WO2020067211A1

WO2020067211A1 - Filter substrate, display panel and display device

Info

Publication number: WO2020067211A1
Application number: PCT/JP2019/037700
Authority: WO
Inventors: 一行峪中; 秀森戸; 賢一山内
Original assignee: 大日本印刷株式会社
Priority date: 2018-09-25
Filing date: 2019-09-25
Publication date: 2020-04-02
Also published as: JPWO2020067211A1; JP7411163B2

Abstract

This filter substrate 30 includes: a light shielding matrix 38; and a design unit 37 laminated on the light shielding matrix 38. The light shielding matrix 38 partitions a plurality of transmission units 39. The design unit 37 forms a design. The design unit 37 partitions the plurality of transmission units 39 together with the light shielding matrix 38.

Description

Filter substrate, display panel and display device

The present invention relates to a filter substrate, a display panel having the filter substrate, and a display device having the filter substrate or the display panel.

表示 Display devices for displaying images are widely used. Such a display device is usually observed in black when no image is displayed. On the other hand, in the case of surface members such as automobiles, furniture, and house building materials, design is very important. At present, display devices applied to various fields are not only expected to have a function of simply displaying an image on the display device, but are also required to harmonize the design with the surrounding environment.

(4) In order to impart a design property to the display device, it has been considered to provide a decorative sheet having a decorative layer at a position facing the display surface of the display device, for example, as described in JP2001-331132. The decorative sheet can give the display device a design that can be harmonized with the surrounding environment. In addition, a transmitting portion such as a hole is provided in a region facing the image display surface of the decorative sheet so that the image light of the display device can transmit through the decorative sheet.

By the way, separately providing such a decorative sheet on the display device increases the cost of providing the transmissive portion on the decorative sheet and the cost of disposing the decorative sheet on the display device. In addition, providing the decorative sheet complicates the structure of the display device.

The present invention has been made in view of the above points, and has as its object to provide a display device with designability with a low-cost and simple configuration.

The filter substrate of the present invention,
A light-blocking matrix that partitions a plurality of transmissive sections;
A design part for forming a design, the design part being stacked on the light shielding matrix and dividing the plurality of transmission parts together with the light shielding matrix.

において In the filter substrate of the present invention, the outline of the transmitting portion may include a circular arc or an elliptical arc.

In the filter substrate of the present invention, the interval between the transmission portions may be not less than 50 μm and not more than 300 μm.

において In the filter substrate of the present invention, the ratio occupied by the transmission portion in a plan view may be 3% or more and 50% or less.

フィルタ The filter substrate of the present invention may further include a colored portion formed on the transmission portion.

フィルタ The filter substrate of the present invention may further include a light emitting unit including quantum dots formed in the transmission unit.

フィルタ The filter substrate of the present invention may further include a color mixture prevention layer formed between the light shielding matrix and the design part.

In the filter substrate of the present invention, the design part may be made of a cured product of a composition containing a photoreactive material.

において In the filter substrate of the present invention, the design part may include a photoreactive material.

In the filter substrate of the present invention, the design portion may form a design of a picture composed of a combination of two or more colors.

In the filter substrate of the present invention, the design portion may form a design of a picture formed by halftone dots.

The display panel of the present invention includes:
Any one of the filter substrates described above,
A liquid crystal layer disposed on the light-shielding matrix side of the filter substrate and driven by a GH method, or a light-emitting layer having a light-emitting element provided at a position corresponding to each transmission unit.

In the display panel of the present invention, the light emitting element may be an organic EL light emitting element, a micro LED light emitting element, or a quantum dot light emitting element.

The display device of the present invention includes any one of the above-described filter substrates or the above-described display panel.

The display device of the present invention,
Further comprising an outer frame portion surrounding the filter substrate,
The design part may display the design darker than the outer frame part.

According to the present invention, it is possible to provide a display device with designability with a low-cost and simple configuration.

FIG. 1A is an exploded perspective view schematically showing each element of an example of a display device. FIG. 1B is an exploded perspective view schematically showing each element of another example of the display device. FIG. 2 is a front view of the display device of FIG. FIG. 3 is an enlarged front view showing a part of the display panel of the display device in FIG. 1, in which a filter substrate is partially omitted. FIG. 4A is an example of a cross-sectional view of the display device of FIG. 1A along the line IV-IV of FIG. FIG. 4B is another example of a cross-sectional view of the display device of FIG. 1A taken along the line IV-IV of FIG. FIG. 4C is a cross-sectional view of the display device of FIG. 1B along the line IV-IV of FIG. FIG. 5 is a diagram illustrating an example of a method of manufacturing a filter substrate. FIG. 6 is a diagram illustrating an example of a method of manufacturing a filter substrate. FIG. 7 is a diagram illustrating an example of a method for manufacturing a filter substrate. FIG. 8 is a diagram for explaining another example of the method for manufacturing a filter substrate. FIG. 9 is a view for explaining another example of the method for manufacturing a filter substrate. FIG. 10 is a diagram for explaining another example of the method of manufacturing a filter substrate. FIG. 11 is a view for explaining another example of the method of manufacturing the filter substrate. FIG. 12 is a diagram for explaining another example of the method of manufacturing the filter substrate. FIG. 13 is a view for explaining another example of the method of manufacturing the filter substrate. FIG. 14 is a diagram for explaining a method for manufacturing a filter substrate. FIG. 15 is a diagram for explaining a method of manufacturing a filter substrate. FIG. 16 is a diagram for explaining a method of manufacturing a filter substrate. FIG. 17 is a cross-sectional view illustrating an example of a conventional display device. FIG. 18 is an enlarged front view showing a part of an example of a conventional display device. FIG. 19 is a cross-sectional view illustrating a modification of the display device and the filter substrate.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, the scale and the size ratio in the vertical and horizontal directions are appropriately changed and exaggerated for the sake of convenience of illustration and understanding.

Note that in this specification, the terms “layer”, “sheet”, and “film” are not distinguished from each other based only on the difference in names. For example, the term “layer” is a concept including a member that can be called a sheet or a film.

Further, in this specification, to specify the shape and geometric conditions and the degree thereof, for example, the term "parallel", "orthogonal", "identical" and the like, and the value of the length and angle, etc., strict Without being constrained by the meaning, it should be interpreted to include a range in which a similar function can be expected.

