TWM609027U - Light source module and display device - Google Patents

Abstract

A light source module includes a substrate, a plurality of light emitting elements, an encapsulation layer, a plurality of reflective elements, a plurality of first light conversion layers and a light conversion film. The substrate has a bearing surface. The plurality of light emitting elements are disposed on the bearing surface of the substrate. The encapsulation layer covers the bearing surface and the plurality of light emitting elements. The encapsulation layer has a light exit surface facing away the bearing surface, and the light exit surface has a plurality of reflecting recesses, which are respectively disposed corresponding to the light emitting elements. The plurality of reflective elements are respectively disposed in the plurality of reflecting recesses. The plurality of first light conversion layers are disposed to the light exit surface of the encapsulation layer, and surround the reflecting recesses respectively. The light conversion film is disposed on the side of the encapsulation layer with the light exit surface.

Description

Light source module and display device

This creation relates to a light source module and a display device, in particular to a direct light source module and a display device with a direct light source module.

The liquid crystal display mainly includes components such as a backlight module, a display panel, and an outer frame. According to the direction of the light source, the backlight module can be divided into an edge-light type backlight module and a direct type backlight module. At present, medium and large-size liquid crystal displays that use light-emitting diodes (LEDs) as the light source of the backlight module are commercially available. In order to display high dynamic range (HDR) and high contrast requirements, more areas are used Direct backlight module with local dimming function. The characteristic of the light-emitting diode is that it has strong forward light. Therefore, the structural design of the direct type backlight module is to convert the light of the light-emitting diode into a uniform surface light source and then illuminate the display panel.

The light-emitting diodes currently used in the light source of the backlight module are mostly blue-emitting nitride light-emitting diodes. A wavelength conversion layer can be arranged between the light-emitting diode and the display panel to convert part of the blue light into other colors. The light, which is mixed with the blue light that has not been wavelength-converted, becomes the light color of the surface light source, such as white.

However, the dominant wavelength range of blue light emitting diodes is about 445 nanometers (nm) ~ 460 nanometers, which has strong energy. The wavelength conversion materials in the wavelength conversion layer, such as phosphors or quantum dots, are long-term If the direct radiation of blue light and the heat generated by wavelength conversion are not dissipated immediately, it is easy to cause deterioration, thereby reducing the conversion efficiency, thereby affecting the color rendering of the surface light source, and affecting the display quality of the display device.

This "prior art" paragraph is only used to help understand the content of this creation, so the content disclosed in the "prior art" may contain some conventional technologies that do not constitute the knowledge of those with ordinary knowledge in the technical field. In addition, the content disclosed in the "prior art" does not represent the content or the problem to be solved by one or more embodiments of this creation, nor does it mean that it has been used by a person with ordinary knowledge in the technical field before this creation application. Know or recognize.

This creation provides a light source module with high durability.

This creation provides a display device with stable display quality.

Other purposes and advantages of this creation can be further understood from the technical features disclosed in this creation.

In order to achieve one or part or all of the above objectives or other objectives, the light source module provided by an embodiment of the present creation includes a substrate, a plurality of light-emitting elements, an encapsulation layer, a plurality of reflective elements, a plurality of first light conversion layers, and Light conversion film. The substrate has a bearing surface. A plurality of light emitting elements are arranged on the carrying surface of the substrate. The encapsulation layer covers the bearing surface and the light-emitting elements. The encapsulation layer has a light-emitting surface away from the bearing surface, and the light-emitting surface has a plurality of reflection grooves, and the reflection grooves are respectively arranged opposite to the light-emitting elements. A plurality of reflecting elements are respectively arranged in the reflecting grooves. A plurality of first light conversion layers are arranged on the light emitting surface of the encapsulation layer, and respectively surround the reflection grooves. The light conversion film is arranged on the side of the encapsulation layer with the light-emitting surface.

In an embodiment of the present creation, the above-mentioned light-emitting surface includes a configuration area around each reflection groove to configure each first light conversion layer.

In an embodiment of the present invention, each of the above-mentioned first light conversion layers includes a glue layer and a plurality of light conversion particles arranged in the glue layer.

In an embodiment of the present creation, in the above-mentioned configuration area, the closer to the reflection groove, the higher the distribution density of these light conversion particles.

