CN117631124A - Display and light guide structure thereof - Google Patents
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- CN117631124A CN117631124A CN202210980718.6A CN202210980718A CN117631124A CN 117631124 A CN117631124 A CN 117631124A CN 202210980718 A CN202210980718 A CN 202210980718A CN 117631124 A CN117631124 A CN 117631124A
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
Abstract
The present disclosure provides a display and a light guide structure thereof. The display comprises a substrate, a light emitting module and a light guide structure. The light emitting module is spaced apart from the substrate. The light guide structure is arranged between the substrate and the light emitting module. The light guide structure comprises a plurality of light guide members. Each light guide member has an asymmetric structure.
Description
Technical Field
The present disclosure relates to a display and a light guiding structure thereof, and more particularly, to a display including a light guiding member and a light guiding structure thereof.
Background
Application displays such as Virtual Reality (Virtual Reality) and augmented Reality (Augmented Reality) require that the light emitting directions of the pixel light sources be concentrated toward the human eye imaging area to improve the visual quality of the human eye. In order to meet the above requirements, as shown in fig. 15, a microlens Array (MLA) 91 is currently used to concentrate the light emitting direction of the light emitting source 92 toward the 0 degree direction (forward direction). However, the MLA 91 is a symmetrical structure, which has a relatively obvious light-emitting control effect on the pixel light-emitting source 92 located in the central area 93 of the display, but the light-emitting control effect on the pixel light-emitting source 92 located further from the central area 93 of the display gradually decreases with increasing distance, especially the light-emitting direction of 0 degree of the pixel light-emitting source 92 located in the edge area 94 of the display hardly reaches the human eye imaging area 95. Accordingly, the display industry is seeking solutions that can ameliorate the above-mentioned deficiencies.
Disclosure of Invention
A display includes a substrate, a light emitting module, and a light guiding structure. The light emitting module is spaced apart from the substrate. The light guide structure is arranged between the substrate and the light emitting module. The light guide structure comprises a plurality of light guide members. Each light guide member has an asymmetric structure.
In some embodiments, the light guiding structure further comprises a central region. The light guide member is arranged at the periphery of the central area and surrounds the central area. The light guide member has a light incident surface, a light emergent surface, and an angle defined by the light incident surface and the light emergent surface. The angle of the light guide increases as the distance between the light guide and the central region increases.
In some embodiments, the light guiding structure further comprises a central region. The light guide member is arranged at the periphery of the central area and surrounds the central area. The light guide member has a light incident surface, a light emergent surface, an included angle defined by the light incident surface and the light emergent surface, and a side surface opposite to the included angle. The height of the side surface of the light guide increases as the distance between the light guide and the central region increases.
In some embodiments, the light guide comprises at least one central light guide and a plurality of outer light guides. The outer light guide member is arranged on the periphery of the central light guide member and surrounds the central light guide member. The external light guide member has a light incident surface, a light emergent surface and an included angle defined by the light incident surface and the light emergent surface. The angle of the outer light guide increases as the distance between the outer light guide and the central light guide increases.
In some embodiments, the light guide comprises at least one central light guide and a plurality of outer light guides. The outer light guide member is arranged on the periphery of the central light guide member and surrounds the central light guide member. The external light guide member is provided with a light incident surface, a light emergent surface, an included angle defined by the light incident surface and the light emergent surface and a side surface opposite to the included angle. The height of the side surface of the outer light guide increases as the distance between the outer light guide and the center light guide increases.
In some embodiments, the light guide member has a light incident surface, a light emergent surface, and an included angle defined by the light incident surface and the light emergent surface. The light incident surface is an inclined surface. The light-emitting surface is a plane.
In some embodiments, the light guide member has a light incident surface, a light emergent surface, an included angle defined by the light incident surface and the light emergent surface, and a side surface opposite to the included angle. The light incident surface is a curved surface. The light-emitting surface is a plane. The side surface is curved.
In some embodiments, the curvature of the side surface is different from the curvature of the light entrance surface.
In some embodiments, the curvature of the side surface is greater than the curvature of the light entrance surface.
In some embodiments, the light guide comprises at least one central light guide and a plurality of outer light guides. The outer light guide member is arranged on the periphery of the central light guide member and surrounds the central light guide member. The cross-sectional shape of the outer light guide is different from the cross-sectional shape of the central light guide.
In certain embodiments, the asymmetric structure comprises an asymmetric prismatic structure.
In certain embodiments, the asymmetric structure comprises an asymmetric lens structure.
In some embodiments, the light guide is disposed on the substrate.
In some embodiments, a light emitting module includes a substrate, a light emitting member, and a package. The light emitting element is arranged on the substrate. The package encapsulates the light emitting member. The light guide is spaced apart from the package.
In some embodiments, the display further comprises an adhesive layer. The adhesive layer bonds the substrate and the light emitting module. The adhesive layer covers the light guide member and the package.
In some embodiments, the refractive index of the adhesive layer is less than the refractive index of the light guide.
In some embodiments, a light emitting module includes a substrate, a light emitting member, and a package. The light emitting element is arranged on the substrate. The package encapsulates the light emitting member. The light guide member is disposed on the package.
