79results about How to "Improve display uniformity" patented technology

The invention relates to the technical field of light source driving control, and discloses an area array type LED light source driving control method, device and equipment. The method comprises the following steps: constructing an upper-layer display control subsystem and a lower-layer drive control subsystem of the area array type LED display system, and collecting a multi-dimensional state data set; performing N-step prediction optimization calculation and brightness uniformity constraint calculation to obtain an optimal control sequence of the LED unit; carrying out extended state observer processing to obtain an LED unit compensation control quantity; compensation area construction and area brightness compensation analysis are carried out, and LED unit area compensation parameters are obtained; performing multi-stage PWM period division and modulation calculation to obtain an LED unit driving control signal; and performing consistency constraint calculation and gradient optimization calculation to obtain global display control parameters of the area array type LED display system, so that smooth transition between the sub-area control units is realized, and the overall display effect of the large-size display system is ensured.

The invention discloses a display panel and a display device. The display panel comprises a pixel circuit and a light-emitting element, the pixel circuit comprises a driving module, a data writing module, a compensation module and a reset module. The driving module comprises a driving transistor; the data write-in module is connected to the first electrode of the driving transistor; the compensation module is connected between the grid electrode and the second electrode of the driving transistor; the reset module is connected to the grid electrode or the second electrode of the driving transistor; wherein the working process of the pixel circuit comprises a first bias adjustment stage, and the first bias adjustment stage comprises a first stage; in the first stage, the data write-in module and the reset module are turned off, and the compensation module is turned on. According to the technical scheme, different degrees of bias adjustment can be performed on the driving transistor under different gray scales, so that the display uniformity of the display panel is improved.

The invention provides a volume holographic grating waveguide, a manufacturing method thereof and near-to-eye display equipment. The problem that coupled light intensity is not uniform due to transmission light intensity attenuation when light is transmitted in a waveguide substrate can be solved. The volume holographic grating waveguide includes: a waveguide substrate having an in-coupling region and an out-coupling region for transmitting image light from the in-coupling region to the out-coupling region; the coupling-in element is correspondingly arranged in the coupling-in area of the waveguide substrate, and is used for coupling the image light into the waveguide substrate from the coupling-in area; and a volume hologram out-coupling grating, which is correspondingly disposed in the out-coupling area of the waveguide substrate, and is used for coupling the image light out of the waveguide substrate from the out-coupling area. Wherein a thickness of the volume holographic decoupling grating increases along an image light transmission direction at the decoupling region.

The invention provides a display panel, a display device, a display driving method and a readable storage medium. The display panel is provided with a plurality of gamma units, part or all of the gamma units are only connected with sub-pixels of the same color, a first voltage signal is further detected through a detection signal end, and a first reference gamma voltage and a second reference gamma voltage of the gamma units are adjusted according to a detection result of the first voltage signal. The gamma reference voltages of the sub-pixels with different colors can be dynamically compensated when the external driving voltage changes, and the display uniformity of the display panel is improved.

According to the display panel and the display device, the display panel comprises a first shading part and a second shading part which are located on the side, away from a pixel layer, of a packaging layer, and the first shading part is not overlapped with a first type of sub-pixels and is close to the first side of the first type of sub-pixels; the second shading part is not overlapped with the first type of sub-pixels and is close to the second side of the first type of sub-pixels. According to the display panel, the emergent angle a of emergent light which can be shielded by the first shading part is set to be larger than or equal to theta1 and smaller than or equal to theta2, and the emergent angle a of emergent light which can be shielded by the second shading part is set to be larger than or equal to theta3 and smaller than or equal to theta4, so that the brightness of small-angle light which is emitted towards the first side and the second side of the display panel is symmetrical; and the brightness of the light rays in the wide-angle range emitted by the first type of sub-pixels is still kept in a normal attenuation ratio, so that the display uniformity and the peep-proof performance of the display panel are improved, the risk of a'dark and light screen phenomenon 'is reduced, and the visual effect of watching the display panel is improved.

