3D naked-eye optical film and display device

Abstract

The utility model discloses a 3D naked-eye optical film which is suitable for being attached to a display panel, the display panel is provided with a plurality of sub-pixels, the sub-pixels are arranged in the first direction and the second direction to form a matrix, and the sub-pixels emit light towards the 3D naked-eye optical film. The 3D naked-eye optical film comprises a base part and a plurality of protruding structures, and the protruding structures are located on the base part. The projection amount of the width distance of the two side edges of each protruding structure in the horizontal direction is substantially equal to or slightly smaller than the total width length of N sub-pixels, and N is equal to 3, 4, 6 or 8. The N sub-pixels are classified into corresponding first sub-pixel areas and second sub-pixel areas. The 3D naked-eye optical film has the effect of shortening the optimal viewing distance and provides the optimal 3D viewing distance for human eyes. The utility model further discloses a display device with the 3D naked-eye optical film.

Description

Technical Field

[0001] The present application relates to an optical film structure, and in particular to an optical film for 3D naked vision. Background Art

[0002] Naked 3D display is a technology that allows users to see stereoscopic images without wearing 3D glasses. Specifically, naked-eye 3D display projects processed image information from different angles to different positions in space, so that the left and right eyes of the user corresponding to the different positions receive different image information to produce a parallax effect, thereby achieving the purpose of naked-eye 3D display.

[0003] In the prior art, display devices are limited by the specifications of manufacturers, and display modules have optical film groups of fixed sizes and a certain thickness. If used with a naked-eye 3D optical film, it often loses the optimal viewing distance and does not meet the expectations and needs of users.

[0004] Therefore, how to improve the structural design to shorten the optimal viewing distance of naked-eye 3D and overcome the above-mentioned defects has become one of the important issues that this business wants to solve. Utility Model Content

[0005] The technical problem to be solved by the present application is to provide a 3D naked-view optical film and display device that can effectively shorten the optimal 3D naked-view viewing distance in view of the deficiencies in the prior art.

[0006] In order to solve the above technical problems, a technical solution adopted by the present application is to provide a 3D naked-eye optical film suitable for being attached to a display panel. According to some embodiments, the resolution of the image presented by the display panel is above 1920x1080. The display panel has a plurality of sub-pixels, which are arranged in a first direction and a second direction to form a matrix, and each sub-pixel projects light toward the 3D naked-eye optical film. The 3D naked-eye optical film includes a base and a plurality of protruding structures, wherein the plurality of protruding structures are located on the base; wherein the width of both sides of each protruding structure is projected in the vertical direction, and the projection amount in the horizontal direction is substantially equal to or slightly less than the total width and length of N sub-pixels, N=3, 4, 6, or 8, and the vertical direction is perpendicular to the first direction and the second direction respectively; wherein, among the N sub-pixels, they are classified into corresponding first sub-pixel areas and second sub-pixel areas; wherein, h is the thickness of the 3D naked-eye optical film, d is half of the distance between the two eyes, w is the distance between two adjacent sub-pixels, and n is the refractive index of the protruding structure, and the 3D naked-eye optical film has an optimal viewing distance (OVD), and the optimal viewing distance meets the following relationship:

[0007]

[0008] In a feasible embodiment, the thickness of the protruding structure is 10-40 μm.

[0009] In a feasible embodiment, when viewed from the front, the outer surface of the protruding structure is arc-shaped or pointed.

[0010] In a feasible embodiment, the outer surface of the protruding structure has a first inclined surface, a top surface and a second inclined surface, the top surface is a plane, and the first inclined surface and the second inclined surface have a first angle and a second angle with the top surface respectively.

[0011] In a feasible embodiment, the top surface is a horizontal surface, and the projections of the first inclined surface and the second inclined surface in the horizontal direction are equal in length.

[0012] In a feasible embodiment, the top surface is an inclined surface, and the projections of the first inclined surface, the top surface, and the second inclined surface in a horizontal direction are not equal in length.

[0013] In a feasible embodiment, when viewed in the vertical direction, a side edge of each protruding structure has a deflection angle with respect to the second direction, and the deflection angle is 12°-45°.

[0014] In a possible embodiment, the deflection angle is 18.43°.

[0015] The present application also provides a display device, which includes a display panel and the aforementioned 3D naked-eye optical film. The display panel has a plurality of sub-pixels, which are arranged in a first direction and a second direction to form a matrix, and each sub-pixel projects light toward the 3D naked-eye optical film. The 3D naked-eye optical film is attached to the display panel.

