Display device

Abstract

The invention provides a display device which comprises a first optical layer, a plurality of first light sources, a light modulation layer, a second optical layer and a plurality of second light sources. The plurality of first light sources is disposed adjacent to the first optical layer. The light modulation layer is disposed on the first optical layer. The second optical layer is disposed on the light modulation layer and includes a plurality of particles. The plurality of second light sources is disposed adjacent to the second optical layer. In the first mode, the second light sources are turned off, and the first light sources are turned on to emit first light to pass through the first optical layer, the light modulation layer and the second optical layer. In the second mode, the second light sources are turned on to emit second light to pass through the second optical layer, and the first light sources are turned on to emit first light to pass through the first optical layer, the light modulation layer and the second optical layer. In a front view, the first light sources are arranged in the first direction, the second light sources are arranged in the second direction, and the first direction is perpendicular to the second direction.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to an electronic device, and more particularly, to a display device. BACKGROUND

[0002] The light emitting surface of a conventional light guide plate can improve light uniformity by microstructure design. However, the light emitting surface is prone to visible mura defects due to the microstructure design, which adversely affects the overall optical taste. In addition, the two backlights overlapped in the conventional dual-backlight module interfere with each other, and cannot exhibit good optical effects and / or taste. SUMMARY

[0003] The present disclosure provides a display device capable of improving optical effects and / or taste.

[0004] According to some embodiments of the present disclosure, a display device includes a first optical layer, a plurality of first light sources, a light modulation layer, a second optical layer, and a plurality of second light sources. The plurality of first light sources is disposed adjacent to the first optical layer. The light modulation layer is disposed on the first optical layer. The second optical layer is disposed on the light modulation layer and includes a plurality of microparticles. The plurality of second light sources is disposed adjacent to the second optical layer. In a first mode, the plurality of second light sources is turned off, and the plurality of first light sources is turned on to emit first light through the first optical layer, the light modulation layer, and the second optical layer. In a second mode, the plurality of second light sources is turned on to emit second light through the second optical layer, and the plurality of first light sources is turned on to emit the first light through the first optical layer, the light modulation layer, and the second optical layer. In an elevation view, the plurality of first light sources is arranged along a first direction, the plurality of second light sources is arranged along a second direction, and the first direction is perpendicular to the second direction.

[0005] According to some other embodiments of the present disclosure, a display device is disposed in a transportation device and includes a first optical layer, a plurality of first light sources, a light modulation layer, a second optical layer, and a plurality of second light sources. The plurality of first light sources is disposed adjacent to the first optical layer. The light modulation layer is disposed on the first optical layer. The second optical layer is disposed on the light modulation layer and has a first side and a second side opposite to the first side. The plurality of second light sources is disposed adjacent to the first side of the second optical layer. In a first mode, the plurality of second light sources is turned off, and the plurality of first light sources is turned on to emit first light through the first optical layer, the light modulation layer, and the second optical layer. In a second mode, the plurality of second light sources is turned on to emit second light through the second optical layer, and the plurality of first light sources is turned on to emit the first light through the first optical layer, the light modulation layer, and the second optical layer. A distance from the first side to a driver seat of the transportation device is greater than a distance from the second side to the driver seat of the transportation device.

[0006] In order to make the above features and advantages of the present disclosure more apparent, the following embodiments are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 is a front view schematic of a display device according to some embodiments of the present disclosure;

[0008] Figure 2A shows Figure 1 a cross-sectional view along section line I-I' of the display device of

[0009] Figure 2B and Figure 2C shows Figure 1 a cross-sectional view along section line II-II' of the display device of

[0010] Figure 3A and Figure 3B are respectively Figure 1 front view schematics of a first brightness enhancement film and a second brightness enhancement film in

[0011] Figure 3C is Figure 3A a stack schematic of the first brightness enhancement film in Figure 3B and the second brightness enhancement film in

[0012] Figure 4 and Figure 5 are respectively Figure 1 two cross-sectional view schematics of a first brightness enhancement film and a second brightness enhancement film in

[0013] Figure 6 is Figure 1 a cross-sectional view schematic of a light modulating layer in

[0014] Figure 7 and Figure 8 are respectively front view schematics of two display devices according to further embodiments of the present disclosure;

[0015] Figure 9 and Figure 10 are respectively exploded view schematics of two display devices according to yet further embodiments of the present disclosure. DETAILED DESCRIPTION

[0016] Reference will now be made in detail to exemplary embodiments of the application, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used in the drawings and the description to refer to the same or like parts.

[0017] Throughout the specification and claims of this disclosure certain terms will be used consistently and are defined as follows: "coupled" means the joining, adhering, connecting, attaching, or the like, of two or more elements; whether mechanical, electrical, chemical, hydraulic, or otherwise; "connected" means the joining, adhering, connecting, attaching, or the like, of two or more elements; whether mechanical, electrical, chemical, hydraulic, or otherwise; "directly connected" means the joining, adhering, connecting, attaching, or the like, of two or more elements without any intermediary members; "indirectly connected" means the joining, adhering, connecting, attaching, or the like, of two or more elements with one or more intermediary members; "in communication with" means the exchange of information, as through electrical means, chemical means, physical means, electromagnetic means, or the like; "over" means adjacent to; above; and / or parallel to; "on" means in contact with, connected to, and / or adjacent to; "directly on" means in contact with; connected to; and / or adjacent to without any intermediary members; "indirectly on" means in contact with; connected to; and / or adjacent to with one or more intermediary members; and "end" and "portion" mean a part of a thing with distinct features.