In some embodiments, the display further comprises an adhesive layer. The adhesive layer bonds the substrate and the light emitting module. The adhesive layer covers the light guide.
In some embodiments, the refractive index of the adhesive layer is greater than the refractive index of the light guide.
In some embodiments, the light guide comprises at least one central light guide and a plurality of outer light guides. The outer light guide member is arranged at the periphery of the central light guide member. And the outer light guide members are distributed in a plurality of concentric circles outwards by taking the central light guide member as a center.
In some embodiments, the light guide comprises at least one central light guide and a plurality of outer light guides. The outer light guide member is arranged at the periphery of the central light guide member. And the outer light guide members are distributed with respect to the central light guide member as a center and are arranged in left and right directions .
In some embodiments, the light guides are arranged in a matrix.
A light guiding structure includes a central region and a plurality of external light guiding members. The outer light guide is arranged at the periphery of the central area and surrounds the central area. Each external light guide piece is provided with a light incident surface, a light emergent surface and an included angle defined by the light incident surface and the light emergent surface. The angle of the outer light guide increases as the distance between the outer light guide and the central region increases.
In some embodiments, the light incident surface is an inclined surface. The light-emitting surface is a plane.
In some embodiments, the outer light guide further has a side surface opposite the included angle. The light incident surface is a curved surface, the light emergent surface is a plane, and the side surface is a curved surface.
In some embodiments, the curvature of the side surface is different from the curvature of the light entrance surface.
In some embodiments, the curvature of the side surface is greater than the curvature of the light entrance surface.
In some embodiments, the light guide further comprises at least one central light guide. The central light guide is arranged in the central area. The cross-sectional shape of the outer light guide is different from the cross-sectional shape of the central light guide.
In some embodiments, the outer light guide is of asymmetric construction.
A light guiding structure includes a central region and a plurality of external light guiding members. The outer light guide is arranged at the periphery of the central area and surrounds the central area. Each external light guide piece is provided with a light incident surface, a light emergent surface, an included angle defined by the light incident surface and the light emergent surface and a side surface opposite to the included angle. The height of the side surface of the outer light guide increases as the distance between the outer light guide and the central region increases.
In some embodiments, the light incident surface is an inclined surface. The light-emitting surface is a plane.
In some embodiments, the light incident surface is a curved surface. The light-emitting surface is a plane. The side surface is curved.
In some embodiments, the curvature of the side surface is different from the curvature of the light entrance surface.
In some embodiments, the curvature of the side surface is greater than the curvature of the light entrance surface.
In some embodiments, the light guide further comprises at least one central light guide. The central light guide is arranged in the central area. The cross-sectional shape of the outer light guide is different from the cross-sectional shape of the central light guide.
In some embodiments, the outer light guide is of asymmetric construction.
Drawings
FIG. 1 is a cross-sectional view of a display, according to some embodiments.
FIG. 2 is a cross-sectional view of a display, according to some embodiments.
Fig. 3 is an enlarged view of the area a in fig. 1.
Fig. 4 is a light guide path diagram of fig. 3.
Fig. 5 is a light guide path diagram of fig. 1.
FIG. 6 is a cross-sectional view of a display, according to some embodiments.
FIG. 7 is a cross-sectional view of a display, according to some embodiments.
FIG. 8 is a cross-sectional view of a display, according to some embodiments.
Fig. 9 is a cross-sectional view of a display, according to some embodiments.
FIG. 10 is a cross-sectional view of a display, according to some embodiments.
FIG. 11 is a cross-sectional view of a display, according to some embodiments.
Fig. 12 is an enlarged view of area B in fig. 11.
FIG. 13 is a cross-sectional view of a display, according to some embodiments.
FIG. 14 is a top view of a display according to some embodiments.
Fig. 15 is a light guide path diagram of a display according to a comparative embodiment.
Description of the drawings
1. Display device
1' display
1a display
1b display
1c display
1d display
1e display
1f display
1g display
1h display
10. Substrate and method for manufacturing the same
11. Upper surface of
12. Lower surface of
13. Side surfaces
20. Light emitting module
21. Substrate board
23. Package body
24. Bonding pad
30. Light guide structure
31. Center light guide
32. External light guide
33. Optical path adjusting layer
35. Central region
40. Adhesive layer
50. Lens
60. Human eye imaging region
70. Microlens array
91. Microlens array
92. Luminous light source
93. Center area of display
94. Edge area of display
95. Human eye imaging region
211. Upper surface of
212. Lower surface of
213. Side surfaces
22a luminous element
22b illuminant piece
22c luminous element
30' light guide structure
30a light guide structure
30d light guide structure
30f light guide structure
30h light guide structure
31d central light guide
31f center light guide
31h center light guide
32d external light guide
32f external light guide
32h external light guide
321. Light incident surface
322. Light-emitting surface
323. Side surfaces
32c external light guide
351. First region
352. Second region
321d light incident surface
321f light incident surface
322d light-emitting surface
322f light-emitting surface
323d side surface
323f side surface
h 1 Height
h 2 Height
h 3 Height
n 1 Refractive index of the package
n 2 Refractive index of adhesive layer
n 3 Refractive index of the light guide
n 4 Refractive index of substrate
n 5 Refractive index of air
R 1 First optical path
R 2 Second optical path
R 3 Third optical path
θ 1 Included angle
θ 2 Included angle
θ 3 Included angle
θ f1 Included angle
θ f2 Included angle
θ f3 Included angle
Detailed Description
The following disclosure provides many different embodiments, or examples, for implementing different features of the application. Specific examples of components and arrangements are described below to simplify the present disclosure. These are, of course, merely examples and are not intended to limit the application. For example, the following description of forming a first feature over or on a second feature may include embodiments in which first and second features are formed in direct contact, and may also include embodiments in which other features are formed between the first and second features, such that the first and second features are not in direct contact. Furthermore, the present application may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or architectures discussed.
