CN115132101A - Pixel structure, system and packaging method for increasing display pixels - Google Patents
Pixel structure, system and packaging method for increasing display pixels Download PDFInfo
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Abstract
The application relates to the technical field of display, and provides a pixel structure, a system and a packaging method for increasing display pixels, which comprise the following steps: the light emitting part, the optical microstructure layer is located the light-emitting side of light emitting part, and the optical microstructure layer includes the lens array that corresponds the setting with the light emitting part, and wherein the lens array includes a plurality of lenses. The problem of because the display structure form is too few in the pixel in unit area among the prior art thus lead to the not high resolution ratio of display panel is solved.
Description
The present application claims the benefit of the prior application with the following application numbers: 202111114755.0, application date is: priority of 23/9/2021.
Technical Field
The present application relates to the field of display technologies, and more particularly, to a pixel structure, a system, and a packaging method for increasing display pixels.
Background
With the development of light emitting technology, light emission is used not only for illumination but also for display. With the popularization of displays, consumers have higher and higher requirements on the brightness and the picture quality of display screens. The display effect of the display screen has a great relationship with the resolution of the display screen, the resolution is the number of the pixel points in one picture displayed in the display screen, the more the number of the pixel points is, the finer the picture is, and the higher the quality of the picture is. For example, the picture quality of the lcd depends on the displayed pixels, and the pixel density of the lcd must be increased to make the picture quality of the lcd finer and finer. Increasing the pixel density of the display screen can be achieved by increasing the total number of pixels in a unit area of the display screen. The existing color display screen is a pixel display unit formed by at least three luminous sources with different colors, and a plurality of same pixel display units form the display surface of the color display screen in a matrix form.
Generally, a pixel display unit adopts a red light emitting source, a green light emitting source and a blue light emitting source, different light emitting sources emit light according to different display pictures, and the emitted light forms a single pixel point.
Accordingly, there is a need for improvements and developments in the art.
Disclosure of Invention
An object of the present application is to provide a pixel structure, a system and a packaging method for increasing display pixels, which solve the problem in the prior art that the resolution of a display panel is not high due to too few pixels in a unit area in a display structure form.
In order to achieve the purpose, the technical scheme adopted by the application is as follows:
the application provides a pixel structure for increasing display pixels, comprising: a light-emitting section for emitting light from a light-emitting element,
the optical microstructure layer is positioned on the light emitting side of the light emitting part and comprises a lens array which is arranged corresponding to the light emitting part, wherein the lens array comprises a plurality of lenses;
in one embodiment, the pixel structure further comprises: an encapsulation layer disposed outside the light emitting part and covering the light emitting part;
the optical microstructure layer is positioned on the packaging layer.
In one embodiment, the optical micro-structured layer is located on an outer surface of the encapsulation layer;
or
The optical microstructure layer is positioned inside the packaging layer.
In one embodiment, one surface of the optical micro-structure layer, which faces away from the light-emitting part, is an arc-shaped surface, and the lenses in the lens array are arranged along the arc-shaped surface;
or alternatively
The surface of the optical micro-structure layer, which is far away from the light-emitting part, is a plane, and the lenses in the lens array are arranged along the plane.
In one embodiment, the plurality of lenses are distributed on the lens array in a central symmetry.
In one embodiment, the plurality of lenses are distributed in a regular hexagon on the lens array;
or
The plurality of lenses are distributed in a rectangular shape on the lens array.
In one embodiment, the distance between the light emitting portion and the lens array ranges not more than 2 mm.
In one embodiment, the light-emitting side of the optical micro-structural layer is provided with a phosphor layer.
In one embodiment, the light emitting portion is an LED chip.
On the other hand, based on the same conception, the application also provides a system for increasing display pixels, which comprises LED lamp beads, a lens array and a display screen, wherein the lens array and the display screen are sequentially arranged along the light path direction of the LED lamp beads;
the lens array comprises a plurality of lenses, the lenses are arranged on one side, close to the LED lamp beads, of the lens array, one LED lamp bead corresponds to the lenses, and the lenses are used for modulating a single-point light source output by the LED lamp beads into a multi-point light source and forming a plurality of pixel points on the display screen.
In one embodiment, an antireflection film is arranged on one side of the lens array, which is far away from the LED lamp beads.