[0016] One of the beneficial effects of the present application is that the 3D naked-eye optical film and display device provided by the present application can effectively shorten the optimal viewing distance and meet the needs of users through technical solutions such as "the projection amount of the width of the two side edges of each protruding structure in the horizontal direction is substantially equal to or slightly less than the total width and length of N sub-pixels, N = 3, 4, 6, or 8", "among the N sub-pixels, they are classified into corresponding first sub-pixel areas and second sub-pixel areas" and "the optimal viewing distance conforms to the aforementioned relationship".

[0017] According to one embodiment, a deflection angle is formed between the side of each protruding structure and the second direction, and the deflection angle ranges from 12° to 45°. This arrangement has the effect of compensating for the dark area between two adjacent sub-pixels, so that the overall visual effect has a consistent brightness.

[0018] To further understand the features and technical contents of the present application, please refer to the following detailed description and drawings of the present application. However, the drawings provided are only for reference and illustration and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional schematic diagram of a 3D naked-eye optical film according to an embodiment of the present application is shown.

[0020] Figure 2 A three-dimensional schematic diagram of a 3D naked-eye optical film according to an embodiment of the present application is shown.

[0021] Figure 3 A three-dimensional schematic diagram of a 3D naked-eye optical film according to an embodiment of the present application is shown.

[0022] Figure 4A A front view of a protruding structure according to an embodiment of the present application is shown.

[0023] Figure 4B A front view of a protruding structure according to an embodiment of the present application is shown.

[0024] Figure 5 A front view schematic diagram illustrating a 3D naked-eye optical film in use according to an embodiment of the present application is shown.

[0025] Figure 6 A schematic diagram of light projection in the use of a 3D naked-eye optical film according to an embodiment of the present application is shown.

[0026] Figure 7 A schematic diagram of a 3D naked-eye optical film in use according to an embodiment of the present application is shown.

[0027] Figure 8 A schematic exploded view of a display device according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0028] The following is an explanation of the implementation methods of the "3D naked-eye optical film and display device" disclosed in this application through specific specific embodiments. Those skilled in the art can understand the advantages and effects of this application from the contents disclosed in this specification. This application can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the concept of this application. In addition, the drawings of this application are only simple schematic illustrations and are not depicted in actual size. It is stated in advance. The following implementation methods will further explain the relevant technical content of this application in detail, but the disclosed content is not intended to limit the scope of protection of this application. In addition, the term "or" used in this article may include any one or more combinations of the associated listed items depending on the actual situation.

[0029] It should be understood that, although the terms "first", "second", "third", etc. may be used herein to describe various components or signals, these components or signals should not be limited by these terms. These terms are mainly used to distinguish one component from another component, or one signal from another signal. In addition, the term "or" used herein may include any one or more combinations of the associated listed items depending on the actual situation.

[0030] See also Figures 1 to 3 , respectively depicting a three-dimensional schematic diagram of a 3D naked-eye optical film 2 of an embodiment of the present application. The 3D naked-eye optical film 2 includes a base 22 and a plurality of protruding structures 21, and the plurality of protruding structures 21 are located on the base 22. The base 22 has an attachment surface that can be attached to the display panel, and the protruding structures 21 are long lenses that are arranged and distributed on the base 22. The outer surface of each protruding structure 21 that protrudes outward is a refractive surface for light. The "outward" protrusion refers to the protrusion in the direction of the viewer's eyes. The protruding structure 21 is used to focus the light projected by the sub-pixels (such as RGB pixels) of the display panel, so that the light beams projected by the RGB pixels can focus two sets of different parallax images to the left eye or right eye of the viewer, respectively, thereby achieving the effect of three-dimensional display. According to some embodiments, the thickness T of the protruding structure 21 is 10-40μm (see Figure 4A ).exist Figure 1 In the embodiment shown, the outer surface of the protruding structure 21 is arc-shaped. However, the present application is not limited thereto. Figure 2 In the embodiment shown, the protruding structure 21 is pointed. Figure 3 In the illustrated embodiment, the outer surface of the protruding structure 21 has a first inclined surface 211 , a top surface 212 and a second inclined surface 213 , similar to a trapezoid (see the following description for details).