Furthermore, the application may use spatially relative terms, such as "under," "below," "lower," "above," "higher," and the like, for example, to describe one element's or feature's relationship to another element's or feature in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be positioned (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the disclosure are approximations, the numerical values set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements. Further, as used herein, "about" generally refers to within 10%, 5%, 1%, or 0.5% of a given value or range. Alternatively, the term "about" refers to within an acceptable standard error of average value considered by one of ordinary skill in the art. Except in the operating/working examples, or where otherwise indicated, all numerical ranges, amounts, values, and ratios of materials, time periods, temperatures, operating conditions, amounts, and the like disclosed herein are to be understood as modified in all instances by the term "about. Accordingly, unless indicated to the contrary, the numerical parameters set forth in the present disclosure and claims are approximations that may vary as desired. Each numerical parameter should at least be construed in light of the number of reported significant digits and by applying ordinary rounding techniques. Ranges can be expressed herein as from one end point to another, or between two end points. Unless specifically stated otherwise, all ranges disclosed herein are inclusive of the endpoints.
Fig. 1 is a cross-sectional view of a display 1, according to some embodiments. Fig. 3 is an enlarged view of the area a in fig. 1. In some embodiments, the display 1 includes a substrate 10, a light emitting module 20, a light guiding structure 30, and an adhesive layer 40. In some embodiments, the display 1 may be a Virtual Reality (Augmented Reality) display, an augmented Reality (View) display, or other application display.
In some embodiments, the substrate 10 is a transparent substrate, such as transparent glass or other suitable substrate. The light transmittance of the substrate 10 may be greater than 85%, such as 85%, 88%, 90%, 93%, 95%, 97%, 98%, or 99%. As shown in fig. 1, the substrate 10 has an upper surface 11, a lower surface 12 opposite to the upper surface 11, and a side surface 13 extending between the upper surface 11 and the lower surface 12. As shown in fig. 3, the substrate 10 has a refractive index n 4 。
In some embodiments, as shown in FIG. 1, the light emitting module 20 includes a substrate 21, light emitting members (including, for example, light emitting member 22a, light emitting member 22b, and light emitting member 22 c), a package 23, and a bonding pad 24.
In some embodiments, the substrate 21 includes a substrate (not shown), a dielectric layer (not shown), and one or more circuits (not shown) disposed on or within the substrate. In some embodiments, the substrate is a non-flexible substrate, and the material of the substrate may include silicon, glass, quartz, or other suitable material. In some embodiments, the substrate is a flexible substrate, and the material of the substrate may include transparent epoxy, polyimide, polyvinyl chloride, methyl methacrylate, or other suitable materials. The dielectric layer may be optionally disposed on the substrate. In some embodiments, the dielectric layer may comprise silicon oxide, silicon nitride, silicon oxynitride, or other suitable material. In some embodiments, the circuit may comprise a Complementary Metal Oxide Semiconductor (CMOS) circuit, a Low Temperature Polysilicon (LTPS) circuit, or a plurality of transistors and capacitors adjacent to the transistors, wherein the transistors and capacitors are formed on the dielectric layer. In some embodiments, the transistor is a thin-film transistor (TFT). Each transistor includes a source/drain region (including at least a source region and a drain region), a channel (channel) region between the source/drain regions, a gate electrode disposed over the channel region, and a gate insulator between the channel region and the gate electrode. The channel region of the transistor may be made of a semiconductor material, such as silicon or other elements selected from group IV or group III and group V. In some embodiments, the substrate 21 has an upper surface 211, a lower surface 212 opposite the upper surface 211, and a side surface 213 extending between the upper surface 211 and the lower surface 212.
The light emitting members (e.g., light emitting member 22a, light emitting member 22b, and light emitting member 22 c) are provided on the substrate 21 (e.g., upper surface 211). The light emitting members (e.g., light emitting member 22a, light emitting member 22b, and light emitting member 22 c) may be electrically connected to the substrate 21 and driven by the circuitry of the substrate 21. In some embodiments, the light emitting elements (e.g., light emitting elements 22a, 22b, and 22 c) may be organic light-emitting diodes (OLEDs), micro-LEDs (micro LEDs or mini LEDs), quantum dot LEDs (QLEDs), or other suitable light emitting elements. In some embodiments, the light emitting members (e.g., light emitting member 22a, light emitting member 22b, and light emitting member 22 c) may emit light of different wavelengths. In some embodiments, light 22a may emit red light (e.g., light having a wavelength between 620nm and 780 nm), light 22b may emit green light (e.g., light having a wavelength between 500nm and 580 nm), and light 22c may emit blue light (e.g., light having a wavelength between 400nm and 500 nm). In some embodiments, the light emitting elements 22a, 22b and 22c can form a pixel, and the color of the pixel can be determined by the intensity of the light emitted by the light emitting elements 22a, 22b and 22c, so the display 1 does not need a filter layer. If the light emitting elements 22a, 22b and 22c emit monochromatic light, such as white light, a filter layer may be formed on the lower surface 12 of the substrate 10. The filter layer can be a pigment color film or a color quantum dot conversion layer.