In the following embodiments, examples in which the present invention is applied to a liquid crystal display device (liquid crystal display) or an organic EL display device (organic EL display) will be described. That is, in the following embodiments, the display device 10 includes a display panel 20 formed of a liquid crystal display panel (LCD panel) and a display panel 20 formed of an organic EL display panel. However, the present invention is not limited to application to a liquid crystal display device or an organic EL display device, but can be applied to other display devices. The display device 10 may be a transmissive display device that displays an image by transmitting another type of light, or a reflective display device that displays an image by reflecting external light such as electronic paper. It may be. The transmissive display device is particularly preferable because a design portion on a light-shielding matrix, which will be described later, is hardly visually recognized while an image is displayed, and the image can be clearly recognized.

FIGS. 1A and 1B are exploded perspective views schematically showing a display device 10 according to another embodiment of the present invention. In the example shown in FIG. 1A, the display device 10 is a liquid crystal display device. In the example shown in FIG. 1A, the display device 10 includes a display panel 20, a surface light source device (backlight) 13 that illuminates the display panel 20 as a liquid crystal display panel from the back side (non-observer side), and the display panel 20. And an outer frame 15 surrounding the frame. Then, the display panel 20 formed as a liquid crystal display panel selectively transmits the planar light from the surface light source device 13 so that an image can be displayed on the display surface 11. On the other hand, in the example shown in FIG. 1B, the display device 10 is an organic EL display device. In the example illustrated in FIG. 1B, the display device 10 includes a display panel 20 as an organic EL display panel, and an outer frame 15 surrounding the display panel 20. In the display panel 20 formed as an organic EL display panel, an image can be displayed on the display surface 11 by selectively emitting light from an organic EL light emitting element as a light emitting element 27 described later. . In the illustrated example, the display device 10 is shown as a flat plate. However, the display device 10 may have a curved shape as each component of the display device 10 is curved.

面 The surface light source device 13 in the example shown in FIG. 1A can emit light in a planar manner. In the present embodiment, the surface light source device 13 is used as a device that illuminates the display panel 20 from the back side. As the surface light source device 13, for example, an edge light type or a direct type surface light source device can be used as appropriate.

The outer frame 15 is a member arranged around the display panel 20. The outer frame 15 is a non-display area NA (see FIG. 2) in which no image of the display device is displayed. The outer frame 15 can display a design. The design displayed by the outer frame portion 15 may be a single-color design over the entire surface, but is preferably a design having a design, and particularly preferably a design having a combination of two or more colors. The outer frame 15 displays, for example, a figure, a pattern, a design, a color, a picture, a photograph, a character, a mark, a picture such as a character or a number as a design. As a specific example, the design displayed by the outer frame portion 15 is a pattern such as a woodgrain or marble pattern or a geometric pattern. The geometric pattern may be formed by, for example, solid printing of a plurality of colors. In particular, in order to display the design of the color gradation well, it is preferable that the pattern of the woodgrain or the marble is formed by halftone dots for each color by separating the pattern to be displayed. Further, as shown in FIG. 2, an opening 16 is provided in the outer frame 15. The display panel 20 is disposed in the opening 16. The size of the opening 16 in front view is equal to or larger than the size of the display panel 20 so that the display panel 20 can be arranged. In the image display state of the display device 10, an image displayed on the display surface 11 is observed by an observer through the opening 16.

Next, the display panel 20 will be described in detail. The display panel 20 includes a display area DA (see FIG. 2) on which an image can be displayed. As shown in FIG. 3, the display area DA includes a pixel area A1 and a non-pixel area A2 which is an area outside the pixel area A1. Here, the pixel area A1 is an area in which image light for forming an image can be transmitted and a pixel which is a minimum element forming the image is located (occupied).

In the present embodiment, the pixel area A1 has a plurality of unit pixel units UP that constitute one pixel, and each unit pixel unit UP is configured by three sub-pixel units SP. Each of the three sub-pixel units SP selectively transmits a different color. That is, light in different wavelength bands is transmitted from each of the three sub-pixel units SP. Specifically, each of the three sub-pixel units SP selectively transmits red light, green light, and blue light, whereby a color image can be displayed on the display surface 11. .

{Circle around (2)} The non-pixel region A2 displays a design formed by a design portion 37 described later. The design displayed in the non-pixel region A2 is preferably a design that can be harmonized with the surrounding environment, that is, a design that can be harmonized with the outer frame portion 15. The design displayed in the non-pixel region A2 may be a single color on the entire surface, like the design of the outer frame portion 15, but is preferably a design having a design, and a design having a combination of two or more colors. Is particularly preferred. The design displayed in the non-pixel region A2 is a design similar to the design of the outer frame portion 15, for example, a pattern such as a figure, a pattern, a design, a color, a picture, a photograph, a character, a mark, a character or a number, It is a pattern such as a woodgrain or marble pattern or a geometric pattern. The geometric pattern may be formed by, for example, solid printing of a plurality of colors. In particular, in order to display the design of the color gradation well, it is preferable that the pattern of the woodgrain or the marble is formed by halftone dots for each color by separating the pattern to be displayed.

4A to 4C are cross-sectional views showing display devices 10 according to different embodiments. In the example shown in FIG. 4A, the display device 10 is a liquid crystal display device, and the display panel 20 has two

polarizing plates

36 and 56. In the example shown in FIG. 4B, the display device 10 is a liquid crystal display device, but the display panel has no polarizing plate. In the example shown in FIG. 4C, the display device 10 is an organic EL display device and has no polarizing plate.

In the example shown in FIGS. 4A and 4B, the display panel 20 as a liquid crystal display panel includes a rear substrate (also referred to as an element substrate and an array substrate) 50 disposed on the rear side (surface light source device side) and a rear surface. The filter includes a filter substrate (also referred to as a counter substrate) 30 disposed to face the side substrate 50, and a liquid crystal layer 25 sealed between the rear substrate 50 and the filter substrate 30. The side of the light shielding matrix 38 from the later-described design portion 37 of the filter substrate 30 is on the back side. That is, the liquid crystal layer 25 and the rear substrate 50 are arranged on the light shielding matrix 38 side of the filter substrate 30.

In this specification, the term “substrate” includes not only a substrate having high rigidity but not deformed, but also a deformable film-shaped substrate, so-called flexible substrate.