[0031] See also FIG. 4A to FIG. 4B , respectively depicting a front view of a protruding structure 21 according to an embodiment of the present application. Figure 4A In the embodiment shown, the top surface 212 of the protruding structure 21 is a plane, and the first inclined surface 211 and the second inclined surface 213 respectively have a first angle θ1 and a second angle θ2 with the top surface 212. The first angle θ1 may be equal to or different from the second angle θ2, depending on Figure 4A In the embodiment shown, the first angle θ1 is equal to the second angle θ2, the top surface 212 is a horizontal plane (parallel to the first direction D1), the first inclined surface 211 and the second inclined surface 213 are projected in the vertical direction D3 to the first direction D1, and their projections are equal in length (here the first direction D1 is the horizontal direction), that is, the projection W1 = W2. Figure 4BIn the embodiment shown, the first angle θ1 is not equal to the second angle θ2, the top surface 212 is an inclined surface (viewed in the forward direction), and the first inclined surface 211, the top surface 212 and the second inclined surface 213 are projected in the first direction D1 in the vertical direction D3, and their projection amounts are not equal in length (here the first direction D1 is the horizontal direction), that is, the projection amount W1 ≠ the projection amount W2 ≠ the projection amount W3, however, the present application is not limited thereto.

[0032] See also Figure 5 , a front view schematic diagram of the use state of the 3D naked-eye optical film 2 of an embodiment of the present application is drawn. The 3D naked-eye optical film 2 is attached to the display panel 3, for example, attached to the display panel 3 through an adhesive layer 4, and the adhesive layer 4 is PSA or OCA, which is not limited by the present application. The resolution of the image presented by the display panel 3 is above 1920x1080, and common specifications include Full HD, 4K and 8K, but this application does not limit it. The display panel 3 has a plurality of sub-pixels (such as red (R) sub-pixels, green (G) sub-pixels and blue (B) sub-pixels), and the plurality of sub-pixels are arranged in a first direction D1 and a second direction D2 to form a matrix, and project light toward the 3D naked-eye optical film 2. According to this embodiment, the first direction D1 is orthogonal to the second direction D2. As Figure 5 As shown, the width P1 of the two side edges 2111 of each protruding structure 21 is projected along the vertical direction D3, and the projection amount in the horizontal direction D1 (in this embodiment, the horizontal direction D1 is the first direction D1) is substantially equal to or slightly less than the total width P2 of the four sub-pixels. Among the four sub-pixels, they are classified into corresponding first sub-pixel areas Z1 and second sub-pixel areas Z2. For example, the number of sub-pixels in the first pixel area Z1 is the same as that in the second sub-pixel area Z2. Figure 5 In the embodiment shown, the first sub-pixel area Z1 includes two sub-pixels, and the second sub-pixel area Z2 includes two sub-pixels, and the sub-pixels emit light toward the 3D naked-eye optical film 2. Light is refracted through the protruding structure 21. In some visible areas, the sub-pixels in the first sub-pixel area Z1 are suitable for viewing by one of the two eyes (such as the left eye), and the sub-pixels in the second sub-pixel area Z2 are suitable for viewing by the other eye (such as the right eye). Three sub-pixels (R, G, B) among the sub-pixels in the multiple first sub-pixel areas Z1 form a full pixel, and three sub-pixels (R, G, B) among the sub-pixels in the multiple second sub-pixel areas Z2 form a full pixel. In this way, the left and right eyes present a visual difference, forming a stereoscopic image effect.

[0033] In some embodiments, the protruding structure 21 of the 3D naked-eye optical film 2 is facing the display panel 3, and the protruding structure 21 and the display panel 3 are attached to each other through the adhesive layer 4. Here, the refractive index of the adhesive layer 4 is less than the refractive index of the 3D naked-eye optical film 2 by at least 0.1. In other embodiments, the protruding structure 21 of the 3D naked-eye optical film 2 is facing the display panel 3, and an air layer may be between the protruding structure 21 and the display panel 3.

[0034] In the present application, R, G, and B are only used to describe sub-pixels. When there are different pixel arrangements in other panels, sub-pixels can be arranged in different forms. Taking the R, G, G, and B arrangement commonly used in OLED as an example, for example, the R and G rows (the first sub-pixels) and the B and G rows (the second sub-pixels) after rotating 45 degrees, that is to say, R, G, and B described in the present application are only for distinguishing adjacent sub-pixels, and do not limit the present application to panels with R, G, and B arrangements.