In an embodiment of this creation, the above-mentioned configuration area includes a first annular area surrounding the reflecting groove and a second annular area surrounding the first annular area. The distribution density of these light conversion particles in the first annular area Greater than the distribution density of these light conversion particles in the second annular region.

In an embodiment of the present creation, the above-mentioned reflecting grooves respectively have an opening located on the light-emitting surface and a bottom relative to the opening, and the area of the opening is larger than the area of the bottom.

In an embodiment of the present invention, each of the above-mentioned light-emitting elements includes a light-emitting surface facing the opening, and the area of the opening is larger than the area of the light-emitting surface.

In an embodiment of the present creation, the above-mentioned first light conversion layers are disposed on the light-emitting surface of the encapsulation layer.

In an embodiment of the present creation, the above-mentioned light-emitting surface further has a plurality of grooves, and the first light conversion layers are respectively disposed in the grooves.

In an embodiment of the present invention, the above-mentioned first light conversion layer includes a glue layer and a plurality of light conversion particles uniformly distributed in the glue layer.

In an embodiment of the present invention, the above-mentioned light conversion film includes two barrier layers and a second light conversion layer, and the second light conversion layer is disposed between the two barrier layers.

In an embodiment of the present creation, the above-mentioned light-emitting surface further has a plurality of light-emitting grooves, and the light-emitting grooves are arranged between two of the light-emitting elements.

In an embodiment of the present creation, the wavelength of the central waveband of the light converted by the first light conversion layer is greater than the wavelength of the central waveband of the light converted by the light conversion film.

In order to achieve one or part or all of the above-mentioned purposes or other purposes, the display device provided by an embodiment of the invention includes a display panel and the above-mentioned light source module. The display panel is arranged relative to the light source module and adjacent to the light emitting surface.

The reflective groove and the light-emitting element in this creative embodiment are arranged opposite to each other. The first light conversion layer surrounds the reflective groove and is arranged on the light-emitting surface. The reflective groove is equipped with a reflective element. Most of the light emitted by the light-emitting element will be reflected by the reflective groove first. The first light conversion layer is not directly irradiated by the light emitted by the light-emitting element, and the rate of deterioration can be delayed, and the direct heat from the light-emitting element can be transmitted through the encapsulation layer and reflected Dissipation of components makes the light source module of this creative embodiment highly durable, and the display device of this creative embodiment has a stable display quality due to the highly durable light source module.

In order to make the above and other objectives, features and advantages of this creation more obvious and easy to understand, the following will specifically cite preferred embodiments, in conjunction with the accompanying drawings, and describe them in detail as follows.

The aforementioned and other technical content, features and effects of this creation will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, for example: up, down, left, right, front or back, etc., are only directions for referring to the attached drawings. Therefore, the directional terms used are used to illustrate and not to limit this creation.

Fig. 1 is a schematic partial cross-sectional view of a light source module according to an embodiment of the present invention. FIG. 2 is a schematic top view of the encapsulation layer and the first light conversion layer according to an embodiment of the invention. 1 and FIG. 2, the light source module 100 of this embodiment includes a substrate 110, a plurality of light emitting elements 120, an encapsulation layer 130, a plurality of reflective elements 140, a plurality of first light conversion layers 150 and a light conversion film 160. The substrate 110 has a bearing surface 111. The multiple light-emitting elements 120 are disposed on the carrying surface 111 of the substrate 110. The encapsulation layer 130 covers the carrying surface 111 and the light-emitting elements 120. Specifically, the encapsulation layer 130 directly contacts the light-emitting elements 120 or the carrying surface 111, for example. The encapsulation layer 130 has a light-emitting surface 131 away from the carrying surface 111, and the light-emitting surface 131 has a plurality of reflective grooves 1311. The reflective grooves 1311 are, for example, respectively disposed opposite to the light-emitting elements 120, that is, the orthographic projection of each reflective groove 1311 on the carrying surface 111 corresponds to each light-emitting element 130, respectively. A plurality of reflecting elements 140 are respectively arranged in these reflecting grooves 1311. The plurality of first light conversion layers 150 are disposed on the light-emitting surface 131 of the encapsulation layer 130 and respectively surround the reflection grooves 1311. In this embodiment, the first light conversion layers 150 are, for example, disposed on the light exit surface 131 of the encapsulation layer 130, that is, the first light conversion layers 150 directly contact the light exit surface 131, but it is not limited thereto. The light conversion film 160 is disposed on the side of the encapsulation layer 130 having the light-emitting surface 131, and the plurality of first light conversion layers 150 are disposed between the encapsulation layer 130 and the light conversion film 160.

