display

Abstract

The present application provides a display, comprising a light guide plate, a first optical adhesive, a light source element and a display panel. The light guide plate comprises a light guide substrate and a reinforcing layer. The light guide substrate has a light-in surface, a first surface and a second surface, the first surface and the second surface are opposite, and the light-in surface extends between the first surface and the second surface. The reinforcing layer is arranged on the light guide substrate. The first optical adhesive is arranged on the light guide substrate. At least a part of the reinforcing layer is sandwiched between the first surface of the light guide substrate and the first optical adhesive. The light source element is arranged beside the light-in surface. The display panel faces the second surface of the light guide substrate. The refractive index of the light guide substrate is n1. The refractive index of at least a part of the reinforcing layer is n2. The refractive index of the first optical adhesive is n3. The difference between the refractive index of the light guide substrate and the refractive index of at least a part of the reinforcing layer is Δn1. Δn1=n1-n2. The difference between the refractive index of the first optical adhesive and the refractive index of at least a part of the reinforcing layer is Δn2. Δn2=n3-n2, Δn1≥0, Δn2≥0, and Δn1≥Δn2.

Description

Technical Field

[0001] This invention relates to a display. Background Technology

[0002] Displays are widely used in various devices and fields. Therefore, display design faces various challenges and requires further improvement depending on the application. Take the light source in a display as an example: to achieve uniform light emission, a light guide plate must be included to guide the light distribution. In some applications, if the product requires flexibility or is used in non-planar environments, the light guide plate must further overcome the problem of damage due to bending. Therefore, the improvement of display components is an ongoing process. Summary of the Invention

[0003] This invention relates to a display with excellent optical performance.

[0004] According to an embodiment of the present invention, a display includes a light guide plate, a first optical adhesive, a light source element, and a display panel. The light guide plate includes a light guide substrate and a reinforcing layer. The light guide substrate has a light incident surface, a first surface, and a second surface. The first surface and the second surface are opposite to each other, and the light incident surface extends between the first surface and the second surface. The reinforcing layer is disposed on the light guide substrate. The first optical adhesive is disposed on the light guide substrate. At least a portion of the reinforcing layer is sandwiched between the first surface of the light guide substrate and the first optical adhesive. The light source element is disposed beside the light incident surface and emits light toward the light incident surface. The display panel faces the second surface of the light guide substrate. The refractive index of the light guide substrate is n1. The refractive index of at least a portion of the reinforcing layer is n2. The refractive index of the first optical adhesive is n3. The difference between the refractive index of the light guide substrate and the refractive index of at least a portion of the reinforcing layer is Δn1. Δn1 = n1 - n2. The difference between the refractive index of the first optical adhesive and the refractive index of at least a portion of the reinforcing layer is Δn2. Δn2=n3-n2, Δn1≥0, Δn2≥0, and Δn1≥Δn2.

[0005] Based on the above, the display of this embodiment uses a light guide plate with a reinforcement layer. The light guide plate includes a multi-layer structure. By appropriately designing the refractive index difference between the multi-layer structures, the optical performance of the display can be optimized. Attached Figure Description

[0006] Figure 1A This is an exploded view of a light source device according to an embodiment of the present invention;

[0007] Figure 1B for Figure 1A A side view of the light source device;

[0008] Figure 1C and Figure 1D illustrative representation Figure 1A The light guide plate 110 is in a bent state;

[0009] Figure 2 This is a side view schematic diagram of a light source device according to an embodiment of the present invention;

[0010] Figure 3A This is a side view schematic diagram of a light source device according to an embodiment of the present invention;

[0011] Figure 3B for Figure 3A A cross-sectional schematic diagram of the light source device along line II;

[0012] Figure 4 This is a side view schematic diagram of a light source device according to an embodiment of the present invention;

[0013] Figure 5 This is a side view schematic diagram of a light source device according to an embodiment of the present invention;

[0014] Figure 6 This is a side view of a display according to an embodiment of the present invention;

[0015] Figure 7 This is a side view of a display according to an embodiment of the present invention;

[0016] Figure 8 This is a side view of a display according to an embodiment of the present invention.

[0017] Explanation of reference numerals in the attached figures

[0018] 10: Display panel

[0019] 100, 100', 200, 200', 300: Light source device;

[0020] 110, 110', 210, 210', 310: Light guide plate;

[0021] 110a, 210a: First optical surfaces;

[0022] 110b, 210b: Second optical surfaces;

[0023] 110c, 210c: Optical side;

[0024] 110d: Internal interface; 112, 112': Light guide substrate;

[0025] 114, 114', 214, 214', 314: Reinforcement layers;

[0026] 130: Light source element;

[0027] 20: Touch panel;

[0028] 210d: First internal interface;

[0029] 210e: Second internal interface;

[0030] 214A: First sublayer;

[0031] 214B: Second sublayer;

[0032] 30: Cover plate;

[0033] 314C: Third sublayer;

[0034] 120: First optical adhesive;

[0035] 40: Second optical adhesive;

[0036] 50: Third optical adhesive;

[0037] DP1, DP2, DP3: Displays;

[0038] II: Line;

[0039] L1, L2: Light rays;

[0040] PS: Planar segment;

[0041] R1, R2: Sections;

[0042] S1, S1': First surface;

[0043] S2: Second surface;

[0044] S3: light incident surface;

[0045] SS: Inclined section;

[0046] T112, T114, T120: Thickness. Detailed Implementation

[0047] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element references are used in the drawings and description to denote the same or similar parts.

