Display devices and electronic devices

Abstract

To provide a technology which has advantages for reducing differences in chromaticity between pixels.SOLUTION: In a display device having a display area in which multiple pixels are arranged, the multiple pixels include first pixels arranged in the central part of the display area and second pixels arranged between the first pixels and the edge of the display area. Each of the multiple pixels includes a first luminous element and a second luminous element. A color filter layer made of color filter materials is arranged on the first luminous element and the second luminous element. The first luminous element includes a first color filter arranged in the color filter layer. The opening of the first luminous element is defined by the color filter layer. The second luminous element is arranged in the color filter layer and includes a second color filter having a spectral transmittance characteristic different from that of the first color filter, the ratio of the size of the opening to the size of the light emitting area of the first luminous element is smaller in the second pixels than in the first pixels.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a display device and an electronic device. [Background technology]

[0002] Organic EL elements (OLEDs) are light-emitting devices that have a pair of electrodes and an organic compound layer, including a light-emitting layer, disposed between them. Taking advantage of their excellent features, such as surface emission, light weight, and high visibility, OLEDs are increasingly being used as light-emitting devices for applications such as thin displays, lighting fixtures, head-mounted displays, and light sources for electrophotographic printer printheads. Demand for higher resolution OLED displays is particularly strong, and a method using white OLEDs and color filters (hereafter referred to as the white + CF method) has become popular. The white + CF method involves placing multiple color filters with different wavelength-dependent absorption characteristics along the direction of the white light emitted by the OLED. For example, by forming color filters for each color so that the emitted light colors after passing through the color filters are red, green, and blue, a full-color display using additive color mixing is possible. The white + CF method eliminates the need to deposit an organic compound layer for each emitting pixel, making it easy to achieve high-resolution emitting pixels.

[0003] 9 shows an example in which an organic EL display device 10 is used together with a magnifying optical system 20. The dotted lines indicate light rays that are emitted from a display area 11 of the organic EL display device 10 and enter the eye 30 via the magnifying optical system. Light rays emitted in the normal direction of the display area 11 are used in the central part of the display area 11, whereas light rays emitted in an oblique direction (a direction tilted from the normal direction) are used in the peripheral part of the display area 11.

[0004] When a white+CF organic EL display device is viewed through a magnifying optical system, chromaticity unevenness, in which the chromaticity differs between the center and periphery of the display area 11, is a problem. This problem occurs because the color of light emitted from the center of the display area 11 of the organic EL display device 10 in the normal direction differs from the chromaticity of light emitted from the periphery of the display area 11 in an oblique direction. One factor contributing to this is that the intensity ratio of the red, green, and blue components of white light before passing through the color filter differs between the normal direction and an oblique direction. In this case, the emission intensity ratio of the red, green, and blue subpixels after passing through the color filter also changes, resulting in a difference in chromaticity between the light from the red, green, and blue pixels combined in a white display, for example, in a frontal direction and an oblique direction.

[0005] Non-Patent Document 1 discloses an organic EL display device that suppresses chromaticity changes in oblique directions by adjusting the size of the color filters of each color and narrowing the effective aperture ratio of the color filters. [Prior art documents] [Non-patent literature]

[0006] [Non-Patent Document 1] Journal of SID 26 / 3,2018 p.178 Summary of the Invention [Problem to be solved by the invention]

[0007] The display device described in Non-Patent Document 1 uses a method of narrowing the effective aperture ratio of the color filters by adjusting the size of each color filter. Using this method, it is possible to reduce the difference between chromaticity in an oblique direction and chromaticity in a frontal direction. However, since the effective aperture ratio through which light can be extracted is reduced, the light extraction efficiency decreases compared to before adjusting the color filter size, and the power consumption required to obtain the same brightness increases.

[0008] An object of the present invention is to provide an advantageous technique for reducing the difference in chromaticity between pixels. [Means for solving the problem]

[0009] One aspect of the present invention relates to a display device having a display area, the display area including a central portion and a peripheral portion between the central portion and an edge of the display area, a first pixel is arranged in the central portion, a second pixel is arranged in the peripheral portion, the first pixel and the second pixel each include a first light-emitting element and a second light-emitting element, a color filter layer made of a color filter material is arranged on the first light-emitting element and the second light-emitting element, the first light-emitting element includes a first color filter arranged on the color filter layer, and the second light-emitting element is arranged on the color filter layer and has a spectral transmittance different from that of the first color filter. a second color filter having a characteristic, the openings of the first light-emitting element and the second light-emitting element are defined by the color filter layer, the difference between the size of the opening of the first light-emitting element in the first pixel and the size of the opening of the first light-emitting element in the second pixel is larger than the difference between the size of the opening of the second light-emitting element in the first pixel and the size of the opening of the second light-emitting element in the second pixel, the openings are defined by a light-shielding region formed by an overlap of the first color filter and the second color filter, and the size of the light-shielding region of the second pixel is larger than that of the first pixel. [Effects of the Invention]

[0010] The present invention provides an advantageous technique for reducing the chromaticity difference between pixels. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a diagram illustrating an example of a first pixel and a second pixel in a display area of ​​the display device. [Figure 2] 5A and 5B are diagrams illustrating examples of the relationship between the emission angle and chromaticity of light from a light-emitting region. [Figure 3] FIG. 3 is a cross-sectional view schematically showing a first comparative example. [Figure 4] FIG. 10 is a cross-sectional view schematically showing a second comparative example. [Figure 5] The spectral transmittance characteristics of red, green, and blue color filters are illustrated. [Figure 6] FIG. 2 is a diagram schematically showing the cross-sectional structure of a first pixel and a second pixel arranged in a display region of the display device according to the embodiment. [Figure 7] 2 is a diagram schematically showing the planar structure of a first pixel and a second pixel arranged in a display region of the display device of the embodiment. FIG. [Figure 8] FIG. 10 is a diagram schematically showing the cross-sectional structure of a first pixel and a second pixel arranged in a display region of a display device according to another embodiment. [Figure 9] FIG. 10 is a diagram showing an example in which a display device is used together with a magnifying optical system. [Figure 10] FIG. 1 is a diagram showing a display device as an electronic device according to an embodiment. [Figure 11] FIG. 1 is a diagram showing a display device as an electronic device according to an embodiment. [Figure 12] FIG. 1 is a diagram showing a display device as an electronic device according to an embodiment. [Figure 13]1A and 1B are diagrams showing a lighting device according to an embodiment and a moving object. [Figure 14] FIG. 1 is a diagram illustrating a display device as an electronic device according to an embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the scope of the invention claimed. Although multiple features are described in the embodiments, not all of these multiple features are necessarily essential to the invention, and multiple features may be combined arbitrarily. Furthermore, in the accompanying drawings, the same reference numerals are used to designate the same or similar components, and redundant explanations will be omitted.

