366results about How to "Reduce brightness unevenness" patented technology

An LED lamp includes a lamp base, a heat sink mounted on the lamp base and a plurality of LED modules thermally contacting with the heat sink. The lamp base defines a plurality of vents therein. The heat sink includes a central cylinder and a plurality of fins spaced from and surrounding the cylinder. The cylinder defines a through hole therein, which communicates with the vents of the lamp base and cooperates with the vents to form an air passage communicating with ambient air. An included angle is defined between each of the fins and a central axis of the cylinder. The LED modules are mounted on outmost ones of the fins of the heat sink, respectively.

The present solution relates to a 2D / 3D data projector, which comprises: A data projector, the data projector comprising: at least one micro display having an image to be projected, at least one source unit comprising at least one light source chip and at least one beam forming component, each beam forming component comprising at least one diffractive element, and each source unit being designed to preserve etendue as far as possible, to minimize photon loss, to provide a desired projection shape and a uniform illumination onto the micro display, and a focusing optical unit for projecting the image of the micro display on a target.

A direct-type backlight device for a non-self-luminous image display panel has a light-emitting area corresponding to a display area of the image display panel. The light-emitting area is arranged by combining a plurality of backlight substrates each of which is provided with (i) a color sensor for detecting an incident light intensity and (ii) red, green, and blue LEDs whose respective light intensities are controlled in accordance with a detection result obtained by the color sensor. This arrangement allows reduction of brightness unevenness entirely in the light-emitting area of the backlight device.

A pattern inspection apparatus which compares images of regions, corresponding to each other, of patterns that are formed so as to be identical and judges that non-coincident portions in the images are defects. The pattern inspection apparatus is equipped with an image comparing section which plots individual pixels of an inspection subject image in a feature space and detects excessively deviated points in the feature space as defects. Defects can be detected correctly even when the same patterns in images have a brightness difference due to a difference in the thickness of a film formed on a wafer.

The present solution relates to a 2D / 3D data projector, which comprises: A data projector, the data projector comprising: at least one micro display having an image to be projected, at least one source unit comprising at least one light source chip and at least one beam forming component, each beam forming component comprising at least one diffractive element, and each source unit being designed to preserve etendue as far as possible, to minimize photon loss, to provide a desired projection shape and a uniform illumination onto the micro display, and a focusing optical unit for projecting the image of the micro display on a target.

A display has light emitting elements, a first driver, a power source, and a second driver. Each light emitting element includes “n” emission layers formed one over another to form a color dot in each pixel. The first driver drives the emission layers to emit light or no light. The power source passes a current through the first driver to the light emitting element. The second driver individually weights the n emission layers and makes the emission layers emit light so that each dot may express a gradation level.

A transistor circuit is provided including a driving transistor where conductance between the source and the drain is controlled in response to a supplied voltage, and a compensating transistor where the gate is connected to one of the source and the drain, the compensating transistor being connected so as to supply input signals to the gate of the driving transistor through the source and drain. In a transistor circuit where conductance control in a driving transistor is carried out in response to the voltage of input signals, it is possible to control the conductance by using input signals of a relatively low voltage and a variance in threshold characteristics of driving transistors is compensated. With this transistor circuit, a display panel that can display picture images with reduced uneven brightness is achieved.

The invention provides an endoscope having a scope that takes an image enlarged by driving a movable lens of an optical zoom mechanism by a CCD and displays an image of an object to be observed, wherein a multiplier multiplies RGB color signals by a coefficient set in view of light distribution of illumination light depending on focusing distances of the movable lens, thus eliminating uneven brightness resulting from varying light distribution depending on the focusing distances in enlargement photography. A red component cut filter for cutting a long wavelength side in a red band of the illumination light is provided in a light source unit to improve redness. Further, a coefficient for averaging a brightness signal for a predetermined number of pixels for each horizontal line is calculated, and this coefficient calculation may eliminate unevenness.

It is an object to manufacture a highly reliable backlight device with less color unevenness and less luminance unevenness, and a high-performance and highly reliable display device including the backlight device, which can display a high quality image. A light emitting diode (LED) is used as a light source of a backlight device and thermoelectric elements are provided in a chassis for holding the light emitting diode so as to surround the light emitting diode (the thermoelectric elements are provided under the light emitting diode and on the four sides thereof). A temperature in the backlight device is adjusted by cooling and heating by the thermoelectric elements.

A transistor circuit is provided including a driving transistor where conductance between the source and the drain is controlled in response to a supplied voltage, and a compensating transistor where the gate is connected to one of the source and the drain, the compensating transistor being connected so as to supply input signals to the gate of the driving transistor through the source and drain. In a transistor circuit where conductance control in a driving transistor is carried out in response to the voltage of input signals, it is possible to control the conductance by using input signals of a relatively low voltage and a variance in threshold characteristics of driving transistors is compensated. With this transistor circuit, a display panel that can display picture images with reduced uneven brightness is achieved.

