Abstract: A surface light source device which illuminates a transmission-type liquid crystal display unit from the back surface includes P×Q surface light source units with individually controlled light sources. Each of the light sources includes a plurality of light-emitting element units. Each of the light-emitting element units includes at least one red light-emitting element that emits red light, at least one green light-emitting element that emits green light, and at least one blue light-emitting element that emits blue light. The center of mass of a luminance profile based on each of a plurality of red light-emitting elements, a plurality of green light-emitting elements, and a plurality of blue light-emitting elements in each surface light source unit substantially coincides with the center of mass of the surface light source unit.

Abstract: A display apparatus includes a display unit having a display screen divided into a plurality of regions and controlled using an aperture ratio on a pixel-by-pixel basis, a backlight including a plurality of sets of light sources, each set being disposed so as to correspond to one of the regions, and a control unit for detecting display luminance in each region, computing the emission luminance of each light source on the basis of the detected display luminance while taking into account an effect on the region of the other light sources not corresponding to the region, and computing a correction value for each pixel on the basis of a shift amount between the set emission luminance and an optimal display luminance for one of the regions, and delivering a display driving signal generated on the basis of the correction value to each pixel so as to control the aperture ratio.

Abstract: A liquid crystal cell substrate 109, a plasma cell substrate 104, a dielectric layer 103 provided between the liquid crystal cell substrate 109 and the plasma cell substrate 104, a liquid crystal layer 110 provided between the liquid crystal cell substrate 109 and the dielectric layer 103, and a plurality of plasma channels 106 provided between the dielectric layer 103 and the plasma cell substrate 104, are provided. Each of the plurality of plasma channels 106 includes a discharge gas, an anode 107 and a cathode 108, and the cathode 108 includes a cathode layer 108a made of a mixture of a conductive material and an insulative material including a glass having a lead weight percentage of 30% or less.

Abstract: A plasma address display apparatus is composed of a flat panel, a scanning circuit, and a signal circuit. The flat panel has a layered structure wherein a plasma cell having scanning electrodes disposed in rows and a display cell having signal electrodes disposed in columns are placed one on the other. The scanning circuit successively applies a selection pulse to the scanning electrodes to effect scanning of the display cell. The signal circuit supplies image data to the signal electrodes in synchronism with the scanning to write the image data for individual scanning lines. The plasma cell has discharge channels formed in rows such that they are isolated from each other, and a plurality of scanning electrodes are allocated to each of the discharge channels. The scanning circuit successively applies a selection pulse to the scanning electrodes allocated to a discharge channel to cause discharge to occur so that, for example, at least two scanning lines are formed in each one discharge channel.

Abstract: A plasma addressed display device includes a flat panel, a scanning circuit and a signal circuit. The flat panel is of a superimposed structure of a plasma cell having scanning electrodes in a row configuration and a display cell having scanning electrodes in a column configuration. The scanning circuit sequentially applies selection pulses to the scanning electrode to scan the display panel. The signal circuit writes the picture data in the signal electrode in synchronism with this scanning. On the plasma cells, there are formed reciprocally isolated discharge channels in a row configuration. To each discharge channel, charged with an electrically dischargeable gas, are allotted plural scanning electrodes. As characteristic of the present invention, the scanning circuit sequentially applies the selection pulses to the scanning electrode allotted to a sole discharge channel to produce electrical discharge to form at least two scanning lines to a sole discharge channel.

Abstract: A plasma addressing display device comprising a flat panel including a display cell having columns of signal electrodes and also including a plasma cell having rows of discharge channels, with pixels formed at intersections of the signal electrodes and the discharge channels; a scanning circuit for sequentially discharging the columns of the signal electrodes at a pre-set period to select pixels from row to row; and a signal circuit for supplying picture signals to the column of the signal electrodes to write the picture signals in the pixels of the selected row, the scanning circuit discharging each discharge channel with time shift as the discharging period allocated to the discharge channel of a previous row is partially overlapped at least with the discharging period allocated to the discharge channel of the next row to allocate a discharging period longer than the pre-set period to each discharge channel.

