JP2021005550A - Light source module and display device - Google Patents

Abstract

To provide a light source module and a display device.SOLUTION: A light source module includes a light source, a color conversion layer, and a two directional color separation layer. The light source provides a first light flux. The color conversion layer is installed in a propagation path of the first light flux, and converts the first light flux to a second light flux. The two directional color separation layer is installed on a light incident surface of the color conversion layer, and receives the first light flux from the light source sooner than the color conversion layer. The two directional color separation layer transmits the first light flux and reflects the second light flux. A display device includes such a light source module. The light source module and the display device produce effects to improve light emission efficiency.SELECTED DRAWING: Figure 1

Description

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

The light source module in the display device has a plurality of types of product forms, and one of them employs a combination of a light emitting element and a color conversion layer to provide an illumination luminous flux. The luminous flux generated by the color conversion layer is divergent, and in the process in which a part of the luminous flux propagates toward the outside of the light source module, it may return to the inside of the light source module due to reflection by the interface. Further, since the light loss increases as the optical path increases, the conventional display device that provides the illumination luminous flux by adopting the combination of the light emitting element and the color conversion layer has a low light recovery rate and a low light emission efficiency. There are problems such as.

Since this "background technique" part is only for assisting in understanding the contents of the present invention, the contents disclosed in this "background technique" part are not known to those skilled in the art. May include technology. Therefore, the content disclosed in the "background technique" part is known to those skilled in the art before the filing of the present invention, that the content or the problem to be solved by one or more embodiments of the present invention is already known to those skilled in the art. Does not mean that it has been done.

One object of the present invention is to provide a light source module capable of improving light recovery rate and light emission efficiency.

Another object of the present invention is to provide a display device having 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 all or all of the above mentioned objectives or other objectives, according to one embodiment of the invention, a light source module is provided which includes a light source, a color conversion layer and a two-way color separation layer. including. The light source provides a first luminous flux. The color conversion layer is installed in the propagation path of the first luminous flux and is used to convert the first luminous flux into the second luminous flux. The two-way color separation layer is installed on the incoming surface of the color conversion layer and receives the first light flux from the light source earlier than the color conversion layer, of which the two-way color separation layer allows the first light flux to pass through the first light beam. Reflects two luminous flux.

In order to achieve one or all or all of the above-mentioned objectives or other objectives, according to one 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 so as to overlap the display panel.

As mentioned above, the examples 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, a larger amount of the second luminous flux is generated by reflecting the second luminous flux (converted luminous flux) propagating toward the inside of the light source module by using the two-way color separation layer. It is possible to output to the outside of. Therefore, the light source module in the embodiment of the present invention can improve the light recovery rate and the light emission efficiency, and the display device in the embodiment of the present invention adopts the above-mentioned light source module, so that the display quality is good. Has.

In order to further clarify the above-mentioned features and advantages of the present invention, examples will be described below in detail with reference to the attached drawings.

It is sectional drawing of the display device according to 1st Embodiment of this invention. It is a bottom view of the color conversion layer in FIG. It is a bottom view of the two-way color separation layer in FIG. It is a bottom view of another example of a two-way color separation layer. FIG. 5 is a cross-sectional view of an optical film piece that can be used in the display device shown in FIG. It is sectional drawing of the display device by 2nd Embodiment of this invention. It is a bottom view of the light source, the color conversion layer, and the two-way color separation layer in FIG.

The above and other technical contents, features, functions and effects of the present invention will be clarified by detailed description in the following preferred embodiments based on the accompanying drawings. It should be noted that the terms related to the directions referred to in the following examples, for example, up, down, left, right, front, back, etc., are merely the directions of the attached drawings. Therefore, the terminology used is for the purpose of explaining the present invention and not for limiting the present invention.

