Backlight module and light guide module

Abstract

A backlight module and a light guide module, the backlight module includes a light shielding plate, a light guide plate, a first light emitting element and a second light emitting element. The light shielding plate has a first light transmitting portion. The light guide plate has a first light emitting dot area. The first light emitting dot area includes a plurality of first dots distributed non-uniformly within the first light emitting dot area. The first light emitting element and the second light emitting element emit light toward the first light emitting dot area. The light guide plate has a light exit surface in a substantially rectangular shape. The light guide plate has a first long axis direction extending along a long side of the light exit surface. The first light emitting element has a second long axis direction. The second long axis direction forms an acute angle with the first long axis direction. The backlight module of the present disclosure makes the light transmitting portion achieve the visual effect of uniform light when illuminated by light emitting elements of different colors.

Description

Technical Field

[0001] This disclosure relates to a backlight module and a light guide module. Background Technology

[0002] In recent years, computer peripheral manufacturers have begun to develop light touchpads with excellent visual effects. Depending on the user's different functional needs, different button icons can be set on the light touchpad for the user to select and trigger the requested function. Conventional light touchpads utilize an arrangement of light-emitting elements, light guide plates, and light shields, allowing each button icon to illuminate individually.

[0003] However, existing backlit touchpads have limitations in their light mixing capabilities. Specifically, due to space constraints in electronic devices (e.g., laptops) or the limited light-emitting capacity of the light-emitting elements, the illuminated button icons often exhibit uneven lighting. For example, uneven light mixing can lead to inconsistent brightness across individual button icons, thus reducing the user experience.

[0004] Therefore, how to propose a backlight module and light guide module that can solve the above problems is one of the issues that the industry is currently eager to invest R&D resources to address. Summary of the Invention

[0005] In view of this, one purpose of this disclosure is to propose a backlight module and a light guide module that can solve the above problems.

[0006] To achieve the above objectives, according to one embodiment of this disclosure, a backlight module includes a circuit board, a light shield, a light guide plate, a light blocking portion, a first light-emitting element, a second light-emitting element, and a reflective sheet. The light shield is disposed above the circuit board and has a first light-transmitting portion. The light guide plate has a first light-emitting dot area. The first light-emitting dot area is disposed corresponding to the first light-transmitting portion. The first light-emitting dot area includes a plurality of first dots. The first dots are non-uniformly distributed within the area of ​​the first light-emitting dot area. The light blocking portion is disposed adjacent to the light guide plate. The light guide plate, the light blocking portion, and the light shield surround a first receiving area. A light-mixing area is formed between the first receiving area and the first light-emitting dot area. The first light-emitting element and the second light-emitting element are disposed on the circuit board. At least one of the first light-emitting element and the second light-emitting element passes through the first receiving area and emits light towards the first light-emitting dot area. The reflective sheet is disposed between the light guide plate and the circuit board. The first light-emitting element forms a first illumination area along a first light-emitting axis at a first emission angle. The second light-emitting element forms a second illumination area along a second light-emitting axis at a second emission angle. The light guide plate has a generally rectangular light-emitting surface and a first major axis extending along the long side of the light-emitting surface. The first light-emitting element has a second major axis perpendicular to the first light-emitting axis. The second light-emitting element has a third major axis perpendicular to the second light-emitting axis. The second major axis forms an acute angle with the first major axis. The first light-emitting dot area is located within the overlapping area of ​​the first and second irradiation areas.

[0007] In one or more embodiments disclosed herein, the density of the first dots gradually increases along a distribution direction away from the first or second light-emitting element. The distribution direction is parallel to the first light-emitting axis and forms an acute angle with the direction of the first major axis.

[0008] In one or more embodiments disclosed herein, the direction of the second major axis is parallel to the direction of the third major axis.

[0009] In one or more embodiments disclosed herein, the direction of the second major axis is not parallel to the direction of the third major axis.

[0010] In one or more embodiments disclosed herein, the backlight module further includes a third light-emitting element disposed on a circuit board and further having a second accommodating area. The light guide plate further has a second light-emitting dot area separated from the first light-emitting dot area. The third light-emitting element passes through the second accommodating area and emits light toward the second light-emitting dot area. The second light-emitting dot area includes a plurality of second dots, and the second dots are non-uniformly distributed within the range of the second light-emitting dot area.

[0011] In one or more embodiments disclosed herein, a third light-emitting element forms a third illumination area along a third light-emitting axis at a third light-emitting angle, and a second light-emitting dot area is located within the range of the third illumination area.

[0012] In one or more embodiments disclosed herein, the third light-emitting element has a fourth major axis direction perpendicular to the third light-emitting axis. The fourth major axis direction is perpendicular to the first major axis direction.

[0013] In one or more embodiments disclosed herein, the density of the second dots gradually increases along the distribution direction away from the third light-emitting element, and the distribution direction is parallel to the first long axis direction.

[0014] In one or more embodiments disclosed herein, the third light-emitting element has a fourth major axis direction perpendicular to the third light-emitting axis. The fourth major axis direction forms an acute angle with the first major axis direction.

[0015] In one or more embodiments disclosed herein, the density of the second dots gradually increases along the distribution direction away from the third light-emitting element, and the distribution direction forms an acute angle with the first major axis direction.

[0016] In one or more embodiments disclosed herein, the light-shielding plate further includes a second light-transmitting portion disposed corresponding to the second light-emitting dot area.

[0017] In one or more embodiments disclosed herein, the backlight module further includes a light-blocking portion disposed between the first light-emitting dot area and the second light-emitting dot area.

[0018] In one or more embodiments disclosed herein, the light guide plate has a first light-incident surface and a second light-incident surface facing the first light-emitting element and the second light-emitting element, respectively. The first light-incident surface is recessed away from the first light-emitting element, and the second light-incident surface is recessed away from the second light-emitting element.

[0019] In one or more embodiments disclosed herein, the light guide plate has a first light-incident surface and a second light-incident surface facing the first light-emitting element and the second light-emitting element, respectively. The first light-incident surface and the second light-incident surface are serrated surfaces.

[0020] In one or more embodiments disclosed herein, the light guide plate has a first light-incident surface and a second light-incident surface facing the first light-emitting element and the second light-emitting element, respectively. The backlight module further includes a first supplementary light element and a second supplementary light element, and the light guide plate further has a third light-incident surface and a fourth light-incident surface facing the second supplementary light element and the first supplementary light element, respectively. The first supplementary light element and the first light-emitting element are disposed along opposite sides of the first light-emitting dot area, and the second supplementary light element and the second light-emitting element are disposed along opposite sides of the first light-emitting dot area.

[0021] To achieve the above objectives, according to one embodiment of this disclosure, a light guide module includes a light shield, a light guide plate, and a light-blocking portion. The light shield has a first light-transmitting portion. The light guide plate is disposed below the light shield. The light guide plate has a first light-emitting dot area. The first light-emitting dot area is disposed corresponding to the first light-transmitting portion. The light guide plate has a first light-incident surface and a second light-incident surface disposed adjacent to the short side of the light guide plate. The light guide plate is provided with a hollowed-out first receiving area and a second receiving area. The light-blocking portion is disposed below the light shield. The first light-emitting dot area includes a plurality of first dots. The density of the first dots gradually increases along the direction away from the short side. A first normal line is provided on the first light-incident surface, and a second normal line is provided on the second light-incident surface, and the first normal line and the second normal line pass through the first light-emitting dot area. The first normal line and the second normal line respectively form an acute angle with the long side of the light guide plate.

