CN201706328U - A light source assembly and its lighting device and backlight module - Google Patents

Abstract

The utility model is a light source assembly, comprising: a base having at least two surfaces; at least two light emitting diode chips, respectively disposed on the base surface; at least two reflective components, respectively disposed on opposite sides of the base surface, and an angle is formed between the reflective components and the base surface, and the angle is between about 5° and about 85°. The light source assembly of the utility model can solve the problem of uneven brightness generated by a point light source, such as a light emitting diode (LED) light source, and reduce manufacturing costs.

Description

A light source assembly and its lighting device and backlight module

technical field

The utility model relates to a light source assembly, in particular to a light source assembly applied to a lighting device and a backlight module.

Background technique

Compared with traditional cold cathode fluorescent lamps (CCFL), point light sources, such as light-emitting diodes (LEDs), have the technical characteristics of using local control switches, so they can show better contrast between light and dark. In addition, the LED light source has a wider color saturation (color saturation), and the LED light source can be switched on and off more quickly, so that the application of the dynamic performance of the display can reduce the problem of afterimages, and moreover , the light-emitting diode light source can easily realize the trend of the times when the display is thin and light.

When the LED light source is used in the backlight module of the liquid crystal display, because there is a distance between the light source and the light source, and the light-emitting diode has a high degree of directivity, it will cause a dark area between the light source and the light source, the so-called The firefly effect (hot spot), especially when it is applied to the edge type backlight module (edge type backlight module), this phenomenon is more serious, and this phenomenon causes uneven brightness of the picture; distance, but this will inevitably increase the number of light sources, which will not only increase the manufacturing cost and the weight of the display, but also cause the temperature inside the backlight module to rise and cause overheating problems.

Another practice in the industry is to add a light guide device (such as a lens or a reflector) above the LED light source. As shown in Figure 1, the light source 10 emits light Ls and reflects the light Lr through the lens 11 to change the path of the light. , and then install a reflector on both sides of the light source for the second reflection to guide and diffuse the light so as to reduce the problem of uneven brightness; but such an additional light guide device needs to increase the manufacturing cost. In addition, multiple reflections This phenomenon will inevitably lead to more energy loss of the light source. Therefore, an LED lighting device that can simultaneously solve the uneven brightness and reduce the manufacturing cost is eagerly awaited by the industry.

Contents of the invention

The technical problem to be solved by the utility model is: in view of the shortcomings of the above prior art, a light source assembly and its lighting device and backlight module are proposed, which can solve the problems caused by point light sources, such as light-emitting diode (LED) light sources. The problem of uneven luminance is generated, and the manufacturing cost can be reduced, and it has a better degree of freedom in space.

The technical scheme that the utility model solves above technical problem is:

A light source assembly, comprising a base with at least two surfaces, at least two light-emitting diode chips and at least two reflective components; the light-emitting diode chips are respectively arranged on the surface of the base; the reflective components are respectively arranged on the opposite sides of the base surface , and there is an included angle between the reflection component and the surface of the base, and the included angle is between 5° and 85°.

An illuminating device using the light source assembly of the utility model includes a substrate and a plurality of light source assemblies arranged on the substrate.

A backlight module applying the lighting device of the utility model comprises a light guide plate, an illuminating device and a reflection film; the lighting device is arranged around the light guide plate; the reflection film is arranged directly under the light guide plate.

A backlight module applying the lighting device of the utility model comprises a diffusion plate, a lighting device and a reflection film; the lighting device is arranged under the diffusion plate; the reflection film is arranged directly under the lighting device.

In the light source assembly of the utility model, the reflection assembly is a plane or a V-shaped surface. The V-shaped surface has an included angle between 95° and 175°. The base may have two surfaces, including a first surface and a second surface, the first surface and the second surface are parallel to each other, and a light emitting diode chip is disposed on the first surface and the second surface respectively. The base may have three surfaces, including a first surface, a second surface and a third surface, and a light emitting diode chip is respectively arranged on the first surface, the second surface and the third surface. The base may also have four surfaces, including a first surface, a second surface, a third surface and a fourth surface, and a light emitting diode chip is respectively arranged on the first surface, the second surface, the third surface and the fourth surface.

In the backlight module of the present invention, the arrangement of the lighting devices includes linear arrangement, matrix arrangement, staggered arrangement, "mouth" arrangement or irregular arrangement.

The utility model has the advantages that: the utility model can solve the problem of uneven luminance produced by point light sources, such as LED light sources, and can reduce manufacturing costs. The position of the light source in the traditional point light source is generally "flat" and set in the one-dimensional space above the substrate. The position of the light source set by the light source module of the present invention is not limited to the one-dimensional space, and has better degrees of freedom in space.

Description of drawings

Fig. 1 is a diagram showing the state of use of a known point light source.

Fig. 2a is a cross-sectional view of an embodiment of the light source assembly of the present invention.

Fig. 2b is a perspective view of the light source assembly in Fig. 2a.

Fig. 3 is a cross-sectional view of another embodiment of the light source assembly of the present invention.

Fig. 4a is a schematic diagram of another embodiment of the light source assembly of the present invention.