[0018] Directional phrases used herein, such as "upper," "lower," "front," "back," "left," "right," and the like, are made only with reference to the position of the figures as shown in the drawings. The directional phrases are used for purposes of illustration and are not meant to limit the scope of the disclosure. In the drawings, like numerals are used to indicate similar components throughout the several views. The relative dimensions, thicknesses, and locations of the various film layers, regions, and / or structures can be exaggerated or shrunk for the sake of clarity.

[0019] As used herein, the term "on" or "over" one structure (or layer, element, substrate) means that the other structure (or layer, element, substrate) is adjacent to and in contact with the one structure (or layer, element, substrate). As used herein, the term "on" or "over" one structure (or layer, element, substrate) can also mean that the other structure (or layer, element, substrate) is adjacent to the one structure (or layer, element, substrate) without being in contact with the one structure (or layer, element, substrate). As used herein, the term "on" or "over" one structure (or layer, element, substrate) can also mean that the other structure (or layer, element, substrate) is adjacent to the one structure (or layer, element, substrate) with at least one intervening structure (or intervening layer, intervening element, intervening substrate, intervening space) between the other structure (or layer, element, substrate) and the one structure (or layer, element, substrate). As used herein, the term "on" or "over" one structure (or layer, element, substrate) can also mean that the other structure (or layer, element, substrate) is adjacent to the one structure (or layer, element, substrate) with at least one intervening structure (or intervening layer, intervening element, intervening substrate, intervening space) between the other structure (or layer, element, substrate) and the one structure (or layer, element, substrate). As used herein, the term "on" or "over" one structure (or layer, element, substrate) can also mean that the other structure (or layer, element, substrate) is adjacent to the one structure (or layer, element, substrate) with at least one intervening structure (or intervening layer, intervening element, intervening substrate, intervening space) between the other structure (or layer, element, substrate) and the one structure (or layer, element, substrate).

[0020] The phrases "between X and Y," "between about X and Y," "between approximately X and Y," and the like where X and Y are numbers can mean that the range includes the numbers X and Y and any other numbers between X and Y.

[0021] As used herein, the terms "first," "second," and the like, do not imply any ordinal, sequential, or hierarchical relationship between the enumerated items. As used herein, the terms "first," "second," and the like, are used merely as labels to distinguish one element from another element, and do not necessarily indicate any sequence or order in which such elements are to be performed or executed. The use of the terms "first," "second," and the like is interchangeable, and does not imply any order or sequence in which such elements are to be performed or executed. Accordingly, the use of "first," "second," and the like in the claims does not limit the scope of the claims to only the order or sequence described in the claims.

[0022] The electrical connection or coupling described in the present disclosure can refer to direct connection or indirect connection. In the case of direct connection, the end points of two circuit elements are directly connected or connected to each other by a conductor segment. In the case of indirect connection, there are switches, diodes, capacitors, inductors, resistors, other suitable elements, or combinations of the above elements between the end points of two circuit elements, but not limited thereto.

[0023] In the present disclosure, the measurement of thickness, length, and width can be obtained by optical microscope (OM), and the thickness or width can be measured by cross-sectional images in an electron microscope, but not limited thereto. In addition, there can be a certain error between any two values or directions used for comparison. In addition, the phrase "a given range is a first value to a second value", "a given range falls within a range of a first value to a second value" or "a given range is between a first value to a second value" means that the given range includes the first value, the second value and other values between them. If the first direction is perpendicular to the second direction, the angle between the first direction and the second direction can be between 80 degrees and 100 degrees; if the first direction is parallel to the second direction, the angle between the first direction and the second direction can be between 0 degrees and 10 degrees.

[0024] The term "about", "equal to", "equal" or "same", "substantially" or "approximately" is generally interpreted as within 20% of the given value or range, or within 10%, 5%, 3%, 2%, 1% or 0.5% of the given value or range.

[0025] 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 this disclosure belongs. It will be understood that terms such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and should not be interpreted in an idealized or overly formal sense unless expressly so defined in the embodiments of the present disclosure.

[0026] In the disclosure, the electronic device can include a display device, a backlight device, an antenna device, a packaging device, a sensing device, or a tiled device, but is not limited thereto. The electronic device can be a foldable or flexible electronic device. The display device can be a non-self-emissive display device or a self-emissive display device. The display device may, for example, include liquid crystals, light emitting diodes, fluorescence, phosphor, quantum dots (QD), other suitable display media, or a combination of the foregoing. The antenna device may, for example, include a Reconfigurable Intelligent Surface (RIS), a Frequency Selective Surface (FSS), an RF-Filter, a Polarizer, a Resonator, or an Antenna, etc. The antenna can be a liquid crystal type antenna or a Varactor Diodes antenna. The sensing device can be a sensing device that senses capacitance, light, heat energy, or ultrasound, but is not limited thereto. In the disclosure, the electronic device can include electronic elements, which can include passive elements and active elements, such as capacitors, resistors, inductors, diodes, transistors, etc. The diode can include a light emitting diode, a Varactor Diodes, or a photodiode. The light emitting diode may, for example, include an organic light emitting diode (OLED), a mini LED, a micro LED, or a quantum dot LED, but is not limited thereto. The tiled device may, for example, be a display tiled device or an antenna tiled device, but is not limited thereto. It is noted that the electronic device can be any arrangement combination of the foregoing, but is not limited thereto. The packaging device can be a packaging device suitable for a Wafer-Level Package (WLP) technology or a Panel-Level Package (WLP) technology, such as a chip first process or a RDL first process. In addition, the electronic device can have a rectangular, circular, polygonal, shape with curved edges, or other suitable shape. The electronic device can have a driving system, a control system, a light source system, and other peripheral systems to support the display device, the antenna device, a wearable device (e.g., including augmented reality or virtual reality), a vehicle-mounted device (e.g., including an automobile windshield), or a tiled device.

