Display device, electronic device, and moving body

Abstract

A display device, an electronic device, and a moving body are provided. The display device has a display region having a plurality of pixels including a first pixel disposed in a central portion of the display region and a second pixel disposed between the first pixel and an edge of the display region. Each pixel includes a first light emitting element and a second light emitting element. A color filter layer is disposed on the first light emitting element and the second light emitting element. The first light emitting element includes a first color filter, and an opening of the first light emitting element is defined by the color filter layer. The second light emitting element includes a second color filter having a spectral transmittance characteristic different from that of the first color filter. A ratio of a size of the opening to a size of a light emitting region of the first light emitting element is smaller in the second pixel than in the first pixel.

Description

Technical Field

[0001] This invention relates to display devices, electronic devices, and mobile bodies. Background Technology

[0002] Organic EL elements are light-emitting elements comprising a pair of electrodes and an organic compound layer disposed between them, including a light-emitting layer. Utilizing excellent properties such as surface-emitting characteristics, light weight, and visibility, organic EL elements have been practically used in light-emitting devices for flat panel displays, lighting fixtures, head-mounted displays, and printhead light sources in electrophotographic printers. In particular, the demand for high-resolution organic EL display devices is increasing, and a method using white organic EL elements and color filters (hereinafter referred to as the white / CF method) is known. The white / CF method involves mounting multiple color filters with different wavelength dependencies on the light to be absorbed in the emission direction of the white light emitted by the organic EL element. For example, when the color filters are formed such that the emitted color after passing through the color filters becomes red, green, and blue, full-color display can be achieved through additive color mixing. Since it is not necessary to deposit an organic compound layer for each light-emitting pixel in the white / CF method, high-resolution light-emitting pixels can be easily formed.

[0003] Figure 9 An example of an organic EL display device 10 used in conjunction with a magnifying optical system 20 is shown. The dashed lines indicate the light beam emitted from the display area 11 of the organic EL display device 10 and entering the eye 30 via the magnifying optical system. Regarding the central portion of the display area 11, a light beam emitted along the normal direction of the display area 11 is used. Regarding the peripheral portion of the display area 11, a light beam emitted in an oblique direction (a direction oblique to the normal direction) is used.

[0004] When observing an organic EL display device using the white / CF method via a magnifying optical system, a chromaticity inhomogeneity problem arises where the central portion and the periphery of the display area 11 exhibit different chromaticities. This problem stems from the fact that the colors of the light beam emitted from the central portion of the display area 11 along the normal direction and the light beam emitted from the periphery of the display area 11 along the oblique direction are different. As a contributing factor, the intensity ratio of the red, green, and blue components of white light differs between the normal and oblique directions before passing through the color filter. In this case, the luminous intensity ratio of the red, green, and blue sub-pixels also changes after passing through the color filter. Therefore, for example, similar to a white display, the chromaticity differs between the frontal and oblique directions in the light synthesized from the light components of red, green, and blue pixels.

[0005] Journal SID 26 / 3, 2018 p.178 (hereinafter referred to as NPTL 1) discloses an organic EL display device that suppresses chromaticity variations in the tilt direction by adjusting the size of the color filter for each color and narrowing the substantial aperture ratio of the color filter.

[0006] The display device described in NPTL 1 uses a method that narrows the substantial aperture ratio of the color filters by adjusting the size of the color filters for each color. When using this method, the difference between the chromaticity in the tilt direction and the chromaticity in the front direction can be reduced. However, since the substantial aperture ratio used to extract the emitted light is reduced, the light extraction efficiency is reduced compared to the state before the color filter size adjustment, and the power consumption required to obtain the same brightness is increased. Summary of the Invention

[0007] A first aspect of the present invention provides a display device comprising a display area having a plurality of pixels, wherein the plurality of pixels includes a first pixel disposed in the center of the display area and a second pixel disposed between the first pixel and an edge of the display area, each of the plurality of pixels including a first light-emitting element and a second light-emitting element, and a color filter layer made of a color filter material is disposed on the first light-emitting element and the second light-emitting element, the first light-emitting element including a first color filter disposed in the color filter layer, and an opening of the first light-emitting element being defined by the color filter layer, and the second light-emitting element including a second color filter disposed in the color filter layer and having a spectral transmittance characteristic different from that of the first color filter, and the ratio of the size of the opening to the size of the light-emitting area of ​​the first light-emitting element is smaller in the second pixel than in the first pixel.

[0008] A second aspect of the invention provides an electronic device comprising: a camera unit configured to photograph a subject; and a display device defined by the first aspect, configured to display an image based on an image signal generated based on data output from the camera unit.