Fig. 4b is a top view of the light source assembly in Fig. 4a.

Fig. 5a is a schematic diagram of another embodiment of the light source assembly of the present invention.

Fig. 5b is a top view of the light source assembly in Fig. 5a.

Fig. 6a is a cross-sectional view of the lighting device of the present invention.

Fig. 6b is a top view of the lighting device in Fig. 6a.

Fig. 7 is a schematic diagram of an embodiment of the lighting device of the present invention.

Fig. 8 is a schematic diagram of another embodiment of the lighting device of the present invention.

Fig. 9 is a schematic diagram of another embodiment of the lighting device of the present invention.

Fig. 10a is a cross-sectional view of an embodiment of the backlight module of the present invention.

Figure 10b is a top view of Figure 10a.

FIG. 11 is a schematic diagram of another embodiment of the backlight module of the present invention.

Detailed ways

Fig. 2a is a cross-sectional view of an embodiment of the light source assembly of the present invention. The light source assembly 21 includes a base 211 having two mutually parallel first surfaces 211a and second surfaces 211b, two LED chips 212 respectively disposed on the first surface 211a and the second surface 211b of the base 211, and two reflection components 213 . In addition to light emitting diode (LED) chips, organic electroluminescence devices (OLEDs) and polymer electroluminescence devices (PLEDs) may also be used. There is no special limitation on the surface of the above-mentioned reflection component, which can be a smooth surface or a rough surface. The rough surface can increase light scattering, thereby improving the light homogenization effect.

As shown in FIG. 2 a , the two reflective elements 213 are respectively disposed on opposite sides of the surface of the base 211 , and there is an included angle θ between the reflective element 213 and the surface of the base 211 ranging from about 5° to about 85°. The reflection component 213 is a plane.

Fig. 2b is a perspective view of the light source assembly of Fig. 2a. The base 211 of the light source assembly 21 has two first surfaces 211a and second surfaces 221b parallel to each other. A light emitting diode chip 212 is disposed on the first surface 211a and the second surface 211b respectively. After the light Ls is emitted from the LED chip 212, the light Lr is reflected by the reflection component 213 to change the direction of light emission.

Fig. 3 is a cross-sectional view of another embodiment of the light source assembly of the present invention. The light source component 31 includes a base 311 , two LED chips 312 and two reflective components 313 . As shown in FIG. 3 , there is an included angle θ ₁ between the reflection component 313 and the surface of the base 311 ranging from about 5° to about 85°. In this embodiment, in order to improve the utilization efficiency of the light source, the reflection component 313 is a V-shaped surface with a turning point p forming a turning angle θ ₂ , and the V-shaped surface has a clip between about 95° and about 175° angle θ ₂ . According to a preferred embodiment of the present utility model, the height hc from the center point of the LED chip 312 to the bottom surface of the reflective component 313 needs to be between the turning point p of the reflective component 313 to the height h1 of the bottom surface of the reflective component 313 to the apex of the reflective component 313 to the reflective component 313 between the height h2 of the bottom surface.

Fig. 4 is a schematic diagram and a top view of another embodiment of a light source assembly according to the present invention. The light source assembly 41 includes a base 411 , LED chips 412 and a reflection assembly 413 . As shown in FIG. 4 , the base 411 has four surfaces 411 a and two surfaces 411 b perpendicular to the surfaces 411 a. Each of the four surfaces 411a is provided with an LED chip 412 , and one of the surfaces 411b is optionally provided with the LED chip 412 .

Fig. 5a is a schematic diagram of another embodiment of the light source assembly of the present invention, and Fig. 5b is a top view of the light source assembly in Fig. 5a. The light source assembly 51 includes a base 511 , an LED chip 512 and a reflection assembly 513 . As shown in FIG. 5 , the base 511 is a tetrahedral structure, wherein three surfaces of the base 511 corresponding to the reflective component 513 are respectively provided with a light emitting diode chip 512 .

See now Figures 6a and 6b. According to the present invention, the lighting device 6 includes a substrate 62 and a plurality of light source assemblies 61 , wherein the plurality of light source assemblies 61 includes a plurality of bases 611 , a plurality of LED chips 612 and a plurality of reflective assemblies 613 . A plurality of light source assemblies 61 of the lighting device 6 are disposed on the substrate 62 . The operation of the present utility model is further described by Fig. 6a. Wherein, a plurality of light source assemblies 61 are arranged on the substrate 62 in straight lines with equal intervals. The light Ls emitted from the light source component 61 is reflected by the reflective component 613 and then changes to a light emitting direction Lr. Fig. 6b is a top view of the lighting device 6 in Fig. 6a.

The plurality of light source components included in the lighting device of the present invention is not limited to the above-mentioned light source component 61 , for example, any one of the light source component implementations in FIGS. 2 to 5 or a combination thereof can be selected. There is no special limitation on the arrangement of the lighting device according to the present invention when it is applied to the backlight module of the liquid crystal display, for example, it can be arranged in a straight line, in a matrix, in a staggered arrangement, in a "mouth" shape or irregularly.

