US20230258975A1 - Display device - Google Patents
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- US20230258975A1 US20230258975A1 US18/305,501 US202318305501A US2023258975A1 US 20230258975 A1 US20230258975 A1 US 20230258975A1 US 202318305501 A US202318305501 A US 202318305501A US 2023258975 A1 US2023258975 A1 US 2023258975A1
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- display device
- light sources
- disposed
- diffuser plate
- optical film
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- 230000009977 dual effect Effects 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
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Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133388—Constructional arrangements; Manufacturing methods with constructional differences between the display region and the peripheral region
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133613—Direct backlight characterized by the sequence of light sources
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
- G02F2201/56—Substrates having a particular shape, e.g. non-rectangular
Definitions
- the present disclosure relates to a display device, and more particularly to a display device using the structural design of the backlight module to increase viewing angle or brightness.
- An electronic display device is an optoelectronic device capable of transforming electronic signals into a visible image, so as to allow a user to view the information that has been transformed from electronic signals.
- electronic display devices such as liquid-crystal displays (LCD) and organic electro luminescence displays have become popular.
- the dashboard of a car can be designed with a non-rectangular shaped structure so as to enhance its aesthetic appearance.
- a curved or non-rectangular display device may have problems such as a small viewing angle, insufficient brightness, or non-uniform brightness.
- the disclosure provides a display device to solve the aforementioned problem.
- the disclosure provides a display device which includes a display unit and a backlight module.
- the backlight module is disposed corresponding to the display unit.
- the backlight module includes a circuit board, a plurality of light sources, a diffuser plate and an optical film.
- the plurality of light sources is disposed on the circuit board.
- the diffuser plate is disposed between the light sources and the display unit, and the optical film is disposed between the diffuser plate and the display unit.
- the optical film includes a micro-structure, and the micro-structure faces the light sources.
- the display device can be a flat panel display, a curved display device or a display device with an irregularly shaped structure (such as a non-rectangular shaped structure). Based on the arrangement of different optical films or the arrangement of the light sources disposed on the circuit board with the irregularly shaped structure, the viewing angle of the display device can be increased, the brightness of the display device can be stronger, or the phenomenon of non-uniform brightness can be prevented from occurring.
- FIG. 1 is a diagram of a display device according to the first embodiment of the disclosure.
- FIG. 2 is a diagram of a display device according to the second embodiment of the disclosure.
- FIG. 3 is a diagram of a display device according to the third embodiment of the disclosure.
- FIG. 5 is a diagram of a display device according to the fifth embodiment of the disclosure.
- FIG. 6 is a diagram of a display device according to the sixth embodiment of the disclosure.
- FIG. 7 A is a diagram of the circuit board viewed along the Y axis according to any embodiment of the disclosure.
- FIG. 8 is a diagram of a backlight module according to an embodiment of the disclosure.
- FIG. 10 is a diagram illustrating another edge unit and a first circuit block adjacent to the edge unit.
- FIG. 12 is a diagram illustrating two adjacent edge units.
- FIG. 13 is a sectional view of a display device which is perpendicular to the XY plane according to the seventh embodiment of the disclosure.
- FIG. 14 is a diagram illustrating the relationship between the brightness of the display device and the angle of view according to an embodiment of the disclosure.
- FIG. 15 is a partial structural diagram of a backlight module according to an embodiment of the disclosure.
- FIG. 16 is a diagram of a display device according to the eighth embodiment of the disclosure.
- FIG. 17 is a diagram of a display device according to the ninth embodiment of the disclosure.
- FIG. 1 is a diagram of a display device 100 according to the first embodiment of the disclosure.
- the display device 100 can be a direct-lit curved display device.
- the display device 100 includes a display unit 102 and a backlight module 104 .
- the display unit 102 can include two substrates (such as a rigid substrate, a glass substrate, a flexible substrate, substrates made of other materials, and a combination thereof), a display layer (such as a liquid-crystal layer or other display layers) and a driving circuit layer (not shown in the figures), and so on.
- the display unit 102 can selectively include a color filter disposed between two substrates, but it is not limited thereto.
- the display layer is disposed between the two substrates, and the driving circuit layer can include a plurality of thin-film transistor (TFT).
- TFT thin-film transistor
- the color filter can, for example, include a red filter portion, a green filter portion, or a blue filter portion.
- the color filter can also be formed of other materials with light-conversion properties, such as a quantum dot material, a fluorescent material, a phosphor material, or a combination thereof, but it is not limited thereto.
- the first diffuser plate 110 can be disposed between the light sources 108 and the display unit 102
- the second diffuser plate 112 can be disposed between the first diffuser plate 110 and the display unit 102 .
- the arrangement of the first diffuser plate 110 and the second diffuser plate 112 can increase the viewing angle of the display device 100 , can increase the brightness of the display device 100 , or can prevent the phenomenon of non-uniform brightness from occurring.
- the display device 100 is a curved display device.
- the circuit board 106 , the first diffuser plate 110 , the second diffuser plate 112 and the display unit 102 are illustrated in FIG. 1 as a planar structure, those structures are actually curved because only a portion of the display device 100 is illustrated in FIG. 1 .
- the circuit board 106 includes at least one radius of curvature, and the radius of curvature ranges from 10 mm to 10000 mm. In other embodiments, the at least one radius of curvature ranges from 50 mm to 7000 mm.
- a distance between two adjacent light sources 108 is defined as a first distance d 1
- a distance between the first diffuser plate 110 and the circuit board 106 is defined as a second distance d 2 .
- the first distance d 1 can be the distance between the centers of two adjacent light sources 108 (as illustrated in FIG. 1 ), or the distance between the same sides of the two adjacent light sources 108 (such as two left sides of the two light sources 108 or two right sides of the two light sources 108 ).
- the second distance d 2 can be the distance between a lower surface of the first diffuser plate 110 and the upper surface of the circuit board 106 (as illustrated in FIG. 1 ).
- the ratio of the first distance d 1 to the second distance d 2 is configured to be 15:10.
- the backlight module 104 can further include a dot printing layer (not shown in the figures) disposed on the lower surface of the first diffuser plate 110 .
- the second distance d 2 can be configured to be the distance between the lower surface of the first diffuser plate 110 having the dot printing layer and the upper surface of the circuit board 106 , and the ratio of the first distance d 1 to the second distance d 2 can be designed to be 25:10.
- a conventional display device includes a second lens disposed on the surface of the light-emitting diode.
- the second lens is usually not able to be stably fixed on the circuit board, and easily causes the problem of non-uniform brightness. Therefore, in this embodiment, at least one light source 108 can have no second lens.
- no second lens is disposed on all of the light sources 108 , or only a part of the light sources 108 have the second lenses, but it is not limited thereto.
- FIG. 2 is a diagram of a display device 100 A according to the second embodiment of the disclosure.