In a third aspect, based on the same concept, the present application further provides a method for increasing the number of display pixels, where the method includes:
fixing the light emitting part on the support part;
welding wires on the pins of the light emitting part and the supporting part;
and sealing the light emitting part, and forming an optical microstructure layer on the sealing adhesive layer or inside the sealing adhesive layer, wherein the optical microstructure layer comprises a lens array which is arranged corresponding to the light emitting part, and the lens array comprises a plurality of lenses.
The pixel structure, the system and the packaging method for increasing the display pixels have the advantages that: by arranging the optical microstructure layer on the light emitting side of the light emitting part, when light emitted by the light emitting part passes through the lens array of the optical microstructure layer, coherent cancellation is generated on a transmission path through emergent light emitted by each lens, and finally a plurality of fine points are formed on a screen. The light source module comprises a light source, a plurality of lenses, a plurality of light points, a plurality of lens arrays, a plurality of light sources, a plurality of lens arrays and a plurality of light sources.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of an optical principle of a pixel structure for increasing display pixels according to a first embodiment of the present invention;
fig. 2 is a schematic view of a principle that an LED lamp bead in a system for adding display pixels according to a second embodiment of the present invention is installed;
fig. 3 is a schematic diagram of a principle that an LED lamp bead in a system for increasing display pixels is inverted according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a pixel structure for increasing display pixels according to a third embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of another form of increasing a pixel structure of a display pixel according to a third embodiment of the present disclosure;
fig. 6 is a schematic cross-sectional profile of an optical micro-structure layer formed by inverse imprinting for increasing the pixel structure of a display pixel according to a third embodiment of the present application;
fig. 7 is a top view of an optical micro-structural layer for increasing a pixel structure of a display pixel according to a third embodiment of the present application;
fig. 8 is a flowchart illustrating a method for increasing the number of display pixels according to an embodiment of the present disclosure.
Wherein, in the figures, the respective reference numerals:
1. LED lamp beads; 2. a lens array; 3. a display screen; 31. a lens; 100. a light emitting section; 200. an optical micro-structured layer; 300. a packaging layer; 400. a phosphor layer.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly or indirectly secured to the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second" and "first" are used merely for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.
In the conventional display panel, an LED display panel is taken as an example, wherein an LED chip is used as a light emitting portion to form one sub-pixel (pixel), and three sub-pixels form one display pixel. An optical film, such as an antireflection film, is separately provided on the outer side of the LED chip. Not only because the light that the LED chip sent forms single pixel, lead to the pixel in the unit area too few, the not high problem of display panel's resolution ratio, when assembling, still need to match optical film (optical layer) and LED chip and set up moreover, increased the assembly degree of difficulty, greatly reduced production efficiency. In order to improve the above problems, the following solutions are proposed:
example one
As shown in fig. 1, the present embodiment provides a pixel structure for increasing display pixels, including: a light emitting section 100 and an optical microstructure layer 200. The light emitting part 100 is used for emitting bright light after being powered on, the optical microstructure layer 200 is located on the light emitting side of the light emitting part 100, the optical microstructure layer 200 includes a lens array 2 arranged corresponding to the light emitting part 100, wherein the lens array 2 includes a plurality of lenses 31; as shown in fig. 5, the single light emitting part 100 corresponds to the plurality of lenses 31, the scattered light emitted by the single light emitting part 100 passes through the plurality of lenses 31 to form emergent light, the emergent light is subjected to coherent cancellation at the light emitting side, and finally a plurality of fine dots are formed on the screen, so that a plurality of groups of emergent light can form a plurality of pixels. The phenomenon of coherent cancellation is that a beam of light emitted from the same point or a very small area (which can be regarded as a point light source) on the same light source is divided into two beams, and the two beams meet after passing through different propagation paths, at this time, the frequency and the vibration direction of the light split from the same beam are the same, the phase difference at the meeting point is also constant, and finally, a plurality of fine points are formed on a screen.
