Transparent display device

Abstract

A transparent display device comprises a transparent substrate, a pixel array and a light blocking element. The transparent substrate is provided with a plurality of display areas and a plurality of transparent areas. The pixel array is arranged on the transparent substrate and comprises a plurality of pixels and a plurality of openings. Each pixel is overlapped with the corresponding display area. Each opening is overlapped with the corresponding transparent area. The light blocking element includes a plurality of light blocking columns spaced apart from each other. The plurality of pixels are arranged on the first side of the transparent substrate, and the plurality of light blocking columns are arranged on the second side of the transparent substrate.

Description

Technical Field

[0001] The present invention relates to a display device, and in particular to a transparent display device. Background Art

[0002] A transparent display device refers to a display device that can provide a transparent display state for users to view the scene behind it, which is commonly seen in display windows, vending machines, etc. The transparent display device has a display area and a transparent area, wherein the display area can provide a display image for users to view, and the transparent area is transparent so that users can view the scene behind. Pixels are arranged in the display area to emit image beams toward the display surface of the transparent display device to provide an image. However, part of the image beam will be reflected back to the inside of the transparent display device at the interface between the display surface and the outside world, and then pass through the back of the transparent display device, causing a back-side light leakage problem. Summary of the invention

[0003] The invention provides a transparent display device which can improve the back-side light leakage problem.

[0004] The transparent display device of the present invention includes a transparent substrate, a pixel array, a plurality of signal lines and a light blocking element. The transparent substrate has a plurality of display areas and a plurality of transparent areas. The pixel array is arranged on the transparent substrate. The pixel array includes a plurality of pixels and a plurality of openings. The plurality of pixels are arranged in an array along a first direction and a second direction, wherein the first direction and the second direction are staggered, and each pixel overlaps with a corresponding display area. Each opening is surrounded by a portion of the plurality of pixels, and each opening overlaps with a corresponding transparent area. The plurality of signal lines are arranged on the transparent substrate and are electrically connected to the plurality of pixels. The light blocking element includes a plurality of light blocking columns spaced apart from each other. The transparent substrate has a first side and a second side opposite to each other, the plurality of pixels are arranged on the first side of the transparent substrate, and the plurality of light blocking columns are arranged on the second side of the transparent substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 FIG. 4 is a cross-sectional schematic diagram of a transparent display device according to an embodiment of the present invention.

[0006] Figure 2 FIG. 1 is a top view and perspective view of a transparent display device according to an embodiment of the present invention.

[0007] Figure 3 FIG. 4 is a schematic three-dimensional diagram of a light blocking element according to an embodiment of the present invention.

[0008] Figure 4 The relative light leakage amount of the transparent display device according to one embodiment of the present invention at each tilt angle θ in the direction x is shown.

[0009] Figure 5The relative light leakage of the transparent display device according to one embodiment of the present invention at various tilt angles θ in direction y is shown.

[0010] Figure 6 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0011] Figure 7 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0012] Figure 8 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0013] Fig. 9 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0014] Fig.10 The relative light leakage amount of the transparent display device according to one embodiment of the present invention at each tilt angle θ in the direction x is shown.

[0015] Fig.11 The relative light leakage of the transparent display device according to one embodiment of the present invention at various tilt angles θ in direction y is shown.

[0016] Fig.12 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0017] Fig.13 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0018] Fig.14 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0019] Fig.15 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0020] Fig.16 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0021] Fig.17The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0022] Fig.18 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0023] Fig.19 The relative light leakage amount of the transparent display device according to one embodiment of the present invention at each tilt angle θ in the direction x is shown.

[0024] Fig. 20 The relative light leakage of the transparent display device according to one embodiment of the present invention at various tilt angles θ in direction y is shown.

[0025] Fig.21 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0026] Fig. 22 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0027] Fig.23 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0028] Fig.24 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at each tilt angle θ and each azimuth angle Light intensity distribution diagram on .

[0029] Fig.25 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0030] Fig.26 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0031] Fig. 27 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0032] Fig.28 The relative light leakage amount of the transparent display device according to one embodiment of the present invention at each tilt angle θ in the direction x is shown.

[0033] Fig.29 The relative light leakage of the transparent display device according to one embodiment of the present invention at various tilt angles θ in direction y is shown.

