Light guide plate and display

Abstract

The utility model relates to a light guide plate and a display, which comprise at least one light guide unit, the light guide unit comprises a front view light guide structure and a side view light guide structure, so that the effect that an image watched by a front view angle is different from an image watched by a left view angle and a right view angle is realized, and users of the left view angle and the right view angle do not face a traditional black screen in a peep-proof application scene. And the preset image can be seen. The front-view light guide structures and the side-view light guide structures are arranged and arranged alternately, so that more uniform light distribution is ensured, the brightness and the contrast ratio are remarkably improved, an image is clear and distinguishable at any angle, and energy consumption can be reduced by optimizing the light guide structures. In terms of technical implementation, the side-looking light guide structure is designed according to the principle of total reflection of light, the angle of emergent light is ensured to be accurate and controllable, the light can be transmitted according to a preset path, the specific structure of the light guide structure is simplified, the manufacturing cost is reduced, and more possibilities are provided for practical application.

Description

[Technical field]

[0002] The utility model belongs to the field of display technology, and in particular relates to a light guide plate and a display. [Background technology]

[0004] With the iterative development of optical film technology, some products require the ability to see different images at different angles, which brings new challenges to related display technologies. At present, the industry has mainly proposed two technical solutions to this demand: blocking and displaying different content at different viewing angles. The blocking technology solution mainly uses physical or optical means to limit the viewing angle, and by designing a specific blocking structure or material, only observers within a certain angle range on the front can see the displayed content. For solutions that display different content at different viewing angles, the existing technologies mostly use different voltages to make the observer observe different grayscales at different angles to achieve similar effects.

[0005] When using the occlusion solution, although its implementation is relatively simple and low-cost, this solution has an obvious flaw: the emitted light will be absorbed by the occlusion, resulting in a reduction in the utilization rate of the emitted light. The reduction in light intensity may not only reduce the performance of the device, but also affect the user's visual experience. When using the solution of displaying different images at different viewing angles, different voltages need to be used for regulation to ensure that the grayscale observed by the observer at different angles shows obvious differences. This technical route is difficult to implement, complex in design, and high in production cost.

[0006] Therefore, the technical solution to achieve the ability to see different images at different angles faces many challenges and difficulties in practical applications, and requires comprehensive consideration and optimization in terms of technical implementation, design, production, and user adaptability. [Utility Model Content]

[0008] The purpose of the utility model is to provide a light guide plate that can closely cooperate with the pixel layout of the display screen so that the light sources at different pixel positions can be emitted at unique angles, so that the observer can view different image effects at different angles. The front viewing angle can clearly present the main image of the screen, while the left and right sides can display other auxiliary images.

[0009] The light guide plate of the utility model includes at least one light guide unit, which includes a front view light guide structure and a side view light guide structure. The front view light guide structure and the side view light guide structure have a light incident part and a light output part. The light incident parts of the front view light guide structure and the side view light guide structure are both located on the same side of the light guide plate, and the light output part is located on the other side of the light guide plate. The angle between the light output angle of the front view light guide structure and the surface of the light guide plate is in the range of 60°-90°, and the angle between the light output angle of the side view light guide structure and the surface of the light guide plate is in the range of 20°-60°.

[0010] In one embodiment, the front-view light-guiding structure includes a columnar portion and a hemispherical structure portion above the columnar portion, and the columnar portion and the hemispherical structure portion are formed integrally.

[0011] In one of the embodiments, the side-view light-guiding structure includes a main structure and a light-shielding sheet covering the main structure, the main structure includes an opaque portion, and the shape of the main structure is a first right-angled triangle.

[0012] In one embodiment, the opaque portion is shaped as a second right triangle, a light-transmitting channel is formed between the two hypotenuses of the first right triangle and the second right triangle, and the light-shielding sheet covers the lower half of the hypotenuse of the first right triangle.

[0013] In one embodiment, each light guide unit includes a front view light guide structure and two side view light guide structures, and the two side view light guide structures are symmetrically arranged on both sides of the front view light guide structure.

[0014] In one embodiment, the right-angled side of the side-view light guide structure is arranged on the outside, the front-view light guide structure and the side-view light guide structure are arranged in a long strip shape, and the side-view light guide structures in two adjacent light guide units are connected at the right-angled side.

