64results about How to "Improve display brightness uniformity" patented technology

The invention discloses an organic light-emitting display panel and a driving method thereof and an organic light-emitting display device. The organic light-emitting display panel comprises multiple data lines and a driving circuit; multiple pixel units are correspondingly connected with the data lines; the driving circuit comprises multiple first multi-path selectors and multiple second multi-path selectors, the first multi-path selectors are electrically connected with the data lines, and the second multi-path selectors are electrically connected with the data lines; the organic light-emitting display panel comprises a data signal writing phase and a light emitting phase in a frame period; in the data signal writing phase, the first multi-path selectors transmit data signals to the data lines one by one, and in the light emitting phase, the pixel units emit light; the second multi-path selectors transmit first voltage signals to the data lines one by one after each data line receives the data signal and before the pixel units emit the light; the voltage values of the first voltage signals are smaller than those of the data signals. By means of the organic light-emitting display panel and the driving method thereof and the organic light-emitting display device, the uniformity of display brightness of the organic light-emitting display can be improved.

The invention provides a method and device for improving luminance uniformity of a passive matrix organic light-emitting diode display screen. The device comprises an image input interface circuit, a communication interface circuit, a main controller, a frame memorizer, a digital adjustable power supply circuit and a PMOLED driver circuit. The image input interface circuit receives image data which need to the displayed and transmits the image data to the main controller. The main controller receives the image data and stores the image data in the frame memorizer, and the luminance correction coefficient of each line is calculated according to the display load of each line. The main controller controls the PMOLED driver circuit to drive the PMOLED display screen to display an image, and the driving power supply voltage output by the digital adjustable power supply circuit when pixels of each line are displayed or the pixel light emitting duty ratio is adjusted according to the luminance correction coefficient of the line. According to the method and the device, the phenomenon that luminance between the lines is not uniform due to the fact that loads of all the lines are different can be effectively eliminated for the PMOLED display screen, and especially the phenomenon that luminance is not uniform when luminance is low can be effectively eliminated.

The invention discloses a pixel circuit and a driving method thereof, and an active-matrix organic light emission display device. The pixel circuit comprises first to six thin film transistors, a capacitor and an organic light-emitting diode. The grid electrode of the first thin film transistor is electrically connected to a light-emitting control line, the first terminal of the first thin film transistor is electrically connected to a first power supply, and a second terminal of the first thin film transistor is electrically connected to a first node; the grid electrode of the second thin film transistor is electrically connected to the light-emitting control line, the first terminal of the second thin film transistor is electrically connected to a second node, and a second terminal of the second thin film transistor is electrically connected to a third node; the grid electrode of the third thin film transistor is electrically connected to the third node; the grid electrode of the fourth thin film transistor is electrically connected to a first scan line, the grid electrode of the fifth thin film transistor is electrically connected to a second scan line, the grid electrode of the sixth thin film transistor is electrically connected to the second scan line, and the capacitor is electrically connected between the first node and the second node. By employing the pixel circuit and the driving method thereof, and the active-matrix organic light emission display device, images with uniform brightness can be displayed.

The invention discloses a display panel and a display device, which belong to the technical field of display. The display panel comprises a substrate, a pixel circuit layer, a light-emitting element and an auxiliary wiring layer, wherein the pixel circuit layer comprises a plurality of pixel circuits, the pixel circuits are electrically connected with the power signal lines, the light-emitting elements are electrically connected with the pixel circuits in a one-to-one correspondence mode, and the auxiliary wiring layer is located on the side, away from the pixel circuit layer, of the substrateand comprises at least one auxiliary signal line; the power signal lines and the auxiliary signal lines are electrically connected through via holes, and at least part of the power signal lines are connected with the auxiliary signal lines in parallel or connected with other similar power signal lines in parallel through the auxiliary signal lines. The display device comprises the display panel.According to the display panel and the display device, at least part of the power signal lines on one side of the substrate are connected with other signal lines in parallel, so that the impedance ofthe power signal lines is reduced, the display brightness uniformity of the display panel can be improved, and the visual experience effect of a user can be improved.

