JP7445530B2 - Light source module and display device - Google Patents

Description

The present invention relates to a photoelectric module and a photoelectric device, and particularly to a light source module and a display device.

A light source module in a display device has a plurality of product forms, one of which employs a combination of a light emitting element and a color conversion layer to provide an illumination luminous flux. The light flux generated by the color conversion layer diverges, and in the process of propagating a part of the light flux to the outside of the light source module, there is a possibility that some of the light flux may return to the inside of the light source module due to reflection by the interface. In addition, the light loss increases with the increase of the optical path, so the conventional display device that provides illumination luminous flux by adopting the combination of a light emitting element and a color conversion layer has a low light recovery rate and a low light output efficiency. There are problems such as:

Please note that this "Background Art" section is only for helping people understand the content of the present invention, and therefore the content disclosed in this "Background Art" section may not be known to those skilled in the art. May involve technology. Therefore, the content disclosed in this "Background Art" section is based on the fact that the content or the problem to be solved by one or more embodiments of the present invention was already well known to a person skilled in the art before the filing of the present invention. does not mean it has been.

One object of the present invention is to provide a light source module that can improve light recovery rate and light output efficiency.

Another object of the present invention is to provide a display device with good display 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 some or all of the above objects or other objects, according to an embodiment of the present invention, a light source module is provided, which comprises a light source, a color conversion layer and a two-way color separation layer. including. A light source provides a first beam of light. The color conversion layer is installed in the propagation path of the first light beam and is used to convert the first light beam into a second light beam. The two-way color separation layer is installed on the light incident surface of the color conversion layer and receives the first light flux from the light source earlier than the color conversion layer, and the two-way color separation layer allows the first light flux to pass through and receives the first light flux from the light source earlier than the color conversion layer. Reflects two beams of light.

To achieve one, some, or all of the above-mentioned objects or other objects, according to an embodiment of the present invention, a display device is provided, which includes a display panel and the above-mentioned light source module. The light source module is installed to overlap the display panel.

According to the above, embodiments of the present invention have at least one of the following advantages or effects. In the light source module according to the embodiment of the present invention, by reflecting the second light flux (converted light flux) propagating toward the inside of the light source module using the two-way color separation layer, more of the second light flux is transmitted to the light source module. It is possible to output the data to the outside of the system. Therefore, the light source module according to the embodiment of the present invention can improve the light recovery rate and the light output efficiency, and since the display device according to the embodiment of the present invention employs the above-mentioned light source module, it can achieve good display quality. has.

In order to make the above-mentioned features and advantages of the present invention clearer, a detailed description will be given below by way of examples and with reference to the accompanying drawings.

FIG. 1 is a sectional view of a display device according to a first embodiment of the present invention. 2 is a bottom view of the color conversion layer in FIG. 1. FIG. FIG. 2 is a bottom view of the two-way color separation layer in FIG. 1; FIG. 3 is a bottom view of another example of a two-way color separation layer. 2 is a cross-sectional view of an optical film piece that can be used in the display device shown in FIG. 1. FIG. FIG. 3 is a sectional view of a display device according to a second embodiment of the present invention. 6 is a bottom view of the light source, color conversion layer, and two-way color separation layer in FIG. 5. FIG.

The above-mentioned and other technical contents, features, functions and effects of the present invention will become clearer from the detailed description of the preferred embodiments as follows, based on the accompanying drawings. It should be noted that terms regarding directions mentioned in the following embodiments, such as top, bottom, left, right, front, back, etc., refer only to the directions in the attached drawings. Accordingly, the directional terminology used is for the purpose of describing the invention only and is not intended to limit the invention.

FIG. 1 is a cross-sectional view of a display device 1 in a first embodiment of the present invention. As shown in FIG. 1, display device 1 includes a display panel 10 and a light source module 12. Display panel 10 is used to provide a video screen. By way of example, display panel 10 may be a liquid crystal display panel or other non-self-luminous display panel.

