Panasonic Liquid Crystal Display Co., Ltd.

Hitachi Displays, Ltd.

Japan Display Inc.

Sachiko Yamazaki

Ikuko Imajo

Masashi Baba

Kikuo Ono

Ryutaro Oke

Yoshihisa Ooishi

Genshiro Kawachi

Hideyuki Nakanishi

Daisuke Kajita

Kuniaki Amano

Katsunori Kanno

A display device comprises: data lines extending in a first direction; gate lines extending in a second direction, and being divided into groups each of which has the gate lines adjacent in the first direction; selection signal supplying wirings each of which is provided in each group, and connected to each control electrode of the selector transistors corresponding to the group; gate voltage supplying wirings connected to the other conductive electrode of each of the selector transistors corresponding to the group; and wherein a gate driver supplies a second gate voltage having a voltage level lower than that of a first gate voltage to at least one of the gate voltage supplying wirings in each of the groups before supplying the first gate voltage in order to turn on a pixel transistor disposed in an intersection portion of the data line and the gate line.

Display device and drive method of the display device

A backlight includes light emitting diodes; a substrate on which light emitting diodes are mounted; and a reflection sheet. The surface on which the light emitting diodes are mounted of the substrate is opposed to a rear surface of the liquid crystal display panel. The liquid crystal display panel and the substrate each have a shape in which a common width in a first direction is longer than a width in a second direction, which is orthogonal to the first direction. The width of the substrate in the second direction is shorter than the width of the liquid crystal display panel in the second direction. The substrate is opposed to, while avoiding being opposed to both end portions of the liquid crystal display panel in the second direction, a central portion between the both end portions of the liquid crystal display panel.

Liquid crystal display device and television set

A display device includes a display portion having gate and source signal lines, and a plurality of pixels, a gate driver that outputs gate signals, a source driver that outputs source signals, and a controller that causes the display portion to display an image at a frame frequency. The controller sets the frame frequency to a first frame frequency Fwhen the image is a moving picture, and the controller sets the frame frequency to a second frame frequency Flower than Fwhen the image is a still picture. The gate driver outputs the gate signals to the gate signal lines in an aligned order of gate signal lines in a second direction when the frame frequency is F, and the gate driver outputs the gate signals to the gate signal lines in different order from the array order when the frame frequency is F

Reducing deterioration in display quality of a displayed image on a display device

In a liquid crystal display device including a backlight unit that irradiates the entire image formation region with light from light emitting diodes disposed in a concentrated manner, in order to reduce warpage of a reflection sheet to obtain uniform illumination, provided is a liquid crystal display device (), including: a liquid crystal panel (); a reflection sheet (), which is disposed on a rear surface side of the liquid crystal panel () and is curved so as to have a concave surface facing the liquid crystal panel (); a light emitting diode substrate on which a plurality of light emitting diodes () are disposed along a horizontal direction; and a support () for fixing the reflection sheet () at a curved portion of the reflection sheet ().

Liquid crystal display device

A backlight unit has a light source area. The width of the light source area in a first direction is shorter than the width of a liquid crystal panel in the first direction. A plurality of LED modules () are arranged along the second direction perpendicular to the first direction. End lenses (A,B) and a middle lens () for enlarging a light divergence angle are disposed on the plurality of LED modules (). The direction in which the end lens (A,B) enlarges the light divergence angle differs from that in which the middle lens () enlarges the divergence angle. This structure can reduce difference in brightness of the liquid crystal panel, while reducing the number of light sources.

Backlight unit and liquid crystal display device having the same

Provided is a liquid crystal display device, including: a liquid crystal panel having a display region; and a backlight unit disposed below the liquid crystal panel, in which: the backlight unit includes: at least one mounting substrate on which light emitting diodes are mounted; a radiator plate; and a reflection member; the reflection member has a reflection surface which is formed to have a recess surface shape; the light emitting diodes on the at least one mounting substrate are disposed on a bottom portion of the reflection surface; the at least one mounting substrate is disposed at a position under the bottom portion; the radiator plate is disposed under the at least one mounting substrate; and the radiator plate has, in plan view, a larger area than the at least one mounting substrate and a smaller area than the display region.

In a liquid crystal display device including a liquid crystal display panel, and a backlight disposed on the rear surface of the liquid crystal display panel, the backlight is provided with a plurality of white light-emitting diodes arranged in a plane opposing the liquid crystal display panel. Based on a chromaticity coordinate value representing a color of emission identified for each of the white light-emitting diodes, the white light-emitting diodes are selectively combined for arrangement in proximity in such a manner that the color of emission as a result of averaging over the white light-emitting diodes () to be arranged in proximity takes a predetermined value of chromaticity coordinates. Accordingly, the resulting liquid crystal display device can offer, although using the white light-emitting diodes having the problem of impairing the uniformity of the color of emission, higher-quality display images using a backlight with less non-uniformity of color and light emission as a whole, and prevents the increase of the manufacturing cost.

An object of the present invention is to provide a backlight for a liquid crystal display device which is easy to repair and prevents the brightness from lowering on the screen, and thus can provide high-quality images, where the region where point light source elements are aligned is divided into a number of smaller regions, and backlight units are provided so as to correspond to the respective smaller regions, as well as a liquid crystal display device using the same. The present invention provides a backlight for a liquid crystal display device where a number of point light source elementsare aligned in a plane, having: a number of backlight units, each of which is formed of a support substratefor supporting point light source elementsand point light source elementsarranged on the support substrate, the region in which the point light source elements are aligned being divided into a number of smaller regions, each of which having a backlight unit; and a reflective sheet provided on the support substrates of the backlight units, having openings created at points where the point light source elements are located, characterized in that the reflective sheet is formed of a number of sheetsand covers the entire region.

Backlight for liquid crystal display device and liquid crystal display device using the same

A liquid crystal display device includes a liquid crystal display panel and a backlight. The backlight includes: a light emitting diode substrate on which light emitting diodes are mounted; a reflection sheet that is provided on the light emitting diode substrate and has holes formed therein, each of the light emitting diodes being provided inside each of the holes; and lenses provided on the light emitting diodes, for diffusing light from the light emitting diodes. Each of the lenses is larger than the each of the holes, and entirely covers the each of the holes and also covers a part of the reflection sheet including an entire periphery of the each of the holes.

Growing community of inventors

Mobara, Japan

Sachiko Yamazaki