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

The light source module 12 is installed so as to overlap the display panel 10 and is used to provide the illumination flux I. For example, the light source module 12 may be installed below the display panel 10 and serve as a backlight module for 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 type light source module, one embodiment of the direct type 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 two-way color separation layer 122. The light source 120 is used to provide the first luminous flux (luminous flux B1). For example, the 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 installed in the propagation path of the luminous flux B1. In the direct light source module, the color conversion layer 121 is installed above the light source 120, and the light incoming surface S1 of the color conversion layer 121 is between the light source 120 and the light emitting surface S2 of the color conversion layer 121. The light entry surface S1 is a surface for the color conversion layer 121 to receive the light flux B1 from the light source 120. In other words, the luminous flux B1 enters the color conversion layer 121 via the light entering surface S1. The light emitting surface S2 is a surface facing the light entering surface S1, and the light emitting surface S2 is located between the light entering 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 luminous flux B1 propagating to the color conversion layer 121 is converted into the luminous flux B2 by the color conversion layer 121, and the other part of the luminous flux B1 propagating to the color conversion layer 121 passes through the color conversion layer 121. That is, the luminous flux is B1'. The illumination luminous flux I includes at least the luminous flux B2 converted by the color conversion layer 121 and the luminous 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. The wavelength of the luminous flux B2 is longer than that of the luminous flux B1 because a material such as fluorescent powder or quantum dots can absorb the luminous flux of a short wavelength and emit a luminous flux of a long wavelength.

In one embodiment, the light emitting element 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'are blue luminous fluxes, and the luminous flux B2 may include a yellow luminous flux. The illumination luminous flux I is a white luminous flux formed by mixing a blue luminous flux and a yellow luminous flux. In another embodiment, the color conversion layer 121 may include a red color conversion material and a green color conversion material, and the light flux B2 may include a red light flux and a green light flux. In this way, the illumination luminous flux I is a white luminous flux formed by mixing a red luminous flux, a green luminous flux and a blue luminous flux. 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 the above.

The two-way color separation layer 122 is installed on the light receiving surface S1 of the color conversion layer 121, whereby the two-way color separation layer 122 can receive the light flux B1 from the light source 120 earlier than the color conversion layer 121. .. Further, the bidirectional color separation layer 122 may be installed on the light input surface S1 of the color conversion layer 121, and the bidirectional color separation layer 122 may be installed directly on the light input surface S1. The 122 may be indirectly installed on the light receiving surface S1. For example, in the method of forming the two-way color separation layer 122 and the color conversion layer 121, the color conversion layer 121 and the two-way color are sequentially formed on the surface of the thin film or the substrate (hereinafter referred to as "thin film / substrate"). Forming the separation layer 122, forming the two-way color separation layer 122 (or the color conversion layer 121) on the thin film / substrate having the color conversion layer 121 (or the two-way color separation layer 122), or the color conversion layer. It may include joining the thin film / substrate having 121 and the thin film / substrate having the bidirectional color separation layer 122.

The two-way color separation layer 122 allows the color conversion layer 121 to receive the light flux B1 by passing the light flux B1. Further, 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 input surface S1 of the color conversion layer 121 propagates away from the display panel 10 due to reflection by another optical element or reflection by an interface. By reflecting the luminous flux B2 (for example, the luminous flux B2A, B2B), the luminous fluxes B2A and B2B that originally propagate in the direction away from the display panel 10 are propagated to the display panel 10, that is, the luminous flux B2A'and the luminous flux B2B. 'become. In this way, more luminous flux B2 (for example, luminous flux B2, luminous flux B2A'and luminous flux B2B') can be output to the outside of the light source module 12, so that the light recovery rate and the light emission efficiency can be improved. ..

In this embodiment, the light source module 12 may further include other elements and / or a film layer, depending on different needs. By way of example, the light source module 12 may further include a diffuse sheet 123, a reflective sheet 124, a brightening film 125 and a double brightening film 126.

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

The color conversion layer 121 is located between the reflective sheet 124 and the brightening film 125. The brightening film 125 is located between the color conversion layer 121 and the double brightening film 126. The brightening film 125 and the double brightening film 126 are used to concentrate the luminous flux and achieve the brightening effect. For example, the brightening film 125 may include a first brightening film 1250 and a second brightening film 1252, of 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 columnar prisms T1. Each of these triangular columnar prisms T1 extends along the first direction D1 and is arranged along the second direction D2. The first direction D1 and the second direction D2 are, for example, perpendicular to each other. The second brightening film 1252 may include a plurality of triangular columnar prisms T2. Each of these triangular columnar prisms T2 extends along the second direction D2 and is arranged along the first direction D1.