The package 23 is disposed on the substrate 21 (e.g., the upper surface 211), and encapsulates the light emitting elements (e.g., the light emitting element 22a, the light emitting element 22b, and the light emitting element 22 c). The package 23 is a transparent material such as a transparent resin, silicon nitride, or other suitable material. The light transmittance of the encapsulant 23 may be greater than 85%, such as 85%, 88%, 90%, 93%, 95%, 97%, 98%, or 99%. As shown in fig. 3, the package 23 has a refractive index n 1 。
In some embodiments, as shown in FIG. 1, bond pads 24 are disposed on substrate 21 (e.g., upper surface 211) and may electrically connect the circuitry of substrate 21. The bond pads 24 may be used to connect to external control circuitry.
In some embodiments, as shown in fig. 1, the light guiding structure 30 is disposed between the substrate 10 and the light emitting module 20. In some embodiments, the light guiding structure 30 includes a central region 35 and a plurality of light guiding members (including at least one central light guiding member 31 and a plurality of outer light guiding members 32). In some embodiments, the light guides of the light guide structure 30 (including, for example, the central light guide 31 and the outer light guide 32) may be disposed on the substrate 10 (e.g., the lower surface 12), with the central region 35 of the light guide structure 30 corresponding to the geometric center of the substrate 10. In some embodiments, the light guides (e.g., the central light guide 31 and the outer light guide 32) of the light guide structure 30 are spaced apart from the package 23 of the light emitting module 20. That is, the light guides (e.g., the center light guide 31 and the outer light guide 32) of the light guide structure 30 do not contact the package 23 of the light emitting module 20.
In some embodiments, the central light guide 31 is disposed in the central region 35. In some embodiments, the central light guide 31 is a transparent material, such as a transparent resin or other suitable material. The light transmittance of the central light guide 31 may be greater than 85%, such as 85%, 88%, 90%, 93%, 95%, 97%, 98%, or 99%. In some embodiments, as shown in fig. 1, the number of central light guides 31 may be plural.
Fig. 2 is a cross-sectional view of a display 1' according to some embodiments. The display 1' of fig. 2 has a similar structure to the display 1 of fig. 1, except that: the configuration of the light guiding structure 30 'of the display 1' of fig. 2. In some embodiments, as shown in fig. 2, the light guide of the light guide structure 30' may omit the central light guide 31.
In some embodiments, as shown in fig. 1 and 2, the outer light guide 32 is disposed about the periphery of the central region 35 (e.g., including the central light guide 31 or not including the central light guide 31) and surrounds the central region 35 (e.g., including the central light guide 31 or not including the central light guide 31). In some embodiments, as shown in fig. 1 and 2, the outer light guide 32 is distributed in a plurality of concentric circles about a central region 35 (e.g., including the central light guide 31 or not including the central light guide 31). In some embodiments, the outer light guides 32 are symmetrically distributed outwardly about a central region 35 (e.g., including the central light guide 31 or not including the central light guide 31). In some embodiments, as shown in fig. 1 and 2, the outer light guides 32 may be spaced apart from each other.
In some embodiments, the outer light guide 32 is a transparent material, such as a transparent resin, transparent photoresist, or other suitable material. The light transmittance of the outer light guide 32 may be greater than 85%, such as 85%, 88%, 90%, 93%, 95%, 97%, 98%, or 99%. In some embodiments, as shown in fig. 1 and 2, the cross-sectional shape of the outer light guide 32 may be different from the cross-sectional shape of the central light guide 31. In some embodiments, each of the external light guides 32 may be an asymmetric structure including a structure that is divided in any way that does not satisfy symmetry, such as an asymmetric prismatic structure or an asymmetric lenticular structure.
In some embodiments, as shown in fig. 1, 2 and 3, the external light guide 32 has a light incident surface 321, a light emergent surface 322, and a light emitting surfaceThe angle defined by the light incident surface 321 and the light emergent surface 322 (including, for example, angle θ) 1 Included angle theta 2 Included angle theta 3 ) And an included angle (e.g. included angle theta) 1 Included angle theta 2 Included angle theta 3 ) Opposite side surfaces 323. In some embodiments, the light incident surface 321 may be an inclined surface, the light emergent surface 322 may be a plane, and the side surface 323 may be a vertical surface, so that the light incident surface 321, the light emergent surface 322 and the side surface 323 may form an asymmetric prism structure.
