Display device

Abstract

The present disclosure provides a display device, including a display panel and a backlight module. The backlight module is arranged corresponding to the display panel, and the backlight module includes a substrate, a plurality of light-emitting units, an optical film group and a filling element. The substrate has a first surface, and the first surface is arranged toward the display panel. A plurality of light-emitting units are arranged on the first surface. The optical film group is arranged between the light-emitting units and the display panel. The filling element is arranged between the substrate and the optical film group, and the filling element includes a transparent characteristic material. The first surface has a first distance from the display panel, and the first distance is between 0.8 millimeters (mm) and 9 millimeters.

Description

[0001] The present invention is a divisional application of the invention with application number 201811038431.1, application date September 6, 2018, and invention name “Display Device”. Technical Field

[0002] The present disclosure relates to a display device, and more particularly to a display device capable of improving brightness uniformity. Background Art

[0003] As display devices develop towards high dynamic range imaging (HDR) or thinness, the high dynamic range imaging effect can now be improved by operating the direct backlight source in different areas. Since the multiple light-emitting units of the direct backlight source are spaced apart from each other, when the light source irradiates the display panel above, the brightness of the light source corresponding to the distance between the light-emitting units above may be lower than the brightness of the light source corresponding to the light-emitting unit above, resulting in different brightness uniformity of the light entering the display panel. In order to improve the brightness uniformity of the light entering the display panel, a light mixing area is configured between the direct backlight source and the display panel, but in this case, it does not conform to the thin design. Therefore, a display device that uses a direct backlight source and has a thin design is one of the important topics currently being developed. Summary of the invention

[0004] In view of this, the present disclosure provides a display device to solve the above-mentioned problem.

[0005] An embodiment of the present disclosure provides a display device, including a display panel and a backlight module. The backlight module is arranged corresponding to the display panel, and the backlight module includes a substrate, a plurality of light-emitting units, an optical film group, and a filling element. The substrate has a first surface, and the first surface is arranged toward the display panel. A plurality of light-emitting units are arranged on the first surface. The optical film group is arranged between the light-emitting units and the display panel. The filling element is arranged between the substrate and the optical film group, and the filling element includes a transparent characteristic material. The first surface has a first distance from the display panel, and the first distance is between 0.8 mm and 9 mm.

[0006] The embodiment of the present disclosure provides a direct-type display device, including a display panel and a backlight module. The backlight module includes an optical film group, and the optical film group has four or more prism layers (Prism layer) to improve the brightness uniformity of the display device. Furthermore, the distance between the optical film group and the light-emitting unit can be designed to be between 0 mm and 5 mm (0 mm ≦ the distance between the optical film group and the light-emitting unit ≦ 5 mm), thereby reducing the thickness of the display device and being more in line with the thin design. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] The present disclosure is clearly understood by the following detailed description in conjunction with the accompanying drawings. Various features are not drawn to scale and are only used for illustrative purposes. For the sake of clarity, the size of various features will be arbitrarily enlarged or reduced.

[0008] Figure 1 FIG. 4 is a perspective exploded view of a display device according to an embodiment of the present disclosure.

[0009] Figure 2 Schematic diagram of the structure of a display device according to an embodiment of the present disclosure.

[0010] Figure 3 FIG. 4 is a schematic structural diagram of a display device according to another embodiment of the present disclosure.

[0011] Figure 4 FIG. 4 is a schematic structural diagram of a display device according to another embodiment of the present disclosure.

[0012] Figure 5 A schematic diagram of a display device according to another embodiment of the present disclosure

[0013] Figure 6 FIG. 4 is a schematic structural diagram of a display device according to another embodiment of the present disclosure.

[0014] Figure 7 FIG. 4 is a schematic structural diagram of a display device according to another embodiment of the present disclosure.

[0015] Figure 8 FIG. 4 is a schematic structural diagram of a display device according to another embodiment of the present disclosure.

[0016] Fig. 9 is a perspective exploded view of a display device according to another embodiment of the present disclosure.

[0017]

Explanation of symbols

[0018] 100~800: Display device

[0019] 102: Display panel

[0020] 104: Backlight module

[0021] 105: Frame

[0022] 106:Substrate

[0023] 1061: first surface

[0024] 1063: Conductive pad

[0025] 108: Light-emitting unit

[0026] 1081:Package structure

[0027] 1083: Light-emitting chip

[0028] 1085:Structural surface

[0029] 110: Optical film set

[0030] 111, 111A: first prism layer

[0031] 112, 112A: second prism layer

[0032] 113: Third prism layer

[0033] 114: The fourth prism layer

[0034] 115: Fifth prism layer

[0035] 116: Sixth prism layer

[0036] 120: Diffuser

[0037] 130: Optical integration components

[0038] 140: Diffuser

[0039] D1: First distance

[0040] D2: Second distance

[0041] D3: The third distance

[0042] D4: The fourth distance

[0043] Dp: Spacing

[0044] d: distance

[0045] 105a: Bottom

[0046] 105b: Extension

[0047] AE: Adhesive Components

[0048] ES: light emitting surface

[0049] FE: Filling element

[0050] X: X-axis direction

[0051] Y: Y axis direction

[0052] Z: Z-axis direction DETAILED DESCRIPTION

[0053] In order to make the purpose, features, and advantages of the present disclosure more obvious and easy to understand, the following embodiments are specifically cited and illustrated with accompanying drawings. The partial repetition of the figure numbers in the embodiments is for the purpose of simplifying the description and does not mean the correlation between different embodiments. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only referenced to the directions of the attached drawings and are not used to limit the present disclosure.

