Abstract:
A backlight assembly and liquid crystal display (LCD) having the same each include a surface light source including a lower substrate, an upper substrate joined to an outer circumference of the lower substrate and forming a discharge space, and an electrode formed on the joined upper and lower substrates, and at least one light source holder including an upper support plate, a lower support plate, and a sidewall for connecting the upper support plate and the lower support plate, and covering the electrode formed on the joined upper and lower substrates from a side of the joined upper and lower substrates.
Abstract:
An optical tape cassette and a player for using the cassette. The optical tape cassette includes a drum on which optical tape is wound and two tape reels for supplying and winding the tape. The cassette player includes a driver having two rotating members which can be connected to the drum and tape take-up reel for driving the drum and tape take-up reel, respectively, and an optical pickup for projecting a light beam onto the optical tape which is wound about the periphery of the drum, thereby realizing a simplified structure and easy handling for home use.
Abstract:
A surface light source unit of a liquid crystal display device that is capable of preventing occurrence of a dark area caused by external electrode elements. The surface light source unit of a liquid crystal display unit comprises a surface light source body having a plurality of discharge sections which are divided into first regions where the discharge sections are shaded by a support frame, and a second region where the discharge sections are exposed without being shaded by the support frame, and first external electrode elements provided on the surface light source body to correspond to the first regions that cover an area of the plurality of discharge sections that is smaller than the first regions. As a result, luminance of light projected from the surface light source unit can be uniformly controlled, and a display quality can be enhanced.
Abstract:
A power supply system has a power supply unit generating a power supply voltage signal, a voltage controller generating a first power supply control signal in response to the power supply voltage signal and a lamp-on/off signal, an inverter controller being driven in response to the first power supply control signal, and an inverter driving a lamp in response to a control signal from the inverter controller. The first power supply control signal prevents the inverter from being shut down. The voltage controller includes a comparator comparing a comparison voltage signal with a reference signal, a switch unit being turned on or off in response to the lamp-on/off signal and an output signal of the comparator, and a constant voltage generator providing a constant voltage signal as the first power supply control signal to the inverter controller. A liquid crystal display device has a timing controller, gate and data drivers, a display panel, a lamp unit, and the power supply system for providing electric power to the lamp unit.
Abstract:
A power supply system has a power supply unit generating a power supply voltage signal, a voltage controller generating a first power supply control signal in response to the power supply voltage signal and a lamp-on/off signal, an inverter controller being driven in response to the first power supply control signal, and an inverter driving a lamp in response to a control signal from the inverter controller. The first power supply control signal prevents the inverter from being shut down. The voltage controller includes a comparator comparing a comparison voltage signal with a reference signal, a switch unit being turned on or off in response to the lamp-on/off signal and an output signal of the comparator, and a constant voltage generator providing a constant voltage signal as the first power supply control signal to the inverter controller. A liquid crystal display device has a timing controller, gate and data drivers, a display panel, a lamp unit, and the power supply system for providing electric power to the lamp unit.
Abstract:
A circuit is provided for driving a second harmonic generator, wherein an unstable optical output caused by a non-linear optical element is stabilized. The optical output value produced by the second harmonic generator is integrated using an integration coefficient selected using a switch according to the level of the optical output value. The integration coefficient may be defined using a first integration coefficient setting resistor connected in parallel with a series connection including a second integration coefficient setting resistor and a negative-polarity-controlled switch.
Abstract:
A display device, including: a light source part having a plurality of light sources; a color sensing part having a dummy light source, and a color sensor sensing a color information of light emitted from the dummy light source; a light source driving part driving the light source part so that the light sources sequentially emit at least two colored lights with a predetermined period, and supplying power to the dummy light source; and a control part controlling the light source driving part depending on the sensed color information so that a color coordinate of the light sources has a predetermined reference value.
Abstract:
A surface light source unit and an LCD device having the same having an improved structure to minimize a dark portion caused by an outer electrode portion. The surface light source unit of the LCD device includes a discharge portion formed between a first substrate and a second substrate disposed opposite to the first substrate, a first outer electrode portion disposed on the first substrate inside the discharge portion to be supplied with power, a first frit disposed on the first substrate inside the discharge portion opposite the first outer electrode portion. The discharge portion performs a discharge according to the power supplied to the first outer electrode portion. Since the first frit increases the number of secondary emitting electrons, the dark portion can be minimized.
Abstract:
A surface light source device capable of emitting the light having uniform brightness with lower power consumption is provided. The surface light source device includes a light source body and at least one discharge voltage applying part. The light source body includes a bottom plate; a top plate which is disposed over the bottom plate to form a flat receiving space between the bottom plate and the top plate, the flat receiving space receiving discharge gas; and at least one space-dividing wall which is disposed on the bottom plate and divides the flat receiving space into at least two discharge spaces. The discharge voltage applying part is disposed on an outer surface of the light source body and applies discharge voltage to the light source body.