[0009] A third aspect of the invention provides a mobile body comprising: a camera unit configured to photograph a subject; and a display device defined by the first aspect configured to display an image based on an image signal generated based on data output from the camera unit. Attached Figure Description

[0010] Figure 1 It is a diagram showing the first and second pixels in the display area of ​​the display device;

[0011] Figures 2A to 2C It is a graph showing the relationship between the emission angle and chromaticity of light from the luminous region;

[0012] Figure 3 This is a schematic cross-sectional view of the first comparative example;

[0013] Figure 4 This is a schematic cross-sectional view of the second comparative example;

[0014] Figure 5 It is a graph showing the spectral transmittance characteristics of the red, green, and blue color filters;

[0015] Figure 6 It is a cross-sectional view schematically showing the cross-sectional structure of the first pixel and the second pixel arranged in the display area of ​​the display device according to the embodiment;

[0016] Figure 7 This is a schematic diagram illustrating the planar structure of the first and second pixels arranged in the display area of ​​the display device according to an embodiment;

[0017] Figure 8 This is a cross-sectional view schematically showing the cross-sectional structure of a first pixel and a second pixel disposed in the display area of ​​a display device according to another embodiment;

[0018] Figure 9 This is a diagram illustrating an example of a display device used with a magnifying optical system;

[0019] Figure 10 This is a diagram showing a display device as an electronic device according to an embodiment;

[0020] Figure 11A and Figure 11B The figures all show a display device as an electronic device according to an embodiment;

[0021] Figure 12A and Figure 12B The figures all show a display device as an electronic device according to an embodiment;

[0022] Figure 13A and Figure 13B These are diagrams showing the lighting device and the movable body according to the embodiments; and

[0023] Figure 14A and Figure 14B The figures show a display device as an electronic device according to an embodiment. Detailed Implementation

[0024] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. It should be noted that the following embodiments are not intended to limit the scope of the appended claims. Several features are illustrated in the embodiments, and not all of these features are essential to the invention. Furthermore, the features can be combined arbitrarily. In addition, in all the drawings, the same reference numerals denote the same or similar parts, and repeated descriptions will be omitted.

[0025] Figure 1 A schematic plan view (plan view) of the display area DA of the organic EL display device 10 according to this embodiment is shown. 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 central portion of the display area DA, and the second pixel P2 is a main pixel arranged between the first pixel P1 and the edge ED (e.g., peripheral portion) of the display area DA. Each pixel (main pixel) includes a plurality of sub-pixels (organic EL light-emitting elements). Alternatively, the first pixel P1 can be described as being included in a first region that serves as a main pixel portion, and the second pixel P2 as being included in a second region surrounding the first region.

[0026] Reference Figures 2A to 2C This example illustrates the relationship between the exit angle of light from the emitting region and its chromaticity. Figure 2A The diagram schematically illustrates white light emitted from the luminous region ER of the first pixel P1 at an emission angle (θ) = 0° (normal direction). Figure 2B The diagram schematically illustrates white light emitted from the luminous region ER of the second pixel P2 at an emission angle (θ) = 40° (tilt direction). Figure 2C The results show the results of normalizing the peak intensities of the red (580nm to 780nm) and blue (400nm to 490nm) components included in white light according to the peak intensities of the green component (from 490nm to 580nm). It is evident that the intensity ratios of the red, green, and blue components (hereinafter referred to as the color component ratios) differ between the normal and tilt directions. This indicates that the observed colors of the luminous region ER are different when viewed from a point in the normal direction and when viewed from a point in the tilt direction; that is, their chromaticities differ. The chromaticity of the light synthesized from the transmitted light components (i.e., the red, green, and blue components) produced by white light emitted from the luminous region ER and passing through the red, green, and blue filters also differs between the normal and tilt directions. Figure 2C The example shows that if the light observed in the normal direction is white light, then the blue component is stronger in the light observed in the tilt direction.

[0027] The problem will now be illustrated using the first and second comparative examples, followed by an explanation of the implementation methods for solving the problem. Figure 3 The cross-sectional structure of a first pixel (first main pixel) P1 and a second pixel (second main pixel) P2 disposed in the display area DA of the organic EL display device 10 according to the first comparative example is schematically shown. The first pixel P1 is a main pixel disposed in the central part of the display area DA, and the second pixel P2 is a main pixel disposed between the first pixel P1 and the edge ED (e.g., peripheral part) of the display area DA. Each of the main pixels P1 and P2 may include 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 as three sub-pixels.

