Display device and manufacturing method thereof

Abstract

A display device capable of improving efficiency and a manufacturing method thereof are provided. [Solution] According to an embodiment, a display device includes a light source including an optical element, a filter element, and a liquid crystal layer. The liquid crystal layer is located between the optical element and the filter element. The filter element includes first and second color filters and a first optical layer. The first optical layer is located between the liquid crystal layer and the first color filter. A second absorptance of the first color filter at a second wavelength is higher than a first absorptance of the first color filter at a first wavelength. A third absorptance of the second color filter at a first wavelength is higher than a fourth absorptance of the second color filter at the second wavelength. A second reflectance of the first optical layer at a second wavelength is higher than a first reflectance of the first optical layer at a first wavelength.

Description

[Technical Field]

[0001] FIELD An embodiment of the present invention relates to a display device and a manufacturing method thereof. [Background technology]

[0002] In display devices using liquid crystals and the like, improvement in efficiency is desired. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-64899 Summary of the Invention [Problem to be solved by the invention]

[0004] The embodiments provide a display device and a manufacturing method thereof that can improve efficiency. [Means for solving the problem]

[0005] According to an embodiment, a display device includes a light source including an optical element, a filter element, and a liquid crystal layer. The liquid crystal layer is located between the optical element and the filter element in a first direction. The filter element includes a first color filter, a second color filter, and a first optical layer. A second direction from the first color filter to the second color filter intersects with the first direction. The first optical layer is located between the liquid crystal layer and the first color filter in the first direction. A second absorptance of the first color filter at a second wavelength is higher than a first absorptance of the first color filter at a first wavelength. The first wavelength is different from the second wavelength. A third absorptance of the second color filter at the first wavelength is higher than a fourth absorptance of the second color filter at the second wavelength. A second reflectance of the first optical layer at the second wavelength is higher than a first reflectance of the first optical layer at the first wavelength. [Effects of the Invention]

[0006] The embodiments provide a display device capable of improving efficiency and a manufacturing method thereof. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic cross-sectional view illustrating the display device according to the first embodiment. [Figure 2] FIG. 2 is a schematic view illustrating the display device according to the first embodiment. [Figure 3] FIG. 3 is a schematic view illustrating the display device according to the first embodiment. [Figure 4] FIG. 4 is a schematic view illustrating the display device according to the first embodiment. [Figure 5] FIG. 5 is a schematic cross-sectional view illustrating the display device according to the first embodiment. [Figure 6] FIG. 6 is a schematic view illustrating the display device according to the first embodiment. [Figure 7] FIG. 7 is a schematic cross-sectional view illustrating the display device according to the first embodiment. [Figure 8] FIG. 8 is a schematic view illustrating the display device according to the first embodiment. [Figure 9] FIG. 9 is a schematic cross-sectional view illustrating the display device according to the first embodiment. [Figure 10] FIG. 10 is a schematic view illustrating the display device according to the first embodiment. [Figure 11] FIG. 11 is a schematic view illustrating the display device according to the first embodiment. [Figure 12] FIG. 12 is a schematic view illustrating the display device according to the first embodiment. [Figure 13] FIG. 13 is a schematic cross-sectional view illustrating the display device according to the first embodiment. [Figure 14] FIG. 14 is a schematic view illustrating the display device according to the first embodiment. [Figure 15] FIG. 15 is a schematic view illustrating the display device according to the first embodiment. [Figure 16] FIG. 16 is a schematic view illustrating the display device according to the first embodiment. [Figure 17] FIG. 17 is a schematic perspective view illustrating a part of the display device according to the first embodiment. [Figure 18A] FIG. 18A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 18B] FIG. 18B is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 18C] FIG. 18C is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 18D] FIG. 18D is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 19A] FIG. 19A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 19B] FIG. 19B is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 19C] FIG. 19C is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 20A] FIG. 20A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 20B] FIG. 20B is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 20C] FIG. 20C is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 21A] FIG. 21A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 21B] FIG. 21B is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 21C] FIG. 21C is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 22A]FIG. 22A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 22B] FIG. 22B is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 22C] FIG. 22C is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 23A] FIG. 23A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 23B] FIG. 23B is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 24A] FIG. 24A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 24B] FIG. 24B is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 24C] FIG. 24C is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 24D] FIG. 24D is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 25A] FIG. 25A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 25B] FIG. 25B is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 25C] FIG. 25C is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 26A] FIG. 26A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 26B] FIG. 26B is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 26C] FIG. 26C is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 27A]FIG. 27A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 27B] FIG. 27B is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 27C] FIG. 27C is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 28A] FIG. 28A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 28B] FIG. 28B is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 28C] FIG. 28C is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 28D] FIG. 28D is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 29A] FIG. 29A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 29B] FIG. 29B is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 29C] FIG. 29C is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 29D] FIG. 29D is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 30A] FIG. 30A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 30B] FIG. 30B is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 30C] FIG. 30C is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 31A] FIG. 31A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 31B]FIG. 31B is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 31C] FIG. 31C is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 32A] FIG. 32A is a schematic cross-sectional view illustrating a method for manufacturing the display device according to the second embodiment. [Figure 32B] FIG. 32B is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. [Figure 32C] FIG. 32C is a schematic cross-sectional view illustrating the method for manufacturing the display device according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings are schematic or conceptual, and the relationship between the thickness and width of each part, the size ratio between parts, etc. are not necessarily the same as those in reality. Even when the same part is shown, the dimensions and ratios may be different depending on the drawing. In this specification and in each drawing, elements similar to those previously described with reference to the previous drawings are designated by the same reference numerals, and detailed descriptions thereof will be omitted where appropriate.

[0009] (First embodiment) FIG. 1 is a schematic cross-sectional view illustrating the display device according to the first embodiment. FIG. 2 is a schematic view illustrating the display device according to the first embodiment. As shown in FIG. 1, a display device 110 according to the embodiment includes a light source 50, a filter member 30, and a liquid crystal layer 15.

[0010] The light source 50 includes an optical member 51. In the example of FIG. 1 , the light source 50 may include a light emitting unit 52. The optical member 51 is located between the light emitting unit 52 and the liquid crystal layer 15. The light emitting unit 52 may include, for example, a light emitting element. The light emitting unit 52 may include, for example, a light guide plate and a diffusion plate. Light emitted from the light emitting unit 52 passes through the optical member 51 and enters the liquid crystal layer 15. The optical member 51 may control the distribution of the light's traveling direction, etc.

[0011] The liquid crystal layer 15 is located between the optical member 51 and the filter member 30 in the first direction D1. The first direction D1 is defined as the Z-axis direction. A direction perpendicular to the Z-axis direction is defined as the X-axis direction. A direction perpendicular to the Z-axis direction and the X-axis direction is defined as the Y-axis direction. The optical member 51, the liquid crystal layer 15, and the filter member 30 are aligned along the XY plane.

[0012] The filter member 30 includes a first color filter 31, a second color filter 32, and a first optical layer 41. A second direction D2 from the first color filter 31 to the second color filter 32 intersects with the first direction D1. The second direction D2 may be, for example, the X-axis direction. The first optical layer 41 is located between the liquid crystal layer 15 and the first color filter 31 in the first direction D1.

[0013] 1, the filter member 30 may further include a third color filter 33. The direction from the first color filter 31 to the third color filter 33 intersects the first direction D1. The direction from the first color filter 31 to the third color filter 33 may be along a second direction D2. The direction from the first color filter 31 to the third color filter 33 may be along a third direction D3. The third direction D3 intersects a plane including the first direction D1 and the second direction D2.

[0014] The filter member 30 may further include a third optical layer 43. The third optical layer 43 is provided between the liquid crystal layer 15 and the third color filter 33 in the first direction D1. As will be described later, in another example, the filter member 30 may further include another optical layer (for example, a second optical layer 42 described later).

[0015] In the example shown in Fig. 1, the orientation of the liquid crystal contained in the liquid crystal layer 15 is controlled by a voltage applied to the liquid crystal layer 15. The optical properties of the liquid crystal layer 15 change based on the change in orientation, thereby controlling the intensity (transmittance) of light. The optical properties may include, for example, at least one selected from the group consisting of optical rotation, birefringence, scattering, and absorption. The change in the optical properties may be converted into a change in transmittance (or absorptance) using a polarizing layer.

