Light guide component, display device and method for manufacturing display device

Abstract

At least one embodiment of this disclosure provides a light guide member, a display device including the light guide member, and a method for manufacturing the display device. The light guide member includes: an upper light guide portion including a light emitting surface and a refractive surface; and a lower light guide portion including a light incident surface and a reflective surface. The light emitting surface and the light incident surface are arranged substantially parallel to each other, and the refractive surface and the reflective surface are disposed at the edge of the light guide member. The light guide member is configured such that: a first deflected ray entering the light incident surface is projected onto one of the refractive surface and the light emitting surface, and is refracted by the refractive surface and exited from the light guide member; a second deflected ray entering the light incident surface is projected onto the reflective surface, reflected by the reflective surface to one of the refractive surface and the light emitting surface, and is refracted by the refractive surface and exited from the light guide member.

Description

Technical Field

[0001] Embodiments of this disclosure relate to a light guide member, a display device including the light guide member, and a method for manufacturing the display device. Background Technology

[0002] With the rapid development of flat panel display technology, its size and application scenarios are constantly expanding, giving rise to large-size applications. The manufacturing size of a single display panel is limited, and the larger the size, the higher the production and transportation costs. Multiple display panels need to be spliced ​​together to form larger spliced ​​display panels. However, in spliced ​​display panels, there are seams between adjacent panels, which will affect the user's viewing experience. Summary of the Invention

[0003] At least one embodiment of this disclosure provides a light guide member comprising: an upper light guide portion including a light emitting surface and a refractive surface; and a lower light guide portion disposed opposite to the upper light guide portion, including a light incident surface and a reflective surface. The light emitting surface and the light incident surface are arranged substantially parallel to each other, and the refractive surface and the reflective surface are disposed at the edge of the light guide member. The light guide member is configured such that: a first deflected ray entering the light incident surface is projected onto one of the refractive surface and the light emitting surface, and is refracted by the refractive surface and exited from the light guide member; a second deflected ray entering the light incident surface is projected onto the reflective surface, reflected by the reflective surface to one of the refractive surface and the light emitting surface, and is refracted by the refractive surface and exited from the light guide member.

[0004] For example, according to one or more embodiments of the present disclosure, the light guide member is configured such that when each point on the light surface and the refractive surface is observed from the side where the upper light guide is located at a viewing angle less than a first threshold angle, the observation can receive at least one of a first deflected ray or a second deflected ray.

[0005] For example, according to one or more embodiments of this disclosure, the light guide member is in the form of a single flat plate.

[0006] For example, according to one or more embodiments of the present disclosure, the light guide member extends in the extension direction with a constant light guide member cross-section, in which the refractive surface is a convex curved segment.

[0007] For example, according to one or more embodiments of the present disclosure, in the cross-section of the light guide member, the refractive surface extends continuously from the light emitting surface, the refractive surface is a continuous curved segment, and the angle of the tangent on the refractive surface at each point from the light emitting surface to the light incident surface with respect to the extension of the light emitting surface gradually increases.

[0008] For example, according to one or more embodiments of this disclosure, the refractive surface in the cross-section of the light guide member is a single arc segment.

[0009] For example, according to one or more embodiments of this disclosure, the radius of a single arc segment is in the range of 2-10 mm.

[0010] For example, according to one or more embodiments of the present disclosure, in the cross-section of the light guide member, the refractive surface includes a plurality of arc segments, wherein the diameter of the arc segments farther from the light-emitting surface is larger than the radius of the arc segments closer to the light-emitting surface.

[0011] For example, according to one or more embodiments of this disclosure, in the cross-section of the light guide member, the plurality of arcs include a first arc segment, a second arc segment, and a third arc segment that are sequentially moved away from the light-emitting surface. The radius of the first arc segment is smaller than the radius of the second arc segment, and the radius of the second arc segment is smaller than the radius of the third arc segment.

[0012] For example, according to one or more embodiments of this disclosure, the radii of the plurality of arc segments are in the range of 2-20 mm.

[0013] For example, according to one or more embodiments of this disclosure, in the cross-section of the light guide member, the reflective surface is a single straight segment, a convex arc segment, or a concave arc segment.

[0014] For example, according to one or more embodiments of this disclosure, the reflective surface includes a total reflective surface.

[0015] For example, according to one or more embodiments of this disclosure, the overall thickness of the light guide component in the cross-section of the light guide component is in the range of 5-20 mm, and the overall thickness is the distance between the light emitting surface and the light receiving surface.

[0016] For example, according to one or more embodiments of the present disclosure, in the cross-section of the light guide member, the first width of the refractive surface is in the range of 2-10 mm, the first thickness of the refractive surface is in the range of 2-8 mm, the second width is the distance the reflective surface extends in a direction parallel to the incident light surface, and the second thickness is the distance the reflective surface extends in a direction perpendicular to the incident light surface.

[0017] For example, according to one or more embodiments of the present disclosure, in the cross-section of the light guide member, the second width of the reflective surface is in the range of 0.64-2.15 mm, and the second thickness of the reflective surface is in the range of 2-16 mm. The second width is the distance the reflective surface extends in a direction parallel to the light incident surface, and the second thickness is the distance the reflective surface extends in a direction perpendicular to the light incident surface.

[0018] For example, according to one or more embodiments of the present disclosure, the light guide member further includes an abutment surface connected between the refractive surface and the reflective surface and perpendicular to the light emitting surface and the light incident surface, such that the light guide member abuts against adjacent light guide members through the abutment surface.

[0019] For example, according to one or more embodiments of this disclosure, the length of the contact surface is in the range of 0.3-1 mm.

[0020] At least one embodiment of this disclosure provides a display device, including: a plurality of display panels; and a light guide member according to the above description. A non-light-emitting seam is formed between two adjacent display panels. The light guide member is disposed on the display side of each display panel such that the light-incident surface is attached to the display panel, the refractive surface and the reflective surface are close to the seam, two adjacent light guide members are arranged symmetrically with respect to the seam, and the projection of the reflective surface on the display plane on which the display panel is located completely covers the seam.

[0021] For example, according to one or more embodiments of this disclosure, the seam includes a plurality of borders, each border surrounding each display panel, and the border has a first border segment extending around the display panel and perpendicular to the display plane on which the display panel is located, a second border segment extending from the first border segment toward the interior of the display panel, and a third border segment extending from the second border segment toward the interior of the display panel, the second border segment and the third border segment being on the display side of the display panel, and the border bending angle between the third border segment and the display plane being equal to the angle of the light guide member between the light incident surface and the reflective surface.

[0022] For example, according to one or more embodiments of this disclosure, the light guide member further includes an abutment surface that connects between the refractive surface and the reflective surface and is perpendicular to the light emitting surface and the light incident surface, and two adjacent light guide members abut against each other through the abutment surface. The seam includes a plurality of frames, each frame surrounding each display panel, and the frame has a first frame segment extending around the display panel and perpendicular to the display plane in which the display panel is located.