[0028] 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 facing 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 facing 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 facing substrate 9. The upper electrode 4, protective layer 6, planarization layer 7, filling layer 8, and facing substrate 9 may be shared by 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 allows the blue component to pass through. The second light-emitting element 200 is a red light-emitting element, and the second color filter 201 allows the red component to pass through. The third light-emitting element 300 is a green light-emitting element, and the third color filter 301 allows the green component to pass through. Color filters 101, 201, and 301 are color filters with different spectral transmittance characteristics.

[0029] exist Figure 3 For convenience, only dashed arrows are used to indicate the light emitted from the first light-emitting element 100. In the organic EL display device 10 according to the first comparative example, no light-shielding area is provided. Therefore, after passing through the blue color filter 101, the red color filter 201, and the green color filter 301, the color component ratio between the blue light component, the red light component, and the green light component remains the same as the color component ratio in the white light before passing through the color filters 101, 201, and 301. For example, it is assumed that the white light before passing through the color filters 101, 201, and 301 has… Figure 2CThe light exhibiting the characteristics shown is white light, and the light synthesized from the red, green, and blue light components emitted along the normal direction from the first pixel P1 and passing through color filters 101, 201, and 301 is white light. In this case, the light synthesized from the red, green, and blue light components emitted along the oblique direction from the second pixel P2 and passing through color filters 101, 201, and 301 is light containing a strong blue component.

[0030] Figure 4 The cross-sectional structure of a first pixel (first main pixel) P1 and a second pixel (second main pixel) P2 configured in the display device DA of the organic EL display device 10 according to the second comparative example is schematically shown. The second comparative example has a configuration formed by adding a light-shielding region 104 to the first comparative example. The light-shielding region 104 defines an opening 103 for a first light-emitting element 100 for blue light. In other words, the light-shielding region 104 limits the amount of light allowed to pass through from the first light-emitting element 100 for blue light. 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 the overlap of the first color filter 101 and the second color filter 201. The light-shielding region 104 is also formed by the overlap of the first color filter 101 and the third color filter 301.

[0031] In this specification, dimensions can be, for example, one-dimensional or two-dimensional dimensions (e.g., area). Furthermore, in this specification, an opening in a light-emitting element refers to a portion used to define the amount of light allowed to pass through the light-emitting area of ​​the light-emitting element. The opening in a light-emitting element can be an area where a color filter and a light-blocking area disposed within the light-emitting element do not overlap in a plan view.

[0032] Figure 5 The spectral transmittance characteristics of color filters 101, 201, and 301 are shown. The first color filter 101 is a blue color filter, i.e., configured to allow the blue component to pass through. The second color filter 201 is a red color filter, i.e., configured to allow the red component to pass through. The third color filter 301 is a green color filter, i.e., configured to allow the green component to pass through. From... Figure 5 It can be seen that light-blocking characteristics (attenuation characteristics caused by light absorption) can be obtained by overlapping the first color filter 101 and the second color filter 201. Furthermore, from... Figure 5 It can be seen that by overlapping the first color filter 101 and the third color filter 301, light-blocking characteristics (attenuation characteristics caused by light absorption) can be obtained.

[0033] In the second comparative example, by providing the light-shielding region 104, the blue component in the light emitted from the first blue-emitting element 100 in the second pixel P2 along the oblique direction can be reduced. However, in the second comparative example, since the light-shielding regions 104 of the first pixel P1 and the second pixel P2 have the same configuration, the blue component in the light emitted from the first blue-emitting element 100 in the first pixel P1 along the normal direction is also reduced by the light-shielding region 104. Therefore, the efficiency of the first blue-emitting element 100 disposed in the central portion of the first pixel P1 is reduced. This means that the power consumption required to obtain the desired brightness increases.

[0034] The organic EL display device 10 according to the embodiment will now be described. Figure 6 and Figure 7 The cross-sectional and planar structures of a first pixel (first main pixel) P1 and a second pixel (second main pixel) P2 disposed in the display area DA of an organic EL display device 10 according to an embodiment are schematically shown. The first pixel P1 is a main pixel disposed in the central portion of the display area DA, and the second pixel P2 is a main pixel disposed between the first pixel P1 and the edge ED (e.g., peripheral portion) of the display area DA. Each of the main pixels P1 and P2 may include a first light-emitting element 100, a second light-emitting element 200, and a third light-emitting element 300 as three sub-pixels. A color filter layer CFL made of color filter material is disposed on the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300.

[0035] 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 facing substrate 9 disposed on the substrate 1. The second light-emitting element 200 may include the 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 facing substrate 9 disposed on the substrate 1. The third light-emitting element 300 may include the 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 facing substrate 9 disposed on the substrate 1. The upper electrode 4, the protective layer 6, the planarization layer 7, the filling layer 8, and the facing substrate 9 may be shared by light-emitting elements 100, 200, and 300 (or multiple main pixels).

