Backlight module capable of achieving dynamic light-emitting effect

Abstract

The invention provides a backlight module capable of achieving a dynamic light-emitting effect, which comprises a light guide plate, the light guide plate is provided with a light incident side, the upper surface or the lower surface of the light guide plate is provided with directive lattice points which are arranged to form lattice point patterns, the directive lattice points are of spindle-shaped sunken structures and are in a state of extending along the directions of a long axis and a short axis, the length of each directive lattice point is X, the width of each directive lattice point is Y, and X / Y is greater than or equal to 3, the included angle between the side wall side line of the section of the directive lattice point in the long-axis direction and the vertical line is 80 + / -5 degrees, and the included angle between the side wall side line of the section of the directive lattice point in the short-axis direction and the vertical line is 50 + / -5 degrees; the light-emitting diode is arranged corresponding to the incident light side and forms different incident light angles relative to the light guide plate; the sequential control circuit is electrically connected with the light-emitting diode. When the light-emitting diode is driven by the time sequence control circuit to be lightened, the directive lattice points generate different brightness according to light entering in different directions, so that the lattice point pattern forms a dynamic light-emitting effect.

Description

Technical Field

[0001] The invention relates to the field of light guide module products, and in particular to a backlight module capable of achieving a dynamic luminous effect. Background Art

[0002] Backlight modules are a common optical product, commonly used in displays, control panels or lighting equipment. When a backlight module is used in a display, its light output must have uniform and sufficient brightness to facilitate the uniform distribution of light on the display panel, thereby displaying a clear picture. In other backlight module applications, the design of the backlight module varies depending on the type and property requirements of the electronic device, such as realizing the display of a specific pattern, or further providing a dynamic lighting effect, etc., to provide more changes in aesthetics and functionality.

[0003] The dynamic light emission of backlight modules plays an increasingly important role in modern electronic products, and the demand comes from the dual demand for functionality and aesthetics. The most significant demand comes from home appliances, smart devices, and high-end control panels, which promote the design trend towards a more interactive and diversified direction. Therefore, the public's requirements for backlight effects are no longer limited to simple static light sources, but hope to present richer pattern changes and visual effects through dynamic light and shadow, thereby increasing the user experience and improving the market competitiveness of products. In this context, how to provide backlight modules that meet market demand is indeed a topic that needs to be solved urgently.

[0004] In view of this, the inventor, based on his rich experience in related industries, conceived and proposed a backlight module that can achieve a dynamic lighting effect, so as to provide an optical product that has both aesthetics and excellent light output performance. Summary of the invention

[0005] The purpose of the present invention is to provide a backlight module that can achieve a dynamic luminous effect, and to realize a dynamic luminous pattern by using a special dot design in combination with a sequential light source.

[0006] To achieve the above-mentioned purpose, the present invention discloses, in one embodiment, a backlight module capable of achieving a dynamic luminous effect, comprising: a light guide plate having at least one light incident side, and a plurality of directional dots are arranged on the upper surface or the lower surface of the light guide plate, and the directional dots are arranged to form a dot pattern; wherein each of the directional dots is a spindle-shaped concave structure extending along a long axis direction and a short axis direction, the length of each of the directional dots is X, the width is Y, and X / Y ≥ 3, and the angle between the side wall edge line of each of the directional dots in the cross section in the long axis direction and the vertical line is 80 ± 5 degrees, the angle between the sidewall edge line of each directional dot in the cross section in the direction of the short axis and the vertical line is 50±5 degrees; a plurality of light-emitting diodes are respectively arranged corresponding to the light-entering sides, and the light-emitting diodes form different incident light angles relative to the light guide plate; and a timing control circuit is electrically connected to the light-emitting diodes to control the driving timing of the light-emitting diodes; wherein, when the light-emitting diodes are driven and lit by the timing control circuit, the directional dots produce different brightness according to the incident light from different directions, so that the dot pattern forms a dynamic lighting effect according to the driving timing of the light-emitting diodes. Accordingly, by utilizing the directional dot structure design with different structural performances in the long axis and the short axis in combination with the application of surrounding timing light sources, a dynamic lighting effect can be achieved by switching the light output from different viewing angles.

[0007] In another embodiment, the light incident side has multiple bending segments to form multiple light incident surfaces, and the light incident surfaces form different angles with the horizontal plane respectively. Each light emitting diode is arranged corresponding to each light incident surface, and different incident light angles are formed relative to the light guide plate according to the angle between each light incident surface and the horizontal plane. Accordingly, the light emitting diode can provide the required light incident angle relative to the light guide plate more accurately, and it is also simpler and more convenient to assemble.