An active-matrix substrate includes: scanning signal lines; data signal lines; first storage capacitor wires; second storage capacitor wires; and pixels, disposed at intersections between the scanning signal lines and the data signal lines, each of which includes a plurality of sub-pixels. Each of the data signal lines is split into two parts at a region where the number of scanning signal lines intersecting the data signal line is ½ of the total number of scanning signal lines. A data signal line split section is formed on a region that does not overlap the second storage capacitor wires. This makes it possible to provide an active-matrix substrate, a display device, and a television receiver in each of which a data signal line split into two parts and a storage capacitor wire are hardly electrically short-circuited in the case of a combination of a split-screen structure and a multi-pixel structure.

A planar light source device includes: a plurality of point light sources, each of which emits a light; a light guide plate that includes a first surface, and a second surface perpendicular to the first surface, and that is configured to guide the emitted lights incident from the first surface to be emitted from the second surface; a bottom case including a side portion substantially parallel to the first surface; a light source substrate that includes the plurality of point light sources arranged thereon at a predetermined interval, and that is arranged at a side of the first surface; a frame that sandwiches the light source substrate and the side portion of the bottom case and holds the second surface and that includes a plurality of gaps at positions facing the point light source.

The present invention reduces brightness unevenness at the periphery of a non-display region in a display device that uses an edge-type backlight by means of a display device (10) being provided with a liquid crystal panel (20), a light guide plate (31), which has the surface opposing the liquid crystal panel (20) as the light exit surface and one lateral surface other than the light exit surface and the surface opposite the light exit surface as the light entrance surface, a light source unit (32), which opposes the light entrance surface, and an opening (34) that pierces the light guide plate (31) from the light exit surface to the surface opposite the light exit surface, the configuration being such that the length (X) from the light entrance surface to the center of the opening (34) is at least 1 / 2 the length (L) from the light entrance surface to the lateral surface opposite the light entrance surface.

A light quantity control member includes a light diffusion part formed by light diffusion members for diffusing light from a LED. The light diffusion part includes a first rectangular area positioned at the center of light flux from the LED and second rectangular areas positioned around the first rectangular area. The first rectangular area has an occupied area of the light diffusion members larger than any other second rectangular areas. If respective distances between a first center of the first rectangular area and respective second centers of the second rectangular areas are equal to each other, the occupied areas of the diffusion members of the second diffusion areas become equal to each other. The longer the distance between the first center of the first rectangular area and the second center of the second rectangular area gets, the smaller the occupied area of the light diffusion members of the second rectangular area becomes.

A high-quality light-emitting device having low power consumption, capability of emitting light of a bright color, and less luminance unevenness is provided. Provided is a light-emitting device in which a plurality of light-emitting units each include a light-emitting element which includes a layer (EL layer) containing an organic compound between a first electrode and a second electrode. The first electrode is separated between light-emitting elements. The EL layer includes a layer (light-emitting layer) containing a light-emitting substance and a layer containing a donor substance and an acceptor substance provided between the first electrode and the light-emitting layer. An inversely tapered partition is provided only between adjacent light-emitting units emitting light of different colors.

A lighting device includes LEDs 17, a light guide plate 19, a reflection sheet 40, an exit light reflection portion 41 on a light exit surface 19a side of the light guide plate 19, opposite plate surface-side convex lenticular lens portions 44 and the flat portions 45 on the opposite plate surface 19c of the light guide plate 19. The occupied ratio of the opposite plate surface-side convex lenticular lens portions 44 with respect to the second direction is relatively low in a portion near the light entrance surface 19b in the first direction and is relatively high in a portion far away from the light entrance surface. The flat portions 45 have a relatively high occupied ratio to the opposite plate surface 19c with respect to the second direction in a portion near the light entrance surface 19b in the first direction and have a relatively low occupied ratio in a portion far away from the light entrance surface 19b.

A point light source is converted into a plane light source having a satisfactory uniformity. The point light source is converted into a line light source by means of a linear light guiding plate, and further into the plane light source by means of a plane-like light guiding plate. Light from the point light source is reflected at a lamp reflector to be incident on at least two side surfaces of the plane-like light guiding plate.

The method of manufacturing a light emitting module includes: providing a light guiding plate having a first main surface serving as a light emitting surface; and a second main surface positioned opposite to the first main surface and provided with a recess; providing a light adjustment portion containing a fluorescent material; providing a light emitting element unit in which a light emitting element comprising an electrode is integrally bonded to the light adjustment portion; bonding the light adjustment portion of the light emitting element unit to the recess; and forming wiring on the electrode of the light emitting element.