[0048] Figure 1A This is an exploded view of a light source device according to an embodiment of the present invention. Figure 1B for Figure 1A A side view of the light source device. Please also refer to... Figure 1A and Figure 1BThe light source device 100 includes a light guide plate 110, a first optical adhesive 120, and a light source element 130. The light guide plate 110 includes a light guide substrate 112 and a reinforcing layer 114. The reinforcing layer 114 is disposed on the light guide substrate 112. The first optical adhesive 120 is disposed on the light guide plate 110 and is used to attach other components (not shown). The light guide substrate 112 of the light guide plate 110 has a first surface S1, a second surface S2, and a light incident surface S3, wherein the first surface S1 and the second surface S2 are opposite to each other, and the light incident surface S3 extends between the first surface S1 and the second surface S2. In this embodiment, at least a portion of the reinforcing layer 114 is sandwiched between the first surface S1 and the first optical adhesive 120 of the light guide substrate 112. Furthermore, the light source element 130 is disposed beside the light incident surface S3 and emits light toward the light incident surface S3.

[0049] In some embodiments, the first optical adhesive 120 (optical clear adhesive, OCA; or optical clear resin, OCR) is a solid sheet adhesive material with good light transmittance, possessing properties similar to double-sided tape for attaching components above and below it. In some embodiments, the thickness T120 of the first optical adhesive 120 is approximately 25 micrometers to 250 micrometers. When both the first optical adhesive 120 and the light guide substrate 112 are solid materials with a certain thickness, the adhesion between them is not very strong, and they are easily peeled off. In this embodiment, a reinforcing layer 114 is provided between the first optical adhesive 120 and the light guide substrate 112, which helps to strengthen the adhesion between components. Therefore, the light guide plate 110 and the first optical adhesive 120 are not easily peeled off, thus helping to maintain the lifespan of the light source device 100.

[0050] In some embodiments, the light source element 130 includes a light-emitting diode. For example, the light source device 100 may include a plurality of light source elements 130, and the plurality of light source elements 130 may be spaced apart next to the light incident surface S3 of the light guide substrate 112. The light source elements 130 may be oriented with their emitting surfaces facing the light incident surface S3, thereby emitting light toward the light incident surface S3. The light guide plate 110 may guide the point-distributed light sources provided by the plurality of light source elements 130 into a surface light source for use in the final product (e.g., for use as a light source for a display).

[0051] The light guide substrate 112 is, for example, a flat plate. The first surface S1 and the second surface S2 refer to two surfaces parallel to the plane of the plate and substantially parallel in their normal directions, while the light-incident surface S3 may be a portion of a side surface surrounding the periphery of the flat plate. In this embodiment, taking a rectangular flat plate as an example, the light-incident surface S3 may be one of the four side surfaces. In some embodiments, the light-incident surface S3 may be two or more of the four side surfaces. That is, in some embodiments, the light source element 130 may be disposed alongside multiple side surfaces of the light guide substrate 112. Thus, the side surface corresponding to the light source element 130, or receiving light emitted by the light source element 130, can serve as the light-incident surface S3. Therefore, Figure 1A and Figure 1B The state of one of the side surfaces, which is the incident light surface S3, is for illustrative purposes only.

[0052] The material of the light guide substrate 112 may include polymethyl methacrylate (PMMA) or polycarbonate (PC), but is not limited thereto. The thickness T112 of the light guide substrate 112 is approximately several millimeters to tens of millimeters, for example, 2 millimeters to 15 millimeters, but is not limited thereto. In one embodiment, the reinforcing layer 114 may be a coating-type reinforcing layer, for example, formed on the light guide substrate 112 by coating. The thickness T114 of the reinforcing layer 114 may be significantly smaller than the thickness T112 of the light guide substrate 112, and the thickness T114 of the reinforcing layer 114 is also smaller than the thickness T120 of the first optical adhesive 120. For example, the thickness T114 of the reinforcing layer 114 is, for example, from 1 micrometer to 25 micrometers. Therefore, the reinforcing layer 114 is a thin coating formed on the light guide substrate 112, the thickness of which is not noticeable in the overall light source device 100. In addition, in some embodiments, the reinforcing layer 114 may have a structure through control and adjustment of the coating process. For example, the coating rate of the reinforcement layer 114 can be controlled to form a thicker thickness in some areas and a thinner thickness in others, thereby defining a microstructure in the final reinforcement layer 114.

[0053] Both the light guide substrate 112 and the reinforcing layer 114 have good light transmittance, allowing most visible light to pass through. Therefore, the light guide plate 110 can transmit the light emitted by the light source element 130 without causing significant light loss. Furthermore, the refractive index of the light guide substrate 112 is greater than that of the reinforcing layer 114. In this embodiment, the refractive index of the light guide substrate 112 can be 1.58–1.6 (made of PC) or 1.48–1.5 (made of PMMA), while the refractive index of the reinforcing layer 114 can be from 1.3 to 1.48, but is not limited thereto. Light emitted by the light source element 130 enters the light guide substrate 112 through the light incident surface S3 and travels within the light guide substrate 112. Because the refractive index of the light guide substrate 112 is greater than that of the reinforcing layer 114, oblique light rays may be totally internally reflected at the interface between the first surface S1 of the light guide substrate 112 and the reinforcing layer 114 and travel towards the second surface S2, causing the light to illuminate the element facing the second surface S2 (e.g., a display panel). Thus, the light source device 100 can be applied to a display to provide the light source required by the display, serving as a light source module.

[0054] Furthermore, the refractive index of the first optical adhesive 120 can be greater than that of the reinforcing layer 114. Therefore, light passing through the reinforcing layer 114 can pass through the first optical adhesive 120 without being reflected back to the light guide plate 110. This helps improve light utilization. In some embodiments, since the reinforcing layer 114 exists between the light guide substrate 112 and the first optical adhesive 120, the first optical adhesive 120 does not need to be limited to a material with a lower refractive index, which helps increase the flexibility in selecting the material of the first optical adhesive 120. For example, the refractive index of the first optical adhesive 120 can be greater than 1.45.

[0055] In some embodiments, the reinforcing layer 114 may be made of a photocrosslinked resin. In some embodiments, the reinforcing layer 114 may be made of a functional polymer, wherein the functional polymer may include acrylate polymers; block polymers; oligomers, polymers, or hyperbranched polymers containing fluoroacrylate; silicone-modified oligomers, polymers, or hyperbranched polymers; acrylic epoxy resins; acrylic polyurethanes; aliphatic acrylic polyurethanes; aromatic acrylic polyurethanes; or combinations thereof. In some embodiments, the functional polymer of the reinforcing layer 114 may comprise 0 wt% to 60 wt%.