[0036] The first light-emitting element 100 includes a first light-emitting region 102. Here, the first light-emitting region 102 of the first light-emitting element 100 of the first pixel P1 will be defined 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 defined as the first light-emitting region 102b, and they will be described differently as needed. The first light-emitting region 102 may be a region formed by projecting the region of the first light-emitting element 100 emitting light onto the upper surface of the substrate 1. The second light-emitting element 200 includes a second light-emitting region 202. The second light-emitting region 202 may be a region formed by projecting the region of the second light-emitting element 200 emitting light onto the upper surface of the substrate 1. The third light-emitting element 300 includes a third light-emitting region 302. The third light-emitting region 302 may be a region formed by projecting the region of the third light-emitting element 300 emitting light onto the upper surface of the substrate 1.

[0037] A first color filter 101, a second color filter 201, and a third color filter 301 are disposed in a color filter layer CFL. In another view, the first color filter 101, the second color filter 201, and the third color filter 301 constitute a color filter layer CFL. The color filter layer CFL can be constructed without a reflective film such as a metal film. Furthermore, the color filter layer CFL can be constructed without contacting a reflective film such as a metal film. Since such a reflective film can cause a chromatic shift, it is not preferable to dispose of the reflective film in the color filter layer CFL or to dispose of the reflective film in contact with the color filter layer CFL.

[0038] The first light-emitting element 100 is a blue light-emitting element, and the first color filter 101 allows the blue component to pass through. The second light-emitting element 200 is a red light-emitting element, and the second color filter 201 allows the red component to pass through. The third light-emitting element 300 is a green light-emitting element, and the third color filter 301 allows the green component to pass through. Color filters 101, 201, and 301 are color filters with different spectral transmittance characteristics, and for example, can have the following characteristics: Figure 5 The spectral transmittance is shown.

[0039] In this embodiment, the first pixel P1 may include a first light-shielding region 104a, and the second pixel P2 may include a second light-shielding region 104b. The first light-shielding region 104a defines the opening 103a of the first light-emitting element 100 of the first pixel P1, and the second light-shielding region 104b defines the opening 103b of the first light-emitting element 100 of the second pixel P2. The first light-shielding region 104a can limit the amount of light allowed to pass through the first light-emitting element 100 of the first pixel P1, and the second light-shielding region 104b can limit the amount of light allowed to pass through the first light-emitting element 100 of the second pixel P2. In the second pixel P2, the center of the first light-emitting region 102b and the center of the opening 103b of the first light-emitting element 100 may be offset from each other in a planar view.

[0040] The first light-blocking region 104a and the second light-blocking region 104b can be defined such that the size of the first light-blocking region 104a is smaller than the size of the second light-blocking region 104b. Therefore, the first pixel P1 and the second pixel P2 have different configurations. The first light-blocking region 104a can be formed by overlapping the first color filter 101 and the second color filter 201 in the first pixel P1, and by overlapping the first color filter 101 and the third color filter 301 in the first pixel P1. The second light-blocking region 104b can be formed by overlapping the first color filter 101 and the second color filter 201 in the second pixel P2, and by overlapping the first color filter 101 and the third color filter 301 in the second pixel P2.

[0041] In this embodiment, the ratio of the size of the opening 103a or 103b to the size of the first light-emitting region 102a or 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 less than the ratio of the size of the opening 103a of the first pixel P1 to the size of the first light-emitting region 102a of the first pixel P1. Note that 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). Furthermore, the ratio of the size of the opening 103a of the first pixel P1 to the size of the first light-emitting region 102a 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).

[0042] According to this embodiment, as in the second comparative example, the blue component in the light emitted from the first blue-emitting element 100 in the second pixel P2 along the oblique direction can be reduced by providing a light-shielding region 104b in the second pixel P2. Furthermore, according to this embodiment, the ratio of the size of the opening 103a or 103b to the size of the first light-emitting region 102a or 102b in the second pixel P2 is smaller than that in the first pixel P1. This can suppress the attenuation of light emitted from the first blue-emitting element 100 in the first pixel P1 along the normal direction. Compared to the second comparative example, this can suppress the power consumption required to obtain the desired brightness. That is, according to this embodiment, the chromaticity difference between pixels can be reduced, and power consumption can also be reduced.

