grating patterns has a peak wavelength between 444 nm and 484 nm.

What is claimed is: 
     
         1 . A pair of awareness glasses, comprising:
 a frame;   a light source disposed in the frame, the light source being configured to generate light in response to input power;   a driving unit configured to supply the input power;   light guide lenses configured to guide the light to eyes of a user; and   diffraction grating patterns formed on surfaces of the light guide lenses, the diffraction grating patterns being configured to diffract and reflect the light to the eyes of the user,   wherein light output from each of the diffraction grating patterns has a peak wavelength between 444 nm and 484 nm.   
     
     
         2 . The pair of awareness glasses of  claim 1 , wherein a period of the diffraction grating patterns is within a range between 464 nm and 692.5 nm. 
     
     
         3 . The pair of awareness glasses of  claim 1 , wherein the diffraction grating patterns protrude from inner surfaces of the light guide lenses towards the eyes of the user. 
     
     
         4 . The pair of awareness glasses of  claim 4 , wherein each diffraction grating pattern comprises one of a triangular pillar shape, a cylindrical pillar shape, and a quadrilateral pillar shape. 
     
     
         5 . The pair of awareness glasses of  claim 3 , wherein a height from the inner surface of each diffraction grating pattern is less than 10 μm. 
     
     
         6 . The pair of awareness glasses of  claim 1 , wherein the area of each light guide lens has a diameter of 1 mm to 3 cm. 
     
     
         7 . The pair of awareness glasses of  claim 1 , wherein:
 the light source comprises a pair of light sources; and   each light guide lens comprises one of the pair of light sources disposed thereon.   
     
     
         8 . The pair of awareness glasses of  claim 1 , wherein the frame comprises:
 a pair of rims respectively jointed to edges of the pair of light guide lenses;   a bridge connecting the pair of rims; and   a pair of temples hinge jointed to the pair of rims.   
     
     
         9 . The pair of awareness glasses of  claim 8 , wherein the driving unit is disposed in one of the temples and the bridge. 
     
     
         10 . The awareness glasses of  claim 8 , further comprising:
 a switch unit configured to transfer the power from the driving unit to the light source unit.   
     
     
         11 . The awareness glasses of  claim 10 , wherein the switch unit is disposed in at least one of the temples and the bridge. 
     
     
         12 . A car mirror unit, comprising:
 a light source unit configured to generate light in response to a driving voltage;   a driving unit configured to supply the driving voltage to the light source unit;   a light guide mirror configured to guide the light, the light guide mirror being disposed in front of a driver; and   a diffraction grating pattern formed on a surface of the light guide mirror, the diffraction grating pattern being configured to diffract and reflect the light to the eyes of the driver,   wherein light output from the diffraction grating pattern has a peak wavelength between 444 nm and 484 nm.   
     
     
         13 . The car mirror unit of  claim 12 , wherein a period of the diffraction grating pattern is within a range between 464 nm and 692.5 nm. 
     
     
         14 . The car mirror unit of  claim 12 , wherein the diffraction grating pattern comprises one of a triangular pillar shape, a cylindrical pillar shape, and a quadrilateral pillar shape. 
     
     
         15 . The car mirror unit of  claim 12 , further comprising:
 a switch unit configured to transfer the driving voltage from the driving unit to the light source unit,   wherein the switch unit is turned on or off by the driver.   
     
     
         16 . The car mirror unit of  claim 12 , further comprising:
 a sleepiness determination unit configured to determine whether the driver is drowsy; and   a switch unit configured to transfer the driving voltage from the driving unit to the light source unit according to the determination result of the sleepiness determination unit.   
     
     
         17 . A display apparatus, comprising:
 a display unit configured to display an image; and   an awareness optical unit disposed on the display unit, the awareness optical unit being configured to provide a user with light in a peak wavelength ranging from 444 nm to 484 nm,   wherein the awareness optical unit comprises:
 a light source unit configured to generate light; and 
 an awareness plate disposed on the display unit to guide the light from the light source unit, the awareness plate comprising a diffraction grating pattern formed on a surface of the awareness plate, and 
   wherein the diffraction grating pattern is configured to diffract and reflect the guided light to the eyes of the user.   
     
     
         18 . The display apparatus of  claim 17 , wherein a period of the diffraction grating pattern is within a range between 464 nm and 692.5 nm. 
     
     
         19 . The display apparatus of  claim 17 , wherein the diffraction grating pattern protrudes from the awareness plate in one of a triangular pillar shape, a cylindrical pillar shape, and a quadrilateral pillar shape. 
     
     
         20 . The display apparatus of  claim 17 , further comprising:
 a switch unit configured to switch an operation of the light source unit based on user input.