The invention discloses a driving circuit, a display panel and a display module, and relates to the technical field of display, which comprises a first power supply signal line, a second power supplysignal line, a plurality of driving sub-circuits and a light-emitting element, wherein one driving sub-circuit is electrically connected with at least one light-emitting element, the driving sub-circuit comprises a first node and a first node connected with one end of the light-emitting element, and the other end of the light-emitting element is connected with a first power signal line; each driving sub-circuit further comprises a switch module, the first end of the switch module is connected with a first node, and the second end of the switch module is connected with a second power signal line; the control end of the switch module is connected with a first control signal end; and different drive sub-circuits correspond to different first control signal ends, signals sent by the first control signal ends to the switch module comprise pulse signals, under different display gray scales, the duty ratios of the pulse signals are different, and the duty ratios of the pulse signals are in direct proportion to the display gray scales of the light-emitting element so as to facilitate improvement of display brightness uniformity.

The invention provides a display substrate comprising a peripheral display area and a central display area. A plurality of first pixel units are regularly arranged in the peripheral display area, anda plurality of second pixel units are regularly arranged in the central display area. The pixel density of the first pixel units in the peripheral display area is greater than the pixel density of thesecond pixel units in the central display area, or the pixel density of the first pixel units in the peripheral display area is equal to the pixel density of the second pixel units in the central display area, and the area of the first pixel units is greater than the area of the second pixel units. The invention also provides a preparation method of the display substrate and a display device comprising the display substrate.

The invention discloses a display panel and a display device, and relates to the technical field of display, a binding area comprises a first binding area and a second binding area located on at leastone side of the first binding area along a first direction, a first conductive layer of the first binding area comprises first conductive particles, and a second conductive layer of the second binding area comprises second conductive particles; the second binding area further comprises a plurality of electric connection terminals; orthographic projections of the first binding area and the secondbinding area in the direction perpendicular to the light emitting surface of the display panel are overlapped to form an overlapping area, and at least part of the at least one electric connection terminal is located in the overlapping area. The first binding area comprises a first area except the overlapping area, and the second binding area comprises a second area except the overlapping area; wherein the total density of the first conductive particles and the second conductive particles in the overlapping region is M0, the density of the first conductive particles in the first region is M1,the density of the second conductive particles in the second region is M2, M0 is greater than M1, and M0 is greater than M2. And the impedance of the overlapping region is reduced.

The invention provides a projection screen and a projection system, and belongs to the field of projection display. The projection screen comprises a diffusion layer, a first base material layer and areflection microstructure layer which are arranged in the thickness direction of the projection screen, and the diffusion layer is arranged on one side of the first base material layer; the diffusionlayer comprises at least one micro lens layer; the microstructure layer comprises a plurality of micro lenses; at least one of the micro lenses is a central micro lens, the other micro lenses are divergently arranged around the central micro lens, the depth-to-width ratio of the micro lenses is gradually reduced in the divergent arrangement direction, and the depth-to-width ratio of the micro lenses is equal to the height of the micro lenses/the width of the micro lenses; the reflection microstructure layer comprises a plurality of microstructures, and the microstructures are arc-shaped or parabola-shaped or oval or linear. The projection system comprises a projector and the projection screen. According to the invention, the brightness uniformity of the projection screen and the projection system is improved.

The invention discloses a pixel structure, a display screen and a method for adjusting luminance uniformity of the display screen. The pixel structure comprises a white-light backboard, an optical sensor and an optical filter, wherein the white-light backboard is used for emitting white light; the side, from which the white light is emitted, of the white-light backboard is regarded as a front side; a plurality of white-light sub-pixel layers, which are arranged side by side, are arranged on the front side of the white-light backboard, and the white-light sub-pixel layers are used for offeringwhite-light sub-pixels; the optical sensor is arranged on the front side of the white-light backboard; the optical sensor is used for acquiring luminance of the various white-light sub-pixels; the optical filter is arranged in a mode of being opposite to the front side of the white-light backboard; the optical filter comprises a plurality of sub-pixel layers which are arranged side by side; each sub-pixel layer is opposite to the position of each white-light sub-pixel layer; and the plurality of sub-pixel layers are different in color. According to the invention, the luminance uniformity of the display screen is improved.

The invention discloses a pixel structure, an array substrate and a display panel. The pixel structure comprises first data lines, first grid lines, second grid lines, first pixel units and second pixel units, wherein the first pixel units comprise first pixel electrodes and first thin film transistors; the second pixel units comprise second pixel electrodes and second thin film transistors; the first pixel units and the second pixel units are arranged in a second direction; the first pixel electrodes are arranged close to the first data lines relative to the second pixel electrodes, and the first thin film transistors and the second thin film transistors are both arranged close to the first data lines; and first connecting wires are arranged between first drain electrodes and the first pixel electrodes, and second connecting wires corresponding to the first connecting wires and enabling the first pixel units and the second pixel units to be matched in capacitance are arranged betweensecond drain electrodes and the second pixel electrodes. According to the pixel structure, the array substrate and the display panel, the pixel electrode symmetry and the pixel aperture opening ratiocan be improved, the display brightness uniformity is improved, and the display quality is improved.