[0013] FIG. 1 schematically shows a plan view (planar view) of a display area DA of an organic EL display device 10 of this embodiment. A plurality of pixels (main pixels) are arranged in the display area DA, and the plurality of pixels include a first pixel P1 and a second pixel P2. The first pixel P1 is a main pixel arranged in the center of the display area DA, and the second pixel P2 is a main pixel arranged between the first pixel P1 and an edge ED of the display area DA (for example, in the peripheral portion). Each pixel (main pixel) includes a plurality of sub-pixels (organic EL light-emitting elements). It can also be said that the first pixel P1 is included in a first region, which is a main pixel portion, and the second pixel P2 is included in a second region surrounding the first region.

[0014] Here, the relationship between the emission angle of light from a light-emitting region and chromaticity will be described with reference to FIG. 2. FIG. 2(a) schematically shows white light emitted from the light-emitting region ER of the first pixel P1 at an emission angle (θ) of 0° (normal direction). FIG. 2(b) schematically shows white light emitted from the light-emitting region ER of the second pixel P2 at an emission angle (θ) of 40° (oblique direction). FIG. 2(c) illustrates the results of normalizing the peak intensity of the red component (580 nm to 780 nm) and the peak intensity of the blue component (400 nm to 490 nm) contained in the white light by the peak intensity of the green component (490 nm to 580 nm). It can be seen that the intensity ratio of the red component, green component, and blue component (hereinafter referred to as the color component ratio) differs between the normal direction and the oblique direction. This indicates that when the light-emitting region ER is observed from a normal observation point and when it is observed from an oblique observation point, the colors are observed to be different, i.e., the chromaticity is different. The chromaticity of the light synthesized from the transmitted light (i.e., red, green, and blue components) that passes through the red, green, and blue color filters to form white light from the light-emitting region ER also differs between the normal and oblique directions. The example in Figure 2(c) indicates that if the light observed from the normal direction is white, the light observed from an oblique direction has a strong blue component.

[0015] Below, the problems will be described through a first comparative example and a second comparative example, and then an embodiment for solving the problems will be described. Fig. 3 schematically shows the cross-sectional structures of a first pixel (first main pixel) P1 and a second pixel (second main pixel) P2 arranged in a display area DA of an organic EL display device 10 of the first comparative example. The first pixel P1 is a main pixel arranged in the center of the display area DA, and the second pixel P2 is a main pixel arranged between the first pixel P1 and an edge ED of the display area DA (e.g., in the peripheral area). Each of the main pixels P1 and P2 may include three sub-pixels: a first organic EL light-emitting element (hereinafter referred to as the first light-emitting element) 100, a second organic EL light-emitting element (hereinafter referred to as the second light-emitting element) 200, and a third organic EL light-emitting element (hereinafter referred to as the third light-emitting element) 300.

[0016] The first light-emitting element 100 may include a lower electrode 2, an insulating layer 5, an organic compound layer 3, an upper electrode 4, a protective layer 6, a planarization layer 7, a first color filter 101, a filling layer 8, and a counter substrate 9. The second light-emitting element 200 may include a lower electrode 2, an insulating layer 5, an organic compound layer 3, an upper electrode 4, a protective layer 6, a planarization layer 7, a second color filter 201, a filling layer 8, and a counter substrate 9. The third light-emitting element 300 may include a lower electrode 2, an insulating layer 5, an organic compound layer 3, an upper electrode 4, a protective layer 6, a planarization layer 7, a third color filter 301, a filling layer 8, and a counter substrate 9. The upper electrode 4, the protective layer 6, the planarization layer 7, the filling layer 8, and the counter substrate 9 may be shared by the light-emitting elements 100, 200, and 300 (or multiple main pixels). The first light-emitting element 100 is a blue light-emitting element, and the first color filter 101 transmits a blue component. The second light emitting element 200 is a red light emitting element, and the second color filter 201 transmits the red component. The third light emitting element 300 is a green light emitting element, and the third color filter 301 transmits the green component. The color filters 101, 201, and 301 are color filters with different spectral transmittance characteristics.

[0017] In FIG. 3, for convenience, only the light emitted from the first light-emitting element 100 is indicated by a dotted arrow. The organic EL display device 10 of the first comparative example does not have a light-shielding region. Therefore, the color component ratio of the blue, red, and green light after passing through the blue, red, and green color filters 101, 201, and 301 maintains the color component ratio of the white light before passing through the color filters 101, 201, and 301. For example, assume that the white light before passing through the color filters 101, 201, and 301 has the characteristics shown in FIG. 2(c), and the light synthesized from the red, green, and blue light emitted in the normal direction from the first pixel P1 and transmitted through the color filters 101, 201, and 301 is white. In this case, the light synthesized from the red, green, and blue light emitted in the oblique direction from the second pixel P2 and transmitted through the color filters 101, 201, and 301 has a strong blue component.

[0018] FIG. 4 schematically illustrates the cross-sectional structures of a first pixel (first main pixel) P1 and a second pixel (second main pixel) P2 arranged in a display region DA of an organic EL display device 10 of a second comparative example. The second comparative example has a configuration in which a light-shielding region 104 is added to the first comparative example. The light-shielding region 104 defines an opening 103 of the first blue light-emitting element 100. In other words, the light-shielding region 104 limits the amount of light emitted from the first blue light-emitting element 100 that passes through. The first pixel P1 and the second pixel P2 have the same configuration. That is, the light-shielding region 104 has the same size in the first pixel P1 and the second pixel P2. The light-shielding region 104 is formed by an overlap between the first color filter 101 and the second color filter 201. The light-shielding region 104 is also formed by an overlap between the first color filter 101 and the third color filter 301.

[0019] In this specification, the term "size" may refer to, for example, a one-dimensional dimension or a two-dimensional dimension (e.g., area). Furthermore, in this specification, the opening of a light-emitting element refers to a portion that functions to determine the amount of light that passes through the light-emitting region of the light-emitting element. The opening of a light-emitting element may be a region where a color filter and a light-shielding region provided on the light-emitting element do not overlap in a planar view.

[0020] FIG. 5 illustrates the spectral transmittance characteristics of color filters 101, 201, and 301. The first color filter 101 is a blue color filter, i.e., a color filter that transmits a blue component. The second color filter 201 is a red color filter, i.e., a color filter that transmits a red component. The third color filter 301 is a green color filter, i.e., a color filter that transmits a green component. FIG. 5 shows that the overlapping of the first color filter 101 and the second color filter 201 provides a light-blocking characteristic (attenuation characteristic due to light absorption). FIG. 5 also shows that the overlapping of the first color filter 101 and the third color filter 301 provides a light-blocking characteristic (attenuation characteristic due to light absorption).

[0021] In the second comparative example, the provision of the light-shielding region 104 reduces the blue component in the light emitted in an oblique direction from the first blue light-emitting element 100 of the second pixel P2. However, in the second comparative example, the light-shielding regions 104 of the first pixel P1 and the second pixel P2 have the same configuration, and therefore the blue component in the light emitted in the normal direction from the first blue light-emitting element 100 of the first pixel P1 is also reduced by the light-shielding region 104. Therefore, the efficiency of the first light-emitting element 100 of the first pixel P1, which is located in the center, decreases. This means that power consumption to obtain a desired brightness increases.