(4) The liquid crystal layer 25 can be applied with a voltage for each sub-pixel portion SP. Then, the orientation of the liquid crystal molecules in the liquid crystal layer 25 changes depending on whether or not a voltage is applied. In the example shown in FIG. 4A, the liquid crystal layer 25 is driven by, for example, a VA (Vertical Alignment) system, a TN (Twisted Nematic) system, or an IPS (In Plane Switching) system. A polarized component in a specific direction transmitted through a second polarizing plate 56, which will be described later, of the rear substrate 50 disposed on the light incident side (the surface light source device 13 side), for example, when passing through the liquid crystal layer 25 to which a voltage is applied. The polarization direction is rotated by 90 °, while maintaining the polarization direction when passing through the liquid crystal layer 25 to which no voltage is applied. In this case, depending on whether or not a voltage is applied to the liquid crystal layer 25, a polarized component that oscillates in a specific direction that has passed through the second polarizing plate 56 is applied to a filter substrate 30 disposed on the light exit side of the second polarizing plate 56, which will be described later. It is possible to control whether the light further passes through the first polarizing plate 36 or is absorbed and blocked by the first polarizing plate 36.

{On the other hand, in the example shown in FIG. 4B, the liquid crystal layer 25 is driven by a GH (Guest @ Host) method. The liquid crystal layer 25 driven by the GH method contains a dichroic dye. If no voltage is applied to the liquid crystal layer 25, the dichroic dye is oriented, and light passes through the liquid crystal layer without being hindered by the dichroic dye. On the other hand, when a voltage is applied to such a liquid crystal layer 25, the dichroic dye does not align, and light is absorbed by the dichroic dye of the liquid crystal layer 25 and does not transmit. As described above, the liquid crystal layer 25 driven by the GH method can control whether the liquid crystal layer 25 is transmitted or cut off without a polarizing plate depending on whether or not a voltage is applied to the liquid crystal layer 25.

よう Thus, in the display panel 20 as a liquid crystal display panel, transmission or blocking of light from the surface light source device 13 can be controlled for each sub-pixel SP.

Further, in the example shown in FIG. 4C, the display panel 20 as the organic EL display panel faces a rear substrate (also called an element substrate or an array substrate) 50 disposed on the rear side and the rear substrate 50. And an organic EL layer as the light emitting layer 26 sealed between the rear substrate 50 and the filter substrate 30. The side of the light shielding matrix 38 from the later-described design portion 37 of the filter substrate 30 is on the back side. That is, the light emitting layer 26 and the rear substrate 50 are arranged on the light shielding matrix 38 side of the filter substrate 30.

(4) The light-emitting layer 26 can be applied with a voltage for each sub-pixel unit SP. The light-emitting layer 26 includes an organic EL light-emitting element as a plurality of light-emitting elements 27 provided at a position corresponding to each sub-pixel portion SP, that is, at a position corresponding to a transmissive portion 39 described later. Then, when a voltage is applied, the light emitting element 27 in the light emitting layer 26 emits light. Specifically, the organic EL element in the organic EL layer emits light. That is, in the display panel 20 as an organic EL display panel, light emission can be controlled for each sub-pixel SP depending on whether or not a voltage is applied to the light-emitting layer 26.

The filter substrate 30 has a light-transmitting first base material 31, a light-shielding matrix (black matrix (BM)) 38 formed on the first base material 31 in a predetermined matrix pattern, and a light-shielding matrix 38. And a designed part 37. It is preferable that the filter substrate 30 further include a color mixture prevention layer 40 formed between the light shielding matrix 38 and the design portion 37. The design part 37 defines a plurality of transmission parts 39 together with the color mixture prevention layer 40 and the light shielding matrix 38. In other words, the transmission portion 39 is a portion where the design portion 37, the color mixture prevention layer 40, and the light shielding matrix 38 are not formed. The transmissive part 39 forms the sub-pixel part SP. That is, in the example shown in FIGS. 4A and 4B, the transmission portion 39 is provided at a position where the sub-pixel portion SP is formed. On the other hand, in the example illustrated in FIG. 4C, the transmission unit 39 is provided at a position corresponding to the light emitting element 27 forming the sub-pixel unit SP, more specifically, at a position overlapping the light emitting element 27. Then, in the present embodiment, the filter substrate 30 is formed in the transmission part 39 forming each sub-pixel part SP, and further has a colored part 32 colored with the display color of the sub-pixel part SP. The coloring portion 32 includes, for example, a coloring portion 32R colored red, a coloring portion 32G colored green, and a coloring portion 32B colored blue. The light transmitted through the colored portion 32 forms an image. That is, the pixel region A1 is formed by the colored portion 32 (the transmissive portion 39), and the region other than the pixel region (the region in which the design portion 37, the color mixture prevention layer 40, and the light shielding matrix 38) are formed in the display region DA. The non-pixel area A2 is formed.

The design section 37 forms a design to be displayed in the display area DA, and gives the display device 10 a design property. In order to display a design, the design portion 37 includes a coloring agent such as a pigment or a dye. The colorant may be a colorant of any color, for example, a black pigment carbon black. Alternatively, the design portion 37 may be formed by superimposing layers of a plurality of colors for each color obtained by performing color separation on a design to be displayed. Each color layer is formed of, for example, a resin containing a colorant. Typically, the design part 37 includes red, green, blue, and black layers. However, in order to improve the designability of the design displayed by the design portion 37, the design portion 37 may include a layer other than these colors, for example, a yellow layer. The design part 37 may be formed by superimposing layers of each color of C (cyan), M (magenta), Y (yellow), and K (black). In this case, each color layer displays a color by a halftone dot. Here, if the halftone dots are regularly arranged, moiré due to interference between the regularity of the halftone dots and the regularity of the arrangement of the transmissive portions 39 can be observed. Therefore, the halftone dots of the colored layer are preferably arranged irregularly, and for example, it is preferably an FM screen.

As shown in FIGS. 4A to 4C, the design portion 37 is stacked over the entire area of the color mixture prevention layer 40 and the light shielding matrix 38 from the observer side, that is, the light emission side of the display panel 20. Therefore, the observer can observe the design formed by the design portion 37 without visually recognizing the color mixture prevention layer 40 and the light shielding matrix 38. The design portion 37 preferably has a sufficient thickness to clearly display the design to be formed. Specifically, the thickness of the design portion 37 is, for example, not less than 3 μm and not more than 50 μm.