- a backlight module 104 A of the display device 100 A further includes a first optical film 114 and a second optical film 116 .
- the first optical film 114 can be disposed between the second diffuser plate 112 and the display unit 102
- the second optical film 116 can be disposed between the first optical film 114 and the display unit 102 .
- the first optical film 114 can be a diffuser film
- the second optical film 116 can be a diffuser film or a dual brightness enhancement film.
- the brightness of the display device 100 A is more uniform due to the configuration of the first optical film 114 and the second optical film 116 .
- FIG. 3 is a diagram of a display device 100 B according to the third embodiment of the disclosure.
- a backlight module 104 B of the display device 100 B further includes a first brightness enhancement film 118 and a second brightness enhancement film 120 .
- the first brightness enhancement film 118 can be disposed between the first optical film 114 and the second optical film 116
- the second brightness enhancement film 120 can be disposed between the first brightness enhancement film 118 and the second optical film 116 .
- the brightness of the display device 100 B can be further increased due to the configuration of the first brightness enhancement film 118 and the second brightness enhancement film 120 .
- FIG. 4 is a diagram of a display device 100 C according to the fourth embodiment of the disclosure.
- a backlight module 104 C of the display device 100 C further includes a third brightness enhancement film 122 .
- the third brightness enhancement film 122 is disposed between the first diffuser plate 110 and the second diffuser plate 112 .
- the brightness of the display device 100 C can be increased due to the configuration of the first brightness enhancement film 118 and the second brightness enhancement film 120 , and the brightness of the display device 100 C is more uniform due to the configuration of the third brightness enhancement film 122 .
- FIG. 6 is a diagram of a display device 100 E according to the sixth embodiment of the disclosure.
- a backlight module 104 E of the display device 100 E includes the circuit board 106 , the light sources 108 , the first optical film 114 , the first brightness enhancement film 118 , the second brightness enhancement film 120 , a first micro-lens diffuser plate 126 and a second micro-lens diffuser plate 128 .
- first diffuser plate 110 and the second diffuser plate 112 in the first to fifth embodiments can also respectively be replaced by the first micro-lens diffuser plate 126 and the second micro-lens diffuser plate 128 . Furthermore, one of the first diffuser plate 110 and the second diffuser plate 112 can be replaced by the micro-lens diffuser plate.
- the structural configuration of the backlight module can be modified according to the design requirements.
- FIG. 7 A is a diagram of the circuit board viewed along the Y axis according to any embodiment of the disclosure
- FIG. 7 B is a partial diagram of the circuit board according to any embodiment of the disclosure.
- a circuit board 1060 when viewed along the Y axis, can be an irregularly shaped structure and can have at least one radius of curvature, which ranges from 10 mm to 10000 mm or ranges from 50 mm to 7000 mm.
- the circuit board 1060 includes regions A to G, and the region A, the region B, the region C, the region E and the region F can have different radii of curvature.
- the region D and the region G can be substantially a plane, and there can be an inflection point in the region B and the region C, or in the region E and the region F, but it is not limited thereto.
- the circuit board 1060 can have other shapes and other radii of curvature according to the design requirements.
- FIG. 7 B is a partial enlarged diagram of the region E of the circuit board 1060 .
- the light source 108 can have a rectangular structure, the circuit board 1060 can have a curved surface S, and the light source 108 can be disposed on the curved surface S.
- the curved surface S can be a surface close to the display unit 102 , but it is not limited thereto.
- the rectangular structure of the light source 108 can define a long side direction A 1
- the curved surface S can define an extending line Rx.
- the long side direction A 1 of the rectangular structure is substantially perpendicular to the extending line Rx of the curved surface S. That is, the included angle between the long side direction A 1 and the extending line Rx is in a range from about 85 degrees to 95 degrees.
- the arrangement of the light sources 108 on the curved surface S is not limited to this embodiment.
- the long side direction A 1 of the light source 108 can be parallel to the extending line Rx of the curved surface S.
- the long side direction A 1 may be a direction along a longitudinal axis (such as Y axis in FIG. 7 B ) of the light source 108 .
- “extending line Rx” could be a virtual line along the curved surface S (as shown in FIG. 7 B ) perpendicular to a bending axis (such as along Y axis in FIG. 7 B ) of the circuit board 1060 from plan view (such as viewing along Z axis in FIG. 7 B ).
- the first circuit blocks 1061 can have the same size and the same shape, and are, for example, arranged in a matrix, but it is not limited to this disclosure. In other embodiments, the first circuit blocks 1061 can have different sizes and different shaped, and can be arranged according to the design requirements. At least one of the edge units can has a second circuit block and an edge portion. In one embodiment, each of the edge units can has a second circuit block and an edge portion.
- the edge unit 1062 can have a second circuit block 1062 A and an edge portion 1062 B
- the edge unit 1063 can have a second circuit block 1063 A and an edge portion 1063 B
- the edge unit 1064 can have a second circuit block 1064 A and an edge portion 1064 B
- the edge unit 1065 can have a second circuit block 1065 A and an edge portion 1065 B.
- the edge portions 1062 B to 1065 B can be adjacent to the second circuit blocks 1062 A to 1065 A
- the second circuit blocks 1062 A to 1065 A can be respectively disposed between the edge portions and the first circuit blocks 1061 .
- the shapes of the second circuit blocks 1062 A to 1065 A are different from the shapes of the first circuit blocks 1061 .
- the first circuit blocks 1061 and the second circuit blocks 1062 A to 1065 A can substantially correspond to a display area of the display unit 102
- the edge portions 1062 B to 1065 B can substantially correspond to a peripheral area of the display unit 102
- the peripheral area surrounds the display area, but it is not limited thereto.
- the light emitting units can further include a first light source group which includes a plurality of first light sources 1081 , and at least one portion of the first light sources 1081 are disposed corresponding to the first circuit block 1061 .
- the first light source group can include nine first light sources 1081 disposed on the corresponding first circuit block 1061 .
- a spacing between two adjacent first light sources 1081 is defined as a first spacing D 1 , and the first spacing D 1 is a constant value.
- the first spacing D 1 can be the distance between the centers of two adjacent first light sources 1081 (as illustrated in FIG.
- the backlight module 104 F can include a plurality of blocking walls 1061 a protruding along the Z axis (not shown in the figures), and the blocking walls 1061 a are disposed between the light emitting units.
- the blocking wall 1061 a is disposed on the boundary between two adjacent first circuit blocks 1061 .
- the blocking wall 1061 a is configured to concentrate the light emitted from the first light sources 1081 of the corresponding first circuit block 1061 within the area of the first circuit block 1061 .
- the blocking wall 1061 a can also be disposed between the first circuit block 1061 and the second circuit block.