[0008] Furthermore, in yet another embodiment, the light emitting diodes have different luminous colors, which can enhance the variability of the luminous effect.

[0009] In addition, regarding suitable dimensions for practical use, 15≤X / Y≤17 is disclosed in one embodiment.

[0010] Furthermore, based on the above-mentioned embodiment, in another embodiment, it is disclosed that the cross section of each of the directional dots in the short axis direction is V-shaped, so as to achieve a better luminous effect by utilizing the V-shaped structure and the above-mentioned aspect ratio.

[0011] Alternatively, another embodiment discloses that another suitable dimension is 3.2≤X / Y≤4.2.

[0012] In summary, the backlight module of the present invention that can achieve dynamic lighting effects, through the spindle-shaped recessed dots designed with different angles in the long and short axis directions, makes the light of the light-emitting diode enter from different directions of the directional dots, and produces different brightness. With the timing lighting driving light-emitting diodes, the dot pattern formed by the directional dot arrangement can achieve dynamic lighting effects according to the brightness changes. Furthermore, the present invention also proposes other additional detailed technical features, as described in the above paragraphs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 , is a schematic diagram of a partial structure of a backlight module according to an embodiment of the present invention.

[0014] Figure 2 , which is a schematic diagram of the long-axis and short-axis cross-sections of a directional grid point according to an embodiment of the present invention.

[0015] Figure 3 , which is a schematic diagram of the backlight module structure and application according to an embodiment of the present invention.

[0016] Figure 4 , which is a schematic diagram of the backlight module structure and application in another implementation state of an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings.

[0018] As mentioned above, in view of the changes in the market demand for backlight module products, the inventor proposes a backlight module that can achieve a dynamic lighting effect by combining a dot structure design with a technical architecture of a timing-controlled light source. The backlight module is described in detail below through text and diagrams. The structural dimensions, proportions, sizes, shapes or application states shown in each figure are only for illustration, used to illustrate the technical features of the present invention, and do not represent the actual structural design. This is hereby explained.

[0019] See also Figure 1 and Figure 2 , which are schematic diagrams of the partial structure of a backlight module and schematic diagrams of the cross-section of the directional network points in the long axis and short axis of an embodiment of the present invention. The present invention discloses a backlight module 1 capable of achieving a dynamic luminous effect, comprising a light guide plate 10, a plurality of light emitting diodes 11 and a timing control circuit 12.

[0020] The light guide plate 10 has at least one light incident side 101, and a plurality of directional dots 102 are arranged on the upper surface or the lower surface of the light guide plate 10. The directional dots 102 are arranged to form a dot pattern P, wherein the directional dots 102 can be designed according to the predetermined dot pattern P, so that the directional dots 102 are arranged on the light guide plate 10 at various angles. Each directional dot 102 is a spindle-shaped concave structure extending along a long axis direction A and a short axis direction B. The length of each directional dot 102 is X, the width is Y, and X / Y ≥ 3. The angle θ1 between the side wall edge line of each directional dot 102 in the cross section of the long axis direction A and the vertical line is 80±5 degrees, which can be referred to Figure 2 (a), the angle θ2 between the sidewall edge line of each directional grid point 102 in the cross section of the short axis direction B and the vertical line is 50±5 degrees, which can be referred to Figure 2 (b). The light-emitting diodes 11 are respectively arranged corresponding to the light-entering sides 101, and these light-emitting diodes 11 form different incident light angles relative to the light guide plate 10. The number of the aforementioned light-entering sides 101 can be one or more than two, and when the number of the light-entering sides 101 is more than two, these light-entering sides 101 can be arranged in a non-parallel state. The timing control circuit 12 is electrically connected to the light-emitting diodes 11 to control the driving timing of the light-emitting diodes 11. Figure 1 The timing control circuit 12 is used as an example to illustrate a circuit board with various control-related and drive-related electronic components. When the light-emitting diode 11 is driven to light up by the timing control circuit 12, the directional dots 102 generate different brightness according to the incident light from different directions, so that the dot pattern P forms a dynamic lighting effect according to the driving timing of the light-emitting diode 11.