[0034] Fig.30 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0035] Fig.31 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0036] Fig.32 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0037] Fig.33 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0038] Fig.34 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0039] Fig.35 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0040] Fig.36 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0041] Fig.37 The relative light leakage amount of the transparent display device according to one embodiment of the present invention at each tilt angle θ in the direction x is shown.

[0042] Fig.38 The relative light leakage amount of the transparent display device according to one embodiment of the present invention at various tilt angles θ in the direction y is shown.

[0043] Fig.39 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0044] Fig.40 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0045] Fig.41 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0046] Fig.42 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0047] Fig.43 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0048] Fig.44 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0049] Fig.45 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on .

[0050] Description of reference numerals:

[0051] 10: Transparent display device

[0052] 10a: Display area

[0053] 10b: Transparent area

[0054] 10f: Display surface

[0055] 10r: Back

[0056] 110: Transparent substrate

[0057] 120: Pixel array

[0058] 122: Pixels

[0059] 122a: Light emitting element

[0060] 122r, 122g, 122b: sub-pixel

[0061] 124: Opening

[0062] 130: Line structure

[0063] 130-1: Longitudinal section

[0064] 130-2: Horizontal part

[0065] 132, 134: Signal line

[0066] 140: Transparent packaging components

[0067] 150: Light blocking element

[0068] 152, 152-1, 152-2: Light blocking column

[0069] 154: Transparent substrate

[0070] 154a: Opening

[0071] D: diameter

[0072] DP: Display Panel

[0073] d: measurement direction

[0074] H: Height

[0075] HX: Pseudo-Hexagon

[0076] HXc: Geometric center

[0077] HXe: Edge

[0078] HXp: Vertex

[0079] OCA: Optical Adhesive

[0080] P1: First spacing

[0081] P2: Second spacing

[0082] P3: The third spacing

[0083] r1: first arrangement direction

[0084] r2: second arrangement direction

[0085] r3: The third arrangement direction

[0086] S1: First side

[0087] S2: Second side

[0088] U, U1, U2: light blocking unit

[0089] x, y: direction

[0090] z: vertical direction

[0091] α, β: Angle

[0092] θ: Tilt angle

[0093] Azimuth DETAILED DESCRIPTION

[0094] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0095] It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it may be directly on or connected to another element, or an intermediate element may also exist. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intermediate elements. As used herein, "connection" may refer to physical and / or electrical connection. Furthermore, "electrical connection" or "coupling" may refer to the presence of other elements between two elements.

[0096] As used herein, "about", "approximately", or "substantially" includes the stated value and the average value within an acceptable deviation range of the particular value determined by one of ordinary skill in the art, taking into account the measurement in question and the particular amount of error associated with the measurement (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, as used herein, "about", "approximately", or "substantially" can select a more acceptable deviation range or standard deviation depending on the optical property, etching property or other property, and can apply to all properties without a single standard deviation.

[0097] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and the present invention, and will not be interpreted as an idealized or overly formal meaning unless explicitly defined as such herein.

[0098] Figure 1 FIG. 4 is a cross-sectional schematic diagram of a transparent display device according to an embodiment of the present invention. Figure 2 This is a top view and perspective diagram of a transparent display device according to an embodiment of the present invention. Figure 1 and Figure 2, the transparent display device 10 includes a transparent substrate 110, a pixel array 120 and a circuit structure 130. The circuit structure 130 includes a plurality of signal lines 132, 134 and is substantially opaque. The transparent substrate 110 has a plurality of display areas 10a and a plurality of transparent areas 10b. In one embodiment, the plurality of transparent areas 10b may include a plurality of areas of the transparent substrate 110 not occupied by the circuit structure 130, and the plurality of display areas 10a may be a plurality of areas of the transparent substrate 110 occupied by the circuit structure 130. For example, in one embodiment, in a top view of the transparent display device 10, the circuit structure 130 is substantially a mesh structure, the mesh structure includes a plurality of longitudinal portions 130-1 and a plurality of transverse portions 130-2 intersecting each other, the plurality of display areas 10a may correspond to a plurality of intersections of the plurality of longitudinal portions 130-1 and the plurality of transverse portions 130-2, respectively, and the plurality of transparent areas 10b may correspond to a plurality of meshes of the mesh structure, but the present invention is not limited thereto. In one embodiment, the transparent substrate 110 may be made of glass, quartz, organic polymer or other applicable materials, but the invention is not limited thereto.

