35results about How to "Luminance is deteriorated" patented technology

An element structure is provided in which film formation irregularities and deterioration of an organic compound layer formed on an electrode are prevented in an active matrix light emitting device. After forming an insulating film so as to cover edge portions of a conductor which becomes a light emitting element electrode, polishing is performed using a CMP (chemical mechanical polishing) method in the present invention, thus forming a structure in which surfaces of a first electrode and a leveled insulating layer are coplanar. The film formation irregularities in the organic compound layer formed on the electrode can thus be prevented, and electric field concentration from the edge portions of the electrode can be prevented.

A display element drive circuit includes a first circuit which holds as a voltage component electric charges based on a gradation signal corresponding to display data, a second circuit which supplies the gradation signal to the electric charge holding circuit at a timing of application of a selection signal, current control type display elements, and a third circuit which generates a driving current based on the voltage component held in the first circuit and supplies the generated driving current to the display element. One of the second and third circuits includes at least one field effect transistor. The field effect transistor includes gate, electrode and drain electrodes, and a source-side parasitic capacitance formed between the gate and source electrodes and a drain-side parasitic capacitance formed between the gate and drain electrodes of the field effect transistor have different capacitance values.

At least one of right and left image display apparatuses is provided with an optical axis adjustment mechanism. The optical axis adjustment mechanism changes relative positional relationship between an image displayed on a display device and an ocular optical system in a direction intersecting an optical axis to thereby adjust an angle formed by a pair of right and left optical axes. In this condition, a light source is so arranged as to be substantially conjugate with an optical pupil. The optical axis adjustment mechanism changes the positional relationship described above without changing a position of the optical pupil relative to the ocular optical system. This permits, even when the apparatus is originally designed such that light intensity is high at a designed optical pupil position, achieving the light intensity at this optical pupil position even after optical axis adjustment. Moreover, since the position of the optical pupil relative to the ocular optical system is not changed through the optical axis adjustment, image light can be guided to the optical pupil by utilizing a portion of the ocular optically system designed so as to suppress occurrence of aberration.

A light emitting device capable of suppressing drop in luminance or luminance unevenness of a light emitting element due to deterioration of an electro luminescent material and capable of switching an image direction vertically to horizontally without a frame memory additionally provided. The light emitting device of the invention comprises in each pixel first to fourth transistors, a light emitting element, and a signal line. The first transistor and the second transistor control the connection between the signal line and a gate of the third transistor, the fourth transistor controls a current value supplied to the light emitting element, and the third transistor selects whether the current is supplied to the light emitting element or not. Further, the first transistor and the second transistor are switched separately.

The purpose of the present invention is to provide a light emitting device using an organic light emitting element and allowed to be driven stably with long lifetime. In a light emitting device having an organic light emitting device provided with an organic compound layer for obtaining light emission by applying a voltage between a first electrode and a second electrode, and means for applying a forward bias for emitting light from the organic light emitting device and a reverse bias of reverse polarity to the forward bias, the maximum voltage Vf of the forward bias is higher than the maximum voltage Vr of the reverse bias in an alternating current cycle formed of the forward bias and the reverse bias. At this time, the Vr is preferably a quarter of the Vf or higher than that. Additionally, the time Tr to apply the reverse bias in the alternating current cycle is preferably equal to or longer than the time Tf to apply the forward bias.

A display device includes: a panel portion, on which a plurality of sub-pixels with a discrete bus line form each individual pixel, the plurality of sub-pixels that form the individual pixel being sequentially arranged in a horizontal and a vertical direction, the panel portion displaying a two-dimensional image or a three-dimensional image by application of a signal via the bus line; and a filter portion, provided on a front surface of the panel portion, that alternately changes, for each of predetermined horizontal regions, a polarization state of light passing through the panel portion. A boundary of each of the horizontal regions of the filter portion is positioned within a range of a first sub-pixel of each of the plurality of sub-pixels. The first sub-pixel displays a different image when the two-dimensional image is displayed on the panel portion to when the three-dimensional image is displayed on the panel portion.

A light emitting device capable of suppressing drop in luminance or luminance unevenness of a light emitting element due to deterioration of an electro luminescent material and capable of switching an image direction vertically to horizontally without a frame memory additionally provided. The light emitting device of the invention comprises in each pixel first to fourth transistors, a light emitting element, and a signal line. The first transistor and the second transistor control the connection between the signal line and a gate of the third transistor, the fourth transistor controls a current value supplied to the light emitting element, and the third transistor selects whether the current is supplied to the light emitting element or not. Further, the first transistor and the second transistor are switched separately.

A plasma display panel of the present invention includes display electrodes and address electrodes that cross each other. The electrode to be covered with the first dielectric layer contains at least one selected from silver and copper. The first glass contains Bi2O3. The first glass further contains 0 to 4 wt % of MoO3 and 0 to 4 wt % of WO3, and the total of the contents of MoO3 and WO3 that are contained in the first glass is in a range of 0.1 to 8 wt %. The first glass may contain, as components thereof: 0 to 15 wt % SiO2; 10 to 50 wt % B2O3; 15 to 50 wt % ZnO; 0 to 10 wt % Al2O3; 2 to 40 wt % Bi2O3; 0 to 5 wt % MgO; 5 to 38 wt % CaO+SrO+BaO; 0 to 4 wt % MoO3; and 0 to 4 wt % WO3, and the total of the contents of MoO3 and WO3 that are contained in the first glass is in the range of 0.1 to 8 wt %.