[0022] An organic EL display device 10 according to an embodiment will now be described. FIGS. 6 and 7 schematically show the cross-sectional and planar structures of a first pixel (first main pixel) P1 and a second pixel (second main pixel) P2 arranged in a display area DA of the organic EL display device 10 according to an embodiment. The first pixel P1 is a main pixel arranged in the center of the display area DA, and the second pixel P2 is a main pixel arranged between the first pixel P1 and an edge ED of the display area DA (for example, in the peripheral area). Each of the main pixels P1 and P2 may include three sub-pixels: a first light-emitting element 100, a second light-emitting element 200, and a third light-emitting element 300. A color filter layer CFL made of a color filter material is arranged on the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300.

[0023] The first light-emitting element 100 may include a lower electrode 2, an insulating layer 5, an organic compound layer 3, an upper electrode 4, a protective layer 6, a planarization layer 7, a first color filter 101, a filling layer 8, and a counter substrate 9 arranged on a substrate 1. The second light-emitting element 200 may include a lower electrode 2, an insulating layer 5, an organic compound layer 3, an upper electrode 4, a protective layer 6, a planarization layer 7, a second color filter 201, a filling layer 8, and a counter substrate 9 arranged on a substrate 1. The third light-emitting element 300 may include a lower electrode 2, an insulating layer 5, an organic compound layer 3, an upper electrode 4, a protective layer 6, a planarization layer 7, a third color filter 301, a filling layer 8, and a counter substrate 9 arranged on a substrate 1. The upper electrode 4, the protective layer 6, the planarization layer 7, the filling layer 8, and the counter substrate 9 may be shared by the light-emitting elements 100, 200, and 300 (or multiple main pixels).

[0024] The first light-emitting element 100 has a first light-emitting region 102. Here, as necessary, the first light-emitting region 102 of the first light-emitting element 100 of the first pixel P1 will be referred to as the first light-emitting region 102a, and the first light-emitting region 102 of the first light-emitting element 100 of the second pixel P2 will be referred to as the first light-emitting region 102b, and will be described separately. The first light-emitting region 102 may be a region where the region where the first light-emitting element 100 emits light is projected onto the upper surface of the substrate 1. The second light-emitting element 200 has a second light-emitting region 202. The second light-emitting region 202 may be a region where the region where the second light-emitting element 200 emits light is projected onto the upper surface of the substrate 1. The third light-emitting element 300 has a third light-emitting region 302. The third light-emitting region 302 may be a region where the region where the third light-emitting element 300 emits light is projected onto the upper surface of the substrate 1.

[0025] The first color filter 101, the second color filter 201, and the third color filter 301 are disposed on the color filter layer CFL. From another perspective, the first color filter 101, the second color filter 201, and the third color filter 301 constitute the color filter layer CFL. The color filter layer CFL may be configured not to include a reflective film such as a metal film. Furthermore, the color filter layer CFL may be configured not to be in contact with a reflective film such as a metal film. Such a reflective film may cause chromaticity deviation, so it is not preferable to dispose it on the color filter layer CFL or to dispose it so as to be in contact with the color filter layer CFL.

[0026] The first light emitting element 100 is a blue light emitting element, and the first color filter 101 transmits the blue component. The second light emitting element 200 is a red light emitting element, and the second color filter 201 transmits the red component. The third light emitting element 300 is a green light emitting element, and the third color filter 301 transmits the green component. The color filters 101, 201, and 301 are color filters with different spectral transmittance characteristics, and may have, for example, the spectral transmittances shown in FIG. 5.

[0027] In this embodiment, the first pixel P1 may have a first light-shielding region 104a, and the second pixel P2 may have a second light-shielding region 104b. The first light-shielding region 104a may define an opening 103a of the first light-emitting element 100 of the first pixel P1, and the second light-shielding region 104b may define an opening 103b of the first light-emitting element 100 of the second pixel P2. The first light-shielding region 104a may limit the amount of light that passes through the first light-emitting element 100 of the first pixel P1, and the second light-shielding region 104b may limit the amount of light that passes through the first light-emitting element 100 of the second pixel P2. In the second pixel P2, the center of the light-emitting region 102b of the first light-emitting element 100 and the center of the opening 103b may be offset from each other in a planar view.

[0028] The first light-shielding region 104a and the second light-shielding region 104b may be defined such that the size of the first light-shielding region 104a is smaller than the size of the second light-shielding region 104b. Therefore, the first pixel P1 and the second pixel P2 have different configurations. The first light-shielding region 104a may be defined by the overlap between the first color filter 101 and the second color filter 201 in the first pixel P1, and the overlap between the first color filter 101 and the third color filter 301 in the first pixel P1. The second light-shielding region 104b may be defined by the overlap between the first color filter 101 and the second color filter 201 in the second pixel P2, and the overlap between the first color filter 101 and the third color filter 301 in the second pixel P2.

[0029] In this embodiment, the ratio of the size of the openings 103a, 103b to the size of the first light-emitting regions 102a, 102b is smaller in the second pixel P2 than in the first pixel P1. That is, the ratio of the size of the opening 103b of the second pixel P2 to the size of the first light-emitting region 102b of the second pixel P2 is smaller than the ratio of the size of the opening 103a of the first pixel P1 to the size of the first light-emitting region 102 of the first pixel P1. The ratio of the size of the opening 103b of the second pixel P2 to the size of the first light-emitting region 102b of the second pixel P2 is given by (size of the opening 103b of the second pixel P2) / (size of the first light-emitting region 102b of the second pixel P2). The ratio of the size of the opening 103a of the first pixel P1 to the size of the first light-emitting region 102 of the first pixel P1 is given by (size of the opening 103a of the first pixel P1) / (size of the first light-emitting region 102a of the first pixel P1).

[0030] According to this embodiment, by providing the light-shielding region 104b in the second pixel P2, it is possible to reduce the blue component in the light emitted in an oblique direction from the first blue light-emitting element 100 of the second pixel P2, as in the second comparative example. Furthermore, according to this embodiment, a configuration is adopted in which the ratio of the size of the openings 103a and 103b to the size of the first light-emitting regions 102a and 102b is smaller in the second pixel P2 than in the first pixel P1. This makes it possible to suppress attenuation of the light emitted in the normal direction from the first blue light-emitting element 100 of the first pixel P1. This makes it possible to reduce power consumption to obtain a desired brightness compared to Comparative Example 2. In other words, according to this embodiment, it is possible to reduce the chromaticity difference between pixels and also reduce power consumption.

[0031] A configuration in which the ratio of the size of the aperture of the light-emitting element to the size of the first light-emitting region is smaller in the second pixel P2 than in the first pixel P1 can be achieved by making the size of the aperture 103b of the second pixel P2 smaller than the size of the aperture 103a of the first pixel P1. For example, the light-shielding region 104b of the second pixel P2 can be made larger than the light-shielding region 104a of the first pixel P1. Such a configuration is illustrated in FIGS. 6 and 7. The difference in size between the aperture 103a of the first light-emitting element 100 of the first pixel P1 and the aperture 103b of the first light-emitting element 100 of the second pixel P2 can be made larger than the difference in size between the first light-emitting region 102a of the first pixel P1 and the first light-emitting region 102b of the second pixel P2. Alternatively, the size of the first light-emitting region 102a of the first pixel P1 can be made equal to the size of the first light-emitting region 102b of the second pixel P2.