[0099] The pixel array 120 is disposed on the transparent substrate 110. The pixel array 120 includes a plurality of pixels 122 and a plurality of openings 124. The plurality of pixels 122 are arranged in an array along the direction x and the direction y, wherein the direction x and the direction y are staggered. For example, in one embodiment, the direction x and the direction y may be perpendicular to each other, but the present invention is not limited thereto. Each pixel 122 overlaps with a corresponding display area 10a in the vertical direction z, wherein the direction x and the direction y are parallel to the transparent substrate 110, and the vertical direction z is perpendicular to the direction x and the direction y. Each opening 124 is surrounded by a portion of the plurality of pixels 122, and each opening 124 overlaps with a corresponding transparent area 10b in the vertical direction z. For example, in one embodiment, each opening 124 may be a closed opening, but the present invention is not limited thereto.

[0100] In one embodiment, each pixel 122 may include a plurality of sub-pixels 122r, 122g, 122b for emitting a first color light, a second color light, and a third color light, respectively. For example, in one embodiment, the first color light, the second color light, and the third color light may be red light, green light, and blue light, respectively, but the invention is not limited thereto.

[0101] A plurality of signal lines 132 and 134 of the circuit structure 130 are disposed on the transparent substrate 110 and are electrically connected to a plurality of pixels 122. The signal lines 132 and 134 may be any wires for driving the pixels 122. In detail, in one embodiment, the circuit structure 130 further includes a plurality of pixel driving circuits (not shown), each pixel 122 includes a light emitting element 122a, and the light emitting element 122a of each first pixel 122 is electrically connected to a corresponding pixel driving circuit. For example, in one embodiment, the pixel driving circuit may include a first transistor (not shown), a second transistor (not shown), and a capacitor (not shown), the second end of the first transistor is electrically connected to the control end of the second transistor, the capacitor is electrically connected to the second end of the first transistor and the first end of the second transistor, the first electrode (not shown) of the light emitting element 122a is electrically connected to the second end of the second transistor, and the plurality of signal lines 132 and 134 may include a data line electrically connected to the first end of the first transistor, a scan line electrically connected to the control end of the first transistor, and a power line electrically connected to the first end of the second transistor. In one embodiment, the light emitting element 122 a is, for example, a light emitting diode element, but the invention is not limited thereto.

[0102] In one embodiment, the signal lines 132 and 134 may include a plurality of first signal lines 132 extending substantially along the direction y and a plurality of second signal lines 134 extending substantially along the direction x. The longitudinal portion 130-1 and the transverse portion 130-2 of the line structure 130 may include a first signal line 132 and a second signal line 134, respectively. The first signal line 132 and the second signal line 134 may be straight wires or curved wires. The first signal line 132 and the second signal line 134 may be formed by the same or different patterned conductive layers. The first signal line 132 and the second signal line 134 may be signal lines of a single-layer structure or signal lines of a multi-layer stacked structure. The material of the first signal line 132 and the second signal line 134 is preferably an opaque conductive material (e.g., metal), but the present invention is not limited thereto. In one embodiment, one of the first signal line 132 and the second signal line 134 is, for example, a data line, and the other of the first signal line 132 and the second signal line 134 is, for example, a scan line and / or a power line, but the present invention is not limited thereto.

[0103] In one embodiment, the transparent display device 10 may further include a transparent packaging element 140 (shown in FIG. Figure 1), the transparent packaging element 140 is disposed on the first side S1 of the transparent substrate 110 and covers a plurality of pixels 122. The transparent substrate 110, the circuit structure 130, the pixel array 120 and the transparent packaging element 140 can be regarded as a display panel DP. The display panel DP has a display surface 10f and a back surface 10r. In one embodiment, the display surface 10f can be a surface of the transparent packaging element 140, and the back surface 10r can be a surface of the transparent substrate 110 facing away from the pixel array 120. In one embodiment, the transparent packaging element 140 can include a transparent packaging glue and / or a transparent cover plate, but the present invention is not limited thereto.

