116results about How to "Suppress brightness" patented technology

It is a problem to provide a light-emitting device capable of obtaining a constant brightness without being affected by deterioration in an organic light-emitting layer or temperature change, and of making desired color display. The lowering in OLED brightness due to deterioration is reduced by causing the OLED to emit light while keeping constant the current flowing through the OLED instead of causing the OLED to emit light while keeping constant the OLED drive voltage. Namely, OLED brightness is controlled not by voltage but by current thereby preventing against the change in OLED brightness due to deterioration of OLED. Specifically, the drain current Id of a transistor for supplying a current to the OLED is controlled in a signal line drive circuit thereby keeping constant the drain current Id without relying upon the value of a load resistance.

In an LED unit, all of eight LEDs are connected in series. The voltage of a power supply, that is, a battery of a vehicle, 12 V, is insufficient for the eight LEDs. To cope with this, a boosting circuit is provided within the control unit to boost the voltage to about 16 V which is then applied to the eight LEDs. The front end of the LED unit is connected to a constant-current circuit, and a voltage detection circuit is provided near and connected to this constant-current circuit for detecting the voltage applied to the constant-current circuit. The voltage detected by the voltage detection circuit is compared with a reference voltage drawn from the power supply, is amplified in an amplifier, and is input as a boosting control signal into the boosting circuit. The boosting control signal is output so as to regulate the boosted voltage in such a manner that the voltage detected in the voltage detection circuit is a lowest possible voltage.

The invention provides a light-emitting device and an electronic apparatus, which are capable of preventing reduction of the amount of current flowing through light-emitting elements and which have an excellent display characteristic. Cathode wiring lines connected to a cathode are provided to surround an effective area outside the effective area where a plurality of pixels having light-emitting elements are provided. First to third power source lines connected to pixel electrodes are provided between the cathode wiring lines and the effective area.

A method for driving a light-emitting device in which a plurality of pixel circuits are arranged in correspondence with the intersection of a plurality of scanning lines and a plurality data lines, the pixel circuit having a light-emitting element and a driving transistor that controls the current amount of a driving current flowing the light-emitting device, comprises repeating the process within unit period including a first period and a second period following the first period, wherein the second period process includes selecting one scanning line of the plurality of scanning lines, and supplying and holding a data voltage corresponding to the luminance of the light-emitting element to a gate of the driving transistor via the data lines with respect to the plurality pixel circuits connected the selected scanning lines, and wherein the first period process includes selecting two or more scanning lines of the plurality of scanning lines, and correcting the unbalance of the driving current output from the driving transistor in the plurality of pixel circuits connected to the selected scanning lines.

An exemplary embodiment of the present invention discloses a light emitting diode (LED) driving device for an LED device having a plurality of LEDs, the driving device including a rectifying unit configured to receive an alternating current (AC) voltage and output a rectified voltage, and a driving control unit configured to drive the plurality of LEDs based on stored data by receiving the rectified voltage at a first period.

A hard-coated antiglare film, comprising a transparent plastic film substrate and a hard-coating antiglare layer containing fine particles on at least one surface of the transparent plastic film substrate, wherein an arithmetic average surface roughness Ra (μm) that is defined in JIS B 0601 (1994 version) is in the range of 0.05 to 0.15 μm in an uneven shape of a surface of the hard-coating antiglare layer, and the hard-coated antiglare film includes at least 80 convexities that exceed a roughness mean line of a surface roughness profile in a 4-mm long portion at an arbitrary location of the surface of the hard-coating antiglare layer.

The present invention provides a liquid crystal display device which includes a pixel electrode and a counter electrode in a pixel formed on a surface of a substrate which faces liquid crystal, the counter electrode is formed below an insulation film, and the pixel electrode is formed above the insulation film, wherein the counter electrode is formed over a whole area of a center except for a slight periphery of at least the pixel, the pixel electrode is constituted of separate pixel electrodes to which a video signal which is supplied to the pixel is inputted through the separate switching elements at the same timing, and the separate pixel electrodes are respectively formed of a plurality of electrodes and the respective electrodes are alternately arranged.

