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Hidefumi Yoshida
Hidefumi Yoshida, Ebina JP
| Patent application number | Description | Published |
|---|---|---|
| 20110063554 | ALIGNMENT FILMS IN A LIQUID CRYSTAL DISPLAY DEVICE AND A METHOD OF MANUFACTURING THE SAME - A liquid crystal display device including a pair of substrates in a spaced relationship with one another. A pair of alignment films are provided, one alignment film being formed on each substrate such that the alignment films face one another. A liquid crystal layer, including plural liquid crystals, is inserted between the pair of alignment films, wherein the alignment films impart a given pre-tilt angle to the liquid crystals. The alignment films are composed of a material containing at least two types of polymers having a prescribed initial alignment and different alignment variation rates in response to ultraviolet ray irradiation. The pre-tilt angle being adjusted, without rubbing the alignment films, through ultraviolet exposure of the alignment films. | 03-17-2011 |
Hidefumi Yoshida, Kanagawa JP
| Patent application number | Description | Published |
|---|---|---|
| 20100110357 | Liquid crystal display device - The present invention provides a liquid crystal display device used as a display part of an electronic apparatus which exhibits high brightness and favorable display quality. The liquid crystal display device includes a pair of substrates which are arranged to face each other in an opposed manner; vertical-alignment type liquid crystal which is sealed between the pair of substrates; a plurality of pixel regions, each pixel region including a sub pixel having a pixel electrode on one substrate and a sub pixel having a pixel electrode on one substrate, a slit formed between the pixel electrodes; and a singular point control part which includes projecting portions which are formed on end portions of the pixel electrodes on the slit-side and controls singular points of the liquid crystal. | 05-06-2010 |
| 20110037915 | Liquid crystal display device - The invention relates to a liquid crystal display device and provides a liquid crystal display device which can achieve high display quality. A liquid crystal display device is provided with first and second TFTs each having a gate electrode connected to an nth gate bus line and a drain electrode connected to a drain bus line; a first pixel electrode connected to a source electrode of the first TFT; a second pixel electrode connected to a source electrode of the second TFT; a third TFT having a gate electrode connected to an (n+1)th gate bus line and a source electrode connected to the second pixel electrode; and a buffer capacitance portion having a buffer capacitance electrode which is formed in the same layer as the first and second pixel electrodes and is connected to a drain electrode of the third TFT and a buffer capacitance electrode connected to a storage capacitance bus line. The buffer capacitance portion establishes capacitive coupling between the drain electrode of the third TFT and the storage capacitance bus line. | 02-17-2011 |
Hidefumi Yoshida, Osaka JP
| Patent application number | Description | Published |
|---|---|---|
| 20100277680 | LIQUID CRYSTAL DISPLAY DEVICE TREATED BY UV IRRADIATION - A liquid crystal display device includes a pair of substrates, a liquid crystal between substrates and alignment layers disposed on the inner surface sides of the substrates. The alignment layer is made from a material including polyamic acid containing a diamine component and polyimide containing a diamine component different from the diamine component of the polyamic acid. The alignment layer is subjected to alignment treatment by irradiation of light. UV light can be irradiated in the oblique direction onto the alignment layer through a mask having openings. A reflecting plate can be arranged between a UV light source and the mask. Also, bank structures having a thickness from 0.1 to 0.15 μm can be provided on the alignment layer of the TFT substrate. | 11-04-2010 |
Hidefumi Yoshida, Tokyo JP
| Patent application number | Description | Published |
|---|---|---|
| 20090262147 | Liquid crystal display apparatus - The present invention provides a liquid crystal display apparatus realizing an improved view angle characteristic of luminance and higher response speed. A sub-pixel group is provided with a plurality of sub-pixels. At the time of display driving on liquid crystal elements of each pixel, space-divisional-driving which allows each of the first and the second sub-pixels to be driven separately is performed. By the space-divisional-driving, fluctuations in the gamma characteristic in the case of seeing a display screen from an oblique direction are effectively dispersed, and the view angle characteristic of luminance improves. Area of the first sub-pixel is set to be smaller than whole area of the sub-pixel group. As a result, the drive voltage to be applied to the first sub-pixel at the time of lower gray level becomes high, and response speed improves. | 10-22-2009 |
| 20100118010 | LIQUID CRYSTAL DISPLAY DEVICE AND METHOD OF SUPPRESSING AFTERIMAGES - The invention relates to a liquid crystal display device including a first transistor, a plurality of sub-picture element electrodes formed in a picture element region, a control electrode formed in capacitance coupling with at least one of the plural sub-picture element electrodes, the control electrode being applied with a display voltage from the first transistor, and an auxiliary capacitance bus line held at a predetermined voltage level and constituting an auxiliary capacitance between the auxiliary capacitance bus line and the control electrode. A second transistor is provided between the sub-picture element electrode coupled with the control electrode by the capacitance coupling and the auxiliary capacitance bus line or between the sub-picture element electrode coupled with the control electrode by the capacitance coupling and the sub-picture element electrode connected to the first transistor. | 05-13-2010 |
Hidefumi Yoshida, Abiko-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20100046042 | IMAGE FORMING APPARATUS - An image forming apparatus includes a scanning unit which scans a light beam on a photosensitive member in accordance with image data, and a smoothing unit which performs a smoothing for a jaggy of a scan line of a light beam scanned on the photosensitive member by the scanning unit. The smoothing unit does not perform the smoothing when the scanning unit scans a light beam in accordance with image data representing a halftone image. | 02-25-2010 |
| 20110122215 | IMAGE FORMING APPARATUS - An apparatus includes a plurality of light-emitting sources configured to irradiate a photosensitive member in a sub scanning direction with a plurality of light beams scanned in a main scanning direction of the photosensitive member via an optical system, a conversion unit configured to convert image data into pixel data constituting a pattern that expresses a density with a plurality of pixels, and a drive unit configured to cause the plurality of light-emitting sources to emit light based on the converted pixel data, wherein, where a number of light-emitting sources is B and a number of pixels of the pattern in the sub scanning direction is M, the number B and the number M have a relationship such that the number M is not divisible by the number B or the number B is not divisible by the number N. | 05-26-2011 |
Hidefumi Yoshida, Ome JP
| Patent application number | Description | Published |
|---|---|---|
| 20090238581 | OPTICAL SIGNAL RECEIVING CIRCUIT - To solve problematic trade-off between a bandwidth and a in-band deviation in an optical signal receiving circuit of a gigabit order that is required to have a wide dynamic range, the optical signal receiving circuit has a current-voltage conversion circuit that receives as an input a current signal outputted from a photoelectric conversion circuit for receiving and converting an optical signal into a current signal and converts it into a voltage signal, and realizes the wide dynamic range by providing the current-voltage conversion circuit with an AGC function and a phase compensation function by MOS transistors and a capacitance. Further, by providing the current-voltage conversion circuit with a second phase compensation function by a MOS transistor and a capacitance, it is made possible for the optical signal receiving circuit to reduce the in-band deviation at the time of minimum gain while securing the bandwidth at the time of maximum gain. | 09-24-2009 |