[0023] For example, according to one or more embodiments of this disclosure, in the cross-section of the light guide member, the second width of the reflective surface is in the range of L0 / 2 to L0 / 2+0.2 mm, where L0 is the width of the seam.

[0024] For example, according to one or more embodiments of this disclosure, the radius of a single arc segment is in the range of L0 / 2+0.5mm to L0 / 2+9mm, where L0 is the width of the seam.

[0025] For example, according to one or more embodiments of this disclosure, the display panel is a liquid crystal display panel.

[0026] At least one embodiment of this disclosure provides a manufacturing method for manufacturing the display device as described above, the method comprising: providing a display panel, wherein a non-light-emitting seam is formed between two adjacent display panels; providing a light guide member; and attaching the light guide member to the display side of the display panel such that a reflective surface abuts against a third frame segment to position the light guide member relative to the display panel.

[0027] At least one embodiment of this disclosure provides a manufacturing method for manufacturing a display device as described above, the method comprising: providing a display panel, wherein a non-light-emitting seam is formed between two adjacent display panels; providing a light guide member; and attaching the light guide member to the display side of the display panel such that an abutment surface is aligned with a first frame segment to position the light guide member relative to the display panel. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A plan view of a display panel is shown;

[0030] Figure 2 A cross-sectional view of a display device composed of at least two display panels joined together is shown at the seam.

[0031] Figure 3 A cross-sectional view of a portion of two adjacent and joined light guide members according to an embodiment of the present disclosure is shown;

[0032] Figure 4 and Figure 5 The following are shown respectively: Figure 3 A cross-sectional view of a portion of a display device showing two light guide components, wherein... Figure 4 Multiple first-deflection rays are shown. Figure 5 Multiple second-deflected rays are shown;

[0033] Figure 6 It shows Figure 3 Another cross-sectional view of a portion of the two light guide components shows two incident rays that are respectively incident on the refractive surface;

[0034] Figure 7 It shows Figure 3 Another cross-sectional view of a portion of the two light guide components shows an incident ray incident at the junction of the refractive surface and the light-emitting surface;

[0035] Figure 8 It shows Figure 3 Another cross-sectional view of a portion of the two light guide components shows another incident ray incident at the junction of the refractive surface and the light-emitting surface;

[0036] Figure 9A table showing the relationship between refractive index, viewing angle, and light guide member angle is presented when the reflecting surface is a non-total reflection surface;

[0037] Figure 10 A table showing the relationship between refractive index, viewing angle, and light guide member angle is presented when the reflecting surface is a total internal reflection surface;

[0038] Figure 11A-11C The optical path simulation diagrams of the light guide component under different seam widths, different viewing angles, different second thicknesses, and different second widths are shown respectively when the reflective surface is a non-total reflection surface.

[0039] Figure 12A-12F The optical path simulation diagrams of the light guide component under different seam widths, different viewing angles, different second thicknesses, and different second widths are shown respectively, with the reflective surface being a total reflection surface;

[0040] Figure 13 A cross-sectional view of a portion of a light guide member according to another embodiment of the present disclosure is shown;

[0041] Figure 14 A cross-sectional view of a portion of a light guide member according to yet another embodiment of the present disclosure is shown;

[0042] Figure 15 A cross-sectional view of a portion of a light guide member according to another embodiment of the present disclosure is shown;

[0043] Figure 16 A cross-sectional view of a portion of a display device according to another embodiment of the present disclosure is shown;

[0044] Figure 17 It shows Figure 16 A sectional view of the border and spacers in the middle;

[0045] Figure 18 It shows the manufacturing process. Figure 16 A flowchart of the display device shown;

[0046] Figure 19 It shows Figure 16 Another cross-sectional view of the display device shown illustrates the process of installing the light guide component;

[0047] Figure 20 A cross-sectional view of a portion of a display device according to yet another embodiment of the present disclosure is shown;

[0048] Figure 21 It shows the manufacturing process. Figure 20 The flowchart of the display device shown; and

[0049] Figure 22 It shows Figure 20Another cross-sectional view of the display device shown illustrates the process of installing the light guide component. Detailed Implementation

[0050] The imaging apparatus and electronic device including the present disclosure, according to embodiments thereof, will now be described in detail with reference to the accompanying drawings. To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure.

[0051] Therefore, the following detailed description of embodiments of the present disclosure provided in conjunction with the accompanying drawings is not intended to limit the scope of the claimed disclosure, but merely to illustrate selected embodiments of the disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without inventive effort are within the scope of protection of the present disclosure.

[0052] Unless the context otherwise defines, the singular form includes the plural form. Throughout this specification, the terms “comprising,” “having,” etc., are used herein to specify the presence of the stated features, numbers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, elements, components, or combinations thereof.

[0053] Furthermore, even if ordinal terms such as "first" and "second" are used to describe various components, these components are not limited by these terms, and these terms are only used to distinguish one component from other components.

[0054] Figure 1 A plan view of a display panel 200 is shown. (As shown) Figure 1As shown, the display panel 200 includes a light-emitting portion 210 and a non-light-emitting portion 220 that at least partially surrounds the light-emitting portion 210. The light-emitting portion 210 can emit display light for display, while the non-light-emitting portion 220 cannot emit display light, such as a border portion surrounding the display area. Here, the "display side" of the display panel 200 is defined as the side of the display panel 200 that emits display light. The display panel 200 can be, for example, a liquid crystal display (LCD) panel. An exemplary LCD panel includes a liquid crystal layer, a color filter (e.g., a filter substrate) sequentially arranged on one side of the liquid crystal layer, a first polarizer, an array substrate and a second polarizer sequentially arranged on the other side of the liquid crystal layer, and, if necessary, a backlight unit, etc., can also be provided for the LCD panel. In addition, the LCD panel also includes a circuit board, a border for protecting the display panel, etc., which are usually disposed at the edge of the LCD panel to form the non-light-emitting portion 220, etc. In addition, the display panel 200 can also be a plasma display panel (PDP), a light-emitting diode (LED) display panel, an organic light-emitting diode (OLED) display panel, a quantum dot light-emitting diode (QLED) display panel, etc.

[0055] Figure 2 A cross-sectional view of a display device composed of at least two display panels 200, 200' spliced ​​together is shown at the splicing seam (joining position). Figure 2 As shown, the display device includes a first display panel 200 and a second display panel 200', and a seam 300 between the first display panel 200 and the second display panel 200'. For example, the first display panel 200 and the second display panel 200' have the same specifications, such as the same size and structure, but the embodiments disclosed herein are not limited thereto. It should be noted that the seam 300 may include the non-light-emitting portion 220 of the display panel 200 and the non-light-emitting portion of the display panel 200'. Here, only two display panels 200 and 200' are shown spliced ​​together.

[0056] It should be understood that in the embodiments of this disclosure, the number of display panels 200, 200' spliced ​​together can be greater than two, and these multiple display panels 200 can be arranged in a straight line, in an array, or in other patterns. Because there are seams 300 between adjacent display panels 200, 200', the images displayed by the display device will contain dark areas caused by these seams 300, affecting the viewing experience. Therefore, it is necessary to eliminate these seams 300.