As shown in fig. 1, by disposing the optical micro-structure layer 200 on the light emitting side of the light emitting part 100, when the light emitted from the light emitting part 100 passes through the lens array 2 of the optical micro-structure layer 200, the emitted light emitted through each lens generates coherent cancellation on the propagation path (principle is shown in fig. 5), and finally a plurality of fine dots are formed on the screen. The light source module is equivalent to an original point light source, and a plurality of fine bright spots are obtained on a screen after passing through a lens array of an optical micro-structure layer, so that a single-point light source emitted by the light emitting part 100 is modulated into a multi-point light source emitted by a plurality of lenses 31, and a pixel point corresponding to a light emitting point of the original light emitting part 100 is changed into a plurality of pixel points corresponding to a plurality of light emitting points through the plurality of lenses 31.
As shown in fig. 2, the optical micro-structure layer 200 in the present embodiment may be disposed spaced apart from the light emitting part 100; as shown in fig. 2 and 5, the optical micro-structure layer 200 may be connected to the light-emitting part 100.
EXAMPLE two (this example is that of the previous patent application)
Referring to fig. 1-3, a system for adding display pixels (hereinafter referred to as the present structure) includes an LED lamp 1, a lens array 2, and a display screen 3. The luminous body 100 is an LED lamp bead 1. One side of the LED lamp bead 1 is provided with the lens array 2, and through the matching of the LED lamp bead and the lens array, light emitted by the LED lamp bead 1 passes through the lens array 2 to form a plurality of pixel points, and in the invention, the LED lamp bead 1 adopts external power supply equipment to supply power. Therefore, in order to realize the above functions, the system has the following connection relationship: the lens array and the display screen are sequentially arranged along the light path direction of the LED lamp beads, and on the basis of the connection relation, divergent light emitted by the LED lamp beads is modulated by the lens 31 on the lens array 2, and then the modulated light is projected onto the display screen 3 to form pixel points.
It should be noted that the more the pixel points formed on the display screen 3 are in a unit area, the higher the resolution is, and of course, macroscopically, each pixel has a color and a change rule which need to be displayed according to image driving. Therefore, the preferred embodiment of the structure of the present invention can improve the resolution of the pixel.
The display effect of the LED display screen has a great relationship with the resolution of the display screen, the resolution is the number of display points contained in a unit area of one picture displayed in the LED display screen, the more the number of the display points contained in the picture is, the finer the picture is, and the higher the quality of the picture is. Therefore, the display effect can be improved through the structure.
The picture quality of the LED display screen depends on the displayed pixel points, and the pixel density of the display screen needs to be increased to make the picture quality of the display screen more and more exquisite. Increasing the pixel density of the display screen can be accomplished by increasing the total number of pixel sites in the display screen.
In order to increase the pixel point that single LED lamp pearl throws on the display screen to increase pixel and promote picture quality: one side of the lens array, which is close to the LED lamp beads, is provided with a plurality of lenses, a single LED lamp bead corresponds to a plurality of lenses, scattering light emitted by one LED lamp bead forms a plurality of groups of light through focuses of the lenses, and the plurality of groups of light form a plurality of pixel points on the display screen.
According to the invention, the lens array is provided with the plurality of lenses on one side of the LED lamp bead, the lens array separately projects incident light and forms a plurality of pixel points on the display screen, the pixel density of the display screen is increased, the picture quality of the display screen becomes fine and smooth, the display effect is achieved, and the requirement of a user on high display precision is met.
Referring to fig. 1-3, the shape of the lens is not limited in particular, and may be spherical, rectangular or other relatively regular shapes; in consideration of the manufacturing process, in order to make the lens array easier to manufacture, in this embodiment, the lenses on the lens array may be in a raised spherical crown structure.
It is worth explaining that the LED packaging structure is suitable for the forward mounting and the inverted mounting structure of the LED, and the applicability is wide.
To minimize the volume occupied by the structure when pixels are added, thereby miniaturizing and lightening the structure.
In some embodiments of the present invention, a specific structure for achieving the above effects is: lens are in be central symmetric distribution on the lens array, central symmetric distribution makes the space area that occupies when arranging at a plurality of this structures very little, compact structure, and has promoted the utilization ratio to light, and is energy-concerving and environment-protective.
In some embodiments of the invention, the lenses are distributed in a regular hexagon over the lens array. When lens are regular hexagon and arrange, the scattering light that LED lamp pearl launches passes through the focus of six lenses, thereby turn into six groups of light with light, every group light forms a pixel on the display screen, so six groups of light can form six pixels on the display screen, and simultaneously, also can additionally set up a lens in regular hexagon inside, thereby increase the utilization ratio of the light that LED lamp pearl launches, further promote the quantity of pixel, thereby promote the display quality.
