143results about How to "Same brightness" patented technology

In a display device including a backlight and a display panel, the area of the backlight is divided into a plurality of unit regions; the display panel includes pixels which are larger in number than the unit regions; a frame rate of image data input to the device is converted to perform display while part of the unit regions in which black is displayed is in a non-light emission state; and the driving frequency of the backlight is converted in accordance with the display.

A display panel is disclosed, having a display region and a non-display region out of the display region, wherein the display region comprises a central pixel region and a border pixel region disposed between the central pixel region and the non-display region, the display panel comprising: a first substrate; a second substrate; a display medium layer; a plurality of central pixel units located at the central pixel region and having a plurality of first electrodes disposed on the second substrate; and a plurality of border pixel units located at the border pixel region and having a plurality of second electrodes disposed on the second substrate; wherein outmost edges of a part of the adjacent border pixel units form a ladder-like shape, and a light output area of at least one of the border pixel units is smaller than that of at least one of the central pixel units.

A cold-cathode tube has hitherto been used as a backlight for supplying illumination to a liquid crystal television but recently, light emitting diode pieces have been used for a backlight of a large-size liquid crystal television. For the purpose of improving the emission efficiency, flip chip mounting of the light emitting diode piece is advantageous but the mounting yield is restricted by the piece size, electrode structure and wire pattern structure, facing situations having difficulties in realizing simplified mounting and reduction of costs of members. In a liquid crystal display apparatus having a liquid crystal panel, an optical system and a light source, the light source includes a light emitting element structure having positive and negative electrodes, at least one of them being plural, and wires mounted to the positive and negative electrodes through flip chip mounting by making electrical correspondence to individual regions of the positive and negative electrodes.

A system and method corrects luminance non-uniformity and increases the apparent amplitude resolution of an image generated by a projector. The projector, which has a given number of stated levels, receives input data and projects images based on that input data. To correct luminance non-uniformity, a projector correction look-up table (LUT) is created. The LUT attenuates the displayed image such that the whole image, assuming it has a uniform level, has the same luminance as the dimmest point. Input data received by the projector is modified by the correction information contained in the LUT. In addition, the output of the projector is analyzed to identify the number of unique levels that the projector is capable of producing, which may be less than the number of stated levels. A dithering engine is utilized to further modify the corrected image data to increase the projector's amplitude resolution, thereby creating the illusion that the projector has more than the limited number of unique levels that were identified.

The light array of this invention includes a number of columns and rows of LED's connected in a series/parallel combination. The series parallel combinations effectively optimize the impedance, accommodate failure rate, facilitate light mixing, provide a means of imbedding redundancy, and common cathodes or anodes. This arrangement provides a superior light source for consumer, industrial and specialty markets in respect to mean time between failure, process control, radiant intensity, wavelength mixing, power requirements and other characteristics of the light source. Each column includes a number of rows of plural LED's. The LED's in each row are wired in series and each column is wired in parallel so that if one LED fails only the LED's connected in series with the failed LED will also fail. There is redundancy in the circuit as well as the arrays so that if there are failures different current carrying elements or different series LEDS will automatically by powered on. The array may be connected in series with one or more LED arrays to form a module. Multiple modules may be connected in series with other multiple modules.

Discussed is an organic light emitting display device including a plurality of pixels, where red sub pixels and blue sub pixels of adjacent pixels are aligned in a first direction and are also aligned in a second direction, the second direction being a direction that intersects the first direction. Also, the green pixels of adjacent pixels are aligned in the first direction and are also aligned in the second direction. And the at least one green sub pixel of each pixel is disposed between the at least one red sub pixel and the at least one blue sub pixel of the each pixel, and the at least one green sub pixel is offset from the at least one red sub pixel and the at least one blue sub pixel in the first direction and the second direction in the each pixel.

The present invention is directed to a cholesteric liquid crystal display that includes a homogeneous alignment surface effective to provide increased brightness, low focal conic reflectance and/or reflected light that is to a significant degree circularly polarized. The homogeneous alignment surface substantially homogeneously aligns the liquid crystal director adjacent thereto. The homogeneous alignment surface may be disposed on one or both sides of a cell of the display. In the case of a cell in which the homogeneous alignment surface is disposed on only one side, the substrate with the inhomogeneous alignment surface may be upstream or downstream of the substrate with the homogeneous alignment surface relative to a direction of incident light. Also included especially in the case of a cell that has the homogeneous alignment surface on both sides is the use of a polarizer to provide very good brightness and low focal conic reflectance. Such a cell may employ an alignment layer material with a high pretilt angle. A stacked display may be produced including at least one cell with at least one homogeneous alignment surface. In particular, a stacked cell display may include a lower cell with two homogeneous alignment surfaces and an upper cell in which the top side has an inhomogeneous alignment surface and the bottom side has a homogeneous alignment surface. The present invention achieves any one or combinations of the above features through the use of the homogeneous alignment surface produced with a predetermined alignment layer material and predetermined alignment conditions. The invention also includes a method of making the inventive display and the stacked inventive display.

A light diffusion plate for increasing light diffusion and for increasing light brightness is prepared for arranging an optical lens and a diffusion layer at one side of base plate, setting said diffusion layer above said optical lens for intensifying diffusion effect, using a plane or micro-lens as light incoming surface at another side of said light diffusion plate. The prepared light diffusion plate can be used in back light module of LCD TV.