[0032] A configuration in which the ratio of the size of the aperture of the light-emitting element to the size of the first light-emitting region is smaller in the second pixel P2 than in the first pixel P1 may be realized by a configuration in which the size of the light-emitting region 102b of the first light-emitting element in the second pixel is larger than the size of the light-emitting region 102a of the first light-emitting element in the first pixel. Such a configuration is illustrated in FIG. 8. The difference in size between the light-emitting region 102b of the first light-emitting element 100 in the second pixel P2 and the light-emitting region 102a of the first light-emitting element 100 in the first pixel P1 may be larger than the difference in size between the opening 103a of the first pixel P1 and the opening 103b of the second pixel P2. Alternatively, the size of the opening 103a of the first pixel P1 may be equal to the size of the opening 103b of the second pixel P2.

[0033] In the above embodiment, an example has been described in which the light-shielding regions 104a and 104b are formed by overlapping color filters having different spectral transmittance characteristics. However, this is merely one embodiment, and the light-shielding regions 104a and 104b may also be formed by overlapping the color filter 101 and a light-absorbing material such as a black matrix. The light-absorbing material may be a material that absorbs at least the blue component.

[0034] In the above embodiment, the explanation has been focused on suppressing blue components in diagonal directions, but the present invention is not limited to this, and the image configuration may be adjusted based on the above explanation depending on the position of the pixel in the display area so as to suppress other frequency components.

[0035] Although the above embodiment has been described using two types of pixels, the first pixel and the second pixel, as an example, more types of pixels may be provided. For example, the structure of each pixel may be adjusted so that the above ratio changes gradually or stepwise from the center to the edge of the display area.

[0036] In the above embodiment, one pixel (main pixel) is composed of three sub-pixels, but the number of sub-pixels constituting one pixel can be changed depending on the desired color reproduction range. One pixel can be composed of at least two sub-pixels. Alternatively, one pixel can be composed of four sub-pixels. In this case, the four sub-pixels can be sub-pixels for red, green, blue, and white components. Alternatively, one pixel can be composed of five or more sub-pixels.

[0037] The arrangement of the sub-pixels in each pixel (main pixel) is not limited to a particular format, but is preferably, for example, a stripe structure, a delta arrangement, or a Bayer arrangement. Fig. 7 shows a plan view of a stripe structure.

[0038] The difference in color component ratio between the normal direction and the oblique direction has been illustrated with reference to Figure 2. Wavelengths at which the light intensity is less likely to decrease in the oblique direction than in the normal direction are wavelengths at which the light emission intensity is enhanced by the optical distance from the light-emitting layer to the lower electrode and the phase shift in the lower electrode. Therefore, it is preferable that the transmittance peak wavelength of the first color filter is within the wavelength range λ given by the following formula. Furthermore, it is preferable that the PL spectrum peak of the light-emitting material contained in the light-emitting layer is also within the wavelength range λ given by the following formula.

[0039] 2L / (m-φ / 2π) ×0.85 ≦ λ ≦ 2L / (m-φ / 2π) ×1.15 Here, m is an integer equal to or greater than 0, φ is a phase shift at the lower electrode, λ is a wavelength, and L is an optical distance from the light-emitting layer to the lower electrode.

[0040] In particular, the optical distance from the light-emitting layer to the lower electrode, the wavelength at which the emission intensity is enhanced by the phase shift in the lower electrode, and the transmittance peak wavelength of the first color filter are preferably blue components. The blue component is advantageous for expanding the color reproduction range, and the transmittance peak wavelength of the first color filter is preferably in the range of 400 nm to 490 nm. In other words, the first color filter is preferably a blue color filter.

[0041] A configuration may be adopted in which, in the central part of the display area, the center of the first light-emitting area and the center of the opening of the first color filter coincide in a planar view, and in the peripheral part, the center of the first light-emitting area and the center of the opening of the first color filter do not coincide in a planar view.

[0042] Hereinafter, specific examples of the components of the organic EL display device 10 of this embodiment will be described.

[0043] The material of the substrate 1 is not limited as long as it can support the lower electrode 2, the organic compound layer 3, the upper electrode 4, etc. Suitable materials for the substrate 1 include, for example, quartz, glass, plastic, silicon, resin, and metal. On the substrate 1, switching elements such as transistors, wiring, an interlayer insulating film (not shown), etc. can be formed.

[0044] The lower electrodes 2 of the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300 are electrically isolated from each other. From the viewpoint of light-emitting efficiency, the lower electrodes 2 may be made of a metal material having a visible light reflectance of 50% or more. Specifically, the lower electrodes 2 may be made of a metal such as Al or Ag, or an alloy of these metals with Si, Cu, Ni, Nd, Ti, or the like added. The lower electrodes 2 may also have a barrier layer on the light-emitting side surface. Examples of materials for the barrier layer include metals such as Ti, W, Mo, and Au, or alloys thereof, or transparent conductive oxides such as ITO and IZO. To optimize optical interference, the film thicknesses of the transparent conductive oxides may differ among the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300.

[0045] The organic compound layer 3 may be disposed across all or part of all pixels arranged in the display area DA, i.e., may be disposed in common across all of them. Focusing on each pixel, the organic compound layer 3 may be disposed across the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300, i.e., may be disposed in common across all of them. The organic compound layer 3 may be formed by a known technique, such as vapor deposition or spin coating. The organic compound layer 3 may be disposed continuously across the entire display area DA. Focusing on each pixel, the organic compound layer 3 may be disposed continuously across the region where the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300 are arranged.

[0046] The organic compound layer 3 is a layer including at least a light-emitting layer, and may be composed of multiple layers. Examples of the multiple layers include a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer. These layers are not limited to those consisting only of organic compounds, and may also contain inorganic compounds. Since the main light emission occurs in the organic compounds, the device can be called an organic EL device.

[0047] In the organic compound layer 3, holes injected from the anode and electrons injected from the cathode recombine in the light-emitting layer, causing the light-emitting layer to emit white light. The light-emitting layer may be composed of multiple layers, and any one of the light-emitting layers may contain a red light-emitting material, a green light-emitting material, or a blue light-emitting material, and white light can be obtained by mixing the emitted colors. Furthermore, any one of the light-emitting layers may contain light-emitting materials that emit light of complementary colors, such as a blue light-emitting material and a yellow light-emitting material.

[0048] An electron injection layer (not shown) may be disposed between the organic compound layer 3 and the upper electrode 4. The electron injection layer may be composed of a compound with high electron donating properties. The compound with high electron donating properties may include, for example, a metal with high electron donating properties, such as an alkali metal such as lithium or cesium, or an alkaline earth metal such as calcium or barium, or a compound thereof. The compound with high electron donating properties may also be an organometallic complex in which such a metal is combined with an organic compound. These materials may be used as a single layer, or may be mixed with the organic compound of the electron transport layer.