[0015] In one embodiment, the relationship between the size parameters of the main structure and the opaque portion satisfies the following conditions:

[0016] ,and ;

[0017] Wherein, L is the width of the bottom edge of the light guide structure when viewed from the side, h is the height of the light guide structure when viewed from the side, and x is the width of the bottom edge of the opaque portion.

[0018] The utility model further provides a display, which includes a display layer and the aforementioned light guide plate, wherein the light guide plate is arranged on the display layer, and the side of the light guide plate where the light incident part is located corresponds to the light emitting surface of the display layer, and the display layer has display areas corresponding to the front-view light guide structure and the side-view light guide structure in the light guide plate respectively.

[0019] In one of the embodiments, each display area has an independent RGB display unit, and display areas corresponding to different types of light-guiding microstructures display different contents.

[0020] In one embodiment, the number of display pixels in the display area of ​​the display layer corresponding to the front-view light guide structure is an integer multiple of the number of display pixels of the side-view light guide structure.

[0021] Compared with the prior art, the utility model has the following beneficial effects: the utility model realizes that the image viewed from the front angle is different from the image viewed from the left and right angles by setting a front-view light guide structure and a side-view light guide structure, thereby achieving an anti-peeping effect, and at the same time, the left and right sides can see the preset image instead of the traditional black screen. The front-view light guide structure and the side-view light guide structure alternately optimize the arrangement and layout of the light guide structure, which can achieve more uniform light distribution, higher brightness and contrast, and lower energy consumption. The side-view light guide structure is formed according to the principle of total reflection of light, which ensures the controllability of the angle of the emitted light, simplifies the specific structure of the light guide structure, and reduces the production cost.

Brief Description of the Drawings

[0023] Figure 1 It is a structural schematic diagram of a light guide unit in a light guide plate in one embodiment of the utility model.

[0024] Figure 2 It is a structural schematic diagram of a light guide unit in a light guide plate in another embodiment of the utility model.

[0025] Figure 3 It is a structural schematic diagram of a light guide plate in an embodiment of the utility model.

[0026] Figure 4 It is a schematic diagram of the light path of light passing through the side-view light-guiding structure in the light-guiding unit.

[0027] Figure 5 It is a schematic diagram of the light path of the light passing through the light-guiding structure in the light-guiding unit.

[0028] Figure 6 It is a schematic diagram of the arrangement structure of the front view light guide structure and the side view light guide structure in an embodiment of the utility model.

[0029] Figure 7 It is a structural schematic diagram of a light guide plate in another embodiment of the utility model.

[0030] Figure 8 It is a schematic diagram of the principle of displaying different information at different viewing angles in an embodiment of the present utility model.

[0031] Explanation of reference numerals: 100, front view of light guide structure; 200, side view of light guide structure; 210, light shielding sheet; 220, opaque portion. [Specific implementation method]

[0033] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. It is understandable that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. It should also be noted that, for the convenience of description, only the parts related to the utility model rather than all structures are shown in the accompanying drawings. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0034] The terms "include" and "have" and any variations thereof in the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0035] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] The purpose of the utility model is to achieve a display effect of obtaining different display contents under different viewing angles. The display includes a display layer and a light guide plate. The light guide plate is structurally designed so that it can emit light from the display layer in different directions, so that different display contents can be viewed under different viewing angles. A specific application scenario is to achieve an anti-peeping display effect, so that display information different from that of the front viewing angle can be viewed outside the anti-peeping angle. In addition, it can also be applied in game scenarios to present different contents through different viewing angles in one display.

[0037] The utility model first provides a light guide plate, see Figure 1 , Figure 1It is a structural schematic diagram of a light guide unit in a light guide plate of an embodiment of the utility model. The light guide plate in a preferred embodiment of the utility model is closely matched with the pixel layout of the display screen, so that the light sources at different pixel positions can be emitted at unique angles, so that the observer can view different image effects at different angles. The light guide plate includes at least one light guide unit, and the light guide unit includes a front view light guide structure 100 and a side view light guide structure 200. The front view light guide structure 100 and the side view light guide structure 200 have a light incident part and a light exit part. The light incident parts of the front view light guide structure 100 and the side view light guide structure 200 are both located on the same side of the light guide plate, and the light exit part is located on the other side of the light guide plate. The angle between the light exit angle of the front view light guide structure 100 and the surface of the light guide plate is in the range of 60°-90°, and the angle between the light exit angle of the side view light guide structure 200 and the surface of the light guide plate is in the range of 20°-60°.

