CN213149428U - Light source module and display device - Google Patents

Abstract

A light source module comprises a substrate, a plurality of light emitting elements, an encapsulation layer, a plurality of reflection elements, a plurality of first light conversion layers and a light conversion film. The substrate is provided with a bearing surface. The light emitting elements are arranged on the bearing surface of the substrate. The packaging layer covers the bearing surface and the light-emitting elements, the packaging layer is provided with a light-emitting surface far away from the bearing surface, the light-emitting surface is provided with a plurality of reflection grooves, and the reflection grooves are respectively arranged opposite to the light-emitting elements. The plurality of reflecting elements are respectively arranged in the reflecting grooves. The first light conversion layers are arranged on the light emitting surface of the packaging layer and respectively surround the reflection grooves. The light conversion film is disposed on a side of the package layer having the light emitting surface. The utility model discloses another provide a display device who has above-mentioned light source module. The utility model discloses a light source module has high durability, and display device has stable demonstration quality.

Description

Light source module and display device

Technical Field

The present invention relates to a light source module and a display device, and more particularly, to a direct-type light source module and a display device having the same.

Background

The liquid crystal display mainly comprises a backlight module, a display panel, an outer frame and other components. The backlight module can be divided into an edge-type backlight module and a direct-type backlight module according to different light source directions. Currently, a large-medium-sized lcd using Light-emitting diodes (LEDs) as a backlight source is widely used to display High Dynamic Range (HDR) and High contrast requirements, and a direct-type backlight module with local dimming (local dimming) function is often used. The direct type backlight module is structurally designed to convert light rays of the light emitting diodes into a uniform surface light source and then irradiate the uniform surface light source to the display panel.

Most of the leds currently used in the light source of the backlight module are blue-emitting nitride leds, and a wavelength conversion layer may be disposed between the leds and the display panel to convert part of the blue light into other colors of light, which are mixed with the blue light that is not wavelength-converted to become the light color of the surface light source, such as white.

However, the dominant wavelength range of the blue light emitting diode is about 445 nm (nm) to 460 nm, which has strong energy, and the wavelength conversion material in the wavelength conversion layer, such as phosphor or quantum dot, is directly irradiated by the blue light for a long time, and the heat energy generated by the wavelength conversion is easily deteriorated if not dissipated instantly, thereby reducing the conversion efficiency, further affecting the color rendering of the surface light source, and affecting the display quality of the display device.

The background section is provided to aid in understanding the present invention, and therefore the disclosure of the background section may include other art that does not constitute a part of the common general knowledge of the skilled person. Furthermore, the statements in the "background" section do not represent that section or the problems which may be solved by one or more embodiments of the present invention, nor are they intended to be known or appreciated by those skilled in the art prior to the present application.

SUMMERY OF THE UTILITY MODEL

The utility model provides a light source module has high durability.

The utility model provides a display device has stable demonstration quality.

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.

In order to achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a light source module including 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 is provided with a bearing surface. The light emitting elements are arranged on the bearing surface of the substrate. The packaging layer covers the bearing surface and the light-emitting elements, the packaging layer is provided with a light-emitting surface far away from the bearing surface, the light-emitting surface is provided with a plurality of reflection grooves, and the reflection grooves are respectively arranged opposite to the light-emitting elements. The plurality of reflecting elements are respectively arranged in the reflecting grooves. The first light conversion layers are arranged on the light emitting surface of the packaging layer and respectively surround the reflection grooves. The light conversion film is disposed on a side of the package layer having the light emitting surface.

In order to achieve one or a part of or all of the above or other objects, an embodiment of the invention provides a display device including a display panel and the light source module. The display panel is arranged opposite to the light source module and is adjacent to the light emergent surface.

