Spliced reflective display

Abstract

The invention provides a spliced reflective display, which comprises a plurality of display devices, a front light guide plate and at least one light source. In the multiple display devices, one display device can be spliced with another display device through the side edge to form an adjacent splicing position, the front light guide plate is attached to the upper portions of the multiple display devices and is adjacent to the display side, the front light guide plate is provided with an upper surface adjacent to the display side, and the front light guide plate is provided with an optical structure. The at least one light source is arranged on the side portion of the front light guide plate, after light rays of the at least one light source are reflected to the multiple display devices from the upper surface of the front light guide plate, development light rays are reflected from the multiple display devices, the development light rays are emitted towards the display side to display pictures, and the optical structure can guide the light ray path of the development light rays. Therefore, the adjacent spliced images on the display side are shielded.

Description

Technical Field

[0001] The present invention relates to the technical field of a spliced ​​reflective display, and in particular to a reflective display capable of forming an integrated visual experience. Background Art

[0002] The current large-scale outdoor posters have almost been replaced by electronic billboards because they have the advantage of being able to switch images directly without having to remake or disassemble the posters. This not only reduces costs, but also brings huge benefits to advertising marketing.

[0003] Conventional electronic billboards such as liquid crystal displays (LCD) and organic light-emitting diodes (OLED) have low brightness and are not convenient for outdoor use. LCDs also have problems such as high energy consumption, high heat consumption, and high cost. Therefore, electronic paper (E-paper) is currently one of the most suitable choices for outdoor billboards. E-paper has the characteristics of high reflectivity and energy saving with almost no power consumption, which perfectly meets the needs of outdoor electronic billboards.

[0004] In the E-paper technology, cholesteric liquid crystal display (ChLCD) has higher color saturation and reflectivity than electronic ink, that is, ChLCD has a better display effect for users.

[0005] However, it is difficult to produce large-sized ChLCD products with current technology, and it is also limited by the size and shape that panel manufacturers can produce. Therefore, large-scale ChLCD is difficult to drive, expensive, and has low yields. Therefore, spliced ​​components are produced.

[0006] In response to the splicing needs of display devices, the industry has many types of splicing components, but these splicing components or optical components such as light guides or fiber optic arrays are all designed for the situation where the display itself has a backlight source, such as LCD or OLED.

[0007] In the prior art patent number CN203760020U, a seamless LCD splicing display screen is disclosed, which is intended to eliminate the frame structure existing in multiple display devices when multiple display devices are spliced ​​together, so that the picture viewed by the user looks like a whole picture, wherein the display image at the edge of the LCD screen is imaged through the imaging material on the side of the triangular prism-shaped light guide strip, thereby extending the image so that the display images on both sides of the non-display area can be visually spliced ​​together. However, when mapping is performed only through the light guide strip, the light guide strip may cause the display screen to leak light, so it is necessary to further optimize the light guide strip.

[0008] In addition, some splicing components are externally connected to the outside of the display, but generally, in addition to the front light guide plate (Front Light Guide Plate), the top of the display device may also be provided with a touch panel and protective glass and other structures, so it has a considerable thickness. If the splicing components are placed on top of the protective glass, the coupling efficiency will be too poor and the viewing angle will be too narrow due to the long distance. Therefore, even if the splicing components are placed, an obvious brightness difference in the splicing area will still be seen, that is, placing the splicing components on the outermost side of the display device will make the splicing components farther away from the display device, resulting in an increase in the overall thickness and a worse display effect.

[0009] Therefore, in order to utilize the existing ChLCD for assembly and splicing, eliminate the frame structure, and retain the advantages of ChLCD, it is necessary to develop an ideal technical method to solve the above problems in order to manufacture solutions for large display billboards. Summary of the invention

[0010] The object of the present invention is to provide a spliced ​​reflective display, which can eliminate the border when splicing the displays, so that the images displayed by the spliced ​​displays can be spliced ​​together in a seamless manner visually.

[0011] The invention relates to a spliced ​​reflective display, which includes a plurality of display devices, a front light guide plate, and at least one light source.

[0012] Among the multiple display devices, a display device is spliced ​​with a side edge of another display device, so that the spliced ​​sides become an adjacent splicing point.

[0013] The front light guide plate is attached above the multiple display devices and adjacent to a display side. The front light guide plate has an upper surface adjacent to the display side. The front light guide plate also has an optical structure. The material of the front light guide plate can be selected from polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), and glass. These materials have different characteristics. For example, PC and PMMA have high transparency and excellent optical properties, while PET is strong and easy to process, and glass provides the best transparency and scratch resistance.

[0014] The at least one light source is arranged on the side of the front light guide plate, and the at least one light source generates light that enters the front light guide plate. The at least one light source is selected from the light source group consisting of a light-emitting diode (LED) light strip and a cold cathode fluorescent lamp (CCFL) lamp tube.