[0022] In one or more embodiments disclosed herein, the first light-incident surface and the second light-incident surface are arc-shaped surfaces.

[0023] In one or more embodiments disclosed herein, the first light-incident surface and the second light-incident surface are sawtooth-shaped surfaces.

[0024] In one or more embodiments disclosed herein, the first light-incident surface and the second light-incident surface are planar.

[0025] In one or more embodiments disclosed herein, the first accommodating area is formed by a light-shielding plate, a first light-incident surface and a light-blocking portion, and the second accommodating area is formed by a light-shielding plate, a second light-incident surface and a light-blocking portion.

[0026] In summary, in the backlight module disclosed herein, since the light-blocking part is disposed between the first and second light-emitting dot areas, the light-blocking part can separate the light emitted by the light-emitting elements used to individually illuminate different light-transmitting parts without mutual interference, thereby allowing the multiple light-emitting patterns displayed in different light-transmitting parts to be presented individually. In the backlight module disclosed herein, since the light guide plate is provided with light-emitting dot areas containing multiple dots, and these dot areas are positioned corresponding to the light-transmitting parts, the light-emitting patterns displayed in the light-transmitting parts can have sufficient brightness. In the backlight module disclosed herein, since the first light-emitting axis of the first light-emitting element and the second light-emitting axis of the second light-emitting element are not parallel to the first long axis direction of the light guide plate, the light-transmitting parts disposed near the edge of the light guide plate can still achieve a uniform light visual effect when illuminated by light-emitting elements of different colors. In the backlight module disclosed herein, when the light emitted by the light-emitting element continues to travel and causes energy attenuation, the density of the dots gradually increases along the distribution direction away from the light-emitting element, ensuring that the brightness of the end of the light-transmitting portion away from the light-emitting element does not decrease due to the attenuation of light energy. In the backlight module disclosed herein, because the light-incident surface of the light guide plate has a light-diffusing structure with an arc-shaped or rough surface, light can diffuse before reaching the light-emitting dot area, thereby shortening the light mixing distance.

[0027] The above description is only used to illustrate the problem to be solved by this disclosure, the technical means to solve the problem, and the effects produced, etc. The specific details of this disclosure will be described in detail in the following implementation method and related drawings. Attached Figure Description

[0028] To make the above and other objects, features, advantages and embodiments disclosed herein more apparent and understandable, the accompanying drawings are described below:

[0029] Figure 1 A perspective view of an electronic device according to one embodiment of the present disclosure is shown;

[0030] Figure 2 A cross-sectional view of a backlight module according to one embodiment of the present disclosure is shown;

[0031] Figure 3 A front view of a first light-emitting element, a second light-emitting element, a light-mixing region, and a light-emitting dot region according to an embodiment of the present disclosure is shown.

[0032] Figure 4 A front view of a light-emitting dot area according to an embodiment of this disclosure is shown;

[0033] Figure 5 A front view of a first light-emitting element, a second light-emitting element, a light-mixing region, and a light-emitting dot region according to an embodiment of the present disclosure is shown.

[0034] Figure 6 A front view of a light-emitting dot area according to an embodiment of this disclosure is shown;

[0035] Figure 7 A cross-sectional view of a backlight module according to one embodiment of the present disclosure is shown;

[0036] Figure 8 A front view of a light-emitting element and a light-transmitting portion according to an embodiment of this disclosure is shown;

[0037] Figure 9 A front view of a light-shielding plate and a light guide plate according to an embodiment of the present disclosure is shown;

[0038] Figure 10 A front view of a light-shielding plate and a light guide plate according to an embodiment of the present disclosure is shown;

[0039] Figure 11 A front view of a light-shielding plate and a light guide plate according to another embodiment of the present disclosure is shown;

[0040] Figure 12 A front view of a light-shielding plate and a light guide plate according to an embodiment of the present disclosure is shown;

[0041] Figure 13 A front view of a light-shielding plate and a light guide plate according to an embodiment of the present disclosure is shown;

[0042] Figure 14 A front view of a light-shielding plate and a light guide plate according to another embodiment of this disclosure is shown.

[0043] [Symbol Explanation]

[0044] 100: Electronic devices

[0045] 110: Host

[0046] 120: Monitor

[0047] 130, 230, 330, 430, 530, 630: Backlight modules

[0048] 131,231: Circuit board

[0049] 132: Light-emitting element

[0050] 132A, 132A', 232A, 332A, 432A, 532A, 632A: First light-emitting element

[0051] 132B, 132B', 232B, 332B, 432B, 532B, 632B: Second light-emitting element

[0052] 133,233: Reflector

[0053] 134,234,334,434,534,634: Light guide plate

[0054] 134A: Light Guide Area

[0055] 134A1,134A1',434A1,534A1,634A1: mixed light area

[0056] 134A2, 134A2', 434A2, 534A2, 634A2: Luminescent dot area

[0057] 134s, 234s: Incident light plane

[0058] 134t, 234t: Emitting surface

[0059] 135,235,335,435,535,635: Light isolation part

[0060] 136,236: Shade

[0061] 232C, 332C: Third light-emitting element

[0062] 234A: First light guide area

[0063] 234A1: First Mixed Light Zone

[0064] 234A2: First luminescent dot area

[0065] 234B: Second light guide area

[0066] 234B1: Second Mixing Zone

[0067] 234B2: Second luminescent dot area

[0068] 332D: Fourth Light Emitting Element

[0069] 332E: Fifth Light-Emitting Element

[0070] 332F: Sixth Light Emitting Element

[0071] 3341: Connecting part

[0072] 434s1, 534s1, 634s1: First incident light plane

[0073] 434s2, 534s2, 634s2: Second incident light plane

[0074] 632C: Second supplementary lighting element

[0075] 632D: First supplementary lighting element

[0076] 634s3: Third incident light plane

[0077] 634s4: Fourth entry light plane

[0078] CP12, CPS1, CPS2: Boundary Points

[0079] D: Distance

[0080] D MS D MS ': Distribution direction

[0081] EA1, EA1': First irradiation zone

[0082] EA12, EA12': Overlapping irradiation zone

[0083] EA2, EA2': Second irradiation zone

[0084] EA3: Third Irradiation Zone

[0085] EX1, EX1': First light-emitting axis

[0086] EX12, EX12': Emitting axes of the overlapping illumination area

[0087] EX2, EX2': Second light-emitting axis

[0088] GR: Grid area

[0089] L: Light

[0090] LN1, LN2: Connection

[0091] LS, LSD, LSU: Long side

[0092] LX 134 LX 234 LX 334 First major axis direction

[0093] LX A LX A ': Second major axis direction

[0094] LX B LX B ': Third major axis direction

[0095] LX C : Fourth major axis direction

[0096] MS,MS': Branch Office

[0097] MS1: First Branch

[0098] MS2: Second Branch

[0099] NM1: First Normal Line

[0100] NM2: Second Normal Line

[0101] OP, OP1, OP11, OP12, OP2, OP3, OP4: Containment Area

[0102] SS, SSL, SSR: Short side

[0103] SX 134 ,SX 234 ,SX 334 : First minor axis direction

[0104] TP: Transmitting part

[0105] TP1: First light-transmitting section

[0106] TP2: Second light-transmitting section

[0107] TP3: Third light-transmitting section

[0108] TP4: Fourth light-transmitting section

[0109] X MS ,X MS ':Extension direction

[0110] θ1,θ1': First emission angle

[0111] θ12, θ12': Overlapping emission angle

[0112] θ2,θ2': Second emission angle

[0113] θ3: Third emission angle Detailed Implementation

[0114] The following describes several embodiments of this disclosure with reference to the accompanying drawings. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this disclosure. That is, in some embodiments of this disclosure, these practical details are not essential. Furthermore, for the sake of simplicity, some conventional structures and elements will be shown in the drawings in a simple schematic manner. The same reference numerals will be used to denote the same or similar elements in all the drawings.

