Abstract:
In a liquid crystal display apparatus, a lower substrate has a transmissive electrode formed in a transmissive area of a first substrate and a reflective electrode formed in a reflective area of the first substrate. An upper substrate has a second substrate, a first insulating layer formed on the second substrate corresponding to the transmissive area, a common electrode formed on the first insulating layer and the second substrate corresponding to the reflective area, and a second insulating layer formed on the common electrode corresponding to the reflective area. Accordingly, the liquid crystal display apparatus may have a uniform cell gap, thereby improving a reflectance and a transmittance thereof.
Abstract:
A system on chip processor for a multimedia device includes: a pre-processing circuit to convert an external image signal into a compressed input signal for compressing; an encoder/decoder circuit to generate compressed data by compressing the compressed input signal and outputting a coded image signal by decompressing the compressed data; a post-processing circuit to convert the coded image signal into a signal that can be used by an image displaying device; a first system bus connected with pre-processing circuit and post-processing circuit; a second system bus connected with the encoder/decoder circuit; a first bridge DMA circuit to mutually transmit data between first system bus and second system bus; and a controller to control the operation of the circuits.
Abstract:
Disclosed is a method for forming a photosensitive insulating film pattern and a reflection electrode each having an uneven upper surface, and a method for manufacturing an LCD having a reflection electrode using the same. A photosensitive insulating film is formed on a first substrate on which a first electrode having a reflection property is formed. The photosensitive insulating film is exposed to a light. The exposed photosensitive insulating film is developed to form an uneven surface with prominences and recesses. The reflection electrode is formed on the photosensitive insulating film. A second substrate having a transparent electrode is formed to face the first substrate. A liquid crystal layer is sandwiched between the first substrate and the second substrate. A first amount of light of the light scanned between first patterns corresponding to an upper portion of the first electrode is smaller than a second amount of light thereof scanned between second patterns corresponding to a portion other than the first electrode. The dents or grooves formed at the photosensitive insulating film and the entire surface of the reflection electrode formed on the photosensitive insulating film have the same depth, to thereby improve the reflection efficiency throughout the entire area of the display region.
Abstract:
An apparatus for and a method of controlling a brightness and energy consumption of a back light in a portable display. A determination is made whether an input voltage of the portable display is provided by a DC power source or batteries and a control voltage is adjusted to control a duty cycle of a pulse width modulator which supplies power to the back light based on the determination. An initial value of the control voltage may be initially set according to power provided by one of the DC voltage source and the batteries so that the control voltage is automatically changed where the input voltage is provided from the other of the DC voltage source and the batteries.
Abstract:
In an LCD apparatus, a reflecting plate, which is formed on a pixel electrode connected to a switching device formed on an array substrate, defines a reflecting area from which a natural light is reflected and a transmitting area through which an artificial light is transmitted. The reflecting plate is partially extended to and overlapped with the transmitting area depending upon a rubbing direction of the array substrate. Thus, the reflective-transmissive type LCD apparatus may prevent occurrence of the afterimage, and may enhance a contrast ratio thereof when operated in a transmissive mode.
Abstract:
A backlight driving apparatus is provided which effectively suppresses noise by synchronizing a frequency of a pulse width modulation (PWM) signal to drive a backlight which projects rays on a liquid crystal panel with a scan frequency of the liquid crystal panel. The backlight driving apparatus is used for an liquid crystal display having a liquid crystal panel to display a picture signal and a backlight to project rays on the liquid crystal panel, and includes an NTSC/PAL detector, which detects a vertical frequency of the picture signal, and an inverter, which receives a predetermined constant voltage and generates the PWM signal to drive the backlight. The inverter controls the frequency of the PWM signal based on a decision result of the NTSC/PAL detector.
Abstract:
A display apparatus and method according to which ambient temperature of the display apparatus is measured, and a backlight driving voltage of the display apparatus is controlled based on the measured temperature. A display apparatus includes a backlight, a temperature sensing unit, and a voltage control unit. The backlight provides light to the display apparatus, and the temperature sensing unit measures the ambient temperature of the display apparatus. The voltage control unit compares the measured temperature to a predetermined temperature and controls a voltage applied to the backlight.
Abstract:
A liquid crystal display, in accordance with the present invention, includes a first substrate having a thin film transistor and a first electrode formed thereon. The first electrode is electrically connected to the thin film transistor. A first insulating layer is formed on the first substrate including the thin film transistor and the first electrode and a window is formed in the first insulating layer, the window exposing a predetermined region of the first electrode. A second electrode is provided on the first insulating layer and electrically connected to the first electrode. A second substrate includes a third electrode formed thereon. A first gap is formed between a surface of the third electrode and a surface of the predetermined region of the first electrode, and a second gap is formed between the surface of the third electrode and a surface of the second electrode. A liquid crystal layer is interposed between the first gap and the second gap. Other embodiments are included as well as methods for forming the liquid crystal display of the present invention.
Abstract:
A SOC processor for multimedia capable of improving three-dimensional graphic process speed includes a pre-processor circuit unit to convert an image signal transmitted from the outside into a compressed input signal for compressing the image signal, an encoder/decoder circuit unit to create a compressed data by compressing the compressed input signal, and to encode the compressed data, a post-processor to convert the coded image signal so that an image displaying apparatus can use the image signal, a graphic accelerator to process three-dimensional graphic computation with respect to the image signal output on the image displaying apparatus, a first system bus connected with the encoder/decoder circuit unit, a second system bus connected with the pre-processor, post-processor, and graphic accelerator, and a controlling unit to control the above circuit units. The first system bus and second system bus can communicate data each other by a bridge DMA circuit unit.