Abstract: A plasma addressed liquid crystal display which includes a pair of spaced substrates upon which orthogonal electrodes are mounted and electro-optical material layer mounted in contact with a first group of electrodes on the first substrate and an ionizable gas between the substrate and the electro-optical material layer to provide a discharge region that functions as a visible display.

Abstract: A plasma address display apparatus is composed of a flat panel, a scanning circuit, and a signal circuit. The flat panel has a layered structure wherein a plasma cell having scanning electrodes disposed in rows and a display cell having signal electrodes disposed in columns are placed one on the other. The scanning circuit successively applies a selection pulse to the scanning electrodes to effect scanning of the display cell. The signal circuit supplies image data to the signal electrodes in synchronism with the scanning to write the image data for individual scanning lines. The plasma cell has discharge channels formed in rows such that they are isolated from each other, and a plurality of scanning electrodes are allocated to each of the discharge channels. The scanning circuit successively applies a selection pulse to the scanning electrodes allocated to a discharge channel to cause discharge to occur so that, for example, at least two scanning lines are formed in each one discharge channel.

Abstract: A liquid crystal cell substrate 109, a plasma cell substrate 104, a dielectric layer 103 provided between the liquid crystal cell substrate 109 and the plasma cell substrate 104, a liquid crystal layer 110 provided between the liquid crystal cell substrate 109 and the dielectric layer 103, and a plurality of plasma channels 106 provided between the dielectric layer 103 and the plasma cell substrate 104, are provided. Each of the plurality of plasma channels 106 includes a discharge gas, an anode 107 and a cathode 108, and the cathode 108 includes a cathode layer 108a made of a mixture of a conductive material and an insulative material including a glass having a lead weight percentage of 30% or less.

Abstract: A display apparatus includes a pair of substrates connected to each other via a pre-set gap for delimiting a hermetically sealed space, an ionizable gas charged into this space, and discharging electrodes formed at least on one of the substrates to incur discharge in the space. The discharging electrodes are coated with a protective skin film formed by the electro-deposition method. The protective skin film is an electro-deposited and sintered mixture of boride or carbon containing electrically conductive powders and glass powders. In electro-deposition, the mean particle size of the electrically conductive powders and the glass powders is not larger than 10 &mgr;m or in a range from 1 to 3 &mgr;m. The electrically conductive powders and the glass powders are mixed in a volumetric ratio in a range from 9:1 to 3:7, with the film thickness of the protective skin film being in a range from 1 to 20 &mgr;m.

Abstract: Disclosed is a plasma addressed display device characterized in that a plurality of scanning electrodes are formed in each discharge channel, wherein discharge is generated by applying selective pulses in sequence to the plurality of scanning electrodes allocated to each discharge channel, whereby each of the number of the scanning electrodes and the number of partition walls can be reduced in at least half to thereby enhance the opening ratio, as compared with a related art plasma addressed display device.

Abstract: A display device comprising a display panel, a plasma driving circuit, a correcting circuit and a display driving circuit. The display panel has a laminated structure consisting of a display cell with signal electrodes arrayed in columns, a plasma cell with discharge channels arrayed in rows, and a dielectric sheet interposed therebetween. The plasma driving circuit sequentially drives the discharge channels to address the display cell line-sequentially via the dielectric sheet, and the correcting circuit processes picture signals through a corrective arithmetic operation. And the display driving circuit supplies the processed picture signals to the signal electrodes in synchronism with the line-sequential addressing, and then writes the picture signals in pixels prescribed at the intersections of the signal electrodes and the discharge channels. The correcting circuit executes such a process as to emphasize the difference between the picture signals supplied to mutually adjacent signal electrodes.

Abstract: A plasma addressed display system with a flat panel structure comprising a display cell for displaying an image through modulation of incident light in accordance with an image signal, and a plasma cell joined to the display cell for scanning the same. The plasma cell has discharge channels arrayed in rows and generates discharges in succession to scan the display cell line sequentially. The display cell has signal electrodes arrayed in columns, and forms pixels at intersections with the discharge channels. The display cell applies an image signal in synchronism with the line sequential scanning and modulates the incident light per pixel. Pixels of two rows are defined in the discharge channel of one row.