[0104] Figure 3 FIG. 1 is a three-dimensional schematic diagram of a light blocking element according to an embodiment of the present invention. Figure 1 , Figure 2 and Figure 3 It is worth noting that the transparent display device 10 further includes a light blocking element 150, and the light blocking element 150 includes a plurality of light blocking columns 152 separated from each other, and the plurality of light blocking columns 152 are disposed on the second side S2 of the transparent substrate 110. In other words, the plurality of light blocking columns 152 are disposed on the back side 10r of the display panel DP. The plurality of light blocking columns 152 are a plurality of columns extending in the vertical direction z, and the plurality of columns are spaced apart in the direction x and the direction y parallel to the transparent substrate 110. Please refer to Figure 2 In one embodiment, in the top view of the transparent display device 10 , each light blocking column 152 of the light blocking element 150 may be in a dot shape.

[0105] Please refer to Figure 1 , Figure 2 and Figure 3 In one embodiment, the material of the light-blocking column 152 may include a light-absorbing material. For example, in one embodiment, the material of the light-blocking column 152 may include a black resin, but the present invention is not limited thereto. In one embodiment, the light-blocking column 152 may be a cylinder, and the cylinder may selectively extend in the vertical direction z. However, the present invention is not limited thereto, and in other embodiments, the light-blocking column 152 may also be a column of other shapes, such as but not limited to: an hourglass shape column, an inverted cone shape column, etc.

[0106] Please refer to Figure 1 and Figure 3In one embodiment, the light-blocking element 150 further includes a transparent substrate 154, which is disposed on the second side S2 of the transparent substrate 110 and connected to the transparent substrate 110, wherein the transparent substrate 154 has a plurality of openings 154a, and a plurality of light-blocking columns 152 are respectively disposed in the plurality of openings 154a. For example, in one embodiment, a bare substrate (not shown) may be provided first; then, a laser drilling process may be used to form a plurality of modified regions (not shown) in the bare substrate; then, the plurality of modified regions may be removed by chemical etching to form a plurality of openings 154a; then, a light-blocking material (not shown) is filled in the plurality of openings 154a; then, the light-blocking material is cured to form the light-blocking columns 152 in the plurality of openings 154a; finally, a surface cleaning process is performed to complete the light-blocking element 150. However, the present invention is not limited thereto, and in other embodiments, other methods may also be used to manufacture the light-blocking element 150.

[0107] In one embodiment, the plurality of openings 154a of the light-blocking element 150 may selectively penetrate the transparent substrate 154, and the plurality of light-blocking columns 152 may respectively fill the plurality of openings 154a. However, the present invention is not limited thereto, and in another embodiment, the openings 154a of the light-blocking element 150 may also be blind holes that do not penetrate the transparent substrate 154, and the light-blocking columns 152 do not necessarily have to completely fill the openings 154a.

[0108] In this embodiment, the transparent display device 10 may further include an optical adhesive OCA, wherein the light blocking element 150 may be connected to the back surface 10r of the display panel DP via the optical adhesive OCA.

[0109] Please refer to Figure 2 In one embodiment, a plurality of light-blocking columns 152 are arranged at equal intervals with a first pitch P1 in a first arrangement direction r1 parallel to the transparent substrate 110, a plurality of light-blocking columns 152 are arranged at equal intervals with a second pitch P2 in a second arrangement direction r2 parallel to the transparent substrate 110, and a plurality of light-blocking columns 152 are arranged at equal intervals with a third pitch P3 in a third arrangement direction r3 parallel to the transparent substrate 110. The first arrangement direction r1, the second arrangement direction r2, and the third arrangement direction r3 are interlaced and not perpendicular to each other, and the first pitch P1, the second pitch P2, and the third pitch P3 are substantially equal. For example, in one embodiment, the angle α between the first arrangement direction r1 and the second arrangement direction r2 may be 60°, and the angle β between the first arrangement direction r1 and the third arrangement direction r3 may be 120°, but the present invention is not limited thereto.

[0110] Please refer to Figure 2In some embodiments, the plurality of light-blocking units U include a plurality of light-blocking columns 152, each light-blocking unit U includes seven light-blocking columns 152 among the plurality of light-blocking columns 152, and the seven light-blocking columns 152 include a first light-blocking column 152-1 and six second light-blocking columns 152-2; in a top view of the transparent display device 10, the first light-blocking column 152-1 is disposed on a geometric center HXc of a pseudo-hexagon HX, and the plurality of second light-blocking columns 152-2 are respectively disposed on a plurality of vertices HXp of the pseudo-hexagon HX. More specifically, in one embodiment, the plurality of light-blocking units U include adjacent first light-blocking units U1 and second light-blocking units U2, the first light-blocking unit U1 and the second light-blocking unit U2 share two second light-blocking columns 152-2 among the six second light-blocking columns 152-2 located on the same pseudo-hexagon HX, and the two second light-blocking columns 152-2 are located on the same side HXe of the same pseudo-hexagon HX. That is to say, two sides HXe of the plurality of pseudo-hexagons HX of any two adjacent light-blocking units U may overlap, and the plurality of light-blocking units U are arranged in the densest manner.