[0057] In this article, “eliminating” seams refers to making seams or dark areas caused by seams subjectively unobservable to viewers when viewing the displayed image from the display side of the display device.

[0058] Some embodiments of this disclosure provide a light guide member comprising an upper light guide portion and a lower light guide portion disposed opposite to the upper light guide portion. The upper light guide portion includes a light emitting surface and a refractive surface. The lower light guide portion includes a light incident surface and a reflective surface. The light emitting surface and the light incident surface are disposed substantially parallel. The refractive surface and the reflective surface are disposed at the edge of the light guide member. The light guide member is configured such that: a first deflected ray entering the light incident surface is projected onto one of the refractive surface and the light emitting surface, and is refracted by one of the refractive surface and the light emitting surface before being exited from the light guide member; a second deflected ray entering the light incident surface is projected onto the reflective surface, reflected by the reflective surface to one of the refractive surface and the light emitting surface, and is refracted by one of the refractive surface and the light emitting surface before being exited from the light guide member.

[0059] Here, "viewing angle" refers to the angle between the line of sight and the display direction, which is perpendicular to the display plane where the light guide component or display panel is located. Because the light guide component is configured such that the first deflected ray entering the light-receiving surface is projected onto one of the refractive and emitting surfaces, and then refracted by one of these surfaces before exiting the light guide component, at a smaller viewing angle, the light guide component refracts the light emitted by the luminous part of the display panel near the seam upwards. Because the light guide component is configured such that the second deflected ray entering the light-receiving surface is projected onto the reflective surface, reflected by the reflective surface onto one of the refractive and emitting surfaces, and then refracted by one of these surfaces before exiting the light guide component, at a larger viewing angle, the light guide component reflects and refracts the light emitted by the luminous part of the display panel near the seam and then exits at a large angle. Therefore, from a subjective observation perspective, within a certain viewing angle, or even the entire viewing angle, the luminous intensity at the seam is increased, thereby eliminating the seam.

[0060] The configuration of the light guide member according to several embodiments of the present disclosure is described in more detail below.

[0061] Figure 3 A cross-sectional view of a portion of two adjacent light guide members 100 spliced ​​together according to an embodiment of the present disclosure is shown. The two light guide members 100 are arranged at a constant angle as shown in the figure. Figure 3 The cross-section of the light guide component shown extends in a direction perpendicular to the plane of the paper. For example... Figure 3 As shown, the light guide member 100 includes an upper light guide portion and a lower light guide portion disposed opposite to the upper light guide portion, as well as an abutment surface 150 connecting the upper light guide portion and the lower light guide portion at the edge of the light guide member. The upper light guide portion has a light emitting surface 110 and a refractive surface 120; the lower light guide portion has a light-incident surface 130 parallel to the light emitting surface 110 and a reflective surface 140; the abutment surface 150 connects the refractive surface 120 and the reflective surface 140, and is perpendicular to the light emitting surface 110 and the light-incident surface 130, such that the light guide member abuts against adjacent light guide members through the abutment surface 150.

[0062] For ease of description, this paper defines three mutually perpendicular directions: "extension direction," "horizontal direction," and "vertical direction." "Extension direction" refers to the direction in which the light guide component 100 extends with a constant cross-section (perpendicular to the plane of the paper in the figure). "Horizontal direction" refers to the direction parallel to the light-emitting surface 110 and the light-incident surface 130 within the cross-section of the light guide component (left-right direction in the figure). "Vertical direction" refers to the direction perpendicular to the light-emitting surface 110 and the light-incident surface 130 within the cross-section of the light guide component (up-down direction in the figure).

[0063] For example, the light guide component 100 is flat and extends in the horizontal direction.

[0064] The overall thickness D0 of the light guide member 100 is defined as the distance the light guide member 100 extends in the vertical direction, that is, the distance between the light emitting surface 110 and the light incident surface 130. For example, the overall thickness D0 is in the range of 5 to 20 mm.

[0065] In this embodiment, the refractive surface 120 is a single arc segment. The radius R0 of the arc segment of the refractive surface 120 is, for example, in the range of 2 to 10 mm. For example, the radius of the single arc segment is in the range of L0 / 2 + 0.5 mm to L0 / 2 + 9 mm, where L0 is the width of the seam 300. The first thickness D1 of the refractive surface 120 is defined as the distance the refractive surface 120 extends in the horizontal direction, which is, for example, in the range of 2 to 8 mm. The first width L1 of the refractive surface 120 is defined as the distance the refractive surface 120 extends in the vertical direction, which is, for example, in the range of 2 to 10 mm.

[0066] In this embodiment, the reflective surface 140 is a straight segment. The second thickness D2 of the reflective surface 140 is defined as the distance the reflective surface 140 extends in the horizontal direction, which is, for example, in the range of 2 to 16 mm. The second width L2 of the reflective surface 140 is defined as the distance the refracting surface 120 extends in the vertical direction. For example, the second width L2 is in the range of 0.64 to 2.15 mm. For example, the second width L2 is in the range of L0 / 2 to L0 / 2+0.2 mm, where L0 is the width of the seam 300.

[0067] In this embodiment, the length of the contact surface 150 is in the range of 0.3-1.0 mm. For example... Figure 3As shown, the light guide members 100 are arranged symmetrically so that their respective abutment surfaces 150 face and abut against each other. These abutment surfaces 150 help eliminate sharp corners that would occur when the refractive surface 120 and the incident surface 130 are directly connected to each other, and facilitate accurate positioning and reliable assembly of the two light guide members 100. Furthermore, the abutment surfaces 150 can also be used to position the light guide members 100 relative to other components. For example, the abutment surfaces 150 can be aligned with the bezel in the seam 300 to position the light guide members 100 relative to the display panel 200. In some other embodiments, the abutment surfaces 150 can be omitted. In the case of omitting the abutment surfaces 150, the refractive surface 120 can, for example, be directly connected to the reflective surface 140.

[0068] Figure 4 and Figure 5 It shows including Figure 3 A cross-sectional view of a portion of the display device showing the two light guide members 100. Figure 4 The first deflected ray of the light guide member 100 is shown. Figure 5 The second deflected ray of the light guide member 100 is shown. For example... Figure 4 and Figure 5 As shown, the display device includes multiple display panels 200 ( Figure 4 and Figure 5 Two light guide members 100 are shown in the diagram, and one is disposed on the display side of the display panel 200, forming a non-light-emitting seam 300 between two adjacent display panels 200. The light guide members 100 can be arranged symmetrically with respect to the seam 300, such that the light-incident surface 130 is attached to the display panel 200 and the refractive surface 120 and the reflective surface 140 are adjacent to the seam 300. The projection of the reflective surface 140 on the display plane of the display panel 200 completely covers the seam 300.