[0027] In the present disclosure, the measurement of the luminous intensity can be measuring the position of the center point of the light emitting surface of the display device using a light detector, and the measured area can be a circular range with a diameter of about 2mm to 3mm, but is not limited thereto.

[0028] Figure 1 is a front view schematic diagram of a display device according to some embodiments of the present disclosure. Figure 2A shows Figure 1 is a cross-sectional view schematic diagram of the display device of Figure 2B and Figure 2C respectively show Figure 1 is a cross-sectional view schematic diagram of the display device of Figure 3A and Figure 3B respectively are Figure 1 are front view schematic diagrams of the first and second brightness enhancement films in

[0029] Figure 3C is a cross-sectional view schematic diagram of the first brightness enhancement film in Figure 3A and Figure 3B is a cross-sectional view schematic diagram of the second brightness enhancement film in Figure 4 and Figure 5 respectively are Figure 1 are two cross-sectional view schematic diagrams of the first and second brightness enhancement films in Figure 6 is a cross-sectional view schematic diagram of the light modulation layer in Figure 1 Figure 7 and Figure 8 respectively are front view schematic diagrams of two display devices according to other embodiments of the present disclosure. Figure 9 and Figure 10 respectively are exploded view schematic diagrams of two display devices according to yet other embodiments of the present disclosure. It should be understood that the following embodiments can be mixed and matched to create other embodiments without departing from the spirit of the present disclosure. Features from different embodiments can be combined, rearranged, and / or mixed and matched to create other embodiments.

[0030] Please refer to Figure 1 , Figures 2A-2C ​In some embodiments, as shown in FIG. 1, the display device 1 can include a first optical layer 10, a plurality of first light sources 11, a light modulation layer 12, a second optical layer 13, and a plurality of second light sources 14. The plurality of first light sources 11 is disposed adjacent to the first optical layer 10. The light modulation layer 12 is disposed on the first optical layer 11. The second optical layer 13 is disposed on the light modulation layer 12 and includes a plurality of microparticles 130. The plurality of second light sources 14 is disposed adjacent to the second optical layer 13. In a first mode, the plurality of second light sources 14 is turned off, and the plurality of first light sources 11 is turned on to emit first light rays LI through the first optical layer 10, the light modulation layer 12, and the second optical layer 13. In a second mode, the plurality of first light sources 11 is turned on to emit first light rays LI through the first optical layer 10, the light modulation layer 12, and the second optical layer 13, and the plurality of second light sources 14 is turned on to emit second light rays L2 through the second optical layer 13. In a front view (as shown in FIG. 1), the plurality of first light sources 11 is arranged along a first direction Dl, the plurality of second light sources 14 is arranged along a second direction D2, and the first direction Dl is perpendicular to the second direction D2. Figure 1

[0031] In detail, the first optical layer 10 can be used to transmit light. For example, the first optical layer 10 can include a light guide plate or a diffusion plate. The material of the first optical layer 10 includes, but is not limited to, glass or plastic, for example. The plastic can include polycarbonate (PC), polyimide (PI), polypropylene (PP), polyethylene terephthalate (PET), other suitable materials, or a combination of the foregoing, but is not limited thereto.

[0032] In the architecture where the first optical layer 10 is a light guide plate, as shown in FIG. 1, Figure 1 Figures 2A-2C The plurality of first light sources 11 can be arranged along the first direction Dl beside an incident surface SE10 of the first optical layer 10. The first light rays LI emitted by the plurality of first light sources 11 can enter the first optical layer 10 through the incident surface SE10 of the first optical layer 10 and be transmitted in a direction away from the plurality of first light sources 11 by total internal reflection (TIR). Figure 2A ​​The first light sources 11 are schematically shown to be disposed on the left side (e.g., the ground side of the display device 1) of the first optical layer 10, and the first light rays L1 entering the first optical layer 10 are transmitted in the second direction D2, but not limited thereto. In other embodiments, although not shown, the first light sources 11 can be disposed on the right side (e.g., the sky side of the display device 1) of the first optical layer 10, and the first light rays L1 entering the first optical layer 10 are transmitted in the opposite direction of the second direction D2. At least one of the upper surface (light exit surface) ST10 and the lower surface SB10 of the first optical layer 10 can be formed with a plurality of microstructures (not shown) to break total internal reflection, so that the first light rays L1 can be emitted from the upper surface ST10 of the first optical layer 10, thereby allowing the first light rays L1 passing through the display panel 18 to have a first light exit range (the first light exit range will be described below Figure 2B ), but not limited thereto. In some embodiments, the display device 1 can further include a reflective sheet 15. The reflective sheet 15 is disposed below the light guide plate (the first optical layer 10) to reflect the first light rays L1 emitted from the lower surface SB10 of the first optical layer 10 back into the light guide plate, thereby improving light utilization. The reflective sheet 15 can include a white reflective sheet or other light-reflecting film. In some embodiments, the first light sources 11 can be disposed on the ground side, the sky side, or a combination thereof of the display device 1.

[0033] In the architecture in which the first optical layer 10 is a diffusion plate, as shown in Figure 10 , the first light sources 11 can be arranged below the lower surface SB10 of the first optical layer 10 in the first direction D1 and the second direction D2. The first light rays L1 emitted by the first light sources 11 can enter the first optical layer 10 through the lower surface SB10 of the first optical layer 10 and be emitted through the upper surface ST10 of the first optical layer 10. At least one of the upper surface (light exit surface) ST10 and the lower surface SB10 of the first optical layer 10 can be formed with a plurality of microstructures (not shown) to improve the uniformity of the first light rays L1 emitted from the upper surface ST10 of the first optical layer 10, but not limited thereto.