[0054] It should be understood that the elements specifically described or illustrated may exist in various forms known to those skilled in the art. In addition, when a layer is "on" another layer or substrate, it may mean "directly" on the other layer or substrate, or that a layer is on the other layer or substrate, or that other layers are sandwiched between other layers or substrates.

[0055] In addition, relative terms, such as "lower" or "bottom" and "upper" or "top", are used in the embodiments to describe the relative relationship of one element in the diagram to another element. If the device in the diagram is turned upside down, the element described on the "lower" side will become the element on the "upper" side.

[0056] Here, the terms "about" and "approximately" mean within 20%, preferably within 10%, and more preferably within 5% of a given value or range. The quantities given here are approximate quantities, which means that the meaning of "about" and "approximately" can still be implied without specific instructions.

[0057] Figure 1 is a perspective exploded view of a display device 100 according to an embodiment. Figure 2 1 is a schematic diagram of a display device 100 according to an embodiment. The display device 100 may be, for example, a straight-down display device. The display device 100 may include a display panel 102 and a backlight module 104, and the backlight module 104 is disposed corresponding to the display panel 102. Figure 1 or Figure 2 As shown, the display panel 102 and the backlight module 104 are arranged correspondingly along the Z-axis direction. Figure 2As shown, the display panel 102 includes, for example, two substrates (not shown), a display layer (not shown) and a drive circuit layer (not shown), and the display layer is disposed between the two substrates. One of the two substrates is, for example, an array substrate, and the other is, for example, a color filter substrate, but is not limited thereto. In other embodiments, the color filter layer may be disposed on the array substrate. The substrate material includes, for example, glass, quartz, organic polymers or metals, and the organic polymers include, for example, polyimide (PI), polyethylene terephthalate (PET), polycarbonate (PC), etc., but are not limited thereto. The drive circuit layer may include transistors (such as switching transistors, drive transistors, or other transistors), data lines, scan lines, or dielectric layers or other circuits, but the present disclosure is not limited thereto. The color filter layer may include filter layers for red, green, blue or other light bands. In other embodiments, the color filter layer may be replaced by a light conversion material, and the light conversion material includes quantum dots (QD), fluorescence, phosphor, other suitable materials or combinations thereof, but is not limited thereto. The display layer includes, for example, liquid crystal (LC), organic light-emitting diode (OLED), quantum dots, fluorescence, phosphor, light-emitting diode (LED), micro light-emitting diode or mini light-emitting diode, or other display media, but is not limited thereto. In some embodiments, the chip size of the light-emitting diode is about 300 microns (μm) to 10 mm, the chip size of the mini LED is about 100 microns to 300 microns, and the chip size of the micro LED is about 1 micron to 100 microns, but is not limited thereto.

[0058] The display device 100 may, for example, include an outer frame 105 for accommodating or installing the display panel 102 and the backlight module 104, but is not limited thereto. The material of the outer frame 105 may, for example, be a material having a heat dissipation or supporting effect, but is not limited thereto. For example, the outer frame 105 may include plastic, metal (including stainless steel, aluminum alloy or other metal or metal alloy), ceramic, other suitable materials or a combination of the above. The outer frame 105 may, for example, be made by injection molding, insert molding, stamping molding or other suitable methods, but is not limited thereto. In some embodiments, the outer frame 105 may, for example, be fixed or connected to a substrate 106 of the backlight module 104 by an adhesive element AE or a fixing element (not shown). The adhesive element AE includes double-sided tape, silicone, light-curing adhesive (such as UV adhesive or adhesive cured by other wavelength band light), epoxy adhesive, acrylic adhesive, moisture-curing adhesive, optical clear adhesive (OCA), optical clear resin (OCR), or other polymers or combinations thereof, but not limited thereto. In some embodiments, the outer frame 105 is, for example, divided into a bottom 105a and an extension 105b, the extension 105b being connected to the bottom 105a, wherein the bottom 105a is arranged corresponding to the substrate 106, that is, the bottom 105a is arranged substantially parallel to the substrate 106, and the extension 105b has an extension direction, and this extension direction is different from the extension direction of the bottom 105a. For example, the angle between the bottom 105a and the extension 105b is, for example, between 70 degrees and 140 degrees (70 degrees≦angle≦140 degrees), but not limited thereto.