The embodiment of the invention discloses a display panel and a display device. The display panel comprises a display area and a peripheral circuit area. The display area is provided with a pluralityof scanning signal lines, a plurality of light-emitting control signal lines, a plurality of reference signal lines and a plurality of pixel circuits arranged in a matrix mode. The peripheral circuitarea is provided with a plurality of scanning driving circuits, a plurality of light emitting control circuits, a low potential signal line, a high potential signal line and a reference signal bus; the peripheral circuit region also comprises a plurality of aging test terminals; at least one of the low potential signal line, the high potential signal line and the reference signal bus is electrically connected with the two aging test terminals respectively; the two aging test terminals are connected with different aging test signals; it is guaranteed that in the aging test stage, the pixel units at the different positions of the display area have the same or similar luminance, the pixel units at the different positions have the same or similar aging speed, and it is guaranteed that the pixel units at the different positions of the display area have good display uniformity in the display stage.

This application discloses an array substrate, comprising: a plurality of scan line extending in the first direction; a plurality of data wire extending in the second direction; pixel arraywhich includes the multiple display pixels formed by crossing of scan line and data wire insulation; The array base plate also includes liquid crystal farmland array, which includes liquid crystal farmland groups of multiple array arrangements, and each liquid crystal farmland group includes the first liquid crystal farmland and the second liquid crystal farmland located along the second direction. A plurality of first electrode being parallel to each other is formed with the first liquid crystal farmland, and is formed with a plurality of second electrode being parallel to each other in the second liquid crystal farmland; First electrode and second electrode are different strip-shaped electric poles in different extending directions, and the lengthof the first electrode h1 and the length of the second electrode satisfies the condition: h1 =/ h2. This inverntion enhances the brightness uniformity of the display panel under different viewing angles.

The invention provides a display panel and a manufacturing method thereof. The display panel comprises a substrate, and a pixel definition layer located on the substrate; the pixel definition layer comprises a plurality of pixel definition blocks which are arranged at intervals; a groove is formed in one side, far away from the substrate, of each pixel definition block, and an auxiliary electrodeis arranged in each groove; and the bottom surface of each groove has hydrophilicity, and the inner side surface of each groove has hydrophobicity. According to the display panel and manufacturing method thereof provided by the technical schemes of the invention, the line width and morphology of the auxiliary electrodes can be regulated and controlled, the voltage drop problem is effectively alleviated, and then the display brightness uniformity of the display panel is improved.

The invention provides a projection screen and a projection system, and belongs to the field of projection display. The projection screen comprises a columnar micro-lens layer, a first base material layer and a reflection microstructure layer which are arranged in the thickness direction of the projection screen, and the columnar micro-lens layer comprises a columnar micro-lens layer I and a columnar micro-lens layer II and is arranged on one side of the first base material layer; the columnar micro-lens layer I comprises a plurality of vertical columnar micro-lenses, and the height-width ratio of the vertical columnar micro-lenses arranged in the direction from the transverse direction of the projection screen to the two ends is gradually reduced by taking the central axis as a reference;the columnar micro-lens layer II comprises a plurality of transverse columnar micro-lenses, and the height-width ratio of the transverse columnar micro-lenses is gradually reduced from one side to the other side in the vertical direction of the projection screen; the reflection microstructure layer is provided with a plurality of microstructures, and the microstructures are arc-shaped or parabola-shaped or oval or linear. The projection system comprises a projector and the projection screen. According to the invention, the brightness uniformity of the projection screen and the projection system is improved.

The invention provides a projection screen and a projection system, and belongs to the field of projection display. The projection screen comprises a columnar micro-lens layer, a first base material layer and a reflection microstructure layer which are arranged in the thickness direction of the projection screen, the columnar micro-lens layer is arranged at one side of the first base material layer, and the columnar micro-lens layer comprises a plurality of columnar micro-lenses which are transversely arranged. The height-width ratio of the columnar micro lens is gradually reduced from one side to the other side along the vertical direction of the projection screen, and the height-width ratio of the columnar micro lens is equal to the difference of the height of the columnar micro lens andthe width of the columnar micro lens; the reflection microstructure layer is provided with a plurality of microstructures, and the microstructures are arc-shaped or parabola-shaped or oval or linear.The projection system comprises a projector and the projection screen. According to the invention, the brightness uniformity of the projection screen and the projection system is improved.