Abstract: To improve the structure of discharge electrodes formed in a discharge panel, improve the effective screen surface rate and increase productivity, a discharge panel 2 is constituted by a pair of substrates 3 and 8 bonded together with a gap and ionizable gas sealed within the gap space. Discharge electrodes 9 having a stripe pattern are formed on the lower substrate 8 and barrier ribs 10 runnig parallel with the discharge electrodes 9 are formed on the lower substrate 8 so as to divide the gap space in such a manner as to define discharge channels 12. A part of each of the discharge electrodes 9 is covered by the corresponding barrier rib 10 whereas the remaining part thereof is exposed within the discharge channel 12.

Abstract: A plasma addressed display is intended to improve structures of electrodes and barrier ribs for stabilizing the discharge characteristics and enhancing the yield and the image quality. The plasma addressed display has a flat panel structure in which a display cell is laminated on a plasma cell. The plasma cell has discharge channels sequentially arranged along the scanning direction. The display cell is joined to the plasma cell, and it has signal electrodes sequentially arranged in the direction perpendicular to the scanning direction, and liquid crystal in contact with the signal electrodes. The plasma cell has a lower substrate joined to the display cell side, pairs of anode electrodes and cathode electrodes disposed in discharge channels, and barrier ribs formed on the substrate so as to partition the discharge channels from each other.

Abstract: A plasma addressed electro-optical display is disclosed which is capable of improving current resistance of discharge electrodes disposed below cover glass to be similar to that of discharge electrodes in an effective frame and which, therefore, is enabled to be free from disconnection the reliability to be improved.

Abstract: An electro-optical device has a first substrate having non-overlapping first electrodes on a major surface thereof and a second substrate opposed to the first substrate having non-overlapping second electrodes on a major surface thereof. The second electrodes are disposed substantially perpendicular to the first electrodes, and adjacent second electrodes are disposed at equal intervals. The electro optical device has an electro-optical material layer disposed between the first and second substrates. A discharge chamber is disposed between the electro-optical material layer and the second substrate and is filled with an ionizable gas. When this electro-optical device is applied to an image display device, the number of electrodes for attaining the same resolution can be reduced to one half. Thus, a bright image display is provided. Further, the electro-optical device may be if a structure such that partition walls are formed by the printing method on the second electrodes.

Abstract: A discharge panel (2) includes substrates (3, 8) bonded together with a gap and ionizable gas sealed within the gap. Discharge electrodes including an anode (9) and a cathode (9a) having a strip pattern are formed on the lower substrate (8) so as to divide the gap into discharge channels (12). A barrier rib (10) is disposed over each anode (9) covering one side wall of the anode (9) so that a portion is exposed to the ionizable gas in the discharge channel (12). The cathodes (9a) are free of the barrier ribs (10) and are exposed to the ionizable gas in the discharge channel (12). The elimination of barrier ribs (10) from the cathodes (9a) increases the effective display region. In an alternate embodiment, the barrier ribs (10), the anodes (9) and a cathodes (9a) are of the same width and same pitch, and provide for a simplification in the manufacturing process.

Abstract: To normally display an image and prevent open circuiting of drive circuits by optimizing power supplying sequences upon turn-on and turn-off of a back light of a plasma addressed display panel, a plasma addressed display panel 1 having a laminated structure of a liquid crystal cell and a plasma cell is provided, wherein the liquid crystal cell includes signal electrodes 4 arranged in columns and the plasma cell includes discharge channels 4 arranged in rows. Upon turn-off of the power switches, the supply of power to the plasma drive circuit 2 is stopped after the supply of power to the liquid crystal drive circuit 2 is stopped. Moreover, the supply of power to the drive circuits 2, 3 is stopped after a back light 8 is turned off. Upon turn-on of the power switches, the supply of power to the plasma drive circuit 2 and the liquid crystal drive circuit 3 is started after the supply of power to a control circuit 7 is started to enable the control circuit 7.

Abstract: A plasma addressed liquid crystal display device which includes a flat panel composed of a liquid crystal cell having signal electrodes in a column superposed on a plasma cell having discharge channels in a row.