[0016] In the embodiment, the first color filter 31, the second color filter 32, and the third color filter 33 are, for example, light-absorbing color filters. The provision of these three types of color filters results in color display. Each of the first color filter 31, the second color filter 32, and the third color filter 33 corresponds to one pixel. The first optical layer 41 and the third optical layer 43 may be selectively reflective layers. The optical layer may include, for example, a plurality of particles. The optical layer may have, for example, a substantially periodic structure. The optical layer is configured to reflect light of a desired wavelength and transmit light of other wavelengths.

[0017] 2 illustrates the characteristics of the first color filter 31, the second color filter 32, the third color filter 33, the first optical layer 41, and the third optical layer 43. In FIG. 2, the horizontal axis represents wavelength λ. The vertical axis of the diagram relating to the first color filter 31, the second color filter 32, and the third color filter 33 represents light absorptance Ab0. The vertical axis of the diagram relating to the first optical layer 41 and the third optical layer 43 represents reflectance Rf0.

[0018] 2, the second absorptance Ab2 of the first color filter 31 at the second wavelength λ2 is higher than the first absorptance Ab1 of the first color filter 31 at the first wavelength λ1. The first wavelength λ1 is different from the second wavelength λ2. The third absorptance Ab3 of the second color filter 32 at the first wavelength λ1 is higher than the fourth absorptance Ab4 of the second color filter 32 at the second wavelength λ2.

[0019] The second reflectance Rf2 of the first optical layer 41 at the second wavelength λ2 is higher than the first reflectance Rf1 at the first wavelength λ1 of the first optical layer 41. The optical member 51 is configured to reflect light reflected by the first optical layer 41, for example.

[0020] This configuration achieves high efficiency. For example, light of the first wavelength λ1 that has passed through the optical member 51 passes through the first optical layer 41 and is incident on the first color filter 31. This light is modulated by the liquid crystal layer 15 and contributes to display.

[0021] On the other hand, the light of the second wavelength λ2 that has passed through the optical member 51 is reflected by the first optical layer 41 and travels toward other pixels. The other pixels may be pixels of the second color filter 32 and pixels of the third color filter 33. A portion of the light of the second wavelength λ2 that has been reflected by the first optical layer 41 is incident on the pixels of the second color filter 32 and contributes to display.

[0022] The present invention can suppress loss due to absorption in an absorption-type color filter. The light is effectively utilized. For example, a bright display can be obtained. For example, power consumption can be reduced. A display device capable of improving efficiency can be provided.

[0023] As already described, the filter member 30 may further include a third color filter 33 and a third optical layer 43. The third optical layer 43 is provided between the optical member 51 and the third color filter 33 in the first direction D1. The direction from the first color filter 31 to the third color filter 33 intersects with the first direction D1. The direction from the first color filter 31 to the third color filter 33 may be along the second direction D2.

[0024] 2, the fifth absorptance Ab5 of the first color filter 31 at the third wavelength λ3 is higher than the first absorptance Ab1. The third wavelength λ3 is different from the first wavelength λ1 and the second wavelength λ2. The sixth absorptance Ab6 of the second color filter 32 at the third wavelength λ3 is higher than the fourth absorptance Ab4 at the second wavelength λ2.

[0025] As shown in Figure 2, the seventh absorptance Ab7 of the third color filter 33 at the first wavelength λ1 and the eighth absorptance Ab8 of the third color filter 33 at the second wavelength λ2 are each higher than the ninth absorptance Ab9 of the third color filter 33 at the third wavelength λ3.

[0026] 2, the second reflectance Rf2 of the first optical layer 41 at the second wavelength λ2 is higher than the third reflectance Rf3 of the first optical layer 41 at the third wavelength λ3. The fifth reflectance Rf5 of the third optical layer 43 at the second wavelength λ2 is higher than the fourth reflectance Rf4 of the third optical layer 43 at the first wavelength λ1. The fifth reflectance Rf5 is higher than the sixth reflectance Rf6 of the third optical layer 43 at the third wavelength λ3. For example, the optical member 51 may be configured to further reflect light reflected by the third optical layer 43.

[0027] For example, light of the second wavelength λ2 that is incident on the third optical layer 43 is reflected by the third optical layer 43, and further reflected by the optical member 51, and can then be incident on another pixel. High efficiency can be obtained.

[0028] 1, the optical properties of the third optical layer 43 may be substantially the same as the optical properties of the first optical layer 41. The third optical layer 43 may be continuous with the first optical layer 41.

[0029] An optical layer (e.g., a reflective layer) corresponding to the second color filter 32 may not be provided. For example, as shown in FIG. 1 , the filter member 30 may further include a non-colored layer 35. The first optical layer 41 is located between a portion of the non-colored layer 35 and the first color filter 31. The second color filter 32 may be in contact with the non-colored layer 35 in the first direction D1. The third optical layer 43 may be located between another portion of the non-colored layer 35 and the third color filter 33. The non-colored layer 35 may include, for example, a resin (such as an acrylic resin).

[0030] In the example of Figure 2, the first wavelength λ1 is longer than the second wavelength λ2. The third wavelength λ3 is between the second wavelength λ2 and the first wavelength λ1. For example, the first color filter 31 is red. For example, the second color filter 32 is blue. For example, the third color filter 33 is green.

[0031] In this embodiment, the first optical layer 41 is located between the liquid crystal layer 15 and the first color filter 31. In the display device 110, external light is incident on the first color filter 31, the second color filter 32, and the third color filter 33 and is easily absorbed by these color filters. This suppresses reflection of external light and provides an easy-to-view display.

[0032] 3 and 4 are schematic views illustrating the display device according to the first embodiment. In these figures, the horizontal axis represents wavelength λ. The vertical axis of the figures relating to the first color filter 31, the second color filter 32, and the third color filter 33 represents light absorptance Ab0. The vertical axis of the figures relating to the first optical layer 41 and the third optical layer 43 represents reflectance Rf0.

[0033] In the display device 110a illustrated in FIG. 3, the first wavelength λ1 is longer than the third wavelength λ3. The second wavelength λ2 is between the third wavelength λ3 and the first wavelength λ1. For example, the first color filter 31 is red. For example, the second color filter 32 is green. For example, the third color filter 33 is blue.

[0034] In the display device 110b illustrated in FIG. 4, the second wavelength λ2 is longer than the first wavelength λ1. The third wavelength λ3 is between the first wavelength λ1 and the second wavelength λ2. For example, the first color filter 31 is blue. For example, the second color filter 32 is red. For example, the third color filter 33 is green. In the display devices 110a and 110b, light is also used effectively. A display device capable of improving efficiency is provided.

[0035] The display device 110a may have a configuration similar to that of the display device 110, except for the characteristics illustrated in Figure 3. The display device 110b may have a configuration similar to that of the display device 110, except for the characteristics illustrated in Figure 4.

[0036] As shown in FIG. 1, the display device 110 may include a first substrate 24a. The first substrate 24a is located between the optical member 51 and the liquid crystal layer 15. The filter member 30 includes a second substrate 24b. A first color filter 31, a second color filter 32, a third color filter 33, a first optical layer 41, and a third optical layer 43 are fixed to and supported by the second substrate 24b. A liquid crystal layer 15 is provided between the first substrate 24a and the second substrate 24b. The first color filter 31, the second color filter 32, the third color filter 33, the first optical layer 41, and the third optical layer 43 are provided between the liquid crystal layer 15 and the second substrate 24b.

[0037] 1, the filter member 30 includes a non-colored layer 35. The non-colored layer 35 may be provided between the liquid crystal layer 15 and the first optical layer 41, between the liquid crystal layer 15 and the third optical layer 43, and between the liquid crystal layer 15 and the second color filter 32. The non-colored layer 35 is, for example, an overcoat layer. For example, by providing an overcoat layer, good flatness can be obtained, for example.

[0038] The display device 110 may further include a first polarizing layer 25a and a second polarizing layer 25b. The first polarizing layer 25a is provided between the optical member 51 and the first substrate 24a. The second substrate 24b is provided between the first color filter 31 and the second polarizing layer 25b, between the second color filter 32 and the second polarizing layer 25b, and between the third color filter 33 and the second polarizing layer 25b.

[0039] The filter member 30 may further include a light-attenuating layer 36. The light-attenuating layer 36 is provided, for example, in an area including an area between one of the plurality of color filters and another of the plurality of color filters. Another of the plurality of color filters is adjacent to one of the plurality of color filters. The light-attenuating layer 36 is, for example, a black matrix. The light-attenuating layer 36 may include, for example, at least one selected from the group consisting of a metal, a metal compound, and a resin. The resin may include at least one selected from the group consisting of carbon, a pigment, and a dye.