The invention discloses a pixel driving circuit, a driving method, a display panel and a display device. In the pixel driving circuit, a first end of a driving module is used for inputting signals output by a first power supply, a first light-emitting control module is connected between a second end of the driving module and a first end of a light-emitting module, and a second end of the light-emitting module is connected with a second power supply; a first end of a first storage module is connected with a control end of the driving module, a second end of the first storage module is connected with a first end of a second storage module, and a second end of the second storage module is connected with the first end of the light-emitting module; a threshold detection module is connected with the second end of the first storage module and the second end of the driving module, and can control the first storage module to store threshold voltage of the driving module; a data writing module is connected with the second end of the driving module; and an initialization module is connected with the control end of the driving module and the first end of the light-emitting module. According to the technical scheme provided by the invention, compensation for threshold voltage can be enhanced, and brightness deviation of a display panel is reduced.

The invention discloses a display substrate and a manufacturing method thereof, and a display device and belongs to the technical field of display. The display substrate may include a plurality of pixel units disposed on a substrate; an encapsulation layer arranged on a side of the plurality of pixel units remote from the substrate; a conductive film layer disposed on a side of the encapsulation layer remote from the substrate; and a protective film layer arranged on a side of the conductive film layer remote from the substrate. Since the display substrate also includes a conductive film layerdisposed between the encapsulation layer and the protective film layer. When the protective film layer is torn, electrons generated by the electrostatic discharge phenomenon due to friction can be released to the conductive film layer. As that protective film layer is torn, the problem that electrons transition to the active layer of the transistor in the display substrate, thereby shifting the threshold voltage of the transistor is avoided. The display substrate provided by the invention has good uniformity of display brightness.

A display driving method is disclosed. The display driving method includes the following steps: (A) generating a gate driving signal having a turn-on period by a gate driver; (B) generating a source driving signal by a source driver; the source driving signal has a first waveform corresponding to a first region and has a second waveform corresponding to a second region; (C) outputting, by a controller of a display device, a first control signal to allow the second waveform to be similar to the first waveform in the turn-on period.

The invention discloses a display module and a display device, and relates to the technical field of display. A backlight module comprises a backlight hole, and the backlight hole penetrates through the backlight module in the thickness direction of the backlight module; the display panel is located in the light emitting direction of the backlight module; a light supplementing assembly is located on the side, away from the display panel, of the backlight module; a light supplementing component comprises a light supplementing lamp and a reflecting film, and the reflecting film is located on the side, away from the backlight module, of the light supplementing lamp in the thickness direction of the backlight module; and at least part of light emitted by the light supplementing lamp is reflected by the reflecting film and then is emitted to the backlight hole. Thus, in the display process, light rays emitted by the light supplementing lamp can supplement light to the area corresponding to the backlight hole, the problem that a dark area is obvious due to insufficient light rays in the area corresponding to the backlight hole during display is solved, the display brightness uniformity of the area corresponding to the backlight hole and other display areas can be improved, and the display effect is improved.

The invention provides a light diffusion structure and a light diffusion sheet, and relates to an optical element. A light diffusion structure comprises a micro-lens layer I and a micro-lens layer II.The micro-lens layer I comprises a plurality of vertically-arranged cylindrical micro-lenses, the height-width ratio of the cylindrical micro-lenses arranged in the direction from the transverse direction of the light diffusion structure to the two ends of the light diffusion structure is gradually decreased with the central axis as the benchmark, and the central axis is the symmetry axis of thecolumnar micro-lens with the maximum height-width ratio in the micro-lens layer I. The micro-lens layer II comprises a plurality of cylindrical micro-lenses which are transversely arranged, the height-width ratio of the cylindrical micro-lenses arranged in the vertical direction of the light diffusion structure is gradually reduced, and the height-width ratio of each columnar micro-lenses is the ratio of the height of the columnar micro lens to the width of the columnar micro lens. The light diffusion sheet comprises a base material and the light diffusion structure manufactured on the base material. According to the light diffusion structure and the light diffusion sheet, the display uniformity effect is improved.