[0056] In some embodiments, the reinforcing layer 114 may be made of functional monomers, which may include monofunctional or polyfunctional monomers. In some embodiments, the functional monomers may include monofunctional or polyfunctional acrylate monomers; fluoroacrylate monomers; silicon-modified acrylate monomers; or combinations thereof. In some embodiments, the proportion of functional monomers in the reinforcing layer 114 may range from 10 wt% to 99 wt%.

[0057] In some embodiments, the material of the reinforcing layer 114 may include a photoinitiator, which may be a single-component or multi-component photoinitiator. For example, the photoinitiator is a reactant that generates free radicals upon illumination and undergoes reactions via these free radicals. The photoinitiator may be a hydroxyketone type photoinitiator, such as: 184 or acylphosphine oxide type photoinitiators, such as TPO. In some embodiments, the proportion of photoinitiator in the reinforcing layer 114 can be from 0.01 wt% to 5 wt%.

[0058] In some embodiments, the reinforcing layer 114 includes a filler, wherein the filler comprises organic particles, inorganic particles, or a combination thereof. Organic particles, for example, include silicon polymers. Inorganic particles, for example, include nanomaterials such as ZnO, TiO2, SiO2, MgF2, etc. In some embodiments, the material of the reinforcing layer 114 may include additives such as dyes or pigments, optical brighteners, microcapsules, light stabilizers, thickeners, and leveling agents. The additives and / or fillers in the reinforcing layer 114 may comprise approximately 0.01 wt% to 15 wt%.

[0059] In some embodiments, the material of the reinforcing layer 114 may include a solvent or a solvent-free material. The solvent used to form the reinforcing layer 114 may be isopropanol (IPA), alcohol (EtOH), butanone (MEK), acetone, toluene, ethyl acetate (EA), tetrahydrofuran (THF), dimethylacetamide (DMAC), etc. The solvent in the reinforcing layer 114 may account for approximately 0 wt% to 50 wt%.

[0060] The material of the reinforcing layer 114 can be adjusted based on different needs. In some embodiments, the material of the reinforcing layer 114 includes monomers, oligomers, or polymers of silicone-modified acrylate; or when it contains fillers such as silicone polymers, SiO2 particles, or nano-metal particles, the reinforcing layer 114 may have waterproof properties. In some embodiments, the material of the reinforcing layer 114 includes monomers, oligomers, or polymers of acrylate; acrylic epoxy resin or acrylic polyurethane (aliphatic and aromatic); or when it contains fillers such as silicone polymers, SiO2 particles, or nano-metal particles, the reinforcing layer 114 may have good chemical resistance. In some embodiments, the material of the reinforcing layer 114 includes monomers, oligomers, or polymers of acrylate; acrylic epoxy resin; acrylic polyurethane; grafted polymers; or when it contains fillers such as silicone polymers, SiO2 particles, or nano-metal particles, the reinforcing layer 114 has good scratch resistance. In some embodiments, when nano-metal fillers or ultraviolet (UV) resistant additives are added to the material of the reinforcing layer 114, the reinforcing layer 114 has UV protection properties. In some embodiments, when the material of the reinforcing layer 114 incorporates block copolymers or microcapsules, the reinforcing layer 114 possesses self-healing properties. Self-healing refers to the fact that the reinforcing layer 114, when subjected to external forces (such as bending, flexing, etc.), exhibits self-healing properties. Figure 1C and Figure 1DWhen cracks occur due to the light guide plate 110's condition (e.g., its state), these additives can help fill the cracks and achieve self-repair, which helps maintain the lifespan of the light guide plate 110. Therefore, the light guide plate 110 has flexible tolerance and can be used in flexible products or curved (non-planar) products. However, the above description of individual characteristics and materials is only illustrative and the invention is not limited thereto.

[0061] Figure 2 This is a side view schematic diagram of a light source device according to an embodiment of the present invention. Figure 2 In the light source device 200, there are light guide plates 210, first optical adhesive 120 and light source elements 130, wherein the light guide plate 210 includes a light guide substrate 112 and a reinforcing layer 214. Figure 2 The first optical adhesive 120, the light source element 130, and the light guide substrate 112 are substantially the same as those in the original text. Figure 1A and Figure 1B The first optical adhesive 120, the light source element 130, and the light guide substrate 112 are included in the two embodiments, therefore the descriptions of these elements in the two embodiments can be referenced and applied to each other. Specifically, this embodiment differs from... Figure 1A and Figure 1B The key difference in this embodiment lies in that, in addition to being disposed on the first surface S1 of the first optical adhesive 120 and the light guide substrate 112, the reinforcing layer 214 also covers the second surface S2 of the light guide substrate 112. For ease of explanation, the portions of the reinforcing layer 214 covering different surfaces are divided into a first sub-layer 214A and a second sub-layer 214B. The first sub-layer 214A covers the first surface S1 of the light guide substrate 112, while the second sub-layer 214B covers the second surface S2 of the light guide substrate 112. The first sub-layer 214A is substantially the same as... Figure 1A and Figure 1B The reinforcement layer 114 in the middle. The material and properties of the first sub-layer 214A and the second sub-layer 214B can be the same as those of the reinforcement layer 114 in the middle. Figure 1A and Figure 1B The reinforcing layer 114 in the middle. For example, the refractive index of the first sublayer 214A and the second sublayer 214B can be from 1.3 to 1.48, the thickness of the first sublayer 214A and the second sublayer 214B can be from 1 micrometer to 25 micrometers, and the material of the first sublayer 214A and the second sublayer 214B can be selected from the material of the aforementioned reinforcing layer 114.