The light-emitting element 120 may be a light-emitting diode, but may also be other types of light-emitting elements. In addition, the light-emitting element 120 may also be a light-emitting chip that is cut directly from a wafer and is not packaged, such as a light-emitting diode chip. For example, the light-emitting diode chip is, for example, a grain-level nitride light-emitting diode chip that emits blue light at a dominant wavelength, but it is not limited to this. The number of light-emitting elements 120 in FIG. 1 is two as an example, but it is not limited thereto. In addition, the light-emitting elements 120 can be arranged in an array on the carrying surface 111. The light-emitting surface 121 of each light-emitting element 120, for example, faces the reflective groove 1311 and is away from the carrying surface 111, but is not limited to this. The plurality of first light conversion layers 150 and the plurality of reflection grooves 1311 also correspond to the light emitting elements 120 and are arranged in an array on the light emitting surface 131, as shown in FIG. 2. It should be noted that FIG. 2 is intended to present the arrangement of the multiple first light conversion layers 150 and the multiple reflection grooves 1311. The number of the multiple first light conversion layers 150 and the multiple reflection grooves 1311 is only for illustration. The creation is not particularly limited.

The light emitting surface 131 includes a configuration area C around each reflection groove 1311 to configure each first light conversion layer 150. The configuration area C, for example, surrounds the reflection groove 1311, and the first light conversion layer 150 does not need to completely fill the configuration area C. For example, there may be a gap G between the first light conversion layer 150 and the reflection groove 1311.

In this embodiment, the plurality of reflective grooves 1311 respectively have an opening 1311a located on the light exit surface 131, a bottom surface 1311b opposite to the opening 1311a, and a surrounding side surface 1311c surrounding and connected to the bottom surface 1311b. The surrounding side surface 1311c is inclined with respect to the light exit surface 131, for example, The area A1 of the opening 1311a is larger than the area A2 of the bottom surface 1311b. The light emitting surface 121 of each light emitting element 120 faces the opening 1311a of each reflective groove 1311, and the area A1 of the opening 1311a is also larger than the area A3 of the light emitting surface 121. As a result, most of the light L emitted by the light emitting element 120 from the light emitting surface 121 is more likely to be totally reflected by the bottom surface 1311b or the surrounding side surface 1311c after being directed to the reflecting groove 1311.

The shape of the reflection groove 1311 can be designed according to different requirements. In this embodiment, the shape of the reflection groove 1311 is, for example, a cup shape. In other embodiments, for example, the reflective groove 1311 may be a pyramidal shape formed by a single-slope surrounding side surface 1311c and a pointed bottom surface 1311b, or a single-slope surrounding side surface 1311c and a bottom 141c formed on a plane. The angular columnar shape. On the other hand, the surrounding side surface 1311c may also be composed of multiple inclined surfaces with different slopes or concave or convex surfaces with different curvatures, for example, a stepped shape. Therefore, the reflection groove 1311 can also be hemispherical, semi-ellipsoidal, parabolic, polygonal, etc., and the present creation is not limited to this. In addition, the reflective element 140 covers, for example, the bottom surface 1311 b of the reflective groove 1311 and does not fill the reflective groove 1311.

For example, the light-emitting surface 131 further has a plurality of light-emitting grooves 1312. The light-emitting grooves 1312 are respectively arranged between the two light-emitting elements 120 of the light-emitting elements 120. The light-emitting groove 1312 is, for example, a V-shaped groove, but it is not limited thereto. When a plurality of light-emitting elements 120 are arranged in an array on the carrying surface 111, the light-emitting grooves 1312 are distributed in a grid on the light-emitting surface 131, as shown in FIG. 2. After the light L is reflected by the reflection groove 1311, a part of the light L will be emitted to the first light conversion layer 150, and another part of the light L will be emitted from the light-emitting groove 1312. In this embodiment, the wavelength of the central waveband of the light converted by the first light conversion layer 150 is, for example, greater than the wavelength of the central waveband of the light converted by the light conversion film 160. For example, the light-emitting element 120 is suitable for emitting blue light, the first light conversion layer 150 is suitable for converting blue light into red light, and the light conversion film 160 is suitable for converting blue light into green light. Therefore, the light emitted from the light source module 100 is The white light mixed with the above color and light, but this creation does not limit the color configuration of the light conversion, and can be adjusted according to different design requirements.

