43results about How to "Avoid Brightness Variations" patented technology

An anisotropic scattering sheet comprising at least an anisotropic light scattering layer, wherein the anisotropic light scattering layer comprises a continuous phase and a dispersed phase which are different in refraction index from each other, the mean aspect ratio of the dispersed phase is more than 1, and the major axis directions of each dispersed phase are oriented to a given direction, and wherein the sheet is a heat-treated sheet. In the treatment, the heat-treating temperature may be not less than 70° C., and in the typical treatment, heat-treatment is conducted after the sheet is oriented by a monoaxial stretching through roll calendaring. The present invention ensures to provide an anisotropic scattering sheet stably usable for a long period of time without causing luminance unevenness.

A liquid crystal display device having includes a light guide plate having a surface thereof serving as an illuminating surface region opposite to a liquid crystal display panel, light sources mounted on a flexible printed-circuit board and provided on a side face of the light guide plate, an optical sheet member interposed between the liquid crystal display panel and the light guide plate. The side surfaces of the light guide plate with the light sources provided thereon have a ridge-like inclined surface formed thereon, when viewed from the illuminating surface, and the ridge-like inclined surfaces serve as a light-receiving surface with the light source arranged thereon.

A liquid crystal display device includes a timing controller generating a voltage compensation control pulse and a gate control signal, a voltage compensation signal generator generating a voltage compensation signal, the voltage level of which is gradually reduced during one frame period, in response to the voltage compensation control pulse, a power unit outputting a gate-on voltage to a plurality of gate lines by gradually increasing the level of the gate-on voltage in response to the voltage compensation signal, and a gate driver sequentially supplying the gate-on voltage to the plurality of gate lines in response to the gate control signal.

A light-emitting device includes: a plurality of light-emitting elements whose luminous energy is controlled according to a current value and a pulse width of a driving signal; a storage unit that stores first and second coefficients for every light-emitting element; a pulse width determining unit that determines the pulse width of the driving signal supplied to each light-emitting element on the basis of the first coefficient for the corresponding light-emitting element stored in the storage unit and a grayscale value designated for the corresponding light-emitting element by grayscale data; a current value determining unit that determines a current value of the driving signal supplied to each light-emitting element on the basis of the second coefficient for the corresponding light-emitting element stored in the storage unit; and a driving unit that supplies the driving signal having the current value determined by the current value determining unit within the pulse width determined by the pulse width determining unit to the corresponding light-emitting element. In the light-emitting device, a variation in the light emission characteristic of each light-emitting element when the pulse width is changed and the current value of the driving signal is fixed is different from a variation in the light emission characteristic thereof when the current value is changed and the pulse width of the driving signal is fixed, and the first and second coefficients stored in the storage unit are selected so that the peak light amount of the individual light-emitting elements when the same grayscale value is designated by the grayscale data are almost equal to one another and variations in the light emission characteristics of the plurality of light-emitting elements driven by the driving signals from the driving unit are substantially equal to one another.

A display device includes: a pixel array unit having pixels including a circuit configuration, in which a first electrode of an electro-optical element and a source electrode of a driving transistor are connected together, a gate electrode of the driving transistor and a source electrode or a drain electrode of a writing transistor are connected together, a holding capacitor is connected between the gate electrode and the source electrode of the driving transistor, and an auxiliary capacitor is connected between the first electrode and a second electrode of the electro-optical element, disposed on a substrate in a matrix shape, wherein, from one pixel of adjacent pixels to an area of the other pixel, the auxiliary capacitor of the one pixel is set to be disposed, and an electrode of the auxiliary capacitor that is disposed on the electro-optical element side is conductive with the second electrode of the electro-optical element.

Disclosed are a cold cathode fluorescent lamp, a container for receiving the same and a liquid crystal display device having the container. The lamp includes a lamp tube, a first electrode having a first end disposed inside the lamp tube and a second end disposed outside the lamp tube and a second electrode plated on an outer surface of the lamp tube. The cold cathode fluorescent lamp is easily coupled / separated to / from the container having a clip type power-supplying module in a clip-coupling manner. In addition, a shock absorbing member is installed at the clip type power-supplying module so as to absorb an impact applied to the cold cathode fluorescent lamp. A brightness non-uniformity between cold cathode fluorescent lamps can be prevented, a power consumption of the cold cathode fluorescent lamp can be reduced, and an assembling work and productivity are remarkably improved.

The image light entering the image take-out section is reflected by the first reflecting surface and the second reflecting surface in a two-stage manner. It is not only possible to make the light beam with a small total reflection angle out of the image light directly enter the side near to the light entrance section out of each of the reflecting units, but also to make the light beam with a large total reflection angle directly enter the side far from the light entrance section out of each of the reflecting units to thereby make it possible to take out the image light to the outside. Therefore, the image light is emitted as the effective virtual image light for the observer in the condition in which the brightness variation and the picture variation are prevented and a high light efficiency can be obtained.