[0062] Figure 3A This is a side view schematic diagram of a light source device according to an embodiment of the present invention. Figure 3B for Figure 3A A cross-sectional view of the light source device along line II. In Figure 3A and Figure 3BIn the light source device 300, there are light guide plates 310, first optical adhesive 120, and light source elements 130. The light guide plate 310 includes a light guide substrate 112 and a reinforcing layer 314. The light source device 300 is generally similar to the light source device 200. Therefore, the same element symbols in the two embodiments can represent the same elements, and the descriptions of the same elements in the two embodiments can be referred to each other. Specifically, the light source device 300 differs from the light source device 200 mainly in that the coating-type reinforcing layer 314 also covers the light-incident surface S3, so that the coating-type reinforcing layer 314 is sandwiched between the light-incident surface S3 and the light source element 130. In other words, the coating-type reinforcing layer 314 includes a first sub-layer 214A covering the first surface S1, a second sub-layer 214B covering the second surface S2, and a third sub-layer 314C covering the light-incident surface S3. The descriptions of the first sub-layer 214A and the second sub-layer 214B can be referred to Figure 2 The relevant description is as follows. The third sublayer 314C can completely cover the light surface S3. In some embodiments, the third sublayer 314C can be continuously connected between the first sublayer 214A and the second sublayer 214B, but is not limited thereto. In some embodiments, adjacent sublayers of the first sublayer 214A, the second sublayer 214B and the third sublayer 314C can be disconnected from each other and are not continuous.

[0063] The third sublayer 314C of the coated reinforcement layer 314 serves as an interlayer between the light source element 130 and the light incident surface S3. Light emitted from the light source element 130 can be scattered and refracted by the third sublayer 314C before reaching the light incident surface S3, which helps to improve the pre-homogenization of light before it enters the light guide substrate 112. For example, such as... Figure 3B As shown, the light source device 300 includes a plurality of light source elements 130 spaced apart. Therefore, the light source elements 130 do not provide a continuous light source distributed along the light-incident surface S3. Specifically, the light-incident surface S3 of the light guide substrate 112 includes a segment R1 overlapping with the light source elements 130 and a segment R2 not overlapping with the light source elements 130. Due to the spaced arrangement of the light source elements 130, the light emitted by the light source elements 130 is mainly distributed in segment R1, resulting in segment R2 receiving relatively less light, which may cause a significant brightness difference between segment R1 and segment R2. However, in this embodiment, the third sub-layer 314C can provide refraction, scattering, and other effects to adjust the distribution of light emitted by the light source elements 130, so that the light can be pre-uniformed in the third sub-layer 314C before entering the light guide substrate 112 from the light-incident surface S3. Thus, the brightness difference between segment R1 and segment R2 can be mitigated, resulting in a more uniform light distribution. Because the refractive index of the third sublayer 314C is (same as...) Figure 1A and Figure 1BThe refractive index of the reinforcing layer 114 (described as follows) is less than that of the light guide substrate 112. Light will not be totally reflected at the interface between the third sublayer 314C and the incident surface S3, and most of it can enter the light guide substrate 112 without causing light loss. Therefore, the light source device 300 can provide a uniform light emission effect and ideal light utilization.

[0064] Figure 4 This is a side view schematic diagram of a light source device according to an embodiment of the present invention. Figure 4 In the middle, the light source device 100' is roughly similar. Figure 1A and Figure 1B The light source device 100 includes a light guide plate 110, a first optical adhesive 120, and a light source element 130. The first optical adhesive 120 and the light source element 130 are described in detail below. Figure 1A and Figure 1B The relevant descriptions will not be repeated here. In this embodiment, the light guide plate 110' is different from... Figure 1A and Figure 1B The main difference between the light guide plate 110 and the light guide plate 110' is that the light guide plate 110' includes a light guide substrate 112' and a reinforcing layer 114', and the shape of the light guide substrate 112' is different from that of the light guide substrate 112. Specifically, the light guide substrate 112' has a first surface S1', a second surface S2, and a light incident surface S3. The reinforcing layer 114' is disposed on the first surface S1', and the light source element 130 faces the light incident surface S3. The first surface S1' of the light guide substrate 112' has a beveled section SS and a planar section PS, and the beveled section SS is located between the light incident surface S3 and the planar section PS.

[0065] In this embodiment, the thickness of the light guide substrate 112' remains approximately constant in the planar section PS, and gradually increases towards the light incident surface S3 in the inclined section SS. Therefore, the light guide substrate 112' has a wedge-shaped structure near the light incident surface S3, and a thinner thickness away from the light incident surface S3. In some embodiments, the thickness variation of the light guide substrate 112' can range from 5 micrometers to 250 micrometers. The reinforcing layer 114' is compliantly disposed on the first surface S1' and also has a varying thickness to compensate for the thickness variation of the light guide substrate 112', resulting in a light guide plate 110' having a structure of approximately uniform thickness. Thus, the first optical adhesive 120 can be disposed on the flat surface formed by the reinforcing layer 114', which helps ensure the adhesion stability of the first optical adhesive 120.

[0066] Figure 5 This is a side view schematic diagram of a light source device according to an embodiment of the present invention. Figure 4 In the middle, the light source device 200' is roughly similar. Figure 2The light source device 200 includes a light guide plate 210, a first optical adhesive 120, and a light source element 130. The first optical adhesive 120 and the light source element 130 are described in detail below. Figure 1A and Figure 1B The relevant descriptions will not be repeated here. In this embodiment, the light guide plate 210' is different from... Figure 2 The main difference in the light guide plate 210 is that it includes a light guide substrate 112' and a reinforcing layer 214', and the shape of the light guide substrate 112' is different from that of the light guide substrate 112. Specifically, the light guide substrate 112' has a first surface S1', a second surface S2, and a light incident surface S3. The reinforcing layer 214' includes a first sub-layer 214A' disposed on the first surface S1' and a second sub-layer 214B disposed on the second surface S2, and the light source element 130 is disposed next to the light incident surface S3 to emit light toward the light incident surface S3.

