JP3243849U - Autostereoscopic optical film and display device - Google Patents

Abstract

The present invention provides an autostereoscopic optical film that has the effect of shortening the optimum viewing distance and provides the optimum viewing distance for the eyes, and a display device having the autostereoscopic optical film. [Solution] The autostereoscopic optical film of the present invention is applied to be attached to a display panel, and the display panel has a plurality of sub-pixels, and the plurality of sub-pixels are arranged along a first direction and a second direction. are arranged in a matrix and project light beams toward the autostereoscopic optical film. The autostereoscopic optical film has a base and a plurality of protruding structures located on the base, and the amount of projection in the horizontal direction of the width between two sides of each protruding structure is N (N = 4, 6 N sub-pixels are classified into corresponding first sub-pixel areas and second sub-pixel areas. [Selection diagram] Figure 1

Description

The present invention relates to an optical film structure, and more particularly to an optical film for autostereoscopic viewing.

Autostereoscopic display is a technology that allows users to view stereoscopic images without wearing 3D glasses. Specifically, autostereoscopic display eliminates the parallax effect by projecting processed image signals from different angles to different positions in space so that the user's left and right eyes corresponding to the different positions receive different image signals. and achieve the purpose of autostereoscopic display.

In current technology, display devices are limited to factory-produced specifications, so the display module has an optical module with a fixed size and a certain thickness, and also includes an autostereoscopic optical film. When used, it often loses the optimal viewing distance and does not meet the user's expectations and needs.

Therefore, how to improve the structural design and overcome the above drawbacks in order to shorten the optimal viewing distance for autostereoscopic viewing is one of the important issues that the industry is trying to solve.

The technical problem to be solved by the present invention is to provide an autostereoscopic optical film and a display device that can effectively shorten the optimal viewing distance for autostereoscopic viewing, in view of the lack of prior art.

（ここで、ＯＶＤは最適視距離、ｈは裸眼立体視光学フィルムの厚さ、ｄは両眼の距離の半分、ｗは隣り合う２つのサブ画素の間隔、ｎは突出構造の屈折率である。） In order to solve the above technical problems, the technical solution adopted by the present invention is to provide an autostereoscopic optical film that is applied to be attached to a display panel. The resolution of the image displayed by the display panel is 1920 x 1080 or more, and the display panel has a plurality of sub-pixels, and the plurality of sub-pixels are arranged in a matrix along the first direction and the second direction. The pixels project light beams toward the autostereoscopic optical film. The autostereoscopic optical film has a base and a plurality of protruding structures located on the base, and the amount of projection in the horizontal direction of the width between two sides of each protruding structure is N (N = 4, 6 N sub-pixels are classified into corresponding first sub-pixel areas and second sub-pixel areas. The autostereoscopic optical film has an optimum viewing distance that satisfies the following relational expression.

(Here, OVD is the optimal viewing distance, h is the thickness of the autostereoscopic optical film, d is half the binocular distance, w is the distance between two adjacent sub-pixels, and n is the refractive index of the protruding structure. .)

In possible embodiments, the thickness of the raised structure is between 3 and 20 μm.

In a possible embodiment, the outer surface of the protruding structure is arcuate or pointed when viewed from the front.

In a possible embodiment, the outer surface of the protruding structure has a first slope, a top surface and a second slope, the top surface being flat, and the first slope and the second slope forming a first included angle and a second slope, respectively, with the top surface. It has an included angle.

In a possible embodiment, the upper surface is a horizontal plane, and the first sloped surface and the second sloped surface have equal projections in the horizontal direction.

In a possible embodiment, the upper surface is a slope, and the first slope, the top surface, and the second slope all have different horizontal projections.

In a possible embodiment, when viewed from the top direction, there is a deflection angle between the side edge of each protruding structure and the second direction, and the deflection angle is between 12° and 30°.

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

The present invention further provides a display device. The display device has a plurality of sub-pixels, each of the plurality of sub-pixels is arranged in a matrix along a first direction and a second direction, and each sub-pixel projects a light beam toward an autostereoscopic optical film. It has a display panel and the autostereoscopic optical film attached to the display panel.