[0049] The upper electrode 4 may be disposed across all or part of all pixels arranged in the display area DA, i.e., may be commonly disposed across all of them. Focusing on each pixel, the upper electrode 4 may be disposed across the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300, i.e., commonly disposed across all of them. The upper electrode 4 is optically transparent. The upper electrode 4 may be made of a semi-transparent material that transmits part of the light that reaches its surface and reflects the other part of the light (i.e., semi-transparent and reflective). The upper electrode 4 may be made of a transparent material such as a transparent conductive oxide; a semi-transparent material made of an elemental metal such as aluminum, silver, or gold; an alkali metal such as lithium or cesium; an alkaline earth metal such as magnesium, calcium, or barium; or an alloy material containing these metal materials. The semi-transparent material may particularly be an alloy primarily composed of magnesium or silver. The upper electrode 4 may also be a laminated structure of the above materials as long as it has a desirable transmittance. In one example, the bottom electrode 2 can be an anode and the top electrode 4 can be a cathode, while in another example, the bottom electrode 2 can be a cathode and the top electrode 4 can be an anode.

[0050] An insulating layer 5 may be disposed between the lower electrodes 2 of the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300. The insulating layer 5 may be disposed, for example, so as to cover the ends of the lower electrodes 2 of the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300, and may have openings that expose the inner regions of the ends of the lower electrodes 2. The insulating layer 5 may define the light-emitting regions of the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300. If the insulating layer 5 is not provided, the first light-emitting region 102, the second light-emitting region 202, and the third light-emitting region 302 may be defined by the shape of the lower electrode 2 itself. The insulating layer 5 may be composed of an inorganic material such as silicon nitride (SiN), silicon oxynitride (SiON), or silicon oxide (SiO). The insulating layer 5 may be formed using a known technique such as sputtering or chemical vapor deposition (CVD). The insulating layer 5 may be made of an organic material such as an acrylic resin or a polyimide resin.

[0051] The organic EL display device 10 may include a protective layer 6. The protective layer 6 may be disposed to cover the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300. The protective layer 6 preferably contains an inorganic material that is optically transparent and has extremely low permeability to oxygen and moisture from the outside. Silicon nitride (SiN), silicon oxynitride (SiON), silicon oxide (SiOx), aluminum oxide (Al2O3), titanium oxide (TiO2), or the like is particularly preferred. The protective layer 6 may be formed by sputtering, chemical vapor deposition (CVD), or atomic layer deposition (ALD). As long as the protective layer 6 has sufficient moisture-blocking properties, it may be in the form of a single layer or a laminate of the above-mentioned materials, or may be a laminate of the above-mentioned inorganic and organic materials. Known organic compounds (resins / polymer compounds) may be used as the organic material. The protective layer 6 may have irregularities following the shape of the structure formed prior to the protective layer 6. The protective layer 6 may also be called a sealing layer. Even if it is called a sealing layer, its ability to seal the organic EL display device 10 does not have to be perfect.

[0052] The organic EL display device 10 may have a planarization layer 7 between the protective layer 6 and the color filter layer CFL. The planarization layer 7 is formed of a light-transmitting material, and the material may be either an inorganic material or an organic material. If the planarization layer 7 is formed of a resin material, the unevenness on the light-emitting side of the planarization layer 7 will be smaller than that of the protective layer 6, thereby reducing scattered light due to the unevenness of the protective layer 6. The planarization layer 7 may also be called a coating layer. The planarization layer 7 may be made of an organic material such as an acrylic resin, an epoxy resin, or a silicone resin. The planarization layer 7 may be formed by a known method, such as a coating method or a polymerization deposition method.

[0053] The color filter layer CFL may be formed directly on the protective layer 6 or the planarizing layer 7, or an opposing substrate on which the color filter layer CFL is formed may be bonded to a substrate on which the light-emitting elements 100, 200, 300 are formed. In the latter case, bonding may be performed via a resin so that no gap is generated between the light-emitting elements 100, 200, 300 and the color filter layer CFL.

[0054] The first color filter 101, the second color filter 201, and the third color filter 301 can be formed by applying a color resist onto a base such as the planarization layer 7, and then patterning it by lithography. The color resist is made of, for example, a photocurable resin, and forms a pattern by curing the portions irradiated with ultraviolet light or the like.

[0055] A filling layer 8 may be disposed on the light-emitting side of the color filter layer CFL. The filling layer 8 is optically transparent and made of an organic material such as acrylic resin, epoxy resin, or silicone resin. The surface of the filling layer 8 on the light-emitting side is preferably flat. In particular, when a counter substrate (described later) is not provided, the surface of the filling layer 8 on the light-emitting side is preferably flat. A planarization layer may be disposed between the color filter layer CFL and the filling layer 8. Such a planarization layer and the planarization layer 7 that may be disposed between the filling layer 8 and the color filter layer CFL may be made of the same material. The planarization layer disposed between the color filter layer CFL and the filling layer 8 and the filling layer 8 may be in contact with each other outside the display area DA, i.e., at the edge of the display device 10. Using the same material for the planarization layer disposed between the color filter layer CFL and the filling layer 8 and the planarization layer 7 disposed between the filling layer 8 and the color filter layer CFL is advantageous in that high adhesion can be achieved between them.

[0056] An opposing substrate 9 can be disposed on the light-emitting side of the filling layer 8. The opposing substrate 9 is made of a light-transmitting material. The opposing substrate 9 is made of, for example, a glass substrate, a plastic substrate, or the like, and the surface of the light-emitting side of the opposing substrate 9 is preferably flat.

[0057] The organic EL display device 10 can be used as a component of an electronic device. Such an electronic device may include, for example, an imaging unit that captures an image of a subject and an image display unit that displays an image based on an image signal generated based on data output from the imaging unit, and the organic EL display device 10 can be used as the image display unit. The imaging unit may include an image sensor such as a CMOS image sensor or a CCD image sensor. The imaging unit may further include an optical system that forms an optical image of the subject on the imaging plane of the image sensor.

[0058] 10 is a schematic diagram illustrating an example of a display device as an electronic device according to an embodiment. The display device 1000 may include a touch panel 1003, a display panel 1005, a frame 1006, a circuit board 1007, and a battery 1008 between an upper cover 1001 and a lower cover 1009. The organic EL display device 10 described above can be used as the display panel 1005. Flexible printed circuits FPCs 1002 and 1004 are connected to the touch panel 1003 and the display panel 1005. Transistors are printed on the circuit board 1007. The battery 1008 may not be provided if the display device 1000 is not a portable device, and may be provided in a different location even if the display device 1000 is a portable device.

[0059] The organic EL display device 10 may be used as a display unit of a mobile terminal. In this case, the organic EL display device 10 may have both a display function and an operation function. Examples of the mobile terminal include a mobile phone such as a smartphone, a tablet, and a head-mounted display.

[0060] The organic EL display device 10 may be used as a display unit of an imaging device having an optical unit with multiple lenses and an imaging element that captures an optical image formed by the optical unit. The imaging device may have a display unit that displays information acquired by the imaging element. The display unit may be a display unit exposed to the outside of the imaging device or a display unit located within a viewfinder. The imaging device may be a digital camera or a digital video camera.

