Abstract:
An optical lens includes a recessed part and a refracting part. The recessed part has a substantially circular plan view and a substantially V shaped cross-section. The recessed part forms an angle of no more than an angle of about 20° with respect to a vertical line. The recessed part has a plurality of curved surfaces including different radii so that a light incident into the recessed part is totally reflected from the curved surfaces. The refracting part has a substantially circular plan view extended from the recessed part. A light incident into the refracting part and the reflected light from the recessed part are refracted from the refracting part. Therefore, a luminance uniformity and a color uniformity are improved.
Abstract:
An optical lens includes a recessed part and a refracting part. The recessed part has a substantially circular plan view and a substantially V shaped cross-section. The recessed part forms an angle of no more than an angle of about 20° with respect to a vertical line. The recessed part has a plurality of curved surfaces including different radii so that a light incident into the recessed part is totally reflected from the curved surfaces. The refracting part has a substantially circular plan view extended from the recessed part. A light incident into the refracting part and the reflected light from the recessed part are refracted from the refracting part. Therefore, a luminance uniformity and a color uniformity are improved.
Abstract:
A method of forming a floating gate of a non-volatile memory device can include etching a mask pattern formed between field isolation regions in a field isolation pattern on a substrate to recess a surface of the mask pattern below an upper surface of adjacent field isolation regions to form an opening having a width defined by a side wall of the adjacent field isolation regions above the surface. Then the adjacent field isolation regions is etched to increase the width of the opening.
Abstract:
A backlight unit driving apparatus is provided. The backlight unit driving apparatus includes a plurality of flash lamps at a backlight unit to supply light to a liquid crystal panel, supplies voltage necessary for discharge, and supplies a discharge initiating voltage so that the flash lamps can emit lights in a sequential order. Accordingly, motion picture characteristics improve, and good screen brightness is maintained.
Abstract:
A light-guide plate includes a base plate, first protrusion patterns and second protrusion patterns. The first protrusion patterns are formed on a left portion of an upper surface of the base plate with respect to a central line of the upper surface. The first protrusion patterns have a cross-section of a trapezoidal shape which has a top and a bottom parallel with each other and first and second inclined sides inclined at different angles with respect to the bottom side. The second protrusion patterns are formed on a right portion of the upper surface with respect to the central line. A cross-section of the second protrusion patterns have the trapezoidal shape and disposed substantially symmetrical to the first protrusion patterns with respect to the central line.
Abstract:
Disclosed herein are a light guide plate and a backlight assembly using the same, which may improve the uniformity of light using prism patterns having a trapezoidal shape. The light guide plate includes a body, a plurality of first projections, and a plurality of second projections. The body includes an incident surface to which light is incident and an emitting surface from which the incident light is emitted. The plurality of first projections is disposed on the emitting surface of the body and has a trapezoidal shape in a section perpendicular to the incident surface. The plurality of second projections is disposed on the emitting surface of the body and has a shape symmetrical to a shape of the first projections.
Abstract:
A liquid crystal display device, includes: a liquid crystal panel; a point light source which emits light to the liquid crystal panel; and a light source driver which comprises a power input terminal to receive initial power, a power supply to supply power to the point light source according to the initial power and a reference current, and a reference current controller to output the changed reference current according to the changed initial power, to the power supply.
Abstract:
An inverting flip-flop (F/F) circuit type monostable-bistable transition logic element (MOBILE) circuit that uses resonant tunneling diodes (RTDs) and can prevent a malfunction caused by low peak-to-valley current ratio (PVCR) characteristics of the RTD includes an input data conversion circuit and an inverting F/F circuit. The input data conversion circuit receives input data and converts a logic level of the input data according to a logic level of output data of the MOBILE circuit. The inverting F/F circuit inverts a logic level of data output from the input data conversion circuit and outputs the output data. Accordingly, even when a logic level of input data changes from LOW to HIGH, the logic level of output data can be maintained HIGH in the inverting F/F type MOBILE circuit constructed using silicon semiconductor based RTDs with a small PVCR. Therefore, it is possible to enhance the performance of the inverting F/F circuit type MOBILE circuit.
Abstract:
A liquid crystal display device with a display region and a non-display region surrounding the display region, the liquid crystal display device comprising: a first substrate; a second substrate which faces the first substrate; and a liquid crystal layer which is interposed between the first substrate and the second substrate, the first substrate comprising: a first insulating substrate; gate and data lines which are formed on the first insulating substrate and intersecting each other; a pixel thin film transistor formed on the display region and electrically connected to the gate and data lines; a pixel electrode electrically connected to the pixel thin film transistor; a gate driver formed on the non-display region and connected to the gate line to drive the gate line; and a direct current (DC)/DC converter formed on the non-display region and comprises a converter thin film transistor and a capacitance part; the capacitance part includes: a first capacitance part which comprises a first electrode, a first dielectric layer formed on the first electrode, and a second electrode formed on the first dielectric layer; and a second capacitance part which comprises the second electrode, a second dielectric layer formed on the second electrode, and a third electrode formed on the second dielectric layer.
Abstract:
A liquid crystal display (LCD) includes associated pairs of amplifiers used in an output buffer of a data driver to implement dot inversion driving of the LCD. The data driver includes a first amplifier having an output terminal connected to a first data line and outputting a positive polarity voltage, a second amplifier having an output terminal connected to a second data line and outputting a negative polarity voltage, and a switching unit connected between the output terminals of the two amplifiers and the two data lines and operative in response to a switching signal to interchange the amplifier output signals respectively applied to the data lines.