As one of the beneficial effects of the present invention, the autostereoscopic optical film and display device provided by the present invention have the following feature: “The amount of horizontal projection of the width between two sides of each protruding structure is N (N "Substantially equal to or slightly smaller than the total width of the N sub-pixels (= 4, 6, or 8)", "In the N sub-pixels, the corresponding first sub-pixel area and second sub-pixel area Technical proposals such as ``classified'' and ``the optimal viewing distance satisfies the above relational expression'' can effectively approach the optimal viewing distance and satisfy the user's needs.

According to the embodiment, there is a deflection angle between the side edge of each protruding structure and the second direction, and the deflection angle ranges from 12° to 30°. By setting in this way, two adjacent It has the effect of compensating for dark areas between sub-pixels, and has the effect of matching brightness throughout the visual field.

In order to better understand the features and technical content of the present invention, reference will be made to the detailed description of the present invention and the accompanying drawings below. However, the accompanying drawings provided are for reference and explanation only and are not intended to limit the invention.

FIG. 1 is a schematic three-dimensional diagram of an autostereoscopic optical film according to an embodiment of the present invention. FIG. 1 is a schematic three-dimensional diagram of an autostereoscopic optical film according to an embodiment of the present invention. FIG. 1 is a schematic three-dimensional diagram of an autostereoscopic optical film according to an embodiment of the present invention. FIG. 2 is a front view of a protruding structure according to an embodiment of the present invention. FIG. 2 is a front view of a protruding structure according to an embodiment of the present invention. FIG. 1 is a schematic front view of the autostereoscopic optical film according to the embodiment of the present invention in use. FIG. 3 is a schematic diagram of light beam projection during use of the autostereoscopic optical film according to the embodiment of the present invention. FIG. 2 is a schematic diagram of the autostereoscopic optical film according to the embodiment of the present invention in use. 1 is an exploded schematic diagram of a display device according to an embodiment of the present invention; FIG.

Below, embodiments of the "autoscopic stereoscopic optical film and display device" disclosed by the present invention will be described with specific examples. Those skilled in the art can understand the advantages and effects of the present invention based on the disclosure content of this specification. The present invention can be implemented or applied in other different embodiments. Equivalent modifications and changes may be made to various details in this specification based on various viewpoints or applications without departing from the spirit of the invention. In addition, it should be noted in advance that the drawings of the present invention are only for simple and schematic explanation and do not represent actual dimensions. In the following embodiments, technical matters related to the present invention will be explained in more detail, but the disclosed contents are not intended to limit the protection scope of the present invention.

It should be understood that although terms such as "first," "second," and "third" may be used herein to describe various elements or signals, these elements or signals may include It is not intended to be limited by these terms. These terms are primarily used to distinguish one element from another element, or one signal from another signal. Furthermore, the term "or" as used herein may include any one or more combinations of the related items, depending on the actual situation.

Referring to FIGS. 1 to 3, each of FIGS. 1 to 3 is a three-dimensional schematic diagram of an autostereoscopic optical film 2 according to an embodiment of the present invention. The autostereoscopic 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 and can be attached to a display panel, and the protruding structures 21 are elongated lenses arranged and distributed on the base 22. The outwardly projecting outer surface of each protruding structure 21 is a light ray refracting surface. The term "protruding outward" refers to protruding toward the viewer's eyes. The protruding structure 21 concentrates the light rays projected by the sub-pixels (for example, RGB pixels) of the display panel, so that the light rays projected by the RGB pixels concentrate two sets of different parallax images on the left eye or the right eye of the viewer, respectively. This is to achieve a three-dimensional display effect. According to some embodiments, the thickness T of the protruding structure 21 is between 3 and 20 μm (see FIG. 4A). In the embodiment shown in FIG. 1, the outer surface of the protrusion structure 21 is arcuate, but the present invention is not limited thereto. In the embodiment shown in FIG. 2, the protruding structure 21 is pointed. Further, according to the embodiment shown in FIG. 3, the outer surface of the protruding structure 21 has a first slope 211, an upper surface 212, and a second slope 213, and resembles a trapezoid (details will be described later).

