391 results about "Dark spot" patented technology

The invention relates to a display panel and a display device. The display panel comprises a substrate, a plurality of light-emitting units and a plurality of packaging parts, the isolation structure is arranged on the substrate, a plurality of isolation openings are defined by the isolation structure, and the light-emitting units are at least partially located in the corresponding isolation openings; the plurality of light-emitting units comprise a first light-emitting unit and a second light-emitting unit which are adjacent and have different light-emitting colors; the packaging part comprises a main body part and an extension part, the main body part is arranged on one side, deviating from the substrate, of the corresponding light-emitting unit and the side wall of the isolation opening, and the extension part is arranged on one side, deviating from the substrate, of the isolation structure; the plurality of packaging parts comprise a first packaging part and a second packaging part which are adjacent to each other, the first packaging part corresponds to the first light-emitting unit, the second packaging part corresponds to the second light-emitting unit, and the orthographic projection of the extension part of the first packaging part on the substrate is overlapped with the orthographic projection of the extension part of the second packaging part on the substrate. Therefore, according to the display panel and the display device provided by the invention, the dark spot problem of the display panel can be improved.

The invention relates to the technical field of display screen defect detection, and discloses a mobile phone display screen defect detection method, device and equipment and a storage medium, and the method comprises the steps: collecting display images of a to-be-detected mobile phone display screen at a plurality of observation angles; the reflection intensity distribution of the display image is analyzed by using polarization optical characteristics, and a de-reflection image is generated after surface reflection components are separated; transforming the pixel brightness of each observation angle in the de-reflection image to a unified reference viewpoint to obtain a unified reference viewpoint image, and extracting a first defect feature vector of each pixel in the unified reference viewpoint image; and fusing the first defect feature vectors extracted from multiple observation angles to obtain a second defect feature vector, comparing the second defect feature vector with a preset threshold, and outputting a defect detection report. According to the application, multi-angle information advantages are utilized, and a defect classification mechanism based on RGB channel response differences is established; and various defect types of bright spots, dark spots, color cast and line defects can be accurately distinguished.

The embodiment of the invention provides a display panel, a preparation method of the display panel and electronic equipment, and relates to the technical field of display, the display panel comprises a substrate, a pixel defining layer, an isolation structure and a light emitting unit, the pixel defining layer is provided with a plurality of pixel openings, the isolation structure comprises a first isolation structure, and the light emitting unit comprises a second isolation structure. The first isolation structure is enclosed to form a plurality of isolation openings, and the plurality of isolation openings are arranged along a first direction; the light emitting colors of the light emitting units located in the same isolation opening are the same, and at least two pixel openings in the multiple pixel openings located in the same isolation opening are arranged in the second direction. According to the invention, the problem of electric leakage between the light-emitting units and the problem of dark spots of the light-emitting units are not easy to generate.

The invention is suitable for the technical field of display equipment, and provides a display panel, a manufacturing method of the display panel and a display device. The isolation structure is arranged on one side of the substrate, and an isolation opening is defined by the isolation structure; the light-emitting layer is arranged on one side of the substrate, and the light-emitting layer comprises a plurality of light-emitting units which are arranged at intervals; the packaging layer is arranged on the side, away from the substrate, of the light-emitting layer, the packaging layer comprises a plurality of packaging units, main body parts of the packaging units cover the surfaces of the sides, away from the substrate, of the light-emitting units, the first extension parts are located on the sides, away from the substrate, of the isolation structures, and the first extension parts and the isolation structures are arranged at intervals; and the cushion layer is arranged on the side, away from the substrate, of at least part of the isolation structure, and the orthographic projection contour of the cushion layer on the isolation structure is at least partially overlapped with the orthographic projection contour of the first extension part on the isolation structure. According to the display panel, the problem that dark spots appear on the light-emitting units can be avoided, and the display effect of the display panel is improved.