[0035] In some embodiments, the projection amount of the width of the two side edges 2111 of each protruding structure 21 in the horizontal direction D1 is substantially equal to or slightly less than the total width and length of 6 sub-pixels (i.e., N=6). Among the 6 sub-pixels, they are classified into corresponding first sub-pixel areas Z1 and second sub-pixel areas Z2. The first sub-pixel area Z1 includes 3 sub-pixels, and the second sub-pixel area Z2 includes 3 sub-pixels. These sub-pixels emit light toward the 3D naked-eye optical film 2. The light is refracted through the protruding structure 21. In some visible areas, the sub-pixels of the first sub-pixel area Z1 are suitable for viewing by one of the two eyes (such as the left eye), and the sub-pixels of the second sub-pixel area Z2 are suitable for viewing by the other eye (such as the right eye). Three sub-pixels (R, G, B) in the sub-pixels of the multiple first sub-pixel areas Z1 constitute a full pixel, and three sub-pixels (R, G, B) in the sub-pixels of the multiple second sub-pixel areas Z2 constitute a full pixel. In this way, the human eye can also form a stereoscopic image effect.

[0036] According to some embodiments, the projection amount of the width of the two side edges 2111 of each protruding structure 21 in the horizontal direction D1 is substantially equal to or slightly less than the total width and length of 8 sub-pixels (i.e., N=8). Among the 8 sub-pixels, they are classified into corresponding first sub-pixel areas Z1 and second sub-pixel areas Z2. The first sub-pixel area Z1 includes 4 sub-pixels, and the second sub-pixel area Z2 includes 4 sub-pixels. These sub-pixels emit light toward the 3D naked-eye optical film 2. Through the refraction of the protruding structure 21, in some visible areas, the sub-pixels of the first sub-pixel area Z1 are suitable for viewing by one of the two eyes (such as the left eye), and the sub-pixels of the second sub-pixel area Z2 are suitable for viewing by the other eye (such as the right eye). Three sub-pixels (R, G, B) in the sub-pixels of the multiple first sub-pixel areas Z1 constitute a full pixel, and three sub-pixels (R, G, B) in the sub-pixels of the multiple second sub-pixel areas Z2 constitute a full pixel. In this way, users can also see a three-dimensional display effect with their naked eyes. The present application does not limit the projection amount of the width 2111 of both sides of each protrusion structure 21 in the horizontal direction D1 to be substantially or slightly less than the total width and length of 4, 6 or 8 sub-pixels, which is determined according to the needs of users and manufacturers.

[0037] See also Figure 6 , depicts a light projection diagram of a 3D naked-eye optical film 2 in use according to an embodiment of the present application. Figure 6 In the embodiment shown, the optimal viewing distance OVD meets the following relationship: OVD = h + H, where h is the thickness of the 3D naked-eye optical film 2, and H is the vertical direction D3 (see Figure 8 ), the distance from the top of the 3D naked-eye optical film 2 to the viewer's eyes. Taking the left eye as an example, the sub-pixels 11 (such as the two sub-pixels R and G) of the first sub-pixel area Z1 project light to the eye, α is the angle between the light in the protruding structure 21 and the normal line L, β is the angle between the light after refraction and the normal line L, through the calculation of trigonometric functions, the optimal viewing distance OVD satisfies the following relationship:

[0038]

[0039] Wherein, d is half of the distance between the two eyes, w is the distance between two adjacent sub-pixels in the first direction D1, in this embodiment, N is equal to 4; n is the refractive index of the protruding structure 21, and particularly refers to the refractive index of the material at the top of the protruding structure 21, such as the aforementioned top surface, the aforementioned pointed shape, or the aforementioned arc shape. In this embodiment, it is assumed that the refractive index of air is n air = 1. Generally speaking, the distance between the two eyes is 65mm.

[0040] See also Figure 7, a schematic diagram of the use state of the 3D naked-eye optical film 2 of an embodiment of the present application is drawn. In this embodiment, when observed in the vertical direction D3, there is a deflection angle θ between the side 2111 of each protruding structure 21 and the second direction D2, and the range of the deflection angle θ is 12°-30°. For example, the deflection angle may be 12.53°, 14.036°, 18.43°, 23.96°, 26.57°, 29.05° or 45°. Preferably, the deflection angle θ is 18.43°. By setting the deflection angle θ, it is effective to compensate for the dark area between two adjacent sub-pixels, so that the overall visual has a consistent brightness effect, but the present application is not limited to this, and the present application may also adopt a design without a deflection angle θ.