[0040] As shown in FIG. 1, the display device 110 may further include spacers 17. In this example, the spacers 17 are provided between the first substrate 24a and the non-colored layer 35. The spacers 17 control the thickness (length along the first direction D1) of the liquid crystal layer 15. The spacers 17 may include a resin. The spacers 17 may be fixed to at least one of the first substrate 24a and the second substrate 24b.

[0041] In the example shown in FIG. 1, a first electrode 16a and a second electrode 16b are provided on the first substrate 24a. The orientation of the liquid crystal is controlled by the voltage applied to these electrodes. Any display mode can be used in the liquid crystal layer 15. The display mode may include, for example, TN mode, VA mode, or IPS mode. A polarizing layer can be introduced depending on the display mode. The polarizing layer is provided as necessary, or may be omitted. In an embodiment, one of the two electrodes may be provided on the first substrate 24a, and the other of the two electrodes may be provided on the second substrate 24b. At least one of these electrodes may be light-transmitting or light-blocking.

[0042] A plurality of switching elements may be provided on either the first substrate 24a or the second substrate 24b. The plurality of switching elements may include, for example, three-terminal elements such as thin film transistors. The plurality of switching elements may include, for example, two-terminal elements. At least one of the first substrate 24a and the second substrate 24b may include glass or resin.

[0043] FIG. 5 is a schematic cross-sectional view illustrating the display device according to the first embodiment. FIG. 6 is a schematic view illustrating the display device according to the first embodiment. 5, in the display device 111, the filter member 30 further includes a second optical layer 42. The configuration of the display device 111 other than this may be the same as the configuration of the display device 110, the display device 110a, or the display device 110b.

[0044] In the filter member 30, the second optical layer 42 is located between the liquid crystal layer 15 and the second color filter 32 in the first direction D1. The second optical layer 42 is located between the non-colored layer 35 and the second color filter 32.

[0045] 6, the reflectance (seventh reflectance Rf7) of the second optical layer 42 at the first wavelength λ1 is higher than the reflectance (eighth reflectance Rf8) of the second optical layer 42 at the second wavelength λ2. The optical member 51 is configured to reflect light reflected by the second optical layer 42. In the display device 111, light is effectively utilized. A display device capable of improving efficiency is provided.

[0046] As shown in FIG. 6, the reflectance (ninth reflectance Rf9) of the second optical layer 42 at the third wavelength λ3 may be higher than the reflectance (eighth reflectance Rf8) of the second optical layer 42 at the second wavelength λ2.

[0047] 6, the first wavelength λ1 is longer than the second wavelength λ2, and the third wavelength λ3 is between the second wavelength λ2 and the first wavelength λ1.

[0048] In the configuration of the display device 111, the first wavelength λ1 may be longer than the third wavelength λ3, and the second wavelength λ2 may be between the third wavelength λ3 and the first wavelength λ1. In the configuration of the display device 111, the second wavelength λ2 may be longer than the first wavelength λ1, and the third wavelength λ3 may be between the first wavelength λ1 and the second wavelength λ2.

[0049] FIG. 7 is a schematic cross-sectional view illustrating the display device according to the first embodiment. FIG. 8 is a schematic view illustrating the display device according to the first embodiment. 7, in the display device 120, the filter member 30 has an optical layer provided for each of three types of color filters. Except for this, the configuration of the display device 120 may be the same as the configuration of the display device 110, the display device 110a, or the display device 110b.

[0050] In the display device 120, the filter member 30 includes a first color filter 31, a second color filter 32, a third color filter 33, a first optical layer 41, a second optical layer 42, and a third optical layer 43. A second direction D2 from the first color filter 31 to the second color filter 32 intersects with the first direction D1. A direction from the first color filter 31 to the third color filter 33 intersects with the first direction D1. The direction from the first color filter 31 to the third color filter 33 may be along the second direction D2.

[0051] The first optical layer 41 is provided between the liquid crystal layer 15 and the first color filter 31 in the first direction D1. The second optical layer 42 is provided between the liquid crystal layer 15 and the second color filter 32 in the first direction D1. The third optical layer 43 is provided between the liquid crystal layer 15 and the third color filter 33 in the first direction D1.

[0052] 8, the horizontal axis represents wavelength λ. The vertical axis of the diagram relating to the first color filter 31, the second color filter 32, and the third color filter 33 represents light absorptance Ab0. The vertical axis of the diagram relating to the first optical layer 41, the second optical layer 42, and the third optical layer 43 represents reflectance Rf0.

[0053] The second absorptance Ab2 of the first color filter 31 at the second wavelength λ2 is higher than the first absorptance Ab1 of the first color filter 31 at the first wavelength λ1. The first wavelength λ1 is different from the second wavelength λ2. The fifth absorptance Ab5 of the first color filter 31 at the third wavelength λ3 is higher than the first absorptance Ab1. The third wavelength λ3 is different from the first wavelength λ1 and the second wavelength λ2.

[0054] The third absorptance Ab3 of the second color filter 32 at the first wavelength λ1 is higher than the fourth absorptance Ab4 of the second color filter 32 at the second wavelength λ2. The sixth absorptance Ab6 of the second color filter 32 at the third wavelength λ3 is higher than the fourth absorptance Ab4.

[0055] The seventh absorptance Ab7 of the third color filter 33 at the first wavelength λ1 and the eighth absorptance Ab8 of the third color filter 33 at the second wavelength λ2 are each higher than the ninth absorptance Ab9 of the third color filter 33 at the third wavelength λ3.

[0056] The second reflectance Rf2 of the first optical layer 41 at the second wavelength λ2 is higher than the first reflectance Rf1 at the first wavelength λ1 of the first optical layer 41. The third reflectance Rf3 of the first optical layer 41 at the third wavelength λ3 is higher than the first reflectance Rf1.

[0057] The seventh reflectance Rf7 of the second optical layer 42 at the first wavelength λ1 and the ninth reflectance Rf9 of the second optical layer 42 at the third wavelength λ3 are each higher than the eighth reflectance Rf8 of the second optical layer 42 at the second wavelength λ2.

[0058] The fourth reflectance Rf4 of the third optical layer 43 at the first wavelength λ1 and the fifth reflectance Rf5 of the third optical layer 43 at the second wavelength λ2 are each higher than the sixth reflectance Rf6 of the third optical layer 43 at the third wavelength λ3.

[0059] The optical member 51 is configured to reflect light reflected by the first optical layer 41, light reflected by the second optical layer 42, and light reflected by the third optical layer 43.

[0060] An optical layer that reflects wavelengths that are highly absorbed by the color filter is combined with the color filter, thereby making efficient use of light and providing a display device that can improve efficiency.

[0061] 8, the first wavelength λ1 is longer than the second wavelength λ2, and the third wavelength λ3 is between the second wavelength λ2 and the first wavelength λ1.

[0062] In the configuration of the display device 120, the first wavelength λ1 may be longer than the third wavelength λ3, and the second wavelength λ2 may be between the third wavelength λ3 and the first wavelength λ1. In the configuration of the display device 120, the second wavelength λ2 may be longer than the first wavelength λ1, and the third wavelength λ3 may be between the first wavelength λ1 and the second wavelength λ2.

[0063] FIG. 9 is a schematic cross-sectional view illustrating the display device according to the first embodiment. FIG. 10 is a schematic view illustrating the display device according to the first embodiment. 9, the filter member 30 includes a first optical layer 41 and a second optical layer 42, and does not include the third optical layer 43. The remaining configuration of the display device 130 may be similar to that of the display device 120, for example.

[0064] In the display device 130, the filter member 30 includes a first color filter 31, a second color filter 32, a third color filter 33, a first optical layer 41, and a second optical layer 42. A second direction D2 from the first color filter 31 to the second color filter 32 intersects with the first direction D1. A direction from the first color filter 31 to the third color filter 33 intersects with the first direction D1. The direction from the first color filter 31 to the third color filter 33 may be along the second direction D2. The first optical layer 41 is provided between the liquid crystal layer 15 and the first color filter 31 in the first direction D1. The second optical layer 42 is provided between the liquid crystal layer 15 and the second color filter 32 in the first direction D1.