The invention relates to the technical field of image recognition, in particular to a horticultural product fungal disease image recognition system and method, and the system comprises an image collection module, an image segmentation module, an anomaly detection module, a feature extraction module, a disease recognition module and a decision output module. In the prior art, the intensity of a light supplementing lamp is manually adjusted, and instantly changing illumination conditions (such as cloud layer shielding and tree shadow shaking) are difficult to deal with in an open-air plantation, so that leaf scab details are often submerged by strong light or dim light is blurred; according to the scheme, a closed-loop linkage system of ambient light perception and an annular LED is innovatively deployed, and the light supplementing intensity is reversely adjusted in a millisecond level by tracking ambient brightness in real time, so that purple gray hyphae of downy mildew in mist in the morning and anthracnose black spots under the noon burning sun present completely consistent color saturation and texture definition in imaging; and the problem of misdiagnosis caused by illumination fluctuation in the traditional method is thoroughly solved.

The invention provides a screen assembly and a display device, relates to the technical field of display, and can reduce the possibility that a screen generates black spots or die marks. The screen assembly comprises a screen and a camera decorating part. The screen is provided with at least one through hole. The camera decorating part comprises an outer decorating part, an inner decorating part and at least one force release boss. The outer trim body is located on the display side of the screen, and the inner trim body is located on the back side of the screen. The at least one force release boss is contained in the at least one through hole. The at least one force release boss is arranged on the inner decorating part main body, and the distance between the at least one force release boss and the outer decorating part main body is a second distance, or the at least one force release boss is arranged on the outer decorating part main body, the distance between the at least one force release boss and the inner decorating part main body is a second distance, and the second distance is smaller than the first distance; therefore, in the process that the camera decorating part moves towards the screen under the impact of external force, the decorating part can be prevented from impacting the screen by means of the force relief boss before the decorating part is in contact with the screen.

The invention provides a display panel and a preparation method thereof and a display device.The display panel comprises a substrate, an isolation structure, a light-emitting unit and a conductive structure, the isolation structure is arranged on one side of the substrate, a first opening is defined by the isolation structure, and the light-emitting unit is arranged in the first opening; the light-emitting unit comprises a first electrode, a light-emitting layer and a second electrode which are sequentially arranged in a stacked mode in the direction away from the substrate, and the second electrode is electrically connected with the isolation structure through a conductive structure. According to the display panel provided by the invention, the conductive structure is arranged, and the second electrode is electrically connected with the isolation structure through the conductive structure, so that a new effective electron injection transmission path is added between the second electrode and the isolation structure, and the electrical connection effect between the second electrode and the isolation structure is improved; therefore, poor connection between the second electrode and the isolation structure is avoided, pixel dark spots are further avoided, and the display performance of the display panel is improved.

The embodiment of the invention provides a dimming device, a preparation method and a dimming structure, is used for reducing the risk that black spots appear on the dimming device, and relates to the technical field of display. The preparation method of the dimming device comprises the following steps: forming a first laminated structure; forming a rubber frame on one side of the first laminated structure; a second laminated structure is attached to the side, away from the first substrate, of the rubber frame; laminating the first laminated structure, the rubber frame and the second laminated structure; injecting liquid glue into the first gap through the at least one first opening; and curing the liquid glue to form a second adhesive layer. The dimming device is used for adjusting the light transmittance.

The utility model discloses a display substrate, a pixel arrangement structure and a display device. The display substrate comprises a substrate body, a pixel limiting layer and a light-emitting device layer, the display substrate comprises a plurality of sub-pixels and is divided into a plurality of sub-pixel groups, and each sub-pixel group comprises a first color sub-pixel, a second color sub-pixel and a third color sub-pixel. The pixel openings of the third color sub-pixels of each sub-pixel group include M sub-pixel openings, and the pixel defining layer includes partition portions located between the M sub-pixel openings. The light-emitting function layers of the third color sub-pixels of the two adjacent sub-pixel groups in the first direction are integrated into a shared light-emitting function layer, and the shared light-emitting function layer of the two adjacent sub-pixel groups in the first direction comprises 2M sub-light-emitting parts located in the sub-pixel openings of the third color sub-pixels. The pixel openings are subjected to block design, the problem of dark spots can be solved, and the pixel aperture ratio can be increased by sharing the light-emitting functional layer.

