Illumination module and light projection device including the illumination module

Abstract

A light projection device includes a printed circuit board and a plurality of lighting modules. The lighting module includes a non-rectangular light-emitting diode component and a lens. The light-emitting diode component is disposed on the printed circuit board, and the lens defines a chamber and is arranged to cover the light-emitting diode component within the chamber.

Description

[0001] Cross - reference to related applications

[0002] This application claims priority to European Patent Application No. 21202334.5, filed on October 13, 2021, the entire content of which is incorporated herein by reference. Technical field

[0003] The present disclosure relates to a lighting module and a light projection device including the lighting module. Background art

[0004] Conventionally, in the field of display devices such as TV backlights, light - emitting diode (LED) lighting devices can be used and arranged in an array on the back of the TV device, that is, at a position opposite to the display screen of the TV device. Referring to Figure 1 , each LED lighting device generally includes a loader 11, an LED chip 12, and a lens 13. The loader 11 is a pentahedron with a triangular cross - section and has a top surface 14 and a bottom surface 15 that define a non - zero angle θ therebetween. The loader 11 is mounted on a printed circuit board (PCB) 10, and the bottom surface 15 is in contact with the printed circuit board 10. The LED chip 12 is mounted on the top surface 14 of the loader 11 such that a light - emitting surface (LES) 16 of the LED chip 12 also has the non - zero angle θ with respect to the printed circuit board 10. The lens 13 covers the LED chip 12. By controlling the LED lighting device, light can be projected onto the wall on the back of the TV device when the display screen is activated, which can be called the backlight effect. Summary of the invention

[0005] Therefore, one object of the present disclosure is to provide a lighting module with higher assembly efficiency and smaller overall size.

[0006] Thus, in some embodiments of the lighting module of the present disclosure, it includes a non - rectangular light - emitting diode component and a lens. The light - emitting diode component is disposed on a printed circuit board, and the lens defines a chamber and is arranged to cover the light - emitting diode component within the chamber.

[0007] Another object of the present disclosure is to provide a light projection device including the above - mentioned lighting module.

[0008] Thus, in some embodiments, the light projection device of the present disclosure includes a printed circuit board and a plurality of lighting modules, and the plurality of lighting modules are disposed on the printed circuit board.

[0009] The beneficial effects of the present disclosure are as follows: Through the orientation portion and the light emitting portion of the light emitting diode component, the assembly of the lighting module can be completed more efficiently. At the same time, the final size of the lighting module can be reduced, and the possibility of poor contact between the printed circuit board, the loader, and the light emitting diode component can be eliminated. In addition, by forming the lens into a specific shape, the lighting module and the light projection device can project light patterns that can meet various specification requirements for different applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a cross-sectional view of an existing lighting device;

[0011] Figure 2 is a cross-sectional view of an embodiment of the lighting module of the present disclosure;

[0012] Figure 3 is a side view of the lighting module of the embodiment;

[0013] Figure 4 is a perspective view of the lighting module of the embodiment;

[0014] Figure 5 is a perspective view of the embodiment viewed from another perspective direction;

[0015] Figure 6 is a side view of an embodiment of the light projection device of the present disclosure;

[0016] Figure 7 is a perspective view of the light projection device of the embodiment;

[0017] Figure 8 is a bottom view of the light projection device of the embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present disclosure will be described in detail below with reference to the accompanying drawings and embodiments.

[0019] Before the present disclosure is described in detail, it should be noted that in the following description, similar elements are denoted by the same reference numerals.

[0020] Refer to Figure 2 , which is a cross-sectional view of an embodiment of the lighting module 100 of the present disclosure. The lighting module 100 is mounted on a printed circuit board (PCB) 110 and includes a light emitting diode (LED) component 102 and a lens 104.

[0021] The light-emitting diode assembly 102 includes at least one red LED chip, at least one green LED chip, and at least one blue LED chip, and the light-emitting diode assembly 102 can be referred to as a set of red, green, and blue (RGB) LED chips. In other embodiments, the light-emitting diode assembly 102 may include additional LED chips or other types of LED chips (e.g., white LED chips).