Referring to FIGS. 4A and 4B, each of FIGS. 4A and 4B is a front view of a protruding structure 21 according to an embodiment of the present invention. In the embodiment shown in FIG. 4A, the upper surface 212 of the protruding structure 21 is a flat surface, and the first slope 211 and the second slope 213 have a first included angle θ1 and a second included angle θ2 with the upper surface 212, respectively. The first included angle θ1 may be the same as or different from the second included angle θ2. According to the embodiment shown in FIG. 4A, the first included angle θ1 and the second included angle θ2 are the same, and the upper surface 212 is ( The first slope 211 and the second slope 213 are projected in the first direction D1 from the vertical direction D3, and the amount of projection is equal (here, the first direction D1 is horizontal). ), that is, the projection amount W1=the projection amount W2. Further, according to the embodiment shown in FIG. 4B, the first included angle θ1 and the second included angle θ2 are different, the upper surface 212 is an inclined surface (when observed from the front direction), and the first included angle 211, the upper surface 212, and the second included angle θ2 are different. The slope 213 is projected from the vertical direction D3 to the first direction D1, and the projection amounts are different (here, the first direction D1 is the horizontal direction), that is, the projection amount W1≠projection amount W2≠projection amount W3. However, the present invention is not limited to this.

Referring to FIG. 5, FIG. 5 is a schematic front view of the autostereoscopic optical film 2 according to the embodiment of the present invention in use. The autostereoscopic optical film 2 is attached to the display panel 3, for example, by an adhesive layer 4, the adhesive layer 4 being PSA or OCA, but the present invention is not limited thereto. The resolution of the image displayed by the display panel 3 is 1920x1080 or higher, and common standards include Full HD, 4K, and 8K, but the present invention is not limited thereto. The display panel 3 has a plurality of sub-pixels (for example, a red (R) sub-pixel, a green (G) sub-pixel, and a blue (B) sub-pixel), and the plurality of sub-pixels are arranged in a first direction D1 and a second direction, respectively. They are arranged in a matrix along D2 and project light rays toward the autostereoscopic optical film 2. According to this embodiment, the first direction D1 and the second direction D2 are orthogonal. As shown in FIG. 5, the projection in the horizontal direction D1 of the width P1 of the two sides 2111 of each protruding structure 21 is substantially equal to or slightly smaller than the total width P2 of the four sub-pixels; The sub-pixels are classified into corresponding first sub-pixel area Z1 and second sub-pixel area Z2, and the term "corresponding" means, for example, that the number of sub-pixels in the first sub-pixel area Z1 and the second sub-pixel area Z2 are 5, the first sub-pixel area Z1 includes two sub-pixels, the second sub-pixel area Z2 includes two sub-pixels, and these sub-pixels are used for autostereoscopic viewing. Light is emitted towards the optical film 2. Due to the refraction effect of the protruding structure 21, the light rays in some visible regions are suitable for viewing with one eye (for example, the left eye) of the first sub-pixel area Z1, and the second sub-pixel The subpixels in area Z2 are suitable for viewing with the other eye (for example, the right eye). Three sub-pixels (R, G, B) in the sub-pixels of the plurality of first sub-pixel areas Z1 constitute the whole pixel, and three sub-pixels (R, G, B) in the sub-pixels of the plurality of second sub-pixel areas Z2 constitute the whole pixel. , B) constitute all pixels. This creates a visual difference between the left and right eyes, forming a three-dimensional image.

In some embodiments, the projected amount in the horizontal direction D1 of the width between the two sides 2111 of each protruding structure 21 is substantially equal to the total width of the six sub-pixels (i.e., N=6). Slightly smaller than that, the six sub-pixels are classified into corresponding first sub-pixel area Z1 and second sub-pixel area Z2, the first sub-pixel area Z1 includes three sub-pixels, and the second sub-pixel area Z2 includes three sub-pixels, and these sub-pixels emit light toward the autostereoscopic optical film 2. Due to the refraction effect of the protruding structure 21, the light rays in some visible regions are suitable for viewing with one eye (for example, the left eye) of the first sub-pixel area Z1, and the second sub-pixel The subpixels in area Z2 are suitable for viewing with the other eye (for example, the right eye). Three sub-pixels (R, G, B) in the sub-pixels of the plurality of first sub-pixel areas Z1 constitute the whole pixel, and three sub-pixels (R, G, B) in the sub-pixels of the plurality of second sub-pixel areas Z2 constitute the whole pixel. , B) constitute all pixels. Thereby, a three-dimensional image can be similarly formed with the human eye.