[0015] Among them, the front light guide plate can be adhered to the top of the multiple display devices by using glue, and the glue is selected from the group consisting of an OCA (Optical Clear Adhesive) glue and a liquid optical glue (Optical Clear Resin; OCR). After the light of the at least one light source is reflected from the upper surface of the front light guide plate to the multiple display devices, it is continuously reflected from the multiple display devices to emit imaging light, and the imaging light is emitted toward the display side to display the picture, wherein the optical structure guides the light path of the imaging light to shield the adjacent spliced ​​images on the display side.

[0016] In the reflective display, the display device among the multiple display devices is a cholesterol liquid crystal display, and the reflective display is a large flexible billboard, which is suitable for construction on the outer body of a bus, the wall of an outdoor building, or a large electronic billboard in a shopping mall.

[0017] In a reflective display, the display device is a flexible structure, and the front light guide plate is also a flexible structure corresponding to the display device.

[0018] In one of the preferred embodiments, in the reflective display, the front light guide plate further has a plurality of optical microstructures, which receive the light from the at least one light source and reflect it uniformly to the plurality of display devices.

[0019] Next, the optical microstructure is concave toward the front light guide plate, and has a first inclined surface and a second inclined surface, the angle between the first inclined surface and the plane is a first angle, the angle between the second inclined surface and the plane is a second angle, the first angle ranges from 3 degrees to 60 degrees, and the second angle ranges from 60 degrees to 100 degrees, wherein the first angle is toward the at least one light source.

[0020] In a reflective display, the optical structure corresponding to the multiple display devices is a plurality of concave lens structures, and the concave lens structures have a uniform magnification of less than 1.1 times, and the magnification at the edge is generally 20% to 40%. In practice, a magnification of 5% is the best because the overall uniform magnification has no deformation and achieves a shielding effect.

[0021] In one of the preferred embodiments, the front light guide plate and the optical structure are integrated.

[0022] In one of the preferred embodiments, the front light guide plate and the optical structure are independent structures.

[0023] In one of the preferred embodiments, the optical structure is in a straight line shape when viewed from a top view from the display side above the reflective display.

[0024] In one of the preferred embodiments, when viewed from a top view from the display side above the reflective display, the optical structure is a cross shape.

[0025] Therefore, by utilizing the spliced ​​reflective display provided by the present invention, the cost can be reduced to achieve a giant reflective display effect in a splicing manner, and the images close to the frames of the multiple display devices can be mapped and enlarged through the front light guide plate, so that the images displayed by the multiple display devices can be visually spliced ​​together in a seamless manner, that is, a visually integrated picture.

[0026] Other features and beneficial effects of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other beneficial effects of the present invention can be achieved and obtained by the structures specifically pointed out in the description, claims, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The positional relationships described in the drawings in the following description are based on the directions in which the components are drawn in the diagrams, unless otherwise specified.

[0028] Figure 1 is a schematic diagram of a first embodiment of a reflective display according to the present invention;

[0029] Figure 2 is a schematic diagram of a second embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of the first inclined surface and the second inclined surface of the present invention;

[0031] Figure 4 is a schematic diagram of a third embodiment of the present invention;

[0032] Figure 5 is a schematic diagram of a fourth embodiment of the present invention;

[0033] Figure 6 is a schematic diagram of a fifth embodiment of the present invention; and

[0034] Figure 7 is a schematic diagram of the sixth embodiment of the present invention.

[0035] Reference numerals:

[0036] 1: Reflective display

[0037] 10: Display Device

[0038] 12: Adjacent joints

[0039] 20: Front light guide plate

[0040] 22: Upper surface

[0041] 24: Optical structure

[0042] 26: Optical microstructures

[0043] 36: First slope

[0044] 38: Second slope

[0045] 40: Light Source

[0046] θ1: first angle

[0047] θ2: Second angle DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0049] In the description of the present invention, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof all mean "at least including".

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] The object of the present invention is to provide a spliced ​​reflective display, which can eliminate the border when splicing the displays, so that the images displayed by the spliced ​​displays can be spliced ​​together in a seamless manner visually.

[0052] See also Figure 1 , Figure 1 1 is a schematic diagram of a first embodiment of a reflective display of the present invention. The present invention relates to a spliced ​​reflective display 1 , which includes a plurality of display devices 10 , a front light guide plate 20 , and at least one light source 40 .

[0053] Among the plurality of display devices 10 , a display device 10 is spliced ​​with a side edge of another display device 10 , so that the spliced ​​sides become an adjacent splicing portion 12 .