In some embodiments of the invention, the lenses are distributed rectangularly over the lens array. When four lenses are arranged in a rectangular shape, scattering light rays emitted by one LED lamp bead pass through the focuses of the four lenses, so that the light rays are converted into four groups of light rays, each group of light rays form a pixel point on the display screen, and the four groups of light rays can form four pixel points on the display screen.
Simultaneously, also can additionally set up a lens in the rectangle inside to increase the utilization ratio of the light that LED lamp pearl launches, further promote the quantity of pixel, thereby promote display quality.
As a further improvement of the above scheme, an antireflection film is arranged on one side of the lens array close to the display screen.
The antireflection film is an optical coating with a wide application range, can be used as an anti-dazzle and anti-static film for a display and a computer vision protection screen, has wide market prospect, can improve the mechanical property and the optical property of a matrix of a lens array, and can increase the physical property to a certain extent.
As a further improvement of the scheme, the distance range between the LED lamp beads and the lens array is not more than 2 mm.
In this embodiment, the distance D between the LED lamp bead and the lens array is 50 micrometers, 2 millimeters, and 0.975 millimeters, each corresponding to a shaped lens.
For example, when the refractive index of the lens is 1.5, the distances correspond to lens radii of 25 μm, 1 mm and 0.4875 mm, and the distances therebetween can be adjusted according to different use requirements, so as to control the space occupied by the whole structure.
As a further improvement of the above, the lens array is a microlens array.
The micro lens array is an array formed by lenses with micron-sized clear aperture and relief depth, has basic functions of focusing, imaging and the like of the traditional lens, and has the characteristics of small unit size and high integration level. The use of microlens arrays enables functions that cannot be performed by conventional large-scale optical elements to be performed and enables many new types of optical systems to be constructed. The laser wavefront can be spatially divided into a plurality of tiny parts, each part is focused on a focal plane by a corresponding small lens, and a plane consisting of a series of focal points can be obtained by a series of micro lenses. If the wavefront is an ideal planar wavefront, a uniform and regular set of focal distributions can be obtained at the focal plane of the microlens array. In this scheme, the structure can be miniaturized by the micro lens array so as to be applied to different occasions.
As shown in fig. 2-3, the present invention also provides an LED display including the above system for adding LED display pixels.
In the use of LED display, through with the divergent light modulation of the sending of lens array with LED lamp pearl, form the pixel on the display screen, consequently form a plurality of pixels on the display screen, the pixel density of demonstration increases, and display screen quality becomes fine and smooth, has display effect's advantage, has satisfied user's high display accuracy's requirement.
EXAMPLE III
Referring to fig. 1, 4 and 5, the present embodiment provides a pixel structure for increasing display pixels, including: a light emitting part 100, an optical micro-structure layer 200, and an encapsulation layer 300. The Light Emitting part 100 is configured to emit Light after being powered on, the packaging layer 300 is disposed outside the Light Emitting part 100 and covers the Light Emitting part 100, and the Light Emitting part 100 may adopt an LED chip (Light Emitting Diode chip) or other Light Emitting chips, such as a MINI-LED chip, an OLED chip, a Micro-LED, and the like. These luminescence chips all have small, generate heat little advantage, are fit for using as the pixel for the display. The optical micro-structure layer 200 is disposed on the encapsulation layer 300, and the light emitting portion 100 is encapsulated by the encapsulation layer 300, so that the optical structure can be fixed on the encapsulation layer 300, thereby forming an individual pixel module. The optical microstructure layer 200 is located on the light emitting side of the light emitting portion 100, the optical microstructure layer 200 includes a lens array 2 disposed corresponding to the light emitting portion 100, wherein the lens array 2 includes a plurality of lenses 31; as shown in fig. 5, the single light emitting part 100 corresponds to the plurality of lenses 31, the scattered light emitted by the single light emitting part 100 passes through the plurality of lenses 31 to form emergent light, the emergent light is subjected to coherent cancellation at the light emitting side, and finally a plurality of fine dots are formed on the screen, so that a plurality of groups of emergent light can form a plurality of pixels.