[0067] In this embodiment, the first surface S1' of the light guide substrate 112' has a beveled section SS and a planar section PS, with the beveled section SS located between the light incident surface S3 and the planar section PS. The thickness of the light guide substrate 112' remains approximately constant in the planar section PS, while gradually increasing towards the light incident surface S3 in the beveled section SS. Therefore, the light guide substrate 112' has a wedge-shaped structure near the light incident surface S3. The first sublayer 214A' of the reinforcing layer 214' disposed on the first surface S1' also has a variable thickness to compensate for the thickness variation of the light guide substrate 112', resulting in the light guide plate 210' having a structure of approximately uniform thickness. Thus, the first optical adhesive 120 can be disposed on the flat surface formed by the first sublayer 214A', which helps to ensure the adhesion stability of the first optical adhesive 120. In other embodiments, the light guide substrate 112' with a wedge-shaped structure and the first sublayer 214A' with a variable thickness can be applied to Figure 3A The light source device 300 replaces Figure 3A The light guide substrate 112 and the first sublayer 214A in the middle help to thin the overall product.

[0068] Figure 6 This is a side view schematic diagram of a display according to an embodiment of the present invention. Figure 6In this embodiment, the display DP1 mainly includes a light guide plate 110, a first optical adhesive 120, a light source element 130, a display panel 10, a touch panel 20, a cover plate 30, and other second optical adhesives 40 and third optical adhesives 50. The light guide plate 110, the first optical adhesive 120, and the light source element 130 can constitute the aforementioned light source device 100. Therefore, the specific features of the light source device 100 can be referred to the description of the aforementioned embodiments. The display panel 10 can be attached to the light guide plate 110 via the second optical adhesive 40, and the touch panel 20 can be attached to the light guide plate 110 via the first optical adhesive 120. The display panel 10 and the touch panel 20 are located on opposite sides of the light guide plate 110. The cover plate 30 is attached to the touch panel 20 via the third optical adhesive 50. The cover plate 30 is, for example, a light-transmitting plate-shaped element and can have suitable mechanical strength to protect the display DP1.

[0069] In this embodiment, the display panel 10 is, for example, a reflective display panel. After the light source provided by the light source device 100 illuminates the display panel 10, it is reflected by the display panel 10 and passes through the light guide plate 110, the touch panel 20, and the cover plate 30 before being emitted from the cover plate 30 to display the image. Therefore, the light source device 100 is a front light source module, positioned between the user who wants to view the display image and the display panel 10 (or, in other words, located in front of the display panel 10). Furthermore, the light guide plate 110 allows the light emitted by the light source element 130 to be uniformly provided to the display panel 10 and allows the light reflected by the display panel 10 to pass through, thereby achieving the display function.

[0070] The light guide plate 110 includes a light guide substrate 112 and a reinforcing layer 114. The light guide substrate 112 has a first surface S1, a second surface S2, and a light incident surface S3, with the first surface S1 and the second surface S2 located on opposite sides of the light incident surface S3. The reinforcing layer 114 covers the first surface S1 and is located between the light guide substrate 112 and the first optical adhesive 120. The thickness of the reinforcing layer 114 ranges from 1 micrometer to 25 micrometers, and the refractive index of the light guide substrate 112 is greater than the refractive index of the reinforcing layer 114. Additionally, in some embodiments, the light guide substrate 112 and the reinforcing layer 114 may be made of... Figure 4 It is implemented by using a light guide substrate 112' and a reinforcing layer 114'.

[0071] A light source element 130 is disposed next to the light-incident surface S3 and emits light toward the light-incident surface S3. The display panel 10 faces the second surface S2 of the light-guide substrate 112, and the display panel 10 is attached to the second surface S2 of the light-guide substrate 112, for example, by means of a second optical adhesive 40. Additionally, the touch panel 20 can be attached to a coating reinforcement layer 114 on the first surface S1 of the light-guide substrate 112 by means of a first optical adhesive 120. The light emitted by the light source element 130 enters the light-guide substrate 112 from the light-incident surface S3 and travels within the light-guide substrate 112, distributing as a surface light source. For example, light L1 obliquely incident on the first surface S1 can be reflected and redirected toward the second surface S2 based on the refractive index relationship between the reinforcement layer 114 and the light-guide substrate 112 to illuminate the display panel 10. Therefore, the reinforcement layer 114 helps to increase the amount of light emitted by the light source element 130 that illuminates the display panel 10, thus improving the light utilization rate of the light source device 100.

[0072] Furthermore, the light L2 reflected by the display panel 10 can sequentially pass through the light guide plate 110, the first optical adhesive 120, the touch panel 20, the third optical adhesive 50, and the cover plate 30 to display the image. In this embodiment, the refractive index of the first optical adhesive 120 can be greater than the refractive index of the reinforcing layer 114, so the light L2 is less likely to be reflected at the interface between the first optical adhesive 120 and the reinforcing layer 114. This allows the light L2 carrying display information to be emitted efficiently, thus helping to improve display contrast. In addition, the material of the first optical adhesive 120 does not need to be limited to a material with a low refractive index, which helps to increase the flexibility of material selection. In some embodiments, the refractive index of the first optical adhesive 120 can be greater than 1.45.

[0073] In this embodiment, the reinforcing layer 114 may be made of materials such as... Figure 1A and Figure 1B The material described in the embodiments. The reinforcing layer 114 can achieve various desired properties through the selection and formulation of different components, such as water resistance, UV protection, chemical resistance, scratch resistance, and self-healing. Therefore, as... Figure 1C and Figure 1D As shown, the light guide plate 110 can be bent and applied to curved products or flexible products.