[0054] The front light guide plate 20 is attached above the plurality of display devices 10 and adjacent to a display side. The front light guide plate 20 has an upper surface 22 adjacent to the display side. The front light guide plate 20 also has an optical structure 24 .

[0055] The at least one light source 40 is disposed on a side of the front light guide plate 20 , and the at least one light source 40 generates light that enters the front light guide plate 20 .

[0056] Among them, after the light from the at least one light source 40 is reflected from the upper surface 22 of the front light guide plate 20 to the multiple display devices 10, it is continuously reflected from the multiple display devices 10 to produce imaging light, and the imaging light is emitted toward the display side to display the picture, wherein the optical structure 24 guides the light path of the imaging light to shield the imaging of the adjacent joint 12 on the display side.

[0057] As shown in the figure, the reflective display 1 has the two display devices 10, and the front light guide plate 20 is set on the two display devices 10, and can be bonded together by two optical adhesives, OCA or OCR. The front light guide plate 20 is provided with an optical structure 24 protruding outward and a plurality of optical microstructures 26. The optical microstructure 26 can change the path of the reflected light so that the light will be evenly reflected to the multiple display devices 10, and the optical structure 24 can enlarge the projection position of the adjacent splicing point 12 on the reflective display 1. After the projection position is imaged onto the surface of the front light guide plate 20 through the enlarged image, through the optical structure 24, the user will visually feel that the image of the reflective display 1 is spliced ​​together, such as integrally formed.

[0058] The optical microstructure 26 is made by laser dotting, so the structure is mostly semicircular concave holes. The reflection direction of the optical microstructure 26 is less consistent, which is more suitable for electronic ink electronic paper.

[0059] See also Figure 2 And with Figure 3 , Figure 2 is a schematic diagram of a second embodiment of the present invention, Figure 33 is a schematic diagram of the first inclined plane 36 and the second inclined plane 38 of the present invention. In the reflective display 1, the display device 10 of the plurality of display devices 10 may be a cholesterol liquid crystal display, and the display device 10 may be a flexible structure, and the front light guide plate 20 may also be a flexible structure corresponding to the display device 10, so that on the surface of a large object, such as a bus body or a building exterior, it can achieve the advantages of being large and easy to set up.

[0060] The second embodiment is like the first embodiment, the reflective display 1 has the two display devices 10, the front light guide plate 20 is set on the two display devices 10, and can be bonded together by two optical adhesives of OCA or OCR, and the front light guide plate 20 is provided with an optical structure 24 protruding outward and the optical microstructure 26, the optical microstructure 26 is concave toward the front light guide plate 20, and has a first inclined surface 36 and a second inclined surface 38, the first inclined surface 36 and the plane have an angle of a first angle θ1, the second inclined surface 38 and the plane have an angle of a second angle θ2, the first angle θ1 has an angle range of 3 degrees to 60 degrees, and the second angle θ2 has an angle range of 60 degrees to 100 degrees, wherein the first angle θ1 is toward the at least one light source 40.

[0061] The optical microstructure 26 is an optical structure 24 designed for cholesterol liquid crystal, and can be manufactured into a pyramidal shape by yellow light processing or ultra-precision machining, so that the light source 40 can obtain a more consistent reflection angle in the front light guide plate 20, so that the reflective display effect is better.

[0062] The industry generally considers the production cost of the components themselves, usually making the light guide plate into a thin strip, and only magnifying the image near the border area. In this way, the splicing components must be made very thick to achieve their visual effects. For example, the thickness of the splicing components of an LCD with a double-sided border of 5 to 6.7 mm will reach 8 to 12 mm. However, due to the thicker thickness, it is easy to cause the problem of narrow field of view and brightness attenuation due to the attenuation of light guide intensity and the depth of field limitation of the viewer. In addition, because the magnification of the image in the splicing area of ​​a general long strip splicing component is about 20% to 40%, the brightness will at least be attenuated by this ratio, resulting in a significant decrease in the brightness of the splicing area.

[0063] But see Figure 4 , Figure 42 is a schematic diagram of the third embodiment of the present invention. The front light guide plate 20 and the optical structure 24 are designed as an integrated whole. The front light guide plate 20 is provided on the reflective display 1. The optical microstructure 26 in the form of a hole is provided in the front light guide plate 20. The optical structure 24 on the front light guide plate 20 is designed to be a lens-like shape such as a concave lens. The projection position is magnified and imaged on the surface of the optical structure 24, thereby shielding the adjacent splicing portion 12, and achieving a seamless splicing effect. In this way, the entire screen can be proportionally magnified by about 5%, and the impact on brightness is much less than that of the conventional technology. Moreover, since the entire screen is proportionally magnified, it is more difficult for the human eye to distinguish the difference. In other words, in the reflective display 1, the optical structure 24 corresponds to the plurality of display devices 10 and is a plurality of concave lens structures. The concave lens structures are uniformly magnified to less than 1.1 times, and the magnification at the edge is generally 20% to 40%. In practice, the magnification of 5% is the best, because the overall uniform magnification has no deformation and can achieve a shielding effect.