A semi-transmissive in-plane switching (IPS) mode liquid crystal display (LCD) panel, in which each pixel region can exhibit the same luminance in transmissive and reflective portions thereof while having a single cell gap structure, is disclosed. A method for fabricating the semi-transmissive IPS mode LCD panel is also disclosed. The panel, in which each pixel region includes a transmissive portion and a reflective portion, comprises a color filter substrate, a thin film transistor substrate assembled with the color filter substrate such that a cell gap is defined between the thin film transistor substrate and the color filter substrate, the thin film transistor substrate including storage capacitors each forming, in the reflective portion of an associated one of the pixel regions, a horizontal electric field different from a horizontal electric field formed in the transmissive portion of the associated pixel region, to compensate for a phase difference generated in the associated pixel region, and a liquid crystal layer dispensed in the cell gap, and oriented in a predetermined direction.

The invention discloses a luminescent diode driving device, which comprises the following parts: DC-DC transducer, the first and second luminescent diode tandem, the first and second current circuit and feedback circuit, wherein the DC-DC transducer outputs the DC voltage to one end of the first and second luminescent diode tandem according to the feedback voltage, which generates the first electric potential and second electric potential on the other end of the first and second luminescent diode tandem; the first and second current circuit couples the other end of the first and second luminescent diode tandem separately, which outputs the first current and second current corresponding to the first control signal and second control signal; the first and second current is applied to drive the first and second luminescent diode tandem; the feedback circuit adapts the lower electric potential in the first or second electric potential as the feedback voltage.

A display device consists of a set of polarized light separator for separating nonpolarized light to be polarized light P and S, crystal light valve LCD1 and LCD2 to control light P and light S, one projective lens and one projective screen. It is featured as displaying left and right eye image formed by integrated light path separately and viewing two images in different polarization state by wearing polarized light glasses so as to form 3-D visual effect in the cerebrum.

The invention discloses a backlight control method and apparatus, and a liquid crystal display apparatus. The main content of the method comprises the following steps: from the time when it is monitored that a first row of pixels in an N-th row image subarea of a current image frame starts driving scanning, switching off a backlight lamp of a backlight subarea for a time length of t, wherein t is scanning black frame insertion time; after the backlight lamp of the backlight subarea is switched off for the time length of t, switching on the backlight lamp of the backlight subarea for a preset time length, and enabling backlight brightness of the current backlight subarea to satisfy needed brightness; and after the backlight lamp of the backlight subarea is switched on for the preset time length, setting the backlight lamp of the backlight subarea to be closed. In such a way, a tailing phenomenon generated due to a visual persistence effect is effectively improved, at the same time, it is ensured that the backlight brightness of each backlight subarea is the same, the brightness uniformity of the backlight subarea is improved, and the display quality of a liquid crystal display apparatus is effectively improved.

The invention relates to a display panel. The display panel includes a first display area and a second display area, and the number of pixel units connected with each scanning line in the first display area is smaller than that of pixel units connected with any scanning line in the second display area; data lines include first-type data lines and second-type data lines, the first-type data lines are connected with the pixel units in the first display area, and the second-type data lines are connected with the pixel units in the second display area; the driving voltages of the first-type data lines are different from those of the second-type data lines. According to the display panel, by applying different driving voltages on the first-type data lines and the second-type data lines and setting the magnitudes of the driving voltages according to the different number of the pixel units in different display areas, the data voltages of the pixel units, connected with the two types of data lines, in the display areas can be the same, and the display panel emits light uniformly.

The invention discloses an intensity circuit, which comprises a detecting unit, a control unit and a current regulating unit, wherein, the detecting unit is used for detecting the working current size of each luminescence module and producing a plurality of detecting signals to the control unit; the control unit can produce a plurality of control signals according to the detecting signals and deliver the control signals to the current regulating unit; the current regulating unit can adjust the working current size of each luminescence module.

A display device and a method for displaying image are proposed. The first TFT and the second TFT are connected to a scan line and a data line. The first TFT and the second TFT are connected to a first sub-pixel area and a second sub-pixel area respectively. A switch unit is used for turning on/off a first current channel when the display panel is under 2D/3D display mode. The display device of the present disclosure avoids color shift in a large viewing angle under two-dimensional display mode, and displays identical luminance of left eye and right eye images under three-dimensional display mode, avoiding uncomfortable to the viewer.

The embodiment of the invention provides a pixel circuit and a display device, which are used for improving the uniformity of the display region image brightness of the display device. The pixel circuit comprises a charging sub circuit, a driving sub circuit and a luminescence control sub circuit, and the driving sub circuit comprises a reference signal source, a driving transistor, a first capacitor, a second capacitor and a luminescent device, wherein a grid electrode of the driving transistor is connected with the first end of the first capacitor, a source electrode of the driving transistor is connected with the output end of the reference signal source, a drain electrode of the driving transistor is connected with the first end of the luminescence control sub circuit, the luminescent control device is connected with the second end of the luminescence control sub circuit, one end of the second capacitor is connected with the second end of the first capacitor, the other end of the second capacitor is connected with the output end of the reference signal source, and the charging sub circuit is connected with the second end of the first capacitor.

The invention discloses a driving device of a luminous element, comprising a driving circuit, a switch, a capacitor and a compensation circuit. The driving circuit is provided with a control end and a driving end which is connected to a luminous element. The driving circuit decides a driving current according to the voltage of the control end. A first end of the switch receives a data voltage; a second end of the switch is connected to the luminous element; and a control end of the switch receives a scanning voltage. A first end of the capacitor is connected to the control end of the driving circuit; and a second end of the capacitor is connected to the second end of the switch. The output end of the compensation circuit is connected to the first end of the capacitor; and the compensation circuit provides a resetting voltage to the first end of the capacitor during the conduction of the switch.