[0021] By having the spindle-shaped directional dots 102 designed with different angles in the long axis direction A and the short axis direction B, the light-emitting diode 11 can produce different brightness when lighting the directional dots 102 in different directions. In this way, combined with the lighting control of the timing control circuit 12, the dot pattern P formed by the arrangement of the directional dots 102 can produce a dynamic light-emitting effect. More specifically, when the light-emitting diode 11 is incident from the long axis direction A, a higher light-emitting density can be achieved, forming a relatively brightest light-emitting state; if the light-emitting diode 11 is incident from the short axis direction B, it will have a lower light-emitting density and form a relatively darkest light-emitting state. When the light-emitting diode 11 is incident from other angles, the light-emitting brightness varies according to the change of the angle. In this way, by using various different incident light angles and driving timings, the dot pattern P can produce a dynamic light-emitting effect during operation.

[0022] For further information, please refer to Figure 3, which is a schematic diagram of the backlight module structure and application of an embodiment of the present invention. Regarding the structure of the light guide plate 10, the light incident side 101 can be provided with multiple bending sections 1011 to form multiple light incident surfaces 1012, and the light incident surfaces 1012 respectively form different angles with the horizontal plane, and each light-emitting diode 11 is arranged corresponding to each light incident surface 1012, and different incident light angles are formed relative to the light guide plate 10 according to the angle between each light incident surface 1012 and the horizontal plane. Accordingly, it is easier to set the light-emitting diode 11, that is, through different angles of the light incident surface 1012, when the light-emitting diode 11 is arranged corresponding to the light incident surface 1012, it can naturally provide incident light at different angles relative to the light guide plate 10. Among them, each light incident surface 1012 can be provided with one light-emitting diode 11, or more than two light-emitting diodes 11 can be provided, and both can be adjusted according to the light output requirements. It is also worth mentioning that, in a structural implementation state, a structure such as a diffusion sheet or a protection sheet can be added to the upper side of the light guide plate 10 to improve the uniformity of light output or to achieve the effect of protecting the light guide plate.

[0023] In addition, considering the variability of the light emitting effect, the light emitting diode 11 can have different light emitting colors, so as to achieve a dynamic light emitting effect while also having color changes.

[0024] The following is an explanation of a suitable structural implementation state of the backlight module 1. Please continue to refer to Figure 3 , the aspect ratio of the directional dot 102, that is, the ratio of X to Y, is 15≤X / Y≤17, and the cross section of each directional dot 102 in the short axis direction B is V-shaped, each light incident surface 1012 has three light emitting diodes 11, and the dot pattern P is a butterfly pattern. When any light emitting diode 11 or multiple light emitting diodes 11 with the same light incident angle relative to the light guide plate 10 are driven by the timing control circuit 12, the directional dot 102 at different positions in the dot pattern P will produce different brightness performances according to the angle of the light received, thereby forming a first dot pattern P light emitting state S11, such as Figure 3 (a), when another or other LEDs 11 are lit, the directional dots 102 at different positions in the dot pattern P will produce different brightness performances according to the light angle formed by the LED 11 to the directional dots 102, thereby forming another dot lighting state S12, such as Figure 3 (b), after the LEDs 11 are continuously lit according to a predetermined timing, the dot pattern P can be adjusted according to the different lighting states S11 to S16, such as Figure 3 (a) to (f) produce a dynamic luminous effect visually. Figure 3 In (a) to (f), the driven light emitting diode 11 is colored in, and the timing driving circuit 12 is omitted and explained together.

[0025] Please continue to read Figure 4 , which is a schematic diagram of the backlight module structure and application of another implementation state of one embodiment of the present invention. In this implementation state, another example of a backlight module 1 is disclosed, in which the dot pattern P is also a butterfly pattern, and the aspect ratio of the directional dot 102, that is, the ratio of X to Y is 3.2≤X / Y≤4.2, and each light incident surface 1012 is provided with a light-emitting diode 11. Similarly, when any light-emitting diode 11 is driven, the directional dots 102 at different positions in the dot pattern P will produce different brightness performances according to the angle of the light they receive, thereby forming a first dot pattern P light-emitting state S21, as shown in FIG. Figure 4 (a), when the next LED 11 is lit, the directional dots 102 at different positions in the dot pattern P will produce different brightness performances according to the light angle formed by the LED 11 to the directional dots 102, thereby forming another dot lighting state S22, such as Figure 4 (b), after the LEDs 11 are continuously lit up according to the timing, the dot pattern P can be adjusted according to the different lighting states S21 to S26, such as Figure 4 (a) to (f) produce a dynamic luminous effect visually. Figure 4 In (a) to (f), the driven light emitting diode 11 is colored in, and the timing driving circuit 12 is omitted and explained together.