An organic light emitting display device capable of driving transistor threshold voltage compensation, including: pixels positioned in the intersections of scan lines and data lines, wherein each pixel comprises: a first transistor and a fourth transistor, connected at a common node, disposed between an anode of an OLED and a first power supply; a cathode of the OLED connected to a second power supply; a second transistor connected between a gate of the first transistor and a data line, and turned on when a scan signal is supplied to a scan line; a third transistor connected between the common node and the data line, and turned on when a scan signal is supplied to the scan line; a first capacitor connected between the gate of the first transistor and the anode of the OLED; and a second capacitor connected between the anode of the OLED and a predetermined voltage source.

The present invention provides a surface light source device capable of reducing luminance non-uniformity near point light sources and near between the point light sources adjacent to each other, and a display device of high display quality. The surface light source device includes: a plurality of LEDs arranged at a predetermined spacing; a light guide plate that emits, as a surface light, light emitted from the point light sources and entered into at least one side surface, through a light emission surface perpendicular to a light incident surface; reflecting sheets disposed respectively on a light anti-emission surface and near the LEDs in the light guide plate; and a casing having an opening part at a location corresponding to the light emission surface of the light guide plate, and holding the LEDs and the light guide plate and the reflecting sheets. The surface light source device further includes, near between the LEDs adjacent to each other, light introducing means for introducing the light emitted from the LEDs into the light emission surface or the light anti-emission surface.

A lighting device comprising:a light emitting module including a plurality of electrically connected light emitting bars each having a plurality of semiconductor light emitting devices;a chassis for containing the light emitting module and having a discharge opening;a reflection sheet arranged in the chassis; anda brightness nonuniformity reduction unit,wherein the light emitting bar includes:a band plate-shaped substrate;a wiring formed on one surface of the substrate;the plurality of semiconductor light emitting devices; andfirst and second connectors formed in proximity to opposing shorter sides on the one surface of the substrate,wherein the reflection sheet has at least a plurality of corresponding holes through which the plurality of semiconductor light emitting devices are inserted,and wherein the brightness nonuniformity reduction unit is arranged in proximity to a position of the first and second connectors of each light emitting bar.

In an LED lamp illumination projecting structure, an LED lamp includes a casing, an LED lamp set and a light transmitting lens. The casing has an LED lamp set with a base board mounted in the casing and several LED lamp connected to the base board, and the light transmitting lens is installed in the light projecting direction of the LED lamp set and sealed onto a side of the casing, and several pits arranged with an interval apart and formed on the internal surface at a position corresponding to the projected position of each LED lamp for collecting and emitting the light of each LED lamp through the pit, so as to provide a better directionality of the light of the LED lamp and an evener brightness for a projecting area.

This invention provides a surface-emitting display device comprising a plurality of power supply lines 21 connected to a plurality of pixel circuits, respectively, and a power supply bus 22 having a power supply terminal 23 and connected to end portions of the plurality of power supply lines 21 at a prescribed interval, the power supply bus 22 having one or more slits 71, 72 extending along the length direction thereof from the power supply terminal 23 toward the end portions.

Provided is a backlight unit capable of increasing luminance and of reducing unevenness in luminance. The backlight unit includes: a light diffusing member provided to cover a light emitting element mounted on a surface of a substrate; and a first light reflective member having a hole portion opened larger in size than an outer shape of the light diffusing member, the first light reflective member being provided on the surface of the substrate while having the light diffusing member protrude from the hole portion. In addition, a second light reflective member is further provided on the surface of the substrate, and the second light reflective member covers at least a part of a region corresponding to a gap left between the light diffusing member and the hole portion of the first light reflective member.

The invention provides an OLED display and a production method thereof. According to the production method of the OLED display, by means of photoresists in a shape of an inverted trapezium arranged inspacer areas of multiple sub-pixels, the effect that multiple OLED illuminating layers are not connected with one another is achieved, and the situation of lateral electric leakage of common layers does not happen to the obtained OLED display, so that the cross color phenomenon caused by migration of carriers between the adjacent sub-pixels is avoided, and it is guaranteed that the OLED display has a good display effect; moreover, by producing auxiliary negative electrodes which are connected with negative electrodes over or under the negative electrodes, the square resistance of the negativeelectrodes can be reduced, and then the problem of uneven brightness caused by voltage drops is solved. The OLED display is obtained by adopting the method, and the cross color phenomenon does not happen, so that the OLED display has a good display effect; the auxiliary electrodes which are connected with the negative electrodes are arranged over or under the negative electrodes, so that the square resistance of the negative electrodes is reduced, and then the problem of uneven brightness caused by the voltage drops is solved.