The application discloses an array substrate and a liquid crystal display panel, and belongs to the technical field of display. The array substrate has a plurality of sub-pixel regions. The array substrate comprises a substrate, and a sub-pixel, a first insulating layer, a common electrode and a first supporting column located on one side of the substrate. The sub-pixel comprises a transistor and a pixel electrode, and the first insulating layer is located between the transistor and the pixel electrode in a direction perpendicular to the substrate. In the same sub-pixel region, the first insulating layer comprises a first via, and the pixel electrode is overlapped with a first electrode of the transistor through the first via. One first supporting column corresponds to two first vias adjacent in a first direction. For the corresponding first supporting column and two first vias, the first supporting column has a part extending into the two first vias, and in the first direction, the maximum width of the first supporting column located in the first via is less than the maximum width of the first via. In this way, the uniform distribution of the guide liquid can be ensured, and the display uniformity is improved.

The invention provides a thin film transistor and a preparation method thereof, an array substrate, a display panel and a display device. The thin film transistor comprises a substrate, a first electrode, a first insulating layer, a second electrode, an active layer, a second insulating layer and a control electrode. The first pole is arranged on one side of the substrate, the first insulating layer is arranged on one side, away from the substrate, of the first pole and comprises a first hole, the first pole is at least partially exposed in the first hole, and the second pole is arranged on one side, away from the substrate, of the first insulating layer. The active layer is arranged on the sides, away from the substrate, of the first electrode and the second electrode and connected between the first electrode and the second electrode, the active layer is partially attached to the side wall of the first hole in the circumferential direction of the first hole, and the second insulating layer is arranged on the side, away from the substrate, of the active layer and partially attached to the side wall of the first hole. The control electrode is arranged on the side, away from the substrate, of the second insulating layer. And the orthographic projection part of the second pole on the substrate surrounds the orthographic projection of the first hole on the substrate.

The present application provides a display panel and a display device. The present application keeps the thickness of the first side wall of the conductive enclosure structure unchanged while ensuring that the area and shape of the area enclosed by the outer side wall of the conductive enclosure structure remain unchanged. By reducing the thickness of the second side wall of the conductive enclosure structure, the area of ​​the pixel accommodation area enclosed by the conductive enclosure structure can be increased, thereby increasing the effective light-emitting area of ​​the sub-pixels accommodated in the pixel accommodation area, thereby facilitating the improvement of the pixel aperture ratio of the display panel; secondly, the present application keeps the thickness of the first side wall of the conductive enclosure structure unchanged, and makes the cathode of the sub-pixel enclosed by the conductive enclosure structure contact with the first side wall to achieve electrical connection between the sub-pixel and the conductive enclosure structure, thereby maintaining good electrical connection between the sub-pixel and the conductive enclosure structure while improving the pixel aperture ratio, which is conducive to achieving a mesh electrical connection of the cathode of the sub-pixel, thereby improving the display uniformity of the display panel.

The application discloses a kind of zero visual seam's liquid crystal display unit, it is related to display technical field.The display unit includes backlight module, liquid crystal panel assembly and optical compensation composite cover plate.Wherein, the edge of backlight module is equipped with the chamfer support surface that is inwards shrinkage, the non-display area of liquid crystal panel assembly is bent or adhered along the chamfer support surface, so that the physical height of non-display area is lower than the plane where effective display area is located.Optical compensation composite cover plate is adhered to the surface of liquid crystal panel assembly and extends to cover above non-display area, and the cover plate sequentially includes light remodeling layer, waveguide light uniform layer and wide-angle scattering layer from bottom to top.The application is cooperated by mechanical structure and micro-nano optics, realizes the visual screening of physical seam under the premise of not increasing electronic control complexity, solves the problems of large assembly thickness, black seam ghost and edge image distortion in traditional seam elimination scheme.

