Abstract: A portable golf ball cleaning device, includes: a housing having a cleaning member; a golf ball reciprocating member for receiving and reciprocating a golf ball to allow dirt attached to the surface of the golf ball to be removed using the cleaning member; and a backflow prevention filter for defining an internal space portion formed on an underside of the housing, having a through hole formed on a central portion thereof in such a way as to pass the dirt therethrough, and preventing the dirt collected in the internal space portion from moving back to the housing.

Abstract: A method of compensating a display device includes: displaying a first display image of a calibration pattern; generating a first photograph image of the calibration pattern by capturing the first display image; generating a measurement representative position data corresponding to the calibration pattern by measuring the first photograph image; generating a third-order fitting representative position data by performing a two-dimensional third-order fitting; displaying a second display image of a full white display; generating a second photograph image of the full white display by capturing the second display image; generating a first crop image by performing a size adjustment based on the third-order fitting representative position data; calculating a luminance compensation value by comparing a measured luminance of the first crop image with a target luminance; and generating a compensated image data by applying the luminance compensation value to an image data.

Abstract: A method of compensating a display device includes: displaying a first display image of a calibration pattern; generating a first photograph image of the calibration pattern by capturing the first display image; generating a measurement representative position data corresponding to the calibration pattern by measuring the first photograph image; generating a third-order fitting representative position data by performing a two-dimensional third-order fitting; displaying a second display image of a full white display; generating a second photograph image of the full white display by capturing the second display image; generating a first crop image by performing a size adjustment based on the third-order fitting representative position data; calculating a luminance compensation value by comparing a measured luminance of the first crop image with a target luminance; and generating a compensated image data by applying the luminance compensation value to an image data.

Abstract: A display device includes a first display panel realizing a first image light of a first resolution; and a second display panel realizing a second image light synchronized with the first image light, the second image light having a second resolution lower than the first resolution, wherein a second virtual image implemented by the second image light is superimposed with a first virtual image implemented by the first image light to implement a virtual reality image.

Abstract: A method of compensating a display device includes: displaying a first display image of a calibration pattern; generating a first photograph image of the calibration pattern by capturing the first display image; generating a measurement representative position data corresponding to the calibration pattern by measuring the first photograph image; generating a third-order fitting representative position data by performing a two-dimensional third-order fitting; displaying a second display image of a full white display; generating a second photograph image of the full white display by capturing the second display image; generating a first crop image by performing a size adjustment based on the third-order fitting representative position data; calculating a luminance compensation value by comparing a measured luminance of the first crop image with a target luminance; and generating a compensated image data by applying the luminance compensation value to an image data.

Abstract: A CMP slurry composition for polishing a boron silicon (B—Si) compound may include a catalyst, an abrasive including a plurality of particles and being configured to polish the boron silicon (B—Si) compound, and a pH adjuster. The CMP slurry composition may further include an oxidizer. The catalyst may have a binary catalyst configuration comprising a first catalyst material and a second catalyst material. The first catalyst material may include Fe, and the second catalyst material may include Cu. The oxidizer may include hydrogen peroxide (H2O2). A CMP (chemical mechanical polishing) method for a boron silicon (B—Si) compound may include providing a substrate structure including a thin film formed of the boron silicon (B—Si) compound and performing a CMP process on the thin film. The CMP process is performed by using the CMP slurry composition.

Abstract: A display device includes a display panel including a plurality of pixel regions and configured to display a picture or an image, and a microlens array disposed on a front surface of the display panel. The microlens array includes a plurality of microlenses each having a polygonal pattern. Further, the microlenses can have different slanted angles.

Abstract: A liquid crystal display device includes a liquid crystal panel, an optical sheet positioned below the liquid crystal panel, a light guide plate positioned below the optical sheet, a selective light-blocking panel positioned below the light guide plate, a reflector positioned below the selective light-blocking panel, and a light emitting diode (LED) assembly positioned on a side of the light guide plate, wherein the selective light-blocking panel is sectioned into a plurality of blocks, and transmits, or diffuses and reflects light emitted to a back surface of the light guide plate for each of blocks.

Abstract: A liquid crystal display device includes a liquid crystal panel, an optical sheet positioned below the liquid crystal panel, a light guide plate positioned below the optical sheet, a selective light-blocking panel positioned below the light guide plate, a reflector positioned below the selective light-blocking panel, and a light emitting diode (LED) assembly positioned on a side of the light guide plate, wherein the selective light-blocking panel is sectioned into a plurality of blocks, and transmits, or diffuses and reflects light emitted to a back surface of the light guide plate for each of blocks.

Abstract: A backlight unit adapted to implement enhanced light efficiency and uniform brightness is disclosed. The backlight unit includes a plurality of light sources arranged at fixed intervals, a diffusion plate disposed on the plurality of light sources, prism patterns formed on one surface of the diffusion plate, and micro-lens patterns formed on the other surface of the diffusion plate. The vertex angle of each prism pattern is in a range of about 64°˜76°.

Abstract: A backlight unit for a liquid crystal display device includes a reflection plate, first and second light guide plates over the reflection plate, the second light guide plate disposed between the first light guide plate and the reflection plate, wherein the first light guide plate includes first and second sections alternating with each other, and the second light guide plate includes third and fourth sections alternating with each other, the first and third sections having patterns at rear surfaces, the second and fourth sections excluding patterns, wherein the first section corresponds to the fourth section, and the second section corresponds to the third section, first and second light-emitting diode (LED) assemblies at opposite sides of the first and second light guide plates, each of the first and second LED assemblies including LEDs arranged in first and second lines, and a plurality of optical sheets over the first light guide plate, wherein the LEDs of the first lines of the first and second LED assemb

Abstract: A backlight unit adapted to implement enhanced light efficiency and uniform brightness is disclosed. The backlight unit includes a plurality of light sources arranged at fixed intervals, a diffusion plate disposed on the plurality of light sources, prism patterns formed on one surface of the diffusion plate, and micro-lens patterns formed on the other surface of the diffusion plate. The vertex angle of each prism pattern is in a range of about 64°˜76°.

Abstract: A backlight unit for a liquid crystal display device includes a reflection plate, first and second light guide plates over the reflection plate, the second light guide plate disposed between the first light guide plate and the reflection plate, wherein the first light guide plate includes first and second sections alternating with each other, and the second light guide plate includes third and fourth sections alternating with each other, the first and third sections having patterns at rear surfaces, the second and fourth sections excluding patterns, wherein the first section corresponds to the fourth section, and the second section corresponds to the third section, first and second light-emitting diode (LED) assemblies at opposite sides of the first and second light guide plates, each of the first and second LED assemblies including LEDs arranged in first and second lines, and a plurality of optical sheets over the first light guide plate, wherein the LEDs of the first lines of the first and second LED assemb