The light emitting part 100 in this embodiment can form the LED lamp bead structure in the second embodiment through the package layer 300, and the difference between this embodiment and the second embodiment is that the lens array 2 in the optical micro-structure layer 200 in this embodiment is disposed in the package layer 300 or on the surface of the package layer 300. And the lens array 2 in the second embodiment is arranged on the outer side of the LED lamp bead.
The application provides an increase display pixel's pixel structure's beneficial effect lies in at least: by disposing the optical micro-structure layer 200 on the light-emitting side of the light-emitting part 100, when the light emitted from the light-emitting part 100 passes through the lens array 2 of the optical micro-structure layer 200, the emitted light emitted through each lens generates coherent cancellation on the propagation path (principle is shown in fig. 1), and finally a plurality of fine dots are formed on the screen. The light source module is equivalent to an original point light source, and a plurality of fine bright spots are obtained on a screen after passing through a lens array of an optical micro-structure layer, so that a single-point light source emitted by the light emitting part 100 is modulated into a multi-point light source emitted by a plurality of lenses 31, and a pixel point corresponding to a light emitting point of the original light emitting part 100 is changed into a plurality of pixel points corresponding to a plurality of light emitting points through the plurality of lenses 31. And combine together the setting with optics microstructured layer 200 and packaging layer 300, make optics microstructured layer 200 and luminescent part 100 form a whole, can directly carry out display panel's equipment as a good complete module of encapsulation when using, need not install luminescent part 100 and optics microstructured layer 200 respectively, made things convenient for the assembly greatly to production efficiency has been improved, display panel's quality has been guaranteed.
For the position of the optical micro-structure layer 200, the present application proposes a plurality of schemes, specifically as follows:
in position one, as shown in fig. 4 a and b, the optical micro-structure layer 200 is located on the outer surface of the encapsulation layer 300. The optical micro-structure layer 200 may be a part of the encapsulation layer 300 by being disposed on the outer surface of the encapsulation layer 300, or may be attached and fixed on the outer surface of the encapsulation layer 300. In the present embodiment, the optical micro-structure layer 200 is taken as an example of a part of the package layer 300, and the surface of the optical micro-structure layer 200 is taken as a light emitting surface of the package layer 300. The light emitted by the light emitting element sequentially passes through the packaging layer 300 and the optical microstructure layer 200 and then is emitted, and the emergent light emitted by each lens generates coherence cancellation on a propagation path under the action of the plurality of lenses 31 in the optical microstructure layer 200.
The optical micro-structure layer 200 is arranged on the outer surface of the packaging layer 300, so that positive stamping can be directly carried out on the surface of sealing glue in the process of packaging the light-emitting element, and the optical micro-structure layer and the packaging layer 300 are integrally formed, and the production is convenient.
Position two
As shown in fig. 5 c and d, the optical micro-structure layer 200 is located inside the encapsulation layer 300. Thus the optical micro-structure layer 200 can be molded inside the encapsulation layer 300 as a part of the encapsulation layer 300; or the optical micro-structure layer 200 may be separately disposed and then packaged, so that the optical micro-structure layer 200 is packaged inside the package layer 300. The light emitted by the light-emitting element passes through the optical micro-structure layer 200, and is focused and emitted outwards through the action of the plurality of lenses 31 in the optical micro-structure layer 200, and then emitted from the surface of the packaging layer 300; the optical microstructure layer 200 is disposed inside the package layer 300 to realize internal packaging, and the optical structure therein can be protected by the package layer 300 outside, and is integrated with the led chip for convenient subsequent arrangement.
In addition, other arrangement manners may also be to separate the optical micro-structure layer 200 from the encapsulation layer 300, and locate the optical micro-structure layer outside the encapsulation layer 300 and spaced a distance from the encapsulation layer 300. After the light emitting part 100 in the package layer 300 emits light, the light can still irradiate the optical microstructure on the outer side, so that the light can be split by the plurality of lenses 31 in the optical microstructure to form a multi-pixel function.
On the basis of all the above solutions, the outline of the optical micro-structure layer 200 may be set in various forms, specifically as follows:
in the first form, as shown in fig. 4 b and fig. 5 d, a surface of the optical micro-structure layer 200 facing away from the light-emitting portion 100 is an arc surface, and the lenses 31 in the lens array 2 are arranged along the arc surface.