[0111] Please refer to Figure 3 The tilt angle θ refers to the angle between the vertical direction z and the measuring direction d. In some embodiments, the transmittance of the light blocking element 150 measured in the normal viewing direction (ie, the tilt angle θ=0°) is preferably greater than 80%, but the present invention is not limited thereto.

[0112] Please refer to Figure 1 and Figure 2 , the light-blocking column 152 has a diameter D in a first arrangement direction r1 parallel to the transparent substrate 110. A plurality of light-blocking columns 152 are arranged at a first pitch P1 in the first arrangement direction r1 parallel to the transparent substrate 110. The light-blocking column 152 has a height H in a vertical direction z perpendicular to the transparent substrate 110. In one embodiment, the height H of the light-blocking column 152 may be greater than 1.5 times the first pitch P1 of the light-blocking column 152. In one embodiment, the diameter D of the light-blocking column 152 may be less than 0.625 times the first pitch P1.

[0113] Figure 4 The relative light leakage amount of the transparent display device according to one embodiment of the present invention at each tilt angle θ in the direction x is shown. Figure 5 The relative light leakage of the transparent display device of one embodiment of the present invention at various tilt angles θ in direction y is shown. The relative light leakage refers to the ratio of the light leakage intensity measured at a certain tilt angle θ to the light leakage intensity measured at a tilt angle θ=0°. Figure 4 and Figure 5The data shown are obtained when the diameter D of the light-blocking column 152 of the transparent display device 10 is fixed at 75 μm and the first pitch P1 of the plurality of light-blocking columns 152 is fixed at 200 μm, and the height H of the light-blocking column 152 is changed to 200 μm, 300 μm, 500 μm and 700 μm respectively.

[0114] Figure 6 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Please refer to the light intensity distribution diagram on Figure 3 The tilt angle θ refers to the angle between the vertical direction z and the measurement direction d (i.e. the direction of measuring the light leakage), and the azimuth angle It refers to the angle between the vertical projection of the measuring direction d on the xy plane (i.e. the plane where the directions x and y are located) and the direction x. Figure 6 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, P1=200 μm and H=200 μm.

[0115] Figure 7 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Figure 7 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, P1=200 μm and H=300 μm. Figure 8 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Figure 8 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, P1=200 μm and H=500 μm. Fig. 9 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig. 9 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, P1=200 μm and H=700 μm.

[0116] Table 1 below shows the peak values ​​of the relative light leakage amounts in directions x and y of the transparent display device 10 and the tilt angle θ at which the peak values ​​occur when the diameter D of the light-blocking column 152 is fixed at 75 μm and the first pitch P1 of the plurality of light-blocking columns 152 is fixed at 200 μm, and the height H of the light-blocking column 152 is changed to 200 μm, 300 μm, 500 μm and 700 μm respectively.

[0117]

[0118]

[0119] [Table 1]

[0120] Please refer to Figures 4 to 9 As shown in Table 1, when the height H of the light-blocking column 152 is greater than or equal to 300 μm, the peak value of the relative light leakage in direction y approaches 1. That is, in some embodiments, preferably, the height H of the light-blocking column 152 is greater than or equal to 300 μm, which can more effectively suppress light leakage in direction y.

[0121] Fig.10 The relative light leakage amount of the transparent display device according to one embodiment of the present invention at various tilt angles θ in the direction x is shown. Fig.11 The relative light leakage of the transparent display device according to one embodiment of the present invention at various tilt angles θ in direction y is shown. Fig.10 and Fig.11 The data shown are obtained when the diameter D of the light-blocking column 152 of the transparent display device 10 is fixed at 75 μm, the height H of the light-blocking column 152 is fixed at 300 μm, and the first pitch P1 of the light-blocking column 152 is changed to 125 μm, 150 μm, 200 μm, 300 μm, 500 μm, 700 μm and 800 μm respectively.