In addition, from the viewpoint of clearly displaying the design, it is preferable that the design part 37 forming the design has a large difference in color between at least a part of the display area DA and a layer serving as a base of the design part 37. Specifically, in at least a part of the display area DA, the distance ΔE ^* ab in the color space of the L ^* a ^* b ^* color system of the design portion 37 and the layer serving as the base of the design portion 37 is 0.7 or more. Is preferable, it is more preferably 1.0 or more, and further preferably 1.5 or more. The layer serving as the base of the design portion 37 is a layer provided on the opposite side of the design portion 37 from the observer side. In the present embodiment, the color mixture prevention layer is provided when the color mixture prevention layer 40 is provided. 40, the light shielding matrix 38 when the color mixture prevention layer 40 is not provided. Here, the value of ΔE ^* ab in the L ^* a ^* b ^* color system is determined by, for example, using a spectrophotometer (“CM-700d” manufactured by Konica Minolta) to determine the design portion 37 and the base of the design portion 37. comprising respective ^{^L ^*} ^a * ^b * ^L * value in the color system of layers, ^{a *} value, ^{b *} value of can be determined by measuring respectively.

意 Further, the design formed by the design portion 37 is observed thinner by the transmission portion 39 which is a non-formed portion of the design portion 37 than the design formed without the transmission portion 39. That is, the design formed by the design portion 37 is thinned by the transmission portion 39. Therefore, when the design formed by the design portion 37 and the design of the outer frame portion 15 are formed in the same manner, a difference may occur in the density of the design. In order for the observer to observe the design formed in the display area DA with the same density as the design of the outer frame portion 15, it is preferable that the design portion 37 displays the design darker than the outer frame portion 15. . For example, the thickness of the design portion 37 is larger than the thickness of the member forming the design of the outer frame portion 15, and the density of the pigment included in the design portion 37 is higher than the density of the pigment included in the outer frame portion 15. And that the area ratio of the halftone dots forming the design in the design portion 37 is larger than the area ratio of the halftone dots forming the design in the outer frame portion 15. Accordingly, the design portion 37 can display the design more densely than the outer frame portion 15. However, the configuration for the design part 37 to display the design darker than the outer frame part 15 is not limited to these.

(4) The color mixture prevention layer 40 prevents the design of the design formed by the design portion 37 from being impaired by being mixed with the color of the light shielding matrix 38. Therefore, the color mixture prevention layer 40 has a color that does not easily impair the design of the design formed by the design portion 37. Typically, the color mixture prevention layer 40 is preferably white. However, the color mixture prevention layer 40 may be a color other than white as long as it does not impair the design of the design displayed in the design portion 37. Further, the color mixture prevention layer 40 may include a light reflection component. Since the color mixture prevention layer 40 includes a light reflection component, light transmitted through the design portion 37 is reflected by the color mixture prevention layer 40 and transmitted again through the design portion 37, so that the design by the design portion 37 becomes clearer. Can be observed. Examples of the light reflection component contained in the color mixture prevention layer 40 include a granular silver pigment and a scaly metal. The thickness of the color mixture prevention layer 40 is preferably 2 μm or more and 30 μm or less in order to prevent color mixture.

(4) The light-shielding matrix 38 partitions the transmitting portion 39 and prevents light from being emitted from portions other than the transmitting portion 39 constituting the sub-pixel portion SP. The light shielding matrix 38 has a function of absorbing light. The light shielding matrix 38 contains, for example, light absorbing particles in a binder resin. Examples of the light absorbing particles include black pigments such as carbon black and titanium black. The thickness of such a light shielding matrix 38 is preferably 0.5 μm or more and 30 μm or less so that light can be sufficiently absorbed.

The transmission portion 39 is a portion where the light shielding matrix 38, the color mixture prevention layer 40, and the design portion 37 are not formed, and is defined by the light shielding matrix 38, the color mixture prevention layer 40, and the design portion 37. The transmitting section 39 can form an image to be observed by an observer by transmitting light. It is preferable that the ratio occupied by the transmitting portion 39 of the filter substrate 30 in a plan view is higher, so that an observer can observe an image in an image display state of the display panel 20. Specifically, the ratio occupied by the transmission portion 39 in a plan view is preferably 3% or more, more preferably 10% or more, and even more preferably 20% or more. However, it is preferable that the proportion occupied by the design portion 37 of the filter substrate 30 in a plan view is high so that the observer can observe the design formed by the design portion 37 in the image non-display state of the display panel 20. That is, the ratio occupied by the transmission portion 39 of the filter substrate 30 in a plan view is preferably lower. Specifically, the proportion occupied by the transmitting portion 39 in a plan view is preferably 50% or less, more preferably 40% or less, and even more preferably 30% or less. The ratio occupied by the transmission portions 39 in a plan view can be adjusted by, for example, changing the area of each transmission portion 39 or changing the number of the transmission portions 39.

In addition, in order to arrange the pixels sufficiently fine, it is preferable that the sub-pixels SP formed by the transmissive portion 39 are arranged at sufficiently small intervals. That is, it is preferable that the interval between the transmission portions 39 is small. Specifically, the interval between the transmission portions 39 is preferably 300 μm or less, more preferably 200 μm or less, and further preferably 150 μm or less. However, it is preferable that the size of the design portion 37, that is, the distance between the adjacent transmission portions 39, be large so that the design formed by the design portion 37 is observed. For this reason, it is preferable that the interval between the transmission portions 39 is large. Specifically, the interval between the transmission portions 39 is preferably 5 μm or more, and more preferably 20 μm or more. Note that the interval between the transmission portions 39 means the shortest length between two adjacent transmission portions 39.

The contour of the transmitting portion 39 includes a circular arc or an elliptical arc in order to make the size of the design portion 37 sufficiently large so that the design formed by the design portion 37 is easily observed. Is preferred. In the illustrated example, the outline of the transmission portion 39 is an elliptical arc as a whole. However, the present invention is not limited to this, and the transmission section 39 can have an arbitrary shape such as a rectangle, a V-shape, and a W-shape. Further, the transmitting portion 39 is rectangular, V-shaped, W-shaped, or the like as a whole, and may include a circular arc or an elliptical arc at a part, particularly at a corner.

4A to 4C, the transmission portion 39 is provided as an opening extending while maintaining its size in the direction in which the light-blocking matrix 38, the color mixture prevention layer 40, and the design portion 37 are stacked. However, the transmission part 39 may be provided as an opening extending while changing its size in the direction in which the light shielding matrix 38, the color mixture prevention layer 40, and the design part 37 are stacked. That is, for example, the transmission section 39 may be provided in a tapered shape. Since the transmission section 39 is tapered, the viewing angle at which light transmitted through the transmission section 39 can be observed can be increased.