- FIG. 9 is a diagram illustrating one of the edge units 1062 and the adjacent first circuit block 1061 shown in FIG. 8 .
- the area of the second circuit block 1062 A of the edge unit 1062 is less than 50% of the area of the adjacent first circuit block 1061 , there can be no additional light source disposed on the second circuit block 1062 A, and the nine first light sources 1081 corresponding to the first circuit block 1061 can be arranged on the first circuit block 1061 , the second circuit block 1062 A and the edge portion 1062 B, but the arrangement of the first light sources 1081 is not limited to the embodiment.
- the nine first light sources 1081 originally corresponding to the first circuit block 1061 can still be arranged on the first circuit block 1061 , the second circuit block 1062 A and the edge portion 1062 B.
- an exemplary arrangement of the first light sources 1081 is shown in FIG. 9 .
- Six first light sources 1081 can be disposed on the first circuit block 1061
- three first light sources 1081 can be disposed on the second circuit block 1062 A and the edge portion 1062 B.
- the first circuit block 1061 , the second circuit block 1062 A and the edge portion 1062 B can be arranged along the Y axis.
- a spacing between two adjacent first light sources 1081 along the X axis is defined as a first spacing D 1 (the first spacing D 1 is, for example, the distance between the centers of two adjacent first light sources 1081 along the X axis).
- a spacing between two adjacent first light sources 1081 along the Y axis is defined as a third spacing D 2 (the third spacing D 2 is, for example, the distance between the centers of two adjacent first light sources 1081 along the Y axis), and the third spacing D 2 can be greater than the first spacing D 1 .
- the nine first light sources 1081 of the first light source group are disposed on the first circuit block 1061 , the second circuit block 1062 A and the edge portion 1062 B, the blocking wall between the first circuit block 1061 and the second circuit block 1062 A can be removed.
- a spacing between two adjacent second light sources 1082 along the X axis is defined as a first spacing D 1 (the first spacing D 1 is, for example, the distance between the centers of two adjacent second light sources 1082 along the X axis), and the first spacing D 1 is different from the second spacing D 3 .
- the first spacing D 1 can be greater than the second spacing D 3 , but it is not limited thereto.
- the blocking wall can be disposed between the first circuit block 1061 and the second circuit block 1063 A.
- the first light sources 1081 and the second light sources 1082 can be arranged as shown in FIG. 12 .
- FIG. 12 is a diagram illustrating the edge unit 1064 and the edge unit 1065 adjacent to the edge unit 1064 in FIG. 8 .
- the edge unit 1064 is adjacent to the edge unit 1065 .
- the second light sources 1082 can, for example, be disposed in the edge unit 1064 and the edge unit 1065 in a stepped manner.
- three second light sources 1082 can be disposed in the edge unit 1064
- six second light sources 1082 can be disposed in the edge unit 1065 .
- the second light sources 1082 can be disposed in the second circuit block 1064 A, the edge portion 1064 B, the second circuit block 1065 A and the edge portion 1065 B, but the arrangement is not limited to this embodiment. In one embodiment, the second light sources 1082 can be selectively disposed in at least one of the second circuit block 1064 A, the edge portion 1064 B, the second circuit block 1065 A and the edge portion 1065 B according to the design requirements, but the arrangement is not limited to this embodiment.
- FIG. 13 is a sectional view of a display device 100 G which is perpendicular to the XY plane according to the seventh embodiment of the disclosure.
- the display device 100 G can include the display unit 102 and a backlight module 104 G.
- the backlight module 104 G can be disposed corresponding to the display unit 102
- the backlight module 104 G can include the circuit board 106 , a plurality of light sources 108 , a diffuser plate 130 and an optical film 132 .
- the light sources 108 can be disposed on the circuit board 106
- the diffuser plate 130 can be disposed between the light sources 108 and the display unit 102 .
- the optical film 132 can be disposed between the diffuser plate 130 and the display unit 102 , and the surface of the optical film 132 close to the diffuser plate 130 can include a micro-structure 134 , and the micro-structure 134 can face the light sources 108 .
- the micro-structure 134 and the optical film 132 can be integrally formed in one piece, and the micro-structure 134 is disposed on the surface of the optical film 132 which is close to the diffuser plate 130 , so as to face the light sources 108 .
- a layer of material can be coated on the surface of the optical film 132 close to the diffuser plate 130 , so as to form the micro-structure 134 , but the method of forming the micro-structure 134 is not limited to this embodiment.
- cross-section of FIG. 13 can be a cross-section which is perpendicular to the surface of the optical film 132 , or is a cross-section which is parallel to the Z axis.
- the micro-structure 134 can include a plurality of arc-shaped structures, such as micro-lens structures.
- the arc-shaped structure can protrude from the surface of the optical film 132 and can face the diffuser plate 130 or the light sources 108 .
- the viewing angle of the display device 100 G along some directions can be increased, or the display device 100 G has sufficient brightness on a specific angle of view because of the optical film 132 having the micro-structure 134 . For example, as shown in FIG.
- the angle of view can be an angle defined by the line of sight of the user and the Z axis on the XZ plane. As shown in FIG. 14 , when the angle of view of the user is 60 degrees, the brightness can achieve 50% of the maximum brightness because of the configuration of the optical film 132 .
- FIG. 15 is a partial structural diagram of a backlight module 104 H according to an embodiment of the disclosure.
- the optical film 132 can include a micro-structure 136
- the micro-structure 136 can include a plurality of prism structures.
- the prism structures can, for example, be long strip triangular structures (as shown in FIG. 15 ), and the prism structures can protrude from the optical film 132 and face the light sources on the circuit board 106 (not shown in the figures).
- the optical film 132 can include a rectangular structure.
- the rectangular structure can have a long side direction A 2 (such as the direction of the X axis in FIG. 15 ) and a short side direction A 3 (such as the direction of the Y axis in FIG. 15 ), and a longitudinal axis direction Am (such as the direction of the Y axis or an extending line of the prism structures) can be perpendicular to the long side direction A 2 of the rectangular structure of the optical film 132 , so as to increase the viewing angle of the backlight module 104 H.
- the angle of view can also be the angle defined by the line of sight of the user and the Z axis on the XZ plane, and the viewing angle can be defined as the maximum angle of view which allows the user clearly watching the display device along the XZ plane. For example, as shown in FIG. 14 , when the angle of view of the user is 60 degrees, the brightness can maintained above 50% of the maximum brightness.
- the longitudinal axis direction Am can also be perpendicular to the short side direction A 3 of the optical film 132 , so as to increase the viewing angle of the backlight module 104 H.
- the line of sight of the user is parallel to the YZ plane, and the angle of view can be the angle defined by the line of sight of the user and the Z axis on the YZ plane.
- the viewing angle can be defined as the maximum angle of view which allows the user clearly watching the display device along the YZ plane, but it is not limited to this embodiment.