The invention provides a display panel, a preparation method thereof and a display device. The display panel comprises a substrate; the transparent conducting layer is located on one side of the substrate, and the transparent conducting layer comprises a first transparent wire and a second transparent wire; the first transparent wires are located in the main display area, and the second transparent wires are located in the light-transmitting display area. The first metal layer is located on the side, away from the substrate, of the first transparent wire, the first metal layer comprises a first metal wire, and the first metal wire is located in the main display area and electrically connected with the first transparent wire; the sub-pixels are located on the side, away from the substrate, of the first metal layer and located in the main display area and the light-transmitting display area; wherein the sub-pixels located in the main display area are electrically connected with the first metal wires, and the sub-pixels located in the light-transmitting display area are electrically connected with the second transparent wires. According to the display panel, the transparent conducting layer is moved downwards, so that the over-etching condition of the transparent conducting layer is improved, and the problem of pixel dark spots caused by disconnection of the transparent conducting layer in the light-transmitting display area is solved.

The invention discloses an outdoor dot matrix display screen picture flaw detection method, device and system based on texture features and a server. According to the method, at least two pure color test pictures are obtained, and defect full-coverage detection is realized by utilizing sensitivity differences of different color channels; besides, multi-scale feature extraction is carried out based on a Gabor filter, so that scale features such as single-point dead pixels, regional dark spots and module-level distortion can be captured, and multiple types of flaws such as brightness deviation and large-area uneven brightness can be covered. According to the method, the detection rate of traditional leak detection scenes such as small dead pixels and color deviation is increased to 95% or above, the environment robustness is high, the false detection rate in the complex illumination and vibration environment is low, and a high-reliability automatic defect detection solution is provided for the field of outdoor advertisements and public display.

The invention relates to a display panel, a manufacturing method thereof and a display device. The display panel comprises a substrate, an isolation structure, a light-emitting function part, a conductive connection part and a first electrode part. The isolation structure is arranged on one side of the substrate and defines a first opening; the light-emitting function part is arranged in the first opening; the conductive connecting part is arranged in the first opening; the conductive connection part is located at the edge of the light-emitting function part and is connected with the isolation structure; the first electrode part is arranged on the side, away from the substrate, of the light-emitting function part and connected with the conductive connecting part, so that the first electrode part can be electrically connected with the isolation structure through the conductive connecting part, the reliability of connection between the first electrode part and the isolation structure can be improved, the probability that the display panel displays dark spots can be reduced, the poor display of the display panel is improved, and the display effect of the display panel is improved. And the display quality of the display panel is improved.

The invention discloses a graph pattern generation method based on a Clarii graph, and relates to the technical field of information, and the method comprises the steps: constructing an extended fluorescent material calibration module, introducing a saturation critical light intensity reference value, and carrying out the calibration of the Clarii graph under the dual constraints of color temperature deviation distribution and brightness standard deviation; according to the method, the pattern contrast change condition is recognized through the adjusted pattern contrast, a correction index is formed, the LED backlight wavelength is corrected for the second time according to the correction index, pattern structure deviation information is fed back to a spectrum control link, and the color uniformity of the LED backlight is improved. According to the scheme, on the premise of ensuring uniform fluorescence response and inhibiting bright spots, dark spots and stripes, the Clariy pattern can be kept stable, clear and layered in an actual application environment.

The invention discloses a dark spot repairing method, a display panel and a display device.The dark spot repairing method comprises the steps that dark spot pixels in the display panel are determined, the display panel comprises a substrate, and each dark spot pixel comprises a first electrode, a light-emitting material layer and a second electrode which are sequentially arranged in a stacked mode in the direction away from the substrate; a laser pattern is generated, the laser pattern comprises a plurality of laser sub-patterns which are arranged in a nested mode from inside to outside, and the energy of the laser sub-patterns is smaller than the ablation energy of the second electrode; and irradiating the second electrode of the dark pixel by using the laser pattern so as to repair the dark pixel. According to the dark spot repairing method provided by the invention, the dark spot repairing effect can be improved, and the dark spot repairing efficiency can be improved.

The invention discloses a display panel, a preparation method of the display panel and a display device. The display panel comprises a substrate, an isolation structure, a light-emitting layer, a first electrode layer and a packaging part. When the light-emitting layer is prepared, the light-emitting layer generates a large fall on the edge of the isolation structure and is difficult to connect, so that the light-emitting layer is broken, the light-emitting layer is broken to form the light-emitting units which are mutually disconnected and located in the isolation opening, a precise mask plate does not need to be adopted, development and use of the precise mask plate can be reduced, and the preparation cost is reduced. At least part of the packaging part comprises a first sub-layer, a protective layer and a second sub-layer, and the first sub-layer, the protective layer and the second sub-layer are of a three-layer structure, so that the packaging part has larger thickness, the packaging capability and the anti-etching capability of the packaging part are improved, and the light-emitting units with different light-emitting colors are prepared step by step; in the prior art, over-etching damage is easily caused to a packaging part corresponding to a prepared light-emitting unit, so that the prepared light-emitting unit is etched and dark spots are generated.