The design portion 37 and the transmission portion 39 are formed by irradiating light to a composition including a photoreactive material provided in a portion where the design portion 37 and the transmission portion 39 are formed, as described later. Can be. By irradiating light to a portion forming the design portion 37 or a portion forming the transmission portion 39, the design portion 37 and the transmission portion 39 are formed. When a material that reacts with light and polymerizes is used as the photoreactive material, the composition is reacted with light and polymerized by irradiating light to the portion forming the design portion 37, and thereafter, an etching process described later is performed. By performing the above, the portion of the composition that has not been polymerized without being irradiated with light is removed to form the transmission portion 39, and the remaining portion without being removed becomes the design portion 37. That is, the design part 37 is made of a cured product of a composition containing a photoreactive material. As such a photoreactive material, for example, a photocurable resin such as cyclized polyisoprene or cyclized polybutadiene can be used. On the other hand, when a material that reacts with light and decomposes is used as the photoreactive material, the composition is decomposed by reacting with light by irradiating light to the portion forming the transmission part 39, and then the etching described later By performing the above processing, the decomposed composition is removed, and the transmission portion 39 is formed. On the other hand, the composition containing the photoreactive material remains as the design part 37 in the part where the light is not irradiated. In other words, the design part 37 contains a photoreactive material. As such a photoreactive material, for example, a photodecomposable resin such as a phenolic resin compound can be used.

Furthermore, the filter substrate 30 is provided with other components as appropriate in order to function effectively as a substrate (opposite substrate) on the viewer side of the display panel. 4A and 4B, the first protective film 33, the transparent electrode layer 34, and the first alignment film 35 are formed on the colored portion 32 in this order toward the liquid crystal layer 25. . In the example shown in FIG. 4A, the first polarizing plate 36 is provided on the side of the first substrate 31 of the filter substrate 30 opposite to the liquid crystal layer 25, that is, on the viewer side of the first substrate 31 of the filter substrate 30. Are laminated. On the other hand, in the example shown in FIG. 4C, the protective film 33 and the transparent electrode layer 34 are formed on the colored portion 32 in this order toward the light emitting layer 26.

As shown in FIGS. 3 and 4A to 4C, the rear substrate 50 includes a second base material 51 having a light-transmitting property and a pixel electrode 52 disposed in the pixel region A1 on the second base material 51. And Further, a switching element 58 (see FIG. 3) for controlling application of a voltage to the pixel electrode 52 is provided separately for each pixel electrode 52 (sub-pixel unit SP). The switching element 58 can be formed, for example, as a thin film transistor (TFT). The switching element 58 operates based on the control of a control device (not shown). Various circuit wirings (not shown) such as scanning lines and signal lines (data lines) necessary for driving the switching elements 58 are formed on the second base member 51.

Furthermore, other components are appropriately provided on the rear substrate 50. For example, as shown in FIGS. 4A and 4B, the second protective film 53 and the second protective film 53 are formed on the pixel electrode 52 to effectively function as a substrate (element substrate, array substrate) on the surface light source device side of the liquid crystal display panel. The two alignment films 55 are formed in this order toward the liquid crystal layer 25 side. In the example illustrated in FIG. 4A, the second substrate 51 of the rear substrate 50 on the side opposite to the liquid crystal layer 25, that is, the second light source device side of the second substrate 51 of the rear substrate 50 has the second substrate. A polarizing plate 56 is laminated. On the other hand, in the example shown in FIG. 4C, only the second protective film 53 is provided on the pixel electrode 52.

The design displayed on the display panel 20 by the design part 37 and the design displayed on the outer frame part 15 are not limited to the above-described patterns, and may be glossy or polished by a diffusion layer.

Next, an example and another example of a method of manufacturing the filter substrate 30 according to the present embodiment will be described with reference to FIGS.

First, a method of obtaining the design portion 37, the color mixture prevention layer 40, and the light shielding matrix 38 patterned by etching will be described with reference to FIGS. As shown in FIG. 5, a design film 37a for forming the design portion 37 is provided on the first base material 31, and a color mixture prevention film 40a for forming the color mixture prevention layer 40 is provided on the design film 37a. A light shielding film 38a for forming the light shielding matrix 38 is provided on the color mixture prevention film 40a. The design film 37a, the color mixture prevention film 40a, and the light shielding film 38a can be formed by, for example, printing.

(6) Thereafter, as shown in FIG. 6, a resist pattern 60 is provided on the light shielding film 38a. The resist pattern 60 has a shape corresponding to the arrangement pattern of the design portion 37, the color mixture prevention layer 40, and the light shielding matrix 38 to be formed. The resist pattern 60 can be formed by, for example, patterning using a known photolithography technique.

Next, using the resist pattern 60 as a mask, the design film 37a, the color mixture prevention film 40a, and the light shielding film 38a are etched. By this etching, the design film 37a, the color mixture prevention film 40a, and the light shielding film 38a are patterned into a pattern substantially the same as the resist pattern 60. As a result, as shown in FIG. 7, the design portion 37 is formed from the patterned design film 37a. Further, the color mixture prevention layer 40 is formed from the patterned color mixture prevention film 40a. Similarly, a light shielding matrix 38 is formed from the patterned light shielding film 38a. Further, the portion from which the design film 37a, the color mixture prevention film 40a, and the light-shielding film 38a are removed by etching becomes the transmission portion 39 in which the design portion 37, the color mixture prevention layer 40, and the light-shielding matrix 38 are partitioned. That is, the light-shielding matrix 38, the color mixture prevention layer 40, and the design portion 37 are formed at the same time, and are non-formation portions of the light-shielding matrix 38, non-formation portions of the color mixture prevention layer 40, and non-formation portions of the design portion 37. A transmission section 39 is provided.

公知 Note that a known method can be used as the etching method. For example, the etching method may be wet etching using an etchant or the like, plasma etching, dry etching such as reactive ion sputtering, or sandblasting.

As another method, a method for obtaining the design portion 37, the color mixture prevention layer 40, and the light shielding matrix 38 patterned by photolithography will be described with reference to FIGS. First, as shown in FIG. 8, a design film 37a for forming the design portion 37 is provided on the first base material 31, and a photomask 61 is arranged on the design film 37a. The photomask 61 is provided using, for example, chrome or the like on a glass substrate, and has a shape corresponding to the arrangement pattern of the design portions 37 to be formed. In the example shown in FIG. 8, the design film 37a is made of a photoreactive material, particularly a photodegradable resin. Therefore, the photomask 61 is provided so that the formation part of the design part 37 is not exposed.