- other micro-structure of the optical film or the manner of disposing the micro-structure can be implemented according to the design requirements.
- FIG. 16 is a diagram of a display device 100 I according to the eighth embodiment of the disclosure.
- the structure of the display device 100 I disclosed in this embodiment is similar to the structure of the display device 100 G disclosed in the seventh embodiment.
- the difference between the display device 100 I and the display device 100 G is that the display device 100 I of this embodiment can further include the first brightness enhancement film 118 disposed between the diffuser plate 130 and the optical film 132 .
- the brightness of the display device 100 I can be increased because of the configuration of the first brightness enhancement film 118 .
- the display device 100 I can also include another brightness enhancement film (not shown in the figures) disposed between the first brightness enhancement film 118 and the optical film 132 , so as to increase the brightness of the display device 100 I.
- FIG. 17 is a diagram of a display device 100 J according to the ninth embodiment of the disclosure.
- the display device 100 J can further include a second brightness enhancement film 120 and an optical film 138 , and the optical film 138 can be a dual brightness enhancement film or a diffuser plate.
- the second brightness enhancement film 120 can be disposed between the first brightness enhancement film 118 and the optical film 132 . Based on the configuration of the first brightness enhancement film 118 , the second brightness enhancement film 120 and the optical film 138 , the brightness of the display device 100 J can be increased or the effect of light-concentrating can be improved.
- the display device includes the display unit and the backlight module.
- the display device can be a flat panel display, a curved display device or a display device with an irregularly shaped structure (such as a non-rectangular shaped structure). Based on the arrangement of different optical films or the arrangement of the light sources disposed on the circuit board with the irregularly shaped structure, the viewing angle of the display device can be increased, the brightness of the display device can be stronger, or the phenomenon of non-uniform brightness can be prevented from occurring.
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Abstract
Description
- This application is a divisional application of U.S. application Ser. No. 17/723,977, filed Apr. 19, 2022, which is a Continuation of application Ser. No. 16,878,964, filed May 20, 2020, which is a divisional application of U.S. application Ser. No. 15/707,388, filed Sep. 18, 2017, now U.S. Pat. No. 10,690,960, which claims benefit of U.S. Provisional Application No. 62/408,871 filed Oct. 17, 2016, U.S. Provisional Application No. 62/416,679 filed Nov. 2, 2016, and China Patent Application No. 201710541920.8, filed Jul. 5, 2017, the entirety of which is incorporated by reference herein.
- The present disclosure relates to a display device, and more particularly to a display device using the structural design of the backlight module to increase viewing angle or brightness.
- An electronic display device is an optoelectronic device capable of transforming electronic signals into a visible image, so as to allow a user to view the information that has been transformed from electronic signals. Recently, electronic display devices such as liquid-crystal displays (LCD) and organic electro luminescence displays have become popular.
- In recent years, curved display devices as well as those with non-rectangular shapes have found application in various fields. For example, the dashboard of a car can be designed with a non-rectangular shaped structure so as to enhance its aesthetic appearance.
- However, in contrast to conventional flat panel display devices, a curved or non-rectangular display device may have problems such as a small viewing angle, insufficient brightness, or non-uniform brightness.
- Consequently, how to design a display device with large viewing angle, sufficient brightness or uniform brightness is an important subject.
- As a result, the disclosure provides a display device to solve the aforementioned problem.
- In one embodiment, the disclosure provides a display device which includes a display unit and a backlight module. The backlight module is disposed corresponding to the display unit. The backlight module includes a circuit board, a plurality of light sources, a diffuser plate and an optical film. The plurality of light sources is disposed on the circuit board. The diffuser plate is disposed between the light sources and the display unit, and the optical film is disposed between the diffuser plate and the display unit. The optical film includes a micro-structure, and the micro-structure faces the light sources.
- In the embodiments of the disclosure, the display device can be a flat panel display, a curved display device or a display device with an irregularly shaped structure (such as a non-rectangular shaped structure). Based on the arrangement of different optical films or the arrangement of the light sources disposed on the circuit board with the irregularly shaped structure, the viewing angle of the display device can be increased, the brightness of the display device can be stronger, or the phenomenon of non-uniform brightness can be prevented from occurring.
- Additional features and advantages of the disclosure will be set forth in the description which follows, and, in part, will be obvious from the description, or can be learned by practice of the principles disclosed herein. The features and advantages of the disclosure can be realized and obtained by means of the instruments and combinations particularly pointed out in the appended claims. These and other features of the disclosure will become more fully apparent from the following description and appended claims, or can be learned by the practice of the principles set forth herein.
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FIG. 1 is a diagram of a display device according to the first embodiment of the disclosure. -
FIG. 2 is a diagram of a display device according to the second embodiment of the disclosure. -
FIG. 3 is a diagram of a display device according to the third embodiment of the disclosure. -
FIG. 4 is a diagram of a display device according to the fourth embodiment of the disclosure. -
FIG. 5 is a diagram of a display device according to the fifth embodiment of the disclosure. -
FIG. 6 is a diagram of a display device according to the sixth embodiment of the disclosure. -
FIG. 7A is a diagram of the circuit board viewed along the Y axis according to any embodiment of the disclosure. -
FIG. 7B is a partial diagram of the circuit board according to any embodiment of the disclosure. -
FIG. 8 is a diagram of a backlight module according to an embodiment of the disclosure. -
FIG. 9 is a diagram illustrating one edge unit and a first circuit block adjacent to the edge unit. -
FIG. 10 is a diagram illustrating another edge unit and a first circuit block adjacent to the edge unit. -
FIG. 11 is a diagram illustrating another edge unit and a first circuit block adjacent to the edge unit. -
FIG. 12 is a diagram illustrating two adjacent edge units. -
FIG. 13 is a sectional view of a display device which is perpendicular to the XY plane according to the seventh embodiment of the disclosure. -
FIG. 14 is a diagram illustrating the relationship between the brightness of the display device and the angle of view according to an embodiment of the disclosure. -
FIG. 15 is a partial structural diagram of a backlight module according to an embodiment of the disclosure. -
FIG. 16 is a diagram of a display device according to the eighth embodiment of the disclosure. -
FIG. 17 is a diagram of a display device according to the ninth embodiment of the disclosure. - In the following detailed description, for the purposes of explanation, numerous specific details and embodiments are set forth in order to provide a thorough understanding of the present disclosure. The specific elements and configurations described in the following detailed description are set forth in order to clearly describe the present disclosure. It will be apparent, however, that the exemplary embodiments set forth herein are used merely for the purpose of illustration, and the inventive concept may be embodied in various forms without being limited to those exemplary embodiments. In addition, the drawings of different embodiments may use like and/or corresponding numerals to denote like and/or corresponding elements in order to clearly describe the present disclosure. However, the use of like and/or corresponding numerals in the drawings of different embodiments does not suggest any correlation between different embodiments. The directional terms, such as “up”, “down”, “left”, “right”, “front” or “rear”, are reference directions for accompanying drawings. Therefore, using the directional terms is for description instead of limiting the disclosure.