The invention discloses a display device, and belongs to the technical field of display, the display device comprises a display panel, a pixel array in the display panel comprises a plurality of pixel groups, and each pixel group comprises at least one pixel row; in a display frame period, different pixel groups receive different compensation bias voltages; the compensation bias voltage is used for compensating the bias voltage of the pixels in the pixel group; the compensation bias voltage is determined based on flicker characteristic data of the display panel; the flicker characteristic data of the display panel at least comprises the optimal bias voltage value corresponding to each pixel group. According to the display device, different and customized bias voltage compensation can be carried out on different areas in the display panel according to actual physical characteristic differences of the different areas of the display panel, so that the hysteresis characteristics of driving transistors in all the areas of the display panel under the low refresh rate can be well adjusted, and the display effect is improved. And the non-uniform flicker of the display panel caused by the regional characteristic difference under the low refresh rate is effectively eliminated.

The invention provides a display panel, a tiled display device and a preparation method of the tiled display device. The display panel comprises a substrate, a binding terminal, a driving circuit layer and a miniature light-emitting diode device, the binding terminal is arranged on one side of the substrate, the driving circuit layer is arranged on the side, away from the binding terminal, of the substrate and comprises a signal line, and the miniature light-emitting diode device is arranged on the side, away from the substrate, of the driving circuit layer. The substrate is provided with a via hole, and the signal line passes through the via hole and is connected with the binding terminal. According to the display panel, the binding terminal is arranged on one side of the substrate, the signal line penetrates through the via hole to be connected with the binding terminal, the binding position of the display panel is arranged on the back face, the binding terminal does not need to be arranged in the edge area, binding wires do not need to be arranged on the side face, a frame is reduced, and the yield of the display panel is increased; and the signal is directly input from the bottom of the display panel, and the length of the signal line is small, so that the voltage drop is reduced, and the display uniformity is improved.

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate and a plurality of sub-pixels. The substrate comprises a bonding pad end and a bonding pad far end which are oppositely arranged. The plurality of sub-pixels are positioned on one side of the substrate; wherein in the direction from the bonding pad end to the far end of the bonding pad, the light emitting efficiency of the sub-pixels is in an increasing trend. In the direction from the bonding pad end to the far end of the bonding pad, the light emitting efficiency of the sub-pixels is in an increasing trend, the problem of light emitting efficiency difference caused by the fact that current is gradually reduced from the bonding pad end to the far end of the bonding pad is compensated, and therefore the display uniformity is improved.

This application discloses a display panel and a display device, belonging to the field of display technology. The display panel includes: a substrate; scan lines extending along a first direction and spaced apart on the substrate; data lines extending along a second direction and spaced apart on the substrate, the scan lines and data lines intersecting on different layers to form sub-pixel areas; common electrode traces extending along the second direction and spaced apart on the substrate in the first direction; the projections of the common electrode traces and data lines on the substrate at least partially overlap; and bridging traces configured to bridge two adjacent common electrode traces in the second direction; the display device includes the above-described display panel. This application reduces the lateral space occupied by the common electrode traces in the pixel aperture area, improves the pixel aperture ratio and light transmittance, increases display brightness, reduces device operating power consumption, and can improve display uniformity and reduce vertical bright and dark stripes.

A display substrate and a display device. The display substrate comprises a plurality of array distributed sub-pixels, a pixel driving circuit of a plurality of sub-pixels forms M pixel rows and N pixel columns; the display substrate further comprises a first initialization signal line and a second initialization signal line extending along a first direction; the pixel driving circuit comprises a plurality of transistors and a light emitting device, the plurality of transistors comprising a driving transistor; the light emitting device comprises a first electrode; wherein the first initialization signal line is respectively electrically connected with the mth row of sub-pixels, and is configured to transmit a first initialization signal to the control electrode of the mth row of pixel driving transistors; the second initialization signal line is respectively electrically connected with the m-1th row of sub-pixels, and is configured to transmit a second initialization signal to the first electrode of the light emitting device of the m-1th row of sub-pixels, m is a positive integer greater than or equal to 1 and less than or equal to M; the first initialization signal is different from the second initialization signal.