[0069] It should be noted that the light guide member 100 can also be placed on other light-emitting members, including light-emitting and non-light-emitting parts, such that the light-incident surface 130 of the light guide member 100 is placed above the light-emitting part of the light-emitting member and the reflective surface 140 of the light guide member 100 is placed above the non-light-emitting part of the light-emitting member. When the light-emitting member includes a display panel 200, the light-emitting part is the light-emitting part 210 of the display panel 200, and the non-light-emitting part is the seam 300 formed by the non-light-emitting part 220 of the display panel 200 and the frame, etc.

[0070] Each light guide component 100 is configured such that: a first deflected ray entering the light incident surface 130 is projected onto one of the refractive surface 120 and the light emitting surface 110, and is refracted by one of the refractive surface 120 and the light emitting surface 110 before being exited from the light guide component; a second deflected ray entering the light incident surface 130 is projected onto the reflective surface 140, is reflected by the reflective surface 140 onto one of the refractive surface 120 and the light emitting surface 110, and is refracted by one of the refractive surface 120 and the light emitting surface 110 before being exited from the light guide component.

[0071] From a subjective observation perspective, the light guide component 100 eliminates the seam 300 within a certain viewing angle. Specifically, as... Figure 4 As shown, since the light guide member is configured such that the first deflected ray entering the light-incident surface 130 is projected onto one of the refractive surface 120 and the light-emitting surface 110, and is refracted by one of the refractive surface 120 and the light-emitting surface 110 before being led out of the light guide member, at a smaller viewing angle, the refractive surface 120 of the light guide member 100 refracts the light emitted by the light-emitting portion of the display panel 200 near the seam 300 to above the seam 300. Specifically, as Figure 5 As shown, because the light guide member is configured such that the second deflected light entering the light-incident surface 130 is projected onto the reflective surface 140, reflected by the reflective surface 140 to one of the refractive surface 120 and the light-emitting surface 110, and then refracted by one of the refractive surface 120 and the light-emitting surface 110 before being exited through the light guide member, at a wider viewing angle, the reflective surface 140 of the light guide member 100 reflects the light emitted by the light-emitting portion of the display panel 200 at the adjacent seam 300 to the light-incident surface 130, and then the light is refracted by the light-incident surface 130 and emitted at a large angle. Therefore, from a subjective observation perspective, within a certain viewing angle, the light intensity at the seam 300 is increased, thereby eliminating the seam 300. Therefore, when an observer's eye (or other light receiver) views the image displayed on the display panel 200 via the light guide member 100 on the display side, they will not see the seam 300 between the display panels 200, thereby improving the user experience.

[0072] By appropriately setting the contours and dimensions of each part of the light guide member 100, the light guide member 100 can be configured such that when observing each point on the refractive surface 120 and the light-emitting surface 110 from the display side where the upper light guide is located at a viewing angle smaller than a first threshold angle, the observation can receive at least one of the first deflected light rays or the second deflected light rays. Therefore, the light guide member 100 can eliminate the seam 300 at a viewing angle smaller than the first threshold angle. For example, the first threshold angle can be 90°, 80°, 70°, 60°, 50°, or 40°, etc. When the first threshold angle is 90°, the light guide member 100 allows the seam 300 to be eliminated at all viewing angles, thereby achieving a subjective feeling of visually seamless seams 300 and realizing the complete display of the spliced ​​image at all viewing angles.

[0073] In this embodiment, the light guide component 100 is integrally formed. For example, the material of the light guide component 100 can be transparent materials such as glass, polycarbonate (PC), or polymethyl methacrylate (PMMA). Compared to a light guide component composed of multiple separate sub-optical components, in this embodiment, since the light guide component 100 is a single unit, its light guiding effect is not affected by the assembly and positioning of multiple separate sub-optical components, and its manufacturing cost is lower. For example, the light guide component 100 can be formed by molding.

[0074] In some embodiments, a light guide component, such as a prism, can be used to shift the display light emitted by the display panel as a whole towards the seam, thereby eliminating the seam. However, this solution for eliminating seams is not suitable for situations where multiple display panels are spliced ​​together, such as when multiple display panels are spliced ​​in an array, because this solution cannot eliminate all seams around the display panels. In the embodiments of this disclosure, since the refractive surface 120 of the light guide component 100 adopts a convex curved segment, such as a single arc segment, the display image emitted by the display panel 200 can be magnified to eliminate the seam 300. Since the light guide component 100 not only shifts the display light as a whole but also magnifies the display image, the light guide component 100 can improve the display effect, and is particularly suitable for eliminating the seam 300 in multiple spliced ​​display panels 200.

[0075] In the cross-section of the light guide component, the refractive surface 120 extends continuously from the light-emitting surface 110. The refractive surface 120 is a continuous curved segment, and the angle of the tangent on the refractive surface 120 at each point from the light-emitting surface 110 to the light-incident surface 130 relative to the extension line of the light-emitting surface 110 gradually increases. This helps to better eliminate the seam 300 and improve the display effect.

[0076] In this embodiment, the refractive surface 120 is a single arc segment. A single arc segment helps reduce abrupt changes in the angle of light emitted at the refractive surface 120. In other embodiments, the refractive surface 120 may also have other contours; for example, the refractive surface 120 may include multiple arc segments.

[0077] Figure 13 A cross-sectional view of a portion of a light guide member 100 according to another embodiment of the present disclosure is shown. Figure 13As shown, the light guide component 100 includes a third arc segment 123, a second arc segment 122, and a first arc segment 121, which are sequentially located away from the light-emitting surface 110. The first radius R1 of the first arc segment 121 is smaller than the second radius R2 of the second arc segment 122, and the second radius R2 of the second arc segment 122 is smaller than the third radius R3 of the third arc segment 123. The smaller the radius of the arc segment, the better the refraction effect. The first arc segment 121 is used to improve the elimination effect of the seam 300 at a smaller viewing angle, and the second arc segment 122 is used to improve the elimination effect of the seam 300 at a larger viewing angle. The multiple arc segments allow the refraction surface 120 to achieve the elimination effect of the seam 300 at both larger and smaller viewing angles. For example, the radii of the first arc segment 121, the second arc segment 122, and the third arc segment 123 can be in the range of 2 to 20 mm.

[0078] In this embodiment, the reflective surface 140 is a single straight line segment. Designing the reflective surface 140 as a single straight line segment avoids image abrupt changes such as image distortion, ensuring image continuity. In other embodiments, the reflective surface 140 may also have other contours; for example, the reflective surface 140 may also be a convex curve or a concave curve.

[0079] Figure 14 A cross-sectional view of a portion of a light guide member 100 according to yet another embodiment of the present disclosure is shown. Figure 14 As shown, the reflecting surface 140 can be a convex arc segment. Figure 15 A cross-sectional view of a portion of a light guide member 100 according to another embodiment of the present disclosure is shown. Figure 15 As shown, the reflecting surface 140 can be a concave arc segment.