[0034] The plurality of first light sources 11 can be configured to provide the first light rays L1. In some embodiments, the plurality of first light sources 11 comprises a plurality of light emitting elements, such as a plurality of light emitting diodes (LEDs), a plurality of organic light emitting diodes (OLEDs), a plurality of mini LEDs, a plurality of micro LEDs, or a plurality of quantum dot LEDs. The plurality of light emitting elements can be, for example, a plurality of single-color light emitting elements, such as a plurality of white light emitting elements or a plurality of blue light emitting elements, but the disclosure is not limited thereto. In an architecture where the plurality of light emitting elements are a plurality of blue light emitting elements, the display device can further comprise a light conversion layer (not shown). The light conversion layer can comprise, for example, a fluorescence, a phosphor, a quantum dot (QD), other suitable materials, a light filtering material (such as a color resist), or a combination thereof, but the disclosure is not limited thereto.

[0035] The plurality of first light sources 11 can be disposed adjacent to the first optical layer 10 can comprise a disposition relationship of the plurality of first light sources 11 and the first optical layer 10 on the same side, such as Figure 2A As shown, the plurality of first light sources 11 can be arranged along the first direction D1 next to the light entrance surface SE10 of the first optical layer 10. Alternatively, the plurality of first light sources 11 can be disposed adjacent to the first optical layer 10 can comprise a disposition relationship of the plurality of first light sources 11 and the first optical layer 10 on the upper and lower sides, such as Figure 10 As shown, the plurality of first light sources 11 can be arranged in an array along the first direction D1 and the second direction D2 and located below the first optical layer 10.

[0036] In some embodiments, as shown in FIG. 1A, the display device 1 can further comprise a first brightness enhancement film 16 and a second brightness enhancement film 17, and the second brightness enhancement film 17 can be disposed between the first brightness enhancement film 16 and the first optical layer 10. In some embodiments, as shown in FIG. 1A, the plurality of first light sources 11 can be disposed adjacent to the first brightness enhancement film 16. Figures 2A-2C As shown, the plurality of first light sources 11 can be arranged along the first direction D1 next to the light entrance surface SE10 of the first optical layer 10. Alternatively, the plurality of first light sources 11 can be disposed adjacent to the first optical layer 10 can comprise a disposition relationship of the plurality of first light sources 11 and the first optical layer 10 on the upper and lower sides, such as Figures 3A-3C As shown, the plurality of first light sources 11 can be arranged along the first direction D1 next to the light entrance surface SE10 of the first optical layer 10. Alternatively, the plurality of first light sources 11 can be disposed adjacent to the first optical layer 10 can comprise a disposition relationship of the plurality of first light sources 11 and the first optical layer 10 on the upper and lower sides, such as Figure 3CAn embodiment in which the included angle β between the plurality of first light adjusting structures 160 and the plurality of second light adjusting structures 170 (e.g., the included angle between the extending direction of the first light adjusting structures 160 and the extending direction of the second light adjusting structures 170) is 90 degrees is schematically shown, in which the plurality of first light adjusting structures 160 extend along the first direction D1 and are arranged along the second direction D2, and the plurality of second light adjusting structures 170 extend along the second direction D2 and are arranged along the first direction D1. In this design, the first brightness enhancement film 16 and the second brightness enhancement film 17 can provide light collecting and brightness enhancement effects in the second direction D2 and the first direction D1, respectively. However, it should be understood that the design parameters (e.g., number, extending direction, arrangement direction, pitch, cross-sectional shape, and / or top angle, etc.) of the plurality of light adjusting structures in each brightness enhancement film can be changed according to actual needs, and are not limited to Figures 3A-3C As shown in FIG. 1A, for example, the included angle β between the boundary line B160 between the plurality of first light adjusting structures 160 and the boundary line B170 between the plurality of second light adjusting structures 170 can be 80 to 100 degrees, but is not limited thereto. Figure 3C As shown in FIG. 1A, for example, the included angle β between the boundary line B160 between the plurality of first light adjusting structures 160 and the boundary line B170 between the plurality of second light adjusting structures 170 can be 80 to 100 degrees, but is not limited thereto.

[0037] In some embodiments, as shown in FIG. 1A, for example, the cross-sectional shape of the first brightness enhancement film 16 can be a prism sheet, the plurality of first light adjusting structures 160 of the first brightness enhancement film 16 can include a plurality of columnar prisms, and the pitch P160 of the plurality of columnar prisms can be between 20 μm and 60 μm. Figure 4 As shown in FIG. 1A, for example, the pitch P160 of the plurality of columnar prisms can be the distance between the two vertices of two adjacent columnar prisms. Alternatively, the pitch P160 of the plurality of columnar prisms can be the distance between the same side (e.g., left to left or right to right) of two adjacent columnar prisms. Figure 4 As shown in FIG. 1A, for example, the top angle α of the columnar prism can be between 1 degree and 175 degrees, but is not limited thereto. Figure 4 Figure 4 In some embodiments, as shown in FIG. 1A, for example, the cross-sectional shape of the first brightness enhancement film 16 can be a prism sheet, the plurality of first light adjusting structures 160 of the first brightness enhancement film 16 can include a plurality of columnar prisms, and the pitch P160 of the plurality of columnar prisms can be between 20 μm and 60 μm. As shown in FIG. 1A, for example, the pitch P160 of the plurality of columnar prisms can be the distance between the two vertices of two adjacent columnar prisms. Alternatively, the pitch P160 of the plurality of columnar prisms can be the distance between the same side (e.g., left to left or right to right) of two adjacent columnar prisms.