The light source module 12 is installed to overlap the display panel 10 and is used to provide an illumination luminous flux I. For example, the light source module 12 may be installed below the display panel 10 and serve as a backlight module of the display device 1.

The light source module 12 may be a direct type light source module or an edge type light source module. Although FIG. 1 shows one embodiment of the direct light source module, the embodiment of the direct light source module is not limited to this. Further, the light source module according to the present invention may be an edge type light source module.

The light source module 12 includes a light source 120, a color conversion layer 121, and a bidirectional color separation layer 122. Light source 120 is used to provide a first beam (luminous beam B1). By way of example, light source 120 may include one or more light emitting elements 1200. The light emitting element 1200 may be a light emitting diode (LED), but is not limited thereto.

The color conversion layer 121 is placed on the propagation path of the light beam B1. In the direct type light source module, the color conversion layer 121 is installed above the light source 120, and the light entrance surface S1 of the color conversion layer 121 is between the light source 120 and the light exit surface S2 of the color conversion layer 121. The light incident surface S1 is a surface on which the color conversion layer 121 receives the luminous flux B1 from the light source 120. In other words, the light beam B1 enters the color conversion layer 121 via the light entrance surface S1. The light exit surface S2 is a surface facing the light entrance surface S1, and the light exit surface S2 is located between the light entrance surface S1 and the display panel 10.

The color conversion layer 121 is used to convert the luminous flux B1 provided by the light source 120 into a second luminous flux (luminous flux B2). Specifically, a part of the light flux B1 propagating to the color conversion layer 121 is converted into a light flux B2 by the color conversion layer 121, and another part of the light flux B1 propagating to the color conversion layer 121 passes through the color conversion layer 121. In other words, the luminous flux becomes B1'. The illumination light flux I includes at least a light flux B2 converted by the color conversion layer 121 and a light flux B1' that has passed through the color conversion layer 121.

For example, the color conversion layer 121 may include fluorescent powder, quantum dots, or a combination of the two materials. Since materials such as fluorescent powder and quantum dots can absorb short wavelength light beams and emit long wavelength light beams, the wavelength of light beam B2 is longer than the wavelength of light beam B1.

In one embodiment, the light emitting device 1200 may be a blue light emitting diode, and the color conversion layer 121 may include a yellow color conversion material. Correspondingly, the luminous flux B1 and the luminous flux B1' may be blue luminous fluxes, and the luminous flux B2 may include a yellow luminous flux. The illumination light flux I is a white light flux formed by mixing a blue light flux and a yellow light flux. In another embodiment, the color conversion layer 121 may include a red color conversion material and a green color conversion material, and the luminous flux B2 may include a red luminous flux and a green luminous flux. In this way, the illumination luminous flux I is a white luminous flux formed by a mixture of a red luminous flux, a green luminous flux and a blue luminous flux. Note that the types of colors of the light emitting element 1200 and the color conversion layer (or the colors of the luminous flux B1 and the luminous flux B2) are not limited to those described above.

The two-way color separation layer 122 is installed on the light incident surface S1 of the color conversion layer 121, so that the two-way color separation layer 122 can receive the luminous flux B1 from the light source 120 earlier than the color conversion layer 121. . Further, the two-way color separation layer 122 may be installed on the light entrance surface S1 of the color conversion layer 121, and the two-way color separation layer 122 may be installed directly on the light entrance surface S1. 122 may be indirectly installed on the light incident surface S1. For example, the method for forming the bidirectional color separation layer 122 and the color conversion layer 121 is to sequentially form the bidirectional color separation layer 121 and the bidirectional color conversion layer 121 on the surface of a thin film or substrate (hereinafter referred to as "thin film/substrate"). forming a two-way color separation layer 122 (or a color conversion layer 121) in a thin film/substrate having a color conversion layer 121 (or a two-way color separation layer 122); The method may include bonding a thin film/substrate having 121 and a thin film/substrate having a two-way color separation layer 122.