[0115] Please refer to Figure 1 . Figure 1 This is a perspective view of an electronic device 100 according to one embodiment of the present disclosure. Figure 1 As shown, in this embodiment, the electronic device 100 includes a host 110, a touchpad device 115, and a display 120. In this embodiment, as... Figure 1 As shown, the touchpad device 115 further includes a cover plate 117 and a backlight module 130. Since the backlight module 130 is located below the cover plate 117, its specific structure is not shown. Figure 1 The touchpad device 115 is an input device disposed on the host 110, but this disclosure is not limited thereto. In practical applications, the backlight module 130 can also be an electronic product that uses a touchpad as an input or operation interface (e.g., a personal digital assistant, a keyboard with a touchpad, etc.). In other words, the concept of the backlight module 130 disclosed herein can be applied to any electronic product that uses a touchpad as an input or operation interface. The structure, function, and connection and operation relationship between some of the components included in the backlight module 130 will be described in detail below.

[0116] Please refer to Figure 2 . Figure 2 This is a cross-sectional view of a backlight module 130 according to one embodiment of the present disclosure. Figure 2As shown, in this embodiment, the backlight module 130 is exposed through an opening in the housing of the host 110. The backlight module 130 includes a circuit board 131, a light-emitting element 132, a reflective sheet 133, a light guide plate 134, a light-blocking portion 135, and a light-shielding plate 136. The assembly consisting of the light guide plate 134, the light-blocking portion 135, and the light-shielding plate 136 constitutes the light guide module in the backlight module 130. The circuit board 131 may include touch circuitry. The light-emitting element 132 is disposed on the circuit board 131 and configured to emit light L. The reflective sheet 133 is disposed on the circuit board 131 and has a cutout for the light-emitting element 132 to pass through. The light guide plate 134 is disposed below the light-shielding plate 136. In some embodiments, the light guide plate 134 is disposed on the reflective sheet 133. The light guide plate 134 has a light-guiding area 134A. The light guide area 134A is divided into a light mixing area 134A1 and a light-emitting dot area 134A2. For example... Figure 2As shown, the light-emitting dot area 134A2 includes several dots MS. A receiving area OP is surrounded by a light guide plate 134, a light-blocking portion 135, and a light-shielding plate 136. Specifically, the receiving area OP is hollow and is defined by the circuit board 131, the light guide plate 134, the light-blocking portion 135, and the light-shielding plate 136. In other words, the receiving area OP is essentially the space surrounded by the light guide plate 134, the light-blocking portion 135, and the light-shielding plate 136. A light-emitting element 132 is disposed on the circuit board 131 and passes through the receiving area OP, and the light-emitting element 132 emits light towards the light-emitting dot area 134A2. In some embodiments, a reflective sheet 133 is disposed between the light guide plate 134 and the circuit board 131. The light-blocking portion 135 is disposed adjacent to the light guide plate 134 and below the light-shielding plate 136. In some embodiments, the light-blocking portion 135 is located on the reflective sheet 133. In some embodiments, the light guide plate 134 is embedded in the light-blocking portion 135. The light-shielding plate 136 is disposed above the circuit board 131 and has a light-transmitting portion TP. In some embodiments, the light-transmitting portion TP displays a button icon via light L. A light-emitting dot area 134A2 is disposed corresponding to the light-transmitting portion TP, and the receiving area OP is separated from the light-emitting dot area 134A2. Specifically, the light-shielding plate 136 covers the light-emitting element 132, the light guide plate 134, and the light-blocking portion 135, and a light-mixing area 134A1 is provided between the receiving area OP and the light-emitting dot area 134A2. In some embodiments, the light guide plate 134 has a light-incident surface 134s and a light-emitting surface 134t, with the light-emitting surface 134t facing the light-transmitting portion TP. In some embodiments, the light-emitting element 132 is configured to emit light laterally toward the light guide plate 134. Since the light guide plate 134 is embedded in the light-blocking part 135, the light L transmitted within the light guide plate 134 is blocked by the light shield 136 when it reaches the outer edge of the light guide plate 134, thus preventing light leakage. Because a reflective sheet 133 is provided below the light guide plate 134, it can be ensured that the light L transmitted within the light guide plate 134 is emitted only from the light-emitting surface 134t of the light guide plate 134.

[0117] In some embodiments, the receiving area OP may be configured to pass directly through the light guide plate 134, rather than being enclosed by the light blocking part 135. Whether the receiving area OP is passed through or enclosed, this does not depart from the spirit and scope of this disclosure.

[0118] In some implementations, the light-emitting element 132 may be, for example, a light-emitting diode (LED) or other suitable light source.

[0119] In some embodiments, the light-blocking portion 135 is substantially opaque. In some embodiments, the light-blocking portion 135 may be, for example, black polycarbonate (PC) or other opaque materials.

[0120] In some embodiments, the halftone dots (MS) are disposed on the side of the light guide plate 134 away from the light-emitting element 132. In some embodiments, the halftone dots (MS) can be, for example, microstructures or other optical structures. In some embodiments, the halftone dots (MS) are recessed from the bottom surface of the light guide plate 134. However, this disclosure is not intended to limit the number or shape of the halftone dots (MS).

[0121] Please refer to Figure 3 . Figure 3 This is a front view of a backlight module 130 according to an embodiment of the present disclosure, comprising a first light-emitting element 132A, a second light-emitting element 132B, a light-mixing region 134A1, and a light-emitting dot region 134A2. Figure 3 The image is drawn from the perspective of the light-emitting surface 134t of the light guide plate 134. For example... Figure 3 As shown, in this embodiment, the backlight module 130 may include a first light-emitting element 132A and a second light-emitting element 132B. The first light-emitting element 132A forms a first illumination area EA1 along a first light-emitting axis EX1 at a first light-emitting angle θ1, and the second light-emitting element 132B forms a second illumination area EA2 along a second light-emitting axis EX2 at a second light-emitting angle θ2. The overlapping area of ​​the first illumination area EA1 and the second illumination area EA2 forms an overlapping illumination area EA12. Figure 3 As shown, the overlapping illumination area EA12 has an overlapping emission angle θ12 and an overlapping illumination area emission axis EX12. Specifically, the overlapping illumination area emission axis EX12 is essentially the angle bisector of the overlapping emission angle θ12. The luminous dot area 134A2 is located within the overlapping area of ​​the first illumination area EA1 and the second illumination area EA2 (e.g., within the overlapping illumination area EA12). Figure 3 The several dots MS in the luminescent dot area 134A2 shown are non-uniformly distributed within the luminescent dot area 134A2. The light-transmitting part TP is located within the luminescent dot area 134A2.

[0122] In some embodiments, the first light-emitting element 132A and the second light-emitting element 132B emit light L of different colors. In some embodiments, the first light-emitting element 132A and the second light-emitting element 132B do not emit light simultaneously. In this case, since the light-emitting dot area 134A2 is located within the overlapping area of ​​the first irradiation area EA1 and the second irradiation area EA2, the light-transmitting part TP can emit light uniformly when irradiated with light L of different colors.