[0064] Continue, see Figure 5 , Figure 5 2 is a schematic diagram of the fourth embodiment of the present invention. In addition to being integrally formed, the front light guide plate 20 and the optical structure 24 can also be combined by gluing, that is, the front light guide plate 20 and the optical structure 24 are independent structures. For example, the front light guide plate 20 with the optical microstructure 26 below the dotted line can be pre-made, and then the optical structure 24 that expands to the entire display area above can be glued to form a glued front light guide plate 20.

[0065] See also Figure 6 , Figure 6 is a schematic diagram of the fifth embodiment of the present invention. In one of the preferred embodiments, the two display devices 10 have a front light guide plate 20, and the front light guide plate 20 has a light source 40 on both sides according to the display range of the reflective display 1. When viewed from the display side above the reflective display 1, the optical structure 24 is in a straight line shape, and the side of the front light guide plate 20 can also be glued with an optical adhesive, such as splicing and gluing the two front light guide plates 20 together using two optical adhesives, such as OCA or OCR.

[0066] Continue, see Figure 7 , Figure 7is a schematic diagram of the sixth embodiment of the present invention. The front light guide plate 20 has the optical structure 24 at any position, and the at least one light source 40 such as a light bar can be set on at least one side. In one preferred embodiment, the four display devices 10 have one front light guide plate 20, and each of the four sides of the four display devices 10 has one light source 40. If the display side above the reflective display 1 is viewed from a top view, the optical structure 24 is a cross shape, so that the display effect of the display can be better ensured.

[0067] In addition, the reflective display 1 may also consider the size of the front light guide plate 20 to determine whether to dispose a single or multiple light sources 40 on one side, two sides, three sides, or four sides.

[0068] In summary, by utilizing the spliced ​​reflective display 1 provided by the present invention, the cost can be reduced to achieve a giant reflective display 1 display effect in a splicing manner, and the images close to the frame of the multiple display devices 10 can be mapped and enlarged through the front light guide plate 20, so that the images displayed by the multiple display devices 10 can be visually spliced ​​together in a seamless manner, that is, a visually integrated picture.

[0069] In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention can be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background technology at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation on the claim.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements 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 spliced ​​reflective display, characterized in that: The reflective display comprises: A plurality of display devices, wherein a side edge of one display device is spliced ​​with a side edge of another display device, so that the spliced ​​sides become an adjacent splicing portion; a front light guide plate, attached above the plurality of display devices and adjacent to a display side, the front light guide plate having an upper surface adjacent to the display side, and the front light guide plate having an optical structure; and At least one light source is disposed on the side of the front light guide plate, and the at least one light source generates light that enters the front light guide plate; Among them, after the light from at least one light source is reflected from the upper surface of the front light guide plate to the multiple display devices, it is continuously reflected from the multiple display devices to produce imaging light, and the imaging light is emitted toward the display side to display the picture, wherein the optical structure guides the light path of the imaging light to shield the adjacent spliced ​​images on the display side.

2. The reflective display according to claim 1, characterized in that: The display device among the plurality of display devices is a cholesteric liquid crystal display.

3. The reflective display according to claim 2, characterized in that: The display device is a flexible structure, and the front light guide plate is also a flexible structure corresponding to the display device.

4. The reflective display according to claim 1, wherein: The front light guide plate further has a plurality of optical microstructures, which receive the light from the at least one light source and reflect it uniformly to the plurality of display devices.

5. The reflective display according to claim 4, characterized in that: The optical microstructure is concave toward the front light guide plate, and has a first inclined surface and a second inclined surface. The angle between the first inclined surface and the plane is a first angle, and the angle between the second inclined surface and the plane is a second angle. The first angle ranges from 3 degrees to 60 degrees, and the second angle ranges from 60 degrees to 100 degrees, wherein the first angle is toward the at least one light source.

6. The reflective display according to claim 1, characterized in that: The optical structure corresponding to the multiple display devices is a plurality of concave lens structures, and the concave lens structures are uniformly magnified to less than 1.1 times.

7. The reflective display according to claim 1, characterized in that: The front light guide plate and the optical structure are integrated.

8. The reflective display according to claim 1, characterized in that: The front light guide plate and the optical structure are independent structures.

9. The reflective display according to claim 1, characterized in that: When viewed from the display side above the reflective display in a top-down perspective, the optical structure is in a straight line shape.

10. The reflective display according to claim 1, characterized in that: When the display side above the reflective display is viewed from a top-down perspective, the optical structure is a cross shape.

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