Regarding 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 entry surface S1 in the present invention, it corresponds to the entire light input surface S1 of the color conversion layer 121. Besides being able to install the two-way color separation layer 122, it may be changed according to the needs of different designs. For example, in a conventional display device, when it comes to the light source module, color cast problems can occur in the local area of the light source module due to assembly, design, light leakage at the edges, light interference, etc. There is sex. Generally speaking, color cast problems occur primarily within the range of 30 millimeters (millimeters) from the edges of the light source module. In order to meet the needs of narrow frames, the frame of the display device becomes narrower and narrower, and the problem of color casting of the edge area is that the edge area is not effectively shielded by the frame or the frame effectively shields the unexpected luminous flux. It gradually appears because it cannot be done. In the display device 1, the center of the light source module 12 of the luminous flux B1 and / or the luminous flux B2 is determined by 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 entering surface S1. The output ratio in the region and / or the peripheral region can be controlled, which can improve the color cast problem of the conventional display device.

FIG. 2A is a bottom view of the color conversion layer in FIG. FIG. 2B is a bottom view of the two-way color separation layer in FIG. 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 receiving surface S1 are not limited to those shown in FIGS. 2A and 2B.

See FIGS. 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 bidirectional color separation layer 122 may be a central region color separation layer 1220 and a central region color separation layer 1220. The peripheral region color separation layer 1222 located on the outer periphery may be provided, of which the color conversion layer 121 overlaps with the central region color separation layer 1220 and the peripheral region color separation layer 1222. Specifically, the color conversion layer 121 is, for example, a continuous thin film, of which the light receiving 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 central region R1 of the color conversion layer 121 and the central 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. The shape and / or size of the central region R1 and the peripheral region R2 of the color conversion layer 121 may be changed according to the design needs, but are 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 entry surface S1 is 30 mm or less. Correspondingly, the distance (equal to the distance DT) between the inner edge portion E1222 of the peripheral region color separation layer 1222 and the edge portion E122 of the two-way color separation layer 122 may be 30 mm or less. The central region color separation layer 1220 and the peripheral region color separation layer 1222 can improve the problem of color casting by having different transmittances or different reflectances. The widths of the respective sides 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, distance DT), but the present invention is not limited to this, and other embodiments are made. In the example, the width 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 transmittance (or reflectance) differs depending on the materials of the central region color separation layer 1220 and the peripheral region color separation layer 1222 of the two-way color separation layer 122. As shown in FIG. 2B, the central region color separation layer 1220 includes a rectangular pattern surrounded by the peripheral region color separation layer 1222. The area of this quadrilateral pattern is, for example, equal to the area of the central region R1. In FIG. 2B, the central region color separation layer 1220 and the peripheral region color separation layer 1222 may have the same coverage (all 100%), but the central region color separation layer 1220 and the peripheral region color separation layer 1222 may have the same coverage. Made of different materials. By selecting the material, the transmittance and reflectance of the central region color separation layer 1220 and the peripheral region color separation layer 1222 can be controlled respectively.

For example, the central region color separation layer 1220 may have a first transmittance with respect to the luminous flux B1, and the peripheral region color separation layer 1222 has a second transmittance with respect to the luminous flux B1. Of these, the peripheral region color separation layer 1222 has the same transmittance and the same reflectance at different positions. The first transmittance may be larger than the second transmittance, which can increase the luminous flux B1 output from the central region R1. On the contrary, the first transmittance may be smaller than the second transmittance, whereby the luminous flux B1 output from the peripheral region R2 can be increased. Further, the central region color separation layer 1220 may have a first reflectance with respect to the luminous flux B2, and the peripheral region 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, which can increase the luminous flux B2 output from the peripheral region R2. On the contrary, the first transmittance may be larger than the second transmittance, whereby the luminous flux B2 output from the central region R1 can be increased. Thereby, the problem of color casting can be improved by adjusting the transmittance and the reflectance for the luminous flux B1 and the luminous flux B2 in each region.

See Figure 3. FIG. 3 is a bottom view of another example of the two-way color separation layer. In this example, the central 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 slab-like pattern at intervals along the first direction D1 and the second direction D2. Further, the peripheral region color separation layer 1222 includes a frame-shaped pattern connected to a plurality of two-way color separation units U on the outer circumference. The transmittance (or reflectance) here is calculated by the region averaging method. For example, the transmittance (or reflectance) of the central region color separation layer 1220A is the transmittance (or reflectance) of the region where the plurality of two-way color separation units U are located in the central region R1 of FIG. 2A, and the center. It is the average of the sum of the transmittances (or reflectances) of the regions other than the plurality of two-way color separation units U in the region R1.