[0123] Please continue to refer to this. Figure 3 The light guide plate 134 has a first major axis direction LX on the long side LS and short side SS of the light emitting surface 134t. 134 and the first minor axis direction SX 134Specifically, the light guide plate 134 has a first major axis direction LX extending parallel to its long side LS. 134 and the first minor axis direction SX extending parallel to the short side SS of the light guide plate 134. 134 In some implementations, the first major axis direction LX 134 Extending along the long side LS of the light guide plate 134, and along the first short axis direction SX 134 It extends along the short side SS of the light guide plate 134. The first light-emitting element 132A has a second major axis direction LX perpendicular to the first light-emitting axis EX1. A The second light-emitting element 132B has a third major axis direction LX perpendicular to the second light-emitting axis EX2. B The second major axis direction LX A With the third major axis direction LX B The two are parallel and overlap. For example... Figure 3 As shown, the second major axis direction LX A With the first major axis direction LX 134 They are perpendicular to each other, and the direction of the third major axis is LX. B With the first major axis direction LX 134 They are perpendicular to each other.

[0124] Please refer to Figure 4 . Figure 4 This is a front view of the luminescent dot region 134A2 according to an embodiment of the present disclosure. Figure 4 for Figure 3 A magnified view of a portion of the image. For example... Figure 4 As shown, in this embodiment, the dots MS have a density, and the density of the dots MS is along the distribution direction D. MS Change. For example... Figure 3 as well as Figure 4 As shown, the density of the dots MS is along the distribution direction D away from the first light-emitting element 132A or the second light-emitting element 132B. MS It gradually increases in size, and its distribution direction is D. MS Parallel to the first light-emitting axis EX1 or the second light-emitting axis EX2. In other words, the density of the halftone dots MS gradually increases along the direction away from the short side SS. Specifically, the halftone dots MS are sparser on the side closer to the first light-emitting element 132A or the second light-emitting element 132B, and denser on the side away from the first light-emitting element 132A or the second light-emitting element 132B. Furthermore, the halftone dots MS are parallel to the first light-emitting axis EX1 or the second light-emitting axis EX2 in the extending direction X. MS The density is the same, such as Figure 4As shown. This ensures that when the light L emitted by the first light-emitting element 132A or the second light-emitting element 132B continues to travel and causes some energy attenuation, the brightness of the end of the light-transmitting portion TP away from the first light-emitting element 132A or the second light-emitting element 132B does not decrease due to the energy attenuation of the light L.

[0125] Please refer to Figure 5 . Figure 5 This is a front view of the first light-emitting element 132A', the second light-emitting element 132B', the light-mixing area 134A1', and the light-emitting dot area 134A2' of a backlight module 130 according to an embodiment of the present disclosure. Figure 5 The structural configuration of the backlight module 130 and Figure 3 The backlight module 130 has a similar structural configuration, the difference being that... Figure 5 The backlight module 130 includes a first light-emitting element 132A' and a second light-emitting element 132B', and Figure 5 The first light-emitting element 132A' and the second light-emitting element 132B' relative to Figure 3 Both the first light-emitting element 132A and the second light-emitting element 132B are rotated by an angle. For example... Figure 5 As shown, the first light-emitting element 132A' forms a first illumination area EA1' along the first light-emitting axis EX1' at a first light-emitting angle θ1', and the second light-emitting element 132B' forms a second illumination area EA2' along the second light-emitting axis EX2' at a second light-emitting angle θ2'. The overlapping area of ​​the first illumination area EA1' and the second illumination area EA2' forms an overlapping illumination area EA12'. Figure 5 As shown, the overlapping illumination area EA12' has an overlapping emission angle θ12' and an overlapping illumination area emission axis EX12'. The emission dot area 134A2' is located within the overlapping range of the first illumination area EA1' and the second illumination area EA2' (for example, within the overlapping illumination area EA12'). In this case, when the light-transmitting part TP is adjacent to the edge of the light guide plate 134, but because the first light-emitting element 132A' and the second light-emitting element 132B' are rotated by an angle, and the emission dot area 134A2' is still located within the overlapping range of the first illumination area EA1' and the second illumination area EA2', the light-transmitting part TP can emit light uniformly when illuminated by light L of different colors.

[0126] Please continue to refer to this. Figure 5 The first light-emitting element 132A' has a second major axis direction LX perpendicular to the first light-emitting axis EX1'. A The second light-emitting element 132B' has a third major axis direction LX perpendicular to the second light-emitting axis EX2'. B ', where the second major axis direction LX A 'With the third major axis direction LX BThe two are parallel but do not overlap. For example... Figure 5 As shown, the second major axis direction LX A 'With the first major axis direction LX 134 The angle between them is acute.

[0127] In some implementations, the second major axis direction LX A 'and the third major axis direction LX B 'Respectively with the first major axis direction LX 134 The angle between them is acute, and the direction of the second major axis is LX. A 'Not parallel to the third major axis direction LX B '.

[0128] Please refer to Figure 6 . Figure 6 This is a front view of the luminescent dot region 134A2' according to an embodiment of the present disclosure. Figure 6 for Figure 5 A magnified view of a portion of the image. For example... Figure 6 As shown, in this embodiment, the dots MS' have a density, and the density of the dots MS' is along the distribution direction D. MS 'Change.' Figure 5 as well as Figure 6 As shown, the density of the dots MS' is along the distribution direction D away from the first light-emitting element 132A' or the second light-emitting element 132B'. MS 'Gradually increases in size, and the distribution direction is D' MS Parallel to either the first emission axis EX1 or the second emission axis EX2. In other words, the density of the dots MS' gradually increases along the direction away from the shorter side SS. In other words, the distribution direction D... MS 'With the first major axis direction LX 134 The angle between them is acute (e.g., the distribution direction D). MS 'Not parallel to the first major axis direction LX 134 The dot MS' extends in the direction X perpendicular to either the first luminous axis EX1' or the second luminous axis EX2'. MS 'The density is the same, such as Figure 6 As shown. This allows for optimal uniform light emission from the light-transmitting portion TP when the light L emitted by the first light-emitting element 132A' or the second light-emitting element 132B' continues to travel and causes energy attenuation.

[0129] Please refer to Figure 7 as well as Figure 8 . Figure 7 This is a cross-sectional view of a backlight module 230 according to one embodiment of the present disclosure. Figure 8 This is a front view of a backlight module 230 according to one embodiment of the present disclosure. Figure 7 as well as Figure 8The invention discloses a first light-emitting element 232A and a second light-emitting element 232B that emit light by rotating at an angle, and a first long axis direction LX parallel to the light guide plate 234. 234 An embodiment of a backlight module 230 with a third light-emitting element 232C emitting light. This embodiment will be described in detail below.