In the second form, as shown in a of fig. 4 and c of fig. 5, the surface of the optical micro-structure layer 200 facing away from the light-emitting part 100 is a plane, and the lenses 31 in the lens array 2 are arranged along the plane.
As shown in fig. 7, on the basis of all the solutions, in order to improve the display effect, a plurality of lenses 31 are distributed on the lens array 2 in a central symmetry manner. The central symmetry distribution of the lenses 31 ensures that the space occupied by the plurality of lens 31 structures when the lenses are arranged is very small, the structure is compact, and the utilization rate of light rays is improved.
The plurality of lenses 31 in the present embodiment are distributed in a regular hexagon on the lens array 2. When the lenses 31 are arranged in a regular hexagon, the light emitting portion 100 may be disposed on an extension line of the position of the middle point of the regular hexagon surrounded by the six lenses 31. The scattered light emitted from one light emitting part 100 passes through the focal points of the six lenses 31, thereby converting the light into six groups of light, each group of light can form one pixel point, and the six groups of light can form six pixel points.
Or a plurality of lenses 31 are distributed in a rectangular shape on the lens array 2. The lenses 31 are distributed in a rectangular shape on the lens array 2. When the lenses 31 are four lenses arranged in a rectangular shape, the light emitting portion 100 may be provided on an extension line of the center position of the rectangle surrounded by the four lenses 31. As shown in fig. 5, the scattered light emitted from one light emitting part 100 passes through four lenses 31, so that the light is converted into four groups of emergent light, and the emergent light interferes and destructively interferes, so that the four groups of light can form a bright spot area and a dark area on the screen, and the bright spot area is equivalent to a new pixel point.
The shape of the lens 31 in this embodiment is not particularly limited, and may be a sphere, a cuboid, or other relatively regular shape; in order to make the lens array 2 easier to manufacture due to the manufacturing process, in the embodiment, the lenses on the lens array 2 may be protruded spherical crown structures.
The distance range between the light emitting portion 100 and the lens array 2 in this embodiment is not more than 2 mm. The light emitting part 100 employs an LED chip, and the distance range between the LED chip and the lens array 2 is not more than 2 mm. Since the lenses 31 in the lens array 2 are distributed in a central symmetry, it can be understood that the distance from the light emitting surface of the light emitting section 100 to the focal point of each lens 31 is not more than 2 mm. In the present embodiment, the distances D between the LED chip and the lens array 2 are 50 micrometers, 2 millimeters, and 0.975 millimeters, each corresponding to one shaped lens. For example, when the refractive index of the lens is 1.5, the distances correspond to lens radii of 25 μm, 1 mm and 0.4875 mm, and the distances therebetween can be adjusted according to different use requirements, so as to control the space occupied by the whole structure.
As shown in fig. 5 c, a phosphor layer 400 may be provided as needed. If the LED needs to be converted into a monochromatic light source, the LED needs to be coated with fluorescent powder, and if the LED needs to emit three colors of light, the LED can be not coated with the fluorescent powder. When the phosphor layer 400 is needed, the phosphor layer 400 is disposed on the light-emitting side of the optical micro-structure layer 200. After the fluorescent powder layer 400 is adopted, the LEDs in other wave bands can be prepared by utilizing the advantage of high luminous efficiency of the LEDs in certain wave bands, so that the luminous efficiency of the wave bands is improved. For example, when the efficiency of light emission of an LED of a certain color is low, the light emission efficiency of the LED of the color may be improved by the phosphor layer 400, thereby improving the color quality.
Based on the same concept, as shown in fig. 1, the present application also proposes a display panel, which includes a substrate, the above-mentioned encapsulated pixel structure, and a display screen 3; the packaging pixel structures are arranged in a plurality of numbers, and the packaging pixel structures are arranged on the substrate. The encapsulated pixel structures may be in groups of three to form a display pixel, the three encapsulated pixel structures emitting red, green, and blue light, respectively. A plurality of display pixels are provided on the substrate, a display screen 3 is provided on the light exit side of the lens array 2, and pixel light is displayed on the display screen, whereby a display panel can be formed. In the use of the display manufactured based on the display panel, the divergent light emitted by the light emitting part is modulated by the lens array, and a plurality of bright spots can be formed on the display screen through the coherent cancellation process of light, so that a plurality of pixel points are formed on the display screen, the displayed pixel density is increased, the quality of a display picture becomes fine and smooth, the display panel has the advantage of display effect, and the requirement of high display precision of a user is met.