[0038] Figure 5 In some embodiments, as shown in FIG. 1A, for example, the cross-sectional shape of the first brightness enhancement film 16 can be a prism sheet, the plurality of first light adjusting structures 160 of the first brightness enhancement film 16 can include a plurality of columnar prisms, and the pitch P160 of the plurality of columnar prisms can be between 20 μm and 60 μm. Figure 5 As shown in FIG. 1A, for example, the pitch P160 of the plurality of columnar prisms can be the distance between the two vertices of two adjacent columnar prisms. Alternatively, the pitch P160 of the plurality of columnar prisms can be the distance between the same side (e.g., left to left or right to right) of two adjacent columnar prisms. Figure 5 As shown in FIG. 1A, for example, the pitch P160 of the plurality of columnar prisms can be the distance between the two vertices of two adjacent columnar prisms. Alternatively, the pitch P160 of the plurality of columnar prisms can be the distance between the same side (e.g., left to left or right to right) of two adjacent columnar prisms.

[0039] The structural design of the second brightness enhancement film 17 can refer to Figure 4 or Figure 5 ​The structural design of the first brightness enhancement film 16 is not repeated here. The first brightness enhancement film 16 and the second brightness enhancement film 17 can refract and / or reflect light through a plurality of columnar prisms or a plurality of columnar lenses, thereby correcting the transmission direction of light, concentrating light, recycling and utilizing light that is not utilized outside the viewing angle, and thus being able to improve the overall brightness and achieve the effect of brightness enhancement.

[0040] Please refer to Figures 2A-2C The light modulation layer 12 can be disposed between the first brightness enhancement film 16 and the second optical layer 13. In some embodiments, as shown in Figure 6 The light modulation layer 12 can include a plurality of partition structures 120, and the pitch P120 of the plurality of partition structures 120 is greater than 29 μm and less than 5 mm, for example. The pitch P120 of the plurality of partition structures 120 can be the distance between the centers of two adjacent partition structures 120, as shown in Figure 6 Alternatively, the pitch P120 of the plurality of partition structures 120 can be the distance between the same sides (e.g., left to left or right to right in a cross-sectional view) of two adjacent partition structures 120. The material of the plurality of partition structures 120 includes a light-absorbing material, but is not limited thereto. The plurality of partition structures 120 can allow light transmitted in a specific direction to pass through and absorb light transmitted in other directions, thereby achieving the effect of narrowing the viewing angle. In some embodiments, as shown in Figure 6 The plurality of partition structures 120 can be arranged in the first direction D1 and extend in the second direction D2 to provide the effect of narrowing the viewing angle in the first direction D1, but it should be understood that the design parameters (such as the number, extension direction, arrangement direction, pitch, and / or cross-sectional shape, etc.) of the plurality of partition structures 120 in the light modulation layer 12 can be changed according to actual needs, and are not limited to Figure 6

[0041] In some embodiments, as shown in Figure 6 The light modulation layer 12 can also include a substrate 122 and a substrate 124 opposite to the substrate 122, and the plurality of partition structures 120 are disposed between the substrate 122 and the substrate 124. The substrate 122 and the substrate 124 include a polycarbonate film or other suitable support substrate, but are not limited thereto.

[0042] Please refer to Figures 2A-2C ​The second optical layer 13 is disposed on the side of the light modulation layer 12 away from the first optical layer 10. The second optical layer 13 can be used to transmit light. For example, the second optical layer 13 may include a light guide plate. The material of the second optical layer 13 can be referred to the material of the first optical layer 10, and will not be repeated here. A plurality of second light sources 14 may be arranged along the second direction D2 next to the light incident surface SE13 of the second optical layer 13, but are not limited thereto. The second light rays L2 emitted by the plurality of second light sources 14 can enter the second optical layer 13 through the light incident surface SE13 of the second optical layer 13 and be transmitted away from the plurality of second light sources 14 by total internal reflection. Figure 2B The diagram schematically shows multiple second light sources 14 disposed on the right side of the second optical layer 13, with the second light ray L2 entering the second optical layer 13 propagating in the opposite direction to the first direction D1, but this is not a limitation. In other embodiments, although not shown, multiple second light sources 14 may be disposed on the left side of the second optical layer 13, with the second light ray L2 entering the second optical layer 13 propagating in the first direction D1. The second optical layer 13 can disrupt total internal reflection through multiple particles 130, allowing the second light ray L2 to exit from the upper surface ST13 (light-emitting surface) of the second optical layer 13, thereby giving the second light ray L2 passing through the display panel 18 a second light-emitting range (see [reference needed] for an explanation of the second light-emitting range). Figure 2C However, this is not a limitation. The material of the plurality of particles 130 may include plastic. The plurality of particles 130 may be substantially uniformly distributed within the second optical layer 13, for example, having the same or similar number of particles 130 within a specified volume of the second optical layer 13. In other embodiments, although not shown, at least one of the upper surface ST13 and the lower surface SB13 of the second optical layer 13 may be formed with a plurality of microstructures (not shown) to disrupt total internal reflection, allowing the second ray L2 to exit from the upper surface ST13 (light-emitting surface) of the second optical layer 13, wherein the plurality of microstructures on the upper surface ST13 are, for example, randomly distributed to improve moiré defects. On the other hand, the distribution of the plurality of microstructures on the lower surface SB13 can be designed according to actual needs and is not limited thereto. With an architecture in which at least one of the upper surface ST13 and the lower surface SB13 of the second optical layer 13 is formed with a plurality of microstructures, the second optical layer 13 may not include a plurality of particles 130. In some embodiments, the display device 1 may be mounted on a transport device, and the light-incident surface SE13 of the second optical layer 13 may be, for example, the side away from the driver. In other embodiments, the light-incident surface SE13 of the second optical layer 13 may be either side of the light-incident surface SE10 of the first optical layer 10 in a front view.

