Abstract:
An optical unit includes a base, a light-condensing member disposed on the base to condense a first portion of light that is incident onto the base and protrusion members disposed on a surface of the light-condensing member to scatter a second portion of the light that is incident onto the base. A backlight assembly includes light sources, an optical unit receiving light from the light sources to condense and scatter the light, and may also include an optical member disposed over the optical unit to enhance the front luminance of the light. A display device includes light sources, an optical module and a display panel. Thus, display quality of the display device may be enhanced.
Abstract:
A method for forming a fine pattern using isotropic etching, includes the steps of forming an etching layer on a semiconductor substrate, and coating a photoresist layer on the etching layer, performing a lithography process with respect to the etching layer coated with the photoresist layer, and performing a first isotropic etching process with respect to the etching layer including a photoresist pattern formed through the lithography process, depositing a passivation layer on the etching layer including the photoresist pattern, and performing a second isotropic etching process with respect to the passivation layer. The second isotropic etching process is directly performed without removing the predetermined portion of the passivation layer.
Abstract:
An optical lens has a first curved surface. The first curved surface has a first variable curvature. The optical lens has a second curved surface. The second curved surface has a second variable curvature. The second variable curvature forms a protrusion on the second curved surface. A first end of the first curved surface is connected to a first end of the second curved surface at an outer edge of the lens.
Abstract:
A flat-type fluorescent lamp includes a body having a plurality of discharge spaces, an electrode part disposed inside the body and crossing each of the discharge spaces and a light generating part generating a visible light by using the emitted electron. The electrode part includes an electron-transporting electrode transporting electrons from an exterior and an electron-emitting electrode on the transporting electrode to activate emission of the electrons to the discharge spaces. The flat-type fluorescent lamp has high brightness and low power consumption.
Abstract:
A two-dimensional light source includes a base substrate having holes, wires disposed on a lower surface of the base substrate, a light emitting diode (LED) chip disposed on an upper surface of the base substrate, plugs that connect two electrodes of the LED chip to the wires through the holes, a buffer layer covering the LED chip, and an optical layer that is disposed on the buffer layer and has an optical pattern formed at a portion of the optical layer corresponding to the LED chip.
Abstract:
A flat-type fluorescent lamp includes a lamp body and a first external electrode. The first external electrode is positioned on an end portion of the lamp body. The first external electrode includes a main electrode portion and a first auxiliary electrode portion. The main electrode portion crosses end portions of the discharge spaces. The first auxiliary electrode portion protrudes from the main electrode portion. The first auxiliary electrode portion corresponds to an outer discharge space adjacent to a side of the lamp body. Therefore, a luminance of the flat-type fluorescent lamp may be made more uniform, thereby improving an image display quality. In addition, operation of the flat-type fluorescent lamp at a low temperature may be improved.
Abstract:
An optical unit includes a base, a light-condensing member disposed on the base to condense a first portion of light that is incident onto the base and protrusion members disposed on a surface of the light-condensing member to scatter a second portion of the light that is incident onto the base. A backlight assembly includes light sources, an optical unit receiving light from the light sources to condense and scatter the light, and may also include an optical member disposed over the optical unit to enhance the front luminance of the light. A display device includes light sources, an optical module and a display panel. Thus, display quality of the display device may be enhanced.
Abstract:
A two-dimensional light source includes a base substrate having holes, wires disposed on a lower surface of the base substrate, a light emitting diode (LED) chip disposed on an upper surface of the base substrate, plugs that connect two electrodes of the LED chip to the wires through the holes, a buffer layer covering the LED chip, and an optical layer that is disposed on the buffer layer and has an optical pattern formed at a portion of the optical layer corresponding to the LED chip.
Abstract:
A flat fluorescent lamp includes a lamp body and an external electrode. The lamp body includes a plurality of discharge spaces. Each of the discharge spaces includes a first discharge region having a first space width and a first space length, a second discharge region having a second space width and a second space length, and a third discharge region having a third space width and third space length. The second discharge region is disposed between the first and third discharge regions. The second space width is smaller than the first and third space widths, and the second space length is smaller than the first and third space lengths. Thus, an electrode part of the flat fluorescent lamp is prevented from being blackened due to dendrite generated at the electrode part, so that the display quality of the liquid crystal display device having the flat fluorescent lamp can be improved.
Abstract:
A DC-DC converter includes a main inductor connected to an input voltage, a main switching element connected in series to the main inductor, a main diode connected to the main inductor and a load, and a main capacitor connected to the main diode and the load, the DC-DC converter changing the input voltage to output a changed input voltage as an output voltage. The DC-DC converter further includes an oscillator connected between the main inductor and the main diode, an auxiliary switching element connected to the oscillator, the auxiliary switching element changing an operation state based on an externally applied control signal to control the oscillator, and a diode unit connected to the oscillator and the auxiliary switching element and controlling current flow based on operations of the oscillator and the auxiliary switching element to change the output voltage. The main switching element and the main diode are to be zero voltage switching or zero current switching in accordance with the operations of the oscillator and the auxiliary switching element.