[0130] Please continue to refer to this. Figure 7 .like Figure 7 As shown, in this embodiment, the backlight module 230 includes a circuit board 231, a first light-emitting element 232A, a second light-emitting element 232B, a third light-emitting element 232C, a reflective sheet 233, a light guide plate 234, a light-blocking part 235, and a light-shielding plate 236. It should be noted that, due to... Figure 7 The structural configuration of the backlight module 230 and Figure 2 The backlight module 130 has a roughly similar structural configuration, so the relevant descriptions of similar components will not be repeated here. For example... Figure 7 As shown, the accommodating area OP1 is located next to one of the light guide plates 234, and the light guide plate 234 has a first light guide area 234A. The accommodating area OP2 is located next to the other light guide plate 234, and the light guide plate 234 has a second light guide area 234B. The first light guide area 234A is divided into a first light mixing area 234A1 and a first light-emitting dot area 234A2, and the second light guide area 234B is divided into a second light mixing area 234B1 and a second light-emitting dot area 234B2. Figure 7 As shown, the first luminescent dot area 234A2 includes several first dots MS1, and the second luminescent dot area 234B2 includes several second dots MS2. The first dots MS1 and the second dots MS2 are non-uniformly distributed within the first luminescent dot area 234A2 and the second luminescent dot area 234B2, respectively. The first luminescent element 232A and the second luminescent element 232B are disposed on the circuit board 231 and pass through the receiving area OP1, and the first luminescent element 232A and the second luminescent element 232B emit light towards the first luminescent dot area 234A2. The third luminescent element 232C is disposed on the circuit board 231 and passes through the receiving area OP2, and the third luminescent element 232C emits light towards the second luminescent dot area 234B2. Two light guide plates 234 are respectively embedded between the light-blocking portions 235. The light-shielding plate 236 is disposed above the circuit board 231 and has a first light-transmitting portion TP1 and a second light-transmitting portion TP2. The first luminescent dot area 234A2 is disposed corresponding to the first light-transmitting portion TP1, and the receiving area OP1 is separated from the first luminescent dot area 234A2. The second luminescent dot area 234B2 is disposed corresponding to the second light-transmitting portion TP2, and the receiving area OP2 is separated from the second luminescent dot area 234B2. In some embodiments, each light guide plate 234 has a light-incident surface 234s and a light-emitting surface 234t.

[0131] Please continue to refer to this. Figure 8 . Figure 8 This further illustrates that the backlight module 230 disclosed herein includes an LX located above the circuit board 231 along a direction not parallel to the first major axis. 234 The first light-emitting element 232A and the second light-emitting element 232B emit light along the direction of the light-emitting axis, and along the direction LX parallel to the first long axis. 234 The third light-emitting element 232C emits light along the direction of the light-emitting axis. Figure 8 The diagram further illustrates several grid areas GR of the circuit board 231, including induction coils (not shown). Specifically, a complete grid area GR is like... Figure 8 The area enclosed by the dashed box in the diagram. A complete grid area GR is configured to accommodate one light-emitting element. Additionally, incomplete grid areas GR also exist at the edges of circuit board 231 (or light guide plate 234). Incomplete grid areas GR do not allow for the accommodation of any light-emitting elements. Figure 7 as well as Figure 8 As shown, the first light-emitting element 232A emits light at a first emission angle θ1' toward the first light-emitting dot area 234A2 to illuminate the first light-transmitting part TP1 and form the first illumination area EA1'; the second light-emitting element 232B emits light at a second emission angle θ2' toward the first light-emitting dot area 234A2 to illuminate the first light-transmitting part TP1 and form the second illumination area EA2'; and the third light-emitting element 232C emits light at a third emission angle θ3 toward the second light-emitting dot area 234B2 to illuminate the second light-transmitting part TP2 and form the third illumination area EA3. Figure 7 as well as Figure 8 As shown, the second light-transmitting portion TP2 is located within the area of ​​the second light-emitting dot region 234B2, and the second light-emitting dot region 234B2 is located within the area of ​​the third irradiation region EA3. In practical applications, such as... Figure 8 As shown, the first light-transmitting portion TP1 is adjacent to the edge of the backlight module 230 (e.g., the long side LS of the light guide plate 234), and the first light-emitting element 232A or the second light-emitting element 232B cannot be positioned in the grid area GR closest to the edge of the backlight module 230 due to space limitations. Specifically, because the grid area GR located at the edge of the circuit board 231 is not a complete grid area GR as shown by the dashed box, the grid area GR located at the edge of the backlight module 230 cannot accommodate any light-emitting element. Accordingly, the first light-emitting element 232A and the second light-emitting element 232B can be rotated by an angle so that the first light-transmitting portion TP1 is located within the overlapping illumination area EA12', and the brightness of the end of the first light-transmitting portion TP1 away from the first light-emitting element 232A or the second light-emitting element 232B will not decrease due to the energy attenuation of light L.

[0132] Please continue to refer to this. Figure 8 .like Figure 8As shown, the first light-emitting element 232A has a direction LX that is not parallel to the first major axis. 234 Second major axis direction LX A The second light-emitting element 232B has a direction LX that is not parallel to the first major axis. 234 The third major axis direction LX B The third light-emitting element 232C has an LX perpendicular to the first major axis direction. 234 And parallel to the first minor axis direction SX 234 The fourth major axis direction LX C .

[0133] In some implementations, such as Figure 8 As shown, the third light-emitting element 232C and the second light-transmitting portion TP2 have the shortest distance D. In some embodiments, the distance D is greater than 5 mm. In some embodiments, the distance between the first light-emitting element 232A and the first light-transmitting portion TP1, or the distance between the second light-emitting element 232B and the first light-transmitting portion TP1, is also greater than 5 mm. In some embodiments, the distance D is the light-mixing distance.

[0134] Please refer to Figure 9 . Figure 9 This is a front view of the light-blocking portion 335 and the light guide plate 334 of a backlight module 330 according to an embodiment of the present disclosure. Figure 9 The invention discloses a first light-emitting element 332A and a second light-emitting element 332B that emit light when rotated by an angle, and a first long axis direction LX parallel to the light guide plate 334. 334 An embodiment of a backlight module 330 with a third light-emitting element 332C emitting light. In this embodiment, the backlight module further includes a connecting portion 3341. The connecting portion 3341 connects to a plurality of light guide plates 334. In some embodiments, the plurality of light guide plates 334 and the connecting portion 3341 are integrally formed. In this embodiment, the backlight module 330 further includes a first light-transmitting portion TP1, a second light-transmitting portion TP2, a third light-transmitting portion TP3, and a fourth light-transmitting portion TP4 with different button symbols. Figure 9 The white area in the diagram illustrates the outline of the light guide plate 334 and the outlines of the receiving areas OP1, OP2, OP3, and OP4. This embodiment will be described in detail below.

[0135] like Figure 9 As shown, the backlight module 330 includes a first light-emitting element 332A and a second light-emitting element 332B passing through the accommodating region OP1, a third light-emitting element 332C passing through the accommodating region OP2, a fourth light-emitting element 332D passing through the accommodating region OP3, and a fifth light-emitting element 332E and a sixth light-emitting element 332F passing through the accommodating region OP4. The second major axis direction LX of the first light-emitting element 332A is shown. A'and the third major axis direction LX of the second light-emitting element 332B B 'With the first major axis direction LX 334 The angle between them is acute. The fourth major axis direction LX of the third light-emitting element 332C. C With the first major axis direction LX 334 Perpendicular to and in line with the first minor axis direction SX 334 parallel.

[0136] In some other embodiments, the third light-emitting element 332C can be similar to Figure 5 as well as Figure 6 The second light-transmitting section TP2 is illuminated by rotating it at an angle, as shown. Specifically, in the fourth major axis direction LX C With the first major axis direction LX 334 The angle between them is acute.