The two-way color separation layer 122 allows the light flux B1 to pass therethrough, thereby allowing the color conversion layer 121 to receive the light flux B1. In addition, the two-way color separation layer 122 is further used to reflect the luminous flux B2. For example, the two-way color separation layer 122 installed on the light incident surface S1 of the color conversion layer 121 propagates in the direction away from the display panel 10 due to reflection from other optical elements or reflection from an interface. By reflecting the luminous flux B2 (for example, luminous fluxes B2A and B2B), the luminous fluxes B2A and B2B that originally propagated in the direction leaving the display panel 10 are now propagated to the display panel 10, that is, the luminous flux B2A' and the luminous flux B2B 'become. In this way, more luminous fluxes B2 (for example, luminous fluxes B2, luminous fluxes B2A', and luminous fluxes B2B') can be output to the outside of the light source module 12, so that the light collection rate and light output efficiency can be improved. .

In this embodiment, the light source module 12 may further include other elements and/or film layers according to different needs. For example, the light source module 12 may further include a diffusion sheet 123, a reflective sheet 124, a brightening film 125, and a double brightening film 126.

The diffusion sheet 123 is installed on the propagation path of the luminous flux B1 and is used to make the luminous flux B1 uniform. For example, the diffusion sheet 123 may be installed below the two-way color separation layer 122, and the two-way color separation layer 122 may be located between the color conversion layer 121 and the diffusion sheet 123. .

The reflective sheet 124 is installed below the two-way color separation layer 122, and the two-way color separation layer 122 is located between the color conversion layer 121 and the reflective sheet 124. In a configuration in which a diffusion sheet 123 is installed, the diffusion sheet 123 may be located between the two-way color separation layer 122 and the reflection sheet 124. The light beam B1 from the light source 120 may propagate in a direction away from the display panel 10 due to reflection by the interface. The reflective sheet 124 can propagate the light flux (not shown) to the display panel 10 by reflecting the light flux (not shown) propagating in a direction away from the display panel 10. In this embodiment, the light source 120 is installed on a reflective sheet 124, and the reflective sheet 124 may be a circuit board on which an external reflective layer is formed, but is not limited thereto.

Color conversion layer 121 is located between reflective sheet 124 and brightening film 125. Brightening film 125 is located between color conversion layer 121 and double brightening film 126. The brightening film 125 and the double brightening film 126 are used to achieve a brightening effect by concentrating the luminous flux. For example, the brightening film 125 may include a first brightening film 1250 and a second brightening film 1252, in which the first brightening film 1250 is between the second brightening film 1252 and the color conversion layer 121. Located in The first brightening film 1250 may include a plurality of triangular prisms T1. These triangular prisms T1 each extend along the first direction D1 and are arranged along the second direction D2. For example, the first direction D1 and the second direction D2 are perpendicular to each other. The second brightening film 1252 may include a plurality of triangular prisms T2. These triangular prisms T2 each extend along the second direction D2 and are arranged along the first direction D1.

Regarding the pattern design of the two-way color separation layer 122 and the arrangement on the light entrance surface S1 of the color conversion layer 121 of the two-way color separation layer 122 in the present invention, it is necessary to correspond to the entire light entrance surface S1 of the color conversion layer 121. In addition to being able to provide a bidirectional color separation layer 122, it can also be varied according to different design needs. For example, in traditional display devices, when it comes to light source modules, color cast problems may occur in local areas of the light source module due to assembly, design, edge light leakage, light interference, etc. There is sex. Generally speaking, color cast problems mainly occur within 30 millimeters (mm) from the edge of the light source module. In order to meet the needs of narrow frames, the frames of display devices are becoming increasingly narrower, and the problem of edge color cast is that the edge area is not effectively shielded by the frame or the frame effectively blocks unexpected light flux. They gradually appear because they are unable to do so. In the display device 1, due to the pattern design of the two-way color separation layer 122 and the arrangement of the color conversion layer 121 of the two-way color separation layer 122 on the light incident surface S1, the center of the light source module 12 of the light flux B1 and/or the light flux B2 is The output ratio in the region and/or the surrounding region can be controlled, thereby improving the color cast problem associated with conventional display devices.