The utility model discloses the reflecting trough sets up with light emitting component relatively, and first light conversion layer encircles the reflecting trough and disposes in the play plain noodles, disposes reflective element in the reflecting trough, and most light that light emitting component was emergent can just can the directive first light conversion layer after reflecting by the reflecting trough earlier or totally reflecting in the encapsulation layer, and under the light that first light conversion layer was not sent by light emitting component penetrated directly, can delay rotten speed, and the heat energy permeable encapsulation layer and the reflective element of light emitting component penetrating directly dissipate, make the utility model discloses a light source module has high durability, and the utility model discloses display device possesses stable display quality because of the light source module who has high durability.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

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 an encapsulation layer and a first light conversion layer according to an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of a light conversion film according to an embodiment of the present invention.

Fig. 4 is a schematic cross-sectional view of a first light conversion layer according to an embodiment of the present invention.

Fig. 5 is a schematic top view of a first light conversion layer and a reflective groove according to another embodiment of the present 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.

Detailed Description

The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are simply directions with reference to the drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

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 an encapsulation layer and a first light conversion layer according to an embodiment of the present invention. Referring to fig. 1 and fig. 2, a light source module 100 of the present embodiment includes a substrate 110, a plurality of light emitting elements 120, a packaging 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 carrying surface 111. The light emitting elements 120 are disposed on the carrying surface 111 of the substrate 110. The encapsulant layer 130 covers the carrier surface 111 and the light emitting elements 120, and specifically, the encapsulant layer 130 directly contacts the light emitting elements 120 or the carrier surface 111, for example. The package layer 130 has a light-emitting surface 131 far away from the supporting surface 111, and the light-emitting surface 131 has a plurality of reflective cavities 1311. The reflective cavities 1311 are, for example, disposed opposite to the light emitting elements 120, respectively, that is, an orthogonal projection of each reflective cavity 1311 on the supporting surface 111 corresponds to each light emitting element 130, respectively. The plurality of reflective elements 140 are disposed in the reflective cavities 1311, respectively. The first light conversion layers 150 are disposed on the light emitting surface 131 of the package layer 130 and respectively surround the reflective cavities 1311. In the embodiment, the first light conversion layers 150 are disposed on the light emitting surface 131 of the package layer 130, for example, that is, the first light conversion layers 150 directly contact the light emitting surface 131, but not limited thereto. The light conversion film 160 is disposed on a side of the package layer 130 having the light emitting surface 131, and the plurality of first light conversion layers 150 are disposed between the package layer 130 and the light conversion film 160.

The light emitting element 120 may be a light emitting diode, but may be another kind of light emitting element. In addition, the light emitting device 120 can also be an unpackaged light emitting chip, such as a light emitting diode chip, directly cut from a wafer. For example, the led chip is, but not limited to, a die-level nitride led chip emitting blue light at a dominant wavelength. The number of the light emitting elements 120 in fig. 1 is 2, but not limited thereto. In addition, the light emitting elements 120 may be arranged in an array on the supporting surface 111. The light emitting surface 121 of each light emitting element 120 faces the reflective groove 1311 and is away from the supporting surface 111, but is not limited thereto. The first light conversion layers 150 and the reflective cavities 1311 are also arranged in an array on the light emitting surface 131 corresponding to the light emitting elements 120, as shown in fig. 2. It should be noted that fig. 2 is intended to show the arrangement of the plurality of first light conversion layers 150 and the plurality of reflective troughs 1311, and the number of the plurality of first light conversion layers 150 and the plurality of reflective troughs 1311 is only an illustration, and the present invention is not particularly limited.

The light emitting surface 131 includes a configuration region C around each of the reflective cavities 1311 to configure each of the first light conversion layers 150. The arrangement region C is, for example, around the reflective trench 1311, and the first light conversion layer 150 may not completely fill the arrangement region C, for example, there may be a gap G between the first light conversion layer 150 and the reflective trench 1311.

In the present embodiment, the reflective grooves 1311 respectively have an opening 1311a located on the light emitting 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, for example, inclined with respect to the light emitting surface 131, and an area a1 of the opening 1311a is greater than an area a2 of the bottom surface 1311 b. 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. Therefore, most of the light L emitted from the light-emitting surface 121 by the light-emitting device 120 is more easily totally reflected by the bottom surface 1311b or the surrounding side surface 1311c after being emitted to the reflective groove 1311.