[0065] The second absorptance Ab2 of the first color filter 31 at the second wavelength λ2 is higher than the first absorptance Ab1 of the first color filter 31 at the first wavelength λ1. The first wavelength λ1 is different from the second wavelength λ2. The fifth absorptance Ab5 of the first color filter 31 at the third wavelength λ3 is higher than the first absorptance Ab1. The third wavelength λ3 is different from the first wavelength λ1 and the second wavelength λ2.

[0066] The third absorptance Ab3 of the second color filter 32 at the first wavelength λ1 is higher than the fourth absorptance Ab4 of the second color filter 32 at the second wavelength λ2. The sixth absorptance Ab6 of the second color filter 32 at the third wavelength λ3 is higher than the fourth absorptance Ab4.

[0067] The seventh absorptance Ab7 of the third color filter 33 at the first wavelength λ1 and the eighth absorptance Ab8 of the third color filter 33 at the second wavelength λ2 are each higher than the ninth absorptance Ab9 of the third color filter 33 at the third wavelength λ3.

[0068] The second reflectance Rf2 of the first optical layer 41 at the second wavelength λ2 is higher than the first reflectance Rf1 at the first wavelength λ1 of the first optical layer 41. The third reflectance Rf3 of the first optical layer 41 at the third wavelength λ3 is higher than the first reflectance Rf1.

[0069] The fourth reflectance Rf4 of the second optical layer 42 at the first wavelength λ1 is higher than the fifth reflectance Rf5 at the second wavelength λ2 of the second optical layer 42. The sixth reflectance Rf6 of the second optical layer 42 at the third wavelength λ3 is higher than the fifth reflectance Rf5.

[0070] The optical member 51 is configured to reflect light reflected by the first optical layer 41 and light reflected by the second optical layer .

[0071] In the display device 130, for each of the two types of color filters, an optical layer that reflects wavelengths with high absorption in the color filter is combined with the color filter. Light is used efficiently. A display device that can improve efficiency is provided. For one type of color filter, the optical layer is omitted. The process is simplified.

[0072] 9, the filter member 30 may further include a non-colored layer 35. The first optical layer 41 is located between a portion of the non-colored layer 35 and the first color filter 31. The second optical layer 42 is located between another portion of the non-colored layer 35 and the second color filter 32. The third color filter 33 contacts the non-colored layer 35 in the first direction D1.

[0073] In the example of Figure 10, the third wavelength λ3 is longer than the second wavelength λ2. The first wavelength λ1 is between the second wavelength λ2 and the third wavelength λ3. For example, the first color filter 31 is green. For example, the second color filter 32 is blue. For example, the third color filter 33 is red.

[0074] 11 and 12 are schematic views illustrating the display device according to the first embodiment. In these figures, the horizontal axis represents wavelength λ. The vertical axis of the figures relating to the first color filter 31, the second color filter 32, and the third color filter 33 represents light absorptance Ab0. The vertical axis of the figures relating to the first optical layer 41 and the second optical layer 42 represents reflectance Rf0.

[0075] In the display device 130a illustrated in FIG. 11, the first wavelength λ1 is longer than the second wavelength λ2. The third wavelength λ3 is between the second wavelength λ2 and the first wavelength λ1. For example, the first color filter 31 is red. For example, the second color filter 32 is blue. For example, the third color filter 33 is green.

[0076] In the display device 130b illustrated in FIG. 12, the first wavelength λ1 is longer than the third wavelength λ3. The second wavelength λ2 is between the third wavelength λ3 and the first wavelength λ1. For example, the first color filter 31 is red. For example, the second color filter 32 is green. For example, the third color filter 33 is blue. In the display devices 130a and 130b, light is also used effectively. A display device capable of improving efficiency is provided.

[0077] The display device 130a may have a configuration similar to that of the display device 130, except for the characteristics illustrated in Fig. 11. The display device 130b may have a configuration similar to that of the display device 130, except for the characteristics illustrated in Fig. 12.

[0078] FIG. 13 is a schematic cross-sectional view illustrating the display device according to the first embodiment. FIG. 14 is a schematic view illustrating the display device according to the first embodiment. 13, the filter member 30 includes the first optical layer 41, and omits the second optical layer 42 and the third optical layer 43. The remaining configuration of the display device 140 may be similar to that of the display device 120, for example.

[0079] In the display device 140, the filter member 30 includes a first color filter 31, a second color filter 32, a third color filter 33, and a first optical layer 41. A second direction D2 from the first color filter 31 to the second color filter 32 intersects with the first direction D1. A direction from the first color filter 31 to the third color filter 33 intersects with the first direction D1. The direction from the first color filter 31 to the third color filter 33 may be along the second direction D2. The first optical layer 41 is located between the liquid crystal layer 15 and the first color filter 31 in the first direction D1.

[0080] 14 illustrates the characteristics of the first color filter 31, the second color filter 32, the third color filter 33, and the first optical layer 41. In FIG. 14, the horizontal axis represents wavelength λ. The vertical axis of the diagram relating to the first color filter 31, the second color filter 32, and the third color filter 33 represents light absorptance Ab0. The vertical axis of the diagram relating to the first optical layer 41 represents reflectance Rf0.

[0081] The second absorptance Ab2 of the first color filter 31 at the second wavelength λ2 is higher than the first absorptance Ab1 of the first color filter 31 at the first wavelength λ1. The first wavelength λ1 is different from the second wavelength λ2. The fifth absorptance Ab5 of the first color filter 31 at the third wavelength λ3 is higher than the first absorptance Ab1. The third wavelength λ3 is different from the first wavelength λ1 and the second wavelength λ2.

[0082] The third absorptance Ab3 of the second color filter 32 at the first wavelength λ1 is higher than the fourth absorptance Ab4 of the second color filter 32 at the second wavelength λ2. The sixth absorptance Ab6 of the second color filter 32 at the third wavelength λ3 is higher than the fourth absorptance Ab4.

[0083] The seventh absorptance Ab7 of the third color filter 33 at the first wavelength λ1 and the eighth absorptance Ab8 of the third color filter 33 at the second wavelength λ2 are each higher than the ninth absorptance Ab9 of the third color filter 33 at the third wavelength λ3.

[0084] The second reflectance Rf2 of the first optical layer 41 at the second wavelength λ2 is higher than the first reflectance Rf1 of the first optical layer 41 at the first wavelength λ1. The third reflectance Rf3 of the first optical layer 41 at the third wavelength λ3 is higher than the first reflectance Rf1. Light is used effectively. A display device capable of improving efficiency is provided. An optical layer is omitted in two types of color filters. The process is simplified.

[0085] 13, the filter member 30 may further include an uncolored layer 35. The first optical layer 41 is located between a portion of the uncolored layer 35 and the first color filter 31. The second color filter 32 contacts another portion of the uncolored layer 35 in the first direction D1. The third color filter 33 contacts yet another portion of the uncolored layer 35 in the first direction D1.

[0086] 14, the first wavelength λ1 is longer than the second wavelength λ2. The third wavelength λ3 is between the second wavelength λ2 and the first wavelength λ1. For example, the first color filter 31 is red. For example, the second color filter 32 is blue. For example, the third color filter 33 is green.

[0087] 15 and 16 are schematic views illustrating the display device according to the first embodiment. In these figures, the horizontal axis represents wavelength λ. The vertical axis of the figures relating to the first color filter 31, the second color filter 32, and the third color filter 33 represents light absorptance Ab0. The vertical axis of the figure relating to the first optical layer 41 represents reflectance Rf0.

[0088] In the display device 140a illustrated in FIG. 15, the third wavelength λ3 is longer than the second wavelength λ2. The first wavelength λ1 is between the second wavelength λ2 and the third wavelength λ3. For example, the first color filter 31 is green. For example, the second color filter 32 is blue. For example, the third color filter 33 is red.

[0089] In the display device 140b illustrated in FIG. 16, the second wavelength λ2 is longer than the first wavelength λ1. The third wavelength λ3 is between the first wavelength λ1 and the second wavelength λ2. For example, the first color filter 31 is blue. For example, the second color filter 32 is red. For example, the third color filter 33 is green. In the display devices 140a and 140b, light is also used effectively. A display device capable of improving efficiency is provided.

[0090] The display device 140a may have a configuration similar to that of the display device 140, except for the characteristics illustrated in Fig. 15. The display device 140b may have a configuration similar to that of the display device 140, except for the characteristics illustrated in Fig. 16.

