Hitachi, Ltd.

Hitachi Device Engineering Co., Ltd.

Hitachi Displays, Ltd.

Other

Kaoru Hasegawa

Yoshihiro Imajo

Katsuhiko Yarita

Yoshio Toriyama

Hironori Kondo

Masahiko Suzuki

Naoto Kobayashi

Kengo Kobayashi

Youichi Igarashi

Hiroyuki Mano

Terumi Takashi

Shinzo Matsumoto

Kazuhiro Fujisawa

Mitsuhisa Fujita

Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel.A liquid crystal display device includes a liquid crystal display panel, a light guide plate, a fluorescent tube, and a lamp reflector. First and second lamp cables of different length are connected to the fluorescent tube. One end of the fluorescent tube is inserted in a hole of a first rubber bush and a part of the one end of the fluorescent tube is connected to the first lamp cable in the hole of the first rubber bush and an other end of the fluorescent tube is inserted in a hole of a second rubber bush and a part of the other end of the fluorescent tube is connected to the second lamp cable in the hole of the second rubber bush. The first and second lamp cables are extracted from a same place of a mold case.

Liquid crystal display device having a mold case and rubber bushes for receiving ends of a fluorescent tube enabling connection of lamp cables thereat

Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel.A liquid crystal display device includes a liquid crystal display panel, a light guide plate, a fluorescent tube, and a lamp reflector. First and second lamp cables of different length are connected to the fluorescent tube. One end of the fluorescent tube is inserted in a hole of a first rubber bush and a part of the one end of the fluorescent tube is connected to the first lamp cable in the hole of the first rubber bush and an other end of the fluorescent tube is inserted in a hole of a second rubber bush and a part of the other end of the fluorescent tube is connected to the second lamp cable in the hole of the second rubber bush.

Liquid crystal display device having rubber bushes for receiving ends of a fluorescent tube and enabling connection of lamp cables thereat

Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel.

Liquid crystal display device video having signal driving circuit mounted on one side

Liquid crystal display with casing structure

Liquid crystal display unit

A frame area of a liquid crystal display device is reduced by improving the layouts of extraction lines DTM of drain wiring of a TFT liquid crystal display device, a driving IC of the TFT liquid crystal display device and a flexible board FPC for a drain driving circuit of the TFT liquid crystal display device.

Liquid crystal display device having smaller frame area

A liquid crystal display device includes a liquid crystal display element having a liquid crystal layer sandwiched between a pair of upper and lower substrates, a flexible circuit board disposed around a periphery of the liquid crystal display element, an illuminating light source having a line light source, a light guide and a reflector and disposed behind the liquid crystal display element, a metal upper case having a sidewall bent back and a display window, a resin lower case for housing the illuminating light source. The upper and lower cases are clamped by crimping plural nails formed in the sidewall of the upper case at an outer surface of the lower case after stacking the liquid crystal display element, the flexible circuit board and the illuminating light source between the upper and lower cases. An electrical connection between the upper case and a grounding pattern formed on the flexible circuit board is made by at least one component in chip form having a conductive region and being attached to a portion of the grounding pattern bent over the lower substrate, and a metal tape having one end thereof being interposed between opposing portions of the upper and lower cases which are pressed against each other and the other end thereof being positioned to be pressed against the conductive region of the at least one component.

Liquid crystal display device with its upper and lower cases clamped by crimping portions thereof

A liquid crystal display device includes a liquid crystal display panel in which pixels are arranged in rows and columns. Each of the pixels includes a pixel electrode, and a thin-film transistor having a gate electrode and a drain electrode. Gate signal lines arranged in the rows are connected to the gate electrodes of the thin-film transistors. Drain signal lines arranged in the columns are connected to the drain electrodes of the thin-film transistors. The liquid crystal display device further includes a gate drive circuit for driving the gate signal lines, and a drain drive circuit for driving the drain signal lines. The drain drive circuit receives a plurality of grey-scale reference voltages from an external circuit, interpolates a plurality of intermediate voltages between each pair of adjacent ones of the grey-scale reference voltages, selects voltages from the grey-scale reference voltages and the intermediate voltages, and applies the selected voltages to the drain signal lines. V,is a grey-scale reference voltage corresponding to a minimum grey-scale level, Vm is a grey-scale reference voltage corresponding to a maximum grey-scale level, and Vi is a grey-scale reference voltage that is nearest to a voltage level (Vm&plus;V,)/2. A number of intermediate voltages interpolated between V(i&minus;1) and Vi is different from both a number of intermediate voltages interpolated between V,and V,, and a number of intermediate voltages interpolated between V(m&minus;1) and Vm.

Low power driving method for reducing non-display area of TFT-LCD

Liquid crystal display device video having signal driving circuit

A liquid crystal display device includes a drain drive circuit for driving drain signal lines of a liquid crystal display panel. The drain drive circuit receives a plurality of grey-scale reference voltages from an external circuit, interpolates a plurality of intermediate voltages between each pair of adjacent ones of the grey-scale reference voltages, selects voltages from the grey-scale reference voltages and the intermediate voltages, and applies the selected voltages to the drain signal lines. V0 is a grey-scale reference voltage corresponding to a minimum grey-scale level, Vm is a grey-scale reference voltage corresponding to a maximum grey-scale level, and Vi is a grey-scale reference voltage that is nearest to a voltage level (Vm+V0)/2. A number of intermediate voltages interpolated between V(i-1) and Vi is greater than both a number of intermediate voltages interpolated between V0 and V1, and a number of intermediate voltages interpolated between V(m-1) and Vm.

Liquid crystal display device having video signal driving circuit

An apparatus for driving a color display panel operating at a high frame frequency. The color display panel driving apparatus includes a line memory for storing data of 1/2 of a line at its odd-numbered addresses and then storing data of the remaining 1/2 of the line at its even-numbered addresses, a first column drive circuit including a shift register to which the data stored at the odd-numbered addresses of the line memory are supplied and which is connected at its bit outputs to column-direction signal wires associated with a left-hand half display area of the display panel, and a second column drive circuit including a shift register to which the data stored at the even-numbered addresses of the line memory are supplied and which is connected at its bit outputs to column-direction signal wires associated with a right-hand half display area of the display panel. After picture data of one line are completely stored in the line memory, the picture data are substantially simultaneously supplied from the odd-numbered and even-numbered addresses of the line memory to the first and second column drive circuits respectively.

Growing community of inventors

Ichinomiya-machi, Japan

Kaoru Hasegawa