[0043] A plurality of second light sources 14 may be used to provide a second light ray L2. In some embodiments, the plurality of second light sources 14 include a plurality of light-emitting elements. The plurality of light-emitting elements may be, for example, a plurality of monochromatic light-emitting elements, such as a plurality of white light-emitting elements or a plurality of blue light-emitting elements, but are not limited thereto. In an architecture in which the plurality of light-emitting elements are a plurality of blue light-emitting elements, the display device may further include a light conversion layer (not shown).

[0044] The arrangement of multiple second light sources 14 adjacent to the second optical layer 13 can include a proximity arrangement of multiple second light sources 14 and the second optical layer 13 on the same horizontal plane, such as... Figure 2B As shown, multiple second light sources 14 can be arranged along the second direction D2 next to the light incident surface SE13 of the second optical layer 13.

[0045] Depending on the specific requirements, the display device 1 may selectively include other components or film layers. For example, the display device 1 may also include a display panel 18. The display panel 18 is disposed on the second optical layer 13. The display panel 18 may be, for example, a non-emissive display panel, such as a liquid crystal display panel, but is not limited thereto. Figure 1 The display area of ​​the display panel 18 is marked with a diagonal line, and the display area of ​​the display panel 18 overlaps the light modulation layer 12 in the thickness direction DT of the display panel 18.

[0046] In some embodiments, such as Figure 1 As shown, the display device 1 may further include a display panel 19 and a back plate 20, wherein the display panel 19 and the display panel 18 are arranged, for example, along a first direction D1 (e.g., a direction parallel to the horizontal plane) and are both mounted on the back plate 20. The display panel 19 may be a self-emissive display panel, but is not limited thereto. In other embodiments, the display panel 19 may be a non-self-emissive display panel, although not shown, and the display device 1 may further include a plurality of third light sources. In the top view, the plurality of third light sources may be disposed adjacent to one or more sides of the display panel 19, for example, the relative arrangement relationship between the plurality of third light sources and the display panel 19 may refer to the relative arrangement relationship between the display panel 18 and the plurality of first light sources 11, but is not limited thereto.

[0047] In some embodiments, the display device 1 is disposed, for example, in a transport device, and the second optical layer 13 has a first side S1 (such as the side where the light incident surface SE13 of the second optical layer 13 is located) and a second side S2 relative to the first side S1. A plurality of second light sources 14 are disposed adjacent to the first side S1 of the second optical layer 13, and as shown in the figure... Figure 1As shown, the distance from the first side S1 to the driver's seat (not shown) of the transport device is greater than the distance from the second side S2 to the driver's seat of the transport device. For example, display panel 19 may be a display panel in front of or adjacent to the driver's seat, while display panel 18 may be a display panel extending from in front of the passenger seat to between the driver's seat and the passenger seat, but is not limited thereto. In another embodiment, display device 1 can be viewed by multiple people, wherein display panel 19 provides a sharing mode, and display panel 18 can switch between a sharing mode and a privacy mode. Furthermore, the width of display panel 19 and display panel 18 in the horizontal direction (such as the first direction D1) and their horizontal arrangement order can be adjusted as needed.

[0048] By switching the display mode of the display device 1, the viewing angle of the display panel 18 can be controlled. For example, when the display device 1 is switched to privacy mode, the display panel 18 has a narrower viewing angle (including the first light emission range) to reduce interference with the driver. When the display device 1 is switched to share mode, the display panel 18 has a wider viewing angle (including both the first and second light emission ranges), allowing not only the passenger but also the driver to clearly see the display screen of the display panel 18. Specifically, the first mode and the second mode can be privacy mode and share mode, respectively. In the first mode (privacy mode), multiple second light sources 14 are turned off, and multiple first light sources 11 are turned on. The first light rays L1 from the multiple first light sources 11 are limited in their emission angle (e.g., the viewing angle in the first direction D1; see details in [link to documentation]). Figure 2B (and related descriptions). In the second mode (shared mode), multiple first light sources 11 and multiple second light sources 14 are all turned on. Since the multiple second light sources 14 and the second optical layer 13 are disposed above the light modulation layer 12, the second light rays L2 from the multiple second light sources 14 are not restricted in their emission angle by the light modulation layer 12 (for details, please refer to...). Figure 2C (and related descriptions).

[0049] Specifically, refer to Figure 2B as well as Figure 2C The first light ray L1 emitted from the display device 1 has a first light emission range. Figure 2B For the display device in the first mode along Figure 1 A cross-sectional view along section line II-II' shows that the first light ray L1 emitted by the first light source 11 has a first light-emitting range, which includes the first area R1 of the display panel 18 (see reference). Figure 1 ) Towards the third direction D3 near the plurality of second light sources 14 to the first area R1 of the display panel 18 (refer to) Figure 1 ) in a fourth direction D4 away from the plurality of second light sources 14. In one embodiment (e.g.)Figure 1 , Figure 9 When the display panel 18 and the light modulation layer 12 substantially overlap, the first region R1 can be, for example, the geometric center of the display panel 18; in another embodiment (e.g.) Figure 8 When the display panel 18 and the light modulation layer 12 partially overlap, the first region R1 can be, for example, the geometric center of the overlapping portion of the display panel 18 and the light modulation layer 12, but is not limited thereto. The third direction D3 and the fourth direction D4 each form a 20-degree angle with the normal direction DN of the first region R1, but are not limited thereto. On the other hand, Figure 2C For the display device in the second mode along Figure 1 The cross-sectional view along section II-II' shows that the second ray L2 emitted from the second light source 14 has a second emission range. This second emission range encompasses a fifth direction D5 extending away from the plurality of second light sources 14 from the first region R1 of the display panel 18 to a sixth direction D6 extending away from the plurality of second light sources 14 from the first region R1 of the display panel 18. The fifth direction D5 forms a 45-degree angle with the normal direction DN of the first region R1, and the sixth direction D6 forms an 80-degree angle with the normal direction DN of the first region R1, but is not limited to these directions. The emission range is the area or continuous range from which the light is emitted, allowing an observer or spectrometer to detect the light within this area or emission range.