[0059] like Figure 2 As shown, the angle between the bottom 105a and the extension 105b is about 90 degrees, and the extension 105b extends in the Z-axis direction, for example. In some embodiments, the thickness of the bottom 105a (i.e., the maximum thickness in the Z-axis direction) may be between 0.05 mm and 0.5 mm (0.05 mm≦the thickness of the bottom 105a≦0.5 mm), for example, about 0.1 mm. In some embodiments, the thickness of the adhesive element AE (the maximum thickness in the Z-axis direction) may be between 0.02 mm and 0.1 mm (0.02 mm≦the thickness of the adhesive element AE≦0.1 mm), for example, about 0.03 mm, but not limited thereto. In one embodiment, the thickness of the bottom 105a may only measure the maximum thickness of the bottom 105a in the Z-axis direction in a local area. In one embodiment, the thickness of the adhesive element AE may only measure the maximum thickness of the adhesive element AE in the Z-axis direction in a local area.

[0060] like Figure 2As shown, the backlight module 104 may include a substrate 106, a plurality of light-emitting units 108, a plurality of conductive pads 1063 and an optical film group 110. The substrate 106 may include glass, a printed circuit board (PCB), a flexible printed circuit board (FPC), other suitable materials, or a combination thereof, but not limited thereto. In some embodiments, the substrate 106 has a first surface 1061, the first surface 1061 is, for example, disposed toward the display panel 102, and a plurality of conductive pads 1063 may be, for example, disposed on the first surface 1061 of the substrate 106, but not limited thereto. The light-emitting unit 108 is, for example, disposed on the first surface 1061 of the substrate 106 and electrically connected to the conductive pad 1063. The substrate 106, for example, has some driving circuits (not shown) for controlling or operating the light-emitting unit 108. The light-emitting unit 108 is, for example, located between the display panel 102 and the substrate 106, that is, the backlight module 104 is a straight-down backlight module.

[0061] The light-emitting unit 108 includes a light-emitting diode (LED), a micro light-emitting diode (mini LED or micro LED), an organic light-emitting diode or other suitable light-emitting elements, but is not limited thereto. In some embodiments, the light-emitting unit 108 may include a light-conversion material, and the light-conversion material includes quantum dots, fluorescence, phosphorescence, other suitable light-conversion materials, or a combination of the above, but is not limited thereto. In some embodiments, the light-conversion material is, for example, disposed adjacent to the light-emitting chip 1083, but is not limited thereto. The light-emitting chip 1083 may, for example, emit a blue light source, but is not limited thereto. In other embodiments, different light-emitting chips 1083, for example, emit light sources of different wavelengths, such as red light, blue light, green light, ultraviolet (UV) light, or other light with a suitable wavelength, but are not limited thereto. The material of the conductive pad 1063 includes, for example, nickel (Ni), gold (Au), platinum (Pt), silver (Ag), copper (Cu), iron (Fe), nickel (Ni), tin (Sn), aluminum (Al), magnesium (Mg), palladium (Pd), iridium (Ir), rhodium (Rh), ruthenium (Ru), zinc (Zn), other suitable conductive materials, alloys thereof, or combinations thereof, but is not limited thereto.

[0062] like Figure 2As shown, the light-emitting unit 108 may include, for example, a light-emitting diode or a micro light-emitting diode. The light-emitting unit 108 may include a packaging structure 1081 and a light-emitting chip 1083. The light-emitting chip 1083 is, for example, disposed in the packaging structure 1081, or covered by the packaging structure 1081, but is not limited thereto. In some embodiments, a plurality of light-emitting chips 1083 may be disposed in a packaging structure 1081, and these light-emitting chips 108 may, for example, emit light having the same wavelength band, but is not limited thereto. When the light-emitting chip 1083 is a light-emitting diode or a micro light-emitting diode, it may include, for example, a p-type semiconductor, a quantum well layer, an n-type semiconductor, an anode electrode, and a cathode electrode. The quantum well layer includes a single quantum well (SQW) or multiple quantum wells (MQW), and the material of the quantum well layer may include indium gallium nitride (InGaN), gallium nitride (GaN), or a combination thereof, but is not limited thereto. The light emitting chip 1083 may be a flip chip type light emitting diode or a vertical type light emitting diode, but is not limited thereto. In some embodiments, the material of the packaging structure 1081 may include a transparent material or a heat resistant material, but is not limited thereto. The material of the packaging structure 1081 may include epoxy, silicone, other suitable materials or a combination thereof, but is not limited thereto. Figure 2 The cross-sectional profile of the package structure 1081 in the embodiment is a rectangle, but in some embodiments, the cross-sectional profile of the package structure 1081 may have an arc-shaped edge shape (including a semi-ellipse), a double hillside shape, or other irregular shapes, and is not limited thereto. In some embodiments, the package structure 1081 may function as an optical lens (second lens). Figure 2 As shown, the packaging structure 1081 of the light emitting unit 108 has a structure surface 1085, and the structure surface 1085, for example, faces the display panel 102. In some embodiments, the structure surface 1085 can be, for example, a flat surface, that is, the structure surface 1085 is substantially parallel to the first surface 1061. In some embodiments, the structure surface 1085 is, for example, an arc-shaped surface, a double hillside-shaped surface, or other irregular-shaped surfaces.