The invention is suitable for the technical field of display equipment, and provides a display panel, a manufacturing method thereof and a display device.The manufacturing method comprises the steps that a main body material is arranged on one side of a substrate, a first auxiliary material is added to form an isolation structure comprising preset elements, and an isolation opening is defined by the isolation structure; a light-emitting layer and a packaging layer are arranged on the side, away from the substrate, of the isolation structure; the light-emitting layer and the packaging layer are etched to form a light-emitting unit and a packaging unit in the isolation opening, and the packaging unit at least covers at least part of the surface of the isolation structure. According to the manufacturing method, a gap between the packaging unit and the isolation structure can be avoided, or the packaging unit can be prevented from falling off from the isolation structure, and the packaging effect on the isolation structure is enhanced, so that the light-emitting unit under the packaging unit can be prevented from being damaged in the subsequent manufacturing process, the structure integrity of the light-emitting unit can be kept, and the light-emitting efficiency is improved. Dark spots are avoided, and the display effect of the display panel is improved.

The invention discloses a super-diffraction dark spot microscopic imaging method based on nonlinear focal spot competition. The hollow light beams with different wavelengths are subjected to incoherent overlapping in a focus area, the double hollow light beams generate excitation photon nonlinear absorption competition in a fluorophore peripheral overlapping area, super-diffraction dark spots are finally generated in a focal plane, and stable fluorescence signals are formed in a small-size signal detection area. A target signal is extracted through a weak signal locking amplification technology. The optical diffraction limit is broken through, so that high-precision positioning of the to-be-observed object in the diffraction limit area becomes possible. The optical power needed by the system is low, the detection sensitivity is high, the device structure is simple, and the system is suitable for high-resolution observation in the fields of biomedicine, nano materials and the like.

The utility model discloses vehicle color-changing developing glass which comprises a placement seat, connecting rings are fixedly arranged at the two ends of the placement seat, and a first support and a second support are fixedly arranged at the bottom ends of the two connecting rings respectively. According to the vehicle color-changing developing glass, different electrochromic pixel points are controlled by the electrochromic driving module to change colors differently, so that bright spots and dark spots of images are formed, color image output is achieved through the color electrochromic film, a traditional vehicle-mounted projection curtain can be replaced, independent pixel units are segmented according to needs, and the color-changing developing glass is convenient to use. Each pixel unit is independently driven, so that electrically-induced on-off of different pixel units is achieved, different bright pixel points are formed, images are integrally output in a laminated mode, colorful patterns are output through a colorful electrochromic film, a master control is set to be in a transparent or sun-shading mode in the driving process, and the master control can be switched to be in an imaging mode in the vehicle stopping state such as resting or camping. And a plurality of program setting modes are provided.

The application discloses a kind of winding lithium battery pole piece, lug and the defect detection method and system of glue, method includes: the detection image of the winding battery cell to be detected is collected, and then the detection image is adaptively threshold segmented, and the pole piece detection area and lug detection area are obtained;Size measurement and light and dark spot detection are carried out on the lug detection area, and the lug defect detection result is obtained;Color extraction is carried out on the detection image, and the glue detection area is obtained, and then the glue detection area is defect detected, and the glue defect detection result is obtained;Region extraction is carried out on the pole piece detection area, and the pole piece near area and pole piece far area are obtained, and then the pole piece near area and pole piece far area are defect detected, and the pole piece defect detection result is obtained.The different defects of the pole piece, lug and glue can be accurately detected, the overkill rate is significantly reduced while not missing detection, the loss caused by scrapped overkill battery is reduced, and the application can be widely used in battery detection technical field.