An illuminating glass that is capable of shielding of ultraviolet radiation lying on the large wavelength side, for example, 313 nm, and exhibits high transparency. The illuminating glass is characterized by containing, by mass, 50-78% SiO2, 11-25% B2O3, 0-10% Al2O3, 3-20% Li2O+Na2O+K2O, 0-10% MgO, 0-10% CaO, 0-20% SrO, 0-20% BaO, 0-15% ZnO, 2.6-9% TiO2 and 0.001-5% AS2O3+Sb2O3.

An LED luminaire for normal or emergency lighting has a lamp section comprising a least one LED lamp, the LED lamp having an LED chip and a reflector section. The reflector section is formed of silver and is positioned to reflect light from the LED chip. A power section is coupled to supply power to the lamp section. A detector section has a silver-plated detector and is functional to detect sulfuration of the reflector section as a resistance value change. The power section is operable to adjust the power supplied to the lamp section upon detecting an increase in the resistance value at the silver-plated detector of the detector section.

An element structure is provided in which film formation irregularities and deterioration of an organic compound layer formed on an electrode are prevented in an active matrix light emitting device. After forming an insulating film so as to cover edge portions of a conductor which becomes a light emitting element electrode, polishing is performed using a CMP (chemical mechanical polishing) method in the present invention, thus forming a structure in which surfaces of a first electrode and a leveled insulating layer are coplanar. The film formation irregularities in the organic compound layer formed on the electrode can thus be prevented, and electric field concentration from the edge portions of the electrode can be prevented.

A plasma display panel of the present invention includes display electrodes and address electrodes that cross each other. The electrode to be covered with the first dielectric layer contains at least one selected from silver and copper. The first glass contains Bi2O3. The first glass further contains 0 to 4 wt % of MoO3 and 0 to 4 wt % of WO3, and the total of the contents of MoO3 and WO3 that are contained in the first glass is in a range of 0.1 to 8 wt %. The first glass may contain, as components thereof: 0 to 15 wt % SiO2; 10 to 50 wt % B2O3; 15 to 50 wt % ZnO; 0 to 10 wt % Al2O3; 2 to 40 wt % Bi2O3; 0 to 5 wt % MgO; 5 to 38 wt % CaO+SrO+BaO; 0 to 4 wt % MoO3; and 0 to 4 wt % WO3, and the total of the contents of MoO3 and WO3 that are contained in the first glass is in the range of 0.1 to 8 wt %.

A phosphor improved against luminance deterioration with time under vacuum ultraviolet irradiation, a phosphor paste composition, and a vacuum ultraviolet excitation light emitting element high in luminance retaining rate and improved in luminance, are presented. An alkaline earth aluminate phosphor which is a phosphor represented by the formula a (M1-xEux)O.6Al2O3 (wherein M represents at least one alkaline earth metal element selected from the group consisting of Ba, Sr and Ca, and x and a satisfy 0<x<1 and O.9≦a≦1.8, respectively) and which has a wide-band peak over an angle region of diffraction angle (2θ) of from 28° to 31° in powder diffraction X-ray spectrum by CuKα1 characteristics X-ray, and a vacuum ultraviolet excitation light emitting element provided with a fluorescent layer made of the phosphor.

An LED luminaire for normal or emergency lighting has a lamp section comprising a least one LED lamp, the LED lamp having an LED chip and a reflector section. The reflector section is formed of silver and is positioned to reflect light from the LED chip. A power section is coupled to supply power to the lamp section. A detector section has a silver-plated detector and is functional to detect sulfuration of the reflector section as a resistance value change. The power section is operable to adjust the power supplied to the lamp section upon detecting an increase in the resistance value at the silver-plated detector of the detector section.

A plasma display panel of the present invention includes a display electrode (5) and an address electrode (10) that cross each other. At least one selected from the display electrode (5) and the address electrode (10) is covered with a first dielectric layer (6) containing first glass. The first glass contains Bi2O3, and the electrode that is covered with the first dielectric layer (6) contains at least one selected from the group consisting of silver and copper. The first glass further contains 0 to 4 wt % of MoO3 and 0 to 4 wt % of WO3, and the total of the contents of MoO3 and WO3 in the first glass is in a range of 0.1 to 8 wt %.

The present invention provides: a phosphor which can be combined with a blue LED to emit white light having a low color temperature as in the case where the phosphor is used singly, has a broad fluorescence spectrum, high light emission efficiency, and thermal / chemical stability, and rarely undergoes the deterioration in brightness at higher temperatures. This phosphor is represented by the general formula: Mx(Si,Al)2(N,O)3±y (wherein M independently represent Li or at least one alkali earth metal element; and x and y fulfill the requirement represented by the formulae: 0.52≦x≦0.9 and 0≦y≦0.3) wherein some of M are substituted by element Ce, and wherein the Si / Al atomic ratio is 1.5 to 6 inclusive, the O / N atomic ratio is 0 to 0.1 inclusive, 5-50 mol % of M's is Li, and 0.5-10 mol % of M is Ce.