[0061] 11(a) is a schematic diagram illustrating an example of an imaging device as an electronic device according to an embodiment. The imaging device 1100 may include a viewfinder 1101, a rear display 1102, an operation unit 1103, and a housing 1104. The viewfinder 1101 may include an organic EL display device 10 as a display unit. In this case, the organic EL display device 10 may display not only captured images but also environmental information, imaging instructions, and the like. The environmental information may include the intensity of external light, the direction of external light, the speed at which the subject is moving, the possibility that the subject will be blocked by an obstruction, and the like.

[0062] The imaging device 1100 has an optical section (not shown). The optical section has multiple lenses, which form an image on an imaging element housed in a housing 1104. The focus of the multiple lenses can be adjusted by adjusting their relative positions. This operation can also be performed automatically. The imaging device may also be called a photoelectric conversion device. Instead of sequentially capturing images, the photoelectric conversion device can include an imaging method that detects the difference from the previous image, or a method of cutting out an image from a constantly recorded image, etc.

[0063] FIG. 11(b) is a schematic diagram showing an example of a mobile terminal as an electronic device of an embodiment. The mobile terminal 1200 has a display unit 1201, an operation unit 1202, and a housing 1203. The housing 1203 may have a circuit, a printed circuit board having the circuit, a battery, and a communication unit. The operation unit 1202 may be a button or a touch panel type reaction unit. The operation unit may be a biometric recognition unit that recognizes a fingerprint to perform operations such as unlocking. A mobile terminal having a communication unit can also be called a communication device. The mobile terminal may further have a camera function by including a lens and an image sensor. An image captured by the camera function is displayed on the display unit. Examples of the electronic device include a smartphone and a laptop computer.

[0064] FIG. 12 is a schematic diagram illustrating an example of a display device as an example of an electronic device according to an embodiment. FIG. 12(a) illustrates a display device that can be used as a television monitor, a PC monitor, or the like. The display device 1300 includes a frame 1301 and a display unit 1302. The organic EL display device 10 can be used as the display unit 1302. The display device of FIG. 12(a) can include a base 1303 that supports the frame 1301 and the display unit 1302. The base 1303 is not limited to the form shown in FIG. 2(a), and the lower side of the frame 1301 can also serve as the base. The frame 1301 and the display unit 1302 can also have curved surfaces, and the radius of curvature can be, for example, 5000 mm or more and 6000 mm or less.

[0065] FIG. 12(b) is a schematic diagram illustrating another example of a display device as an electronic device according to an embodiment. The display device 1310 in FIG. 12(b) is configured to be bendable, and is a so-called foldable display device. The display device 1310 has a first display unit 1311, a second display unit 1312, a housing 1313, and a bending point 1314. The organic EL display device 10 can be used as the first display unit 1311 and the second display unit 1312. The first display unit 1311 and the second display unit 1312 may be a single, seamless display unit. The first display unit 1311 and the second display unit 1312 can be separated by the bending point. The first display unit 1311 and the second display unit 1312 may display different images, or the first and second display units may display a single image.

[0066] FIG. 13(a) is a schematic diagram illustrating an example of a lighting device as an electronic device according to an embodiment. The lighting device 1400 may include a housing 1401, a light source 1402, a circuit board 1403, an optical film 1404, and a light diffusion unit 1405. The organic EL display device 10 can be used as the light source. The optical filter may be a filter that improves the color rendering of the light source. The light diffusion unit can effectively diffuse light from the light source, such as for illumination, and deliver the light over a wide area. The optical filter and the light diffusion unit may be provided on the light emission side of the lighting device. If necessary, a cover may be provided on the outermost surface.

[0067] The lighting device is, for example, a device that illuminates a room. The lighting device may emit white, daylight white, or any other color from blue to red. It may have a dimming circuit that dims these colors. The lighting device may have the organic light-emitting element of the present invention and a power supply circuit connected thereto. The power supply circuit is a circuit that converts AC voltage to DC voltage. Furthermore, white has a color temperature of 4200K, and daylight white has a color temperature of 5000K. The lighting device may have a color filter. The lighting device may also have a heat dissipation unit. The heat dissipation unit dissipates heat from within the device to the outside of the device, and examples of the heat dissipation unit include metals with high specific heat, liquid silicon, etc.

[0068] FIG. 13(b) is a schematic diagram of an automobile, which is an example of a moving body according to an embodiment. The automobile has a tail lamp, which is an example of a lighting device. The automobile 1500 has a tail lamp 1501, and may be configured to turn on the tail lamp when braking or the like is performed. The organic EL display device 10 can be used as the tail lamp 1501. The tail lamp may have a protective member that protects the organic EL element. The protective member may be made of any material as long as it has a certain degree of strength and is transparent, but is preferably made of polycarbonate or the like. Polycarbonate may be mixed with a furandicarboxylic acid derivative, an acrylonitrile derivative, or the like.

[0069] The automobile 1500 may have a body 1503 and a window 1502 attached thereto. The window may be a transparent display as long as it is not a window for checking the front and rear of the automobile. The organic EL display device 10 can be used as the transparent display. In this case, the constituent materials of the electrodes and the like of the organic EL display device 10 are made of transparent materials.

[0070] The moving body may be a ship, an aircraft, a drone, or the like. The moving body may have a body and a lighting device provided on the body. The lighting device may emit light to indicate the position of the body. The lighting device has the organic light-emitting element according to this embodiment.

[0071] An example of an electronic device according to an embodiment will be described with reference to Fig. 14. The electronic device may be a wearable device such as smart glasses, an HMD, or a smart contact lens. An organic EL display device 10 can be used as a display unit of such an electronic device.

[0072] 14(A) shows an example of glasses 1400 (smart glasses) as an electronic device. An imaging device 1402 such as a CMOS sensor or a SPAD is provided on the front side of a lens 1401 of the glasses 1400. A display unit is provided on the back side of the lens 1401. An organic EL display device 10 can be used as the display unit.

[0073] The glasses 1400 may further include a control device 1403. The control device 1403 functions as a power source that supplies power to the image capture device 1402 and the display device according to each embodiment. The control device 1403 also controls the operations of the image capture device 1402 and the display device. The lens 1401 is formed with an optical system for focusing light onto the image capture device 1402.

[0074] FIG. 14B shows another example of glasses 1400 (smart glasses) as an electronic device. The glasses 1410 include a control device 1412, which is equipped with an imaging device and a display device. The display device can be an organic EL display device 10. A lens 1411 includes an imaging device within the control device 4312 and an optical system for projecting light emitted from the display device, and an image is projected onto the lens 1411. The control device 1412 functions as a power source that supplies power to the imaging device and the display device and controls the operation of the imaging device and the display device. The control device 1412 may also include a gaze detection unit that detects the wearer's gaze. Infrared light may be used for gaze detection. The infrared light emitter emits infrared light toward the eyeball of a user gazing at a displayed image. An imaging unit with a light-receiving element detects the reflected light of the emitted infrared light from the eyeball, thereby obtaining an image of the eyeball. A reduction unit that reduces light from the infrared light emitter to the display unit in a planar view reduces degradation of image quality.