The application discloses a driving and biasing circuit of a pixel array, the pixel array is divided into M*N same square sub-arrays, each pixel in each sub-array is provided with a driving branch, the driving branch comprises a current mirror PMOS tube MP0 and a switch PMOS tube MP1, the gate of the current mirror PMOS tube MP0 is connected with a bias voltage VBP, the gate of the switch PMOS tube MP1 is connected with a switch SW signal output by a data latch and switch control circuit, and the drain of the switch PMOS tube MP1 is connected with a pixel; the biasing branch comprises a first-stage current mirror array and a second-stage current mirror array connected, the first-stage current mirror array is used for copying a reference current IREF into M*N parts and outputting an IBIAS current; one second-stage current mirror array is arranged in each sub-array and is used for receiving the IBIAS current and outputting a bias voltage VBP, and the bias voltage VBP is connected with the driving branch in each sub-array.

This application discloses a display panel and a display device. The display panel includes a pixel driving circuit and a light-emitting element. The pixel driving circuit includes a first driving transistor and a second driving transistor. The first driving transistor is coupled between a first power line and a first electrode of the light-emitting element, and the second driving transistor is coupled between the first power line and the first electrode of the light-emitting element. The subthreshold swing of the first driving transistor is greater than that of the second driving transistor. In a first brightness mode, the first driving transistor connects the first power line and the first electrode of the light-emitting element. In a second brightness mode, the second driving transistor connects the first power line and the first electrode of the light-emitting element. The brightness of the light-emitting element in the first brightness mode is greater than that in the second brightness mode. This application can accommodate the different display requirements of the display panel under high and low brightness conditions, thereby improving the display uniformity of the display panel under high and low brightness conditions.

The invention discloses a mask plate structure, an optical structure and a forming method thereof, and the method comprises the steps: providing a substrate which comprises one or more optical structure regions; providing a mask plate structure, wherein the mask plate structure comprises a first mask plate and a second mask plate which are arranged in the direction perpendicular to the surface of the substrate; providing a target material, and arranging the target material above the substrate; the mask plate structure is arranged between the target material and the substrate, the second mask plate is in contact with the substrate, the second through hole corresponds to the optical structure area, and the first through hole corresponds to the target material; and bombarding a target material to form a material layer with the thickness continuously and gradually changing on the optical structure area, so that the continuous change of the thickness of the optical structure is accurately controlled.

The invention discloses a display device, and belongs to the technical field of display, and the display device comprises a display panel and a low dropout regulator. A pixel array in the display panel comprises a plurality of pixel groups, and each pixel group comprises at least one pixel row. The low dropout voltage stabilizer is connected with one pixel group and is used for performing voltage amplitude compensation on the received gate driving signal of the pixel group and outputting the compensated gate driving signal to the pixel group so as to perform scanning driving on pixels in the pixel group; the compensated gate driving signal and the gate driving signal have the same frequency, phase and duty ratio. According to the display device provided by the invention, the voltage amplitude attenuation of the gate driving signal in the long-distance transmission process can be effectively compensated, so that the pixels at different positions can receive sufficient effective driving voltage; and non-uniform display brightness and abnormal display of the display panel caused by insufficient charging of partial pixels or unstable switching state are avoided.

The application relates to an LED display screen display non-uniformity adjusting method and system based on image processing, which comprises the following steps: converting the obtained real-time multi-source physical state parameters into a two-dimensional pixel-level feature map through spatial interpolation mapping; obtaining a transient environmental deviation matrix, combining a cumulative lighting duration map to obtain a long-acting aging deviation matrix; weighting and fusing the two to obtain an overall deviation matrix, and generating a target update instruction set according to the comparison result of the regional gray variance of the overall deviation matrix and a preset gradient threshold; in response to the instruction set, superimposing a preset static reference correction matrix and the overall deviation matrix to generate a preliminary dynamic correction matrix, and performing boundary smoothing processing on the preliminary dynamic correction matrix through a spatial edge-preserving filtering algorithm to obtain an adaptive target correction coefficient matrix; finally, mapping and converting a video source data frame and the matrix point by point into an actual driving signal rendering output. The application can improve the accuracy of LED display screen display non-uniformity adjustment.