As shown in fig. 8, the present application further provides a packaging method for increasing the number of display pixels, so as to form the above-mentioned packaged pixel structure. Wherein, including the step:
step S100, the light emitting part is fixed on the supporting part.
In the specific process, the light emitting part is an LED chip and provides a supporting part, the supporting part is a plate body or a chip support, and the LED chip is fixed on the substrate or the chip support, so that the die bonding process is realized.
Step S200, wire bonding is performed on the light emitting part. And bonding wires after the LED chip is connected with the supporting part, so that the LED chip forms pins and is in circuit connection with the supporting part.
In the specific process, different processes can be adopted to form the optical microstructure according to different positions of the optical microstructure layer. When the optical microstructure is located on the surface of the encapsulation layer, a lens array of the optical microstructure can be prepared by imprinting. In the specific process, after the wires are welded, sealing glue is adopted, and the optical microstructure layer is prepared while the sealing glue is used.
For example, after dispensing, the optical microstructure layer is prepared by imprinting, and a lens array is formed on the surface of the sealant layer. The lenses in the optical microstructure layer can be arranged along a plane or an arc-shaped plane. The regularly arranged lens array can be arranged in a rectangular shape or a hexagonal shape and is centrosymmetric. As shown in a and b of fig. 4, the imprinting manner may adopt a positive imprinting process to mold the lens in the optical micro-structural layer into a convex lens on the surface of the encapsulation layer. As shown in e and f in fig. 6, the stamping manner may be a reverse stamping process, and a concave structure is formed on the surface of the encapsulation layer; the reverse embossing is another form of surface embossing, namely, concave surfaces are pressed down, light can be condensed for the light emitting parts, and the light can be split into a plurality of pixels by enabling each single light emitting part (LED chip) to correspond to a plurality of lenses, so that the display effect is improved.
The lens structure is directly formed by impressing on the surface of the packaging layer, materials and processes are saved, the packaging adhesive layer and the microstructure are directly fused to directly serve as a layer of structure and are fixed, and subsequent arrangement and use are facilitated.
When the optical microstructure is located inside the packaging layer, the optical microstructure layer can be formed into a film independently, the optical microstructure layer (lens film) is directly attached to the light emitting part (LED chip), and then the optical microstructure layer and the LED chip are packaged through sealing glue, so that the optical microstructure layer is located in the packaging layer.
The lens array of the optical micro-structure layer is arranged inside and outside the packaging layer, so long as each single LED chip corresponds to a plurality of lenses, pixel light splitting can be carried out on each LED chip, one pixel is converted into a plurality of pixels, and therefore the display effect is improved.
And S400, drying and forming the sealing glue.
Step S500, coating a phosphor layer on a surface of the optical micro-structure layer away from the light emitting portion.
Step S500 is to select whether to coat the surface of the optical micro-structural layer away from the light emitting part with a fluorescent layer according to the requirement. If the LED needs to be converted into a monochromatic light source, the LED needs to be coated with fluorescent powder, and if the LED needs to emit three colors of light, the LED can be not coated with the fluorescent powder.
In summary, the optical microstructure layer is arranged on the light emitting side of the light emitting part, and the optical microstructure layer and the encapsulation layer are combined, so that a light emitting point of the original light emitting part is changed into a plurality of small bright points after a coherence cancellation process is performed on a plurality of light rays passing through a plurality of lenses, and a plurality of pixel points are formed. The optical microstructure layer and the luminous part form a whole, the optical microstructure layer can be directly used as a packaged complete module to assemble the display panel when in use, the luminous part and the optical microstructure layer do not need to be respectively installed, and the assembly is greatly facilitated, so that the production efficiency is improved, and the quality of the display panel is ensured.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A pixel structure for increasing display pixels, comprising: a light-emitting section for emitting light from a light-emitting element,
the optical microstructure layer is positioned on the light emitting side of the light emitting part and comprises a lens array which is correspondingly arranged with the light emitting part, wherein the lens array comprises a plurality of lenses.