A liquid crystal display device is provided which is capable of improving display quality of moving images. In the liquid crystal display device, every time a driving pulse voltage is generated by a backlight driving circuit in synchronization with a timing signal fed from a lighting timing control section and is applied to a backlight and a scanning signal is applied to each scanning electrode of a liquid crystal panel, the backlight is turned OFF during a period before completion of a response of each liquid crystal molecule to application of a display signal and is turned ON at time of the completion of the response. When displacement of each of the liquid crystal molecules is large and therefore the change in light transmittance is large, the backlight is turned OFF and, therefore, no change in luminance on a display screen occurs, as a result, contrast of images can be improved.

Disclosed is a method for manufacturing an organic EL display, which comprises: a step of preparing an organic EL panel that comprises a substrate and organic EL elements arranged as a matrix on the substrate, wherein each organic EL element has a pixel electrode arranged on the substrate, an organic layer arranged on the pixel electrode, a transparent counter electrode arranged on the organic layer, a protective layer arranged on the transparent counter electrode, and a color filter arranged on the protective layer, and a defect portion present in the organic layer in each organic EL element is detected; a step of destroying a region of the transparent counter electrode positioned above the defect portion by irradiating the region with laser light through the color filter; and a step wherein a region of the color filter positioned above the defect portion is removed.

A liquid crystal display device including a liquid crystal panel provided with plural gate lines to select a pixel and plural data lines to supply pixel data and a data driver dividing a single frame into plural fields and converting frame data into field data to supply the field data to the data line is provided. When the frame data has a tone change, the data driver performs correction to data of an odd-number field of the frame in a same direction as an increase / decrease direction of the tone change of the frame data, and performs correction to data of an even-number field of the frame in an opposite direction to the increase / decrease direction of the tone change of the frame data.

An imaging apparatus that images a photographic subject using an imaging device includes: a signal processing means for performing signal processing on an image signal of the photographic subject imaged by the imaging device and generating an exposure control signal; a photoelectric conversion device that detects an amount of light indicating the brightness under an environment where the brightness changes periodically; and a timing generating means for receiving the exposure control signal from the signal processing means when the amount of light detected by the photoelectric conversion device reaches a predetermined value set beforehand and generating a timing signal for start of exposure and then supplying the timing signal to the imaging device.

The invention relates to an OLED (Organic Light Emitting Diode) pixel compensation circuit and an OLED pixel compensation method, seven thin film transistors, one compensation capacitor and one organic light emitting diode are adopted to form a 7T1C framework, and the driving time sequence of pixels is sequentially divided into four stages of resetting, compensation, data storage and light emitting. As the seventh thin film transistor is in a closed state in the reset, compensation and data storage stages, the organic light emitting diode does not emit light, and the seventh thin film transistor is in an open state in the light emitting stage, the current flowing through the organic light emitting diode is irrelevant to the threshold voltage and the driving voltage of the organic light emitting diode. By adopting the technical scheme, not only can threshold voltage drift of the driving thin film transistor be effectively compensated, but also brightness change caused by electrical deterioration of the organic light-emitting diode can be compensated, and the display quality of the organic light-emitting diode is improved.

The invention discloses an aurora motion characterization method for an unsupervised deep optical flow network, and the method comprises the implementation steps: 1, taking two adjacent preprocessed all-sky aurora images as input, and calculating a bidirectional optical flow through an optical flow network; 2, calculating a bidirectional warping image by using the all-sky aurora image and the bidirectional light flow; 3, reasoning a bidirectional deformation graph by using the bidirectional optical flow; 4, constructing a loss function by using the all-sky aurora image, the warping image and the bidirectional deformation image so as to optimize and train the optical flow network; and 5, after the training is completed, extracting a pixel-level aurora optical flow field of the aurora observation video by using the optical flow network as an aurora motion representation. The method solves the problem that the aurora data does not meet the brightness consistency assumption of the optical flow and lacks training data, has the advantages of high precision and strong robustness, and can be used for performing aurora event identification and detection from a complex aurora observation video.

The invention discloses a white LED step-up conversion system. The white LED step-up conversion system is characterized by mainly comprising a processing chip U, a diode D1, a field effect tube MOS, a constant current output circuit, an inductor L1 and the like, wherein the constant current output circuit is connected with a VOUT pin of the processing chip U; and one end of the inductor L1 is connected with an N electrode of the diode D1 and the other end passes through a resistor R5 and then is connected with a drain of the field effect tube MOS. A TPS61200 integrated chip is originally combined with a novel peripheral circuit, so that the condition that the white LED step-up conversion system can output constant current is ensured; constant current driving is provided for white LEDs; brightness changes of the white LEDs caused by a voltage change are avoided; and different white LEDs are consistent in brightness.

A light-emitting device includes: light-emitting elements whose luminous energy is controlled according to a current value and a pulse width of a driving signal; a storage unit that stores first and second coefficients for every light-emitting element; a pulse width determining unit that determines the pulse width of the driving signal supplied to each light-emitting element on the basis of the first coefficient, a current value determining unit that determines a current value of the driving signal supplied to each light-emitting element on the basis of the second coefficient, a driving unit that supplies the driving signal having the current value determined by the current value determining unit within the determined pulse width determined, to the light-emitting element, and a coefficient determining unit that calculates the first coefficient based on target values of a light amount and first peak light amounts of one of the light-emitting elements, and calculates the second coefficient.