By irradiating the light, as shown in FIG. 9, the design film 37a, which is blocked by the photomask 61 and is not cured, remains without being decomposed, and the design portion 37 is formed. On the other hand, the design film 37a irradiated with light is made of an alkaline solution (potassium hydroxide, sodium hydroxide, sodium carbonate, sodium metasilicate, sodium phosphate, tetramethylammonium hydroxide, trimethyl-2-hydroxyethylammonium hydroxide). , Etc.) and developing.

Thereafter, the photomask 61 is once removed. Next, as shown in FIG. 10, a color mixture prevention film 40a for forming the color mixture prevention layer 40 is provided on the first base material 31 and the design portion 37, and the photomask 61 is again formed on the color mixture prevention film 40a. Deploy. The color mixture prevention film 40a is made of a photo-decomposable resin. At this time, the photomask 61 is provided so as to overlap the formed design part 37. The photomask 61 is arranged so as to overlap with the design portion 37, for example, by imaging the design portion 37 with a camera or the like so as to be aligned.

By irradiating the light, as shown in FIG. 11, the light-blocking film 40a, which is blocked by the photomask 61 and is not cured, remains without being decomposed and the light-mixing prevention layer 40 is formed. On the other hand, the color mixture prevention film 40a irradiated with the light is removed.

Thereafter, the photomask 61 is once removed. Next, as shown in FIG. 12, a light-shielding film 38a for forming the light-shielding matrix 38 is provided on the first base material 31 and the color mixture prevention layer 40, and the photomask 61 is disposed again on the light-shielding film 38a. . The light shielding film 38a is made of a photo-decomposable resin. At this time, the photomask 61 is aligned and arranged so as to overlap the formed design portion 37 and the color mixture prevention layer 40.

By irradiating the light, as shown in FIG. 13, the light shielding film 38a which is blocked by the photomask 61 and is not cured remains without being decomposed, and the light shielding matrix 38 is formed. On the other hand, the light shielding film 38a irradiated with light is removed. The transmission portion 39 is formed by the portion where the design film 37a, the color mixture prevention film 40a, and the light shielding film 38a are removed.

The design part 37 may be provided not by one exposure but by repeating the above-described steps a plurality of times for each design color to be displayed. That is, the formation of the film of each color to be exposed and the photomask 61 and the irradiation of light are repeatedly performed so as to form the layers of each color of, for example, red, green, blue, and black included in the design portion 37. You may. In this case, the photomask 61 has a shape corresponding to the position where each color layer is provided.

各 Each film of the photoreactive material to be exposed (the design film 37a, the color mixture prevention film 40a, and the light shielding film 38a) may be a photocurable resin instead of a photodegradable resin. In this case, the photomask 61 is arranged so that the non-formed portions of the design portion 37, the color mixture prevention layer 40, and the light shielding matrix 38 are not exposed.

The transmission part 39 is not limited to the above example, and the transmission part 39 may be formed by, for example, removing a part of the light shielding film 38a, the color mixture prevention film 40a, and the design film 37a shown in FIG.

The patterned design portion 37, the color mixture prevention layer 40, and the light shielding matrix 38 are obtained by the etching shown in FIGS. 5 to 7, or by the photolithography technique shown in FIGS. 8 to 13, or by another method. Can be Thereafter, as shown in FIG. 14, the resist pattern 60 and the photomask 61 are removed. In addition, since the resist pattern 60 is provided on the side facing the rear substrate 50, it is not visually recognized and thus does not need to be removed.

Then, as shown in FIG. 15, the colored portion 32 is formed in the transmitting portion 39. The coloring portions 32 can be sequentially formed for each coloring portion of each color by, for example, photolithography technology or inkjet printing.

Finally, as shown in FIG. 16, if necessary, a first polarizing plate 36 is formed on the side on which the first base material 31 is provided, and the first protective film 33, A transparent electrode layer 34 and a first alignment film 35 are sequentially formed. Through the above steps, the filter substrate 30 is manufactured.

Next, the operation of the display device 10 according to the present embodiment will be described.

(4) In a state where no image is displayed on the display surface 11 of the display device 10, the design formed by the design portion 37 of the filter substrate 30 is displayed on the display surface 11. That is, the display device 10 can display a design intended to be observed. By the displayed design, the display device 10 can be harmonized with the surrounding environment in the design.

On the other hand, in the example shown in FIGS. 4A and 4B, when an image is displayed on the display surface 11 of the display device 10, the lights L1, L2, L3, and L4 emitted by the surface light source device 13 are inside the display panel 20. move on. Then, the switching element 58 is driven by a signal from a control device (not shown), and the light emitted from the surface light source device 13 is formed in the transmission section 39 while adjusting the transmittance, thereby forming each sub-pixel section SP. The light passes through the

colored portions

32R, 32G, and 32B. The light L1 shown in FIG. 4A and the light L3 shown in FIG. 4B are transmitted through the colored portion 32R. Light that passes through the

coloring sections

32R, 32G, and 32B and exits from the display panel 20 forms an image as image light. The display device 10 can display an image intended to be observed on the display surface 11, and an external observer can observe the image.

The design part 37 is covered by the light shielding matrix 38 from the surface light source device 13 side. Therefore, like the light L2 shown in FIG. 4A and the light L4 shown in FIG. 4B, the light is prevented from being incident on the design portion 37 by the light shielding matrix 38. For this reason, it is possible to prevent the light transmitted through the design portion 37 and the mixture of the design represented by the design portion 37 and the image light transmitted through each of the

colored portions

32R, 32G, and 32B from being observed. . That is, it is possible to effectively prevent the color reproducibility of an image from deteriorating due to absorption of visible light in a specific wavelength region by the design part 37.

In the example shown in FIG. 4C, an image is displayed on the display surface 11 of the display device 10. When the switching element 58 is driven by a signal from a control device (not shown), the light emitting element 27 emits light. The light L5 emitted by the light emitting element 27 travels in the display panel 20 and passes through the

coloring sections

32R, 32G, and 32B formed in the transmission section 39 and constituting the sub-pixel sections SP. The light L5 shown in FIG. 4C is transmitted through the colored portion 32R. Light that passes through the

coloring sections

32R, 32G, and 32B and exits from the display panel 20 forms an image as image light. In this manner, the display device 10 can display an image intended to be observed on the display surface 11, and an external observer can observe the image.