[0043] The ratio of the size of the light-emitting element's opening to the size of the first light-emitting area can be configured such that the size of the opening 103b of the second pixel P2 is smaller than the size of the opening 103a of the first pixel P1. For example, the light-blocking area 104b of the second pixel P2 can be larger than the light-blocking area 104a of the first pixel P1. Figure 6 and Figure 7 This configuration is illustrated. The difference between the size of the opening 103a of the first light-emitting element 100 of the first pixel P1 and the size of the opening 103b of the first light-emitting element 100 of the second pixel P2 can be greater than the difference between the size of the first light-emitting region 102a of the first pixel P1 and the size of 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 equal to the size of the first light-emitting region 102b of the second pixel P2.

[0044] The configuration where the ratio of the opening size of the light-emitting element to the size of the first light-emitting area is smaller in the second pixel P2 than in the first pixel P1 can be implemented by configuring the size of the light-emitting area 102b of the first light-emitting element in the second pixel P2 to be larger than the size of the light-emitting area 102a of the first light-emitting element in the first pixel P1. Such a configuration... Figure 8 As shown in the figure, the difference between the size of the light-emitting region 102b of the first light-emitting element 100 of the second pixel P2 and the size of the light-emitting region 102a of the first light-emitting element 100 of the first pixel P1 can be greater than the difference between the size of the opening 103a of the first pixel P1 and the size of the opening 103b of the second pixel P2. Alternatively, the size of the opening 103a of the first pixel P1 can be equal to the size of the opening 103b of the second pixel P2.

[0045] In the above embodiments, an example has been described of forming light-shielding regions 104a and 104b by overlapping color filters having different spectral transmittance characteristics. However, this is only one embodiment, and light-shielding regions 104a and 104b can also be formed by overlapping a color filter 101 and a light-absorbing material such as a black matrix. The light-absorbing material can be a material that absorbs at least the blue component.

[0046] The above embodiments primarily focused on suppressing the blue component in the tilt direction. However, the present invention is not limited to this, and the pixel configuration can be adjusted based on the above description according to the pixel's position in the display area to suppress other frequency components.

[0047] The above implementation has been illustrated by example using two types of pixels (i.e., the first pixel and the second pixel). However, more types of pixels can be provided. For example, the structure of each pixel can be adjusted so that the ratio changes gradually or in stages from the center of the display area to the edge.

[0048] In the above embodiments, a pixel (major pixel) is formed by three sub-pixels. However, the number of sub-pixels forming a pixel can be varied depending on the target color reproduction range. A pixel can be formed by at least two sub-pixels. A pixel can be formed by four sub-pixels. In this case, the four sub-pixels can be sub-pixels representing the red, green, blue, and white components. A pixel can be formed by five or more sub-pixels.

[0049] The configuration of subpixels in each pixel (major pixel) is not limited to a specific form; for example, stripe structures, delta arrangements, or Bayer arrangements are preferred. Figure 7 A plan view of the striped structure is shown.

[0050] The difference in color composition ratio between the normal direction and the tilt direction has been illustrated with reference to Figure 2. Wavelengths where the light intensity in the tilt direction is less likely to be lower than that in the normal direction are specifically wavelengths whose luminous intensity is increased by the optical distance from the emitting layer to the lower electrode and by the phase shift in the lower electrode. Therefore, the transmittance peak wavelength of the first color filter preferably falls within the wavelength range of λ given by the following inequality. Furthermore, the PL spectral peak of the luminescent material contained in the emitting layer also preferably falls within the wavelength range of λ given by the following inequality.

[0051] 2L / (m-φ / 2π)×0.85≤λ≤2L / (m-φ / 2π)×1.15

[0052] Where m is an integer greater than or equal to 0, φ is the phase shift in the lower electrode, λ is the wavelength, and L is the optical distance from the light-emitting layer to the lower electrode.

[0053] Furthermore, the wavelength that increases the luminescence intensity, particularly through the optical distance from the luminescent layer to the lower electrode and the phase shift in the lower electrode, and the peak transmittance wavelength of the first color filter are preferably blue components. The blue component is advantageous in expanding the color reproduction range, and the peak transmittance wavelength of the first color filter preferably falls within the range of 400 nm to 490 nm. That is, the first color filter is preferably a blue color filter.

[0054] The following configuration can be adopted: in the central part of the display area, the center of the first light-emitting area coincides with the center of the opening of the first color filter in the plan view, while in the peripheral part, the center of the first light-emitting area does not coincide with the center of the opening of the first color filter in the plan view.

[0055] The following will provide a detailed example of the constituent elements of the organic EL display device 10 according to this embodiment.

[0056] The material of 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. Preferably, the material of substrate 1 is quartz, glass, plastic, silicon, resin, metal, etc. Switching elements such as transistors, wiring, and interlayer dielectric films (not shown) can be formed on substrate 1.