The shape of the reflective groove 1311 may be designed according to various requirements. In the present embodiment, the reflection groove 1311 is, for example, cup-shaped. In other embodiments, the reflective trough 1311 may be a pyramid formed by the single-slope surrounding side surface 1311c and the pointed bottom surface 1311b, or a corner post formed by the single-slope surrounding side surface 1311c and the bottom 141c being flat, for example. On the other hand, the surrounding side 1311c may also be composed of multiple slopes with different slopes or concave or convex surfaces with different curvatures, such as a step shape. Therefore, the reflective trough 1311 may also be hemispherical, semi-ellipsoidal, parabolic, polygonal, or the like, which the present invention is not limited to. The reflective element 140 covers, for example, the bottom surface 1311b of the reflective groove 1311 and does not fill the reflective groove 1311.

The light-emitting surface 131 further has a plurality of light-emitting grooves 1312, for example. The light emitting grooves 1312 are respectively disposed between two light emitting elements 120 of the light emitting elements 120. The light exit groove 1312 is, for example, a V-groove shape, but is not limited thereto. When the light emitting elements 120 are arranged in an array on the supporting surface 111, the light emitting grooves 1312 are, for example, in a grid shape on the light emitting surface 131, as shown in fig. 2. After the light L is reflected by the reflective groove 1311, a portion of the light L is emitted to the first light conversion layer 150, and another portion of the light L is emitted from the light-emitting groove 1312. In this embodiment, the wavelength of the central wavelength band of the light converted by the first light conversion layer 150 is, for example, greater than the wavelength of the central wavelength band 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 the blue light into red light, and the light conversion film 160 is suitable for converting the blue light into green light, so the light emitted from the light source module 100 is the white light mixed by the above-mentioned colored lights, but the present invention 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, the carrying surface 111 can be a reflective surface and is provided with a plurality of conductive patterns (not shown) in a partial region to electrically connect the plurality of light emitting elements 120, and a white paint reflective sheet or paint with diffuse reflection characteristics or a silver paint reflective sheet or paint with mirror reflection characteristics can be provided on the carrying surface 111 to configure the carrying surface 111 as a reflective surface.

The reflective groove 1311 of the present embodiment is disposed opposite to the light emitting element 120, the first light conversion layer 150 is disposed on the light emitting surface 131 around the reflective groove 1311, the reflective element 140 is disposed in the reflective groove 1311, most of the light L emitted from the light emitting element 120 is reflected by the reflective groove 1311 or totally reflected in the encapsulant 130 before being emitted to the first light conversion layer 150, the first light conversion layer 150 is not directly irradiated by the light L emitted from the light emitting element 120, the deterioration speed can be delayed, and the heat energy directly emitted from the light emitting element 120 can be dissipated through the encapsulant 130 and the reflective element 140, so that the light source module 100 of the present embodiment has high durability. In addition, since the first light conversion layer 150 is disposed on the light emitting surface 131 of the package layer 130, the flexibility of adjustment after the light emitting device 120 is packaged is large, and the adjustment can be adapted to different requirements. In addition, in the light conversion portion, the first light conversion layer 150 and the light conversion film 160 are used for performing light conversion respectively, and compared with the problem that secondary absorption conversion is easily generated by using a single wavelength conversion layer in the prior art, the light source module 100 of the embodiment can improve the conversion efficiency and the light extraction efficiency.

Fig. 3 is a schematic cross-sectional view of a light conversion film according to an embodiment of the present invention. Referring to fig. 3, the light conversion film 160 of the present embodiment includes two barrier layers 161 and a second light conversion layer 162, for example. 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, and the second light conversion layer 162 is disposed between the two barrier layers 161 in consideration of the characteristic that the quantum dots are easily affected by moisture, but is not limited thereto. In other embodiments, when the conversion material of the second light conversion layer 162 is a phosphor material such as phosphor, or the like, the barrier layer 161 may not be required to be disposed.