[0022] The light-emitting diode assembly 102 is mounted on a mounting surface 111 of the printed circuit board 110 and is configured to have a non-rectangular shape.

[0023] Specifically, in different applications, the light-emitting diode assembly 102 is arranged such that a light-emitting surface (LES) 102c of the light-emitting diode assembly 102 is not parallel to the mounting surface 111 of the printed circuit board 110. That is, a first non-zero angle θ is defined between the light-emitting surface 102c and the printed circuit board 110.

[0024] In this embodiment, the light-emitting diode assembly 102 is configured to have an orientation portion 102a in contact with the printed circuit board 110 and a light-emitting portion 102b provided on the orientation portion 102a, such that the light-emitting surface 102c of the light-emitting portion 102b defines the first non-zero angle θ with the mounting surface 111 of the printed circuit board 110. Based on the application of the lighting module 100, the size of the light-emitting diode assembly 102, particularly the orientation portion 102a, can be designed to have a desired angle equal to / associated with the first non-zero angle θ.

[0025] Refer to Figure 3 , which is a side view of an embodiment of the lighting module 100 of the present disclosure.

[0026] As Figure 3 , 4 shown, the lens 104 can be made of a light-transmitting material (e.g., glass, epoxy resin, etc.) and defines a chamber 104e, and the lens 104 is arranged to cover the light-emitting diode assembly 102 within the chamber 104e.

[0027] As Figure 3 shown, the lens 104 is arranged to have a first portion 104a and a second portion 104b. The first portion 104a is in contact with the printed circuit board 110 and is arranged to surround the light-emitting diode assembly 102.

[0028] When viewed from the side, the first part 104a has a trapezoidal shape and is defined by an edge 104c such that the edge 104c defines a second non-zero angle ψ with the printed circuit board 110. The second part 104b is disposed on the edge 104c of the first part 104a to cover the light-emitting diode assembly 102. In other embodiments, the second part 104b may be one of a circular shape and an elliptical shape (i.e., when viewed from the top, the second part 104b has a circular or elliptical cross-section). Refer to Figure 4 , which is a perspective view of an embodiment of the lighting module 100 of the present disclosure. Refer to Figure 5 , which is a perspective view of an embodiment of the lighting module 100 of the present disclosure viewed from another perspective direction.

[0029] Refer to Figure 4 , in this embodiment, the light-emitting diode assembly 102 as shown in Figure 2 can be fabricated by arranging a plurality of LED chips 102d (e.g., red LED chips 102d, green LED chips 102d, and blue LED chips 102d) on a substrate 102e and covering the substrate 102e in a package, but not limited thereto.

[0030] In use, in order to accommodate various applications of the lighting module 100, the second part 104b may have different shapes. In this embodiment, the second part 104b has an inner surface as a light incident surface (i.e., the surface on which the light emitted by the light-emitting diode assembly 102 will first shine), and a convex outer surface as a light exit surface (i.e., the surface from which the light exits the lens 104). In this embodiment, the inner surface is a concave surface (as shown in Figure 4 and Figure 5 ), however, in other embodiments, the inner surface may also be a flat surface.

[0031] After the lens 104 is disposed to cover the light-emitting diode assembly 102, the first non-zero angle θ and the second non-zero angle ψ may be equal to or different from each other. In other embodiments, the second part 104b of the lens 104 defines a central axis 104d, and the light-emitting diode assembly 102 is disposed such that the central axis 104d passes through the center point of the light exit surface 102c (as shown in Figure 5 ).

[0032] In other embodiments, after the lens 104 is arranged to cover the light-emitting diode assembly 102, the chamber 104e of the lens 104 may be filled with filling particles (small particles floating in the chamber 104e). In other embodiments, the filling particles may be one of ZrO2 and SiO2, and the filling particles are arranged in the chamber 104e to enhance the color mixing effect of the lighting module 100.

[0033] It should be specifically noted that, in various applications, the above-mentioned multiple lighting modules 100 may be implemented together to provide the required lighting effect. For example, for the backlight effect of a television device (that is, when the display screen of the television device is turned on, light is projected onto the wall behind the television device).