[0057] 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 insulated from each other. From the viewpoint of luminous efficiency, the lower electrodes 2 can be made of a metallic material with a visible light reflectance of 50% or more. More specifically, the lower electrodes 2 can be made of metals such as Al or Ag, or alloys obtained by adding Si, Cu, Ni, Nd, Ti, etc. to them. The lower electrodes 2 can have a blocking layer on the surface of the light-emitting side. Examples of materials for the blocking layer are metals such as Ti, W, Mo, and Au and their alloys, as well as transparent conductive oxides such as ITO and IZO. To optimize optical interference, the transparent conductive oxides between the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300 can have different film thicknesses.

[0058] The organic compound layer 3 can be configured to span all or some pixels disposed in the display area DA, that is, the organic compound layer 3 is configured in common for those pixels. Considering each pixel, the organic compound layer 3 can be configured to span the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300, that is, the organic compound layer is configured in common for these light-emitting elements. The organic compound layer 3 can be formed, for example, by known techniques such as vapor deposition or spin coating. The organic compound layer 3 can be continuously disposed on all display areas DA. Considering each pixel, the organic compound layer 3 can be continuously disposed in the area where the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300 are disposed.

[0059] The organic compound layer 3 is a layer that includes at least a light-emitting layer and can be formed from multiple layers. Examples of multiple layers are 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 layers made solely of organic compounds and can also contain inorganic compounds. Since the primary light emission occurs in the organic compound, this device can be called an organic EL device.

[0060] In the organic compound layer 3, holes injected from the anode and electrons injected from the cathode recombine in the light-emitting layer, emitting white light. The light-emitting layer can be formed from multiple layers. These layers can contain red, green, and blue luminescent materials, and the luminescent colors are mixed to obtain white light. Furthermore, the light-emitting layer can contain luminescent materials that emit light components with complementary color relationships, such as blue and yellow luminescent materials.

[0061] 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 made of a compound with high electron-donating properties. Compounds with high electron-donating properties may include, for example, metals with high electron-donating properties, alkali metals such as lithium and cesium, and alkaline earth metals such as calcium and barium, and their compounds. The compounds with high electron-donating properties may be organometallic complexes formed by combining such metals with organic compounds. These materials may form a single layer or a mixed layer with organic compounds in the electron transport layer.

[0062] The upper electrode 4 can be configured to span all or some of the pixels disposed in the display area DA, i.e., the upper electrode 4 is configured in common for those pixels. Considering each pixel, the upper electrode 4 can be configured to span the first light-emitting element 100, the second light-emitting element 200, and the third light-emitting element 300, i.e., the upper electrode 4 is configured in common for those light-emitting elements. The upper electrode 4 is translucent. The upper electrode 4 can be made of a semi-translucent material having the property of allowing a portion of the light reaching the surface to pass through and reflecting the remainder of the light (i.e., semi-translucent reflectivity). The upper electrode 4 can be made of a transparent material such as a transparent conductive oxide, a single 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 a semi-translucent material made of an alloy containing these metals. In particular, the semi-translucent material can be an alloy containing magnesium or silver as a main component. If the upper electrode 4 has a preferred transmittance, the upper electrode 4 can have a stacked structure of the above materials. In one example, the lower electrode 2 can be the anode, while the upper electrode 4 can be the cathode. In another example, the lower electrode 2 can be the cathode, while the upper electrode 4 can be the anode.

[0063] 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 configured to, for example, 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 each insulating layer may include an opening that exposes a region inside the end of the lower electrode 2. The insulating layer 5 may define the light-emitting areas 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 area 102, the second light-emitting area 202, and the third light-emitting area 302 may be defined by the shape of the lower electrode 2 itself. The insulating layer 5 may be made of inorganic materials such as silicon nitride (SiN), silicon oxynitride (SiON), or silicon oxide (SiO). Known techniques such as sputtering or chemical vapor deposition (CVD) may be used to form the insulating layer 5. The insulating layer 5 may be made of organic materials such as acrylic resin or polyimide resin.

[0064] The organic EL display device 10 may include a protective layer 6. The protective layer 6 may be configured 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 comprises an inorganic material that is transparent and has very low permeability to external oxygen and water. The protective layer 6 is preferably made of silicon nitride (SiN), silicon oxynitride (SiON), silicon oxide (SiOx), aluminum oxide (Al2O3), titanium oxide (TiO2), etc. The protective layer 6 can be formed by sputtering, chemical vapor deposition (CVD), or atomic layer deposition (ALD). The protective layer 6 may have any form of single layer or stacked layer of the above materials (if the protective layer 6 has sufficient water-blocking properties), or it may have a stacked structure of the above inorganic and organic materials. Known organic compounds (resins / polymers) may be used as organic materials. The protective layer 6 may have irregularities conforming to the shape of the structure formed prior to the protective layer 6. The protective layer 6 may also be referred to as a sealing layer. Even though it is called a sealing layer, the protective layer 6 does not necessarily have the performance of completely sealing the organic EL display device 10.