[0080] The reflective surface 140 is configured as either a non-total reflective surface or a total reflective surface. A reflective surface 140 configured as a total reflective surface helps to eliminate the seam 300 from a wider viewing angle. For example, a total reflective layer, such as a silver reflective layer, can be applied to the surface of the reflective surface 140 to achieve total reflection of the reflective surface 140.

[0081] When the reflective surface 140 is configured as a total reflection surface, the reflective surface 140 can be processed by the following steps:

[0082] To create a screen printing plate, for example, by stretching silk fabric, synthetic fiber fabric or metal wire in a mesh on a frame, or by using manual lacquer film cutting or photochemical plate making methods.

[0083] Color matching and formulation of reflective materials to obtain reflective materials with suitable reflectivity and color;

[0084] A light guide component 100 is provided, and the reflective surface 140 is subjected to light-splitting treatment;

[0085] Reflective material is printed on the reflective surface 140 using a screen printing plate. Specifically, the light guide component 100 can be placed on a support so that the light guide component 100 can move during printing; and

[0086] Drying and inspection.

[0087] Furthermore, the reflective surface 140 can also have reflective material attached via an optically clear adhesive, thereby achieving total internal reflection. The optically clear adhesive can be, for example, OCA (optical clear adhesive) or OCR (optical clear resin). For example, the OCA adhesive can be a double-sided adhesive tape with an optically release polyethylene terephthalate (PET) film layered on both the top and bottom layers as a substrate. The OCR adhesive can be, for example, an acrylic resin adhesive or a silicone adhesive, and its curing method can be thermosetting, UV curing, etc. The optically clear adhesive avoids or reduces scattering at the reflective surface 140.

[0088] Furthermore, a reflective layer can be deposited on the reflective surface 140 using a chemical vapor deposition process to give the reflective surface 140 total reflection characteristics. The reflective layer is, for example, a metal layer such as aluminum or gallium, or a metal compound layer such as trimethylaluminum or trimethylgallium.

[0089] The length of the contact surface 150 is in the range of 0.3-1mm.

[0090] As described above, by reasonably setting the contours and dimensions of each part of the light guide member 100, the light guide member 100 can eliminate the seam 300 within a viewing angle less than a first threshold angle. The above content and the content discussed below describe the influence of the contours and dimensions of the light guide member 100 on its elimination of the seam 300.

[0091] Figure 6 It shows Figure 3 A cross-sectional view of a portion of the two light guide members 100, showing two incident light rays incident on the refractive surface 120. (As shown) Figure 6As shown, the first incident ray and the second incident ray are parallel to each other. The first incident ray enters the light guide member 100 at the junction of the refractive surface 120 and the light-emitting surface 110 at a first incident angle α, and is refracted at the refractive surface 120 to have a first exit angle β. Then, the first incident ray enters the reflective surface 140 and is reflected at a first reflection angle γ to be parallel to the light-incident surface 130 (i.e., the horizontal direction). The second incident ray enters the light guide member 100 from the refractive surface 120 at a second incident angle α', and is refracted at the refractive surface 120 to have a second exit angle β'. Then, the second incident ray enters the reflective surface 140 and is reflected at a second reflection angle γ' to the light-incident surface 130. It can be seen that as the incident point moves further away from the light-emitting surface 110, the incident angle of the incident ray entering the refractive surface 120 increases (α < α'), and its refraction angle at the refractive surface 120 (β < β') and reflection angle at the reflecting surface 140 (γ < γ') also increase, making it easier to enter the light-emitting surface 130. Since the light path is reversible, for observations following the second deflected ray, when observing a point on the refractive surface 120, the further away from the light-emitting surface 110, the larger the viewing angle that eliminates the seam 300. Therefore, the following analysis only considers the incident ray at the junction of the refractive surface 120 and the light-emitting surface 110.

[0092] Figure 7 It shows Figure 3 Another cross-sectional view of a portion of the two light guide components 100 shows an incident ray incident at the junction of the refractive surface 120 and the light-emitting surface 110. (See image below.) Figure 7 As shown, the incident light ray enters the light guide member 100 at the light exiting surface 110 at an incident angle α, and is refracted at the refractive surface 120 to have an exit angle β. Then, the incident light ray enters the reflective surface 140 and is reflected at a reflection angle γ to become parallel to the light entrance surface 130. Furthermore, Figure 7 The angle θ of the light guide member between the incident surface 130 and the reflecting surface 140 is also shown.

[0093] According to the law of refraction, we can obtain:

[0094] n = sinα / sinβ, that is, β = arcsin(sinα / n) (1.1), where n is the refractive index of the material of the optical component;

[0095] According to the law of reflection, we can obtain:

[0096] θ+γ=90°, that is, γ=90°-θ (1.2);

[0097] Since the light rays are parallel to the incident surface 130 after being reflected by the reflecting surface 140, we can conclude that:

[0098] γ+γ+β=90° (1.3);

[0099] From formulas (1.1), (1.2), and (1.3), we can obtain:

[0100] (90°-θ)+(90°-θ)+arcsin(sinα / n)=90°, that is

[0101] θ=45°+arcsin(sinα / n) / 2 (1.4).

[0102] As shown in formula (1.4), the larger the angle θ of the light guide component and the larger the refractive index n of the optical component material, the larger the incident angle α. Since the light path is reversible, in order to achieve a larger viewing angle, it is necessary to increase the angle θ of the light guide component or select a transparent material with a high refractive index, such as PC.

[0103] For example, when the material of the light guide component 100 is PC, the refractive index of this material is n = 1.6. If the viewing angle needs to reach a full 90-degree angle, then the minimum angle θ of the light guide component is 45° + arcsin(sin90° / 1.6) / 2 = 64.3°. For example, when the material of the light guide component 100 is PMMA, the refractive index of this material is n = 1.5. If the viewing angle needs to reach a full 90-degree angle, then the minimum angle θ of the light guide component is θ = 45° + arcsin(sin90° / 1.5) / 2 = 65.9°.

[0104] Figure 8 It shows Figure 3 Another cross-sectional view of a portion of the two light guide components 100 shows another incident ray incident at the junction of the refractive surface 120 and the light-emitting surface 110. (See image below.) Figure 8 As shown, the incident light ray enters the light guide member 100 at the light exiting surface 110 at an incident angle α, and is refracted at the refractive surface 120 to have an exit angle β. Then, the incident light ray enters the reflective surface 140 and is reflected at a reflection angle γ to form an exit angle Ω with respect to the incident surface 130 (horizontal direction). Furthermore, Figure 8 The angle ε between the incident light and the reflecting surface 140 after the incident light is reflected at the reflecting surface 140 is also shown, as well as the angle θ of the light guide between the incident surface 130 and the reflecting surface 140.