[0091] FIG. 17 is a schematic perspective view illustrating a part of the display device according to the first embodiment. 17 shows one example of the light source 50. As already described, the light source 50 may include the light emitting section 52 in addition to the optical member 51. As already described, the optical member 51 is located between the light emitting section 52 and the liquid crystal layer 15 (see FIG. 1, etc.).

[0092] 17, the optical member 51 may include a first optical sheet 51a. The first optical sheet 51a includes a plurality of first recesses 51p. First side surfaces 51ps of the plurality of first recesses 51p are inclined with respect to the first direction D1. For example, the first side surfaces 51ps reflect light reflected by the optical layer and travel toward the liquid crystal layer 15. The plurality of first recesses 51p are, for example, grooves.

[0093] The optical member 51 may further include a second optical sheet 51b. The second optical sheet 51b is provided, for example, between the light emitting portion 52 and the first optical sheet 51a. The second optical sheet 51b includes a plurality of second recesses 51q. Second side surfaces 51qs of the plurality of second recesses 51q are inclined with respect to the first direction D1. The extension direction of the plurality of second recesses 51q intersects with the extension direction of the plurality of first recesses 51p. For example, the second side surfaces 51qs reflect light reflected by the optical layer and travel toward the liquid crystal layer 15.

[0094] The optical member 51 may further include another optical sheet. For example, the another optical sheet is provided between the first optical sheet 51a and the liquid crystal layer 15. For example, the another optical sheet is provided between the first optical sheet 51a and the first polarizing layer 25a. The optical sheet may include a resin.

[0095] The light source 50 may further include a light diffusion sheet 53. The light diffusion sheet 53 is provided between the light emitting portion 52 and the optical member 51.

[0096] As already explained, the first polarizing layer 25a is provided between the optical member 51 and the liquid crystal layer 15.

[0097] The optical layers may be processed using the same masks used to form the corresponding color filters, such that the edges of the optical layers substantially overlap the edges of the corresponding color filters in the Z-axis direction.

[0098] 1, the first color filter 31 includes a first color filter side surface 31s that intersects with the first direction D1. The first optical layer 41 includes a first optical layer side surface 41s that intersects with the first direction D1. The direction from the first optical layer side surface 41s to the first color filter side surface 31s may be along the first direction D1. The optical layers may be provided on the corresponding color filters with high positional accuracy.

[0099] (Second embodiment) 18A to 18D, 19A to 19C, 20A to 20C, 21A to 21C, 22A to 22C, 23A, and 23B are schematic cross-sectional views illustrating the method for manufacturing the display device according to the second embodiment. As shown in Fig. 18A, a light-attenuating film 36f that will become the light-attenuating layer 36 is provided on the substrate 24. As shown in Fig. 18B, a resist 36fR is formed on the light-attenuating film 36f. As shown in Fig. 18C, the resist 36fR is used as a mask to remove part of the light-attenuating film 36f, thereby obtaining the light-attenuating layer 36.

[0100] As shown in Figure 18D, a first color film 31f that will become the first color filter 31 is formed. The first color film 31f may have photosensitivity. The first color film 31f may be, for example, a negative resist film. The first color film 31f may be pre-baked by heat treatment.

[0101] As shown in FIG. 19A, a first structure 45A is prepared. The first structure 45A includes a first optical film 41f and a first base 41S. The first optical film 41f is provided on one surface of the first base 41S. The first optical film 41f becomes the first optical layer 41. The first structure 45A is placed so that the first optical film 41f faces the first color film 31f. This process may be performed in a reduced pressure atmosphere.

[0102] 19B, the first optical film 41f is brought into contact with the first color film 31f, and the first optical film 41f is transferred. The first base body 41S is removed. For example, a laser beam may be used to remove the first base body 41S.

[0103] As shown in FIG. 19C, a first mask M1 is formed on the first optical film 41f. The first mask M1 is processed into a desired shape. Using the first mask M1 as a mask, a portion of the first color film 31f is exposed to light and hardened. The first mask M1 may be formed using, for example, a positive photoresist.

[0104] As shown in FIG. 20A, the first mask M1 is removed.

[0105] As shown in FIG. 20B, another unexposed portion of the first color film 31f and the first optical film 41f thereon are removed. In this process, for example, an ashing process or the like may be performed. For example, minute holes may be formed in the first optical film 41f in advance, which facilitates the processing. After this, a heat treatment may be performed as necessary. The first optical layer 41 is obtained from the first optical film 41f. The first color filter 31 is obtained from the first color film 31f.

[0106] Thus, in the embodiment, for example, the first optical film 41f that will become the first optical layer 41 is formed on the first color film 31f that will become the first color filter 31 provided on the substrate 24. The first mask M1 is used to remove a portion of the first optical film 41f and a portion of the first color film 31f to form the first color filter 31 and the first optical layer 41. As already described, the second absorptance Ab2 of the first color filter 31 at the second wavelength λ2 is higher than the first absorptance Ab1 of the first color filter 31 at the first wavelength λ1. The first wavelength λ1 is different from the second wavelength λ2. The second reflectance Rf2 of the first optical layer 41 at the second wavelength λ2 is higher than the first reflectance Rf1 of the first optical layer 41 at the first wavelength λ1. The first color filter 31 and the first optical layer 41 can be obtained with high productivity.

[0107] 20C, a second color film 32f that will become the second color filter 32 is formed on the substrate 24 and the first optical layer 41. The second color film 32f may be photosensitive.

[0108] As shown in Fig. 21A, a second structure 45B is prepared. The second structure 45B includes a second optical film 42f and a second base 42S. The second optical film 42f is provided on one surface of the second base 42S. The second optical film 42f becomes the second optical layer 42. The second structure 45B is placed so that the second optical film 42f faces the second color film 32f.

[0109] 21B, the second optical film 42f is brought into contact with the second color film 32f, and the second optical film 42f is transferred. The second substrate 42S is removed.

[0110] 21C, a second mask M2 is formed on the second optical film 42f. The second mask M2 is processed into a desired shape. Using the second mask M2 as a mask, a portion of the second color film 32f is exposed to light and cured.

[0111] As shown in FIG. 22A, the second mask M2 is removed.

[0112] As shown in FIG. 22B, another unexposed portion of the second color film 32f and the second optical film 42f thereon are removed. In this process, for example, an ashing process may be performed. For example, minute holes may be formed in the second optical film 42f in advance, which facilitates the processing. After this, a heat treatment may be performed as necessary. The second optical layer 42 is obtained from the second optical film 42f. The second color filter 32 is obtained from the second color film 32f.

[0113] In this way, the second optical film 42f that will become the second optical layer 42 is formed on the second color film 32f that will become the second color filter 32, which is provided on the substrate 24. A part of the second optical film 42f and a part of the second color film 32f are removed using the second mask M2 to form the second color filter 32 and the second optical layer 42. The third absorptance Ab3 of the second color filter 32 at the first wavelength λ1 is higher than the fourth absorptance Ab4 of the second color filter 32 at the second wavelength λ2. For example, the reflectance of the second optical layer 42 at the first wavelength λ1 (e.g., seventh reflectance Rf7) is higher than the reflectance of the second optical layer 42 at the second wavelength λ2 (e.g., eighth reflectance Rf8).

[0114] 22C, the third optical layer 43 and the third color filter 33 are obtained by the same process as above. A plurality of color filters and a plurality of optical layers can be obtained with high productivity.

[0115] As shown in Fig. 23A, a non-colored layer 35 is formed. As shown in Fig. 23B, a spacer 17 is formed. Furthermore, an alignment film 37 is formed as necessary. The alignment film 37 may contain, for example, a resin (such as polyimide).

[0116] The substrate 24 may correspond to the second substrate 24b. Liquid crystal is introduced between the substrate 24 provided with the color filters and optical layers obtained above and the first substrate 24a. The liquid crystal panel obtained in this manner is combined with the light source 50 to obtain the display device according to the embodiment.

[0117] 24A to 24D, 25A to 25C, 26A to 26C, 27A to 27C, and 28A to 28D are schematic cross-sectional views illustrating a method for manufacturing the display device according to the second embodiment. 24A to 24C, a light-attenuating layer 36 is formed on the substrate 24 by the same process as above. As shown in Fig. 24D, a first color film 31f that will become the first color filter 31 is formed. The first color film 31f does not need to be photosensitive.

[0118] As shown in Fig. 25A, a first structure 45A is prepared. The first structure 45A includes a first optical film 41f and a first base 41S. The first optical film 41f is provided on one surface of the first base 41S. The first optical film 41f becomes the first optical layer 41. The first structure 45A is placed so that the first optical film 41f faces the first color film 31f.