[0122] Fig.12 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.12 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=300 μm and P1=125 μm. Fig.13 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.13 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=300 μm and P1=150 μm. Fig.14 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.14 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=300 μm, and P1=200 μm. Fig.15 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.15 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=300 μm, and P1=300 μm. Fig.16 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.16The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=300 μm, and P1=500 μm. Fig.17 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.17 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=300 μm, and P1=700 μm. Fig.18 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.18 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=300 μm, and P1=800 μm.

[0123] Table 2 below shows the peak values ​​of the relative light leakage amount in directions x and y of the transparent display device 10, the tilt angle θ at which the peak value occurs, and the transmittance of the light blocking element 150 when the diameter D of the light blocking column 152 is fixed at 75 μm and the height H of the light blocking column 152 is fixed at 300 μm and the first pitch P1 of the light blocking column 152 is changed to 125 μm, 150 μm, 200 μm, 300 μm, 500 μm, 700 μm and 800 μm respectively.

[0124]

[0125]

[0126] [Table 2]

[0127] Please refer to Figures 10 to 18 As shown in Table 2, when the height H of the light-blocking column 152 is maintained at 300 μm and the diameter D of the light-blocking column 152 is maintained at 75 μm, when the first pitch P1 of the light-blocking column 152 is less than or equal to 200 μm, the peak value of the relative light leakage in the direction y approaches 1. That is, in some embodiments, preferably, the first pitch P1 of the light-blocking column 152 is less than or equal to 200 μm, which can more effectively suppress the light leakage in the direction y.

[0128] Fig.19 The relative light leakage amount of the transparent display device according to one embodiment of the present invention at various tilt angles θ in the direction x is shown. Fig. 20 The relative light leakage of the transparent display device according to one embodiment of the present invention at various tilt angles θ in direction y is shown. Fig.19 and Fig. 20The data shown are obtained when the diameter D of the light-blocking column 152 of the transparent display device 10 is fixed at 75 μm, the height H of the light-blocking column 152 is fixed at 700 μm, and the first pitch P1 of the light-blocking column 152 is changed to 125 μm, 150 μm, 200 μm, 300 μm, 500 μm, 700 μm and 800 μm respectively.

[0129] Fig.21 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.21 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=700 μm and P1=125 μm. Fig. 22 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig. 22 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=700 μm and P1=150 μm. Fig.23 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.23 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=700 μm and P1=200 μm. Fig.24 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.24 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=700 μm, and P1=300 μm. Fig.25 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.25 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=700 μm, and P1=500 μm. Fig.26 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.26 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=700 μm and P1=700 μm. Fig. 27 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig. 27 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=700 μm, and P1=800 μm.

[0130] Table 3 below shows the peak values ​​of the relative light leakage amount in directions x and y of the transparent display device 10, the tilt angle θ at which the peak value occurs, and the transmittance of the light blocking element 150 when the diameter D of the light blocking column 152 is fixed at 75 μm and the height H of the light blocking column 152 is fixed at 700 μm and the first pitch P1 of the light blocking column 152 is changed to 125 μm, 150 μm, 200 μm, 300 μm, 500 μm, 700 μm and 800 μm respectively.

[0131]

[0132] [Table 3]

[0133] Please refer to Figures 19 to 27 As shown in Table 3, when the height H of the light-blocking column 152 is maintained at 700 μm and the diameter D of the light-blocking column 152 is maintained at 75 μm, when the first pitch P1 of the light-blocking column 152 is less than or equal to 200 μm, the peak value of the relative light leakage in the direction y approaches 1. That is, in some embodiments, preferably, the first pitch P1 of the light-blocking column 152 is less than or equal to 200 μm, which can more effectively suppress the light leakage in the direction y.

[0134] Fig.28 The relative light leakage amount of the transparent display device according to one embodiment of the present invention at each tilt angle θ in the direction x is shown. Fig.29 The relative light leakage of the transparent display device according to one embodiment of the present invention at various tilt angles θ in direction y is shown. Fig.28 and Fig.29 The data shown are obtained when the height H of the light-blocking column 152 is fixed at 300 μm, the first pitch P1 of the light-blocking column 152 is fixed at 200 μm, and the diameter D of the light-blocking column 152 is changed to 25 μm, 50 μm, 75 μm, 100 μm, 125 μm, 150 μm and 175 μm respectively.