By the way, as described above, in the conventional display device 110 as shown in FIG. 17, the decorative sheet 130 is provided at a position facing the display surface 111 of the display device 110 in order to provide designability. Such a decorative sheet 130 was provided as a component independent of the display panel. Therefore, it is necessary to separately perform a process related to the decorative sheet 130, specifically, a process of printing the decorative sheet 130 to provide the transmission portion 139 and a process of disposing the decorative sheet 130 on the front surface of the display device 110. . Such steps increase the cost of manufacturing the display device 110. Furthermore, the provision of the decorative sheet 130 increases the number of components of the display device, complicates the structure, and makes the display device 110 difficult to handle.

On the other hand, in the filter substrate 30 of the display device 10 according to the present embodiment, the design part 37 for providing design properties is laminated on the light shielding matrix 38. Since the filter substrate 30 has the light shielding matrix 38, the design part 37 can be provided in the display device 10 as a component of the filter substrate 30. Further, the design part 37 can be provided on the display panel 20 at the same time as the light shielding matrix 38. In other words, it is possible to omit the step of providing a member having the design portion 37 for providing design properties separately from the display panel 20. Furthermore, since the design part 37 which gives design nature is laminated on the light shielding matrix 38, the structure of the display device 10 can be simplified.

Further, in the display device 110 provided with the conventional decorative sheet 130 as shown in FIG. 17, the decorative sheet 130 is provided so as to face the display surface 111 of the display device 110. 131 and a display surface 111 for displaying an image are different surfaces. If this is recognized by the observer of the display device with the decorative sheet, the observer will feel uncomfortable. On the other hand, in the display device 10 according to the present embodiment, the filter substrate 30 has the design portion 37 for providing designability. For this reason, the surface of the display device 10 and the display surface on which an image is displayed can be the same surface. Therefore, the observer of the display device 10 can observe the image without feeling uncomfortable.

FIG. 18 is an enlarged view of the surface of the display device 110 provided with the conventional decorative sheet 130. As shown in FIG. 18, in the display device 110 provided with the conventional decorative sheet 130, the image light emitted from the display device 110 is observed through the transmission part 139 of the decorative sheet 130. Therefore, the transmissive portion 139 overlaps the sub-pixel portion SP of the display device 110 and the light-blocking matrix 138 that partitions the sub-pixel portion SP. For this reason, moire may be observed due to the periodicity in which the transmissive portion 139 is provided and the periodicity of the sub-pixel portion SP and the light-shielding matrix 138. On the other hand, in the filter substrate 30 of the present embodiment, the light-transmitting portion 39 constituting the sub-pixel portion SP is partitioned by the design portion 37 together with the light-shielding matrix 38. The periodicity of the light transmitting matrix 39 and the periodicity of the light shielding matrix 38 coincide with each other, and therefore, moire due to these periodicities is not observed.

If the light-shielding matrix 138 overlaps with the transmissive part 139, no light is emitted from the light-shielding matrix 138, so that no image light is emitted from the entire area of the transmissive part 139. For this reason, the luminance of the observed image light is unintentionally reduced. On the other hand, in the filter substrate 30 of the present embodiment, the transmission section 39 does not overlap with the light shielding matrix 38, and the image light is emitted from the entire area of the transmission section 39. Therefore, the brightness of the image light does not unintentionally decrease.

Furthermore, the transmissive portion 139 may overlap any one of the sub-pixel portions SP in an area larger than the other sub-pixel portions SP. In this case, in the transmissive portion 139, the image light is converted from light (for example, green light) of the sub-pixel portion SP overlapping in a larger area to light (for example, red light and blue light) of another sub-pixel portion SP. More will be transmitted. That is, in the display device 110 provided with the conventional decorative sheet 130, the color reproducibility of the image to be displayed is reduced. On the other hand, in the filter substrate 30 of the present embodiment, since the sub-pixel unit SP is configured by the transmission unit 39, only a part of the light from the sub-pixel unit SP does not pass through the transmission unit 39. Therefore, the color reproducibility of the image to be displayed does not decrease.

In addition, in the filter substrate 30 of the present embodiment, the outline of the transmission section 39 includes a circular arc or an elliptical arc. When the outline of the transmissive portion 39 includes an arc or an elliptical arc, compared to the case where the outline of the transmissive portion 39 is a rectangle or the like that does not include the arc or the elliptical arc, when the size of each transmissive portion 39 is the same, 37, in other words, the distance between the adjacent transmission portions 39 can be increased. Therefore, each part of the design formed by the design part 37 is easily recognized, and the entire design is easily observed.

Further, in filter substrate 30 of the present embodiment, the interval between transmission portions 39 is not less than 50 μm and not more than 300 μm. That is, the sub-pixels SP formed by the transmissive portions 39 can be arranged at sufficiently small intervals, and the size of the design portion 37, that is, the distance between adjacent transmissive portions 39 can be sufficiently increased. For this reason, it is possible to achieve both sufficiently arranging the pixels and making it easy to recognize each part of the design formed by the design part 37.

In addition, in the filter substrate 30 of the present embodiment, the ratio occupied by the transmission portion 39 in a plan view is 3% or more and 50% or less. In this case, the light from the surface light source device 13 can be sufficiently transmitted so that the image can be easily observed in the image display state, and the ratio of the design portion 37 can be increased to allow the design to be observed in the image non-display state. It is possible to achieve both easy and easy.

フィルタ Furthermore, the filter substrate 30 of the present embodiment further includes a color mixture prevention layer 40 formed between the light shielding matrix 38 and the design portion 37. According to the color mixture prevention layer 40, it is possible to prevent the design of the design formed by the design portion 37 from being impaired by being mixed with the color of the light shielding matrix 38. Therefore, the filter substrate 30 can display the design by the design part 37 more clearly.