The substrate 110 is, for example, a circuit board, and the carrying surface 111 can be a reflective surface and a plurality of conductive patterns (not shown) are arranged in a part of the area to electrically connect the plurality of light-emitting elements 120, and the carrying surface 111 can be provided with diffuse reflection characteristics. A white paint reflective sheet or paint, or a silver paint reflective sheet or paint with specular reflection characteristics, to configure the bearing surface 111 as a reflective surface.

The reflective groove 1311 of this embodiment is disposed opposite to the light emitting element 120. The first light conversion layer 150 surrounds the reflective groove 1311 and is disposed on the light emitting surface 131. The reflective groove 1311 is provided with the reflective element 140, and most of the light emitted by the light emitting element 120 L will first be reflected by the reflection groove 1311 or be totally reflected in the encapsulation layer 130 before it hits the first light conversion layer 150. The first light conversion layer 150 is not directly irradiated by the light L emitted by the light emitting element 120, which can delay the deterioration The speed and the direct heat of the light-emitting element 120 can be dissipated through the encapsulation layer 130 and the reflective element 140, so that the light source module 100 of this embodiment has a high degree of durability. In addition, since the first light conversion layer 150 is disposed on the light-emitting surface 131 of the encapsulation layer 130, the adjustment flexibility after the encapsulation of the light-emitting element 120 is relatively large, which can meet different needs. In addition, in the light conversion part, this embodiment uses the first light conversion layer 150 and the light conversion film 160 to perform light conversion separately, which is easier to produce secondary absorption conversion than the conventional technology using a single wavelength conversion layer. The light source module 100 of this embodiment can improve the conversion efficiency and light extraction efficiency.

Fig. 3 is a schematic cross-sectional view of a light conversion film according to an embodiment of the present invention. Please refer to FIG. 3, the light conversion film 160 of this embodiment includes, for example, two barrier layers 161 and a second light conversion layer 162. The second light conversion layer 162 is disposed between the two barrier layers 161. Specifically, the conversion material of the second light conversion layer 162 is, for example, quantum dots. Taking into account the characteristics of quantum dots that are prone to moisture, the second light conversion layer 162 is arranged between the two barrier layers 161, but not as limit. In other embodiments, when the conversion material of the second light conversion layer 162 is a phosphorescent material such as phosphor or phosphor, the barrier layer 161 may not be required.

4 is a schematic cross-sectional view of the first light conversion layer according to an embodiment of the present invention. FIG. 5 is a schematic top view of the first light conversion layer and the reflection groove according to another embodiment of the invention. Please refer to FIG. 4 first, the first light conversion layer 150 includes, for example, a glue layer 151 and a plurality of light conversion particles 152 disposed in the glue layer 151. In the light source module 100 of this embodiment, the light conversion particles 152 are, for example, evenly distributed in the glue layer 151, but it is not limited thereto. The material of the adhesive layer 151 includes, for example, silicone, resin, or other dielectrics, and is disposed on the supporting surface 111 in a coating manner, but is not limited thereto. The material of the light conversion particles 152 can be phosphorescent materials such as phosphors and phosphors, or nanomaterials such as quantum dots, but is not limited thereto.