[0137] In some implementations, when the fourth major axis direction LX C perpendicular to the first major axis direction LX 334 The density of the second dot MS2 gradually increases along the distribution direction away from the third light-emitting element 332C, and this distribution direction is parallel to the first major axis direction LX. 334 In some other implementations, when the fourth major axis direction LX C With the first major axis direction LX 334 The two dots form an acute angle, and the density distribution direction of the second dot MS2 is perpendicular to the first major axis direction LX. 334 The angle between them is acute.

[0138] Please refer to Figure 10 . Figure 10 This is a front view of a portion of the backlight module 430 according to one embodiment of the present disclosure. It should be noted that the structural configuration of the backlight module 430 is generally similar to that of the backlight modules 130, 230, and 330; therefore, the connection relationships between the components will not be described further here. Figure 10 As shown, in this embodiment, the backlight module 430 includes a first light-emitting element 432A, a second light-emitting element 432B, a light guide plate 434, a light-blocking portion 435, and a first light-transmitting portion TP1. The light guide plate 434 has a hollowed-out receiving area OP1, through which the first light-emitting element 432A and the second light-emitting element 432B pass. The light guide plate 434 has a first light-incident surface 434s1 and a second light-incident surface 434s2 facing the first light-emitting element 432A and the second light-emitting element 432B, respectively. The light guide plate 434 has a light-mixing area 434A1 and a light-emitting dot area 434A2. More specifically, the light-emitting dot area 434A2 is represented by a dotted mesh, and the area outside the light-emitting dot area 434A2 is the light-mixing area 434A1.

[0139] Please continue to refer to this. Figure 10 In some embodiments, the light guide plate 434 has a long side LSU, a short side SSL, a long side LSD, and a short side SSR, resulting in the light guide plate 434 having a generally rectangular shape, such as... Figure 10 As shown. In some embodiments, the first light-incident surface 434s1 and the second light-incident surface 434s2 are disposed adjacent to the short side SSL of the light guide plate 434. In some embodiments, the first light-incident surface 434s1 and the second light-incident surface 434s2 are located on the short side SSL of the light guide plate 434. In some embodiments, the location where the first light-incident surface 434s1 and the second light-incident surface 434s2 connect has a dividing point CP12, the location where the first light-incident surface 434s1 connects to the long side LSU has a dividing point CPS1, and the location where the second light-incident surface 434s2 intersects with the extension line of the long side LSD has a dividing point CPS2. Figure 10 As shown, boundary point CP12 and boundary point CPS1 form a line LN1, and the perpendicular bisector of line LN1 defines the first normal NM1. Boundary point CP12 and boundary point CPS2 form a line LN2, and the perpendicular bisector of line LN2 defines the second normal NM2. In this embodiment, Figure 10 The structural configuration of the first light-incident surface 434s1 and the second light-incident surface 434s2 shown is such that the first normal NM1 located on the first light-incident surface 434s1 and the second normal NM2 located on the second light-incident surface 434s2 both pass through the light-emitting dot region 434A2.

[0140] In some embodiments, the first normal NM1 and the second normal NM2 are not parallel. In some embodiments, the first normal NM1 and the second normal NM2 form acute angles with the long side LSU (or long side LSD) of the light guide plate 434.

[0141] In some embodiments, the backlight module 430 includes a light shield similar to the light shield 136 or light shield 236 described above. Since the configuration of the light shield in the backlight module 430 is similar to that of light shield 136 or light shield 236, it will not be described again here. Figure 10 As shown, in some embodiments, the receiving area OP1 can be further divided into receiving area OP11 and receiving area OP12. Specifically, the aforementioned light-shielding plate, the first light-incident surface 434s1, and the light-blocking portion 435 surround the receiving area OP11, and the aforementioned light-shielding plate, the second light-incident surface 434s2, and the light-blocking portion 435 surround the receiving area OP12. In some embodiments, the receiving area OP11 and the receiving area OP12 are interconnected, such as... Figure 10As shown. In some other embodiments, the receiving area OP11 and the receiving area OP12 are not connected to each other. Specifically, when the dividing point CP12 contacts the light-blocking part 435, the receiving area OP11 and the receiving area OP12 are separated, thereby making the receiving area OP11 and the receiving area OP12 not connected to each other.

[0142] In some embodiments, the receiving areas OP11 and OP12 may be configured to pass directly through the light guide plate 434, rather than being enclosed by the light blocking portion 435. Whether the receiving areas OP11 and OP12 are passed through or enclosed, this does not depart from the spirit and scope of this disclosure.

[0143] In some implementations, such as Figure 10 As shown, the first light-incident surface 434s1 is recessed away from the first light-emitting element 432A, and the second light-incident surface 434s2 is recessed away from the second light-emitting element 432B. In some embodiments, the first light-incident surface 434s1 and the second light-incident surface 434s2 may be, for example, an arc-shaped surface or other similar curved surface.

[0144] In some implementations, such as Figure 10 As shown, the luminescent dot areas 434A2 are distributed based on the shape of the first light-transmitting portion TP1. Specifically, the luminescent dot areas 434A2 have a similar shape to the first light-transmitting portion TP1. Figure 10 As shown, when viewed from the front, the first light-transmitting part TP1 is within the area of ​​the luminescent dot region 434A2.

[0145] With the above structural configuration, such as Figure 10 As shown, when the first light-emitting element 432A and the second light-emitting element 432B emit light towards the first light-receiving surface 434s1 and the second light-receiving surface 434s2 respectively, the first light-receiving surface 434s1 and the second light-receiving surface 434s2 can diffuse the light. Since the first light-receiving surface 434s1 and the second light-receiving surface 434s2 can diffuse the light, the distance between the first light-emitting element 432A or the second light-emitting element 432B and the first light-transmitting part TP1 can be shortened (i.e., the light mixing distance can be shortened), thereby achieving the effect of saving space. In addition, the structural configuration of the first light-receiving surface 434s1 and the second light-receiving surface 434s2 ensures that no matter which direction the first light-emitting element 432A and the second light-receiving element 432B emit light towards the first light-receiving surface 434s1 and the second light-receiving surface 434s2 respectively, the light can be diffused through the first light-receiving surface 434s1 and the second light-receiving surface 434s2.

[0146] Please refer to Figure 11 . Figure 11 This is a front view of a portion of the backlight module 430 according to another embodiment of this disclosure. Figure 11 The structural configuration of the backlight module 430 and Figure 10 The backlight module 430 has a similar structural configuration, the difference being that... Figure 11 The backlight module 430 has a light-emitting dot area 434A2 containing several dots MS that are non-uniformly distributed. For example, such as Figure 11 As shown, the density of the halftone dots MS gradually increases along the direction away from the first light-emitting element 432A or the second light-emitting element 432B. In some embodiments, the density of the halftone dots MS gradually increases along the direction away from the short side SSL.

[0147] In some other embodiments, the first light-incident surface 434s1 and the second light-incident surface 434s2 may be, for example, planar surfaces. In other words, in this case, the first light-incident surface 434s1 and the second light-incident surface 434s2 coincide with the connecting line LN1 and the connecting line LN2, respectively.