- In this specification, relative expressions are used. For example, “lower”, “bottom”, “higher” or “top” are used to describe the position of one element relative to another. It should be appreciated that if a device is flipped upside down, an element at a “lower” side will become an element at a “higher” side.
- The terms “about” and “substantially” typically mean +/−20% of the stated value, more typically +/−10% of the stated value and even more typically +/−5% of the stated value. The stated value of the present disclosure is an approximate value. When there is no specific description, the stated value includes the meaning of “about” or “substantially”.
- Please refer to
FIG. 1 , which is a diagram of adisplay device 100 according to the first embodiment of the disclosure. In this embodiment, thedisplay device 100 can be a direct-lit curved display device. Thedisplay device 100 includes adisplay unit 102 and abacklight module 104. Thedisplay unit 102 can include two substrates (such as a rigid substrate, a glass substrate, a flexible substrate, substrates made of other materials, and a combination thereof), a display layer (such as a liquid-crystal layer or other display layers) and a driving circuit layer (not shown in the figures), and so on. In other embodiments, thedisplay unit 102 can selectively include a color filter disposed between two substrates, but it is not limited thereto. The display layer is disposed between the two substrates, and the driving circuit layer can include a plurality of thin-film transistor (TFT). The color filter can, for example, include a red filter portion, a green filter portion, or a blue filter portion. In other embodiments, the color filter can also be formed of other materials with light-conversion properties, such as a quantum dot material, a fluorescent material, a phosphor material, or a combination thereof, but it is not limited thereto. - The
backlight module 104 can be disposed corresponding to thedisplay unit 102. In particular, thebacklight module 104 can be disposed below thedisplay unit 102. In this embodiment, thebacklight module 104 can include acircuit board 106, a plurality oflight sources 108, afirst diffuser plate 110 and asecond diffuser plate 112. Thelight sources 108 can be disposed on thecircuit board 106. In one embodiment of the disclosure, thelight sources 108 can include a quantum dot (QD) material, a fluorescent material, a phosphor material, a light-emitting diode (LED), a micro light-emitting diode (micro LED), other light sources or a combination thereof, but it is not limited thereto. Thefirst diffuser plate 110 can be disposed between thelight sources 108 and thedisplay unit 102, and thesecond diffuser plate 112 can be disposed between thefirst diffuser plate 110 and thedisplay unit 102. The arrangement of thefirst diffuser plate 110 and thesecond diffuser plate 112 can increase the viewing angle of thedisplay device 100, can increase the brightness of thedisplay device 100, or can prevent the phenomenon of non-uniform brightness from occurring. - In this embodiment, the
display device 100 is a curved display device. Although thecircuit board 106, thefirst diffuser plate 110, thesecond diffuser plate 112 and thedisplay unit 102 are illustrated inFIG. 1 as a planar structure, those structures are actually curved because only a portion of thedisplay device 100 is illustrated inFIG. 1 . Thecircuit board 106 includes at least one radius of curvature, and the radius of curvature ranges from 10 mm to 10000 mm. In other embodiments, the at least one radius of curvature ranges from 50 mm to 7000 mm. - In addition, a distance between two adjacent
light sources 108 is defined as a first distance d1, and a distance between thefirst diffuser plate 110 and thecircuit board 106 is defined as a second distance d2. Specifically, on a cross-section perpendicular to an upper surface of thecircuit board 106, the first distance d1 can be the distance between the centers of two adjacent light sources 108 (as illustrated inFIG. 1 ), or the distance between the same sides of the two adjacent light sources 108 (such as two left sides of the twolight sources 108 or two right sides of the two light sources 108). The second distance d2 can be the distance between a lower surface of thefirst diffuser plate 110 and the upper surface of the circuit board 106 (as illustrated inFIG. 1 ). In this embodiment, the ratio of the first distance d1 to the second distance d2 is configured to be 15:10. In another embodiment, thebacklight module 104 can further include a dot printing layer (not shown in the figures) disposed on the lower surface of thefirst diffuser plate 110. At this time, the second distance d2 can be configured to be the distance between the lower surface of thefirst diffuser plate 110 having the dot printing layer and the upper surface of thecircuit board 106, and the ratio of the first distance d1 to the second distance d2 can be designed to be 25:10. - In addition, it should be noted that no lens structure can be disposed between the
first diffuser plate 110 and thecircuit board 106 in thebacklight module 104. For example, a conventional display device includes a second lens disposed on the surface of the light-emitting diode. However, in the curved display device, the second lens is usually not able to be stably fixed on the circuit board, and easily causes the problem of non-uniform brightness. Therefore, in this embodiment, at least onelight source 108 can have no second lens. For example, no second lens is disposed on all of thelight sources 108, or only a part of thelight sources 108 have the second lenses, but it is not limited thereto. - Please refer to
FIG. 2 , which is a diagram of adisplay device 100A according to the second embodiment of the disclosure. In contrast to the first embodiment, abacklight module 104A of thedisplay device 100A further includes a firstoptical film 114 and a secondoptical film 116. The firstoptical film 114 can be disposed between thesecond diffuser plate 112 and thedisplay unit 102, and the secondoptical film 116 can be disposed between the firstoptical film 114 and thedisplay unit 102. The firstoptical film 114 can be a diffuser film, and the secondoptical film 116 can be a diffuser film or a dual brightness enhancement film. The brightness of thedisplay device 100A is more uniform due to the configuration of the firstoptical film 114 and the secondoptical film 116. - Please refer to
FIG. 3 , which is a diagram of adisplay device 100B according to the third embodiment of the disclosure. In contrast to the second embodiment, abacklight module 104B of thedisplay device 100B further includes a firstbrightness enhancement film 118 and a secondbrightness enhancement film 120. The firstbrightness enhancement film 118 can be disposed between the firstoptical film 114 and the secondoptical film 116, and the secondbrightness enhancement film 120 can be disposed between the firstbrightness enhancement film 118 and the secondoptical film 116. The brightness of thedisplay device 100B can be further increased due to the configuration of the firstbrightness enhancement film 118 and the secondbrightness enhancement film 120. - Please refer to
FIG. 4 , which is a diagram of adisplay device 100C according to the fourth embodiment of the disclosure. In contrast to the third embodiment, abacklight module 104C of thedisplay device 100C further includes a thirdbrightness enhancement film 122. The thirdbrightness enhancement film 122 is disposed between thefirst diffuser plate 110 and thesecond diffuser plate 112. In this embodiment, the brightness of thedisplay device 100C can be increased due to the configuration of the firstbrightness enhancement film 118 and the secondbrightness enhancement film 120, and the brightness of thedisplay device 100C is more uniform due to the configuration of the thirdbrightness enhancement film 122. - Please refer to