FIG. 7 is a schematic diagram of an embodiment of an illuminating device applicable to a backlight module of the present invention. As shown in FIG. 7 , the lighting device 7 includes a plurality of light source assemblies 71 disposed on a substrate 72 , wherein the plurality of light source assemblies 71 include a plurality of bases 711 , a plurality of LED chips 712 and a plurality of reflective assemblies 713 . A plurality of light source components 71 are surrounded by reflective components 713, and the lighting devices 7 are arranged in a matrix.

FIG. 8 is a schematic diagram of an embodiment of the present invention applicable to a lighting device for a backlight module. The lighting device 8 includes a plurality of light source assemblies 81 disposed on a substrate 82 , wherein the plurality of light source assemblies 81 include a plurality of bases 811 , a plurality of LED chips 812 and a plurality of reflective assemblies 813 . Each light source assembly 81 is surrounded by a reflective assembly 813 and the lighting devices 8 are arranged in a matrix.

FIG. 9 is a schematic diagram of an embodiment of an illuminating device applicable to a backlight module of the present invention. The lighting device 9 of this embodiment includes a plurality of light source assemblies 91 disposed on a substrate 92 , wherein the plurality of light source assemblies 91 include a plurality of bases 911 , a plurality of LED chips 912 and a plurality of reflective elements 913 . A plurality of light source components 91 are surrounded by reflective components 913, and the lighting devices 9 are arranged in a "mouth" shape.

Fig. 10a and Fig. 10b are the situations where the lighting device according to the present invention is applied to the backlight module of the liquid crystal display, and Fig. 10b is a top view of the backlight module in Fig. 10a. In Fig. 10a, the backlight module 1A includes an illuminating device 1A1, a light guide plate 1A2, and a reflective film 1A3. One side or more than one side of the light panel 1A2. In this embodiment, the illuminating device 1A1 is located on one side of the light guide plate 1A2, and the reflective film 1A3 is disposed directly under the light guide plate 1A2. The lighting device 1A1 emits light Lr to the light guide plate 1A2. In this embodiment, the lighting devices 1A1 are arranged in a straight line.

FIG. 11 is a schematic diagram of another embodiment of a backlight module according to the present invention. The backlight module 2A includes a plurality of lighting devices 2A1 , a diffuser plate 2A2 and a reflective film 2A3 . In this embodiment, the illuminating device 2A1 is located directly under the diffusion plate 2A2, and the reflective film 2A3 is disposed directly under the illuminating device 2A1, wherein the illuminating device 2A1 emits light to the diffusing plate 2A2. In this embodiment, the lighting devices 2A1 are arranged in a matrix.

The backlight module of the present invention may further include one or more optical films with different functions, such as a diffusion film, a light concentrating film, a brightness enhancement film or an integrated film integrating the above functions.

The terminology used herein is only to describe the implementation, and is not intended to limit the protection scope of this creation. For example, the term "a" used in the specification, unless otherwise clearly explained in the text, the term "a" includes both singular and plural forms.

The utility model can also have other implementation modes, and all technical solutions formed by equivalent replacement or equivalent transformation all fall within the protection scope of the utility model.

Claims (10)

1. A light source assembly, characterized in that: it comprises a base with at least two surfaces, at least two light-emitting diode chips and at least two reflective components; the light-emitting diode chips are respectively arranged on the surfaces of the base; The reflective components are respectively arranged on opposite sides of the base surface, and there is an included angle between the reflective component and the base surface, and the included angle is between 5° and 85°. 2. The light source assembly according to claim 1, wherein the reflection assembly is a plane or a V-shaped surface. 3. The light source assembly according to claim 2, wherein the V-shaped surface has an included angle, and the included angle is between 95° and 175°. 4. The light source assembly according to claim 1, wherein the base has two surfaces, including a first surface and a second surface, the first surface and the second surface are parallel to each other, and the A light emitting diode chip is respectively arranged on the first surface and the second surface. 5. The light source assembly according to claim 1, wherein the base has three surfaces, including a first surface, a second surface and a third surface, and the first surface, the second surface and the third surface A light emitting diode chip is arranged on the three surfaces respectively. 6. The light source assembly according to claim 1, wherein the base has four surfaces, including a first surface, a second surface, a third surface and a fourth surface, and the first surface, the second surface A light emitting diode chip is respectively arranged on the second surface, the third surface and the fourth surface. 7. An illuminating device, characterized by comprising a substrate, and a plurality of light source assemblies according to any one of claims 1 to 6 arranged on the substrate. 8. A backlight module, characterized in that: comprising a light guide plate, an illuminating device as claimed in claim 7 and a reflective film; said illuminating device is arranged on the peripheral side of said light guide plate; said reflective film is arranged directly below the light guide plate. 9. A backlight module, characterized in that: comprising a diffuser plate, an illuminating device as claimed in claim 7 and a reflective film; said illuminating device is arranged under said diffuser plate; said reflective film is arranged on directly below the lighting fixture. 10. The backlight module according to claim 8 or 9, wherein the arrangement of the illuminating devices includes linear arrangement, matrix arrangement, staggered arrangement, "mouth" arrangement or irregular arrangement.

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