FIG. 2A is a bottom view of the color conversion layer in FIG. 1. FIG. 2B is a bottom view of the two-way color separation layer in FIG. 1. Note that the pattern design of the two-way color separation layer 122 and the arrangement of the color conversion layer 121 of the two-way color separation layer 122 on the light incident surface S1 are not limited to those shown in FIGS. 2A and 2B.

See Figures 2A and 2B. The color conversion layer 121 may have a central region R1 and a peripheral region R2 located on the outer periphery of the central region R1, and the two-way color separation layer 122 has a central region color separation layer 1220 and a peripheral region R2 located on the outer periphery of the central region R1. It may have a peripheral color separation layer 1222 located at the outer periphery, of which the color conversion layer 121 overlaps the central color separation layer 1220 and the peripheral color separation layer 1222. Specifically, the color conversion layer 121 is, for example, a continuous thin film, and the light entrance surface S1 of the color conversion layer 121 has a central region R1 and a peripheral region R2 located on the outer periphery of the central region R1. The center region R1 of the color conversion layer 121 and the center region color separation layer 1220 overlap, and the peripheral region R2 of the color conversion layer 121 and the peripheral region color separation layer 1222 overlap. Note that the shape and/or size of the central region R1 and peripheral region R2 of the color conversion layer 121 may change depending on design needs, but is not limited to those shown in FIGS. 2A and 2B.

The distance DT between the inner edge IE of the peripheral region R2 and the edge OE of the light incident surface S1 is 30 mm or less. Correspondingly, the distance between the inner edge E1222 of the peripheral area color separation layer 1222 and the edge E122 of the two-way color separation layer 122 (equal to the distance DT) may be less than or equal to 30 millimeters. The center area color separation layer 1220 and the peripheral area color separation layer 1222 can have different transmittances or different reflectances to improve the color cast problem. Note that although the widths of each side of the peripheral region R2 and the peripheral region color separation layer 1222 shown in FIGS. 2A and 2B are all the same (for example, the distance DT), the present invention is not limited to this, and can be applied to other implementations. In the example, the widths of each side of the peripheral region R2 and the peripheral region color separation layer 1222 may have different widths or shapes according to different needs.

FIG. 2B shows an embodiment in which the central region color separation layer 1220 and the peripheral region color separation layer 1222 of the two-way color separation layer 122 have different transmittances (or reflectances) due to different materials. As shown in FIG. 2B, the central area color separation layer 1220 includes a rectangular pattern surrounded by the peripheral area color separation layer 1222. The area of this rectangular pattern is, for example, equal to the area of the central region R1. In FIG. 2B, the center area color separation layer 1220 and the peripheral area color separation layer 1222 may have the same coverage (all 100%), but the center area color separation layer 1220 and the peripheral area color separation layer 1222 may have the same coverage (all 100%). Manufactured from different materials. By selecting the materials, the respective transmittance and reflectance of the central region color separation layer 1220 and the peripheral region color separation layer 1222 can be controlled.

For example, the central region color separation layer 1220 may have a first transmittance for the luminous flux B1, and the peripheral region color separation layer 1222 may have a second transmittance for the luminous flux B1. The peripheral color separation layer 1222 may have the same transmittance and reflectance at different positions. The first transmittance may be greater than the second transmittance, thereby making it possible to increase the luminous flux B1 output from the central region R1. Conversely, the first transmittance may be smaller than the second transmittance, thereby making it possible to increase the luminous flux B1 output from the peripheral region R2. Further, the central area color separation layer 1220 may have a first reflectance with respect to the luminous flux B2, and the peripheral area color separation layer 1222 may have a second reflectance with respect to the luminous flux B2. The first reflectance may be smaller than the second reflectance, thereby making it possible to increase the luminous flux B2 output from the peripheral region R2. Conversely, the first transmittance may be greater than the second transmittance, thereby making it possible to increase the luminous flux B2 output from the central region R1. Thereby, the problem of color cast can be improved by adjusting the transmittance and reflectance of each region for the light flux B1 and the light flux B2.