[0119] 25B, the first optical film 41f is brought into contact with the first color film 31f, and the first optical film 41f is transferred. The first base 41S is removed.

[0120] 25C, a first mask M1 is formed on the first optical film 41f. The first mask M1 is processed into a desired shape. Using the first mask M1 as a mask, a portion of the first optical film 41f and a portion of the first color film 31f are removed.

[0121] As shown in FIG. 26A, the desired pattern is obtained by removing a portion of the first optical film 41f and a portion of the first color film 31f.

[0122] 26B, the first mask M1 is removed, and heat treatment is performed as necessary. As a result, the first optical layer 41 is obtained from the first optical film 41f. The first color filter 31 is obtained from the first color film 31f.

[0123] As shown in FIG. 26C, a second color film 32f that will become the second color filter 32 is formed on the substrate 24 and the first optical layer 41.

[0124] As shown in Fig. 27A, a second structure 45B is prepared. The second structure 45B includes a second optical film 42f and a second base 42S. The second optical film 42f is provided on one surface of the second base 42S. The second optical film 42f becomes the second optical layer 42. The second structure 45B is placed so that the second optical film 42f faces the second color film 32f.

[0125] 27B, the second optical film 42f is brought into contact with the second color film 32f, and the second optical film 42f is transferred. The second substrate 42S is removed.

[0126] 27C, a second mask M2 is formed on the second optical film 42f. The second mask M2 has a desired shape.

[0127] As shown in FIG. 28A, the second mask M2 is used as a mask to remove a portion of the second optical film 42f that is not covered by the second mask M2.

[0128] 28A, the second mask M2 is used as a mask to remove a portion of the second color film 32f that is not covered by the second mask M2. At this time, it is desirable to ensure sufficient selectivity in the etching rate between the second color film 32f and the first optical layer 41.

[0129] The second mask M2 is removed. Heat treatment is performed as necessary. The second color filter 32 is obtained from the second color film 32f. The second optical layer 42 is obtained from the second optical film 42f.

[0130] 28D, a third optical layer 43 and a third color filter 33 are obtained by the same process as above. Multiple color filters and multiple optical layers can be obtained with high productivity. Similarly to the above, a non-colored layer 35, a spacer 17, and an alignment film 37 may be formed.

[0131] 29A to 29D, 30A to 30C, 31A to 31C, and 32A to 32C are schematic cross-sectional views illustrating a method for manufacturing the display device according to the second embodiment. 29A to 29C, by the same process as above, a light-attenuating layer 36 is formed on the substrate 24. As shown in Fig. 29D, a first color film 31f that will become the first color filter 31 is formed. The first color film 31f may be photosensitive.

[0132] 30A, a part of the first color film 31f is exposed to light, thereby obtaining the first color filter 31 from the part of the first color film 31f.

[0133] As shown in FIG. 30B, the other part of the first color film 31f that is not exposed is removed.

[0134] Thus, the substrate 24 includes a first region r1 and a second region r2. A first color filter 31 is formed on the first region r1. The first color filter 31 is not formed on the second region r2. The substrate 24 may further include a third region r3. The first color filter 31 is not formed on the third region r3.

[0135] 30C, the third color filter 33 is formed on the third region r3 by the same process as above. The third color filter 33 is not formed on the first color filter 31 or the second region r2.

[0136] 31A, a first structural body 45A is prepared. The first structural body 45A includes a first optical film 41f and a first base 41S. The first optical film 41f is provided on one surface of the first base 41S. The first optical film 41f becomes the first optical layer 41. The first structural body 45A is placed so that the first optical film 41f faces the first color filter 31 and the third color filter 33.

[0137] 31B, the first optical film 41f is brought into contact with the first color filter 31 and the third color filter 33, and the first optical film 41f is transferred. The first substrate 41S is removed. The first optical film 41f includes a first portion p1 on the first color filter 31 and a second portion p2 on the second region r2. In this example, a part of the first portion p1 is on the third color filter 33.

[0138] 31C, a first mask M1 is formed on the first portion p1 of the first optical film 41f. The first mask M1 has a desired shape. The second portion p2 is not covered by the first mask M1.

[0139] 32A, a part (second portion p2) of the first optical film 41f is removed using the first mask M1. By removing the second portion p2, the second region r2 is exposed. The first optical layer 41 is obtained from the remaining first optical film 41f.

[0140] 32B, a second color film 32f that will become the second color filter 32 is formed on the first mask M1 and the second region r2. The second color film 32f includes a third portion p3 on the first mask M1 and a fourth portion p4 on the second region r2.

[0141] As shown in FIG. 32C, the first mask M1 is removed, and the third portion p3 (the second color film 32f provided on the first mask M1) is also removed. Heat treatment is performed as necessary. The second color filter 32 is obtained from the remaining second color film 32f. Multiple color filters and multiple optical layers can be obtained with high productivity. Similarly to the above, the non-colored layer 35, the spacer 17, and the alignment film 37 may be formed.

[0142] As described above, the manufacturing method according to the embodiment may include forming a first optical film 41f, which will become the first optical layer 41, on the first color filter 31 and on the second region r2 provided on the first region r1 of the substrate 24, which includes the first region r1 and the second region r2. The first optical film 41f includes a first portion p1 on the first color filter 31 and a second portion p2 on the second region r2. The manufacturing method may include forming a first mask M1 on the first portion p1. The second portion p2 is not covered by the first mask M1. The manufacturing method may include removing the second portion p2 to expose the second region r2. The manufacturing method may include forming a second color film 32f, which will become the second color filter 32, on the first mask M1 and on the second region r2. The second color film 32f includes a third portion p3 on the first mask M1 and a fourth portion p4 on the second region r2. The manufacturing method may include removing the first mask M1 to remove the third portion p3, and obtaining the second color filter 32 from the remaining fourth portion p4. Multiple color filters and optical layers are obtained with high efficiency.

[0143] Embodiments may include the following features. (Configuration 1) a light source including an optical element; A filter member; A liquid crystal layer; Equipped with the liquid crystal layer is located between the optical member and the filter member in the first direction; The filter member is a first color filter; A second color filter; a first optical layer; and Including, a second direction from the first color filter to the second color filter intersects with the first direction; the first optical layer is located between the liquid crystal layer and the first color filter in the first direction; a second absorptance of the first color filter at a second wavelength that is higher than a first absorptance of the first color filter at a first wavelength; the first wavelength is different from the second wavelength; a third absorptance of the second color filter at the first wavelength is higher than a fourth absorptance of the second color filter at the second wavelength; A display device, wherein a second reflectance of the first optical layer at the second wavelength is higher than a first reflectance of the first optical layer at the first wavelength.

[0144] (Configuration 2) The filter member is A third color filter; a third optical layer provided between the optical member and the third color filter in the first direction; further comprising a direction from the first color filter to the third color filter intersects with the first direction; a fifth absorptance of the first color filter at a third wavelength that is higher than the first absorptance; the third wavelength is different from the first wavelength and the second wavelength; a sixth absorptance of the second color filter at the third wavelength that is higher than the fourth absorptance; a seventh absorptance of the third color filter at the first wavelength and an eighth absorptance of the third color filter at the second wavelength are each higher than a ninth absorptance of the third color filter at the third wavelength; the second reflectance is higher than a third reflectance of the first optical layer at the third wavelength; a fifth reflectance of the third optical layer at the second wavelength is higher than a fourth reflectance of the third optical layer at the first wavelength; 2. The display device according to configuration 1, wherein the fifth reflectance is higher than a sixth reflectance of the third optical layer at the third wavelength.

[0145] (Configuration 3) the first wavelength is longer than the second wavelength; 3. The display device according to configuration 2, wherein the third wavelength is between the second wavelength and the first wavelength.

[0146] (Configuration 4) the first wavelength is longer than the third wavelength; 3. The display device according to configuration 2, wherein the second wavelength is between the third wavelength and the first wavelength.

[0147] (Configuration 5) the second wavelength is longer than the first wavelength; 3. The display device according to configuration 2, wherein the third wavelength is between the first wavelength and the second wavelength.

[0148] (Configuration 6) The filter member further includes a non-colored layer, the first optical layer is located between a portion of the non-colored layer and the first color filter; 6. The display device according to any one of configurations 3 to 5, wherein the second color filter is in contact with the non-colored layer in the first direction.