The display panel 20 of the present embodiment includes the filter substrate 30 and the liquid crystal layer 25 disposed on the back side of the filter substrate 30, that is, on the side of the light-shielding matrix 38, and driven by the GH method, or each transmission portion 39. A light-emitting layer (organic EL layer) 26 having a light-emitting element (organic EL light-emitting element) 27 provided at a corresponding position. In this case, as shown in FIGS. 4B and 4C, the display panel 20 may not include a polarizing plate. When the display panel 20 includes a polarizing plate, the polarizing plate is provided, for example, on the side where light is emitted from the design portion 37, that is, on the observer side with respect to the design portion 37, as shown in FIG. 4A. The design by the design part 37 is displayed as reflected light of external light reflected by the design part 37. If a polarizing plate is provided on the viewer side of the design portion 37, a part of the light reflected by the design portion 37 will be absorbed by the polarizing plate. That is, the design by the design part 37 is displayed indistinctly. On the other hand, if the display panel does not include a polarizing plate, the light reflected by the design portion 37 is displayed as a design without being absorbed. Therefore, when the display panel 20 has the liquid crystal layer 25 driven by the GH method or the light emitting layer 26 having the light emitting element 27 provided at a position corresponding to each transmission part 39, the design by the design part 37 is changed. It can be displayed more clearly.

As described above, the filter substrate 30 according to the present embodiment includes the light-shielding matrix 38 that partitions the plurality of transmissive portions 39 and the design portion 37 that forms the design. A design part 37 for partitioning the plurality of transmission parts 39. According to such a filter substrate 30, the design part 37 can be provided in the display device 10 as one component of the filter substrate 30. This eliminates the cost of separately manufacturing the design portion 37 and the cost of separately arranging the design portion 37 on the display device 10, and the design device 37 is laminated on the light-shielding matrix 38. Can be simplified. That is, it is possible to provide the display device 10 with designability with a low-cost and simple configuration.

The aspects of the present invention are not limited to the above-described embodiments, but include various modifications that can be conceived by those skilled in the art, and the effects of the present invention are not limited to the above-described contents. That is, various additions, changes, and partial deletions can be made without departing from the concept and spirit of the present invention derived from the contents defined in the claims and equivalents thereof.

In the above-described embodiment, an organic EL display device is shown as a display device that does not include a polarizing plate. However, the display device not including the polarizing plate is not limited to the organic EL display device, but may be a micro LED display device or a quantum dot display device. The display device 10 as a micro LED display device or a quantum dot display device has a display panel 20 as a micro LED display panel or a quantum dot display panel, and an outer frame portion 15 surrounding the display panel 20. The display panel 20 has a filter substrate 30 similar to that of the above-described embodiment, and a micro LED layer and a quantum dot layer as the light emitting layer 26. The micro LED layer has, as the light emitting element 27, a plurality of micro LED light emitting elements provided at positions corresponding to the transmission portions 39. The quantum dot layer includes a plurality of quantum dot light emitting elements provided at positions corresponding to the transmission sections 39 as the light emitting elements 27. An image can be displayed on the display surface 11 by selectively emitting light from the micro LED light emitting element or the quantum dot light emitting element as the light emitting element 27.

Even when the display device is a micro LED display device or a quantum dot display device, since the display panel 20 does not include a polarizing plate, light reflected by the design portion 37 is displayed as a design without being absorbed. . Therefore, the design by the design part 37 can be displayed more clearly.

The filter substrate 30 may include a light emitting unit 42 including quantum dots formed in the transmission unit 39 instead of the coloring unit 32 in the above-described embodiment. Such a light emitting section 42 emits light of a specific wavelength when light enters. The light emitting unit 42 includes, for example, a light emitting unit 42R that emits red light, a light emitting unit 42G that emits green light, and a light emitting unit 42B that emits blue light. By controlling the light incident on each light emitting unit 42, an image can be formed by the light emitted by the light emitting unit 42.

When the filter substrate 30 has the light emitting portion 42 including the quantum dot, the filter substrate 30 in the display device 10 as the liquid crystal display device includes the first polarizing plate 36 as shown in FIG. It is stacked on the liquid crystal layer 25 side with respect to 42. Since the polarizing plate is not included on the viewer side than the design part 37, the light reflected by the design part 37 is displayed as a design without being absorbed. Therefore, the design by the design part 37 can be displayed more clearly.

Reference Signs List 10 display device 11 display surface 13 surface light source device 15 outer frame 16 opening 20 display panel 25 liquid crystal layer 26 light emitting layer 27 light emitting element 30 filter substrate 31 first base material 32 coloring portion 33 first protective film 34 transparent electrode layer 35 First alignment film 36 First polarizing plate 37 Design part 38 Light shielding matrix 39 Transmission part 40 Color mixture prevention layer 50 Backside substrate 51 Second base material 52 Pixel electrode 53 Second protective film 55 Second alignment film 56 Second polarizing plate 58 Switching element 60 Resist pattern 61 Photo mask

Claims

A light-blocking matrix that partitions a plurality of transmissive sections;
A filter substrate, comprising: a design part for forming a design, the design part being stacked on the light shielding matrix and dividing the plurality of transmission parts together with the light shielding matrix.
The filter substrate according to claim 1, wherein the outline of the transmission portion includes a circular arc or an elliptical arc.
The filter substrate according to claim 1 or 2, wherein an interval between the transmission portions is equal to or greater than 50 μm and equal to or less than 300 μm.
4. The filter substrate according to claim 1, wherein a ratio occupied by the transmission portion in a plan view is 3% or more and 50% or less. 5.
The filter substrate according to any one of claims 1 to 4, further comprising a color mixture prevention layer formed between the light shielding matrix and the design portion.
The filter substrate according to any one of claims 1 to 5, further comprising a coloring portion formed in the transmission portion.
6. The filter substrate according to claim 1, further comprising a light emitting unit including a quantum dot formed in the transmission unit. 7.
The filter substrate according to any one of claims 1 to 7, wherein the design part is made of a cured product of a composition containing a photoreactive material.
The filter substrate according to any one of claims 1 to 7, wherein the design portion includes a photoreactive material.
The filter substrate according to any one of claims 1 to 9, wherein the design part forms a design of a picture composed of a combination of two or more colors.
The filter substrate according to any one of claims 1 to 10, wherein the design portion forms a design of a picture formed by halftone dots.
A filter substrate according to any one of claims 1 to 11,
A display panel, comprising: a liquid crystal layer that is arranged on the light-shielding matrix side of the filter substrate and is driven by a GH method; or a light-emitting layer having a light-emitting element provided at a position corresponding to each transmission unit.
The display panel according to claim 12, wherein the light emitting element is an organic EL light emitting element, a micro LED light emitting element, or a quantum dot light emitting element.
A display device comprising the filter substrate according to any one of claims 1 to 11, or the display panel according to claim 12 or 13.
Further comprising an outer frame portion surrounding the filter substrate,
The display device according to claim 14, wherein the design portion displays the design darker than the outer frame portion.