A control unit (16) is provided in a display device having a plurality of pixels and controls a display signal indicating gradation of the pixels. The control unit (16) includes a gradation correction portion (16b) that determines correction values for gradation values of each of the pixels indicated by the display signal in accordance with a drive frequency of the pixels.

A power source line 1 and a scanning line 3 are arranged on different wiring layers so as to be orthogonal to each other. In the wiring layer on which the scanning line 3 is arranged, a bypass line 111 is arranged on at least a part of a portion obtained by removing a planar position of the scanning line 3 from a planar position of the power source line 1. Contacts 121 and 122 establish electric connection between the power source line 1 and the bypass line 111. As described above, the bypass line 111 is connected to the power source line 1 in parallel, leading to decrease in resistance of the power source line 1 and suppression of unevenness in brightness at a display screen. Moreover, an additional manufacturing step for providing the bypass line 111 is unnecessary. Further, an aperture ratio is not reduced even when the bypass line 111 is provided. When the bypass line 111 is made wider than the power source line 1, a pixel circuit can be prevented from operating erroneously due to external light.

An organic light emitting display panel includes a base substrate; a light emitting device comprising a first electrode, a light emitting layer on the first electrode, and a second electrode on the light emitting layer; a base layer providing a base surface on which the first electrode is located; a supporting layer protruding from the base surface; a sub-electrode spaced from the first electrode, electrically connected to the second electrode, and located on the supporting layer; and a pixel definition layer on the base substrate so as to expose the first electrode and the sub-electrode.

In regard to a second direction (combination direction) that is turned back by a reflection at the time of light-guiding, a projective optical system has an emission opening width larger than an opening width of a third reflective surface, such that it is possible to prevent a partial deficiency of image light when the image light emitted from the projective optical system is incident to the third reflective surface from occurring, and thereby it is possible to prevent the occurrence of deficiency of an image or a large variation in brightness.

For the sake of realizing high throughput and high processing position accuracy in an ion beam apparatus, two kinds of ion beams for processing are prepared of which one is a focusing ion beam for high image resolution and an edge processing ion beam of large beam current for permitting a sectional edge portion to be processed sharply, whereby high processing position accuracy can be ensured even with a large current ion beam.

A circuit apparatus of an LED vehicle lamp is disclosed. The circuit apparatus includes an input unit, an LED unit and a current limiting unit. The LED unit includes at least one light-emitting device. Each light-emitting device includes at least one LED and a protection device. The protection device and each one LED are connected in parallel. The circuit apparatus of an LED vehicle lamp protects the element of the LEDs from being damaged, increases traveling safety and simplifies maintenance.

An organic light emitting display includes a base substrate, a driving transistor arranged on the base substrate, a first electrode electrically connected to the driving transistor, an organic light emitting layer arranged on the first electrode to generate a light, a second electrode arranged on the organic light emitting layer, an opposite substrate facing the base substrate and including micro-lenses to disperse the light generated by the organic light emitting layer, and a sub-electrode arranged on at least one of the micro-lenses, the sub-electrode making contact with the second electrode to be electrically connected to the second electrode.

The present invention provides a driving apparatus, method and system for a light emitting device, suitable for use in an active matrix organic light emitting diode (AMOLED) display, which has an adjustable reference voltage, so as to compensate for degradation in brightness due to LED materials decay.

A pixel circuit 10 is provided with TFTs 12 and 13 and an organic EL element 15 on a current path connecting a power supply line VPk and an electrode having a common potential Vcom. A display device 100 simultaneously performs initialization to pixel circuits 10 in a plurality of rows, simultaneously perform threshold detection to the pixel circuits 10 in the plurality of rows, sequentially writes data to the pixel circuits 10 row by row, and makes the organic EL elements 15 included in the pixel circuits 10 in the plurality of rows emit light in the same period. In a period from completion of threshold detection to start of light emission, the TFTs 11 and 13 are controlled to an off state, and a potential VP_C which is substantially equal to the common potential Vcom is applied to the power supply line VPk. Consequently, leak current flowing through the TFTs 12 and 13 can be suppressed, and the fluctuation in the node potential in the pixel circuit 10 in a standby period can be prevented.