The application is suitable for the technical field of display device, and provides a display panel, a manufacturing method thereof and a display device. The manufacturing method comprises the following steps: a main material is arranged on one side of a substrate, and a first auxiliary material is added to form an isolation structure comprising a preset element, and the isolation structure surrounds an isolation opening; a light-emitting layer and an encapsulation layer are arranged on the side of the isolation structure away from the substrate; and the light-emitting layer and the encapsulation layer are etched to form a light-emitting unit and an encapsulation unit in the isolation opening, and the encapsulation unit covers at least part of the surface of the isolation structure. The manufacturing method can avoid a gap between the encapsulation unit and the isolation structure or the encapsulation unit falling off from the isolation structure, and the encapsulation effect of the isolation structure is enhanced, so that damage to the light-emitting unit under the encapsulation unit in the subsequent manufacturing process can be prevented, the light-emitting unit can maintain a complete structure and dark spots can be avoided, and the display effect of the display panel is improved.

A display panel and a display apparatus. The display panel comprises a plurality of pixel units. Each pixel unit comprises a first color sub-pixel, a second color sub-pixel, and a third color sub-pixel. The area of a light-emitting region of the second color sub-pixel and the area of a light-emitting region of the third color sub-pixel are both smaller than the area of a light-emitting region of the first color sub-pixel. Each sub-pixel comprises a first electrode, a light-emitting layer, and a second electrode. In a same pixel unit, color sub-pixels of the same type comprise one first electrode. In at least one pixel unit, the light-emitting region of the first color sub-pixel comprises a plurality of first sub-light-emitting regions arranged at intervals, and the first electrode of the first color sub-pixel comprises a plurality of first sub-electrodes arranged in one-to-one correspondence with the plurality of first sub-light-emitting regions. Configuring the first electrode of the first color sub-pixel to comprise a plurality of first sub-electrodes in a same pixel unit is beneficial for reducing the probability of dark spot defects while achieving a high pixel aperture ratio of the sub-pixel.

An α-Ga2O3 semiconductor film according to the present invention has a measurement point (dark spot) with a maximum emission intensity A of not more than 0.6 times the average value X of top 5% of the maximum emission intensities A at all measurement points in intensity mapping of plane cathodoluminescence, wherein the maximum emission intensity A at each measurement point is determined in the wavelength range of 250 to 365 nm.

The application relates to a fiber panel for cultural and creative products and a preparation method and application thereof. The fiber panel comprises a plurality of optical fibers arranged in an array, the optical fiber comprises a core and a cladding layer; the core has a refractive index of 1.66-1.68; the cladding layer is coated outside the core; the cladding layer has a refractive index of 1.50-1.52, and the expansion coefficient of the cladding layer is 2-5*10 ‑7 (1 / DEG C) lower than that of the core; the method comprises the following steps: taking a glass rod with a refractive index of 1.66-1.68 as core material, nesting a glass tube with an expansion coefficient of 2-5*10 ‑7 (1 / DEG C) lower than that of the core material and matching the diameter of the core material rod as sheath material, hot melting to obtain a preform rod; performing fiber drawing and arrangement on the preform rod to obtain a multifilament rod; and performing bundling, plate drawing, mechanical processing and optical processing on the multifilament rod to obtain the fiber panel. The technical problem to be solved is to make the fiber panel free of dark spot defects with a diameter of 150 microns or above, free of chicken wire defects with a length of more than 2 mm, shear distortion less than or equal to 100 microns, snake distortion less than or equal to 100 microns, and image displacement less than or equal to 280 microns.

The utility model discloses a display module and electronic equipment. The display module comprises a display layer, a supporting layer and a circuit board which are sequentially stacked, the display layer comprises a display area, a non-display area and a bending area, the non-display area surrounds the display area, and the non-display area is connected with the circuit board through the bending area; the non-display area is provided with a first identifier for determining the relative position of the circuit board and the display layer; the first identification is located on the side, close to the supporting layer, of the non-display area, the supporting layer is provided with a through hole used for exposing the first identification, and the through hole is spaced from the peripheral face, away from the display area, of the non-display area. In the scheme, due to the fact that the through hole is spaced from the peripheral face of the non-display area, the supporting layer does not form a cantilever beam structure around the through hole, and the reliability of connection between the supporting layer and the display layer near the through hole can be improved. In the falling or warm stamping process of the display module, the display layer is not prone to generating black spots, and poor display is avoided.