In some embodiments, the angle of the outer light guide 32 (e.g., angle θ 1 Included angle theta 2 Included angle theta 3 ) May increase as the distance between the outer light guide 32 and the central region 35 (e.g., including the central light guide 31 or excluding the central light guide 31) increases, as shown in FIG. 3, the included angle θ 1 Is greater than the included angle theta 2 Included angle theta 2 Is greater than the included angle theta 3 . An angle corresponding to the outer light guide 32 (e.g., angle θ) 1 Included angle theta 2 Included angle theta 3 ) The height of the side surface 323 of the external light guide 32 (including, for example, the height h 1 Height h 2 Height h 3 ) And also increases as the distance between the outer light guide 32 and the central region 35 (including the central light guide 31 or excluding the central light guide 31) increases, as shown in fig. 3, the height h 1 Greater than height h 2 Height h 2 Greater than height h 3 . In addition, the external light guide 32 has a refractive index n 3 。
In some embodiments, as shown in fig. 1 and 2, the adhesive layer 40 bonds the substrate 10 and the light emitting module 20, and the adhesive layer 40 covers the central light guide 31, the outer light guide 32, and the package 23. In some embodiments, the adhesive layer 40 is a transparent material, such as a transparent resin or other suitable material. The light transmittance of the adhesive layer 40 may be greater than 85%, such as 85%, 88%, 90%, 93%, 95%, 97%, 98%, or 99%. In some embodiments, as shown in FIG. 3, the adhesive layer 40 has a refractive index n 2 And refractive index n of adhesive layer 40 2 Less than the refractive index n of the outer light guide 32 3 。
Fig. 4 is a light guide path diagram of fig. 3. FIG. 5 is a diagram1. The light guide Path diagrams of fig. 4 and 5 illustrate in detail the light Path (Optical Path) turning effect of the light guide structure 30 (including, for example, the center light guide 31 and the outer light guide 32). In some embodiments, the refractive index n of adhesive layer 40 2 Can be smaller than the refractive index n of the external light guide 32 3 . In some embodiments, as shown in FIG. 4, when the refractive index n of the package 23 1 Refractive index n of adhesive layer 40 of 2 2 Refractive index n of 1.5 of the external light guide 32 3 1.8 refractive index n of substrate 10 4 Is 1.5 and the refractive index n of air 5 When 1, the light emitting element 22a emits light at 0 degree and sequentially passes through the package 23, the adhesive layer 40 and the included angle θ 1 (e.g., 55 DEG) external light guide 32, substrate 10 and first optical path R of incoming air 1 The light emitting element 22b emits light at 0 degree and sequentially passes through the package 23, the adhesive layer 40 and the included angle θ 2 (e.g., 50 DEG) external light guide 32, substrate 10 and second optical path R for incoming air 2 The light emitting element 22c emits light at 0 degree and sequentially passes through the package 23, the adhesive layer 40 and the included angle θ 3 (e.g., 45 DEG) external light guide 32, substrate 10, and third optical path R for incoming air 3 . According to the above optical parameters, the first optical paths R can be calculated by Snell's Law 1 Turned by about 22 degrees from the 0 degree direction (i.e. normal direction), a second optical path R 2 Turned by about 18 DEG from the 0 DEG direction and a third optical path R 3 Turned approximately 16.3 from the 0 degree direction. As can be seen from fig. 5, the light-emitting paths (including, for example, the first light path R) of the light-emitting elements (including, for example, the light-emitting element 22a, the light-emitting element 22b and the light-emitting element 22 c) in the pixels located at the edge region of the display 1 1 A second optical path R 2 Third optical path R 3 ) Can be diverted by the outer light guide 32 to the human eye imaging area 60 and can be concentrated at the human eye imaging area 60 via the lens 50.
The central light guide 31 in fig. 5 is already disposed at the center of the display 1, so that no additional light turning structure is needed. In some embodiments, the central light guide 31 may be omitted.
Fig. 6 is a cross-sectional view of a display 1a, according to some embodiments. The display 1a of fig. 6 has a similar structure to the display 1 of fig. 1, except that: the structure of the light guiding structure 30a of the display 1a of fig. 6. In some embodiments, as shown in fig. 6, the light guiding structure 30a further includes a light path adjustment layer 33. The optical path adjusting layer 33 is provided between the external light guide 32 and the substrate 10. The optical path adjusting layer 33 is made of a transparent material, such as a transparent resin, a transparent photoresist, or other suitable materials. The light transmittance of the light path adjustment layer 33 may be greater than 85%, for example, 85%, 88%, 90%, 93%, 95%, 97%, 98%, or 99%. In some embodiments, the external light guide 32 may perform a light path change through the light path adjustment layer 33, for example, modulating the refractive index of the light path adjustment layer 33. In some embodiments, the central light guide 31 may be omitted.
Fig. 7 is a cross-sectional view of a display 1b, according to some embodiments. The display 1b of fig. 7 has a similar structure to the display 1 of fig. 1, except that: the direction of the light incident surface 321 of the external light guide 32 of the display 1b of fig. 7. In some embodiments, as shown in fig. 7, the light incident surface 321 of the outer light guide 32 may face the central region 35 or the central light guide 31. In some embodiments, the optical path may be changed by adjusting the refractive index of the adhesive layer 40, the refractive index of the external light guide 32, and the refractive index of the substrate 10. In some embodiments, the display 1b may incorporate a lens structure to alter the light path. In some embodiments, the central light guide 31 may be omitted.