FIG. 5 , which is a diagram of adisplay device 100D according to the fifth embodiment of the disclosure. In contrast to the fourth embodiment, abacklight module 104D of thedisplay device 100D further includes a fourthbrightness enhancement film 124. The fourthbrightness enhancement film 124 is disposed between the thirdbrightness enhancement film 122 and thesecond diffuser plate 112. In this embodiment, the brightness of thedisplay device 100D can be increased due to the configuration of the firstbrightness enhancement film 118 and the secondbrightness enhancement film 120, and the brightness of thedisplay device 100D is more uniform due to the configuration of the thirdbrightness enhancement film 122 and the fourthbrightness enhancement film 124. - Please refer to
FIG. 6 , which is a diagram of adisplay device 100E according to the sixth embodiment of the disclosure. In this embodiment, at least one of thefirst diffuser plate 110 and thesecond diffuser plate 112 can be replaced by a micro-lens diffuser plate. In this embodiment, abacklight module 104E of thedisplay device 100E includes thecircuit board 106, thelight sources 108, the firstoptical film 114, the firstbrightness enhancement film 118, the secondbrightness enhancement film 120, a firstmicro-lens diffuser plate 126 and a secondmicro-lens diffuser plate 128. The firstbrightness enhancement film 118 is disposed between the firstmicro-lens diffuser plate 126 and the secondmicro-lens diffuser plate 128, the secondbrightness enhancement film 120 is disposed between the firstbrightness enhancement film 118 and the secondmicro-lens diffuser plate 128, and the firstoptical film 114 is disposed between the secondmicro-lens diffuser plate 128 and thedisplay unit 102. The brightness and image of thedisplay device 100E can be more uniform due to the configuration of the firstmicro-lens diffuser plate 126 and the secondmicro-lens diffuser plate 128. - It should be noted that the
first diffuser plate 110 and thesecond diffuser plate 112 in the first to fifth embodiments can also respectively be replaced by the firstmicro-lens diffuser plate 126 and the secondmicro-lens diffuser plate 128. Furthermore, one of thefirst diffuser plate 110 and thesecond diffuser plate 112 can be replaced by the micro-lens diffuser plate. The structural configuration of the backlight module can be modified according to the design requirements. - Please refer to
FIG. 7A andFIG. 7B .FIG. 7A is a diagram of the circuit board viewed along the Y axis according to any embodiment of the disclosure, andFIG. 7B is a partial diagram of the circuit board according to any embodiment of the disclosure. As shown inFIG. 7A , when viewed along the Y axis, acircuit board 1060 can be an irregularly shaped structure and can have at least one radius of curvature, which ranges from 10 mm to 10000 mm or ranges from 50 mm to 7000 mm. For example, thecircuit board 1060 includes regions A to G, and the region A, the region B, the region C, the region E and the region F can have different radii of curvature. The region D and the region G can be substantially a plane, and there can be an inflection point in the region B and the region C, or in the region E and the region F, but it is not limited thereto. In other embodiments, thecircuit board 1060 can have other shapes and other radii of curvature according to the design requirements.FIG. 7B is a partial enlarged diagram of the region E of thecircuit board 1060. Thelight source 108 can have a rectangular structure, thecircuit board 1060 can have a curved surface S, and thelight source 108 can be disposed on the curved surface S. The curved surface S can be a surface close to thedisplay unit 102, but it is not limited thereto. Specifically, the rectangular structure of thelight source 108 can define a long side direction A1, and the curved surface S can define an extending line Rx. The long side direction A1 of the rectangular structure is substantially perpendicular to the extending line Rx of the curved surface S. That is, the included angle between the long side direction A1 and the extending line Rx is in a range from about 85 degrees to 95 degrees. However, the arrangement of thelight sources 108 on the curved surface S is not limited to this embodiment. For example, the long side direction A1 of thelight source 108 can be parallel to the extending line Rx of the curved surface S. In other embodiments, when thelight source 108 is not a rectangular structure, the long side direction A1 may be a direction along a longitudinal axis (such as Y axis inFIG. 7B ) of thelight source 108. In this embodiment, “extending line Rx” could be a virtual line along the curved surface S (as shown inFIG. 7B ) perpendicular to a bending axis (such as along Y axis inFIG. 7B ) of thecircuit board 1060 from plan view (such as viewing along Z axis inFIG. 7B ). In one embodiment, “perpendicular to the extending line” or “parallel to the extending line” may be perpendicular to a projection of the extending line on thecircuit board 1060 onto the XY plane in plan view (such as viewing along Z axis inFIG. 7B ) or parallel to a projection of the extending line on thecircuit board 1060 onto the XY plane in plan view (such as viewing along Z axis inFIG. 7B ). - Please refer to
FIG. 8 , which is a diagram of abacklight module 104F according to an embodiment of the disclosure. Thebacklight module 104F includes acircuit board 106′, and thecircuit board 106′ can be defined by and composed of a plurality of light emitting units and a plurality of edge units. The light emitting units are arranged in a matrix, and at least one of the light emitting units can include afirst circuit block 1061. In one embodiment, each of the light emitting units can include afirst circuit block 1061. In one embodiment, thecircuit board 106′ is composed of ten first circuit blocks 1061 with the same shape and fouredge units edge unit 1062 can have asecond circuit block 1062A and anedge portion 1062B, theedge unit 1063 can have asecond circuit block 1063A and anedge portion 1063B, theedge unit 1064 can have asecond circuit block 1064A and anedge portion 1064B, and theedge unit 1065 can have asecond circuit block 1065A and anedge portion 1065B. Theedge portions 1062B to 1065B can be adjacent to thesecond circuit blocks 1062A to 1065A, and thesecond circuit blocks 1062A to 1065A can be respectively disposed between the edge portions and the first circuit blocks 1061. In an embodiment, The shapes of thesecond circuit blocks 1062A to 1065A are different from the shapes of the first circuit blocks 1061. In this embodiment, the first circuit blocks 1061 and thesecond circuit blocks 1062A to 1065A can substantially correspond to a display area of thedisplay unit 102, and theedge portions 1062B to 1065B can substantially correspond to a peripheral area of thedisplay unit 102, and the peripheral area surrounds the display area, but it is not limited thereto. - Furthermore, the light emitting units can further include a first light source group which includes a plurality of