[0063] In addition, in the embodiment of the present disclosure, the optical film set 110 may include a plurality of prism layers, and the number of the prism layers is equal to or greater than four. Figure 2As shown, the optical film set 110 includes a first prism layer 111, a second prism layer 112, a third prism layer 113 and a fourth prism layer 114, and these prism layers are sequentially arranged along the Z-axis direction, wherein the first prism layer 111 is farthest from the display panel 102, and two adjacent prism layers may be in contact or not in contact. For example, there may be an air layer or other layers (or elements), such as an adhesive layer, between two adjacent prism layers, but it is not limited thereto.

[0064] In addition, the backlight module 104 may include a diffuser 120. The diffuser 120 may be made in various ways or materials, such as coating an optical film with a light diffusion mixed material layer, forming a concave-convex structure on the surface of the optical film, adding scattering particles, diffusing particles or refractive particles inside the optical film, doping hollow beads or polymer particles filled with air or gas inside the optical film, an optical film with a microporous structure inside, a combination of the above, or other suitable materials, but not limited to. In some embodiments, the diffuser 120 is, for example, disposed between two of the prism layers. Figure 2 As shown, the diffusion sheet 120 is, for example, disposed between the second prism layer 112 and the third prism layer 113 , so the display device can reduce interference fringes through the disposition of the diffusion sheet.

[0065] like Figure 1 As shown, the first prism layer 111 has (multiple) protruding structures extending along the first extension direction, the second prism layer 112 has (multiple) protruding structures extending along the second extension direction, the third prism layer 113 has (multiple) protruding structures extending along the third extension direction, and the fourth prism layer 114 has (multiple) protruding structures extending along the fourth extension direction. In some embodiments, the (multiple) protruding structures of the above-mentioned prism layers are, for example, facing the display panel 102. For example, a protruding structure, such as Figure 1 The triangular prism-shaped protrusion structure shown is a triangular prism-shaped protrusion structure, so a prism layer can have multiple protrusion structures. In some embodiments, the triangular prism-shaped protrusion structure is, for example, a triangular prism-shaped protrusion structure with a triangular vertex angle between 70 degrees and 110 degrees, for example, a triangular vertex angle of 90 degrees.

[0066] In some embodiments, the angle between the first extension direction and the X-axis direction may be between 0 and 90 degrees (0≦angle≦90 degrees). The X-axis direction is, for example, defined as the direction in which the light emitting units 108 are arranged.

[0067] In some embodiments, the first extension direction and the second extension direction are, for example, the same or different. In some embodiments, when the first extension direction is different from the second extension direction, the angle between the first extension direction and the second extension direction may be between 1 degree and 90 degrees (1 degree ≦ angle ≦ 90 degrees). In some embodiments, the third extension direction and the first extension direction (or the second extension direction) may be, for example, the same or different. In some embodiments, the angle between the third extension direction and the second extension direction (or the first extension direction) is between 1 degree and 90 degrees (1 degree ≦ angle ≦ 90 degrees). In some embodiments, the fourth extension direction and the first extension direction (or at least one of the second extension direction and the third extension direction) may be, for example, the same or different. In some embodiments, the extension directions of the protruding structures of two adjacent prism layers may be, for example, orthogonal to each other, but are not limited thereto. In some embodiments, the extension directions of the protruding structures of two adjacent prism layers may be, for example, the same.

[0068] like Figure 1 As shown, the first extension direction is, for example, parallel to the X-axis direction, the second extension direction is, for example, orthogonal to the first extension direction (i.e., parallel to the Y-axis direction), the third extension direction is, for example, orthogonal to the second extension direction, and the fourth extension direction is orthogonal to the third extension direction, but is not limited thereto. In other embodiments, the first extension direction is, for example, parallel to the Y-axis direction. In other embodiments, the first extension direction is, for example, different from the Y-axis direction and the X-axis direction.

[0069] By disposing a plurality of prism layers (equal to or greater than four prism layers), the brightness uniformity of the display device 100 can be improved. Figure 2 As shown, part of the light emitted by the light emitting unit 108 (eg, 40% to 60% of all the light) may be reflected by the prism layer (eg, Figure 2 As shown by the arrow in the figure, by reflecting the light between the optical film group 110 and the first surface 1061, the brightness uniformity of the light incident on the display panel 102 can be improved, thereby improving the brightness uniformity of the display device 100.