[0038] See also Figure 2 , Figure 3 , Figure 2 is a structural schematic diagram of a light guide unit in a light guide plate in another embodiment of the utility model, Figure 3 It is a schematic diagram of the optical path of the light passing through the front-view light guide structure 100 in the light guide unit. In a specific embodiment, each group of optical units is composed of three regions ABC, and each region corresponds to an independent display image signal. Specifically, the side-view light guide structure 200 includes a main structure and a light shielding film 210 covering the main structure, and the main structure includes an opaque portion 220, and the shape of the main structure is a right triangle. That is, the A region and the C region are axisymmetric right triangle structures. Specifically, the shape of the opaque portion 220 is a second right triangle, and a light-transmitting channel is formed between the two hypotenuses of the first right triangle and the second right triangle. In a further preferred embodiment, the first right triangle and the second right triangle have the same vertex angle and base angle, and the two hypotenuses of the first right triangle and the second right triangle are parallel to each other. The light shielding film 210 covers the lower half of the hypotenuse of the right triangle of the main structure, that is, there is a part of the black opaque area in the triangle, and the lower half of the hypotenuse of the triangle is also covered with a black opaque film, thereby forming a light-transmitting channel. The opaque portion 220 is made of a light absorbing material or a reflective layer is formed at the interface to reflect the light without passing through the opaque portion 220 .

[0039] See also Figure 4 , Figure 4It is a schematic diagram of the optical path of the light passing through the side-view light-guiding structure 200 in the light-guiding unit. The optical path of this triangular structure part is shown in the figure, wherein light 1 and light 2 are the boundary rays of the outgoing light. The principle of adjusting the output angle adopted by the side-view light-guiding unit is as follows: According to the principle of total reflection, when the light is emitted from the medium with a high refractive index to the medium with a low refractive index, if the incident angle is greater than the limit angle, there will be no light refraction, and all light passes through in the form of reflection. Specifically, the left-moving light entering area A will be within the angle range between light 1 and light 2 after passing through the triangular structure light-transmitting channel. The right-moving light entering area A can be divided into two cases, wherein the light with an incident angle greater than the total reflection angle is totally reflected (light 3), and the light with an incident angle less than the total reflection angle is absorbed by the black opaque sheet (light 4). Since area C is axially symmetrical with area A, the optical path is also symmetrical with area A.

[0040] See also Figure 5 , Figure 5 It is a schematic diagram of the optical path of the light passing through the front-view light guide structure 100 in the light guide unit. Specifically, the front-view light guide structure 100 includes a columnar part and a hemispherical structure part above the columnar part, and the columnar part and the hemispherical structure part are formed integrally. That is, the B area is composed of a columnar structure and a top hemispherical structure, and its optical path is shown in the figure. Since the material is a high-refractive-index material, a part of the incident light of all angles after entering the structure directly enters the top hemispherical area, and the rest will not be transmitted from the columnar area of ​​the structure, that is, the side, because the incident angle is greater than the total reflection angle, and can only be fully reflected to the top hemispherical area. Finally, all the light is converged by the top hemispherical structure to a certain extent, so that it is limited to a certain angle, and the angle q between the light 5 and it.

[0041] Please read further Figure 2 , Figure 2 It is a structural schematic diagram of a light guide unit in a light guide plate of another embodiment of the utility model. Specifically, each light guide unit includes a front view light guide structure 100 and two side view light guide structures 200, and the two side view light guide structures 200 are symmetrically arranged on both sides of the front view light guide structure 100. This solution provides multi-angle image display, so that users can get a clear visual experience no matter from which angle they watch; secondly, the symmetrical design of the side view light guide structure 200 ensures the balance of the viewing angles on both sides, so that the images on both sides are highly consistent in brightness and color. Figure 2 What is shown in the figure is a cross section in one direction, and the angle of the emitted light is limited in the cross section direction. Related structures can also be arranged simultaneously in a direction perpendicular thereto to form a matrix arrangement.