[0075] The user's line of sight with respect to the displayed image is detected from an image of the eyeball obtained by capturing infrared light. Any known method can be applied to gaze detection using an image of the eyeball. As an example, a gaze detection method based on a Purkinje image formed by reflection of irradiated light on the cornea can be used. More specifically, gaze detection processing is performed based on the pupil-corneal reflex method. Using the pupil-corneal reflex method, a gaze vector representing the direction (rotation angle) of the eyeball is calculated based on the image of the pupil and the Purkinje image contained in the image of the eyeball, thereby detecting the user's gaze.

[0076] A display device according to an embodiment may include an imaging device having a light receiving element, and may control a display image based on user line-of-sight information from the imaging device. Specifically, the display device may determine a first field of view area where the user gazes and a second field of view area other than the first field of view area based on the line-of-sight information. The first field of view area and the second field of view area may be determined by a control device of the display device, or may be determined by an external control device and received. In the display area of ​​the display device, the display resolution of the first field of view area may be controlled to be higher than the display resolution of the second field of view area. In other words, the resolution of the second field of view area may be lower than that of the first field of view area.

[0077] The display area includes a first display area and a second display area different from the first display area, and a high-priority area is determined from the first display area and the second display area based on line-of-sight information. The first field of view area and the second field of view area may be determined by a control device of the display device, or may be determined by an external control device and received. The resolution of the high-priority area may be controlled to be higher than the resolution of areas other than the high-priority area. In other words, the resolution of an area with a relatively low priority may be lowered.

[0078] Note that AI may be used to determine the first field of view area and areas with high priority. The AI ​​may be a model configured to estimate the angle of gaze and the distance to an object in the line of sight from an image of the eyeball, using as training data an image of the eyeball and the direction in which the eyeball in the image was actually looking. The AI ​​program may be included in the display device, the imaging device, or an external device. If included in an external device, it is transmitted to the display device via communication.

[0079] When display control is performed based on visual recognition detection, the smart glasses can be preferably applied to smart glasses that further include an imaging device for capturing images of the outside world. The smart glasses can display captured external information in real time.

[0080] As described above, by using a device using the organic light-emitting element according to this embodiment, it is possible to provide a stable display with good image quality even over a long period of time.

[0081] Several examples will be described below. Example 1 A display device having the configuration shown in Figure 6 was fabricated as follows. First, aluminum was formed on a substrate 1, and then patterned to form lower electrodes 2 for the first, second, and third light-emitting elements. Next, an insulating layer 5 was formed between the lower electrodes 2. The insulating layer 5 was made of silicon oxide. The thickness of the insulating layer 5 was 65 nm. Openings were formed in the insulating layer 5 of each light-emitting element to form the first, second, and third light-emitting regions. The widths of the openings in the first, second, and third light-emitting regions at the center and periphery of the display area were all 3.8 μm.

[0082] Next, an organic compound layer was formed on the lower electrode 2. Specifically, the following compound 1 was formed to a thickness of 3 nm as a hole injection layer. Next, the following compound 2 was formed to a thickness of 15 nm as a hole transport layer, and the following compound 3 was formed to a thickness of 10 nm as an electron blocking layer.

[0083] The first light-emitting layer was formed to a thickness of 10 nm, containing 97% by weight of the following compound 4 as a host material and 3% by weight of the following compound 5 as a light-emitting dopant. The second light-emitting layer was formed to a thickness of 10 nm, containing 98% by weight of the following compound 4 as a host material and 1% by weight of each of the following compounds 56 and 67 as light-emitting dopants. The electron transport layer was formed to a thickness of 110 nm using the following compound 8. The electron injection layer was formed to a thickness of 1 nm using lithium fluoride.

[0084] [ka]

[0085] Next, an MgAg alloy was formed to a thickness of 10 nm as the upper electrode 4. The ratio of Mg to Ag was 1:1. After that, a SiN film was formed to a thickness of 2 μm by CVD as the protective layer 6. Furthermore, a planarization layer 7 was formed to a thickness of 300 nm on the SiN film by spin coating.

[0086] Next, a color filter layer CFL was formed on the planarizing layer 7. The first color filter was a color filter that transmits a blue component, the second color filter was a color filter that transmits a red component, and the third color filter was a color filter that transmits a green component.

[0087] In the first pixel at the center of the display area, the first color filter and the second color filter were formed as a first light-shielding region so as to overlap in a planar view, with the overlap amount being 0.1 μm. Furthermore, the first color filter and the third color filter were formed as a first light-shielding region so as to overlap in a planar view, with the overlap amount being 0.1 μm. The size of the opening of the first color filter (opening of the first light-emitting element) in the first pixel at the center of the display area was 5.0 μm, and the ratio of the size of the opening of the first color filter to the size of the first light-emitting region of the first pixel at the center was 1.32.

[0088] In the second pixel on the periphery of the display area, the first light-shielding region was formed so that the edges of the first and second color filters overlapped each other in a plan view, with the overlap amount being 0.4 μm.Furthermore, the first light-shielding region was formed so that the edges of the first and third color filters overlapped each other in a plan view, with the overlap amount being 0.4 μm.

[0089] The size of the opening of the first color filter (opening of the first light-emitting element) in the second pixel in the peripheral part of the display area was 4.4 μm, and the ratio of the size of the opening of the first light-shielding area to the size of the first light-emitting area of ​​the second pixel in the peripheral part was 1.16.

[0090] As a result, in Example 1, a display device was fabricated in which the ratio of the size of the opening of the first color filter (the opening of the first light-emitting element) to the size of the light-emitting area of ​​the first light-emitting element was smaller for the second pixel located in the periphery than for the first pixel located in the center.This configuration was confirmed to have the effect of reducing the chromaticity difference between pixels.In addition, it was confirmed that this configuration reduces power consumption. Example 2 In Example 2, a display device was fabricated in the same manner as in Example 1, except for the color filter and the first light-shielding region.

[0091] A black resin material was formed on the planarization layer as a first light-shielding region. The black resin material was formed on the first light-emitting element side at both the boundary between the first and second light-emitting elements and the boundary between the first and third light-emitting elements. In the first pixel in the center of the display region, the width (size) of the black resin material was set to 0.1 μm. As a result, in the first pixel in the center of the display region, the size of the opening of the first color filter to be formed later was set to 5.0 μm, and the ratio of the size of the opening of the first color filter (opening of the first light-emitting element) to the size of the first light-emitting region was set to 1.32.

[0092] In the second pixel on the periphery of the display area, the width (size) of the black resin material was set to 0.4 μm, which resulted in the size of the opening of the first color filter (opening of the first light-emitting element) to be formed later being set to 4.4 μm, and the ratio of the size of the opening of the first color filter to the size of the first light-emitting area being set to 1.16.

[0093] A first color filter, a second color filter, and a third color filter were formed on a black resin material. In the central and peripheral portions of the display area, the first color filter and the second color filter were formed to overlap each other in a planar view, with an overlap amount of 0.1 μm. Furthermore, the first color filter and the third color filter were formed to overlap each other in a planar view, with an overlap amount of 0.1 μm.