[0034] Refer to Figure 6 , which is a side view of an embodiment of the light projection device 300 of the present disclosure. Refer to Figure 8 , which is a bottom view of an embodiment of the light projection device 300 of the present disclosure.

[0035] In the present embodiment, the light projection device 300 includes a printed circuit board 110, a plurality of non-rectangular light-emitting diode assemblies 102 arranged on the printed circuit board 110, and a plurality of lenses 104 arranged on the printed circuit board 110 to respectively cover the light-emitting diode assemblies 102.

[0036] It should be specifically noted that each of the light-emitting diode assemblies 102 and each of the lenses 104 may be configured in the manner described in the above embodiments. That is, each of the light-emitting diode assemblies 102 has an orientation portion 102a in contact with the printed circuit board 110, and a light-emitting portion 102b arranged on the orientation portion 102a, and a non-zero rotation angle (first non-zero angle θ) is defined between the light-emitting surface 102c of the light-emitting portion 102b and the printed circuit board 110.

[0037] Each of the lenses 104 has a first portion 104a and a second portion 104b. A first portion 104a is in contact with the printed circuit board 110 and is arranged to surround a corresponding one of the light-emitting diode assemblies 102. The first portion 104a is defined by an edge 104c, and the edge 104c defines the angular position with respect to the printed circuit board 110. The second portion 104b is arranged on the edge of the first portion 104a to cover the corresponding light-emitting diode assembly 102, and the second portion 104b may be one of a circular shape and an elliptical shape.

[0038] For each of the lenses 104, the second part 104b has an inner surface as the light incident surface and a convex outer surface as the light exiting surface, and the inner surface can be either a plane or a concave surface.

[0039] The chamber 104e of each lens 104 can be filled with filling particles (small particles floating in the chamber 104e). In other embodiments, the filling particles can be either ZrO2 or SiO2.

[0040] Although in this embodiment, four light-emitting diode components 102 and four lenses 104 are used, however, in other embodiments, different numbers of light-emitting diode components 102 and lenses 104 can be included in the light projection device 300.

[0041] Specifically, in this embodiment, the lens 104 can be an integrally formed element. Figure 7 is a perspective view of a substrate 106 according to an embodiment of the present disclosure. As Figure 7 shown, the lens 104 is formed on the substrate 106, and the substrate 106 is disposed on the printed circuit board 110. In this embodiment, the substrate 106 has a first part 106a and a second part 106b that are not coplanar, that is, the first part 106a and the second part 106b each have a support surface for the lens 104 to be formed thereon, and the support surfaces of the first part 106a and the second part 106b extend in different directions. In this embodiment, the substrate 106 includes a plurality of support legs 106d with different lengths, such that when the support legs 106d are disposed on the printed circuit board 110, the first part 106a and the second part 106b can face different directions.

[0042] Two of the four lenses 104 (labeled 1041, 1042) are disposed on the first part 106a of the substrate 106, while the other two of the four lenses 104 (labeled 1043, 1044) are disposed on the second part 106b of the substrate 106. Specifically, the relative positions of the four light-emitting diode components 102 on the printed circuit board 110 (and thus, the relative positions of the four lenses 104 on the substrate 106) can be arranged in different ways to meet the requirements of various applications and are not limited to those shown in the drawings.

[0043] In the present embodiment, the lenses 1041 and 1042 are formed to have two unique non-zero angles (i.e., two different angles) related to the first portion 106a of the substrate 106, and the lenses 1043 and 1044 are formed to have two non-zero angles (i.e., two different angles) related to the second portion 106b of the substrate 106. However, the angular positions between the lenses 104 and the substrate 106 are not limited thereto.

[0044] In use, as Figures 6 to 8 shown, a plurality of light projection devices 300 can be used for various applications, such as: on the back surface of a television device opposite to the display screen of the television device.