[0105] When the reflecting surface 140 is a non-total reflection surface, assuming that the incident light ray is incident at the critical reflection angle at the reflecting surface 140, the analysis is as follows:

[0106] According to the law of refraction, we can obtain:

[0107] n = sinα / sinβ, that is, β = arcsin(sinα / n) (2.1), where n is the refractive index of the material of the optical component;

[0108] According to the law of total internal reflection, we can obtain:

[0109] sinγ / sin90°=n, that is, γ=arc sin(1 / n) (2.2);

[0110] By drawing an auxiliary line parallel to the incident light plane 130°, we can obtain:

[0111] β+γ+δ=90°, that is, δ=90°-β-γ (2.3);

[0112] and

[0113] θ+δ=90°, that is, θ=90°-δ (2.4);

[0114] Substituting formulas (2.1), (2.2), and (2.3) into formula (2.4), we get...

[0115] θ=arc sin(sinα / n)+arc sin(1 / n) (2.5).

[0116] As can be seen from formula (1.4), the larger the angle θ of the light guide component, the larger the incident angle α; the larger the refractive index n of the material of the optical component, the larger the incident angle α.

[0117] When the reflecting surface 140 is a total internal reflection surface, the analysis of the incident light ray is as follows:

[0118] According to the law of refraction, we can obtain:

[0119] n = sinα / sinβ, that is, β = arcsin(sinα / n) (3.1), where n is the refractive index of the material of the optical component;

[0120] From the law of reflection, we can obtain:

[0121] ε+γ=90°, that is, ε=90°-γ (3.2);

[0122] By drawing an auxiliary line parallel to the incident light plane 130°, we can obtain:

[0123] θ=Ω+ε, that is, ε=θ-Ω (3.3);

[0124] and

[0125] β+γ+(γ-Ω)=90°, that is, γ=(90°-β+Ω) / 2 (3.4);

[0126] From formulas (3.2) and (3.3), we can obtain that

[0127] 90°-γ=θ-Ω, that is, θ=90°+Ω-γ (3.5);

[0128] Substituting formulas (3.1) and (3.4) into formula (3.5) yields...

[0129] θ=90°+Ω-{90°-arcsin(sinα / n)+Ω} / 2,

[0130] That is, θ=45°+Ω / 2+arcsin(sinα / n) / 2 (3.6).

[0131] As shown in formula (3.6), under the same viewing angle (incident angle α), the angle θ of the light guide component is positively correlated with the exit angle Ω. The larger the exit angle Ω, the stronger the light intensity, and the better the reinforcement effect for oblique viewing angles. The larger the angle θ of the light guide component, the larger the angle Ω, and the better the oblique viewing angle effect.

[0132] Figure 9 A table showing the relationship between refractive index n, viewing angle (incident angle α), and light guide member angle θ is presented when the reflective surface 140 is a non-total reflective surface. Here, the width of the seam 300 is set to 0.9 mm and 1.3 mm, respectively. The light guide member angle θ is obtained according to formula (2.5). The second width L2 of the reflective surface 140 is set according to the width of the seam 300, and then the second thickness D2 of the reflective surface 140 is obtained according to the light guide member angle θ.

[0133] Figure 10 A table showing the relationship between refractive index n, viewing angle (incident angle α), and light guide member angle θ is presented when the reflecting surface 140 is a total internal reflection surface. Here, the exit angle Ω is set to 10°, and the width of the seam 300 is set to 0.9 mm and 1.3 mm, respectively. The light guide member angle θ is obtained according to formula (3.6). The second width L2 of the reflecting surface 140 is set according to the width of the seam 300, and then the second thickness D2 of the reflecting surface 140 (D2 = tanθ * L2) is obtained according to the light guide member angle θ.

[0134] Depend on Figure 9 and Figure 10 It can be seen that,

[0135] • For the same refractive index n, the larger the angle θ of the light guide component, the larger the viewing angle.

[0136] • At the same viewing angle, the refractive index n is inversely related to the angle θ of the light guide component;

[0137] Compared to making the reflective surface 140 a non-total reflective surface, making the reflective surface 140 a total reflective surface helps to reduce the angle θ and the second thickness D2 of the light guide component, which is beneficial to reducing the thickness and material cost of the light guide component 100.

[0138] Figure 11A-11CThe optical path simulation diagrams of the light guide component 100 under different seam widths L0, different viewing angles, different second thicknesses D2, and different second widths L2 are shown respectively when the reflective surface 140 is a non-total reflection surface.

[0139] Figure 12A-12F The optical path simulation diagrams of the light guide component 100 under different seam widths L0, different viewing angles, different second thicknesses D2, and different second widths L2 are shown respectively when the reflective surface 140 is a total reflective surface.

[0140] Figure 11A A simulated optical path diagram of the light guide component 100 is shown, where the reflective surface 140 is a non-total reflection surface, the viewing angle is 45°, the seam width L0 is 0.9 mm, the second width L2 is 1 mm, and the second thickness D2 is 4 mm. (See diagram for reference.) Figure 11A As shown, a portion of the light rays will be refracted at the reflective surface 140 (within the dashed circle) and exit from the light guide member 100. Since the light path is reversible, the area of ​​the seam 300 into which this portion of the light rays is incident does not receive light compensation, and therefore the seam is visible in this area.

[0141] Figure 12A-12D The optical path simulation diagrams of the light guide component 100 are shown for the following scenarios: the reflective surface 140 is a total reflection surface; the seam width L0 is 0.9 mm; the second width L2 is 1 mm; the second thickness D2 is 4 mm; and the viewing angles are 50°, 60°, 70°, and 80°. Figure 12A-12D It can be seen that by setting the reflective surface 140 as a total reflective surface, the seam 300 can be eliminated from all viewing angles.

[0142] Figure 11B The diagram shows a simulated optical path of the light guide component 100 with the reflective surface 140 being a non-total reflection surface, the seam width L0 being 1.3 mm, the second width L2 being 1.4 mm, the second thickness D2 being 6 mm, and the viewing angle being 60°. Figure 11C The diagram shows a simulated optical path of the light guide component 100 with the reflective surface 140 being a non-total reflection surface, the seam width L0 being 1.3 mm, the second width L2 being 1.4 mm, the second thickness D2 being 8 mm, and the viewing angle being 70°. Figure 12E and Figure 12F The optical path simulation diagrams of the light guide component 100 are shown when the reflective surface 140 is a total reflection surface, the seam width L0 is 1.3 mm, the second width L2 is 1.4 mm and the second thickness D2 is 4 mm, and the viewing angles are 60° and 70°, respectively.

[0143] Depend on Figure 11A-11C , Figure 12A-12FIt can be seen that, under the same seam length and viewing angle, compared to the non-total reflection surface 140, setting the reflection surface 140 as a total reflection surface helps to reduce the second thickness D2, thereby reducing the overall thickness D0 of the light guide component 100.

[0144] Based on the above formula derivation and optical path simulation, the design of the contour and dimensions of the light guide component 100 can be carried out as follows:

[0145] The second width L2 is set according to the seam width L0.

[0146] If reducing the thickness of the light guide component 100 is a priority, a material with a high refractive index (such as PC) should be selected, the reflective surface 140 should be set as a total reflection surface, and the maximum viewing angle should be appropriately reduced as needed (such as designed according to 70° or 80°).

