Abstract: An electronic device includes a power supply; a display including light-emitting diodes (“LED”s), a projection lens, and a waveguide arranged in a way such that light emitted from the LEDs is input to the waveguide through the projection lens, and light-outputting efficiency of the waveguide for a first color is higher than light-outputting efficiency of the waveguide for a second color; a memory; and a processor which determines a first driving power for a first LED which emits light of the first color and a second driving power for a second LED which emits light of the second color based on the light-outputting efficiencies of the waveguide for the first color and the second color, and controls the power supply in a way such that the first and second driving powers are supplied to the first and second LEDs, respectively.

Abstract: Provided is a waveguide-type display device including a waveguide, an input coupler provided on the waveguide and configured to transmit an image to travel into the waveguide, an output coupler provided on the waveguide and configured to output the image traveling in the waveguide to an outside of the waveguide, and a field-of-view (FOV) expander configured to output an image having an expanded FOV by deflecting and outputting the image output from the output coupler in a certain direction based on polarization characteristics of the image.

Abstract: A transparent panel is provided. The transparent panel includes a polarization plate, a transparent diffusion plate which is disposed on one side of the polarization plate and is configured to transmit light incident from a side of the polarization plate and to reflect and diffuse a light incident from an opposite side of the polarization plate, a ¼ wavelength plate which is disposed on one side of the transparent diffusion plate and is configured to convert a polarization direction of an incident light, and a lens part which is disposed on one side of the ¼ wavelength plate. The lens part includes a lens array comprising a birefringent material having different refractive indexes according to a polarization direction of an incident light, and a refractive index alignment member configured to transmit or refract the light according to a polarization direction of a light that penetrates the lens array.

Abstract: A transparent panel is provided. The transparent panel includes a polarization plate, a transparent diffusion plate which is disposed on one side of the polarization plate and is configured to transmit light incident from a side of the polarization plate and to reflect and diffuse a light incident from an opposite side of the polarization plate, a ¼ wavelength plate which is disposed on one side of the transparent diffusion plate and is configured to convert a polarization direction of an incident light, and a lens part which is disposed on one side of the ¼ wavelength plate. The lens part includes a lens array comprising a birefringent material having different refractive indexes according to a polarization direction of an incident light, and a refractive index alignment member configured to transmit or refract the light according to a polarization direction of a light that penetrates the lens array.

Abstract: A testing apparatus for testing a display apparatus includes a base substrate, a plurality of fixing tools on the base substrate to affix the display apparatus to the base substrate, the plurality of fixing tools being movable in a z-axis direction independently of each other, the z-axis direction extending along a normal direction to the base substrate, and a controller that controls the fixing tools to bend the display apparatus in two or more test patterns different from each other.

Abstract: A testing apparatus for testing a display apparatus includes a base substrate, a plurality of fixing tools on the base substrate to affix the display apparatus to the base substrate, the plurality of fixing tools being movable in a z-axis direction independently of each other, the z-axis direction extending along a normal direction to the base substrate, and a controller that controls the fixing tools to bend the display apparatus in two or more test patterns different from each other.