[0148] Please refer to Figure 12 . Figure 12 This is a front view of a portion of the backlight module 530 according to one embodiment of the present disclosure. It should be noted that the structural configuration of the backlight module 530 is generally similar to that of the backlight module 430, therefore the connection relationships between the components will not be described again here. The difference between the backlight module 530 and the backlight module 430 is that the first light-incident surface 534s1 and the second light-incident surface 534s2 of the backlight module 530 are rough surfaces rather than curved surfaces. Figure 12 As shown, in this embodiment, the backlight module 530 includes a first light-emitting element 532A, a second light-emitting element 532B, a light guide plate 534, a light-blocking portion 535, and a first light-transmitting portion TP1. The light guide plate 534 has a first light-incident surface 534s1 and a second light-incident surface 534s2 facing the first light-emitting element 532A and the second light-emitting element 532B, respectively. The light guide plate 534 has a light-mixing region 534A1 and a light-emitting dot region 534A2.

[0149] In some implementations, such as Figure 12 As shown, the first light-incident surface 534s1 and the second light-incident surface 534s2 can be, for example, a zigzag surface or other similar rough surfaces.

[0150] In some implementations, such as Figure 12 As shown, the light-emitting dot area 534A2 is also distributed based on the shape of the first light-transmitting part TP1, and when viewed from the front, the first light-transmitting part TP1 is within the range of the light-emitting dot area 534A2.

[0151] With the above structural configuration, such as Figure 12As shown, when the first light-emitting element 532A and the second light-emitting element 532B emit light toward the rough first light-incident surface 534s1 and the second light-incident surface 534s2 respectively, the first light-incident surface 534s1 and the second light-incident surface 534s2 can also diffuse the light. Since the first light-incident surface 534s1 and the second light-incident surface 534s2 can diffuse the light, the distance between the first light-emitting element 532A or the second light-emitting element 532B and the first light-transmitting part TP1 can be shortened (i.e., the light mixing distance can be shortened), thereby achieving the effect of saving space.

[0152] Please refer to Figure 13 . Figure 13 This is a front view of a portion of a backlight module 630 according to one embodiment of this disclosure. Figure 13 As shown, in this embodiment, the backlight module 630 includes a first light-emitting element 632A, a second light-emitting element 632B, a second supplementary light element 632C, a first supplementary light element 632D, a light guide plate 634, a light-blocking portion 635, and a first light-transmitting portion TP1. The light guide plate 634 is provided with a hollowed-out receiving area OP1 and a receiving area OP1', located on both sides of the light guide plate 634. The first light-emitting element 632A and the second light-emitting element 632B pass through the receiving area OP1, and the second supplementary light element 632C and the first supplementary light element 632D pass through the receiving area OP1'. Both the first light-emitting element 632A and the first supplementary light element 632D, as well as the second light-emitting element 632B and the second supplementary light element 632C, emit light towards each other and simultaneously emit light towards the first light-transmitting portion TP1. Figure 13 As shown, the light guide plate 634 has a first light-incident surface 634s1, a second light-incident surface 634s2, a third light-incident surface 634s3, and a fourth light-incident surface 634s4 facing the first light-emitting element 632A, the second light-emitting element 632B, the second supplementary light-emitting element 632C, and the first supplementary light-emitting element 632D, respectively. The light guide plate 634 has a light-mixing area 634A1 and a light-emitting dot area 634A2. More specifically, the light-emitting dot area 634A2 is represented by a dotted halftone pattern, and the area outside the light-emitting dot area 634A2 is the light-mixing area 634A1. In some embodiments, the first supplementary light-emitting element 632D and the first light-emitting element 632A are arranged along opposite sides of the light-emitting dot area 634A2, and the second supplementary light-emitting element 632C and the second light-emitting element 632B are also arranged along opposite sides of the light-emitting dot area 634A2.

[0153] In some embodiments, the receiving areas OP1 and OP1' may be configured to pass directly through the light guide plate 634, rather than being enclosed by the light blocking portion 635. Whether the receiving areas OP1 and OP1' are passed through or enclosed, this does not depart from the spirit and scope of this disclosure.

[0154] In some embodiments, the first light-emitting element 632A and the first supplementary light element 632D emit light of the same color, the second light-emitting element 632B and the second supplementary light element 632C emit light of the same color, and the first light-emitting element 632A and the second light-emitting element 632B emit light of different colors. In some embodiments, the first light-emitting element 632A and the first supplementary light element 632D emit light simultaneously, the second light-emitting element 632B and the second supplementary light element 632C emit light simultaneously, and the first light-emitting element 632A and the second light-emitting element 632B do not emit light simultaneously.

[0155] In some implementations, such as Figure 13 As shown, the first light-incident surface 634s1 and the second light-incident surface 634s2 of the light guide plate 634 are similar to the first light-incident surface 434s1 and the second light-incident surface 434s2 of the light guide plate 434, which can be, for example, an arc-shaped surface or other similar curved surface.

[0156] In some implementations, such as Figure 13 As shown, the light-emitting dot area 634A2 is also distributed based on the shape of the first light-transmitting part TP1, and when viewed from the front, the first light-transmitting part TP1 is within the range of the light-emitting dot area 634A2.

[0157] With the above structural configuration, such as Figure 13 As shown, the first light-incident surface 634s1, the second light-incident surface 634s2, the third light-incident surface 634s3, and the fourth light-incident surface 634s4 can diffuse light. Therefore, the distance between the first light-emitting element 632A or the second light-emitting element 632B and the first light-transmitting part TP1, as well as the distance between the second supplementary light element 632C or the first supplementary light element 632D and the first light-transmitting part TP1, can be shortened (i.e., the light mixing distance can be shortened), thereby achieving the effect of saving space. In addition, since the first light-emitting element 632A and the first supplementary light element 632D, as well as the second light-emitting element 632B and the second supplementary light element 632C, are respectively arranged along opposite sides of the light-emitting dot area 634A2 and emit light towards each other (for example, along the diagonal direction of the light guide plate 634), the first supplementary light element 632D and the second supplementary light element 632C can increase the brightness of the end of the first light-transmitting portion TP1 away from the first light-emitting element 632A and the second light-emitting element 632B, thereby enabling the first light-transmitting portion TP1 to emit light uniformly. In practical applications, when the first light-transmitting portion TP1 switches between different colors of light, the first light-transmitting portion TP1 can emit light uniformly with the help of the first supplementary light element 632D and the second supplementary light element 632C.

[0158] Please refer to Figure 14 . Figure 14This is a front view of a portion of the backlight module 630 according to another embodiment of this disclosure. Figure 14 The structural configuration of the backlight module 630 and Figure 13 The backlight module 630 has a similar structural configuration, the difference being that... Figure 14 The backlight module 630 only includes a first light-emitting element 632A and a first supplementary light element 632D, but does not include a second light-emitting element 632B and a second supplementary light element 632C. In practical applications, such as Figure 14 As shown, when the first light-transmitting part TP1 only needs to emit monochromatic light, the backlight module 630 can only be provided with a first light-emitting element 632A and a first supplementary light element 632D, and the first light-emitting element 632A and the first supplementary light element 632D can be respectively disposed on one side of the first light-incident surface 634s1 and the fourth light-incident surface 634s4. Similarly, the first light-emitting element 632A and the first supplementary light element 632D can also be respectively disposed on one side of the second light-incident surface 634s2 and the third light-incident surface 634s3.

