107results about How to "Solve uneven brightness" patented technology

The invention relates to a display panel, which is characterized in that the opening area of any sub-pixel arranged in a first transition display area is larger than that of a same-color sub-pixel arranged in a first display area, and the opening area of any sub-pixel arranged in the first transition display area is less than that of a same-color sub-pixel arranged in a second display area; the minimum distance between any two most adjacent same-color sub-pixels arranged in the first display area is x, the minimum distance between any two most adjacent same-color sub-pixels respectively arranged in the first transition display area and the second display area is y, and the minimum distance between any two most adjacent same-color sub-pixels arranged in the second display area is z, y is greater than or equal to x and less than or equal to z, and the opening area of the sub-pixel is a light emitting area of the sub-pixel. The display panel can effectively reduce the difference in visionof users due to the different sub-pixel per inch (PPI) between the first display area and the second display area, avoid the occurrence of dark spots or dark lines and improve the display effect. Theinvention further provides a display device.

The invention provides an AMOLED (active-matrix organic light emitting diode) display device and a compensation method thereof. The display device comprises a pixel unit and a voltage drop compensation unit. The voltage drop compensation unit comprises a control subunit and a detection subunit, wherein the detection subunit is used for acquiring voltage of a power supply node of the pixel unit and sending the voltage to the control subunit; and the control subunit is used for determining voltage variation of the power supply node according to the voltage and standard voltage and modifying data signals of the corresponding pixel unit based on the voltage variation so as to compensate the voltage variation. The AMOLED display device and the compensation method thereof provided by the invention can compensate voltage drop (IR Drop) generated by power supply voltage on a wire, so that the brightness uniformity of an AMOLED display panel can be improved, and a problem of brightness nonuniformity caused by the IR Drop is also solved.

The embodiment of the invention discloses a display panel and a manufacturing method thereof and a flexible display device and a control method thereof. The mask film process can be reduced so that production efficiency can be enhanced and cost can be reduced. The display panel comprises display units, and sensing units which are used for detecting brightness of the display units. The sensing units and the display units are synchronously formed in different areas of the same underlying substrate.

The invention provides a screen correction method, device and system and a logic board, and the method comprises the steps: receiving a test image, collected by a camera, displayed on an LCD spliced screen, and reading pre-generated reference data; determining test brightness according to the test image, and adjusting the test brightness according to the reference data so as to complete brightnessadjustment of the LCD spliced screen; and based on the adjusted test brightness, performing gray scale adjustment on the test images of different gray scales by utilizing the reference data so as torealize gray scale adjustment of the LCD spliced screen. According to the invention, correction is carried out by taking pre-generated reference data as a reference; the problem of different optical parameters of different batches is avoided, the brightness of the backlight light bar of the LCD spliced screen is adjusted according to the table and the test image, and then gray scale adjustment isperformed, so that the problems of non-uniform brightness and non-uniform display effect, namely gray scale inconsistency, caused by backlight brightness are solved.

The invention is suitable for the field of liquid crystal display and provides a directly-lit LED backlight module. The backlight module comprises a printed circuit board, wherein the front side of the printed circuit board is provided with an LED chip electrically connected with the printed circuit board; and the light emergent direction of the LED chip is provided with a light guide board on which fluorescent excitation substances are uniformly distributed. In the invention, the bare LED chip is directly arranged on the printed circuit board, and then the light emergent direction of the LED chip is provided with the light guide board on which the fluorescent excitation substances are uniformly distributed, because the LED chip is not singly packaged, the problems of inconsistent color coordinates caused by non-uniform fluorescent powder dosage and non-uniform brightness caused by errors of glue dispensing positions are solved; meanwhile, the package cost is saved, the manufacturing procedure is simplified, the absorption to light by fluorescent glue is avoided and the light efficiency of the backlight module is improved.

The invention discloses a display panel brightness control method and device. The method comprises the steps: obtaining a plurality of pixel values processed by an image processor, wherein the bit width of each pixel value is a first preset bit width; performing data type conversion of all pixel values to obtain a plurality of pixel values with a second preset bit width, wherein the second presetbit width is greater than the first preset bit width; sending the pixel values of the second preset bit width into a digital-to-analog conversion module to determine the voltage output value of each sub-pixel of the display panel, wherein the voltage output value and the screen brightness of the display panel are in a first linear relation; and adjusting the voltage output value to control the screen brightness of the display panel. According to the method and the device, the technical problem that the interest of a user in using the display panel is reduced due to insufficient compensation precision when the phenomenon of uneven brightness of the display panel is eliminated by adjusting the gray scale compensation voltage in the related art is solved.