FIG. 3 shows an embodiment in which the transmittance (or reflectance) differs depending on the coverage. In FIG. 3, the central region color separation layer 1220A and the peripheral region color separation layer 1222 may be made of the same material, but the central region color separation layer 1220A and the peripheral region color separation layer 1222 have different coverage rates. You may. The coverage of the central region color separation layer 1220A is defined as the ratio at which the central region R1 is covered by a plurality of bidirectional color separation units U, and the coverage of the peripheral region color separation layer 1222 is such that the peripheral region R2 is bidirectional color separation. Defined as the ratio covered by the material. In this embodiment, the coverage of the central region color separation layer 1220A and the peripheral region color separation layer 1222 are 50% and 100%, respectively. As a result, 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 in each region in this way, the luminous flux ratio of the illumination flux I in each region can be changed, and the problem of color casting can be improved. In another embodiment, the material of the plurality of two-way color separation units U and the material of the peripheral region 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. The color conversion layer 121, the two-way color separation layer 122, and the diffusion sheet 123 in FIG. 1 can be easily assembled by integrating them as an optical film piece F, but the present invention is not limited thereto. ..

FIG. 5 is a cross-sectional view of the display device 2 according to the second embodiment of the present invention. As shown in FIG. 5, the main differences between the display device 2 and the 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 in the vicinity of the light guide plate 220, and the luminous flux 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 luminous flux 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 so as to destroy all internal reflections, whereby the luminous flux B1 is emitted from the top surface ST of the light guide plate 220. be able to. In the configuration of the edge type light source module, the light source module 22 may or may not include the diffusion sheet 123 in FIG. 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 the optical film piece F shown in FIG. 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 receiving surface S1 in FIG. 5 may be changed according to different design needs. FIG. 6 is a bottom view of the light source 120, the color conversion layer 121, and the 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 region color separation layer 2222 that overlaps the peripheral region R2, but does not have the central region color separation layer 1220 in FIG. 2B. The present invention is not limited to this, and in another embodiment, the region overlapping the central region R1 in FIG. 6 is color cast by installing the central region color separation layer 1220 according to the needs. The ability to adjust can also be achieved.

The distance (equal to the distance DT) between the inner edge portion E2222 of the peripheral region color separation layer 2222 and the edge portion E222 of the two-way color separation layer 222 is also 30 mm or less. Also, the peripheral region color separation layer 2222 has different transmittances or different reflectances at different positions. Furthermore, the peripheral region color separation layer 2222 may have a first portion 2222A, two second portions 2222B and a third portion 2222C, of which the first portion 2222A faces the third portion 2222C and is the first. Part 2222A is closer to light source 120 than part 3 2222C. The two second parts 2222B face each other and are individually connected to the first part 2222A and the third part 2222C. The first part 2222A, the two second parts 2222B and the third part 2222C may have different transmittances or different reflectances.

Speaking of the conventional light source module, the light intensity of the light flux B1 output from the side of the light source module near the light source is higher than the light intensity of the light flux B1 output from the side of the light source module far from the light source. Further, the light intensity of the luminous flux B1 output from both sides of the light source module connecting the side closer to the light source and the side far from the light source is lower than the light intensity of the luminous flux B1 output from the side close to the light source, but the light source. It is higher than the light intensity of the luminous flux B1 output from the side far from. To remedy the color cast problem described above, the transmittance of the third portion 2222C with respect to the luminous flux B1 may be larger than the transmittance of the second portion 2222B with respect to each luminous flux B1. The transmittance of the first portion 2222A with respect to the luminous flux B1 may be larger than the transmittance of the first portion 2222A with respect to the luminous flux B1, which can improve the uniformity of the light emission of the luminous flux B1. .. The quantity, distribution, and transmittance or reflectance of each part of the peripheral region color separation layer 2222 may be changed according to the needs (for example, may be changed 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 other light source forms (for example, a direct type light source) also have different transmittances or different reflectances at different positions of the above-mentioned peripheral region color separation layer. The embodiment having the above can be adopted.