The utility model relates to a kind of optical waveguide with double-sided coupling-out structure. Including: waveguide substrate, coupling-in unit, first coupling-out unit and second coupling-out unit, coupling-in unit and first coupling-out unit are located in the first surface of waveguide substrate, second coupling-out unit is set in the second surface of waveguide substrate opposite to first coupling-out unit, and second coupling-out unit is high-reflection-efficiency diffraction structure.Coupling-in unit is configured to couple image light into the waveguide substrate, part of the image light is diffracted by the first coupling-out unit, and the remaining light is reflected by the second coupling-out unit when it reaches the second coupling-out unit.

The utility model discloses an optical reflecting film and a vehicle-mounted display device. The optical reflecting film comprises a plurality of reflecting modules; each reflection module comprises a plurality of reflection units, each reflection unit is used for reflecting the image light to the position of the focus corresponding to each reflection unit, and the focuses of the plurality of reflection units uniformly cover the first emergent area and the second emergent area; therefore, the image light reflected by the plurality of reflection units uniformly covers the first display area and the second display area. The optical reflecting film reflects the image light to the focus position corresponding to each reflecting unit through the plurality of reflecting units in each reflecting module, and the focuses of each reflecting unit are uniformly distributed in the first display area and the second display area, so that the image light is prevented from being projected out of the display areas; the light beam energy utilization rate of the optical reflection film is improved, the display uniformity of the image light in the display area is improved, and then the user experience is improved.

The invention discloses a control assembly and method for preparing a multilayer optical gradient structure, and the method comprises the steps: providing a substrate which comprises one or more grating structure regions; providing at least two target source materials, and arranging the target source materials above the substrate; providing a control assembly, placing the control assembly between the target source material and the substrate, and attaching the control assembly to the surface of the substrate; at least two material layers are formed on any area of the grating structure area by adjusting the positions of the target source material relative to the first through hole and the second through hole, and the thickness of each material layer is gradually reduced in the target direction; the target direction is a direction in which a first through hole used for forming the material layer points to a second through hole used for forming the material layer. Therefore, the continuous thickness change of the multi-layer optical gradient structure can be accurately controlled.

The application discloses an array substrate and a display panel. The array substrate comprises a substrate and a driving circuit layer on the substrate, wherein the driving circuit layer is provided with a pixel circuit and a light-emitting control signal line, the pixel circuit comprises a driving transistor, a first initialization transistor and a first connecting part, the first connecting part is connected between the first electrode of the driving transistor and the first initialization transistor, the first connecting part and the light-emitting control signal line have an overlapping part in the orthographic projection on the substrate, the orthographic projection of a shielding part provided in the driving circuit layer on the substrate overlaps with the overlapping part, the film layer where the shielding part is located is between the film layer where the light-emitting control signal line is located and the film layer where the first connecting part is located, and / or at least one organic insulating layer is arranged between the film layer where the first connecting part is located and the film layer where the light-emitting control signal line is located, and / or the thickness of the insulating layer between the two is greater than 3 microns. The technical scheme of the application improves the display uniformity of the display panel.

The embodiment of the invention provides a display substrate and a display. The display substrate comprises a first source-drain metal structure and a channel layer, the first source-drain metal structure comprises a first metal layer, a work function adjusting layer and a second metal layer; wherein the work function of the work function adjusting layer is larger than that of the first metal layer, and the first metal layer and the second metal layer are metal layers made of the same material; the first metal layer is arranged on one side, far away from the substrate, of the channel layer, the work function adjusting layer is arranged on one side, far away from the substrate, of the first metal layer, and the second metal layer is arranged on one side, far away from the substrate, of the work function adjusting layer; the first metal layer is provided with an interval space, and the work function adjustment layer is in contact with one side, away from the substrate, of the channel layer through the interval space; wherein the work function of the channel layer is smaller than that of the work function adjusting layer, and the work function of the channel layer is smaller than that of the first metal layer. And the display uniformity of the display is improved.