[0074] Please refer to Figure 6The refractive index of the light guide substrate 112 is n1. At least a portion of the refractive index of the reinforcing layer 114 sandwiched between the first surface S1 and the first optical adhesive 120 of the light guide substrate 112 is n2. The refractive index of the first optical adhesive 120 is n3. The refractive index of the second optical adhesive 40 is n4. The difference between the refractive index n1 of the light guide substrate 112 and the refractive index n2 of at least a portion of the reinforcing layer 114 is Δn1, where Δn1 = n1 - n2. The difference between the refractive index n3 of the first optical adhesive 120 and the refractive index n2 of at least a portion of the reinforcing layer 114 sandwiched between the first surface S1 and the first optical adhesive 120 of the light guide substrate 112 is Δn2, where Δn2 = n3 - n2. The difference between the refractive index n1 of the light guide substrate 112 and the refractive index n4 of the second optical adhesive 40 is Δn3, where Δn3 = n1 - n4.

[0075] It is worth noting that Δn1≥0, Δn2≥0, and Δn1≥Δn2, thereby enabling the display DP1 to achieve better optical performance. For example, in some embodiments, Δn1>0, Δn2>0, and Δn1>Δn2, but the present invention is not limited thereto. In some embodiments, Δn1≥0, Δn2≥0, Δn3≥0, and Δn1≥Δn3≥Δn2, thereby optimizing the optical performance of the display DP1. For example, in some embodiments, Δn1>0, Δn2>0, Δn3>0, and Δn1>Δn3>Δn2, but the present invention is not limited thereto.

[0076] exist Figure 6 In this light guide plate 110, there are light guide substrate 112 and reinforcing layer 114. The light guide plate 110 has a first optical surface 110a, a second optical surface 110b, an optical side surface 110c, and an internal interface 110d. The first optical surface 110a and the second optical surface 110b are opposite to each other. The optical side surface 110c extends between the first optical surface 110a and the second optical surface 110b. At least a portion of the optical side surface 110c can serve as the light incident surface of the light guide plate 110. The internal interface 110d is the interface between the light guide substrate 112 and at least a portion of the reinforcing layer 114 sandwiched between the first surface S1 and the first optical adhesive 120 of the light guide substrate 112. At least one of the first optical surface 110a, the second optical surface 110b, the optical side surface 110c, and the internal interface 110d can have multiple optical microstructures. In some embodiments, the size of an optical microstructure can be less than 100 μm. For example, in some embodiments, the optical microstructure may be a dot structure, a line structure, or a structure of other shapes. In some embodiments, the length of the line structure may be less than the width of the display area of ​​the display panel 10.

[0077] Table 1 lists the components and refractive indices of a comparative example display. Table 1 further lists... Figure 6The components and refractive index of the display DP1 in this embodiment are described. As can be seen from the data in Table 1, compared to the display of the comparative example, Figure 6 The brightness, contrast (when the current light source is on), and color performance (when the current light source is on) of the display DP1 in the embodiment are all significantly improved.

[0078] Comparative display Display DP1 in the embodiment Cover plate 30 and touch panel 20 have have First Optical Adhesive 120 There are (n3 = 1.48) There are (n3 = 1.48) Reinforcement layer 114 none There is (n² = 1.38) Light guide substrate 112 There is (n1 = 1.58) There is (n1 = 1.58) Second optical adhesive 40 There are (n4 = 1.48) There are (n4 = 1.48) Display panel 10 have have Brightness (any unit) 81.7 114.7 Comparison (when the current light source is on) 13.8 16.2 Color performance (when the current light source is on) 9425 14704 Comparison (when the current light source is off) 11.9 11.9 Color representation (when the current light source is off) 3409 3553

[0079] [Table 1]

[0080] Figure 7 This is a side view schematic diagram of a display according to an embodiment of the present invention. Figure 7 In this embodiment, display DP2 mainly includes a light guide plate 210, a first optical adhesive 120, a light source element 130, a display panel 10, a touch panel 20, a cover plate 30, a second optical adhesive 40, and a third optical adhesive 50. Display DP2 is largely the same as display DP1; therefore, descriptions of the same components in both embodiments can be referenced interchangeably. Specifically, display DP2 differs from display DP1 in that display DP2 uses a light source device 200, composed of the light guide plate 210, the first optical adhesive 120, and the light source element 130, as the light source for the display panel 10. The light source device 200 is disposed between the display panel 10 and the touch panel 20. The specific structure and design of the light source device 200 can be found in [reference needed]. Figure 2 The relevant explanations will not be repeated here. Additionally, in some embodiments, the light guide plate 210 may employ... Figure 5 The light guide plate 210' in the light source device 200 is used for implementation. Specifically, the light guide plate 210 of the light source device 200 includes a light guide substrate 112 and a reinforcing layer 214, and the reinforcing layer 214 includes a first sub-layer 214A and a second sub-layer 214B covering different surfaces of the light guide substrate 112. The first sub-layer 214A covers the first surface S1 of the light guide substrate 112. The second sub-layer 214B covers the second surface S2 of the light guide substrate 112. Thus, the first optical adhesive 120 for attaching the touch panel 20 to the light guide plate 210 is disposed on the first sub-layer 214A, and the second optical adhesive 40 for attaching the display panel 10 to the light guide plate 210 is disposed on the second sub-layer 214B. The display panel 10 is attached to the second sub-layer 214B of the reinforcing layer 214 through the second optical adhesive 40. Thus, the reinforcing layer 214 is sandwiched between the first surface S1 of the light guide substrate 112 and the first optical adhesive 120, and also between the second surface S2 of the light guide substrate 112 and the display panel 10.

[0081] Please refer to Figure 7The refractive index of the light guide substrate 112 is n1. At least a portion of the reinforcing layer 214 sandwiched between the first surface S1 of the light guide substrate 112 and the first optical adhesive 120 is a first sublayer 214A. The refractive index of the first sublayer 214A of the reinforcing layer 214 is n2. The refractive index of the first optical adhesive 120 is n3. The refractive index of the second optical adhesive 40 is n4. The refractive index of the second sublayer 214B of the reinforcing layer 214 is n5. The difference between the refractive index n1 of the light guide substrate 112 and the refractive index n2 of the first sublayer 214A of the reinforcing layer 214 is Δn1, where Δn1 = n1 - n2. The difference between the refractive index n3 of the first optical adhesive 120 and the refractive index n2 of the first sublayer 214A of the reinforcing layer 214 is Δn2, where Δn2 = n3 - n2. The difference between the refractive index of the light guide substrate 112 and the refractive index n5 of the second sublayer 214B of the reinforcement layer 210 is Δn4, where Δn4 = n1 - n5. The difference between the refractive index of the second optical adhesive 40 and the refractive index of the second sublayer 214B of the reinforcement layer 214 is Δn5, where Δn5 = n4 - n5.