[0042] See Further Reading Figure 1 , Figure 2The product is composed of alternating microstructures of the side-viewing area and the front-viewing area. The side-viewing area is composed of a black opaque area, a translucent area and a black opaque sheet, and forms a light penetration channel. The front-viewing area is composed of a columnar structure and a hemispherical structure. The side-viewing area cleverly integrates the black opaque area, the translucent area and the black opaque sheet. The three work together to build an efficient light penetration channel, ensuring the clarity and contrast of the image at the side-viewing angle, while also effectively preventing the light from scattering in unnecessary directions, thereby enhancing the anti-peeping or display effect. The front-viewing area is composed of a columnar structure and a hemispherical structure. This combination design makes the image at the front-viewing angle brighter and clearer. The columnar structure is responsible for guiding the light to ensure that the light can be evenly transmitted. Through such a setting, this product not only meets the needs of multi-angle display, but also takes into account the optimization of anti-peeping and visual effects. Whether from a side view or a front view angle, users can obtain clear and bright images, and the image content seen at different angles is also different, which greatly enhances the practicality and fun of the product.

[0043] Furthermore, for the stability of the light guide plate structure and to further prevent light leakage, the space between the light shielding film 210 and the front-view light guide structure 100 can be filled with the same material as the light shielding film, which can not only serve as the light shielding film 210 to prevent light from emitting from this area, but also fix the front-view light guide structure 100 and the side-view light guide structure 200 together, thereby improving the stability of the light guide plate structure, simplifying the method of manufacturing the light guide plate, and reducing the cost of manufacturing the structure.

[0044] See also Figure 6 , Figure 6 It is a schematic diagram of the arrangement structure of the front-view light-guiding structure 100 and the side-view light-guiding structure 200 in an embodiment of the utility model. In a further embodiment, the right-angled side of the side-view light-guiding structure 200 is set on the outside, and the front-view light-guiding structure 100 and the side-view light-guiding structure 200 are arranged in a long strip shape, and the side-view light-guiding structures 200 in two adjacent light-guiding units are connected at the right-angled side. Such a layout not only makes the side-view light-guiding structure 200 more prominent and easy to identify, but also enhances the light guiding effect at the side-view angle. At the same time, the front-view light-guiding structure 100 and the side-view light-guiding structure 200 are both arranged in a long strip shape. This arrangement method can make the overall structure more compact and beautiful. The side-view light-guiding structures 200 in two adjacent light-guiding units are connected at the right-angled side. This design not only simplifies the manufacturing process of the light-guiding structure and improves production efficiency, but also enhances the overall structural stability of the light guide plate. The side-view light guide structures 200 connected at the right angles can work together better to guide the light, making the image clearer and brighter at the side-view angle. Through such a setting, the product can achieve multi-angle display while also optimizing the display effect at the side-view angle and the stability of the overall structure.

[0045] Please read further Figure 3 , Figure 3 This is a schematic diagram of the structure of a light guide plate in an embodiment of the present invention, wherein the width of the anti-peeping area is one unit, and one unit contains at least one set of RGB units, or more than two RGB units. The unit length is represented by L, and the anti-peeping area can be divided into a left side and a right side, each of which occupies 1 / 2 of a unit. The width of the front view area is also one unit, and the top of the front view area is a hemispherical structure with a radius r, and the radius r is equal to 1 / 2 of the width of the front view area, so the diameter is one unit. Other parameters are as follows, wherein h is the height of the anti-peeping area structure, h 0 is the height of the black opaque area, h 1 is the height of the columnar structure in the front view area, x is the width of the black opaque area, and x 0 is the width covered by the black opaque sheet. The relationship between these parameters is expressed by the following formula:

[0046] Specifically, the relationship between the size parameters of the main structure and the opaque portion 220 satisfies the following conditions:

[0047] ,and ;

[0048] ;

[0049] , ;

[0050] In addition, in order to increase the light transmittance of the structure, the width of the normal viewing area can be increased.

[0051] See also Figure 7 , Figure 7 This is a schematic diagram of the structure of a light guide plate in another embodiment of the utility model. In this embodiment, the width of the side view area is one unit, the width of the front view area is two units, and the diameter of the top hemispherical structure of the front view area is two units. The relationship between other parameters is as follows:

[0052] ,and ;

[0053] ;

[0054] , .

[0055] When the area ratio of the front view area to the side view area is 1:1, the viewing experience from the front and side perspectives is balanced, and users at different angles can get a clear and comfortable visual experience, which helps to improve the overall visual effect of the product and enable it to perform well in different scenarios. When the area ratio of the front view area to the side view area is 2:1, the product places more emphasis on the viewing experience from the front perspective. The area of ​​the front view area is larger, and it can present richer and more delicate image details. For scenes that need to highlight the front content, this ratio setting can bring better visual effects. At the same time, although the area of ​​the side view area is relatively small, it can still maintain sufficient clarity and brightness to meet the different needs of users, such as anti-peeping from the side perspective.