In a planar light source apparatus, light from a point like light source is reflected on a side surface of a light guide plate, preventing light from uniformly spreading and thus causing brightness unevenness, and light exits from the light guide plate and is reflected on a reflection plate, which arises a problem of a low light use efficiency. Disclosed is a planar light source apparatus (100) which is provided with a point like light source (16) and a light guide plate (13) having a rectangular, flat plate shape in a plan view. The light guide plate has a light exiting surface, which faces an opening portion, a pair of second side surfaces (13b), which face each other, and a hole (13c), which is formed on a position where the point like light source (16) is disposed and is opened on an opposite light exiting surface in the vicinity of one first side surface (13a). A ridge line is provided in a direction perpendicular to the light exiting surface (1a), and at least a part of the surfaces of the pair of second side surfaces is a prism having a saw-shaped, repetitive concavo-convex cross section in a direction parallel to the light exiting surface (1a), with the result that light from the point like light source can be efficiently uniformed on the light guide plate, and the brightness unevenness can be prevented.

The invention provides an OLED pixel driving circuit and a display device. The OLED pixel driving circuit comprises a first transistor (T1), a second transistor (T2), a third transistor (T3), a fourth transistor (T4), a transistor fifth (T5), a driving transistor (DTFT), a storage capacitor (C1), a light emitting diode (D1), a first voltage source (VDD), a second voltage source (VSS), an initialization power source (Vinit), a data signal line (Data), a first node (d), a second node (g), a third node (s) and a fourth node (a); and the OLED pixel driving circuit is provided with a first selection signal line (S1), a second light emission control line (S2), a third light emission control line (S3), or is provided with a first selection signal line (S1), a selection second signal line (S21) and a third light emission control line (S3). With the OLED pixel driving circuit and the display device of the invention adopted, threshold voltage Vth and power source voltage drop can be effectively supplemented, the problem of organic material polarization of an organic light emitting diode (OLED) can be avoided, and the display effect of the display device can be improved, and the service life of the display device can be prolonged.

The invention discloses a method and a device for taking a picture. The method comprises the steps of converging the exposure values of a normally-exposed area, an overexposed area and an underexposed area determined in pre-flashing into normal ones to obtain three pictures of different exposure values when a flash lamp flashes formally, and synthesizing the areas of which the exposure values converge normally in the three pictures of different exposure values into one picture. According to the invention, the overexposed area and the underexposed area in pre-flashing are processed into normally-exposed areas, the areas after processing are reintegrated, and finally, a picture with uniform brightness is obtained. Therefore, the shooting effect of the flash lamp is improved greatly.

The invention relates to panel carrying device, the panel carrying device includes a bedplate and a loading device, the bedplate includes a drive mechanism, and the loading device is mounted on the drive mechanism, and the loading device includes several loading seats, several cupula sets, several sliding rails and several carrying arms, the cupula sets are mounted on the loading seats, the sliding rails are mounted on the loading seats, and the carrying arms are mounted on the sliding rails to mount the panel. When the panel of panel carrying device is been carrying, it can avoid the panel falling off to reduce the non defective rate, and overcomes the asymmetry of brightness, and carry the panels with different size to improve the production.

A light guide plate transfer molding method for performing transfer molding of a light guide plate using a first mold and a second mold, includes performing, on a resin material, transfer molding of a first pattern and a second pattern that are provided on a transfer face of the first mold. The first pattern changes with a specific interval P serving as one period. The second pattern changes with one or two or more periods that correspond to 1/Na of the interval P. Na is a positive integer that satisfies Na≰m, m being a specific positive integer.

The invention provides a backlight module with dot patterns and a diffuser plate structure thereof. The backlight module mainly consists of a reflector plate, a plurality of light sources and a diffuser plate. The light sources are arranged on the reflector plate with one light source space (P) to each other. The diffuser plate is arranged on the light source and keeps a distance of one mixed-light height (H) with the reflector plate. The diffuser plate includes dot patterns which possess a plurality of dots. The dots are arranged along the array direction of the light sources, and the size of the dots distributes according to a plurality of linear functions which are the functions of the light source space (P).

The invention provides a panel brightness adjustment method and device and a storage medium. The method comprises the steps of respectively determining the corresponding target pulse width of an enabling signal in each area of a panel according to the pulse width of a data signal, wherein the enabling signal is different in corresponding target pulse width in at least two areas of the panel; and adjusting the brightness of the panel according to each target pulse width. The panel brightness adjustment method and device and the storage medium provided by the invention can effectively improve aproblem of uneven brightness of the panel and thus improve the satisfaction of users.

The invention provides a display panel and a method for detecting bending degree of a bending region. The display panel comprises n deformation detecting units, wherein at least part of the deformation detecting units are arranged in the bending region, the deformation detecting units are distributed in a line in the bending direction of the display panel; the deformation detecting units comprisea first strip-shaped semiconductor, a second strip-shaped semiconductor, a first resistor element and a second resistor element which are arranged in a bridge-arm shape and have the connection mode of(first strip-shaped semiconductor)-(second resistor element)-(second strip-shaped semiconductor)-(first resistor element)-(first strip-shaped semiconductor); equivalent resistance values of the firststrip-shaped semiconductor and second strip-shaped semiconductor change along with the change of own bending degrees thereof, and the resistance values of the first resistor element and second resistor element do not change along with the change of deformation amounts of the bending area, therefore, the problem of uneven brightness of a displayer under a bending state is solved by accurately calculating the bending degree of each position of the display panel can be solved.