[0149] (Configuration 7) The filter member further includes a second optical layer; the second optical layer is located between the liquid crystal layer and the second color filter in the first direction; 6. The display device according to any one of configurations 3 to 5, wherein the reflectance of the second optical layer at the first wavelength is higher than the reflectance of the second optical layer at the second wavelength.

[0150] (Configuration 8) The filter member is A third color filter; a second optical layer; and a third optical layer; and further comprising The second optical layer is provided between the liquid crystal layer and the second color filter in the first direction. the third optical layer is provided between the liquid crystal layer and the third color filter in the first direction, a direction from the first color filter to the third color filter intersects with the first direction; a fifth absorptance of the first color filter at a third wavelength that is higher than the first absorptance; the third wavelength is different from the first wavelength and the second wavelength; a sixth absorptance of the second color filter at the third wavelength that is higher than the fourth absorptance; a seventh absorptance of the third color filter at the first wavelength and an eighth absorptance of the third color filter at the second wavelength are each higher than a ninth absorptance of the third color filter at the third wavelength; a third reflectance of the first optical layer at the third wavelength is higher than the first reflectance; a fourth reflectance of the third optical layer at the first wavelength and a fifth reflectance of the third optical layer at the second wavelength are each higher than a sixth reflectance of the third optical layer at the third wavelength; The display device described in configuration 1, wherein a seventh reflectance of the second optical layer at the first wavelength and a ninth reflectance of the second optical layer at the third wavelength are each higher than an eighth reflectance of the second optical layer at the second wavelength.

[0151] (Configuration 9) The filter member is A third color filter; a second optical layer provided between the liquid crystal layer and the second color filter in the first direction; further comprising a direction from the first color filter to the third color filter intersects with the first direction; a fifth absorptance of the first color filter at a third wavelength that is higher than the first absorptance; the third wavelength is different from the first wavelength and the second wavelength; a sixth absorptance of the second color filter at the third wavelength that is higher than the fourth absorptance; a seventh absorptance of the third color filter at the first wavelength and an eighth absorptance of the third color filter at the second wavelength are each higher than a ninth absorptance of the third color filter at the third wavelength; a third reflectance of the first optical layer at the third wavelength is higher than the first reflectance; a fourth reflectance of the second optical layer at the first wavelength is higher than a fifth reflectance of the second optical layer at the second wavelength; 2. The display device of configuration 1, wherein the sixth reflectance of the second optical layer at the third wavelength is higher than the fifth reflectance.

[0152] (Configuration 10) the third wavelength is longer than the second wavelength; 10. The display device of configuration 9, wherein the first wavelength is between the second wavelength and the third wavelength.

[0153] (Configuration 11) the first wavelength is longer than the second wavelength; 10. The display device of configuration 9, wherein the third wavelength is between the second wavelength and the first wavelength.

[0154] (Configuration 12) the first wavelength is longer than the third wavelength; 10. The display device of configuration 9, wherein the second wavelength is between the third wavelength and the first wavelength.

[0155] (Configuration 13) The filter member further includes a non-colored layer, the first optical layer is located between a portion of the non-colored layer and the first color filter; the second optical layer is between another portion of the non-colored layer and the second color filter; 13. The display device according to any one of configurations 9 to 12, wherein the third color filter is in contact with the non-colored layer in the first direction.

[0156] (Configuration 14) the filter member further includes a third color filter; a direction from the first color filter to the third color filter intersects with the first direction; a fifth absorptance of the first color filter at a third wavelength that is higher than the first absorptance; the third wavelength is different from the first wavelength and the second wavelength; a sixth absorptance of the second color filter at the third wavelength that is higher than the fourth absorptance; a seventh absorptance of the third color filter at the first wavelength and an eighth absorptance of the third color filter at the second wavelength are each higher than a ninth absorptance of the third color filter at the third wavelength; a third reflectance of the first optical layer at the third wavelength is higher than the first reflectance; The filter member further includes a non-colored layer, the first optical layer is located between a portion of the non-colored layer and the first color filter; the second color filter is in contact with another part of the non-colored layer in the first direction; 2. The display device according to claim 1, wherein the third color filter is in contact with a further portion of the non-colored layer in the first direction.

[0157] (Configuration 15) the light source further includes a light emitting unit, the optical member is located between the light emitting portion and the liquid crystal layer, the optical member includes a first optical sheet, 15. The display device of any one of configurations 1 to 14, wherein the first optical sheet includes a plurality of first recesses, and first side surfaces of the plurality of first recesses are inclined with respect to the first direction.

[0158] (Configuration 16) the optical member further includes a second optical sheet between the light emitting portion and the first optical sheet, The second optical sheet includes a plurality of second recesses, and second side surfaces of the plurality of second recesses are inclined with respect to the first direction. 16. The display device according to configuration 15, wherein the direction in which the second recesses extend intersects with the direction in which the first recesses extend.

[0159] (Configuration 17) Further comprising a first polarizing layer; 16. The display device of claim 15, wherein the first polarizing layer is between the optical element and the liquid crystal layer.

[0160] (Configuration 18) the first color filter includes a first color filter side surface that intersects with the first direction, the first optical layer includes a first optical layer side surface that intersects with the first direction, 18. The display device according to any one of configurations 1 to 17, wherein the direction from the side surface of the first optical layer to the side surface of the first color filter is along the first direction.

[0161] (Configuration 19) forming a first optical film to be a first optical layer on a first color film to be a first color filter provided on a substrate; using a first mask to remove a portion of the first optical film and a portion of the first color film to form the first color filter and the first optical layer; a second absorptance of the first color filter at a second wavelength that is higher than a first absorptance of the first color filter at a first wavelength; the first wavelength is different from the second wavelength; A method for manufacturing a display device, wherein a second reflectance of the first optical layer at the second wavelength is higher than a first reflectance of the first optical layer at the first wavelength.

[0162] (Configuration 20) a substrate including a first region and a second region, wherein a first optical film serving as a first optical layer is formed on a first color filter provided on the first region and on the second region, the first optical film including a first portion on the first color filter and a second portion on the second region; forming a first mask on the first portion, the second portion not being covered by the first mask; removing the second portion to expose the second region; forming a second color film to be a second color filter on the first mask and on the second region, the second color film including a third portion on the first mask and a fourth portion on the second region; the first mask is removed to remove the third portion, and the second color filter is obtained from the remaining fourth portion.

[0163] According to the embodiment, a display device capable of improving efficiency and a manufacturing method thereof are provided.

[0164] In this specification, "vertical" and "parallel" do not only mean strictly vertical and strictly parallel, but also include variations in the manufacturing process, and may mean substantially vertical and substantially parallel.

[0165] The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. For example, the specific configurations of the elements included in the display device, such as the light source, color filter, and optical layer, are within the scope of the present invention as long as a person skilled in the art can implement the present invention in a similar manner and obtain similar effects by appropriately selecting them from known ranges.

[0166] Furthermore, any combination of two or more elements of each specific example within the scope of technical feasibility is also included within the scope of the present invention as long as it includes the gist of the present invention.

[0167] In addition, all display devices that can be implemented by a person skilled in the art by appropriately modifying the design based on the display device described above as an embodiment of the present invention also fall within the scope of the present invention as long as they include the gist of the present invention.

[0168] In addition, within the scope of the concept of the present invention, a person skilled in the art may come up with various modifications and alterations, and it will be understood that these modifications and alterations also fall within the scope of the present invention. [Explanation of symbols]

[0169] 15: liquid crystal layer, 16a, 16b: first and second electrodes, 17: spacer, 24: substrate, 24a, 24b: first and second substrates, 25a, 25b: first and second polarizing layers, 30: filter member, 31-33: first to third color filters, 31f, 32f: first and second color films, 31s: side surface of first color filter, 35: non-colored layer, 36: light-attenuating layer, 36f: light-attenuating film, 36fR: resist, 37: alignment film, 41-43: first to third optical layers, 41S, 42S: first and second bases, 41f, 42f: first and second optical films, 41s: side surface of first optical layer, 45A, 45B: first and second structures, 50: light source, 51: optical member, 51a, 51b: first and second optical sheets, 51p, 51q: first and second recesses, 51ps, 51qs: first and second side surfaces, 52: light emitting portion, 53: light diffusion sheet, 110, 110a, 110b, 111, 120, 130, 130a, 130b, 140, 140a, 140b: display device, Ab0: light absorptance, Ab1 to Ab9: first to ninth absorptances, D1 to D3: first to third directions, M1, M2: first and second masks, Rf0: reflectance, Rf1 to Rf9: first to ninth reflectances, p1 to p4: first to fourth portions, r1 to r3: first to third regions, λ: wavelength, λ1 to λ3: first to third wavelengths

Claims

1. a light source including an optical element; A filter member; A liquid crystal layer; Equipped with the liquid crystal layer is located between the optical member and the filter member in the first direction; The filter member is a first color filter; A second color filter; a first optical layer; and Including, a second direction from the first color filter to the second color filter intersects with the first direction; the first optical layer is located between the liquid crystal layer and the first color filter in the first direction; a second absorptance of the first color filter at a second wavelength that is higher than a first absorptance of the first color filter at a first wavelength; the first wavelength is different from the second wavelength; a third absorptance of the second color filter at the first wavelength is higher than a fourth absorptance of the second color filter at the second wavelength; A display device, wherein a second reflectance of the first optical layer at the second wavelength is higher than a first reflectance of the first optical layer at the first wavelength.