Further, according to some embodiments, the amount of projection in the horizontal direction D1 of the width between the two sides 2111 of each protruding structure 21 is equal to the total width of eight sub-pixels (i.e., N=8). The eight sub-pixels are classified into a first sub-pixel area Z1 and a second sub-pixel area Z2, which are substantially equal or slightly smaller, and the first sub-pixel area Z1 includes four sub-pixels, and the first sub-pixel area Z1 includes four sub-pixels; The two sub-pixel area Z2 includes four sub-pixels, and these sub-pixels emit light toward the autostereoscopic optical film 2. Due to the refraction effect of the protruding structure 21, the light rays in some visible regions are suitable for viewing with one eye (for example, the left eye) of the first sub-pixel area Z1, and the second sub-pixel The subpixels in area Z2 are suitable for viewing with the other eye (for example, the right eye). Three sub-pixels (R, G, B) in the sub-pixels of the plurality of first sub-pixel areas Z1 constitute the whole pixel, and three sub-pixels (R, G, B) in the sub-pixels of the plurality of second sub-pixel areas Z2 constitute the whole pixel. , B) constitute all pixels. This also allows the user to see the stereoscopic display effect with the naked eye. The present invention provides that the projected amount of the width between the two sides 2111 of each protruding structure 21 in the horizontal direction D1 is substantially equal to or slightly smaller than the total width of 4, 6 or 8 sub-pixels. The system is not limited to the above, and users and producers can install it according to their needs.

Referring to FIG. 6, FIG. 6 is a schematic diagram of light beam projection during use of the autostereoscopic optical film 2 according to the embodiment of the present invention. In the present invention, according to the embodiment shown in FIG. 6, the optimal viewing distance OVD satisfies the following relational expression OVD=h+H. h is the thickness of the autostereoscopic optical film 2, and H is the distance from the upper end of the autostereoscopic optical film 2 to the viewer's eyes in the vertical direction D3 (see FIG. 6). Taking the left eye as an example, the sub-pixels 11 (for example, two sub-pixels of R and G) in the first sub-pixel area Z1 project light rays toward the eye, and α is the normal line to the light ray within the protruding structure 21. β is the included angle between the refracted light ray and the normal L, and by calculation of trigonometric functions, the optimal viewing distance OVD satisfies the following relational expression.

where d is half the binocular distance, w is the spacing in the first direction D1 of two adjacent sub-pixels, in this example N is equal to 4, and n is the refraction of the protruding structure 21. In particular, it refers to the refractive index of the material of the upper end of the protruding structure 21, which is, for example, the upper surface, the pointed shape, or the arcuate shape. In this example, it is assumed that the refractive index of air n _air =1. Typically, the distance between the eyes is 65 mm.

Referring to FIG. 7, FIG. 7 is a schematic diagram of the autostereoscopic optical film 2 according to the embodiment of the present invention in use. In this embodiment, when observed from the top direction, there is a deflection angle θ between the side 2111 of each protrusion structure 21 and the second direction D2, and the range of the deflection angle θ is 12° to 30°. By way of example, the deflection angle may be 12.53°, 14.036°, 18.43°, 23.96°, 26.57° or 29.05°. Preferably, the deflection angle θ is 18.43°. By setting the deflection angle θ, it has the effect of compensating for the dark area between two adjacent sub-pixels, and has the effect of matching the brightness throughout the visual field, but the present invention is not limited to this, A design without this may also be adopted.

Referring to FIG. 8, FIG. 8 is an exploded schematic diagram of a display device 100 according to an embodiment of the present invention. The display device 100 includes a display panel 3 and the autostereoscopic optical film 2 described above. The image resolution of the display panel 3 is 1920×1080 or higher. The display panel may be a display of a smart mobile device (eg, mobile phone, laptop), a desktop computer display or a television screen, but the present invention is not limited thereto. In this embodiment, the autostereoscopic optical film 2 is attached to the display panel 3 by an adhesive layer 4. The display panel 3 has a plurality of sub-pixels, each of which is arranged in a matrix along a first direction D1 and a second direction D2, and projects light rays toward the autostereoscopic optical film 2, See above for related explanation. For the positional relationship between the autostereoscopic optical film 2 and the sub-pixels of the display panel 3, the method of the embodiment shown in FIG. Although the embodiment shown in 7 (having a deflection angle θ between the side 2111 of the protruding structure 21 and the second direction D2) may be adopted, the present invention does not limit whether or not the deflection angle θ is provided. First, users and producers can install them according to their needs.