See Figure 3. FIG. 3 is a bottom view of another example of a two-way color separation layer. In this example, the center region color separation layer 1220A includes a plurality of two-way color separation units U. These two-way color separation units U are arranged in a chessboard-like pattern at intervals along the first direction D1 and the second direction D2. Further, the peripheral area color separation layer 1222 includes a frame pattern connected to a plurality of two-way color separation units U on the outer periphery. Note that the transmittance (or reflectance) here is calculated using an area average method. For example, the transmittance (or reflectance) of the center area color separation layer 1220A is the transmittance (or reflectance) of the area where the plurality of two-way color separation units U are located in the corresponding center area R1 of FIG. 2A, and the center area color separation layer 1220A. This is the average sum of transmittances (or reflectances) of regions other than the plurality of two-way color separation units U in region R1.

FIG. 3 shows an embodiment in which the transmittance (or reflectance) is different due to the different coverage. In FIG. 3, the center area color separation layer 1220A and the peripheral area color separation layer 1222 may be made of the same material, but the center area color separation layer 1220A and the peripheral area color separation layer 1222 have different coverages. You may do so. The coverage rate of the central area color separation layer 1220A is defined as the rate at which the central area R1 is covered by a plurality of two-way color separation units U, and the coverage rate of the peripheral area color separation layer 1222 is defined as the rate at which the central area R1 is covered by two-way color separation units U. Defined as the proportion covered by the material. In this example, the coverage rates of the central area color separation layer 1220A and the peripheral area color separation layer 1222 are 50% and 100%, respectively. Thereby, the luminous flux B1 output from the central region R1 can be increased, that is, the luminous flux B2 output from the central region R1 can be decreased. By adjusting the output amount for the luminous flux B1 and the luminous flux B2 of each region in this way, the luminous flux ratio of the illumination luminous flux I of each region can be changed and the color cast problem can be improved. In another embodiment, the materials of the plurality of two-way color separation units U and the materials of the peripheral area color separation layer 1222 may be different materials.

FIG. 4 is a cross-sectional view of an optical film piece F that can be used in the display device 1 shown in FIG. Note that the color conversion layer 121, two-way color separation layer 122, and diffusion sheet 123 in FIG. 1 can be assembled easily by integrating them as an optical film piece F, but the present invention is not limited to this. .

FIG. 5 is a sectional view of a display device 2 in a second embodiment of the present invention. As shown in FIG. 5, the main differences between display device 2 and display device 1 are as follows. In the display device 2, the light source module 22 is an edge type light source module. Furthermore, the light source module 22 may further include a light guide plate 220. The light source 120 is installed near the light guide plate 220, and the light beam B1 output from the light source 120 enters the light guide plate 220 via the side surface SS of the light guide plate 220. The light beam B1 that has entered the light guide plate 220 propagates from the side adjacent to the light source 120 to the side away from the light source 120 due to total internal reflection (TIR). A plurality of microstructures (not shown) may be formed on the bottom surface SB of the light guide plate 220 to destroy total internal reflection, so that the light beam B1 exits from the top surface ST of the light guide plate 220. be able to. In the configuration of an edge type light source module, the light source module 22 may or may not include the diffusion sheet 123 in FIG. 1. When the light source module 22 includes the diffusion sheet 123 in FIG. 1, the color conversion layer 121, the two-way color separation layer 222, and the diffusion sheet 123 can be integrated as an optical film piece F shown in FIG. 4, but the present invention is not limited to this.

The pattern design of the two-way color separation layer 222 and the arrangement of the color conversion layer 121 of the two-way color separation layer 222 on the light incident surface S1 in FIG. 5 may be changed depending on different design needs. FIG. 6 is a bottom view of the light source 120, color conversion layer 121, and two-way color separation layer 222 in FIG. See FIGS. 2A and 6. The main differences between the two-way color separation layer 222 and the two-way color separation layer 122 in FIG. 2B are as follows. In FIG. 6, the two-way color separation layer 222 has a peripheral color separation layer 2222 overlapping the peripheral region R2, but does not have the central color separation layer 1220 in FIG. 2B. Note that the present invention is not limited to this, and in another embodiment, the region overlapping with the center region R1 in FIG. 6 is colored by installing a center region color separation layer 1220 according to needs. It is also possible to achieve the ability to adjust.