[0082] It is worth noting that Δn1≥0, Δn2≥0, and Δn1≥Δn2, thereby enabling the display DP2 to achieve better optical performance. In some embodiments, Δn1≥0, Δn2≥0, Δn4≥0, Δn5≥0, and Δn1≥Δn4≥Δn2≥Δn5, thereby optimizing the optical performance of the display DP2. For example, in some embodiments, Δn1>0, Δn2>0, Δn4>0, Δn5>0, and Δn1>Δn4>Δn2>Δn5, but the present invention is not limited thereto.

[0083] exist Figure 7In the light guide plate 210, there are light guide substrate 112, a first sub-layer 214A and a second sub-layer 214B of the reinforcing layer 214. The light guide plate 210 has a first optical surface 210a, a second optical surface 210b, an optical side surface 210c, a first internal interface 210d and a second internal interface 210e. The first optical surface 210a and the second optical surface 210b are opposite to each other. The optical side surface 210c extends between the first optical surface 210a and the second optical surface 210b. At least a portion of 0c can serve as the light-incident surface of the light guide plate 210. The first internal interface 210d is the interface between the light guide substrate 112 and the first sublayer 214A of the reinforcing layer 214, and the second internal interface 210e is the interface between the light guide substrate 112 and the second sublayer 214B of the reinforcing layer 214. At least one of the first optical surface 210a, the second optical surface 210b, the optical side surface 210c, the first internal interface 210d, and the second internal interface 210e can have multiple optical microstructures. In some embodiments, the size of an optical microstructure can be less than 100 μm. For example, in some embodiments, the optical microstructure can be a dot structure, a line structure, or a structure of other shapes. In some embodiments, the length of the line structure can be less than the width of the display area of ​​the display panel 10.

[0084] Table 2 lists the components and refractive index of a comparative example display. Table 2 further lists... Figure 7 The components and refractive index of the display DP2 in this embodiment are shown. As can be seen from the data in Table 2, compared to the display of the comparative example, Figure 7 The brightness, contrast (when the current light source is on), and color performance (when the current light source is on) of the DP2 display in the embodiment are all significantly improved.

[0085] Comparative display Display DP2 in the embodiment Cover plate 30 and touch panel 20 have have First Optical Adhesive 120 There is (n3 = 1.41) There is (n3 = 1.41) Reinforcement layer 214A none There is (n² = 1.38) Light guide substrate 112 There is (n1 = 1.55) There is (n1 = 1.55) Reinforcement layer 214B none There is (n5 = 1.38) Second optical adhesive 40 There are (n4 = 1.41) There are (n4 = 1.41) Display panel 10 have have Brightness (any unit) 81.7 110 Comparison (when the current light source is on) 10.8 12.3 Color performance (when the current light source is on) 46k 57k Comparison (when the current light source is off) 11.9 13.6 Color representation (when the current light source is off) 5227 6305

[0086] [Table 2]

[0087] Figure 8 This is a side view schematic diagram of a display according to an embodiment of the present invention. Figure 8In the embodiment, display DP3 mainly includes a light guide plate 310, a first optical adhesive 120, a light source element 130, a display panel 10, a touch panel 20, a cover plate 30, and other second optical adhesives 40 and third optical adhesives 50. Display DP3 is largely the same as display DP1, so the descriptions of the same components in the two embodiments can be referred to each other. Specifically, display DP3 differs from display DP1 in that display DP3 uses a light source device 300 composed of a light guide plate 310, a first optical adhesive 120, and a light source element 130 as the light source for display panel 10. Specifically, the light source device 300 includes a light guide plate 310, a first optical adhesive 120, and a light source element 130. The light guide plate 310 includes a light guide substrate 112 and a reinforcing layer 314. The reinforcing layer 314 includes a first sub-layer 214A covering the first surface S1, a second sub-layer 214B covering the second surface S2, and a third sub-layer 314C covering the light incident surface S3. The structure and specific design of the light source device 300 can be referred to Figure 3A and Figure 3B The relevant descriptions will not be repeated here. Additionally, in some embodiments, the light guide substrate 112 may be made of... Figure 5 The light guide substrate 112' is used for implementation.

[0088] In summary, the light source device and display of this embodiment of the invention feature a composite light guide plate design. The light guide plate of the embodiment includes a light guide substrate and a reinforcing layer. The material selection of the reinforcing layer can achieve different functions, such as waterproofing, UV protection, chemical resistance, scratch resistance, and self-healing. Therefore, the light guide plate of the embodiment is advantageous for application in various products. The reinforcing layer can serve as an intermediary layer between the light guide substrate and the first optical adhesive, stabilizing the bonding between components without increasing the overall product thickness. The reinforcing layer can also serve as an intermediary layer between the light guide substrate and the light source element, assisting in the uniform distribution of light emitted by the light source element within the light guide plate. This helps improve the luminous uniformity of the light-emitting device and enhances the display quality of the display.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display, characterized in that, include: Light guide plate, including: A light guide substrate has a light incident surface, a first surface, and a second surface, wherein the first surface and the second surface are opposite to each other, and the light incident surface extends between the first surface and the second surface; and A reinforcement layer is disposed on the light guide substrate; A first optical adhesive is disposed on the light guide substrate, and at least a portion of the reinforcing layer is sandwiched between the first surface of the light guide substrate and the first optical adhesive; A light source element is disposed beside the light-incident surface and emits light toward the light-incident surface; and The display panel faces the second surface of the light guide substrate; Wherein, the refractive index of the light guide substrate is n1, the refractive index of the at least part of the reinforcing layer is n2, the refractive index of the first optical adhesive is n3, the difference between the refractive index of the light guide substrate and the refractive index of the at least part of the reinforcing layer is Δn1, Δn1=n1-n2, the difference between the refractive index of the first optical adhesive and the refractive index of the at least part of the reinforcing layer is Δn2, Δn2=n3-n2, Δn1≥0, Δn2≥0, and Δn1≥Δn2.