Disclosed is a display device with a seamless display which allows display such that the viewer does not experience a feeling of discomfort or such feelings of discomfort are reduced. The display device is provided with: a display panel (2) wherein a plurality of display elements are arranged in matrix fashion and wherein a border region where the aforementioned display elements are not arranged is provided at the edge thereof; lightguide elements (4) provided on the aforementioned display panel (2) for guiding some of the light that is emitted from the aforementioned display elements onto the aforementioned border region by optical path conversion; an optical sensor (100) which is provided on the aforementioned display panel (2) and detects ambient illuminance; an image signal correction unit that outputs a corrected image signal by correcting an image signal that is supplied to the display elements of the region where the aforesaid lightguide elements (4) are provided in accordance with the detected ambient illuminance, so as to reduce the brightness of the display light of said image by means of the aforesaid lightguide elements (4), or so as to reduce the coloration thereof; and a drive unit that drives the aforesaid display elements in accordance with the aforesaid corrected image signal.

In order to dim the brightness of the mixed-color light from an LED light (11) with LED arrays (12r, 12g, 12b) which emit different colors, in particular in the passenger cabin of an airliner, the current-flow time intervals (tr, tg, tb) which can be adjusted such that they are different over the various arrays (12) are shortened in steps during initially constant working period lengths (ta).

After light from a planar light source is switched to scattered light or collimated light by a switching element, the light is incident on a display panel, and an image is displayed. At this time, the luminance of the planar light source is adjusted, the contrast voltage of the display panel is reset, and adjustment is performed so that the luminance and hue of the frontal image does not vary before and after switching.

A pixel circuit of a display device of the present invention has a drive transistor which serves also as a transistor adapted to control the emission and non-emission periods of an organic EL element or other elements. A final stage buffer in an output circuit of a write scan circuit (WS) has its power supply separated from the power supply of circuit portions of a previous stage. In a first embodiment, a scan signal WS from the write scan circuit is activated instantaneously. In a second embodiment, the trailing edge of the scan signal WS falls slowly. This allows for writing of an input signal voltage in a stable manner.

A hard-coated antiglare film that has superior antiglare properties, allow high definition to be provided even in the case of a low haze value, can prevent white blur in an oblique direction from occurring and, and can improve the depth of black in black display, as well as a polarizing plate, and the like. The hard-coated antiglare film includes a transparent plastic film substrate and a hard-coating antiglare layer containing fine particles, which is on at least one surface of the transparent plastic film substrate. The hard-coated antiglare film has a total haze value Ht in the range of 10% to 35%. The total haze value Ht and an internal haze value Hin satisfy a relationship of 0.5≦Hin / Ht≦0.9. The surface of the hard-coating antiglare layer has an uneven shape and an arithmetic average surface roughness Ra in the range of 0.1 to 0.3 μm. The hard-coated antiglare film includes: convexities that exceed a roughness mean line of a surface roughness profile; no convexities in which line segments of portions of the mean line that cross the convexities each have a length of 80 μm or longer, and convexities that exceed a standard line that is in parallel with the mean line and is located at a height of 0.1 μm; and at least 50 convexities in which line segments of portions of the standard line that cross the convexities each have a length of 20 μm or shorter in 4-mm long portion at an arbitrary location of the surface of the hard-coating antiglare layer.

The invention provides a base sheet for optical sheet having excellent antisticking properties, high total transmittance, capability of inhibiting interference phenomenon and uneven brightness, and high economical efficiency and membrane permeability, consisting of a transparent base film and an antisticking layer laminated on one surface of the base film, and characterized in that the antisticking layer has filling materials and resin binder; the average thickness of the flat part of the antisticking layer is more than 50nm and less than 15nm; the average grain diameter of the filling materials is more than 70nm and less than 200nm; the average grain diameter of the filling materials can be larger than the average thickness of the flat part of the antisticking layer; the content of the filling materials of the antisticking layer is preferably more than 20 mass percent and less than 50 mass percent; and bonder polymer can have a three-dimensional crosslinking structure.