[0050] Because in the first mode, multiple second light sources 14 are off and multiple first light sources 11 are on, while in the second mode, both multiple first light sources 11 and multiple second light sources 14 are on, the luminous intensity of the first area R1 of the display device 1 in the second mode can be greater than the luminous intensity of the first area R1 of the display device 1 in the first mode. The luminous intensity can be measured using a photodetector (such as a spectrometer) in the first area R1 of the display device 1. The measurement area can be a circular range with a diameter of approximately 2 mm to 3 mm, but is not limited to this. The unit of luminous intensity can be nits or candela per square meter (cd / m²). 2 However, this disclosure is not limited to this.

[0051] More specifically, in the first mode, a first light intensity can be measured within a first light emission range, and in the remaining ranges (refer to...) Figure 2B For example, within an angle range θ3 (21 to 90 degrees away from the second light source 14 and forming an angle range θ2 (21 to 90 degrees with the normal direction DN of the first region R1) and close to the second light source 14 (20 to 90 degrees with the normal direction DN of the first region R1), a first light intensity of less than 20% can be measured. Furthermore, in the second mode, a second light intensity can be measured within the first light emission range, and within the second light emission range, a second light intensity of 30% to 40% can be measured. Also in the second mode, between the first and second light emission ranges (refer to...) Figure 2CFor example, the second light intensity of 25% to 40% can be measured in the angle range θ1 which is away from the second light source 14 and is within the angle range of 20 degrees to 45 degrees with respect to the normal direction DN of the first region R1, while the second light intensity of less than 20% can be measured in the remaining range (refer to Figure 2C For example, the second light intensity of less than 20% can be measured in the angle range θ3 which is close to the second light source 14 and is within the angle range of 21 degrees to 90 degrees with respect to the normal direction DN of the first region R1.

[0052] Please refer to Figure 7 The main difference between the display device 1A and the display device 1 of Figure 1 will be described as follows. In the display device 1A, the display area (diagonal region) of the display panel 18 extends to the driving side, and the plurality of first light sources 11 are also arranged on one side of the display area at the driving side. Under this architecture, the display device 1A can not include the display panel 19 of Figure 1 . In addition, the length L12 of the light modulation layer 12 is less than the length LAA of the display area of the display panel 18. For example, the light modulation layer 12 can extend from the co-pilot side to the driving side, and the length L12 of the light modulation layer 12 can be one half to two thirds of the length LAA of the display area, i.e. (1 / 2)*LAA≤L12≤(2 / 3)*LAA.

[0053] Please refer to Figure 8 The main difference between the display device 1B and the display device 1 of Figure 1 will be described as follows. The display device 1B includes two display panels 18, and the display panel 19 and the two display panels 18 are arranged along the first direction D1. In addition, the plurality of first light sources 11 are arranged adjacent to one long side of each display panel 18, and the plurality of second light sources 14 are arranged adjacent to one short side of each display panel 18, but the positions of the plurality of first light sources 11 and the plurality of second light sources 14 are not limited thereto.

[0054] It should be understood that Figure 1 , Figure 7 , Figure 8 The relative arrangement relationship of the display panel 18, the plurality of first light sources 11 and the plurality of second light sources 14 in

[0055] Please refer to Figure 9The display device 1C includes, for example, a backplate 20, a bonding layer AD1, a reflector 15, a first optical layer 10, a first lamp bar LB1, a diffuser DF, a second brightness enhancement film 17, a first brightness enhancement film 16, a light modulation layer 12, a second optical layer 13, a second lamp bar LB2, a bonding layer AD2, and a display panel 18. The reflector 15 is attached to the backplate 20 via the bonding layer AD1. The bonding layer AD1 may include adhesive, tape, or other adhesive bonding materials. The first lamp bar LB1 is disposed adjacent to one side (e.g., the long side) of the first optical layer 10 and includes a plurality of first light sources 11 (see reference 1) arranged along a first direction D1. Figure 1 A diffuser DF is disposed between the first optical layer 10 and the second brightness enhancement film 17. A second light bar LB2 is disposed adjacent to one side (e.g., the short side) of the second optical layer 13 and includes a plurality of second light sources 14 (see reference 1) arranged along a second direction D2 (e.g., a direction perpendicular to the horizontal direction (such as the first direction D1)). Figure 1 The display panel 18 is attached to the second optical layer 13 via a bonding layer AD2. The bonding layer AD2 may include adhesive, tape, or other adhesive bonding materials. Although not shown, the display panel 18 may include an active element array substrate, a counter substrate opposite to the active element array substrate, and a liquid crystal layer disposed between the active element array substrate and the counter substrate. In some embodiments, although not shown, the display panel 18 may also include a color filter layer, wherein the color filter layer and the active element array substrate may be disposed on the same side or opposite side of the liquid crystal layer. In some embodiments, although not shown, the display panel 18 may also include an upper polarizer, a lower polarizer, and a cover plate, wherein the upper polarizer may be disposed on the surface of the counter substrate away from the liquid crystal layer and located between the cover plate and the liquid crystal layer, and the lower polarizer may be disposed on the surface of the active element array substrate away from the liquid crystal layer.