[0065] The organic EL display device 10 may include a planarization layer 7 located between the protective layer 6 and the color filter layer CFL. The planarization layer 7 is made of a light-transmitting material, and this material can be either inorganic or organic. If the planarization layer 7 is made of a resin material, the unevenness of the light-emitting side of the planarization layer 7 becomes smaller than the unevenness of the protective layer 6. Therefore, the scattered light generated by the unevenness of the protective layer 6 can be reduced. The planarization layer 7 may also be referred to as a coating. The planarization layer 7 may be made, for example, of an organic material such as acrylic resin, epoxy resin, or silicone resin. The planarization layer 7 can be formed by known methods such as coating or polymeric vapor deposition.

[0066] The color filter layer CFL can be formed directly on the protective layer 6 or the planarization layer 7, or the opposing substrate with the color filter layer CFL formed can be bonded to the substrate with the light-emitting elements 100, 200 and 300 formed. In the latter case, bonding can be performed with resin insertion so that no gap is formed between the color filter layer CFL and the light-emitting elements 100, 200 and 300.

[0067] The first color filter 101, the second color filter 201, and the third color filter 301 can be formed by applying a color resist to a base layer such as a planarization layer 7 and patterning it by photolithography. The color resist is made of, for example, a photocurable resin, and the pattern is formed by curing the portion exposed to ultraviolet light or the like.

[0068] The filler layer 8 can be disposed on the light-emitting side of the color filter layer CFL. The filler layer 8 is transparent and is made of an organic material such as acrylic resin, epoxy resin, or silicone resin. The surface of the filler layer 8 on the light-emitting side is preferably flat. In particular, if the opposing substrate described later is not provided, the surface of the filler layer 8 on the light-emitting side is preferably flat. A planarization layer can be disposed between the color filter layer CFL and the filler layer 8. This planarization layer and the planarization layer 7 disposed between the protective layer 6 and the color filter layer CFL can be made of the same material. The filler layer 8 and the planarization layer disposed between the color filter layer CFL and the filler layer 8 can be in contact outside the display area DA (i.e., at the end of the display device 10). It is advantageous to use the same material to make the planarization layer disposed between the color filter layer CFL and the filler layer 8 and the planarization layer 7 disposed between the protective layer 6 and the color filter layer CFL, because they can achieve high adhesion.

[0069] The opposing substrate 9 can be disposed on the light-emitting side of the filling layer 8. The opposing substrate 9 can be made of a material with light-transmitting properties. The opposing substrate 9 is formed, for example, from a glass substrate, a plastic substrate, etc., and the surface of the light-emitting side of the opposing substrate 9 is preferably flat.

[0070] The organic EL display device 10 can be used as a component of an electronic device. Such an electronic device includes, for example, an image-capturing unit that captures a subject and an image display unit that displays an image based on an image signal generated from data output from the image-capturing unit, and the organic EL display device 10 can be used as the image display unit. The image-capturing unit may include an image sensor such as a CMOS image sensor or a CCD image sensor. The image-capturing unit may further include an optical system that forms an optical image of the subject on the imaging surface of the image sensor.

[0071] Figure 10 This 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 display panel 1005 can be an organic EL display device 10 as described above. Flexible printed circuits (FPCs) 1002 and 1004 are connected to the touch panel 1003 and the display panel 1005, respectively. Transistors are printed on the circuit board 1007. If the display device 1000 is not a portable device, the battery 1008 may not be provided, or even if the display device 1000 is a portable device, the battery 1008 may be placed in another location.

[0072] The OLED display device 10 can be used as a display unit for a portable terminal. In this case, the OLED display device 10 can have both display and operation functions. Examples of portable terminals include mobile phones such as smartphones, tablet computers, and head-mounted display devices.

[0073] Figure 11A This is a schematic diagram illustrating an example of a camera device as an electronic device according to an embodiment. The camera 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 can display not only the captured image but also environmental information, camera instructions, etc. The environmental information may include the intensity of external light, the direction of external light, the speed of movement of the subject, and the likelihood of the subject being obstructed by an object.