first light sources 1081, and at least one portion of thefirst light sources 1081 are disposed corresponding to thefirst circuit block 1061. In this embodiment, the first light source group can include ninefirst light sources 1081 disposed on the correspondingfirst circuit block 1061. A spacing between two adjacentfirst light sources 1081 is defined as a first spacing D1, and the first spacing D1 is a constant value. The first spacing D1 can be the distance between the centers of two adjacent first light sources 1081 (as illustrated inFIG. 8 ), or the distance between the same sides of the two adjacent first light sources 1081 (such as two left sides of the twofirst light sources 1081 or two right sides of the two first light sources 1081). In other embodiments, the first light source group can only include onefirst light source 1081, but the number of thefirst light sources 1081 is not limited to those embodiments. In one embodiment, the plurality offirst light sources 1081 of the first light source group can be connected to each other in series to output through the same channel and can be electrically connected to a converter. Therefore, the plurality offirst light sources 1081 of the first light source group can be driven together. For example, thefirst light sources 1081 becomes bright or dark at the same time, but it is not limited thereto. Furthermore, thebacklight module 104F can include a plurality of blockingwalls 1061 a protruding along the Z axis (not shown in the figures), and the blockingwalls 1061 a are disposed between the light emitting units. For example, the blockingwall 1061 a is disposed on the boundary between two adjacent first circuit blocks 1061. The blockingwall 1061 a is configured to concentrate the light emitted from thefirst light sources 1081 of the correspondingfirst circuit block 1061 within the area of thefirst circuit block 1061. In addition, the blockingwall 1061 a can also be disposed between thefirst circuit block 1061 and the second circuit block. - Please refer to
FIG. 9 , which is a diagram illustrating one of theedge units 1062 and the adjacentfirst circuit block 1061 shown inFIG. 8 . As shown inFIG. 9 , because the area of thesecond circuit block 1062A of theedge unit 1062 is less than 50% of the area of the adjacentfirst circuit block 1061, there can be no additional light source disposed on thesecond circuit block 1062A, and the ninefirst light sources 1081 corresponding to thefirst circuit block 1061 can be arranged on thefirst circuit block 1061, thesecond circuit block 1062A and theedge portion 1062B, but the arrangement of thefirst light sources 1081 is not limited to the embodiment. In other embodiments, although the ratio of the area of thesecond circuit block 1062A to the area of the adjacentfirst circuit block 1061 varies, the ninefirst light sources 1081 originally corresponding to thefirst circuit block 1061 can still be arranged on thefirst circuit block 1061, thesecond circuit block 1062A and theedge portion 1062B. In one embodiment, an exemplary arrangement of thefirst light sources 1081 is shown inFIG. 9 . Sixfirst light sources 1081 can be disposed on thefirst circuit block 1061, and threefirst light sources 1081 can be disposed on thesecond circuit block 1062A and theedge portion 1062B. Thefirst circuit block 1061, thesecond circuit block 1062A and theedge portion 1062B can be arranged along the Y axis. A spacing between two adjacentfirst light sources 1081 along the X axis is defined as a first spacing D1 (the first spacing D1 is, for example, the distance between the centers of two adjacentfirst light sources 1081 along the X axis). A spacing between two adjacentfirst light sources 1081 along the Y axis is defined as a third spacing D2 (the third spacing D2 is, for example, the distance between the centers of two adjacentfirst light sources 1081 along the Y axis), and the third spacing D2 can be greater than the first spacing D1. In this embodiment, because the ninefirst light sources 1081 of the first light source group are disposed on thefirst circuit block 1061, thesecond circuit block 1062A and theedge portion 1062B, the blocking wall between thefirst circuit block 1061 and thesecond circuit block 1062A can be removed. - Please refer to
FIG. 10 , which is a diagram illustrating theedge unit 1063 and thefirst circuit block 1061 adjacent to theedge unit 1063 inFIG. 8 . As shown inFIG. 10 , one of the edge units further include a second light source group which includes a plurality of secondlight sources 1082. The number of the secondlight sources 1082 can be equal to the number of thefirst light sources 1081, but the number of thefirst light sources 1081 and the number of the secondlight sources 1082 are not limited to this disclosure. In other embodiment, the number of the secondlight sources 1082 can be less than the number of thefirst light sources 1081. In this embodiment, the second light source group includes nine secondlight sources 1082, and the area of thesecond circuit block 1063A is greater than 50% of the area of thefirst circuit block 1061. In this situation, thefirst light sources 1081 can, for example, be disposed on thefirst circuit block 1061 with a fixed spacing, and two adjacentfirst light sources 1081 has the first spacing D1. Furthermore, nine secondlight sources 1082 are disposed within thesecond circuit block 1063A, and two adjacent secondlight sources 1082 can have a second spacing D3 (the second spacing D3 is, for example, the distance between the centers of two adjacent secondlight sources 1082 along the Y axis). A spacing between two adjacent secondlight sources 1082 along the X axis is defined as a first spacing D1 (the first spacing D1 is, for example, the distance between the centers of two adjacent secondlight sources 1082 along the X axis), and the first spacing D1 is different from the second spacing D3. In one embodiment, the first spacing D1 can be greater than the second spacing D3, but it is not limited thereto. It should be noted that there is no light source disposed on theedge portion 1063B. In this embodiment, the blocking wall can be disposed between thefirst circuit block 1061 and thesecond circuit block 1063A. - Please refer to
FIG. 11 , which is a diagram illustrating theedge unit 1063 and thefirst circuit block 1061 adjacent to theedge unit 1063 inFIG. 8 . The difference betweenFIG. 11 andFIG. 10 is that the secondlight sources 1082 are, for example, arranged within theedge unit 1063 in a staggered manner, and the secondlight sources 1082 can be disposed in thesecond circuit block 1063A and theedge portion 1063B at the same time. However, the arrangement of the secondlight sources 1082 can be modified to meet different design requirements. In this embodiment, the blocking wall can be disposed between thefirst circuit block 1061 and thesecond circuit block 1063A. - In addition to the arrangement of the
first light sources 1081 and the secondlight sources 1082, thefirst light sources 1081 and the secondlight sources 1082 can be arranged as shown inFIG. 12 . Please refer toFIG. 12 , which is a diagram illustrating theedge unit 1064 and theedge unit 1065 adjacent to theedge unit 1064 inFIG. 8 . As shown inFIG. 12 , theedge unit 1064 is adjacent to theedge unit 1065. In this situation, the secondlight sources 1082 can, for example, be disposed in theedge unit 1064 and theedge unit 1065 in a stepped manner. As shown inFIG. 12 , three secondlight sources 1082 can be disposed in theedge unit 1064, and six secondlight sources 1082 can be disposed in theedge unit 1065. Specifically, the secondlight sources 1082 can be disposed in thesecond circuit block 1064A, theedge portion 1064B, thesecond circuit block 1065A and theedge portion 1065B, but the arrangement is not limited to this embodiment. In one embodiment, the secondlight sources 1082 can be selectively disposed in at least one of thesecond circuit block 1064A, theedge portion 1064B, thesecond circuit block 1065A and theedge portion 1065B according to the design requirements, but the arrangement is not limited to this embodiment. - Please refer to