[0056] The utility model further provides a display, which includes a display layer and the aforementioned light guide plate, see Figure 8 , Figure 8 This is a schematic diagram of the principle of displaying different information at different viewing angles of an embodiment of the utility model. The light guide plate is arranged on the display layer. The side of the light guide plate where the light incident portion is located corresponds to the light emitting surface of the display layer. The display layer has display areas corresponding to the front view light guide structure 100 and the side view light guide structure 200 in the light guide plate. Here, the meaning of corresponding to the light guide plate is that the size and position of the area where the display layer emits light are the same as the incident area of ​​the light guide structure and the position is consistent.

[0057] The microstructure design must be coordinated with the display pixel layout. A single set of display microstructures includes three areas: A, B, and C. Area A corresponds to the left viewing angle, area B corresponds to the front viewing angle, and area C corresponds to the right viewing angle. The ratio of A:B:C pixels is 1:2:1. The smallest unit of display pixels is a set of RGB. Please refer to Figure 8 , showing the difference between images seen from different viewing angles. When the observer is in the front, he can see the color blocks displayed in area B. When the observer is on the left, he can only see the color blocks displayed in area A. When the observer is on the right, he can only see the color blocks displayed in area C.

[0058] Specifically, each display area has an independent RGB display unit, and the display areas corresponding to different types of light-guiding microstructures display different contents. Each display area is equipped with an independent RGB display unit to ensure rich and delicate colors. According to the different types of light-guiding microstructures in the light guide plate, the corresponding display area can present completely different contents. The display area corresponding to the front-view light-guiding structure 100 is mainly used to present main information or images. Its RGB display units work together to ensure accurate colors and moderate brightness, bringing users a clear and comfortable front viewing effect. The display area corresponding to the side-view light-guiding structure 200 is optimized for the side viewing angle. Through a specific light-guiding microstructure, side viewers can see different content from the front, such as auxiliary information, prompt information, etc. This partitioned display design ensures the display effect of the front and side. In addition, the independent RGB display unit design of each display area also makes the display more flexible and accurate in color management and adjustment. By adjusting the RGB units in different display areas, richer color performance and more delicate images can be achieved.

[0059] Specifically, the number of display pixels in the display area corresponding to the front-view light guide structure 100 in the display layer is an integer multiple of the number of display pixels in the side-view light guide structure 200. The front-view light guide structure 100 is the main viewing area of ​​the display, and its corresponding number of display pixels is relatively large. When viewing from the front, the user can enjoy a better image effect. In order to match the design of the display panel pixels, the number of pixels covered by the front-view area in the utility model must be an integer multiple of the number of pixels covered by the anti-peep area, and the microstructures of the A, B, and C areas are strip structures extending linearly in a single direction.

[0060] Two specific application scenarios are introduced below.

[0061] Application scenario 1

[0062] The display of the utility model can be used in anti-peeping application scenarios. The light guide plate has built-in front-view light guide structure and side-view light guide structure, which are responsible for guiding light from the front and side respectively. The front-view light guide structure ensures that the front viewer can clearly see the main content, while the side-view light guide structure allows the side viewer to only see content that is different from the main viewing angle, such as blurred images, warning information, or a completely black screen. The display area corresponding to the front-view light guide structure displays the main information, such as document content, video images, etc.; while the display area corresponding to the side-view light guide structure displays content that is different from the main viewing angle, which can be a text prompt or a blurred pattern. The front-view light guide structure can choose a corresponding display area with a pixel number that is an integer multiple of the pixel number of the side-view light guide structure display area, ensuring that the image viewed from the front is clear, while the content viewed from the side is blurry or simple, thereby achieving an anti-peeping effect.

[0063] Due to the existence of the side-viewing light guide structure, the side viewer can only see content different from the main view, which effectively prevents information leakage and protects the user's privacy. The front-viewing light guide structure ensures that the front viewer can obtain clear, high-quality images without affecting the normal user experience. This anti-peeping display is suitable for a variety of scenarios, such as offices, conference rooms, public transportation, etc., and can effectively protect the privacy and security of users.