[0135] Fig.30 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.30 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=25 μm, H=300 μm, and P1=200 μm. Fig.31 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.31 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=50 μm, H=300 μm, and P1=200 μm. Fig.32 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.32 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=300 μm, and P1=200 μm. Fig.33 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.33 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=100 μm, H=300 μm, and P1=200 μm. Fig.34 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.34 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=125 μm, H=300 μm, and P1=200 μm. Fig.35 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.35 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=150 μm, H=300 μm, and P1=200 μm. Fig.36 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.36 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=175 μm, H=300 μm, and P1=200 μm.

[0136] Table 4 below shows the peak values ​​of the relative light leakage amount in directions x and y of the transparent display device 10, the tilt angle θ at which the peak value occurs, and the transmittance of the light blocking element 150 when the height H of the light blocking column 152 is fixed at 300 μm and the first pitch P1 of the light blocking column 152 is fixed at 200 μm, and the diameter D of the light blocking column 152 is changed to 25 μm, 50 μm, 75 μm, 100 μm, 125 μm, 150 μm and 175 μm respectively.

[0137]

[0138] [Table 4]

[0139] Please refer to Figures 28 to 36As shown in Table 4, when the height H of the light-blocking column 152 is maintained at 300 μm and the first pitch P1 of the light-blocking column 152 is maintained at 200 μm, when the diameter D of the light-blocking column 152 is less than or equal to 125 μm, the peak value of the relative light leakage in the direction y is close to 1 and the transmittance of the light-blocking element 150 is above 50%. That is to say, in some embodiments, preferably, the diameter D of the light-blocking column 152 is less than or equal to 125 μm, which can more effectively suppress the light leakage in the direction y and make the transparent display device 10 still have a considerable sense of transparency.

[0140] Fig.37 The relative light leakage amount of the transparent display device according to one embodiment of the present invention at various tilt angles θ in the direction x is shown. Fig.38 The relative light leakage amount of the transparent display device according to one embodiment of the present invention at various tilt angles θ in the direction y is shown. Fig.37 and Fig.38 The data shown are obtained when the height H of the light-blocking column 152 is fixed at 700 μm, the first pitch P1 of the light-blocking column 152 is fixed at 200 μm, and the diameter D of the light-blocking column 152 is changed to 25 μm, 50 μm, 75 μm, 100 μm, 125 μm, 150 μm and 175 μm respectively.

[0141] Fig.39 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.39 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=25 μm, H=700 μm, and P1=200 μm. Fig.40 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.40 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=50 μm, H=700 μm, and P1=200 μm. Fig.41 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.41 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=75 μm, H=700 μm and P1=200 μm. Fig.42 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.42 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=100 μm, H=700 μm, and P1=200 μm. Fig.43 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.43 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=125 μm, H=700 μm, and P1=200 μm. Fig.44 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.44 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=150 μm, H=700 μm, and P1=200 μm. Fig.45 The transparent display device of an embodiment of the present invention is shown in FIG. 1 at various tilt angles θ and various azimuth angles. Light intensity distribution diagram on . Fig.45 The light intensity distribution diagram of is a light intensity distribution diagram of the transparent display device 10 with D=175 μm, H=700 μm, and P1=200 μm.

[0142] Table 5 below shows the peak values ​​of the relative light leakage amount in directions x and y of the transparent display device 10, the tilt angle θ at which the peak value occurs, and the transmittance of the light blocking element 150 when the height H of the light blocking column 152 is fixed at 700 μm and the first pitch P1 of the light blocking column 152 is fixed at 200 μm, and the diameter D of the light blocking column 152 is changed to 25 μm, 50 μm, 75 μm, 100 μm, 125 μm, 150 μm and 175 μm respectively.

[0143]

[0144] [Table 5]

[0145] Please refer to Figures 37 to 45 As shown in Table 5, when the height H of the light-blocking column 152 is maintained at 700 μm and the first pitch P1 of the light-blocking column 152 is maintained at 200 μm, when the diameter D of the light-blocking column 152 is less than or equal to 125 μm, the peak value of the relative light leakage in the direction y approaches 1 and the transmittance of the light-blocking element 150 is above 50%. That is to say, in some embodiments, preferably, the diameter D of the light-blocking column 152 is less than or equal to 125 μm, which can more effectively suppress the light leakage in the direction y and make the transparent display device 10 still have a considerable sense of transparency.