An electroluminescent display device comprises subpixels each including a pixel driving circuit driven in accordance with an initialization period, a sampling period and a light emission period. The pixel driving circuit includes a light emitting diode, a driving transistor including a gate connected to a first node, a drain connected to a second node, and a source connected to a third node, a first switching circuit turned on for the initialization period, providing an initialization voltage to the first node and providing a fixed voltage to the third node, a second switching circuit turned on for the sampling period, applying a data voltage to the third node and providing the initialization voltage to an anode of the light emitting diode, and a light emitting control circuit controlled by an emission signal and turned on for the light emission period to provide a high potential voltage to the third node.

The present invention provides an evaluation method for evaluating whether a light-emitting element material to be evaluated is suitable for a host material or a guest material. By carrying out a first step of measuring absorption intensity of a light-emitting element material and a second step of irradiating the light-emitting element material with light for a predetermined period of time, repeatedly; thereby a change in absorption intensity with time is evaluated so that whether the light-emitting material is suitable for a host material or a guest material can be distinguished. The light emitted to the light-emitting element material preferably has a wavelength component which is absorbed by a skeleton which contributes to excitation of the light-emitting element material.

The present invention proposes a white organic electroluminescent element which is a multiunit element capable of emitting high intensity light that is important to a light source for lighting use, and can have an extended lifetime while suppressing deterioration in luminance. The organic electroluminescent element includes: a transparent electrode; and a first light-emitting unit including a blue fluorescent light-emitting layer containing a blue fluorescent light-emitting material; an intermediate layer; and a second light-emitting unit including a red phosphorescent light-emitting layer containing a red phosphorescent light-emitting material and a green phosphorescent light-emitting layer containing a green phosphorescent light-emitting material; and a reflecting electrode, wherein: the first and second light-emitting units are stacked having the intermediate layer interposed therebetween; and a film thickness (tR) of the red phosphorescent light-emitting layer and a film thickness (tG) of the green phosphorescent light-emitting layer satisfy a relation of 5*tR≦tG.

In a liquid crystal display according to an exemplary embodiment of the present invention, a shielding electrode applied with the same voltage as a common voltage and overlapping a data line is not formed. Instead, an opening is formed at a position corresponding to a data line disposed proximate to a sub-pixel charged with a relatively low voltage. In this manner, luminance deterioration of a liquid crystal display may be reduced or prevented, and a short defect between the shielding electrode and the data line may also be prevented.

An image projection apparatus includes a casing, a light source unit detachably mounted to the casing, a first connector having a first engagement member, disposed on a housing of the light source unit, a second connector having a second engagement member, disposed on the casing, and one or more supporters disposed at least one of the first connector and the second connector. The first connector is detachably engageable with the second connector. At least one of the first connector and the second connector is moveable in a direction substantially perpendicular to a connection direction of the first connector and the second connector. The one or more supporters guides one of the first engagement member and the second engagement member to the other one of the first engagement member and the second engagement member when engaging the first connector and the second connector.

An image processing device combines an image of a medium exposed to visible light and an image of the medium exposed to ultraviolet light so that parts printed with UV ink can be easily identified. A control device (image processing device) has an image acquisition unit that drives an image sensor -and acquires a first image by imaging the face a check when exposed to a visible first light, and acquires a second image by imaging the face of the check when exposed to an ultraviolet second light; a reverse image generating unit that generates a reversed second image by reversing light and dark in the second image; and a second synthesizing unit that generates a second synthesized image by combining the first image and the reversed second image. Because the reversed second image that is the reverse of the second image becomes an image that is light overall, a drop in the luminance and a drop in the contrast of the first synthesized image can be suppressed, and parts printed with UV ink are easily discerned.

A liquid crystal display includes: a substrate; a gate line disposed on the substrate; a storage voltage line disposed on the substrate and extending substantially parallel to the gate line; a data line disposed on the substrate; a reference voltage line disposed on the substrate and extending substantially parallel to the data line; first and second subpixel electrodes disposed in a pixel area; a first switching element connected to the gate line, the data line, and the first subpixel electrode; a second switching element connected to the gate line, the data line, and the second subpixel electrode; and a third switching element connected to the second subpixel electrode and the reference voltage line, wherein the storage voltage line and the reference voltage line are not connected to each other.

The present invention provides an evaluation method for evaluating whether a light-emitting element material to be evaluated is suitable for a host material or a guest material. By carrying out a first step of measuring absorption intensity of a light-emitting element material and a second step of irradiating the light-emitting element material with light for a predetermined period of time, repeatedly; thereby a change in absorption intensity with time is evaluated so that whether the light-emitting material is suitable for a host material or a guest material can be distinguished. The light emitted to the light-emitting element material preferably has a wavelength component which is absorbed by a skeleton which contributes to excitation of the light-emitting element material.