[0064] Application scenario 2

[0065] The display of the utility model can be applied in game display scenarios. In multiplayer game scenarios, different images can be displayed in one display, thereby meeting the needs of displaying different pictures in multiplayer games. The front view light guide structure and the side view light guide structure in the light guide plate correspond to different display areas in the display layer respectively. Each player can select the corresponding display area according to his or her own viewing angle to see his or her own game screen. In multiplayer games, the game content is partitioned and displayed in different areas of the display. The front view light guide structure area facing each player will display his or her personal game screen, while the game screens of other players are displayed through the side view light guide structure area, ensuring that each player can only see his or her own game content. On one display, multiple players can play games at the same time, each seeing different pictures without interfering with each other. This design saves space and enhances the interactivity and fun of the game. This display is not only suitable for multiplayer online games, but can also be applied to offline party games, e-sports competitions and other scenarios, bringing a new gaming experience to players.

[0066] The utility model embodies the technical effect of the utility model by comparing the limiting angles and transmittances between different embodiments. The specific application scenario is selected as an anti-peeping application scenario, the opaque part is selected as a black opaque area, and the shading sheet is selected as a black opaque sheet.

[0067] In Example 1, taking a common single group of RGB pixel width 24um display panel on the market as an example, the width of the anti-peeping area is 24μm, the width of the front view area is 24μm, the diameter of the spherical hemisphere structure in the front view area is 24μm, the height h of the anti-peeping area structure is 14μm, and the height h of the black opaque area is 0 The height h of the columnar structure in the front view area is 10 μm. 1 The width x of the black opaque area is 12 μm, the width x of the black opaque sheet is 8 μm, and the width x of the black opaque sheet is 12 μm. 0 is 4μm.

[0068] In Example 2, the width of the privacy protection area is 24 μm, the width of the front view area is 24 μm, the diameter of the spherical hemispherical structure in the front view area is 24 μm, the height h of the privacy protection area structure is 15 μm, and the height h of the black opaque area is 0The height of the columnar structure in the front view area is h 1 The width x of the black opaque area is 18 μm, the width x of the black opaque sheet is 10 μm, and the width x of the black opaque sheet is 0 is 2μm.

[0069] In Example 3, the width of the privacy protection area is 24 μm, the width of the front view area is 48 μm, the diameter of the spherical hemispherical structure in the front view area is 48 μm, the height h of the privacy protection area structure is 16 μm, and the height h of the black opaque area is 0 The height of the columnar structure in the front view area is h 1 The width x of the black opaque area is 12 μm, the width x of the black opaque sheet is 9 μm, and the width x of the black opaque sheet is 0 3μm.

[0070] In Example 4, the width of the privacy protection area is 24 μm, the width of the front view area is 48 μm, the diameter of the spherical hemispherical structure in the front view area is 48 μm, the height h of the privacy protection area structure is 16 μm, and the height h of the black opaque area is 0 The height of the columnar structure in the front view area is h 1 The width x of the black opaque area is 16 μm, the width x of the black opaque sheet is 9 μm, and the width x of the black opaque sheet is 0 is 3μm.

[0071] Table 1, Effect

[0072]

[0073] The above implementation comparison case results show that the higher the columnar structure in the front view area of ​​this solution is, the more light is focused within a certain range through total reflection, thereby making the transmittance in the front view direction higher. By comparing Example 1 with Example 2, it can be seen that if the height h of the anti-peeping area structure is less than , there will be a black area without an image between the formal area and the anti-peeping area. The range of this black area is related to the extreme viewing angles of the front-view area and the anti-peeping area. At the same time, since the width of the front-view area is increased in Example 3 and Example 4, the transmittance of the formal area is also significantly improved. In addition, by comparing Example 1 with Example 2, it can be seen that the height h of the black opaque area in the anti-peeping area of ​​this solution is 0 The higher the height, the smaller the maximum angle at which the image can be observed in the side view direction. From the comparison between Example 1 and Example 2, it can be seen that the wider the width x of the black opaque area, the lower the transmittance in the side view direction. From the comparison between Example 3 and Example 4, it can be seen that the height h of the black opaque area is 0 The higher it is, the lower the transmittance in the side viewing direction.