Fig. 8 is a cross-sectional view of a display 1c, according to some embodiments. The display 1c of fig. 8 has a similar structure to the display 1 of fig. 1, except that: the configuration of the external light guide 32c of the display 1c of fig. 8. In some embodiments, as shown in fig. 8, the angles of the outer light guides 32c in the first region 351 may be the same, and the angles of the outer light guides 32c in the second region 352 may be the same. In addition, the outer light guides 32c located within the first region 351 may have a greater included angle than the outer light guides 32c located within the second region 352 due to being farther from the central light guide 31, in some embodiments. In some embodiments, the central light guide 31 may be omitted.
Fig. 9 is a cross-sectional view of a display 1d, according to some embodiments. The display 1d of fig. 9 has a similar structure to the display 1 of fig. 1, except that: the configuration of the light guiding structure 30d of the display 1d of fig. 9. In some embodiments, as shown in fig. 9, a light guiding structure 30d (including, for example, a central light guiding member 31d and an outer light guiding member 32 d) may be disposed on the package 23 of the light emitting module 20. The light incident surface 321d of the external light guide 32d is a plane (different from the light incident surface 321 of fig. 1, which is an inclined plane), the light emergent surface 322d of the external light guide 32d is an inclined plane (different from the light emergent surface 322 of fig. 1, which is a plane), and the side surface 323d of the external light guide 32d is a vertical surface (the same as the side surface 323 of fig. 1, which is a vertical surface). In some embodiments, the light guide structure 30d (e.g., the central light guide 31d and the outer light guide 32 d) may be spaced apart from the substrate 10. That is, the light guide structure 30d (e.g., the center light guide 31d and the outer light guide 32 d) does not contact the substrate 10. In some embodiments, the optical path may be changed by adjusting the refractive index of the adhesive layer 40, the refractive index of the external light guide 32d, and the refractive index of the substrate 10. In some embodiments, the display 1d may incorporate a lens structure to alter the light path. In some embodiments, the refractive index of the adhesive layer 40 may be greater than the refractive index of the outer light guide 32 d. In some embodiments, the central light guide 31d may be omitted.
Fig. 10 is a cross-sectional view of a display 1e, according to some embodiments. The display 1e of fig. 10 has a similar structure to the display 1d of fig. 9, except that: the direction of the light-emitting surface 322d of the external light guide 32d of the display 1e of fig. 10. In some embodiments, as shown in fig. 10, the light-emitting surface 322d of the outer light guide 32d may face the central light guide 31d. In some embodiments, the optical path may be changed by adjusting the refractive index of the adhesive layer 40, the refractive index of the external light guide 32d, and the refractive index of the substrate 10. In some embodiments, the display 1e may incorporate a lens structure to alter the light path. In some embodiments, the refractive index of the adhesive layer 40 may be greater than the refractive index of the outer light guide 32 d. In some embodiments, the central light guide 31d may be omitted.
Fig. 11 is a cross-sectional view of a display 1f, according to some embodiments. Fig. 12 is an enlarged view of area B in fig. 11. The display 1f of fig. 11 has a similar structure to the display 1 of fig. 1, except thatIn the following steps: the cross-sectional shapes of the central light guide 31f and the outer light guide 32f of the light guide structure 30f of the display 1f of fig. 11. In some embodiments, as shown in fig. 11, the cross section of the central light guide 31f is in the shape of an arc. In some embodiments, as shown in fig. 12, the light incident surface 321f of the external light guide 32f is a curved surface (different from the light incident surface 321 of fig. 1 being an inclined surface), the light emergent surface 322f of the external light guide 32f is a plane (same as the light emergent surface 322 of fig. 1 being a plane), and the side surface 323f of the external light guide 32f is a curved surface (different from the side surface 323 of fig. 1 being a vertical surface). The curvature of the side surface 323f of the outer light guide 32f is different from the curvature of the light incident surface 321f of the outer light guide 32 f. In some embodiments, as shown in fig. 12, the curvature of the side surface 323f of the outer light guide 32f may be greater than the curvature of the light entrance surface 321f of the outer light guide 32 f. In some embodiments, the included angle θ of FIG. 12 f1 Can be the same as the included angle theta of figure 3 1 Included angle θ of fig. 12 f2 Can be the same as the included angle theta of figure 3 2 Included angle θ of fig. 12 f3 Can be the same as the included angle theta of figure 3 3 . In some embodiments, the included angle θ of FIG. 12 f1 May be different from the included angle theta of fig. 3 1 Included angle θ of fig. 12 f2 May be different from the included angle theta of fig. 3 2 Included angle θ of fig. 12 f3 May be different from the included angle theta of fig. 3 3 . In some embodiments, the optical path may be changed by adjusting the refractive index of the adhesive layer 40, the refractive index of the external light guide 32f, and the refractive index of the substrate 10. In some embodiments, the display 1f may incorporate a lens structure to alter the light path. In some embodiments, the central light guide 31f may be omitted. In some embodiments, the side surface 323f of the outer light guide 32f may also be a vertical plane.