The invention relates to an array substrate and a preparation method thereof, and a display panel. The array substrate comprises a first transistor and a substrate; the buffer layer is positioned on one side of the substrate; the first metal layer is located on the side, away from the substrate, of the buffer layer, the first metal layer comprises a first grid electrode of the first transistor, the first grid electrode comprises a first surface, a convex body extending in the direction away from the substrate is formed on the first surface, the convex body has a first orthographic projection on the substrate, and the first surface located outside the convex body has a second orthographic projection on the substrate; the active layer is located on the side, away from the substrate, of the first metal layer, the active layer comprises an active structure, the active structure comprises a channel region, at least part of the channel region and at least part of the first grid electrode are oppositely arranged, and the orthographic projection of the first part of the active structure on the substrate at least partially covers the first orthographic projection; and a second metal layer comprising a first pole of the first transistor, the first pole of the first transistor comprising a second surface facing the substrate, the second surface being in contact with the second portion.

The embodiment of the invention provides a display panel and a display device. The display panel comprises a substrate and a first metal layer located on one side of the substrate, and the first metal layer comprises a first metal part and a second metal part which are connected with each other; the first metal part comprises a plurality of first exhaust holes, the second metal part comprises a plurality of second exhaust holes, and the arrangement mode of the plurality of first exhaust holes is different from the arrangement mode of the plurality of second exhaust holes. According to the invention, the voltage drop of transmission signals of the first metal layer can be reduced, the display uniformity is improved, the risk of film stripping of large-area metal can be reduced, and the product performance reliability is improved.

The invention discloses a pixel circuit, a driving method thereof and a display panel. The pixel circuit comprises a light emitting module, a driving module, a coupling module, a second voltage transmission unit and a voltage interval unit. The second voltage transmission unit is connected between the first power supply and the first end of the driving module, and the second voltage transmission unit is used for transmitting the voltage of the first power supply to the first end of the driving module in a compensation stage; the first end of the coupling module is connected with the control end of the driving module; the voltage interval unit is connected between the second end of the driving module and the second end of the coupling module, and the voltage interval unit is used for conducting in the compensation stage, so that the first power supply charges the coupling module, and the threshold voltage of the driving module is written into the second end of the coupling module. Through a charging type compensation mode, the discrete type of the threshold voltage of the driving module is compensated, the compensation of the positive bias or the negative bias of the threshold voltage is realized, the display uniformity is improved, and the display effect is improved.

The present invention provides a display panel and a display device, in which a data signal is written into a driving transistor in a sub-pixel through a first signal line during a data writing phase; the first signal line is reused during at least a part of a non-data writing phase, and a power signal is transmitted through the first signal line and a second signal line, thereby indirectly reducing a voltage drop problem when the second signal line transmits a power signal alone, ensuring that the power signals received by each sub-pixel are infinitely consistent, thereby improving the display uniformity of the display panel, and ultimately improving the display effect of the display panel.

This application discloses a display panel and an electronic device. The display panel includes a substrate and light-emitting devices. The light-emitting devices of the display panel include a first light-emitting device and a second light-emitting device with two different emitting colors. Since the luminous efficiency of a single light-emitting unit in the first light-emitting device is lower than that of a single light-emitting unit in the second light-emitting device, this application improves the overall luminous efficiency of the first light-emitting device by including at least two light-emitting units stacked and connected in series, thereby reducing the power consumption of the first light-emitting device. Furthermore, the number of light-emitting units in the second light-emitting device is less than that in the first light-emitting device to reduce the difference in luminous efficiency between the two devices. This avoids excessively low driving current for the second light-emitting device at low grayscale levels, thereby improving the display uniformity of the display panel at low grayscale levels.

The present application discloses a display panel driving method, a driving circuit and a display panel, wherein the display panel driving method comprises the steps of: monitoring whether the display panel meets a preset refresh condition; if the preset refresh condition is met, driving all pixel electrodes in the display panel to be short-circuited by a refresh driving signal, and disconnecting after a first preset time. Driving all pixel electrodes in the display panel to be short-circuited by a refresh driving signal, and disconnecting after a first preset time, so that all pixel electrodes are at the same potential, and when the pixel electrodes are subsequently charged, the voltage error can be reduced, thereby improving the display uniformity of the display panel.