[0070] By setting the above-mentioned multiple prism layers, the configuration of the cavity height of the display device can be reduced. In some embodiments, multiple prism layers can be stacked directly on the light-emitting unit 108, and because the prism layer may have slight waving, part of it contacts the light-emitting unit 108, and part of it does not contact the light-emitting unit 108, so that there is a second distance D2 between the structure surface 1085 and the optical film group 110. In some embodiments, the multiple light-emitting units 108 are not cut on the same plane (a plane substantially parallel to the first surface 1061), so some of the light-emitting units 108, for example, contact the optical film group 110, and some of the light-emitting units 108, for example, do not contact the light-emitting unit 108, so that there is a second distance D2 between the structure surface 1085 of the light-emitting unit 108 and the optical film group 110. In detail, there is a second distance D2 (i.e., the cavity height) between the structure surface 1085 and the optical film group 110 along the Z-axis direction. The second distance D2 may be defined as the minimum distance between the structure surface 1085 and the optical film set 110 along the Z-axis direction. In some embodiments, when the structure surface 1085 is a flat surface (i.e., the structure surface 1085 is, for example, substantially parallel to the first surface 1061), the second distance D2 may be defined as the minimum distance between the roughly central portion of the structure surface 1085 and the optical film set 110 along the Z-axis direction, but is not limited to the central portion of the structure surface 1085. In some embodiments, when the structure surface 1085 is, for example, an arc-shaped surface, a double hillside-shaped surface, or other irregular-shaped surfaces, the second distance D2 may be, for example, defined as the minimum distance between the relatively convex portion of the structure surface 1085 and the optical film set 110 along the Z-axis direction, but is not limited thereto.

[0071] In some embodiments, the second distance D2 is, for example, between 0 mm and 1 mm (0 mm≦second distance D2≦1 mm). In some embodiments, the second distance D2 is, for example, between 0 mm and 0.5 mm (0 mm≦second distance D2≦0.5 mm). In some embodiments, the second distance D2 is, for example, between 0 mm and 0.3 mm (0 mm≦second distance D2≦0.3 mm).

[0072] In addition, there may be a first distance D1 between the first surface 1061 and the display panel 102. The first distance D1 may be defined as the minimum distance between the first surface 1061 and the display panel 102 in the normal direction (Z-axis direction) of the substrate 106. In some embodiments, the first distance D1 is, for example, between 0.8 mm and 9 mm (0.8 mm≦first distance D1≦9 mm). In some embodiments, the first distance D1 is, for example, between 0.8 mm and 5 mm (0.8 mm≦first distance D1≦5 mm). In some embodiments, the first distance D1 is, for example, between 0.8 mm and 3 mm (0.8 mm≦first distance D1≦3 mm).

[0073] In addition, two adjacent light-emitting units 108 have a spacing Dp between each other, for example, and the spacing Dp is defined as the distance between the center points of the two adjacent light-emitting units 108 or the upper sides, lower sides, left sides, or right sides of the two adjacent light-emitting units 108. In some embodiments, the spacing Dp is between 0.6 mm and 5 mm (0.6 mm≦spacing Dp≦5 mm), for example, 1 mm, but not limited to this. The spacing Dp can be determined according to actual design requirements. In some embodiments, the ratio of the second distance D2 to the spacing Dp can be between 0.1 and 1 (0.1≦D2 / Dp≦1). In some embodiments, the ratio of the second distance D2 to the spacing Dp can be between 0.5 and 1 (0.5≦D2 / Dp≦1). In some embodiments, the ratio of the second distance D2 to the spacing Dp can be between 0.3 and 1 (0.3≦D2 / Dp≦1). In addition, if Figure 1 and Figure 2 As shown, the optical film set 110 is disposed between the light emitting unit 108 and the display panel 102. There is a third distance D3 between the first surface 1061 and the optical film set 110 in the normal direction of the substrate 106 (e.g., the Z-axis direction). The third distance can be defined as the minimum distance between the first surface 1061 and the optical film set 110 along the Z-axis direction. In some embodiments, the third distance D3 is, for example, between 0.4 mm and 2 mm (0.4 mm≦the third distance D3≦2 mm), but is not limited thereto. In some embodiments, the third distance D3 is, for example, between 0.4 mm and 1 mm (0.4 mm≦the third distance D3≦1 mm).

[0074] In addition, in some embodiments, the prism layer may be a brightness enhancement film, but is not limited thereto. In some embodiments, part of the prism layer may also be replaced by an optical film having a microstructure, for example. The above-mentioned microstructure, for example, has a plurality of protrusions, and the protrusions may be circular, elliptical, wavy, or other shapes, but is not limited thereto. The optical film having a microstructure, for example, has the effect of reflecting part of the light (or scattering the light).

[0075] In addition, in some embodiments, a reflective element may be disposed on the first surface 1061 of the substrate 106, and the reflective element is used to reflect light or change the path of light. The reflective element may, for example, include a material with high reflectivity (including white paint, metal paint, reflective particles, or other materials with reflective properties). The reflective particles may have different particle sizes or different materials, or may be a composite material, such as titanium dioxide (TiO2), silicon dioxide (SiO2), aluminum oxide (Al2O3) or zinc oxide (ZnO), but are not limited thereto.