The distance between the inner edge E2222 of the peripheral area color separation layer 2222 and the edge E222 of the two-way color separation layer 222 (equal to the distance DT) is also 30 mm or less. Additionally, the peripheral area color separation layer 2222 has different transmittances or different reflectances at different positions. Furthermore, the peripheral area color separation layer 2222 may have a first portion 2222A, two second portions 2222B, and a third portion 2222C, where the first portion 2222A is opposite to the third portion 2222C and the second portion 2222C is opposite to the third portion 2222C. Portion 2222A is more adjacent to light source 120 than third portion 2222C. The two second parts 2222B are opposite each other and are connected to the first part 2222A and the third part 2222C, respectively. The first portion 2222A, the two second portions 2222B, and the third portion 2222C may have different transmittances or different reflectances.

Regarding the conventional light source module, the light intensity of the light beam B1 outputted from the side of the light source module closer to the light source is higher than the light intensity of the light beam B1 outputted from the side of the light source module farther from the light source. In addition, the light intensity of the light beam B1 output from both sides of the light source module connecting the side near the light source and the side far from the light source is lower than the light intensity of the light beam B1 output from the side near the light source, but higher than the light intensity of the luminous flux B1 output from the far side. In order to improve the color cast problem described above, the transmittance of the third portion 2222C to the luminous flux B1 is greater than or equal to the transmittance of each of the second portions 2222B to the luminous flux B1, and The transmittance of each of the portions 2222B to the luminous flux B1 may be greater than the transmittance of the first portion 2222A to the luminous flux B1, thereby improving the uniformity of output of the luminous flux B1. . Note that the quantity, distribution, and transmittance or reflectance of each part of the peripheral area color separation layer 2222 may vary depending on needs (for example, may vary according to the arrangement method of the light source); Not limited. Further, this embodiment is not limited to being applied to an edge type light source, and can also be applied to other light source forms (for example, a direct type light source), where the peripheral area color separation layer has different transmittances or different reflectances at different positions. An embodiment having the following can be adopted.

From the above, the embodiments of the present invention have at least the following advantages or effects. In the light source module according to the embodiment of the present invention, by reflecting the second light flux propagating toward the inside of the light source module using the two-way color separation layer, more of the second light flux is output to the outside of the light source module. You can make it possible. Therefore, the light source module according to the embodiment of the present invention can improve the light recovery rate and the light output efficiency. Further, the two-way color separation layer can be arranged in accordance with the problem of color cast in different areas of the light source module, so that the colors of the luminous fluxes output from different areas of the light source module can be matched. Therefore, the light source module according to the embodiment of the present invention can further improve the problem of color cast at the edge of the light source module, and the display device according to the embodiment of the present invention can Since it is adopted, it has good display quality.

Although the present invention has been disclosed above based on the preferred embodiments described above, the preferred embodiments described above are not intended to limit the present invention, and those skilled in the art will understand the technical concept of the present invention. Since minor changes and embellishments may be made to the present invention without departing from its scope, the scope of protection of the present invention shall be based on that defined in the appended claims. Moreover, it is not necessary for any embodiment of the invention or the claims to achieve all objects or advantages or features disclosed in the invention. Further, a part of the abstract and the title of the invention are only used to assist in searching documents, and do not limit the technical scope of the present invention. Additionally, terms such as "first," "second," and the like used herein or in the claims name elements or distinguish between other embodiments or scopes. It is not intended to limit the upper or lower limit on the quantity of elements.

