摘要:
An integral-type liquid crystal display module has a first display panel and a second display panel, and it can use a display panel of high resolution as the second display panel. The display device includes a first display panel, a second display panel, and a first flexible printed circuit board which connects the first display panel and the second display panel. The first display panel includes a display drive unit. Video lines of the second display panel are connected with the display drive unit through connection lines for video lines of the first flexible printed circuit board. Further, the second display panel includes a scanning line drive unit which supplies drive voltages to scanning lines of the second display panel.
摘要:
The present invention provides a liquid crystal display device which can be used in a miniaturized portable equipment, wherein the liquid crystal display device integrally incorporates a drive circuit therein so that a circuit scale can be miniaturized. A liquid crystal drive circuit includes a first drive circuit and a second drive circuit which is mounted on one side of the liquid crystal display panel. One output of the first drive circuit is connected to a plurality of signal lines and the second drive circuit supplies signals to the first drive circuit. The liquid crystal display panel includes holding capacitive elements and signals are supplied to the holding capacitive elements from the second drive circuit. The second drive circuit includes a booster circuit for supplying signals to the first drive circuit and the holding capacitive elements.
摘要:
A communication system exchanges electronic mail information. Communication devices are operable to input a telephone number that includes an identification number of a telephone telecommunication services operator and to transmit electronic mail information together with the telephone number. A storage device is operable to store a reference table in which the identification number of a telecommunication services operator is correlated with the domain name of the telecommunication services operator. A communication management device is operable to receive the transmitted electronic mail information and telephone number, to read the domain name of the telecommunication services operator from the reference table using the identification number of the telecommunication services operator, to merge the telephone number with the domain name read from the reference table to form an electronic mail address, and to forward the electronic mail information to the electronic mail address.
摘要:
The present invention, in a display device which includes a SRAM, prevents a phenomenon that power source fluctuation and display timings are not synchronized and hence, flickering occurs on a display surface of a liquid crystal panel. A display device includes a display panel having a plurality of pixels and scanning lines which apply a scanning voltage to the plurality of pixels; and a drive circuit which supplies a scanning voltage to the scanning lines, wherein the drive circuit includes a first booster circuit which generates a first voltage by elevating a reference voltage, a regulator which regulates the first voltage, and a second booster circuit which generates a second voltage by elevating a voltage outputted from the regulator. The second booster circuit generates the second voltage (selective scanning voltage) and a third voltage (non-selective scanning voltage). When video data is inputted from the outside based on an RGB interface, the second booster circuit is operated in response to an external clock.
摘要:
A liquid crystal display device has a semiconductor integrated circuit capable of outputting a voltage equal to or higher than the source-drain withstand voltage of a component transistor. A switching circuit has first conducting-type first and second transistors connected in series between a first input terminal and a common output terminal and second conducting-type third and fourth transistors connected between a second input terminal and the common output terminal and a switching control circuit for controlling the switching circuit. The switching control circuit applies first and second bias voltages for turning on the second and fourth transistors to the gate electrodes of the second and fourth transistors, and applies a control voltage for selectively turning on/off the first or third transistor to the gate electrodes of the first and third transistors.
摘要:
An optimum driving method is realized in a miniaturized liquid crystal display device having two liquid crystal display panels so as to low power consumption. The liquid crystal display device includes a first liquid crystal display panel, a second liquid crystal display panel, a drive circuit which is mounted on the first liquid crystal display panel, output terminals which are formed on the first liquid crystal display panel and to which signals outputted from the drive circuit are supplied, and connection lines which connect the output terminals and the second liquid crystal display panel, wherein the drive circuit can change the AC driving method employed during a display period of the first liquid crystal display panel and the AC driving method employed during a display period of the second liquid crystal display panel which are present within the same frame.
摘要:
A liquid crystal display device capable of improving display quality by enabling proper execution of receipt and acceptance of image signals through compensation for variation in duty ratios of clock signals as input to liquid crystal driver circuitry, is provided. In a liquid crystal display device comprising a liquid crystal display element and liquid crystal driver circuitry, the liquid crystal driver circuitry is operable to receive an image signal as input thereto for taking it into a bus at the timing of a change of an internal clock signal from a first level to a second level or alternatively its change from the second level to the first level and then select from the image signal as taken or “accepted” into the bus a voltage used to drive the liquid crystal display element, wherein the internal clock signal is the clock signal that causes a first level period and a second level period of an external clock signal being input to the liquid crystal driver circuitry to be made identical or equalized by a clock compensation circuit to specified values respectively.
摘要:
Each video signal driver circuit in a liquid crystal display device includes a first amplifier circuit with a first output terminal and first and second input terminals; a second amplifier circuit with a second output terminal and third and fourth input terminals; a first connecting circuit switchable between a first connection wherein an output voltage from the first output terminal is input to the first input terminal as a reference voltage, and a second connection wherein the output voltage from the first output terminal is input to the second input terminal as a reference voltage; and a second connecting circuit switchable between a third connection wherein an output voltage from the second output terminal is input to the third input terminal as a reference voltage, and a fourth connection wherein the output voltage from the second output terminal is input to the fourth input terminal as a reference voltage.
摘要:
A liquid crystal display device includes a liquid crystal panel having plural pixels and a video signal line driver circuit for supplying a video signal voltage to each of the pixels via a corresponding one of plural video lines in accordance with a P-bit display data. The video signal line driver circuit includes a power supply circuit for supplying Q different gray-scale voltages, plural selector circuits corresponding to the video lines, each of the selector circuits for outputting one of first and second pairs of voltages in accordance with the display data, the first pair being two voltages equal to a same one selected from among the Q different gray-scale voltages, the second pair being two different voltages selected from among the Q different gray-scale voltages, and plural amplifiers corresponding to the video lines, each of the amplifiers for outputting the video signal voltage to a corresponding one of the video lines based upon one of the first and second pairs of voltages or a voltage intermediate between the second pair of voltages and produced from the second pair of voltages in the amplifiers.
摘要:
A liquid crystal display device in which bump electrodes of a semiconductor chip included in a video signal line driving circuit are disposed over noise-absorbing protective diodes so that the area occupied by the semiconductor chip is decreased to reduce the size of the video signal line driving circuit.