[Beneficial effects of examples]
As one of the beneficial effects of the present invention, the autostereoscopic optical film and display device provided by the present invention have the following feature: "The horizontal projection amount of the width of the two sides of each protruding structure is N (N= "Substantially equal to or slightly smaller than the total width of N sub-pixels (4, 6, or 8)", "N sub-pixels are classified into corresponding first sub-pixel areas and second sub-pixel areas. By technical proposals such as "the optimal viewing distance satisfies the above relational expression", the optimal viewing distance can be effectively approached and the user's needs can be met.

Furthermore, according to the embodiment, according to the technical solution "each protrusion structure 21 has a deflection angle θ between the side 2111 and the second direction D2, and the deflection angle θ is in the range of 12° to 30°", This has the effect of compensating for dark areas between two adjacent sub-pixels, and has the effect of matching brightness throughout the visual field.

The contents disclosed above are merely preferred embodiments of the present invention, and do not limit the scope of the utility model registration claims of the present invention. All equivalent technical modifications made based on this invention shall be included in the scope of the utility model registration claims of the present invention.

2: Autostereoscopic optical film 21: Protruding structure 211: First slope 2111: Side 212: Top surface 213: Second slope 22: Base 100: Display device 3: Display panel 11: Sub-pixel 4: Adhesive layer D1: First 1 direction D2: Second direction D3: Vertical direction d: Half the distance between both eyes H: Distance h: Thickness L: Normal P1: Width P2: Total width W1 to W3: Projection amount w: Interval T: Thickness Z1: First sub-pixel area Z2: Second sub-pixel area θ: Deflection angle θ1: First included angle θ2: Second included angle α: Included angle β: Included angle

Claims (9)

An autostereoscopic optical film applied to be attached to a display panel, wherein the resolution of the image displayed by the display panel is 1920 x 1080 or more, and the display panel has a plurality of sub-pixels, and a plurality of sub-pixels. the sub-pixels of are arranged in a matrix along a first direction and a second direction, each sub-pixel projecting a light beam towards an autostereoscopic optical film;
The autostereoscopic optical film is
The base and
a plurality of protruding structures located at the base;
The width projected in the horizontal direction between two sides of each of the protruding structures is substantially equal to or slightly smaller than the total width of N (N=4, 6 or 8) sub-pixels. ,
The N sub-pixels are classified into corresponding first sub-pixel areas and second sub-pixel areas,
An autostereoscopic optical film having an optimal viewing distance that satisfies the following relational expression.

(Here, OVD is the optimal viewing distance, h is the thickness of the autostereoscopic optical film, d is half the binocular distance, w is the distance between the two adjacent sub-pixels, and n is the refraction of the protruding structure. ) The autostereoscopic optical film according to claim 1, wherein the thickness of the protruding structure is 3 to 20 μm. The autostereoscopic optical film according to claim 1, wherein the outer surface of the protruding structure is arcuate or pointed when observed from the front. The outer surface of the protruding structure has a first slope, an upper surface, and a second slope, the upper surface being a flat surface, and the first slope and the second slope forming a first included angle and a second included angle with the upper surface, respectively. The autostereoscopic optical film according to claim 1, comprising: The autostereoscopic optical film according to claim 4, wherein the upper surface is a horizontal plane, and the first slope and the second slope have equal projection amounts in the horizontal direction. 5. The autostereoscopic optical film according to claim 4, wherein the upper surface is a slope, and the first slope, the top surface, and the second slope have different projection amounts in the horizontal direction. The autostereoscopic optical film according to claim 1, which has a deflection angle between a side edge of each of the protruding structures and the second direction, and the deflection angle is 12° to 30° when observed from the top direction. The autostereoscopic optical film according to claim 7, wherein the deflection angle is 18.43°. A display panel having a plurality of sub-pixels, each of the plurality of sub-pixels being arranged in a matrix along a first direction and a second direction, and each of the sub-pixels emitting a light beam toward an autostereoscopic optical film. a display panel to project;
A display device comprising: the autostereoscopic optical film according to claim 1 , which is attached to the display panel.

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