[0147] If the maximum viewing angle is taken into consideration, materials with a high refractive index (such as PC) will have the reflective surface 140 set as a total reflection surface, and the second thickness D2 (i.e., the angle θ of the light guide component) will be appropriately increased as needed.

[0148] Some embodiments of this disclosure also provide a display device including a plurality of display panels 200 and a light guide member 100 as described above, wherein a non-light-emitting seam 300 is formed between two adjacent display panels 200. Since the light guide member 100 includes a first deflected light beam and a second deflected light beam on the display light emitted from the display panels 200, the dark areas of the display device caused by the seam 300 are eliminated, thereby improving the display effect of the display device.

[0149] For example, a light guide member 100 is disposed on the display side of each display panel 200, such that the light incident surface 130 of the light guide member 100 is attached to the display panel 200, the refractive surface 120 and the reflective surface 140 are adjacent to the seam 300, two adjacent light guide members 100 are arranged symmetrically with respect to the seam 300, and the projection of the reflective surface 140 on the display plane of the display panel 200 completely covers the seam 300.

[0150] Some embodiments of this disclosure also provide a manufacturing method for manufacturing the display device as described above, comprising the following steps:

[0151] Multiple display panels 200 are provided, wherein two adjacent display panels 200 are spliced ​​together to form a seam 300 between them;

[0152] Provide light guide component 100; and

[0153] The light guide component 100 is attached to the display side of the display panel 200.

[0154] Figure 16A cross-sectional view of a portion of a display device according to an embodiment of the present disclosure is shown. Figure 17 It shows Figure 16 A sectional view of the border 400 and the spacer 500 in the middle.

[0155] like Figure 16-18 As shown, the display device includes a display panel 200, a light guide member 100 disposed on the display side of the display panel 200, and a bezel 400 surrounding the display panel 200. The bezel 400 includes a first bezel segment 410, a second bezel segment 420, and a third bezel segment 430. The first bezel segment 410 surrounds the display panel 200 and extends vertically perpendicular to the display plane where the display panel 200 is located; the second bezel segment 420 extends horizontally from the first bezel segment 410 toward the interior of the display panel 200; and the third bezel segment 430 extends horizontally from the second bezel segment 420 toward the interior of the display panel 200. The second bezel segment 420 and the third bezel segment 430 are located on the display side of the display panel 200. A spacer 500 is attached to the side of the second bezel segment 420 facing the display panel 200 to buffer the force between the bezel 400 and the non-light-emitting portion of the display panel 200. The reflective surface 140 of the light guide member 100 abuts against the third frame segment 430 to position the light guide member 100 relative to the display panel 200. The bend angle ζ between the third frame segment 430 and the display plane where the display panel 200 is located is equal to the light guide member angle θ between the incident surface 130 and the reflective surface 140. The space enclosed by the frame 400 can be used to accommodate structures such as a backlight unit 600 and a circuit board.

[0156] Figure 18 It shows the manufacturing process. Figure 16 The flowchart of the display device shown is as follows. Figure 19 It shows Figure 16 Another cross-sectional view of the display device shown illustrates the process of installing the light guide component 100.

[0157] Figure 19 As shown, the manufacturing process of the display device includes the following steps:

[0158] • Step S11 provides a display panel 200, wherein a non-light-emitting seam 300 is formed between two adjacent display panels 200;

[0159] Step S13 provides the light guide component 100; and

[0160] • In step S15, the light guide member 100 is attached to the display side of the display panel 200, such that the reflective surface 140 abuts against the third frame segment 430 to position the light guide member 100 relative to the display panel 200.

[0161] Since the bend angle ζ of the frame is equal to the angle θ of the light guide component, the light guide component 100 can be easily positioned relative to the display panel 200, and the requirements for equipment precision are low.

[0162] Attaching the light guide member 100 to the display side of the display panel 200 includes:

[0163] • Attach the OCA tape to the light guide member 100 near the connection point between the light incident surface 130 and the reflective surface 140. The edge of the OCA tape is about 2 mm away from the connection point, and the width of the OCA tape is about 5 mm.

[0164] With the reflective surface 140 of the light guide member 100 abutting against the third frame segment 430 of the frame 400, the light guide member 100 is moved from the display side (above) of the display panel 200 toward the display panel 200 (for example, in the direction indicated by arrow F1, so that the reflective surface 140 slides on the third frame segment 430) until the OCA tape bonds the light guide member 100 to the display device (e.g., ...). Figure 19 (as shown); and

[0165] • Apply pressure toward the display panel 200 to the light guide member 100 for a period of time to firmly bond the light guide member 100 to the display panel 200.

[0166] Figure 20 A cross-sectional view of a portion of a display device according to yet another embodiment of the present disclosure is shown.

[0167] like Figure 20 As shown, the display device includes a display panel 200, a light guide member 100 disposed on the display side of the display panel 200, and a frame 400 surrounding the display panel 200. The frame 400 has a first frame segment 410 extending vertically around the display panel 200 and perpendicular to the display plane where the display panel 200 is located, and a second frame segment 420 extending horizontally from the first frame segment 410 toward the interior of the display panel 200. The first frame segment 410 is flush with the abutment surface 150 of the light guide member 100. The space surrounded by the frame 400 can be used to accommodate structures such as a backlight unit 600 and a circuit board.

[0168] Figure 21 It shows the manufacturing process. Figure 20 The flowchart of the display device shown is as follows. Figure 22 It shows Figure 20 Another cross-sectional view of the display device shown illustrates the process of installing the light guide component 100.

[0169] Figure 21 As shown, the manufacturing process of the display device includes the following steps:

[0170] • Step S21 provides a display panel 200, wherein a non-light-emitting seam 300 is formed between two adjacent display panels 200;

[0171] Step S23 provides the light guide component 100; and

[0172] • Step S25: Attach the light guide member 100 to the display side of the display panel 200, such that the abutment surface 150 of the light guide member 100 is aligned with the first frame segment 410 to position the light guide member 100 relative to the display panel 200.

[0173] Since the abutment surface 150 is used for aligning the first frame segment 410 to position the light guide member 100 relative to the display panel 200, the light guide member 100 can be conveniently positioned relative to the display panel 200. For example, attachment can be performed using a robotic arm under image guidance, resulting in high assembly accuracy. In this method, the frame 400 does not require special bending treatment. In this embodiment, the refractive surface 120 has a free end, which has a gap with the light guide member 100. However, this disclosure is not limited to this; in other embodiments, a frame 400 with a third frame segment 430 can also be used to guide the light guide member 100.

[0174] Attaching the light guide member 100 to the display side of the display panel 200 includes:

[0175] • Use a robotic arm to grasp the light guide component 100 and apply OCR adhesive to the connection point between the light incident surface 130 and the reflective surface 140 of the light guide component 100. The distance between the edge of the adhesive-coated area and the connection point is about 2 mm (about 4.6 mm from the outer edge of the frame 400), and the width of the OCR adhesive area is about 5 mm.