[0076] Figure 3 : is a schematic diagram of the structure of a display device 200 according to another embodiment of the present disclosure. The display device 200 is similar in structure to the aforementioned display device 100, except that the display device 200 includes an optical integration element 130, and the optical integration element 130 is disposed between the substrate 106 and the diffuser 120. The optical integration element 130, for example, includes two (or more) prism layers, and an adhesive layer is provided between two adjacent prism layers, for example, to integrate the two (or more) prism layers into an optical film, but is not limited thereto. In some embodiments, the optical integration element 130 may further include a diffuser layer or other suitable optical layer. In some embodiments, the extension directions of the protruding structures of two adjacent prism layers in the optical integration element 130 may, for example, be orthogonal to each other. In some embodiments, the extension directions of the protruding structures of two adjacent prism layers in the optical integration element 130 may, for example, be different or the same. The adhesive layer includes a light-transmitting material, such as an optically transparent adhesive, polyvinyl butyral resin (PVB), ethylene vinyl acetate hot melt adhesive (EVA), other suitable materials, or a combination thereof, but not limited thereto.

[0077] In some embodiments, the thickness of the optical integration element 130 is, for example, less than or equal to 1.5 mm, but is not limited thereto, and optical integration elements 130 of different thicknesses may be selected according to needs. Figure 3 As shown, the optical film set 110 (optical integration element 130) is, for example, in contact with the packaging structure 1081 (e.g., structure surface 1085) of the light-emitting unit 108, that is, the second distance D2 is approximately between 0 mm and 0.3 mm (0 mm≦second distance D2≦0.3 mm), which can reduce the overall thickness (thickness on the Z axis) of the display device 200. It should be noted that the above contact is not limited to the optical film set 110 being in full contact with the packaging structure 1081 of the light-emitting unit 108, and the optical integration element 130 (or optical film set 110) may have an air layer between part of the packaging structure 1081 of the light-emitting unit 108. In some embodiments, the optical film set 110 is, for example, not in contact with the packaging structure 1081.

[0078] In addition, if Figure 3 As shown, there is a distance d between the light-emitting chip 1083 and the structural surface 1085. The light emitted by the light-emitting chip 1083 can, for example, pass through the structural surface 1085 of the packaging structure 1081 and be reflected by the optical film group 110 (as shown by the arrow) to the first surface 1061 of the substrate 106. After (multiple) reflections, the brightness uniformity of the light entering the display panel 102 is improved.

[0079] In addition, the positions of the optical integration element 130, the third prism layer 113, and the fourth prism layer 114 in the display device 200 can be interchanged as appropriate. In some embodiments, the third prism layer 113 and the fourth prism layer 114 can be disposed between the diffuser 120 and the substrate 106, and the optical integration element 130 can be disposed between the diffuser 120 and the display panel 102, but is not limited thereto. In some embodiments, the optical film set 110 can include two (or more) optical integration elements 130, and the diffuser 120 can be disposed between the two optical integration elements 130.

[0080] Figure 41 is a schematic diagram of the structure of a display device 200' according to another embodiment of the present disclosure. The display device 200' is similar in structure to the display device 200, except that the light-emitting unit 108 of the display device 200' may not have the encapsulation structure 1081, and the light-emitting chip 1083 has a light-emitting surface ES facing the display panel 102. When the light-emitting unit 108 does not have the encapsulation structure 1081, a filling element FE is provided between the light-emitting chips 1083, for example, and a portion of the light-emitting chip 1083 (for example, the light-emitting surface ES of the light-emitting chip 1083) is not covered by the filling element FE. At this time, there is a fourth distance D4 between the light-emitting surface ES of the light-emitting chip 1083 and the optical film group 110. The fourth distance D4 is defined as, for example, the minimum distance between the light-emitting surface ES of the light-emitting chip 1083 and the optical film group 110 along the Z-axis direction. In some embodiments, the light emitting surface ES may be defined as the surface of one of the elements (p-type semiconductor, quantum well layer, n-type semiconductor, anode electrode, cathode electrode) of the light emitting chip 1083 that is farthest from the substrate 106, but is not limited thereto. The quantum well layer includes a single quantum well (SQW) or a multiple quantum well (MQW). In some embodiments, the filling element FE is, for example, disposed adjacent to the sidewall of the light emitting chip 1083. In some embodiments, when the light emitting unit 108 does not have the packaging structure 1081, and the filling element FE is not disposed between the light emitting chips 1083, for example, there is an air layer between the light emitting chips 1083, then there is a fourth distance D4 between the light emitting surface ES of the light emitting chip 1083 and the optical film set 110. In some embodiments, the fourth distance D4 is approximately between 0 mm and 1 mm (0 mm≦fourth distance D4≦1 mm), but is not limited thereto. In some embodiments, the fourth distance D4 is approximately between 0 mm and 0.3 mm (0 mm≦fourth distance D4≦0.3 mm). In some embodiments, the optical film set 110 (optical integration element 130), for example, contacts the light emitting chip 1083 (e.g., light emitting surface ES) of the light emitting unit 108, which can reduce the overall thickness (thickness on the Z axis) of the display device 200. It should be noted that the above-mentioned contact is not limited to the optical film set 110 being in full contact with the light emitting chip 1083, and there may be an air layer between a part of the optical integration element 130 and the light emitting chip 1083. In some embodiments, the optical film set 110, for example, has no contact with the light emitting chip 1083. The material of the filling element FE, for example, includes a material with transparent properties, a material with heat-resistant properties, a material with reflective properties, or a combination thereof, but is not limited thereto.The material of the filling element FE may include epoxy, silicone, optical clear adhesive (OCA), anisotropic conductive film (ACF), anisotropic conductive paste (ACP), non-conductive film (NCF), non-conductive paste (NCP), photoresist, other suitable materials or combinations thereof, but are not limited thereto. In some embodiments, when the filling element FE is a transparent material, the filling element FE may be, for example, at least partially disposed on the light emitting chip 1083. In short, the substrate 106 and the optical film set 110 may be separated by the packaging structure 1081, the filling element FE, the air layer or other elements to design a light mixing space (such as the third distance D3) between the substrate 106 and the optical film set 110.