Fig. 13 is a cross-sectional view of a display 1g, according to some embodiments. The display 1g of fig. 13 has a similar structure to the display 1 of fig. 1, except that: the display 1g of FIG. 13 further includes a Micro-Lens Array (MLA) 70. In some embodiments, as shown in fig. 13, a microlens array 70 may be provided on the package 23 of the light emitting module 20. In some embodiments, microlens array 70 may be spaced apart from light guiding structure 30 (including, for example, central light guide 31 and outer light guide 32). Although the microlens array 70 cannot turn the light-emitting paths of the light-emitting elements (including, for example, the light-emitting element 22a, the light-emitting element 22b, and the light-emitting element 22 c) in the pixels located in the edge region of the display 1g to the human eye imaging region, the light-emitting elements (including, for example, the light-emitting element 22a, the light-emitting element 22b, and the light-emitting element 22 c) can be concentrated on the light-incident surface 321 of the external light guide element 32 by the microlens array 70, and then turned to the human eye imaging region by the external light guide element 32, so that the light path turning and the brightness improving effects can be achieved at the same time. In some embodiments, the central light guide 31 may be omitted.
Fig. 14 is a top view of a display 1h according to some embodiments. The display 1h of fig. 14 has a similar structure to the display 1 of fig. 1, except that: the configuration of the light guiding structure 30h of the display 1h of fig. 14. In some embodiments, as shown in fig. 14, the central light guide 31h and the outer light guide 32h may be arranged in a matrix. In some embodiments, the outer light guides 32h are arranged symmetrically about the center light guide 31 h.
The foregoing outlines features of some embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments of the present application. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure.
Furthermore, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. Those of skill in the art will appreciate from the disclosure of the present disclosure that a process, machine, manufacture, composition of matter, means, methods, or steps, presently existing or later to be developed that perform the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present disclosure. Accordingly, such processes, machines, manufacture, compositions of matter, means, methods, or steps, are included in the claims of the present application.
Claims (36)
1. A display, comprising:
a substrate;
a light emitting module spaced apart from the substrate; and
A light guiding structure disposed between the substrate and the light emitting module, the light guiding structure comprising:
the light guide members are of asymmetric structures.
2. The display of claim 1, wherein the light guiding structure further comprises a central region, the light guiding member is disposed at a periphery of the central region and surrounds the central region, the light guiding member has a light incident surface, a light emergent surface, and an included angle defined by the light incident surface and the light emergent surface, and the included angle of the light guiding member increases with increasing distance between the light guiding member and the central region.
3. The display of claim 1, wherein the light guiding structure further comprises a central region, the light guiding member is disposed at a periphery of the central region and surrounds the central region, the light guiding member has a light incident surface, a light emergent surface, an included angle defined by the light incident surface and the light emergent surface, and a side surface opposite to the included angle, and a height of the side surface of the light guiding member increases with an increase in a distance between the light guiding member and the central region.
4. The display of claim 1, wherein the light guide comprises at least one central light guide and a plurality of outer light guides, the outer light guides being disposed at the periphery of the central light guide and surrounding the central light guide, the outer light guides having a light entrance surface, a light exit surface, and an angle defined by the light entrance surface and the light exit surface, the angle of the outer light guides increasing as the distance between the outer light guides and the central light guide increases.
5. The display of claim 1, wherein the light guide comprises at least one central light guide and a plurality of outer light guides disposed at the periphery of the central light guide and surrounding the central light guide, the outer light guide having a light incident surface, a light exiting surface, an angle defined by the light incident surface and the light exiting surface, and a side surface opposite to the angle, the height of the side surface of the outer light guide increasing as the distance between the outer light guide and the central light guide increases.
6. The display of claim 1, wherein the light guide has a light incident surface, a light emergent surface and an angle defined by the light incident surface and the light emergent surface, the light incident surface is an inclined surface, and the light emergent surface is a plane.
7. The display of claim 1, wherein the light guide has a light incident surface, a light emergent surface, an included angle defined by the light incident surface and the light emergent surface, and a side surface opposite to the included angle, the light incident surface is a curved surface, the light emergent surface is a plane, and the side surface is a curved surface.
8. The display of claim 7, wherein a curvature of the side surface is different from a curvature of the light entrance surface.
9. The display of claim 8, wherein a curvature of the side surface is greater than a curvature of the light entrance surface.
10. The display of claim 1, wherein the light guide comprises at least one central light guide and a plurality of outer light guides disposed about and surrounding a periphery of the central light guide, the outer light guides having a cross-sectional shape that is different than a cross-sectional shape of the central light guide.
11. The display of claim 1, wherein the asymmetric structure comprises an asymmetric prismatic structure.
12. The display of claim 1, wherein the asymmetric structure comprises an asymmetric lens structure.
13. The display of claim 1, wherein the light guide is disposed on the substrate.
14. The display of claim 13, wherein the light emitting module comprises:
a substrate;
a light emitting member provided on the substrate; and
An encapsulant encapsulating the light emitter, wherein the light guide is spaced apart from the encapsulant.