2. The filter member is A third color filter; a third optical layer provided between the optical member and the third color filter in the first direction; further comprising a direction from the first color filter to the third color filter intersects with the first direction; a fifth absorptance of the first color filter at a third wavelength that is higher than the first absorptance; the third wavelength is different from the first wavelength and the second wavelength; a sixth absorptance of the second color filter at the third wavelength that is higher than the fourth absorptance; a seventh absorptance of the third color filter at the first wavelength and an eighth absorptance of the third color filter at the second wavelength are each higher than a ninth absorptance of the third color filter at the third wavelength; the second reflectance is higher than a third reflectance of the first optical layer at the third wavelength; a fifth reflectance of the third optical layer at the second wavelength is higher than a fourth reflectance of the third optical layer at the first wavelength; The display device according to claim 1 , wherein the fifth reflectance is higher than a sixth reflectance of the third optical layer at the third wavelength.

3. the first wavelength is longer than the second wavelength; The display device according to claim 2 , wherein the third wavelength is between the second wavelength and the first wavelength.

4. the first wavelength is longer than the third wavelength; The display device according to claim 2 , wherein the second wavelength is between the third wavelength and the first wavelength.

5. the second wavelength is longer than the first wavelength; The display device according to claim 2 , wherein the third wavelength is between the first wavelength and the second wavelength.

6. The filter member further includes a non-colored layer, the first optical layer is between a portion of the non-colored layer and the first color filter; 6. The display device according to claim 3, wherein the second color filter is in contact with the non-colored layer in the first direction.

7. The filter member further includes a second optical layer; the second optical layer is located between the liquid crystal layer and the second color filter in the first direction; 6. The display device according to claim 3, wherein the reflectance of the second optical layer at the first wavelength is higher than the reflectance of the second optical layer at the second wavelength.

8. The filter member is A third color filter; a second optical layer; and a third optical layer; and further comprising The second optical layer is provided between the liquid crystal layer and the second color filter in the first direction. the third optical layer is provided between the liquid crystal layer and the third color filter in the first direction, a direction from the first color filter to the third color filter intersects with the first direction; a fifth absorptance of the first color filter at a third wavelength that is higher than the first absorptance; the third wavelength is different from the first wavelength and the second wavelength; a sixth absorptance of the second color filter at the third wavelength that is higher than the fourth absorptance; a seventh absorptance of the third color filter at the first wavelength and an eighth absorptance of the third color filter at the second wavelength are each higher than a ninth absorptance of the third color filter at the third wavelength; a third reflectance of the first optical layer at the third wavelength is higher than the first reflectance; a fourth reflectance of the third optical layer at the first wavelength and a fifth reflectance of the third optical layer at the second wavelength are each higher than a sixth reflectance of the third optical layer at the third wavelength; 2. The display device of claim 1, wherein a seventh reflectance of the second optical layer at the first wavelength and a ninth reflectance of the second optical layer at the third wavelength are each higher than an eighth reflectance of the second optical layer at the second wavelength.

9. The filter member is A third color filter; a second optical layer provided between the liquid crystal layer and the second color filter in the first direction; further comprising a direction from the first color filter to the third color filter intersects with the first direction; a fifth absorptance of the first color filter at a third wavelength that is higher than the first absorptance; the third wavelength is different from the first wavelength and the second wavelength; a sixth absorptance of the second color filter at the third wavelength that is higher than the fourth absorptance; a seventh absorptance of the third color filter at the first wavelength and an eighth absorptance of the third color filter at the second wavelength are each higher than a ninth absorptance of the third color filter at the third wavelength; a third reflectance of the first optical layer at the third wavelength is higher than the first reflectance; a fourth reflectance of the second optical layer at the first wavelength is higher than a fifth reflectance of the second optical layer at the second wavelength; The display device according to claim 1 , wherein a sixth reflectance of the second optical layer at the third wavelength is higher than the fifth reflectance.

10. the third wavelength is longer than the second wavelength; The display device of claim 9 , wherein the first wavelength is between the second wavelength and the third wavelength.

11. the first wavelength is longer than the second wavelength; The display device according to claim 9 , wherein the third wavelength is between the second wavelength and the first wavelength.

12. the first wavelength is longer than the third wavelength; The display device according to claim 9 , wherein the second wavelength is between the third wavelength and the first wavelength.

13. The filter member further includes a non-colored layer, the first optical layer is between a portion of the non-colored layer and the first color filter; the second optical layer is between another portion of the non-colored layer and the second color filter; 13. The display device according to claim 9, wherein the third color filter is in contact with the non-colored layer in the first direction.

14. the filter member further includes a third color filter; a direction from the first color filter to the third color filter intersects with the first direction; a fifth absorptance of the first color filter at a third wavelength that is higher than the first absorptance; the third wavelength is different from the first wavelength and the second wavelength; a sixth absorptance of the second color filter at the third wavelength that is higher than the fourth absorptance; a seventh absorptance of the third color filter at the first wavelength and an eighth absorptance of the third color filter at the second wavelength are each higher than a ninth absorptance of the third color filter at the third wavelength; a third reflectance of the first optical layer at the third wavelength is higher than the first reflectance; The filter member further includes a non-colored layer, the first optical layer is between a portion of the non-colored layer and the first color filter; the second color filter is in contact with another part of the non-colored layer in the first direction; The display device according to claim 1 , wherein the third color filter is in contact with a further part of the non-colored layer in the first direction.

15. the light source further includes a light emitting unit, the optical member is located between the light emitting portion and the liquid crystal layer, the optical member includes a first optical sheet, 6. The display device according to claim 1, wherein the first optical sheet includes a plurality of first recesses, and first side surfaces of the plurality of first recesses are inclined with respect to the first direction.

16. the optical member further includes a second optical sheet between the light emitting portion and the first optical sheet, The second optical sheet includes a plurality of second recesses, and second side surfaces of the plurality of second recesses are inclined with respect to the first direction. The display device according to claim 15 , wherein the extending direction of the second recesses intersects with the extending direction of the first recesses.

17. Further comprising a first polarizing layer; The display device according to claim 15 , wherein the first polarizing layer is between the optical member and the liquid crystal layer.

18. the first color filter includes a first color filter side surface that intersects with the first direction, the first optical layer includes a first optical layer side surface that intersects with the first direction, 6. The display device according to claim 1, wherein a direction from a side surface of the first optical layer to a side surface of the first color filter is along the first direction.

19. forming a first optical film to be a first optical layer on a first color film to be a first color filter provided on a substrate; using a first mask to remove a portion of the first optical film and a portion of the first color film to form the first color filter and the first optical layer; a second absorptance of the first color filter at a second wavelength that is higher than a first absorptance of the first color filter at a first wavelength; the first wavelength is different from the second wavelength; A method for manufacturing a display device, wherein a second reflectance of the first optical layer at the second wavelength is higher than a first reflectance of the first optical layer at the first wavelength.

20. a substrate including a first region and a second region, wherein a first optical film serving as a first optical layer is formed on a first color filter provided on the first region and on the second region, the first optical film including a first portion on the first color filter and a second portion on the second region; forming a first mask on the first portion, the second portion not being covered by the first mask; removing the second portion to expose the second region; forming a second color film to be a second color filter on the first mask and on the second region, the second color film including a third portion on the first mask and a fourth portion on the second region; the first mask is removed to remove the third portion, and the second color filter is obtained from the remaining fourth portion.

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