[0081] Figure 5 1 is a schematic diagram of the structure of a display device 300 according to another embodiment of the present disclosure. The structure of the display device 300 is similar to that of the aforementioned display device 100, except that the display device 300 further includes a fifth prism layer 115 disposed between the display panel 102 and the fourth prism layer 114, and the diffuser 120 is disposed, for example, between the first prism layer 111 and the light-emitting unit 108, but is not limited thereto. In other embodiments, the diffuser 120 may be disposed between any two adjacent prism layers or between the prism layer and the display panel 102. The fifth prism layer 115 may have (multiple) protruding structures, and the extension direction (e.g., the fifth extension direction) of the protruding structure of the fifth prism layer 115 is different from the fourth extension direction of the protruding structure of the fourth prism layer 114. In some embodiments, the angle between the fifth extension direction and the fourth extension direction is approximately between 1 and 90 degrees (1 degree ≦ angle ≦ 90 degrees). In some embodiments, the fifth extension direction is the same as the fourth extension direction. By disposing more prism layers, the brightness uniformity of the display device 300 can be improved.

[0082] Figure 6: is a schematic diagram of the structure of a display device 400 according to another embodiment of the present disclosure. The structure of the display device 400 is similar to that of the aforementioned display device 300, except that the display device 400 further includes a sixth prism layer 116, which is disposed between the display panel 102 and the fifth prism layer 115. Among them, the sixth prism layer 116 may have (multiple) protruding structures, and the extension direction (e.g., the sixth extension direction) of the protruding structure of the sixth prism layer 116 is different from the fifth extension direction. In some embodiments, the angle between the sixth extension direction and the fifth extension direction is approximately between 1 and 90 degrees (1 degree ≦ angle ≦ 90 degrees). In some embodiments, the fifth extension direction is the same as the sixth extension direction. By providing more prism layers, the brightness uniformity of the display device 400 can be improved.

[0083] Figure 7 FIG. 5 is a schematic diagram of a display device 500 according to another embodiment of the present disclosure. The display device 500 is similar in structure to the display device 100 described above, except that the diffuser 120 in the display device 500 is disposed between the display panel 102 and the fourth prism layer 114. This design can reduce interference fringes.

[0084] Figure 8 FIG. 6 is a schematic diagram of the structure of a display device 600 according to another embodiment of the present disclosure. The structure of the display device 600 is similar to that of the aforementioned display device 100, except that the display device 600 further includes another diffuser 140 disposed between the substrate 106 and the first prism layer 111. By disposing the diffuser 140 between the substrate 106 and the first prism layer 111, the light is dispersed by the diffuser 140 before entering the first prism layer 111, thereby improving the brightness uniformity of the display device 400, and the diffuser 120 is disposed to help reduce interference fringes.