1, 2: Display device
10:Display panel
12, 22: Light source module
120: Light source
1200: Light emitting element
121: Color conversion layer
122, 222: Two-way color separation layer
1220: Center area color separation layer
1222, 2222: Peripheral area color separation layer
123: Diffusion sheet
124: Reflective sheet
125: Brightening film
1250: First brightening film
1252: Second brightening film
126: Double brightening film
220: Light guide plate
2222A: First part
2222: Second part
2222C: Third part
B1, B1', B2, B2A, B2A', B2B, B2B': Luminous flux
D1: First direction
D2: Second direction
DT: distance
F: Optical film piece
I: Illumination luminous flux
IE, E1222, E2222: Inner edge
OE, E122, E222: marginal area
R1: central area
R2: Peripheral area
S1: Light entrance surface
S2: Idemitsu surface
SB: Bottom
SS: Side
ST: Top surface
T1: Triangular prism
T2: Triangular prism
U: Two-way color separation unit

Claims (11)

A light source module comprising a light source, a color conversion layer and a two-way color separation layer,
the light source provides a first beam of light;
The color conversion layer is installed in a propagation path of the first light flux, and the color conversion layer is used to convert the first light flux into a second light flux,
The two-way color separation layer is installed on the light incident surface of the color conversion layer to receive the first luminous flux from the light source earlier than the color conversion layer,
The two-way color separation layer allows the first light flux to pass through and reflects the second light flux ,
The two-way color separation layer has a center area color separation layer and a peripheral area color separation layer located on the outer periphery of the center area color separation layer, and the color conversion layer has a center area color separation layer and a peripheral area color separation layer. The light source module overlaps a color separation layer, and the center area color separation layer and the peripheral area color separation layer have different transmittances or different reflectances . The light source module according to claim 1 ,
The light source module, wherein the central area color separation layer and the peripheral area color separation layer have different coverage rates. The light source module according to claim 1 ,
The central area color separation layer has a first transmittance for the first light flux, and the peripheral area color separation layer has a second transmittance for the first light flux, and the peripheral area color separation layer has a second transmittance for the first light flux. The light source module has a transmittance greater than the second transmittance. The light source module according to claim 1 ,
The peripheral color separation layer has the same transmittance and the same reflectance at different positions. The light source module according to claim 1,
The light input surface has a central region and a peripheral region located on the outer periphery of the central region, and the peripheral region color separation layer overlaps the peripheral region . The light source module according to claim 5 ,
The light source module, wherein the peripheral area color separation layer has different transmittance or different reflectance at different positions. The light source module according to claim 5 ,
The light source module, wherein the distance between the inner edge of the peripheral area color separation layer and the edge of the two-way color separation layer is 30 mm or less. The light source module according to claim 1,
further including a diffusion sheet;
The two-way color separation layer is located between the color conversion layer and the diffusion sheet. The light source module according to claim 8 ,
A light source module, wherein the color conversion layer, the two-way color separation layer, and the diffusion sheet are integrated as an optical film piece. The light source module according to claim 1,
further comprising a reflective sheet, a brightening film and a double brightening film,
The two-way color separation layer is located between the color conversion layer and the reflective sheet,
The color conversion layer is located between the reflective sheet and the brightening film,
The light source module, wherein the brightening film is located between the color conversion layer and the double brightening film. A display device including a display panel and a light source module,
The light source module is installed to overlap the display panel, and includes a light source, a color conversion layer, and a two-way color separation layer,
the light source provides a first beam of light;
The color conversion layer is installed in a propagation path of the first light flux, and the color conversion layer is used to convert the first light flux into a second light flux,
The two-way color separation layer is installed on the light incident surface of the color conversion layer to receive the first luminous flux from the light source earlier than the color conversion layer,
The two-way color separation layer allows the first light flux to pass through and reflects the second light flux ,
The two-way color separation layer has a center area color separation layer and a peripheral area color separation layer located on the outer periphery of the center area color separation layer, and the color conversion layer has a center area color separation layer and a peripheral area color separation layer. A display device , wherein the central region color separation layer and the peripheral region color separation layer overlap a color separation layer and have different transmittances or different reflectances .

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