Fig. 4 is a schematic cross-sectional view of a first light conversion layer according to an embodiment of the present invention. Fig. 5 is a schematic top view of a first light conversion layer and a reflective groove according to another embodiment of the present invention. Referring to fig. 4, the first light conversion layer 150 includes an adhesive layer 151 and a plurality of light conversion particles 152 disposed in the adhesive layer 151. In the light source module 100 of the present embodiment, the light conversion particles 152 are, for example, uniformly distributed in the adhesive layer 151, but not limited thereto. The material of the glue layer 151 includes, for example, a silicon gel, a resin, or other dielectric substance, and is disposed on the supporting surface 111 by coating, for example, but not limited thereto. The material of the light conversion particles 152 may be a phosphorescent material such as a phosphor, or a nano material such as a quantum dot, but is not limited thereto.

Referring to fig. 5 again, in another embodiment, the closer to the reflective cavity 1311, the higher the distribution density of the light conversion particles 152 in the first light conversion layer 150a is in the configuration area C, so as to correspond to the energy distribution of the light L emitted by the light emitting element 120 and reflected by the reflective cavity 1311 of the encapsulation layer 130 or irradiated on the first light conversion layer 150a after being totally reflected in the encapsulation layer 130. Specifically, the configuration region C includes, for example, a first annular region C1 surrounding the reflective groove 1311 and a second annular region C2 surrounding the first annular region C1, and the distribution density of the light conversion particles 152 in the first annular region C1 is greater than the distribution density of the light conversion particles 152 in the second annular region C2, but is not limited thereto. The configuration region C further includes, for example, one or more annular regions surrounding the second annular region 1112, such as a third annular region C3, and the distribution density of the light conversion particles 152 in the second annular region C2 is greater than the distribution density of the light conversion particles 152 in the third annular region C3.

Fig. 6 is a schematic partial cross-sectional view of a light source module according to another embodiment of the present invention. Referring to fig. 6, the light source module 100a of the present embodiment has similar structure and advantages to the light source module 100 described above, but the difference is that the light emitting surface 131a of the packaging layer 130a further has a plurality of grooves 1313, for example, and the plurality of first light conversion layers 150 are respectively disposed in the grooves 1313. By disposing the first light conversion layer 150 in the recess 1313, the first light conversion layer 150 can be fixed in place, and the first light conversion layer 150 is prevented from diffusing around to affect the light emitting effect and the conversion effect when being coated on the light emitting surface 131 a.

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 the present embodiment includes the 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 may be a liquid crystal display panel or other non-self-luminous display panel, and the light source module 100 is used for providing light to the display panel 200. The light source module 100 included in the display device 10 of the present embodiment is only for illustration and is not limited thereto. The display device 10 of the present embodiment may also include the light source modules of all the embodiments. The display device 10 of the present embodiment has stable display quality because it has the light source module 100 with high durability.

To sum up, the utility model discloses the reflection tank sets up with light emitting component relatively, first light conversion layer encircles the reflection tank and disposes in the play plain noodles, dispose reflection component in the reflection tank, most light that light emitting component exited can just can directive first light conversion layer after reflection by the reflection tank reflection or total internal reflection in the encapsulation layer earlier, first light conversion layer is not penetrated directly by the light that light emitting component sent down, can delay rotten speed, and the heat energy permeable packaging layer and the reflection component of light emitting component direct incidence dissipate, make the light source module of this embodiment have high durability. The utility model discloses display device possesses stable demonstration quality because of having the light source module of high durability.

However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the contents of the present invention are still included in the scope of the present invention. Moreover, it is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. In addition, the abstract and the utility model name are only used to assist the searching of the patent documents, and are not used to limit the scope of the invention. Furthermore, the terms "first," "second," and the like in the description and in the claims are used for naming elements (elements) or distinguishing between different embodiments or ranges, and are not intended to limit the upper or lower limit on the number of elements.