2. The display according to claim 1, characterized in that, Δn1>0, and Δn2>0.

3. The display according to claim 1, characterized in that, Δn1>Δn2.

4. The display according to claim 1, characterized in that, Also includes: The second optical adhesive is used to attach the display panel to the second surface of the light guide substrate. Wherein, the refractive index of the second optical adhesive is n4, and the difference between the refractive index of the light guide substrate and the refractive index of the second optical adhesive is Δn3, Δn3=n1-n4, Δn3≥0, and Δn1≥Δn3≥Δn2.

5. The display according to claim 4, characterized in that, Δn1>0, Δn2>0, and Δn3>0.

6. The display according to claim 4, characterized in that, Δn1>Δn3>Δn2.

7. The display according to claim 4, characterized in that, The optical element includes the light guide substrate and the reinforcement layer. The optical element has a first optical surface, a second optical surface, an optical side surface, and an internal interface. The first optical surface and the second optical surface are opposite to each other. The optical side surface extends between the first optical surface and the second optical surface. The internal interface is the interface between the light guide substrate and the reinforcement layer. At least one of the first optical surface, the second optical surface, the optical side surface, and the internal interface has a plurality of optical microstructures.

8. The display according to claim 4, characterized in that, The reinforcement layer includes: A first sublayer covers the first surface of the light guide substrate, at least a portion of the reinforcing layer is the first sublayer, and the refractive index of the first sublayer is n-2; and The second sublayer covers the second surface of the light guide substrate, and the refractive index of the second sublayer is n_5; The difference between the refractive index of the light guide substrate and the refractive index of the second sublayer of the reinforcement layer is Δn4, where Δn4 = n1 - n5, Δn4 ≥ 0, and Δn1 ≥ Δn4 ≥ Δn2.

9. The display according to claim 8, characterized in that, Δn1>0, Δn2>0, and Δn4>0.

10. The display according to claim 8, characterized in that, Δn1>Δn4>Δn2.

11. The display according to claim 8, characterized in that, The display panel is attached to the second sub-layer of the reinforcement layer by the second optical adhesive. The difference between the refractive index of the second optical adhesive and the refractive index of the second sub-layer is Δn5, where Δn5 = n4 - n5, Δn5 ≥ 0, and Δn1 ≥ Δn4 ≥ Δn2 ≥ Δn5.

12. The display according to claim 11, characterized in that, Δn1>0, Δn2>0, Δn4>0, and Δn5>0.

13. The display according to claim 11, characterized in that, Δn1>Δn4>Δn2>Δn5.

14. The display according to claim 11, characterized in that, The optical element includes the light guide substrate, the first sublayer of the reinforcement layer, and the second sublayer of the reinforcement layer. The optical element has a first optical surface, a second optical surface, an optical side surface, a first internal interface, and a second internal interface. The first optical surface and the second optical surface are opposite to each other. The optical side surface extends between the first optical surface and the second optical surface. The first internal interface is the interface between the light guide substrate and the first sublayer. The second internal interface is the interface between the light guide substrate and the second sublayer. At least one of the first optical surface, the second optical surface, the optical side surface, the first internal interface, and the second internal interface has a plurality of optical microstructures.

15. A front optical module, characterized in that, include: Light guide plate, including: A light guide substrate has a light incident surface, a first surface, and a second surface, wherein the first surface and the second surface are opposite to each other, and the light incident surface extends between the first surface and the second surface; and A reinforcement layer is disposed on the light guide substrate; A first optical adhesive is disposed on the light guide substrate, and at least a portion of the reinforcing layer is sandwiched between the first surface of the light guide substrate and the first optical adhesive; Wherein, the refractive index of the light guide substrate is n1, the refractive index of the at least part of the reinforcing layer is n2, the refractive index of the first optical adhesive is n3, the difference between the refractive index of the light guide substrate and the refractive index of the at least part of the reinforcing layer is Δn1, Δn1=n1-n2, the difference between the refractive index of the first optical adhesive and the refractive index of the at least part of the reinforcing layer is Δn2, Δn2=n3-n2, Δn1≥0, Δn2≥0, and Δn1≥Δn2.

16. The front optical module according to claim 15, characterized in that, Also includes: A second optical adhesive is disposed on the second surface of the light guide substrate; Wherein, the refractive index of the second optical adhesive is n4, and the difference between the refractive index of the light guide substrate and the refractive index of the second optical adhesive is Δn3, Δn3=n1-n4, Δn3≥0, and Δn1≥Δn3≥Δn2.

17. The front optical module according to claim 15, characterized in that, The reinforcing layer is formed on the light guide substrate by coating, and the thickness of the reinforcing layer is less than the thickness of the light guide substrate.

18. A front optical module, characterized in that, include: Light guide plate, including: A light guide substrate has a light incident surface, a first surface, and a second surface, wherein the first surface and the second surface are opposite to each other, and the light incident surface extends between the first surface and the second surface; and A reinforcement layer is disposed on the light guide substrate; and A first optical adhesive is disposed on the light guide substrate, and at least a portion of the reinforcing layer is sandwiched between the first surface of the light guide substrate and the first optical adhesive; Wherein, the refractive index of the light guide substrate is n1, the refractive index of at least a portion of the reinforcing layer is n2, the refractive index of the first optical adhesive is n3, wherein Δn1>Δn3>Δn2, and the thickness of the reinforcing layer is less than the thickness of the light guide substrate, and the thickness of the reinforcing layer is less than the thickness of the first optical adhesive.

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