From the above, the examples 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, a larger amount of the second luminous flux is output to the outside of the light source module by reflecting the second luminous flux propagating toward the inside of the light source module using the two-way color separation layer. Can be made to be possible. Therefore, the light source module in the embodiment of the present invention can improve the light recovery rate and the light emission efficiency. Further, the two-way color separation layer can be arranged according to the problem of color casting of different regions in the light source module so that the colors of the light flux output from the different regions in 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 casting of the edge portion of the light source module, and the display device according to the embodiment of the present invention uses the above-mentioned light source module. Since it is adopted, it has good display quality.

The present invention has been disclosed as described above based on the above-mentioned preferred examples, but the above-mentioned preferred examples are not intended to limit the present invention, and those skilled in the art can understand the technical idea of the present invention. As long as the present invention is not deviated from the scope of the invention, minor changes and colorings can be made to the present invention. Therefore, the scope of protection of the present invention is based on the scope of the attached claims. Also, none of the examples or claims of the invention need to achieve all the purposes or advantages or features disclosed in the invention. Further, a part of the abstract and the title of the invention are for the purpose of assisting the search of the literature, and do not limit the technical scope of the present invention. In addition, terms such as "first" and "second" referred to in the present specification or the scope of claims name an element or distinguish other examples or scopes. It is for the purpose of limiting the upper or lower limit of 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: Central region 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: Part 1
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 flux
IE, E1222, E2222: Inner edge
OE, E122, E222: Margin
R1: Central area
R2: Peripheral area
S1: Light entrance surface
S2: Idemitsu surface
SB: Bottom
SS: Side
ST: Top
T1: Triangular prism
T2: Triangular prism
U: Two-way color separation unit

Claims (12)

A light source module that includes a light source, a color conversion layer, and a two-way color separation layer.
The light source provides a first luminous flux and
The color conversion layer is installed in the propagation path of the first luminous flux, and the color conversion layer is used to convert the first luminous flux into a second luminous flux.
By installing the two-way color separation layer on the light receiving surface of the color conversion layer, the first light flux from the light source is received earlier than the color conversion layer.
The two-way color separation layer is a light source module that allows the first luminous flux to pass through and reflects the second luminous flux. The light source module according to claim 1.
The two-way color separation layer has a central region color separation layer and a peripheral region color separation layer located on the outer periphery of the central region color separation layer, and the color conversion layer includes the central region color separation layer and the peripheral region. A light source module that overlaps with the color separation layer, and the central region color separation layer and the peripheral region color separation layer have different transmission rates or different reflectances. The light source module according to claim 2.
The central region color separation layer and the peripheral region color separation layer are light source modules having different coverage rates. The light source module according to claim 2.
The central region color separation layer has a first transmittance with respect to the first light source, and the peripheral region color separation layer has a second transmittance with respect to the first light source, and the first transmission. A light source module having a higher transmittance than the second transmittance. The light source module according to claim 2.
The peripheral region color separation layer is a light source module having the same transmittance and the same reflectance at different positions. The light source module according to claim 1.
A light source module in which the light entering surface has a central region and a peripheral region located on the outer periphery of the central region, and the bidirectional color separation layer has a peripheral region color separation layer that overlaps the peripheral region. The light source module according to claim 6.
The peripheral region color separation layer is a light source module having different transmittances or different reflectances at different positions. The light source module according to claim 6.
A light source module in which the distance between the inner edge portion of the peripheral region color separation layer and the edge portion of the two-way color separation layer is 30 mm or less. The light source module according to claim 1.
Including a diffusion sheet,
The two-way color separation layer is a light source module located between the color conversion layer and the diffusion sheet. The light source module according to claim 9.
A light source module in which 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 including 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 brightening film is a light source module located between the color conversion layer and the double brightening film. A display device that includes a display panel and a light source module.
The light source module is installed so as 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 luminous flux and
The color conversion layer is installed in the propagation path of the first luminous flux, and the color conversion layer is used to convert the first luminous flux into a second luminous flux.
By installing the two-way color separation layer on the light receiving surface of the color conversion layer, the first light flux from the light source is received earlier than the color conversion layer.
A display device in which the two-way color separation layer passes the first light flux and reflects the second light flux.

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