Please refer to FIG. 5 again. In another embodiment, in the configuration area C, the closer to the reflective groove 1311, the higher the distribution density of the light conversion particles 152 in the first light conversion layer 150a, which corresponds to the light emitting element 120. The emitted light L is reflected by the reflection groove 1311 of the encapsulation layer 130 or totally reflected in the encapsulation layer 130 and irradiates the energy distribution of the first light conversion layer 150a. Specifically, the configuration area C includes, for example, a first ring-shaped area C1 surrounding the reflective groove 1311 and a second ring-shaped area C2 surrounding the first ring-shaped area C1, and the light conversion particles 152 in the first ring-shaped area C1 The distribution density is greater than the distribution density of the light conversion particles 152 in the second annular region C2, but is not limited to this. The configuration area C, for example, further includes one or more ring-shaped areas surrounding the second ring-shaped area 1112, such as a third ring-shaped area C3, and the distribution density of the light conversion particles 152 in the second ring-shaped area C2 is greater than that of the third ring-shaped area. The distribution density of the light conversion particles 152 in C3.

Fig. 6 is a schematic partial cross-sectional view of a light source module according to another embodiment of the present invention. Please refer to FIG. 6, the structure and advantages of the light source module 100a of this embodiment are similar to those of the above-mentioned light source module 100. The only difference is that the light emitting surface 131a of the encapsulation layer 130a further has, for example, a plurality of grooves 1313, and a plurality of first lights The conversion layer 150 is respectively disposed in these grooves 1313. By arranging the first light conversion layer 150 in the groove 1313, the first light conversion layer 150 can be fixed in place, so as to prevent the first light conversion layer 150 from spreading around when it is coated on the light emitting surface 131a. Light effect and conversion effect.

FIG. 7 is a schematic partial cross-sectional view of a display device according to an embodiment of the invention. Referring to FIG. 7, the display device 10 of this embodiment includes the above-mentioned light source module 100 and a display panel 200 disposed opposite to the light source module 100. The display panel 200 is adjacent to the light emitting surface 131, and the light conversion film 160 is disposed between the display panel 200 and the encapsulation layer 130. The display panel 200 can be a liquid crystal display panel or other non-self-luminous display panels, and the light source module 100 is used to provide light to the display panel 200. The light source module 100 included in the display device 10 of this embodiment is only an example, but not limited thereto. The display device 10 of this embodiment may also include the light source modules of all the above embodiments. Since the display device 10 of this embodiment has a highly durable light source module 100, it has stable display quality.

To sum up, the reflective groove and the light-emitting element of this creative embodiment are arranged opposite to each other. The first light conversion layer surrounds the reflective groove and is arranged on the light-emitting surface. The reflecting element is arranged in the reflective groove, and most of the light emitted by the light-emitting element will be first. After being reflected by the reflecting groove or totally reflected in the encapsulation layer, the first light conversion layer is not directly irradiated by the light emitted by the light-emitting element, which can delay the deterioration speed, and the direct heat of the light-emitting element can be Dissipating through the encapsulation layer and the reflective element, the light source module of this embodiment has a high degree of durability. The display device of this creative embodiment has stable display quality due to the highly durable light source module.

However, the above are only the preferred embodiments of this creation, and should not be used to limit the scope of implementation of this creation, that is, simple equivalent changes and modifications made according to the scope of patent application and new description of this creation, All are still within the scope of this creation patent. In addition, any embodiment of this creation or the scope of the patent application does not have to achieve all the purposes or advantages or features disclosed in the creation. In addition, the abstract part and title are only used to assist in searching for patent documents, not to limit the scope of rights of this creation. In addition, the terms "first" and "second" mentioned in this specification or the scope of the patent application are only used to name the element (element) or to distinguish different embodiments or ranges, and are not used to limit the number of elements. Upper or lower limit.

10: Display device 100, 100a: light source module 110: substrate 111: bearing surface 120: light-emitting element 121: light-emitting surface 130, 130a: encapsulation layer 131, 131a: Glossy surface 1311: reflection slot 1311a: opening 1311b: bottom surface 1311c: Surround the side 1312: light groove 1313: groove 140: reflective element 150, 150a: the first light conversion layer 151: Glue layer 152: Light Conversion Particles 160: light conversion film 161: Barrier Layer 162: second light conversion layer 200: display panel A1: Opening area A2: Bottom area A3: Light emitting surface area C: Configuration area C1: The first ring area C2: The second ring area C3: The third ring area G: interval L: light

Fig. 1 is a schematic partial cross-sectional view of a light source module according to an embodiment of the present invention. FIG. 2 is a schematic top view of the encapsulation layer and the first light conversion layer according to an embodiment of the invention. Fig. 3 is a schematic cross-sectional view of a light conversion film according to an embodiment of the present invention. 4 is a schematic cross-sectional view of the first light conversion layer according to an embodiment of the present invention. FIG. 5 is a schematic top view of the first light conversion layer and the reflection groove according to another embodiment of the invention. Fig. 6 is a schematic partial cross-sectional view of a light source module according to another embodiment of the present invention. FIG. 7 is a schematic partial cross-sectional view of a display device according to an embodiment of the invention.