15. The display of claim 14, further comprising:
and an adhesive layer which is used for bonding the substrate and the light emitting module and covering the light guide piece and the packaging body.
16. The display of claim 15, wherein the adhesive layer has a refractive index that is less than a refractive index of the light guide.
17. The display of claim 1, wherein the light emitting module comprises:
a substrate;
a light emitting member provided on the substrate; and
And the packaging body is used for packaging the light emitting piece, wherein the light guide piece is arranged on the packaging body.
18. The display of claim 17, further comprising:
and an adhesive layer which is used for bonding the substrate and the light emitting module and covering the light guide member.
19. The display of claim 18, wherein the adhesive layer has a refractive index greater than a refractive index of the light guide.
20. The display of claim 1, wherein the light guide comprises at least one central light guide and a plurality of outer light guides, the outer light guides being disposed at the periphery of the central light guide and the outer light guides being distributed in a plurality of concentric circles about the central light guide.
21. The display of claim 1, wherein the light guide comprises at least one central light guide and a plurality of outer light guides, the outer light guides being disposed at the periphery of the central light guide and the outer light guides being symmetrically distributed laterally outwardly about the central light guide.
22. The display of claim 1, wherein the light guides are arranged in a matrix.
23. A light guiding structure, comprising:
a central region; and
The plurality of external light guide pieces are arranged on the periphery of the central area and surround the central area, each external light guide piece is provided with a light incident surface, a light emergent surface and an included angle defined by the light incident surface and the light emergent surface, and the included angle of the external light guide pieces is increased along with the increase of the distance between the external light guide pieces and the central area.
24. The light guide structure of claim 23, wherein the light incident surface is a slant surface and the light exiting surface is a plane surface.
25. The light guiding structure of claim 23, wherein the outer light guiding member further has a side surface opposite to the included angle, the light incident surface is curved, the light emergent surface is planar, and the side surface is curved.
26. The light guide structure of claim 25, wherein a curvature of the side surface is different from a curvature of the light entrance surface.
27. The light guide structure of claim 26, wherein a curvature of the side surface is greater than a curvature of the light entrance surface.
28. The light guide structure of claim 23, further comprising at least one central light guide disposed in the central region, the outer light guide having a cross-sectional shape that is different from the cross-sectional shape of the central light guide.
29. The light guide structure of claim 23, wherein the outer light guide is an asymmetric structure.
30. A light guiding structure, comprising:
a central region; and
The outer light guide members are arranged on the periphery of the central area and surround the central area, each outer light guide member is provided with a light incident surface, a light emergent surface, an included angle defined by the light incident surface and the light emergent surface and a side surface opposite to the included angle, and the height of the side surface of each outer light guide member increases along with the increase of the distance between the outer light guide member and the central area.
31. The light guide structure of claim 30, wherein the light incident surface is a slant surface and the light exiting surface is a plane surface.
32. The light guide structure of claim 30, wherein the light entrance surface is curved, the light exit surface is planar, and the side surface is curved.
33. The light guide structure of claim 32, wherein a curvature of the side surface is different from a curvature of the light entrance surface.
34. The light guide structure of claim 33, wherein a curvature of the side surface is greater than a curvature of the light entrance surface.
35. The light guide structure of claim 30, further comprising at least one central light guide disposed in the central region, the outer light guide having a cross-sectional shape that is different from the cross-sectional shape of the central light guide.
36. The light guide structure of claim 30, wherein the outer light guide is an asymmetric structure.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210980718.6A CN117631124A (en) | 2022-08-16 | 2022-08-16 | Display and light guide structure thereof |
| PCT/CN2023/084276 WO2024036973A1 (en) | 2022-08-16 | 2023-03-28 | Display and light guide structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210980718.6A CN117631124A (en) | 2022-08-16 | 2022-08-16 | Display and light guide structure thereof |
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| CN117631124A true CN117631124A (en) | 2024-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210980718.6A Pending CN117631124A (en) | 2022-08-16 | 2022-08-16 | Display and light guide structure thereof |
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| CN (1) | CN117631124A (en) |
| WO (1) | WO2024036973A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955196B (en) * | 2012-11-02 | 2014-08-27 | 京东方科技集团股份有限公司 | Light guide plate, backlight module and display device |
| WO2018088342A1 (en) * | 2016-11-09 | 2018-05-17 | シャープ株式会社 | Display apparatus and head-mounted display |
| CN111179769B (en) * | 2020-01-02 | 2023-04-18 | 京东方科技集团股份有限公司 | Display module |
| JP7421386B2 (en) * | 2020-03-19 | 2024-01-24 | シャープ株式会社 | Display device and head mounted display |
| CN114815234A (en) * | 2021-01-18 | 2022-07-29 | 京东方科技集团股份有限公司 | Display device, reality augmentation apparatus, and display method |
| CN114089464B (en) * | 2022-01-20 | 2022-09-06 | 扬昕科技(苏州)有限公司 | Light guide plate with gradual change microstructure and light source module thereof |
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2022
- 2022-08-16 CN CN202210980718.6A patent/CN117631124A/en active Pending
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