FIG. 13 , which is a sectional view of adisplay device 100G which is perpendicular to the XY plane according to the seventh embodiment of the disclosure. As shown inFIG. 13 , thedisplay device 100G can include thedisplay unit 102 and abacklight module 104G. Thebacklight module 104G can be disposed corresponding to thedisplay unit 102, and thebacklight module 104G can include thecircuit board 106, a plurality oflight sources 108, adiffuser plate 130 and anoptical film 132. Thelight sources 108 can be disposed on thecircuit board 106, and thediffuser plate 130 can be disposed between thelight sources 108 and thedisplay unit 102. Theoptical film 132 can be disposed between thediffuser plate 130 and thedisplay unit 102, and the surface of theoptical film 132 close to thediffuser plate 130 can include a micro-structure 134, and the micro-structure 134 can face thelight sources 108. In one embodiment, the micro-structure 134 and theoptical film 132 can be integrally formed in one piece, and the micro-structure 134 is disposed on the surface of theoptical film 132 which is close to thediffuser plate 130, so as to face thelight sources 108. In other embodiments, a layer of material can be coated on the surface of theoptical film 132 close to thediffuser plate 130, so as to form the micro-structure 134, but the method of forming the micro-structure 134 is not limited to this embodiment. - In this embodiment, cross-section of
FIG. 13 can be a cross-section which is perpendicular to the surface of theoptical film 132, or is a cross-section which is parallel to the Z axis. The micro-structure 134 can include a plurality of arc-shaped structures, such as micro-lens structures. The arc-shaped structure can protrude from the surface of theoptical film 132 and can face thediffuser plate 130 or thelight sources 108. The viewing angle of thedisplay device 100G along some directions can be increased, or thedisplay device 100G has sufficient brightness on a specific angle of view because of theoptical film 132 having the micro-structure 134. For example, as shown inFIG. 14 , which is a diagram illustrating the relationship between the brightness of the display device and the angle of view according to an embodiment of the disclosure. A user is located on the upper side of thedisplay device 100G and looks at thedisplay device 100G along the −Z axis (FIG. 13 ), and the line of sight of the user is parallel to the XZ plane. Therefore, the angle of view can be an angle defined by the line of sight of the user and the Z axis on the XZ plane. As shown inFIG. 14 , when the angle of view of the user is 60 degrees, the brightness can achieve 50% of the maximum brightness because of the configuration of theoptical film 132. - Please refer to
FIG. 15 , which is a partial structural diagram of abacklight module 104H according to an embodiment of the disclosure. In this embodiment, theoptical film 132 can include a micro-structure 136, and the micro-structure 136 can include a plurality of prism structures. The prism structures can, for example, be long strip triangular structures (as shown inFIG. 15 ), and the prism structures can protrude from theoptical film 132 and face the light sources on the circuit board 106 (not shown in the figures). - It should be noted that the
optical film 132 can include a rectangular structure. The rectangular structure can have a long side direction A2 (such as the direction of the X axis inFIG. 15 ) and a short side direction A3 (such as the direction of the Y axis inFIG. 15 ), and a longitudinal axis direction Am (such as the direction of the Y axis or an extending line of the prism structures) can be perpendicular to the long side direction A2 of the rectangular structure of theoptical film 132, so as to increase the viewing angle of thebacklight module 104H. The user is located on the upper side of thebacklight module 104H and looks at thebacklight module 104H along the −Z axis, and the line of sight of the user is parallel to the XZ plane. Therefore, the angle of view can also be the angle defined by the line of sight of the user and the Z axis on the XZ plane, and the viewing angle can be defined as the maximum angle of view which allows the user clearly watching the display device along the XZ plane. For example, as shown inFIG. 14 , when the angle of view of the user is 60 degrees, the brightness can maintained above 50% of the maximum brightness. In another embodiment, the longitudinal axis direction Am can also be perpendicular to the short side direction A3 of theoptical film 132, so as to increase the viewing angle of thebacklight module 104H. In this embodiment, the line of sight of the user is parallel to the YZ plane, and the angle of view can be the angle defined by the line of sight of the user and the Z axis on the YZ plane. The viewing angle can be defined as the maximum angle of view which allows the user clearly watching the display device along the YZ plane, but it is not limited to this embodiment. In other embodiments, other micro-structure of the optical film or the manner of disposing the micro-structure can be implemented according to the design requirements. - Please refer to
FIG. 16 , which is a diagram of a display device 100I according to the eighth embodiment of the disclosure. The structure of the display device 100I disclosed in this embodiment is similar to the structure of thedisplay device 100G disclosed in the seventh embodiment. The difference between the display device 100I and thedisplay device 100G is that the display device 100I of this embodiment can further include the firstbrightness enhancement film 118 disposed between thediffuser plate 130 and theoptical film 132. The brightness of the display device 100I can be increased because of the configuration of the firstbrightness enhancement film 118. Furthermore, in one embodiment, the display device 100I can also include another brightness enhancement film (not shown in the figures) disposed between the firstbrightness enhancement film 118 and theoptical film 132, so as to increase the brightness of the display device 100I. - Please refer to
FIG. 17 , which is a diagram of adisplay device 100J according to the ninth embodiment of the disclosure. In contrast to the display device 100I in the eighth embodiment, thedisplay device 100J can further include a secondbrightness enhancement film 120 and anoptical film 138, and theoptical film 138 can be a dual brightness enhancement film or a diffuser plate. The secondbrightness enhancement film 120 can be disposed between the firstbrightness enhancement film 118 and theoptical film 132. Based on the configuration of the firstbrightness enhancement film 118, the secondbrightness enhancement film 120 and theoptical film 138, the brightness of thedisplay device 100J can be increased or the effect of light-concentrating can be improved. - In conclusion, in the embodiments of the disclosure, the display device includes the display unit and the backlight module. The display device can be a flat panel display, a curved display device or a display device with an irregularly shaped structure (such as a non-rectangular shaped structure). Based on the arrangement of different optical films or the arrangement of the light sources disposed on the circuit board with the irregularly shaped structure, the viewing angle of the display device can be increased, the brightness of the display device can be stronger, or the phenomenon of non-uniform brightness can be prevented from occurring.
- Although the embodiments and their advantages have been described in detail, it should be understood that various changes, substitutions, and alterations can be made herein without departing from the spirit and scope of the embodiments as defined by the appended claims. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods, and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed, that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the disclosure. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps. In addition, each claim constitutes a separate embodiment, and the combination of various claims and embodiments are within the scope of the disclosure.
Claims (6)
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US201662408871P | 2016-10-17 | 2016-10-17 | |
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US18/305,501 US20230258975A1 (en) | 2016-10-17 | 2023-04-24 | Display device |
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