100: light source module

110: substrate

111: bearing surface

120: light-emitting element

121: light-emitting surface

130: encapsulation layer

131: Glossy Surface

1311: reflection slot

1311a: opening

1311b: bottom surface

1311c: Surround the side

1312: light groove

140: reflective element

150: first light conversion layer

160: light conversion film

A1: Opening area

A2: Bottom area

A3: Light emitting surface area

C: Configuration area

G: interval

L: light

Claims (14)

A light source module includes: A substrate with a bearing surface; A plurality of light-emitting elements are arranged on the carrying surface of the substrate; An encapsulation layer covering the carrying surface and the light-emitting elements, the encapsulating layer has a light-emitting surface away from the supporting surface, and the light-emitting surface has a plurality of reflection grooves, and the reflection grooves are respectively arranged opposite to the light-emitting elements; A plurality of reflecting elements are respectively arranged in the reflecting grooves; A plurality of first light conversion layers are disposed on the light emitting surface of the encapsulation layer and respectively surround the reflection grooves; and A light conversion film is arranged on the side of the encapsulation layer with the light emitting surface. The light source module according to claim 1, wherein the light emitting surface includes a configuration area around each of the reflection grooves to configure each of the first light conversion layers. The light source module according to claim 2, wherein each of the first light conversion layers includes a glue layer and a plurality of light conversion particles arranged in the glue layer. The light source module according to claim 3, wherein in the configuration area, the closer to the reflection groove, the higher the distribution density of the light conversion particles. The light source module according to claim 4, wherein the configuration area includes a first annular area surrounding the reflecting groove and a second annular area surrounding the first annular area, and in the first annular area The distribution density of the light conversion particles is greater than the distribution density of the light conversion particles in the second annular region. The light source module according to claim 1, wherein the reflection grooves respectively have an opening on the light emitting surface and a bottom surface opposite to the opening, and the area of the opening is larger than the area of the bottom surface. The light source module according to claim 6, wherein each of the light-emitting elements includes a light-emitting surface facing the opening, and the area of the opening is larger than the area of the light-emitting surface. The light source module according to claim 1, wherein the first light conversion layers are disposed on the light emitting surface of the encapsulation layer. The light source module according to claim 1, wherein the light-emitting surface further has a plurality of grooves, and the first light conversion layers are respectively disposed in the grooves. The light source module according to claim 1, wherein each of the first light conversion layers includes a glue layer and a plurality of light conversion particles uniformly distributed in the glue layer. The light source module according to claim 1, wherein the light conversion film includes two barrier layers and a second light conversion layer, and the second light conversion layer is disposed between the two barrier layers. The light source module according to claim 1, wherein the light-emitting surface further has a plurality of light-emitting grooves, and the light-emitting grooves are disposed between two light-emitting elements of the light-emitting elements. The light source module according to claim 1, wherein the wavelength of the central waveband of the light converted by the first light conversion layer is greater than the wavelength of the central waveband of the light converted by the light conversion film. A display device includes: A light source module, including: A substrate with a bearing surface; A plurality of light-emitting elements are arranged on the carrying surface of the substrate; An encapsulation layer covering the carrying surface and the light-emitting elements, the encapsulating layer has a light-emitting surface away from the supporting surface, and the light-emitting surface has a plurality of reflection grooves, and the reflection grooves are respectively arranged opposite to the light-emitting elements; A plurality of reflecting elements are respectively arranged in the reflecting grooves; A plurality of first light conversion layers are disposed on the light emitting surface of the encapsulation layer and respectively surround the reflection grooves; and A light conversion film disposed on the side of the encapsulation layer with the light emitting surface; and A display panel is arranged opposite to the light source module and adjacent to the light emitting surface.

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