[0159] From the detailed description of the specific embodiments disclosed above, it is clear that in the backlight module of this disclosure, since the light-blocking part is disposed between the first light-emitting dot area and the second light-emitting dot area, the light-blocking part can separate the light emitted by the light-emitting elements used to individually illuminate different light-transmitting parts without mutual interference, thereby allowing the several light-emitting patterns displayed in different light-transmitting parts to be presented individually. In the backlight module of this disclosure, since the light guide plate is provided with a light-emitting dot area containing several dots, and the light-emitting dot area is disposed corresponding to the light-transmitting part, the light-emitting pattern displayed in the light-transmitting part can have sufficient brightness. In the backlight module of this disclosure, since the first light-emitting axis of the first light-emitting element and the second light-emitting axis of the second light-emitting element are not parallel to the first long axis direction of the light guide plate, the light-transmitting parts disposed near the edge of the light guide plate can still achieve a uniform light visual effect when illuminated by light-emitting elements of different colors. In the backlight module disclosed herein, when the light emitted by the light-emitting element continues to travel and causes energy attenuation, the density of the dots gradually increases along the distribution direction away from the light-emitting element, ensuring that the brightness of the end of the light-transmitting portion away from the light-emitting element does not decrease due to the attenuation of light energy. In the backlight module disclosed herein, because the light-incident surface of the light guide plate has a light-diffusing structure with an arc-shaped or rough surface, light can diffuse before reaching the light-emitting dot area, thereby shortening the light mixing distance.

[0160] Although the present disclosure has been described above with reference to embodiments, it is not intended to limit the present disclosure. Any person skilled in the art may make various modifications and refinements without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the appended claims.

Claims

1. A backlight module, characterized in that, Include: Circuit board; A light-shielding plate is disposed above the circuit board and has a first light-transmitting portion; A light guide plate has a first light-emitting dot area, which is disposed corresponding to the first light-transmitting part. The first light-emitting dot area includes a plurality of first dots, and the plurality of first dots are non-uniformly distributed within the range of the first light-emitting dot area. A light-blocking section is disposed adjacent to the light guide plate, wherein the light guide plate, the light-blocking section and the light-shielding plate surround a first receiving area, and a light mixing area is formed between the first receiving area and the first light-emitting dot area; A first light-emitting element and a second light-emitting element are disposed on the circuit board, and at least one of the first light-emitting element and the second light-emitting element passes through the first receiving area and emits light toward the first light-emitting dot area; as well as A reflective sheet is disposed between the light guide plate and the circuit board. The first light-emitting element forms a first illumination area along a first light-emitting axis at a first light-emitting angle, and the second light-emitting element forms a second illumination area along a second light-emitting axis at a second light-emitting angle. The light guide plate has a generally rectangular light-emitting surface, and the light guide plate has a first major axis extending along the long side of the light-emitting surface. The first light-emitting element has a second major axis perpendicular to the first light-emitting axis, and the second light-emitting element has a third major axis perpendicular to the second light-emitting axis, with the second major axis forming an acute angle with the first major axis. The first luminescent dot area is located within the overlapping area of ​​the first irradiation area and the second irradiation area.

2. The backlight module according to claim 1, characterized in that, The density of the plurality of first dots gradually increases along the distribution direction away from the first light-emitting element or the second light-emitting element, and the distribution direction is parallel to the first light-emitting axis and forms an acute angle with the first long axis direction.

3. The backlight module according to claim 1, characterized in that, The second major axis direction is parallel to the third major axis direction.

4. The backlight module according to claim 1, characterized in that, The direction of the second major axis is not parallel to the direction of the third major axis.

5. The backlight module according to claim 1, characterized in that, The backlight module further includes a third light-emitting element disposed on the circuit board, and the backlight module further has a second accommodating area. The light guide plate further has a second light-emitting dot area separated from the first light-emitting dot area. The third light-emitting element passes through the second accommodating area and emits light toward the second light-emitting dot area. The second light-emitting dot area includes a plurality of second dots, and the plurality of second dots are non-uniformly distributed within the range of the second light-emitting dot area.

6. The backlight module according to claim 5, characterized in that, The third light-emitting element forms a third illumination area along the third light-emitting axis at a third light-emitting angle, and the second light-emitting dot area is located within the range of the third illumination area.

7. The backlight module according to claim 6, characterized in that, The third light-emitting element has a fourth major axis direction perpendicular to the third light-emitting axis, wherein the fourth major axis direction is perpendicular to the first major axis direction.

8. The backlight module according to claim 7, characterized in that, The density of the plurality of second dots gradually increases along the distribution direction away from the third light-emitting element, and the distribution direction is parallel to the first long axis direction.

9. The backlight module according to claim 6, characterized in that, The third light-emitting element has a fourth major axis direction perpendicular to the third light-emitting axis, wherein the fourth major axis direction forms an acute angle with the first major axis direction.

10. The backlight module according to claim 9, characterized in that, The density of the plurality of second dots gradually increases along the distribution direction away from the third light-emitting element, and the distribution direction forms an acute angle with the first major axis direction.

11. The backlight module according to claim 5, characterized in that, The light-shielding plate further includes a second light-transmitting portion disposed corresponding to the second light-emitting dot area.

12. The backlight module according to claim 5, characterized in that, The light-blocking part is disposed between the first luminescent dot area and the second luminescent dot area.

13. The backlight module according to claim 1, characterized in that, The light guide plate has a first light-incident surface and a second light-incident surface facing the first light-emitting element and the second light-emitting element, respectively, and the first light-incident surface is recessed away from the first light-emitting element, and the second light-incident surface is recessed away from the second light-emitting element.

14. The backlight module according to claim 1, characterized in that, The light guide plate has a first light-incident surface and a second light-incident surface facing the first light-emitting element and the second light-emitting element, respectively, and the first light-incident surface and the second light-incident surface are sawtooth surfaces.

15. The backlight module according to claim 1, characterized in that, The light guide plate has a first light-incident surface and a second light-incident surface facing the first light-emitting element and the second light-emitting element, respectively. The backlight module further includes a first supplementary light element and a second supplementary light element. The light guide plate further has a third light-incident surface and a fourth light-incident surface facing the second supplementary light element and the first supplementary light element, respectively. The first supplementary light element and the first light-emitting element are arranged along opposite sides of the first light-emitting dot area, and the second supplementary light element and the second light-emitting element are arranged along opposite sides of the first light-emitting dot area.

16. A light guide module, characterized in that, Include: A light-blocking plate having a first light-transmitting section; A light guide plate is disposed below the light shield, and the light guide plate has a first light-emitting dot area, the first light-emitting dot area being disposed corresponding to the first light-transmitting portion, wherein the light guide plate has a first light-incident surface and a second light-incident surface disposed on the short side adjacent to the light guide plate, wherein the light guide plate is provided with a hollowed-out first receiving area and a second receiving area; and The light-blocking part is located below the light-shielding plate. The first luminescent dot region comprises a plurality of first dots, the density of which gradually increases along the direction away from the shorter side. The first incident light surface has a first normal, the second incident light surface has a second normal, and both the first normal and the second normal pass through the first light-emitting dot region. The first normal and the second normal form acute angles with the long side of the light guide plate, respectively.

17. The light guide module according to claim 16, characterized in that, The first light-incident surface and the second light-incident surface are arc-shaped surfaces.

18. The light guide module according to claim 16, characterized in that, The first light-incident surface and the second light-incident surface are sawtooth-shaped surfaces.

19. The light guide module according to claim 16, characterized in that, The first light-incident surface and the second light-incident surface are planar.

20. The light guide module according to claim 16, characterized in that, The first accommodating area is formed by the light-shielding plate, the first light-incident surface and the light-blocking part, and the second accommodating area is formed by the light-shielding plate, the second light-incident surface and the light-blocking part.

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