[0176] Guided by an image sensor such as a CCD, the light guide member 100 is moved from the display side (above) of the display panel 200 toward the display panel 200 (e.g., in the direction indicated by arrow F2, i.e., vertically), and the abutment surface 150 is aligned with the first bezel segment 410 (its outer edge) until the OCR tape bonds the light guide member 100 to the display device (e.g., ...). Figure 22 (as shown); and

[0177] • Apply pressure toward the display panel 200 to the light guide member 100 for a period of time to firmly bond the light guide member 100 to the display panel 200.

[0178] The scope of this disclosure is not limited by the embodiments described above, but by the appended claims and their equivalents.

Claims

1. A light guide member, comprising: an upper light guide portion including an exit face and a refractive face; and a lower light guide portion disposed opposite to the upper light guide portion, the lower light guide portion including an entrance face and a reflective face; wherein the exit face and the entrance face are disposed in parallel, and the refractive face and the reflective face are disposed at edges of the light guide member, the light guide member is configured such that a first deflected light ray entering the entrance face is projected to one of the refractive face and the exit face and is guided out of the light guide member after being refracted by the one of the refractive face and the exit face, and a second deflected light ray entering the entrance face is projected to the reflective face, reflected by the reflective face to the one of the refractive face and the exit face, and guided out of the light guide member after being refracted by the one of the refractive face and the exit face; in a cross section of the light guide member, the reflective face is a single convex circular arc segment protruding towards an inside of the light guide member; and a material of the light guide member is a transparent material. 2.The light guide member according to claim 1, wherein the light guide member is configured such that: when each point on the exit face and the refractive face is observed from a side where the upper light guide portion is located at a viewing angle smaller than a first threshold angle, the observation is capable of receiving at least one of the first deflected light ray or the second deflected light ray. 3.The light guide member according to claim 1 or 2, wherein the light guide member is in a form of an integral flat plate. 4.The light guide member according to claim 1 or 2, wherein the light guide member extends in a constant cross section of the light guide member in an extension direction, and in the cross section of the light guide member, the refractive face is a convex curve segment. 5.The light guide member according to claim 4, wherein in the cross section of the light guide member, the refractive face continuously extends from the exit face, the refractive face is a continuous curve segment, and an angle of a tangent line at each point on the refractive face from the exit face to the entrance face gradually increases with respect to an extension line of the exit face. 6.The light guide member according to claim 5, wherein in the cross section of the light guide member, the refractive face is a single circular arc segment. 7.The light guide member according to claim 6, wherein a radius of the single circular arc segment is in a range of 2-10 mm. 8.The light guide member according to claim 5, wherein in the cross section of the light guide member, the refractive face includes a plurality of circular arc segments, and a diameter of a circular arc segment far from the exit face is larger than a radius of a circular arc segment close to the exit face. 9.The light guide member according to claim 8, wherein in the cross section of the light guide member, the plurality of circular arc segments include a third circular arc segment, a second circular arc segment and a first circular arc segment in turn far from the exit face, a radius of the first circular arc segment is smaller than a radius of the second circular arc segment, and a radius of the second circular arc segment is smaller than a radius of the third circular arc segment. 10.The light guide member according to claim 8, wherein radii of the plurality of circular arc segments are in a range of 2-20 mm. 11.The light guide member according to claim 1 or 2, wherein the reflective face includes a total reflection surface. ​ 12. The light guide member according to claim 1 or 2, wherein In the cross section of the light guide member, an overall thickness of the light guide member is in a range of 5-20 mm, the overall thickness being a distance between the light exit face and the light entrance face.

13. The light guide member according to claim 1 or 2, wherein In the cross section of the light guide member, a first width of the refractive face is in a range of 2-10 mm, a first thickness of the refractive face is in a range of 2-8 mm, the first width being a distance over which the refractive face extends in a direction parallel to the light entrance face, the first thickness being a distance over which the refractive face extends in a direction perpendicular to the light entrance face.

14. The light guide member according to claim 1 or 2, wherein In the cross section of the light guide member, a second width of the reflective face is in a range of 0.64-2.15 mm, a second thickness of the reflective face is in a range of 2-16 mm, the second width being a distance over which the reflective face extends in a direction parallel to the light entrance face, the second thickness being a distance over which the reflective face extends in a direction perpendicular to the light entrance face.

15. The light guide member of claim 1 or 2, further comprising an abutment surface, wherein, the abutment face is connected between the refractive face and the reflective face and is perpendicular to the light exit face and the light entrance face, so that the light guide member and an adjacent light guide member abut against each other via the abutment face.

16. The light guide member of claim 15, wherein, a length of the abutment face is in a range of 0.3-1 mm.

17. A display device, comprising: a plurality of display panels, between which two adjacent display panels, a joint is formed which does not emit light rays; and a light guide member according to any one of claims 1-16, the light guide member being arranged on a display side of each display panel, so that the light entrance face is attached to the display panel, the refractive face and the reflective face are adjacent to the joint, two adjacent light guide members are symmetrically arranged with respect to the joint, and a projection of the reflective face on a display plane in which the display panel is located completely covers the joint.

18. The display device according to claim 17, wherein the joint comprises a plurality of bezels, each of which surrounds each display panel, and the bezel has a first bezel segment which surrounds the display panel and extends perpendicular to a display plane in which the display panel is located, a second bezel segment which extends from the first bezel segment towards an inside of the display panel, and a third bezel segment which extends from the second bezel segment towards the inside of the display panel, the second bezel segment and the third bezel segment being on the display side of the display panel, the reflective face abuts against the third bezel segment, and a bezel bending angle between the third bezel segment and the display plane is equal to a light guide member angle between the light entrance face and the reflective face.

19. The display device according to claim 17, wherein the light guide member further comprises an abutment face which is connected between the refractive face and the reflective face and is perpendicular to the light exit face and the light entrance face, two adjacent light guide members abut against each other via the abutment face, The gap comprises a plurality of border frames, each of the border frames surrounds each of the display panels, and the border frame has a first border frame segment that extends around the display panel and in a display plane in which the display panel is located.

20. The display device of any one of claims 17-19, wherein, In the light guide member cross section, the second width of the reflection surface is in a range of L0 / 2 to L0 / 2+0.2 mm, L0 is a width of the gap.

21. The display device of any one of claims 17-19, wherein, The radius of the single circular arc segment is in a range of L0 / 2+0.5 mm to L0 / 2+9 mm, L0 is a width of the gap.

22. A manufacturing method for manufacturing the display device of claim 18, comprising: providing a plurality of display panels, wherein a gap that does not emit light is formed between two adjacent display panels; providing a light guide member; and attaching the light guide member on a display side of the display panel such that the reflection surface abuts against the third border frame segment to position the light guide member relative to the display panel.

23. A manufacturing method for manufacturing the display device of claim 19, comprising: providing a plurality of display panels, wherein a gap that does not emit light is formed between two adjacent display panels; providing a light guide member; and attaching the light guide member on a display side of the display panel such that the abutment surface is aligned with the first border frame segment to position the light guide member relative to the display panel.

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