[0074] As can be seen from the foregoing, the utility model is designed with a front-view light-guiding structure and a side-view light-guiding structure. The image viewed from the front angle is different from the image viewed from the left and right angles. Users from the left and right angles are no longer faced with a traditional black screen, but can see a preset image, which greatly enriches the application scenarios of the relevant display screens and can improve the user experience in anti-peeping application scenarios. The arrangement and layout of the front-view light-guiding structure and the side-view light-guiding structure are arranged in an alternating manner. The alternating design not only ensures a more uniform light distribution, but also significantly improves the brightness and contrast, so that the image is clearly discernible at any angle. By optimizing the light-guiding structure, energy consumption can also be reduced. In terms of technical implementation, the side-view light-guiding structure is designed according to the principle of total reflection of light, ensuring that the angle of the emitted light is precisely controllable, so that the light can propagate along a preset path. This not only simplifies the specific structure of the light-guiding structure, but also greatly reduces the production cost, providing more possibilities for practical applications.

[0075] In summary, the utility model not only achieves an excellent anti-peeping effect by setting up the front view light guide structure and the side view light guide structure, but also brings a new visual experience to the user. At the same time, by optimizing the arrangement and layout of the light guide structure, we further improve the display performance and reduce energy consumption. The application of this technology can enrich the user's visual experience on the basis of improving information security and privacy protection.

[0076] The above is only a specific implementation of the present invention, and any improvements made based on the concept of the present invention are deemed to be within the protection scope of the present invention.

Claims

1. A light guide plate, characterized in that: The invention comprises at least one light guide unit, wherein the light guide unit comprises a front view light guide structure (100) and a side view light guide structure (200), wherein the front view light guide structure (100) and the side view light guide structure (200) have a light incident portion and a light exit portion, wherein the light incident portions of the front view light guide structure (100) and the side view light guide structure (200) are both located on the same side of the light guide plate, and the light exit portion is located on the other side of the light guide plate, and the light exit angle of the front view light guide structure (100) and the surface of the light guide plate are within a range of 60°-90°, and the light exit angle of the side view light guide structure (200) and the surface of the light guide plate are within a range of 20°-60°.

2. The light guide plate according to claim 1, characterized in that: The front-view light-guiding structure (100) comprises a column part and a hemispherical structure part above the column part, and the column part and the hemispherical structure part are formed integrally.

3. The light guide plate according to claim 1, characterized in that: The side-view light guide structure (200) comprises a main body structure and a light shielding sheet (210) covering the main body structure, the main body structure comprises a light-proof portion (220), and the shape of the main body structure is a first right-angled triangle.

4. The light guide plate according to claim 3, characterized in that: The shape of the opaque portion (220) is a second right triangle, a light-transmitting channel is formed between the two hypotenuses of the first right triangle and the second right triangle, and the light-shielding sheet (210) covers the lower half of the hypotenuse of the first right triangle.

5. The light guide plate according to claim 3, characterized in that: Each of the light guide units comprises a front view light guide structure (100) and two side view light guide structures (200), and the two side view light guide structures (200) are symmetrically arranged on both sides of the front view light guide structure (100).

6. The light guide plate according to claim 5, characterized in that: The right-angled side of the side-view light guide structure (200) is arranged on the outside, the front-view light guide structure (100) and the side-view light guide structure (200) are arranged in a long strip shape, and the side-view light guide structures (200) in two adjacent light guide units are connected at the right-angled side.

7. The light guide plate according to claim 4, characterized in that: The relationship between the size parameters of the main structure and the opaque portion (220) satisfies the following condition: and Wherein, L is the width of the bottom edge of the side-view light guide structure (200), h is the height of the side-view light guide structure (200), and x is the width of the bottom edge of the opaque portion (220).

8. A display comprising a display layer and the light guide plate according to any one of claims 1 to 7, characterized in that: The light guide plate is arranged on the display layer, the side of the light guide plate where the light incident portion is located corresponds to the light emitting surface of the display layer, and the display layer has display areas corresponding to the front view light guide structure (100) and the side view light guide structure (200) in the light guide plate respectively.

9. The display according to claim 8, characterized in that Each display area has an independent RGB display unit, and display areas corresponding to different types of light-guiding microstructures display different contents.

10. The display according to claim 8, characterized in that The number of display pixels in the display area of ​​the display layer corresponding to the front-view light guide structure (100) is an integer multiple of the number of display pixels of the side-view light guide structure (200).

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