[0041] See also Figure 8 , a schematic diagram of a decomposed display device 100 of an embodiment of the present application is drawn. The display device 100 includes a display panel 3 and the aforementioned 3D naked optical film 2. The image resolution of the display panel 3 is above 1920×1080. The display panel can be a display of a smart mobile device (such as a mobile phone, a notebook computer), or a desktop computer monitor, or a TV screen, and the present application is not limited. In this embodiment, the 3D naked optical film 2 is attached to the display panel 3 through an adhesive layer 4. The display panel 3 has a plurality of sub-pixels, which are arranged in a first direction D1 and a second direction D2 to form a matrix, and light is projected onto the 3D naked optical film 2, please refer to the above-mentioned relevant description. The positional relationship between the 3D naked optical film 2 and the sub-pixels of the display panel 3 can be adopted Figure 5 The embodiment shown in the figure (the extension direction of the protruding structure 21 is consistent with the second direction D2) can also be used. Figure 7 In the embodiment shown (a deflection angle θ is formed between the side edge 2111 of the protruding structure 21 and the second direction D2), the present application has no limitation on whether the deflection angle θ exists, and the deflection angle θ is set according to the needs of users and manufacturers.

[0042] Beneficial effects of the utility model

[0043] One of the beneficial effects of the present application is that the 3D naked-eye optical film and display device provided by the present application can effectively shorten the optimal viewing distance and meet the needs of users through technical solutions such as "the projection amount of the width of the two side edges of each protruding structure in the horizontal direction is substantially equal to or slightly less than the total width and length of N sub-pixels, N = 3, 4, 6, or 8", "among the N sub-pixels, they are classified into corresponding first sub-pixel areas and second sub-pixel areas" and "the optimal viewing distance conforms to the aforementioned relationship".

[0044] Furthermore, according to one embodiment, through the technical solution of "a deflection angle θ is provided between the side 2111 of each protruding structure 21 and the second direction D2, and the range of the deflection angle θ is 12°-45°", it has the effect of compensating the dark area between two adjacent sub-pixels, so that the overall visual effect has a consistent brightness.

[0045] The contents disclosed above are only preferred feasible embodiments of the present application, and are not intended to limit the protection scope of the claims of the present application. Therefore, all equivalent technical changes made using the contents of the present application specification and drawings are included in the protection scope of the claims of the present application.

Claims

1. A 3D naked-eye optical film, characterized in that: The 3D naked-eye optical film is suitable for being attached to a display panel. The resolution of the image presented by the display panel is above 1920x1080. The display panel has a plurality of sub-pixels, which are arranged in a first direction and a second direction to form a matrix. Each of the sub-pixels projects a light toward the 3D naked-eye optical film. The 3D naked-eye optical film comprises: a base; and a plurality of protruding structures, the plurality of protruding structures being located on the base; The width of two sides of each protruding structure is projected in a vertical direction, and the projection amount in a horizontal direction is substantially equal to or slightly less than the total width and length of N sub-pixels, N=3, 4, 6, or 8, and the vertical direction is perpendicular to the first direction and the second direction respectively; Among the N sub-pixels, they are classified into a corresponding first sub-pixel region and a second sub-pixel region; and Wherein, h is the thickness of the 3D naked-eye optical film, d is half of the distance between the two eyes, w is the distance between two adjacent sub-pixels, n is the refractive index of the protruding structure, and the 3D naked-eye optical film has an optimal viewing distance, which meets the following relationship: The OVD is the optimal viewing distance.

2. The 3D naked-eye optical film according to claim 1, characterized in that: The thickness of the protruding structure is 10-40 μm.

3. The 3D naked-eye optical film according to claim 1, characterized in that: When viewed from a front direction, the outer surface of the protruding structure is arc-shaped or pointed.

4. The 3D naked-eye optical film according to claim 1, characterized in that: The outer surface of the protruding structure has a first inclined surface, a top surface and a second inclined surface. The top surface is a plane. The first inclined surface and the second inclined surface have a first angle and a second angle with the top surface respectively.

5. The 3D naked-eye optical film according to claim 4, characterized in that: The top surface is a horizontal surface, and the projections of the first inclined surface and the second inclined surface in the horizontal direction are equal in length.

6. The 3D naked-eye optical film according to claim 4, characterized in that: The top surface is an inclined surface, and the projections of the first inclined surface, the top surface and the second inclined surface in the horizontal direction are not equal in length.

7. The 3D naked-eye optical film according to claim 1, characterized in that: When observing the plurality of protruding structures from the vertical direction, a deflection angle is formed between a side edge of each of the protruding structures and the second direction, and the deflection angle is 12°-45°.

8. The 3D naked-eye optical film according to claim 7, characterized in that: The deflection angle is 18.43°.

9. A display device, characterized in that: The display device comprises: A display panel having a plurality of sub-pixels arranged in a first direction and a second direction to form a matrix; and According to any one of claims 1 to 8, the 3D naked-eye optical film is attached to the display panel, and each of the sub-pixels projects a light ray toward the 3D naked-eye optical film.

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