Description of reference numerals:

10 display device

100. 100a light source module

110 base plate

111 bearing surface

120 light emitting element

121 light emitting surface

130. 130a encapsulation layer

131. 131a light emitting surface

1311 reflective trough

1311a opening

1311b bottom surface

1311c surrounding the lateral surface

1312 light emergent groove

1313 grooves

140 reflective element

150. 150a 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 open area

A2 area of bottom surface

A3 area of light emitting surface

C, configuration area

C1 first annular region

C2 second annular region

C3 third annular region

G is interval

L is light.

Claims (14)

1. A light source module, comprising 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, wherein:

the substrate is provided with a bearing surface;

the light-emitting elements are arranged on the bearing surface of the substrate;

the packaging layer covers the bearing surface and the plurality of light-emitting elements, the packaging layer is provided with a light-emitting surface far away from the bearing surface, the light-emitting surface is provided with a plurality of reflection grooves, and the reflection grooves are respectively arranged opposite to the plurality of light-emitting elements;

the plurality of reflecting elements are respectively arranged in the plurality of reflecting grooves;

the first light conversion layers are arranged on the light emitting surface of the packaging layer and respectively surround the reflection grooves; and

the light conversion film is disposed on a side of the encapsulation layer having the light emitting surface.

2. The light source module of claim 1, wherein the light emitting surface comprises a configuration region around each of the plurality of reflective cavities for configuring each of the plurality of first light conversion layers.

3. The light source module of claim 2, wherein each of the plurality of first light conversion layers comprises a glue layer and a plurality of light conversion particles disposed in the glue layer.

4. The light source module of claim 3, wherein the plurality of light conversion particles have a higher distribution density in the arrangement region closer to the reflection groove.

5. The light source module of claim 4, wherein the configuration region comprises a first annular region surrounding the reflective trench and a second annular region surrounding the first annular region, and a distribution density of the plurality of light conversion particles in the first annular region is greater than a distribution density of the plurality of light conversion particles in the second annular region.

6. The light source module of claim 1, wherein the plurality of reflective troughs 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 that of the bottom surface.

7. The light source module of claim 6, wherein each of the plurality of light emitting elements includes a light emitting face facing the opening, the opening having an area larger than an area of the light emitting face.

8. The light source module of claim 1, wherein the first light conversion layers are disposed on the light emitting surface of the encapsulation layer.

9. The light source module of 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.

10. The light source module of claim 1, wherein each of the plurality of first light conversion layers comprises a glue layer and a plurality of light conversion particles uniformly distributed in the glue layer.

11. The light source module of claim 1, wherein the light conversion film comprises two barrier layers and a second light conversion layer disposed between the two barrier layers.

12. The light source module of claim 1, wherein the light emitting surface further has a plurality of light emitting grooves, and the plurality of light emitting grooves are disposed between two of the plurality of light emitting elements.

13. The light source module of claim 1, wherein the wavelength of the central band of light converted by the first light conversion layer is greater than the wavelength of the central band of light converted by the light conversion film.

14. A display device, comprising a light source module and a display panel, wherein:

the light source module comprises a substrate, a plurality of light emitting elements, an encapsulation layer, a plurality of reflection elements, a plurality of first light conversion layers and a light conversion film, wherein:

the substrate is provided with a bearing surface;

the light-emitting elements are arranged on the bearing surface of the substrate;

the packaging layer covers the bearing surface and the plurality of light-emitting elements, the packaging layer is provided with a light-emitting surface far away from the bearing surface, the light-emitting surface is provided with a plurality of reflection grooves, and the reflection grooves are respectively arranged opposite to the plurality of light-emitting elements;

the plurality of reflecting elements are respectively arranged in the plurality of reflecting grooves;

the first light conversion layers are arranged on the light emitting surface of the packaging layer and respectively surround the reflection grooves; and

the light conversion film is arranged on one side of the packaging layer with the light emergent surface; and

the display panel is arranged opposite to the light source module and is adjacent to the light emergent surface.

Images