[0056] Please refer to Figure 10 The display device 1D includes, for example, a back panel 20, bonding layers AD3 and AD4, a lamp panel LB1', a reflector 15', bonding layer AD1, a first optical layer 10', a second brightness enhancement film 17, a first brightness enhancement film 16, a light modulation layer 12, a second optical layer 13, a second lamp strip LB2, bonding layer AD2, and a display panel 18. The lamp panel LB1' is attached to the back panel 20 via bonding layer AD3 and includes a plurality of first light sources 11 (not shown) arranged in an array along a first direction D1 and a second direction D2. Figure 10 Please refer to Figure 1). The bonding layer AD3 can include glue, tape or other bonding material with adhesion. The reflective sheet 15' is attached to the lamp panel LB1' by the bonding layer AD4 and includes a plurality of openings A15' respectively overlapping the plurality of first light sources 11 in the thickness direction DT. The bonding layer AD4 can include glue, tape or other bonding material with adhesion. The first optical layer 10' is attached to the reflective sheet 15' by the bonding layer AD1, and the first optical layer 10' can include a diffusion plate, a diffusion sheet or a combination thereof.

[0057] In summary, in the embodiments of the present disclosure, by the second optical layer including a plurality of microparticles with a light dispersing effect, the problem of moire defects is improved, and the optical taste is improved. In addition, under the architecture that the first optical layer and the second optical layer are overlapped, both backlights can exhibit good optical effects and / or taste and can assist each other to provide a composite optical effect.

[0058] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than limit them; although the foregoing embodiments of the present disclosure are described in detail, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

[0059] Although the embodiments of the present disclosure and their advantages have been disclosed as above, it should be understood that any person skilled in the art can make modifications, replacements and refinements without departing from the spirit and scope of the present disclosure, and the features of each embodiment can be arbitrarily mixed and replaced to form other new embodiments. In addition, the protection scope of the present disclosure is not limited to the processes, machines, manufactures, compositions of matter, means, methods and steps in the specific embodiments described in the specification, and any person skilled in the art can understand the current or future developed processes, machines, manufactures, compositions of matter, means, methods and steps from the disclosure, as long as they can substantially perform the same function or achieve substantially the same results as in the embodiments described herein. Therefore, the protection scope of the present disclosure includes the above processes, machines, manufactures, compositions of matter, means, methods and steps. In addition, each claim constitutes an individual embodiment, and the protection scope of the present disclosure also includes the combination of each claim and embodiment. The protection scope of the present disclosure is subject to the claims attached hereto.

Claims

1. A display device, characterized in that, include: First optical layer; Multiple first light sources are disposed adjacent to the first optical layer; A light modulation layer is disposed on the first optical layer; The second optical layer is disposed on the light modulation layer and includes a plurality of microparticles; as well as Multiple second light sources are disposed adjacent to the second optical layer, wherein: In the first mode, the plurality of second light sources are turned off, and the plurality of first light sources are turned on to emit first light rays that pass through the first optical layer, the light modulation layer, and the second optical layer; In the second mode, the plurality of second light sources are turned on to emit second light rays through the second optical layer, and the plurality of first light sources are turned on to emit first light rays through the first optical layer, the light modulation layer, and the second optical layer; In the front view, the plurality of first light sources are arranged along a first direction, the plurality of second light sources are arranged along a second direction, and the first direction is perpendicular to the second direction.

2. The display device according to claim 1, characterized in that, Also includes: First brightening film; as well as The second brightness enhancement film is disposed between the first brightness enhancement film and the first optical layer.

3. The display device according to claim 2, characterized in that, In the front view, the plurality of first dimming structures of the first brightness enhancement film intersect with the plurality of second dimming structures of the second brightness enhancement film.

4. The display device according to claim 2, characterized in that, The first brightness enhancement film includes a prism sheet, and the plurality of first dimming structures of the first brightness enhancement film include a plurality of columnar prisms, wherein the pitch of the plurality of columnar prisms is between 20 μm and 60 μm.

5. The display device according to claim 2, characterized in that, The light modulation layer is disposed between the first brightness enhancement film and the second optical layer.

6. The display device according to claim 5, characterized in that, The light modulation layer includes multiple partition structures, and the pitch of the multiple partition structures is greater than 29 μm and less than 5 mm.

7. The display device according to claim 1, characterized in that, The display device includes a first area, and the luminous intensity of the first area in the second mode is greater than the luminous intensity of the first area of ​​the display device in the first mode.

8. The display device according to claim 1, characterized in that, In the cross-sectional view, the first light ray has a first light emission range, which includes a third direction from the first area of ​​the display panel toward the plurality of second light sources to a fourth direction from the first area of ​​the display panel toward the plurality of second light sources, wherein the third direction and the fourth direction are respectively at 20 degrees to the normal direction of the first area.

9. The display device according to claim 1, characterized in that, In the cross-sectional view, the second light ray has a second light emission range, which includes a fifth direction from the first area of ​​the display panel away from the plurality of second light sources to a sixth direction from the first area of ​​the display panel away from the plurality of second light sources. The fifth direction is at a 45-degree angle to the normal direction of the first area, and the sixth direction is at an 80-degree angle to the normal direction of the first area.

10. A display device, characterized in that, Installed in a transport device and including: First optical layer; Multiple first light sources are disposed adjacent to the first optical layer; A light modulation layer is disposed on the first optical layer; A second optical layer is disposed on the light modulation layer and has a first side and a second side relative to the first side; and Multiple second light sources are disposed adjacent to the first side of the second optical layer, wherein: In the first mode, the plurality of second light sources are turned off and the plurality of first light sources are turned on to emit first light rays that pass through the first optical layer, the light modulation layer and the second optical layer; In the second mode, the plurality of second light sources are turned on to emit second light rays through the second optical layer, and the plurality of first light sources are turned on to emit first light rays through the first optical layer, the light modulation layer, and the second optical layer; The distance from the first side to the driver's seat of the transport device is greater than the distance from the second side to the driver's seat of the transport device.

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