Provided is a backlight unit for a display device. The backlight unit includes a transparent light guide panel having a lower surface with a pattern forming unit in which a prism pattern is formed as grooves, a light source disposed on a side of the light guide panel, a reflection plate disposed under the light guide panel, wherein depths and/or a density of the grooves in the prism pattern consecutively increase close to electrodes of the light source in a length direction of the light source.

The present invention provides a driving method of a display panel and a display device utilizing the method. The display panel is provided with the following components: a plurality of pixels, a plurality of data wires, a plurality of scanning wires and a plurality of common electrodes. The pixels are arranged in a matrix. The data wires and the scanning wires are electrically coupled with the pixels. Furthermore the common electrodes are all provided in the lower substrate of the display panel. The driving method comprises the following steps: providing a plurality of common levels with different time sequences to the common electrodes, wherein each common level is provided with two reference levels; and providing a plurality of grid signals with different time sequences for the scanning wires in one picture display period for starting the pixel, and switching to a reference level of the common level which corresponds with the pixel to be opened before starting the pixel.

The invention provides a backlight module which comprises a substrate, a light source and at least one polygonal supporting piece, wherein the substrate comprises a bottom surface, and the light source is arranged on the substrate. A cross section of the polygonal supporting piece comprises a first side edge, and an included angle between a projection line of a connecting line of a middle point of the first side edge and the light source on the bottom surface and a projection line of the first side edge on the bottom surface is in a range from 80 degrees to 100 degrees.

The invention provides a method for calibrating the sensing brightness of an image sensor. In the method, after the image sensor in an optical touch panel is subject to a whitening program to calibrate the sensing brightness, the brightness distribution after whitening is multiplied by a brightness multiplying factor, and the brightness distribution after whitening is calibrated to be approximate or equal to a datum brightness to ensure that the brightness distribution after whitening can not be disturbed by external factors and have an error. By adopting the method, the phenomenon of non-uniform brightness caused by larger brightness distribution gap generated in the detection range of the image sensor can be solved.

The invention is a driving method for a display device, applied to an electrically lighting display device which has plural pixel columns, where each pixel comprises a lighting cell, a switch transistor and a drive transistor connected to the switch transistor and the lighting cell. And the driving method controls the electrically lighting display device to display a frame picture in a display period and comprises the steps of: defining the display period which has three time intervals; in order starting up the pixel columns in the first and second time intervals; providing a displayed data for the pixel columns in the first time interval; providing a gray level data for the pixel columns in the second time interval; and resetting the pixel columns in the third time interval.

The invention discloses a display with an edge-lit light guide combined backlight board and a homogenization method thereof. The display comprises the backlight boards, liquid crystal boards, a group of memory devices and a group of control devices, wherein the backlight board is used for leading a light source in, and consists of a plurality of light guides which are arranged adjacent to one another; the liquid crystal board is positioned on the emergent side of the backlight board, and consists of a plurality of unit cells with variable light permeability; the group of memory device stores the emergent light distribution of the light guides; the group of control devices calculate compensation image information to control the light permeability of the cell units of the liquid crystal board; and in the local-area dimming control homogenization of the backlight board, luminance is controlled in combination with the emergent rate distribution information of the fusion light guides, and the individual light permeability of the cell units is determined according to the compensation image information to achieve a luminance homogenization effect.

The invention discloses a halftone mask plate. The halftone mask plate comprises an opening area and a shading area, wherein the opening area comprises a plurality of partially transparent first openings and a plurality of fully transparent second openings; the calibers of the first openings are not exactly the same, and the light transmittance of the first openings are also not exactly the same, so that the size dimensions of exposed diagrams of the first openings are equal, the exposed diagrams of the first openings are auxiliary cylinder-shaped spacers, and the exposed diagrams of the second openings are main cylinder-shaped spacers. According to the halftone mask plate, a thin film transistor liquid crystal display can be prevented from generating un-uniform brightness, and is convenient to use.

The invention discloses a backlight assembly and a liquid crystal display module. The backlight assembly comprises a middle frame, a back plate, a diffusion plate, a reflector plate and a light guideunit; the middle frame is used for supporting a liquid crystal panel, the back plate is buckled on the rear side of the middle frame, a plurality of light sources are arranged on the back plate, the diffusion plate is in lap joint with the middle frame, and the diffusion plate is located between the liquid crystal panel and the back plate. The reflector plate is in lap joint with the middle frameand located between the diffusion plate and the back plate, the light guide unit is in lap joint with the middle frame and located between the reflector plate and the diffusion plate, and the light guide unit is used for guiding light emitted by the light source to the diffusion plate. According to the backlight assembly, incident light of the edge of the diffusion plate is increased, and therefore the problem that when a liquid crystal display panel with the small BM width value is adopted, uneven brightness such as bright frames and dark frames can occur on the edge of the whole liquid crystal display module is solved.