The present invention discloses a display substrate and a display panel. The display substrate includes: a substrate having a display area, a punching area, and a critical area disposed between the display area and the punching area. In the direction from the display area to the punching area, the critical area includes a first isolation column area, a barrier wall, and a second isolation column area arranged in sequence. The first isolation column area has at least one first isolation column, and the side wall of the first isolation column facing the display area is covered with an insulating layer. Thus, the occurrence of black spot defects in the display area can be reduced through the setting of the insulating layer, and the display effect can be improved.

This utility model relates to a locking and fixing device for optical films in an F-fold TV backlight module, comprising an elastic locking component hidden within the cavity of the F-fold back panel. The elastic locking component includes a side plate, with integrally formed spring tabs at its upper and lower ends. Each spring tab includes an elastic clamping portion and an elastic pressing portion located at the free end of the elastic clamping portion. A clamping groove is formed between the elastic clamping portions of the two spring tabs, used to elastically clamp the sides of the stacked optical film and diffuser plate. The outer surface of the side plate is bonded and fixed to the inner wall of the F-fold back panel cavity via an adhesive layer. The elastic pressing portions of the two spring tabs respectively press against the top and bottom walls of the F-fold back panel cavity. This utility model effectively prevents the optical film and diffuser plate from shaking back and forth during transportation or vibration testing, avoiding problems such as black spots caused by contact between the film and the LCD panel, vibration white spots caused by contact with the laminating auxiliary materials, and film detachment, thereby significantly reducing the product defect rate.

The invention relates to a light-emitting device, a preparation method thereof and a display pole plate. The light-emitting device comprises a first electrode, a light-emitting layer and a second electrode which are sequentially stacked. The first electrode comprises a first transparent conductive layer and a second transparent conductive layer which are sequentially stacked in the direction away from the light-emitting layer, multiple metal layers located between the first transparent conductive layer and the second transparent conductive layer, and interval conductive layers located between every two adjacent metal layers. Wherein the activity of the interval conducting layer is lower than that of the metal layer. According to the invention, dark spots of the light-emitting device caused by puncture of the light-emitting layer and the second electrode due to the fact that the metal layer is corroded by corrosive gas to generate large foreign particles can be avoided.

The invention discloses a display panel, a preparation method thereof and a display device, and relates to the technical field of display. A first wiring layer of a power wiring in the display panel is provided with a first target area exposed by a through groove area of a first organic film layer, and the orthographic projection of a third material layer, located in the first target area, of the first wiring layer on a substrate is located in the orthographic projection of a second material layer on the substrate. The orthographic projection of the second material layer, located in the first target area, of the first wiring layer on the substrate is located in the orthographic projection of the first material layer on the substrate. Therefore, a packaging film layer subsequently formed by the display panel can be prevented from generating cracks in the first target area, and then water and oxygen are prevented from invading the display area along an invasion channel generated by the cracks. According to the scheme, the light emitting effect of the pixel units in the display area can be guaranteed, the display area is prevented from generating black spots, the yield of the display panel is high, and the display effect of the display panel is good.

The invention provides a display panel and a preparation method thereof.The display panel comprises a first protection layer, the first protection layer is arranged on the side, away from a substrate, of a pixel definition layer, and the orthographic projection of the first protection layer on the substrate is located in the orthographic projection of a second color light-emitting layer and an isolation structure on the substrate; the area, corresponding to the first protection layer, on the pixel definition layer is prevented from being etched to form a pit, so that the cathode film forming continuity is prevented from being influenced, cathode open circuit and dark spot formation are avoided, and the display effect of the display panel is improved.

The present application discloses a display panel, a manufacturing method thereof, and a display device. The display panel has a display area and a non-display area and includes a substrate, a isolation part, and a packaging layer. The isolation part is located in the non-display area and is disposed on one side of the substrate; the packaging layer is located on the side of the substrate where the isolation part is provided, and the packaging layer covers the isolation part and the substrate; wherein, the packaging layer includes a first inorganic layer and a second inorganic layer which are stacked, the first inorganic layer includes a first magnetic attraction part, the second inorganic layer includes a second magnetic attraction part, a positive projection of the first magnetic attraction part on the substrate at least partially overlaps with a positive projection of the second magnetic attraction part on the substrate, and polarities of the first magnetic attraction part and the second magnetic attraction part are opposite. By the above solution, the probability of interlayer peeling in the packaging layer of the non-display area of the display panel, specifically the border area, is reduced, and the probability of problems such as bubbling and black spots occurring in the display panel is reduced.