[0085] Fig. 9: is a three-dimensional exploded view of a display device 800 according to another embodiment of the present disclosure. The structure of the display device 800 is similar to that of the display device 100, except that the first extension direction of the protruding structure of the first prism layer 111A in the display device 800 is different from the X-axis direction. In some embodiments, the angle between the first extension direction and the X-axis direction may be between 1 degree and 90 degrees (1 degree ≦ angle ≦ 90 degrees). In some embodiments, the first extension direction is the same as or different from the second extension direction of the protruding structure of the second prism layer 112A. When the first extension direction is different from the second extension direction, the angle between the first extension direction and the second extension direction may be between 1 degree and 90 degrees (1 degree ≦ angle ≦ 90 degrees). In some embodiments, the third extension direction of the protruding structure of the third prism layer 113 may be, for example, the same as or different from the first extension direction (or the second extension direction). In some embodiments, the fourth extension direction of the protruding structure of the fourth prism layer 114 may be, for example, the same as or different from the first extension direction (the second extension direction or the third extension direction). For example, Fig. 9 The angle between the first extension direction and the X-axis direction is about 45 degrees, the first extension direction and the second extension direction are, for example, orthogonal to each other, the angle between the second extension direction and the third extension direction is about 45 degrees, and the third extension direction and the fourth extension direction are, for example, orthogonal to each other, but the present disclosure is not limited thereto. The angle relationship between the extension directions of the above-mentioned different prism layers can be modulated as needed. In summary, an embodiment of the present disclosure provides a display device, and the display device is, for example, a straight-down display device, including a display panel 102 and a backlight module 104. Among them, the backlight module 104 includes an optical film group 110, having four or more prism layers, and the optical film group 110 is arranged between the display panel 102 and the substrate 106. The brightness uniformity of the display device is improved by arranging four or more prism layers.

[0086] Through the design disclosed in the present invention, the distance between the optical film group 110 and the light-emitting unit 108 can be approximately between 0 mm and 1 mm (0 mm ≦ the distance between the optical film group 110 and the light-emitting unit 108 ≦ 1 mm), or the distance between the first surface 1061 and the display panel 102 can be approximately between 0.8 mm and 9 mm (0.8 mm ≦ the distance between the first surface 1061 and the display panel 102 ≦ 9 mm), which can reduce the overall thickness of the display device and is conducive to the design of a thin display device.

[0087] The embodiments of the present disclosure and their advantages are disclosed as above, but it should be understood that any person skilled in the art can make changes, substitutions and modifications without departing from the spirit and scope of the present disclosure. In addition, the scope of protection of the present disclosure is not limited to the processes, machines, manufactures, material compositions, devices, methods and steps in the specific embodiments described in the specification. Any person skilled in the art can understand the current or future developed processes, machines, manufactures, material compositions, devices, methods and steps from the disclosure of the present disclosure, as long as they can implement substantially the same functions or obtain substantially the same results in the embodiments described herein, they can all be used according to the present disclosure. Therefore, the scope of protection of the present disclosure includes the above-mentioned processes, machines, manufactures, material compositions, devices, methods and steps. In addition, each claim constitutes an individual embodiment, and the scope of protection of the present disclosure also includes the combination of each claim and embodiment.

Claims

1. A display device, characterized in that: include: a display panel; as well as A backlight module is provided corresponding to the display panel, and the backlight module comprises: A substrate having a first surface, and the first surface is disposed toward the display panel; A plurality of light emitting units are disposed on the first surface; an optical film set, disposed between the plurality of light-emitting units and the display panel, the optical film set having a plurality of prism layers; a diffusion sheet disposed between two of the plurality of prism layers; and A filling element is disposed between the substrate and the optical film set, and the filling element comprises a transparent material, wherein the filling element contacts the side walls of the light-emitting units but does not contact the upper surfaces of the light-emitting units; The first surface and the display panel have a first distance, and the first distance is between 0.8 mm and 9 mm; There is an air layer between the upper surfaces of the light-emitting units and the optical film set.

2. The display device according to claim 1, wherein: The plurality of light-emitting units respectively have a packaging structure, the packaging structure has a structural surface facing the display panel, a second distance is provided between the structural surface and the optical film set, and the second distance is between 0 mm and 1 mm.

3. The display device according to claim 1, wherein: There is a third distance between the first surface and the optical film set, and the third distance is between 0.4 mm and 2 mm.

4. The display device according to claim 1, wherein: The plurality of light-emitting units respectively have a light-emitting chip, the light-emitting chip has a light-emitting surface facing the display panel, a fourth distance is located between the light-emitting surface and the optical film set, and the fourth distance is between 0 mm and 1 mm.

5. The display device according to claim 4, characterized in that The filling element is disposed adjacent to the light emitting chip.

6. The display device according to claim 1, wherein: The number of the plurality of prism layers is greater than or equal to four.

7. The display device according to claim 6, characterized in that The plurality of prism layers respectively have a protruding structure, and the protruding structure is arranged toward the display panel.

8. The display device according to claim 6, wherein: An adhesive layer is disposed between two adjacent prism layers.

9. The display device according to claim 1, wherein: The multiple prism layers include a first prism layer, a second prism layer and a third prism layer, and the multiple prism layers are arranged in sequence, wherein the first prism layer is farthest from the display panel, the second prism layer has a protruding structure extending along a second extension direction, and the third prism layer has a protruding structure extending along a third extension direction, wherein an angle between the second extension direction and the third extension direction is between 1 and 90 degrees.

Images