[0094] As a result, in Example 2, a display device was fabricated in which the ratio of the size of the opening of the first color filter (the opening of the first light-emitting element) to the size of the light-emitting area of ​​the first light-emitting element was smaller for the second pixel located in the periphery than for the first pixel located in the center.This configuration was confirmed to have the effect of reducing the chromaticity difference between pixels.In addition, it was confirmed that this configuration reduces power consumption. Example 3 In Example 3, a display device was fabricated in the same manner as in Example 1, except for the first light-emitting region and the first light-shielding region.

[0095] In the first pixel in the center of the display area, the opening width (size) of the first light-emitting region was 3.5 μm. The opening widths of the second and third light-emitting regions in the center were all 3.8 μm. In the second pixel on the periphery of the display area, the opening widths of the first, second, and third light-emitting regions were all 3.8 μm.

[0096] Regarding the color filters, the first and second color filters were formed to overlap each other in a planar view at the center and periphery of the display area, with the overlap amount set to 0.1 μm. Furthermore, the first and third color filters were formed to overlap each other in a planar view, with the overlap amount set to 0.1 μm. The size of the opening of the first color filter in the center and periphery of the display area was set to 4.4 μm.

[0097] In the first pixel at the center of the display area, the ratio of the size of the opening of the first color filter (opening of the first light-emitting element) to the size of the first light-emitting area was 1.26. In the second pixel at the periphery of the display area, the ratio of the size of the opening of the first color filter (opening of the first light-emitting element) to the size of the first light-emitting area was 1.16.

[0098] As a result, in Example 3, a display device was fabricated in which the ratio of the size of the opening of the first color filter (the opening of the first light-emitting element) to the size of the light-emitting area of ​​the first light-emitting element was smaller for the second pixel located in the periphery than for the first pixel located in the center.This configuration was confirmed to have the effect of reducing the chromaticity difference between pixels.In addition, it was confirmed that this configuration reduces power consumption.

[0099] The invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention. Accordingly, the following claims are appended to apprise the public of the scope of the invention. [Explanation of symbols]

[0100] DA: display area, P1: first pixel, P3: second pixel, CFL: color filter layer, 103a: opening, 103b: opening, 104a: light-shielding area, 104b: light-shielding area, 101: color filter, 201: color filter, 301: color filter

Claims

1. 1. A display device having a display area, the display area including a central portion and a peripheral portion between the central portion and an edge of the display area; a first pixel is arranged in the central portion, a second pixel is arranged in the peripheral portion, each of the first pixel and the second pixel includes a first light-emitting element and a second light-emitting element, and a color filter layer made of a color filter material is arranged on the first light-emitting element and the second light-emitting element; the first light-emitting element includes a first color filter disposed on the color filter layer; the second light-emitting element includes a second color filter disposed on the color filter layer and having a spectral transmittance characteristic different from that of the first color filter; the openings of the first light-emitting element and the second light-emitting element are defined by the color filter layer; a difference between a size of the opening of the first light-emitting element in the first pixel and a size of the opening of the first light-emitting element in the second pixel is larger than a difference between a size of the opening of the second light-emitting element in the first pixel and a size of the opening of the second light-emitting element in the second pixel, the opening is defined by a light-shielding region formed by an overlap between the first color filter and the second color filter, The size of the light-blocking region of the second pixel is larger than that of the first pixel. A display device characterized by:

2. The size of the opening of the first light-emitting element in the second pixel is a size smaller than the size of the opening of the first light-emitting element; 2. The display device according to claim 1.

3. a difference between the size of the opening of the first light-emitting element of the first pixel and the size of the opening of the first light-emitting element of the second pixel is larger than a difference between the size of the light-emitting region of the first light-emitting element of the first pixel and the size of the light-emitting region of the first light-emitting element of the second pixel; 3. The display device according to claim 2.

4. The size of the light-emitting region of the first light-emitting element is equal to the size of the light-emitting region of the second light-emitting element.

4. The display device according to claim 3.

5. the color filter layer includes a light-absorbing material, and the opening is defined by a light-shielding region formed by an overlap of the first color filter and the light-absorbing material; The size of the light-blocking region of the second pixel is larger than that of the first pixel.

5. The display device according to claim 1, wherein the first and second electrodes are electrically connected to each other.

6. Each of the first pixel and the second pixel further includes a third light-emitting element, the third light-emitting element includes a third light-emitting region and a third color filter disposed on the color filter layer and having spectral transmittance characteristics different from those of the first color filter and the second color filter; 5. The display device according to claim 1, wherein the first and second electrodes are electrically connected to each other.

7. the first light emitting element includes a lower electrode, a light emitting layer, and an upper electrode; The transmittance peak wavelength of the first color filter is given by the following formula: 2L / (m-φ / 2π) ×0.85 ≦ λ ≦ 2L / (m-φ / 2π) ×1.15 where m is an integer equal to or greater than 0, φ is a phase shift in the lower electrode, λ is a transmittance peak wavelength of the first color filter, and L is an optical distance from the light-emitting layer to the lower electrode.

7. The display device according to claim 1, wherein the first and second electrodes are electrically connected to each other.

8. The first color filter is a blue color filter.

8. The display device according to claim 7,

9. 1. A display device having a display area, the display area including a central portion and a peripheral portion between the central portion and an edge of the display area; a first pixel is arranged in the central portion, a second pixel is arranged in the peripheral portion, each of the first pixel and the second pixel includes a first light-emitting element and a second light-emitting element, and a color filter layer made of a color filter material is arranged on the first light-emitting element and the second light-emitting element; the first light-emitting element includes a first color filter disposed on the color filter layer; the second light-emitting element includes a second color filter disposed on the color filter layer and having a spectral transmittance characteristic different from that of the first color filter; the openings of the first light-emitting element and the second light-emitting element are defined by the color filter layer; a difference between a size of the opening of the first light-emitting element in the first pixel and a size of the opening of the first light-emitting element in the second pixel is larger than a difference between a size of the opening of the second light-emitting element in the first pixel and a size of the opening of the second light-emitting element in the second pixel, the first light emitting element includes a lower electrode, a light emitting layer, and an upper electrode; The transmittance peak wavelength of the first color filter is given by the following formula: 2L / (m-φ / 2π) ×0.85 ≦ λ ≦ 2L / (m-φ / 2π) ×1.15 where m is an integer equal to or greater than 0, φ is a phase shift in the lower electrode, λ is a transmittance peak wavelength of the first color filter, and L is an optical distance from the light-emitting layer to the lower electrode. A display device characterized by:

10. In the second pixel, a center of a light-emitting region of the first light-emitting element and a center of the opening are offset from each other in a plan view.

10. The display device according to claim 1, wherein the first and second electrodes are electrically connected to each other.

11. an imaging unit that captures an image of a subject; The display device according to any one of claims 1 to 10, configured to display an image based on an image signal generated based on data output from the imaging unit; An electronic device comprising:

12. an imaging unit that captures an image of a subject; The display device according to any one of claims 1 to 10, configured to display an image based on an image signal generated based on data output from the imaging unit; A moving object comprising:

Images