361results about How to "Reduce brightness unevenness" patented technology

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.

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 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.

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.

In a backlight device according to the present invention including a light emitting diode substrate, which has a light emitting diode and is placed on the back side of a panel module having an image display surface on the front side, and a reflection sheet for reflecting light emitted by the light emitting diode to the panel module, the reflection sheet is placed on the front side of the light emitting diode substrate, and the reflection sheet is provided with a through-hole into which the light emitting diode is inserted, so as to reduce brightness unevenness and color unevenness on the image display surface resulting from the light emitting diode substrate.

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.

The invention discloses an organic light emitting diode circuit and a driving method thereof. The organic light emitting diode circuit comprises a storage unit, a transistor, a coupling capacitor, a compensation unit, an input unit, a switching unit, and an organic light emitting diode. The transistor is used to drive a second end of the transistor by voltage stored by the storage unit, so as to generate driving current. The coupling capacitor changes potential of the second end of the transistor. The compensation unit makes potential of the second end of the transistor change according to a first scanning signal. The input unit transmits data voltage to the storage unit according to a second scanning signal. The switching unit is connected according to a lighting signal, so that the driving current is transmitted to the organic light emitting diode through the switching unit.

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.

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 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.

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.

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.