[0045] In summary, the embodiments of the present disclosure provide an illumination module and a light projection device including the illumination module. In the embodiment, the light-emitting diode assembly is formed to have an orientation portion and a light-emitting portion in contact with the printed circuit board. Since the orientation portion and the light-emitting portion are integrated, when the light-emitting diode assembly is mounted on the printed circuit board, the light-emitting surface will "rotate" to the angle of rotation of the printed circuit board, and such an effect can be achieved without first mounting the loader on the printed circuit board before mounting the light-emitting diode assembly on the loader. Therefore, the assembly of the illumination module can be completed with higher efficiency, while the final size of the illumination module can be reduced (which may be particularly advantageous in applications on television devices), and the possibility of poor contact between the printed circuit board, the loader and the light-emitting diode assembly can be eliminated.

[0046] In addition, by forming the lens to have a specific shape as described in the embodiment, the generated illumination module and the light projection device can project light patterns that can meet various specification requirements for different applications, so the object of the present disclosure can be truly achieved.

[0047] In the above description, for the purpose of explanation, many specific details have been set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that one or more other embodiments can be implemented without some of these specific details. It should also be understood that throughout the specification, the reference to "one embodiment", "an embodiment", the embodiment with ordinal indication, etc. means that a specific feature, structure or characteristic can be included in the implementation of the present disclosure. It should be further understood that in the specification, sometimes various features are combined in a single embodiment, diagram or its description to simplify the present disclosure and help understand various inventive aspects, and one or more features or, where appropriate, in the implementation of the present disclosure, the specific details from one embodiment can be implemented together with one or more features or specific details from another embodiment.

[0048] The above are only examples of the present disclosure, and should not be used to limit the scope of implementation of the present disclosure. All simple equivalent changes and modifications made according to the claims and the content of the specification of the present disclosure still fall within the scope covered by the present disclosure.

Claims

1. A light projection device, characterized in that, The light projection device includes: A printed circuit board; and A plurality of lighting modules disposed on the printed circuit board, the lighting module including: A non-rectangular light-emitting diode component; and A lens that defines a chamber and is disposed to cover the light-emitting diode component within the chamber; Wherein, the lenses of the plurality of lighting modules are integrally formed on a substrate, the substrate is disposed on the printed circuit board, and includes a first portion and a second portion that are not coplanar; and The lenses of at least two of the lighting modules are disposed on the first portion of the substrate, and the lenses of at least two of the lighting modules are disposed on the second portion of the substrate; Each of the lenses has: A first portion that contacts the substrate and is disposed to surround the corresponding light-emitting diode component, the first portion of the lens is defined by an edge that defines a non-zero angle with the substrate; and A second portion that is disposed at the edge of the first portion of the lens to cover the corresponding light-emitting diode component, the second portion of the lens is one of circular and elliptical; and Each of the lenses defines a unique non-zero angle with the substrate.

2. The light projection device according to claim 1, wherein: The light-emitting diode component includes at least one red light-emitting diode chip, at least one green light-emitting diode chip, and at least one blue light-emitting diode chip.

3. The light projection device according to claim 1 or 2, wherein: Each of the light-emitting diode components has an orientation portion and a light-emitting portion disposed on the orientation portion, such that the light-emitting surface of the light-emitting portion defines a non-zero rotation angle with the printed circuit board.

4. The light projection device according to claim 1, wherein: For each of the lenses, the second portion of the lens has an inner surface as a light incident surface and a convex outer surface as a light exit surface.

5. The light projection device according to claim 4, wherein: The inner surface is one of a flat surface and a concave surface.

6. The light projection device according to claim 1, wherein: The light projection device further includes filling particles disposed in the chamber of each of the lenses.

7. The light projection device according to claim 6, wherein: The filling particles are one of ZrO2 and SiO2.

8. The light projection device according to claim 3, wherein: The first portion of the lens contacts the printed circuit board, and the edge defines a second non-zero angle with the printed circuit board.

9. The light projection device according to claim 1, wherein: The first portion of the substrate and the second portion of the substrate each have a support surface for the lens to be integrally formed thereon, and the support surfaces of the first portion of the substrate and the second portion of the substrate extend in different directions.

10. The light projection device according to claim 1, wherein: The substrate includes a plurality of support legs of different lengths, the support legs are disposed on the printed circuit board, and the first portion and the second portion of the substrate can face different directions.

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