[0146] In summary, a transparent display device according to an embodiment of the present invention is provided with a light-blocking element on the back side of its display panel. In particular, the light-blocking element includes a plurality of light-blocking columns separated from each other. Therefore, the light-blocking element can play an effect of suppressing back-side light leakage at various azimuth angles, and can also enable the transparent display device to maintain a considerable sense of transparency and good visual effect.

Claims

1. A transparent display device, comprising: A transparent substrate having a plurality of display areas and a plurality of transparent areas; A pixel array is disposed on the transparent substrate, wherein the pixel array comprises: A plurality of pixels are arranged in an array along a first direction and a second direction, wherein the first direction and the second direction are interlaced, and each of the pixels overlaps with a corresponding display area; and A plurality of openings, wherein each of the openings is surrounded by a portion of the pixels, and each of the openings overlaps with a corresponding one of the transparent areas; A plurality of signal lines are disposed on the transparent substrate and electrically connected to the pixels; and A light blocking element comprises a plurality of light blocking columns separated from each other, wherein the transparent substrate has a first side and a second side opposite to each other, the pixels are arranged on the first side of the transparent substrate, and the light blocking columns are arranged on the second side of the transparent substrate. 2 . The transparent display device as claimed in claim 1 , wherein in a top view of the transparent display device, each of the light-blocking columns of the light-blocking element is in a dot shape.

3. The transparent display device as claimed in claim 1, wherein the light blocking element further comprises: A transparent substrate is disposed on the second side of the transparent substrate and connected to the transparent substrate, wherein the transparent substrate has a plurality of openings, and the light-shielding columns are respectively disposed in the openings. The transparent display device as claimed in claim 3 , wherein the openings penetrate the transparent substrate.

5. A transparent display device as described in claim 1, wherein a plurality of light-blocking units include the light-blocking columns, each light-blocking unit includes seven of the light-blocking columns, and the seven light-blocking columns include a first light-blocking column and six second light-blocking columns; in a top view of the transparent display device, the first light-blocking column is arranged at a geometric center of a pseudo-hexagon, and the second light-blocking columns are respectively arranged at a plurality of vertices of the pseudo-hexagon.

6. A transparent display device as described in claim 5, wherein the light blocking units include a first light blocking unit and a second light blocking unit that are adjacent to each other, the first light blocking unit and the second light blocking unit share two of the six second light blocking columns, and the two second light blocking columns are located on the same side of the pseudo-hexagon.

7. A transparent display device as described in claim 1, wherein the light-blocking columns are arranged at equal intervals at a first spacing in a first arrangement direction parallel to the transparent substrate, the light-blocking columns are arranged at equal intervals at a second spacing in a second arrangement direction parallel to the transparent substrate, and the light-blocking columns are arranged at equal intervals at a third spacing in a third arrangement direction parallel to the transparent substrate, the first arrangement direction, the second arrangement direction and the third arrangement direction are staggered and not perpendicular to each other, and the first spacing, the second spacing and the third spacing are substantially equal.

8. A transparent display device as described in claim 1, wherein the light-blocking columns are arranged at a first pitch in a first arrangement direction parallel to the transparent substrate, the first pitch is P1, and the light-blocking column has a height in a vertical direction perpendicular to the transparent substrate, the height is H, and H>1.5×P1.

9. The transparent display device as described in claim 1, wherein the light-blocking columns are arranged at a first pitch in a first arrangement direction parallel to the transparent substrate, the first pitch is P1, and the light-blocking column has a diameter in the first arrangement direction, the diameter is D, and D<0.625×P1. 10 . The transparent display device as claimed in claim 1 , wherein the light-blocking column has a height in a vertical direction perpendicular to the transparent substrate, the height is H, and H≧300 μm. 11 . The transparent display device as claimed in claim 1 , wherein the light-blocking column has a diameter in a first arrangement direction parallel to the transparent substrate, the diameter is D, and D≦125 μm. 12 . The transparent display device as claimed in claim 1 , wherein the light-blocking columns are arranged at a first pitch in a first arrangement direction parallel to the transparent substrate, the first pitch is P1 ≤ 200 μm.

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