[0026] In summary, the backlight module of the present invention that can achieve a dynamic luminous effect utilizes the timing-driven illumination of light-emitting diodes to illuminate the directional dots at different viewing angles, and combines the structural characteristics of the directional dots themselves to achieve the goal of making the dot pattern formed by the arrangement of the directional dots have a dynamic luminous effect. More specifically, by designing the long-axis section and the short-axis section of the spindle-shaped directional dot structure at different angles, it is possible to provide light to the directional dots from different directions, and the directional dots will produce light with different brightness. When combined with the timing-controlled luminous action, the dot pattern can produce different luminous states in succession, thereby forming a dynamic pattern luminous effect. Therefore, the above-mentioned directional dot structural features, including the aspect ratio and the angle between it and the different axial sections, have design significance and cannot be easily thought of through arbitrary replacement or selection. Furthermore, considering the convenience such as assembly and control of the incident angle of the LED, the light incident side can be provided with a bending section to form light incident surfaces having different angles with the horizontal plane, so that the LED can be arranged against the light incident surface to form different incident angles relative to the light guide plate; or considering the variability of the light output performance, the LED can be provided with different light colors to enhance the dynamic luminous variability of the dot pattern; the present invention also proposes several structural examples, including making the aspect ratio of the directional dots meet 15≤X / Y≤17, the cross-section of the directional dots in the short axis direction is V-shaped, or making the aspect ratio of the directional dots meet 3.2≤X / Y≤4.2.

[0027]

Explanation of symbols

[0028] 1 Backlight module

[0029] 10 Light guide plate

[0030] 101 Light incident side

[0031] 1011 bending section

[0032] 1012 Light incident surface

[0033] 102 directional dots

[0034] 11. Light Emitting Diode

[0035] 12 Timing Control Circuit

[0036] P Dot Pattern

[0037] A Long axis direction

[0038] B short axis direction

[0039] θ1 is the angle between the side wall edge line of the cross section of the directivity point in the long axis direction and the vertical line

[0040] θ2 is the angle between the side wall edge line of the cross section of the directivity point in the short axis direction and the vertical line

[0041] X-directivity dot length

[0042] Width of Y directivity dots

[0043] S11~S16 lighting status

[0044] S21~S26 Lighting status

Claims

1. A backlight module capable of achieving a dynamic lighting effect, characterized in that: include: A light guide plate having at least one light incident side, and a plurality of directional dots are arranged on the upper surface or the lower surface of the light guide plate, wherein the directional dots are arranged to form a dot pattern; wherein each of the directional dots is a spindle-shaped concave structure extending along a long axis direction and a short axis direction, the length of each of the directional dots is X, the width is Y, and X / Y ≥ 3, the side wall edge line of the cross section of each of the directional dots in the long axis direction and the vertical line has an angle of 80±5 degrees, and the side wall edge line of the cross section of each of the directional dots in the short axis direction and the vertical line has an angle of 50±5 degrees; A plurality of light emitting diodes are respectively arranged corresponding to the light incident sides, and the light emitting diodes form different incident light angles relative to the light guide plate; and a timing control circuit, electrically connected to the light emitting diode to control the driving timing of the light emitting diode; When the light emitting diode is driven and lit by the timing control circuit, the directional dots generate different brightness according to incident light from different directions, thereby making the dot pattern form a dynamic lighting effect according to the driving timing of the light emitting diode.

2. The backlight module capable of achieving dynamic lighting effect as claimed in claim 1, characterized in that: in, The light incident side has multiple bending sections to form multiple light incident surfaces, and the light incident surfaces form different angles with the horizontal plane respectively. Each light emitting diode is arranged corresponding to each light incident surface, and different incident light angles are formed relative to the light guide plate according to the angle between each light incident surface and the horizontal plane.

3. The backlight module capable of achieving dynamic lighting effect as claimed in claim 1, characterized in that: in, The light emitting diodes have different luminous colors.

4. The backlight module capable of achieving dynamic lighting effect as claimed in claim 1, characterized in that: in, 15≤X / Y≤17.

5. The backlight module capable of achieving dynamic lighting effect as claimed in claim 4, characterized in that: in, The cross section of each of the directional grid points in the short axis direction is V-shaped.

6. The backlight module capable of achieving dynamic lighting effect as claimed in claim 1, characterized in that: in, 3.2≤X / Y≤4.2.

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