145results 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.

In a period Tin, p-th input image data (p is a positive integer) and (p+1)th input image data are input to a liquid crystal display device. In a period T, i-th original image data (i is a positive integer) and (i+1)th original image data are generated based on the input image data. J number of sub-images (J is an integer equal to or more than 3) are generated based on the i-th original image data. In the period T, the J number of sub-images are sequentially displayed. At least one of the i-th original image data and the (i+1)th original image data is in an intermediate state between the p-th input image data and the (p+1)th input image data. Each of the sub-images exhibits one of first brightness and second brightness. At least one sub-image among the J number of sub-images is different from the other sub-images.

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 switchable viewing angle display method is provided, using arrayed microlenses and a waveguide pipe with selectable light extraction positions. The method provides a front panel array of display pixels. Also provided is an array of microlenses underlying the array of display pixels. Each microlens has a focal point and each microlens is associated with a corresponding block of display pixels. A backlight panel has an edge-coupled waveguide pipe with an optical input connected to a column of light emitting diodes (LEDs). The backlight panel includes an array extraction pixels, each extraction pixel underlying a corresponding microlens, and the backlight panel also includes a planar mirror underlying the waveguide pipe. In response to a display viewing angle change command, a waveguide pipe's light extraction position selected, which is the distance between the extraction pixels and their corresponding microlenses, and the display viewing angle is changed.

The invention discloses a pixel compensation circuit, an array substrate and a display device, and belongs to the technical field of semiconductors. The pixel compensation circuit comprises a charge storage unit of which a first end is connected to a power supply voltage signal, a driving unit of which the control end is connected with a second end of the charge storage unit and which is used for generating driving current for driving an OLED to emit light when the voltage at the second end of the charge storage unit is greater than the threshold voltage of the driving unit, a reset unit which is connected with the second end of the charge storage unit and used for writing the voltage of an initial voltage signal into the second end of the charge storage unit in the reset stage, a data writing unit which is connected with the second end of the charge storage unit and used for writing the voltage of a data voltage signal and the threshold voltage of the driving unit into the second end of the charge storage unit in the data writing stage, and a light emitting control unit which is connected with the driving unit and used for making the power supply voltage signal written into the driving unit to generate driving current in the light emitting control stage. Correct data writing is ensured.

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.

An embodiment of the invention discloses a display device and an image display method thereof. The display device comprises a display panel. The display panel comprises at least one pixel unit, each pixel unit comprises at least one sub-pixel unit, and each sub-pixel unit comprises a first partition pixel portion, a second partition pixel portion, a first thin film transistor, a second thin film transistor, a capacitor and a switch unit. The first thin film transistor is connected with a first scanning line, a first data line and the first partition pixel portion. The second thin film transistor is connected with the first scanning line, the first data line and the second partition pixel portion. The capacitor is used for receiving charge of the second partition pixel portion. The switch unit is used for opening a first current channel in a two-dimensional display mode and closing the first current channel in a three-dimensional display mode. When the display device is in the two-dimensional display mode, large viewing angle color shift can be prevented, and left eye and right eye images are ensured to have same brightness when the display device is in the three-dimensional display mode, so that discomfort of eyes of a viewer can be avoided.

The invention relates to liquid crystal display (LCD). Each pixel unit of the LCD includes a thin film transistor (TFT), a common electrode, and a pixel electrode. The pixel unit and the common electrode form a liquid crystal capacitance. TFT includes a grid, a source electrode, and a drain electrode connected to a pixel electrode. Voltage compensation unit including a comparator is connected to the above circuit. When voltage is loaded to the liquid crystal capacitance, the comparator compares potential of source electrode of TFT in time period from starting up time to closing time with potential of drain electrode after TFT shuts down, and then outputs signal of compensation voltage in order to compensate feed through voltage of TFT. The disclosed LCD can lower twinkling caused by feed through effect. The invention also discloses method for compensating feed through voltage of LCD.

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 present invention solves the motion blur of moving images in hold-type display devices. An amount of a moving image is detected from image data included in frames and an image at the intermediate state between an image of the current frame and an image of the next frame is made as an interpolation image. Thus, the movement of the image can follow the movement of human eyes and the luminance of the interpolation image is changed, and thus, display can be made close to pseudo impulse type display. In this manner, hold-type display devices without motion blur and methods of driving the hold-type display devices can be provided.

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 provides a display substrate, a display panel and a display device. The display substrate comprises multiple pixel units, each pixel unit comprises multiple colorful sub-pixels and a white sub-pixel, the areas of the multiple colorful sub-pixels are the same, and the area of the white sub-pixel is smaller than that of each colorful sub-pixel. According to the display substrate, the display panel and the display device, the brightness of the white sub-pixel region is reduced through reducing the area of the white sub-pixel region, and the brightness of the white sub-pixel region is almost the same as the brightness of the colorful sub-pixel region, so that the uniformity of the brightness is improved, and the color distortion phenomenon of a display frame is avoided.

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 belongs to the technical field of display and discloses a light guide plate, an optical diaphragm, a backlight module, an array substrate and a liquid crystal module. A reflecting layer and a condensation layer are formed between the light guide plate and the array substrate, wherein the reflecting layer is located below the condensation layer; a plurality of small holes are formed in the reflecting layer; a point light source is formed the position of each small hole; light of the point light sources are converged by the condensation layer to form parallel light; the light enters the array substrate in parallel along the same angle; no light enters the array substrate in other directions; a backlight source with a higher condensation degree is provided for a TFT-LCD (thin film transistor-liquid crystal display), so that light leak caused by different visual angles is avoided; the light seen by a user from other visual angles is caused by surface scattering of the light at the angle on a display panel; the brightness is the same when the user watches a screen from different angles; and the problem of visual angle dependency of the TFT-LCD is solved.

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 invention relates to a display device, a display panel thereof and an OLED array substrate, the OLED array substrate comprises a non-transparent display area and a transparent display area, and the non-transparent display area comprises first OLED pixels; the transparent display area comprises a second OLED pixel; the first pixel driving circuit of the first OLED pixel is connected to the first gate driving circuit group; the first gate drive circuit group is connected to a first group of gate drive signal channels of the display drive chip; a second pixel driving circuit of the second OLED pixel is connected to a second group of gate driving signal channels of the display driving chip; in the same frame of picture, the pulse widths of the first gate drive signal of the first pixel drive circuit and the second gate drive signal of the second pixel drive circuit are basically the same. According to the embodiment of the invention, synchronous display of the non-transparent display area and the transparent display area can be realized, and the split screen phenomenon of areas on the two sides of the boundary line of the non-transparent display area and the transparent display area is reduced or even avoided.

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.