2. The pixel structure for adding display pixels of claim 1, further comprising:
an encapsulation layer disposed outside the light emitting part and covering the light emitting part;
the optical microstructure layer is positioned on the packaging layer.
3. The pixel structure of claim 2, wherein the optical micro-structured layer is on an outer surface of the encapsulation layer;
or
The optical microstructure layer is positioned inside the packaging layer.
4. The pixel structure for increasing display pixels of claim 2, wherein a surface of the optical micro-structure layer facing away from the light-emitting portion is an arc surface, and the lenses in the lens array are arranged along the arc surface;
or alternatively
The surface of the optical micro-structure layer, which is far away from the light emitting part, is a plane, and the lenses in the lens array are arranged along the plane.
5. The pixel structure for increasing display pixels of claim 4, wherein a plurality of said lenses are arranged in a central symmetrical distribution on said lens array.
6. The pixel structure for increasing display pixels of claim 5, wherein a distance between the light emitting portion and the lens array is in a range of not greater than 2 mm.
7. The pixel structure for increasing display pixels of claim 1, wherein a phosphor layer is disposed on a light exit side of the optical micro-structure layer.
8. The system for increasing the display pixels is characterized by comprising LED lamp beads, a lens array and a display screen, wherein the lens array and the display screen are sequentially arranged along the light path direction of the LED lamp beads;
the lens array comprises a plurality of lenses, the lenses are arranged on one side, close to the LED lamp beads, of the lens array, one of the LED lamp beads corresponds to the lenses, and the lenses are used for modulating a single-point light source output by the LED lamp beads into a multi-point light source and forming a plurality of pixel points on the display screen.
9. The system for adding display pixels according to claim 8, wherein an antireflection film is disposed on a side of the lens array facing away from the LED lamp bead.
10. A method of increasing the number of display pixels in a package, comprising the steps of:
fixing the light emitting part on the support part;
bonding wires to the light emitting part;
and sealing the light emitting part with glue, and forming an optical microstructure layer on the glue sealing layer or inside the glue sealing layer, wherein the optical microstructure layer comprises a lens array which is arranged corresponding to the light emitting part, and the lens array comprises a plurality of lenses.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111114755.0A CN113763833A (en) | 2021-09-23 | 2021-09-23 | System for increasing LED display pixels |
| CN2021111147550 | 2021-09-23 |
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| CN115132101A true CN115132101A (en) | 2022-09-30 |
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| CN202210967683.2A Pending CN115132101A (en) | 2021-09-23 | 2022-08-12 | Pixel structure, system and packaging method for increasing display pixels |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150015456A1 (en) * | 2012-02-14 | 2015-01-15 | Touoku Univeristy | Multi-display device and display modules |
| CN107994113A (en) * | 2017-11-28 | 2018-05-04 | 西安科锐盛创新科技有限公司 | A kind of high-power blue-ray LED multilayer encapsulation structure |
| CN209690673U (en) * | 2019-03-12 | 2019-11-26 | 佛山市国星光电股份有限公司 | Backlight module and display device with it |
| CN113763833A (en) * | 2021-09-23 | 2021-12-07 | 深圳市光科全息技术有限公司 | System for increasing LED display pixels |
| CN114791683A (en) * | 2021-01-25 | 2022-07-26 | 京东方科技集团股份有限公司 | Light-emitting module, display module and display device |
-
2021
- 2021-09-23 CN CN202111114755.0A patent/CN113763833A/en active Pending
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- 2022-08-12 CN CN202210967683.2A patent/CN115132101A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150015456A1 (en) * | 2012-02-14 | 2015-01-15 | Touoku Univeristy | Multi-display device and display modules |
| CN107994113A (en) * | 2017-11-28 | 2018-05-04 | 西安科锐盛创新科技有限公司 | A kind of high-power blue-ray LED multilayer encapsulation structure |
| CN209690673U (en) * | 2019-03-12 | 2019-11-26 | 佛山市国星光电股份有限公司 | Backlight module and display device with it |
| CN114791683A (en) * | 2021-01-25 | 2022-07-26 | 京东方科技集团股份有限公司 | Light-emitting module, display module and display device |
| CN113763833A (en) * | 2021-09-23 | 2021-12-07 | 深圳市光科全息技术有限公司 | System for increasing LED display pixels |
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