[0074] The imaging device 1100 includes an optical unit (not shown). The optical unit includes multiple lenses and forms an image on an imaging element stored in the housing 1104. The multiple lenses can be focused by adjusting their relative positions. This operation can be performed automatically. The imaging device may be referred to as a photoelectric conversion device. Instead of sequentially capturing images, the photoelectric conversion device may include methods for detecting differences from previous images, methods for extracting images from continuously recorded images, etc., as imaging methods.

[0075] Figure 11B This is a schematic diagram illustrating an example of a portable terminal as an electronic device according to an embodiment. The portable terminal 1200 includes a display unit 1201, an operation unit 1202, and a housing 1203. The housing 1203 may store a circuit, a printed circuit board including the circuit, a battery, and a communication unit. The operation unit 1202 may be a button or a touch panel type response unit. The operation unit may be a biometric authentication unit that recognizes a fingerprint and performs unlocking. A portable terminal including a communication unit can also be considered a communication device. The portable terminal may further have camera functionality by including a lens and an imaging element. Images captured by the camera are displayed on the display unit. Examples of electronic devices are smartphones and laptops.

[0076] Figure 12A and Figure 12B This is a schematic diagram illustrating an example of a display device as an electronic device according to an embodiment. Figure 12A A display device that can be used as a TV monitor, PC monitor, etc., is shown. The display device 1300 includes a frame 1301 and a display unit 1302. An organic EL display device 10 can be used as the display unit 1302. Figure 12AThe display device shown may include a support frame 1301 and a base 1303 for the display unit 1302. The base 1303 is not limited to... Figure 12A The frame 1301 is in the form shown, and the lower side of the frame 1301 can be used as a base. The frame 1301 and the display unit 1302 can be formed as curved surfaces, and the radius of curvature can be, for example, 5000 mm (inclusive) to 6000 mm (inclusive).

[0077] Figure 12B This is a schematic diagram illustrating another example of a display device as an electronic device according to an embodiment. Figure 12B The display device 1310 shown is configured to be foldable and is a so-called foldable display device. The display device 1310 includes a first display unit 1311, a second display unit 1312, a housing 1313, and a bending point 1314. An 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 can be a seamless display device. The first display unit 1311 and the second display unit 1312 can be separated at the bending point. The first display unit 1311 and the second display unit 1312 can display different images, or they can display a single image.

[0078] Figure 13A This 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, a filter 1404, and a light diffuser 1405. An organic EL display device 10 may be used as the light source. The filter may be a filter that improves the color rendering of the light source. The light diffuser can effectively diffuse the light from the light source and send the light over a large illumination range, etc. The filter and the light diffuser may be provided on the light emitting side of the illumination. A cover may be provided on the outermost side if necessary.

[0079] Lighting devices are, for example, devices for illuminating the interior of a room. The lighting device can emit white, daylight white, and any color from blue to red. A light control circuit can be provided to control the light. The lighting device may include an organic light-emitting element according to the invention and a power supply circuit connected thereto. The power supply circuit is a circuit that converts AC voltage to DC voltage. White light has a color temperature of 4200K, while daylight white has a color temperature of 5000K. The lighting device may include a color filter. The lighting device may include a heat dissipation unit. The heat dissipation unit dissipates heat to the outside of the device and may use metals with high specific heat, liquid silicon, etc.

[0080] Figure 13BThis is a schematic diagram of a car as an example of a moving body according to an embodiment. The car includes a taillight as an example of a lighting tool. The car 1500 includes a taillight 1501 and may have a form in which the taillight is illuminated when braking is performed, etc. As the taillight 1501, an organic EL display device 10 can be used. The taillight may include a protective member protecting the organic EL element. The protective member has a certain degree of strength. If the protective member is transparent, it can be made of any material, and is preferably made of polycarbonate, etc. Furan dicarboxylic acid derivatives, acrylonitrile derivatives, etc., can be mixed into polycarbonate.

[0081] The vehicle 1500 may include a vehicle body 1503 and a window 1502 mounted to the vehicle body. If the window is not used to confirm the front and rear of the vehicle, it may be a transparent display. As a transparent display, an organic EL display device 10 may be used. In this case, the constituent materials such as electrodes provided in the organic EL display device 10 are formed of transparent components.

[0082] The mobile body can be a ship, airplane, drone, etc. The mobile body may include a fuselage and lighting equipment mounted on the fuselage. The lighting equipment can emit light to indicate the position of the fuselage. The lighting equipment includes an organic light-emitting element according to this embodiment.

[0083] Reference Figure 14A and Figure 14B An example of an electronic device according to an embodiment is described. The electronic device may be, for example, a wearable device, such as smart glasses, an HMD, or smart contact lenses. An organic EL display device 10 may be used as the display unit of such an electronic device.

[0084] Figure 14A An example of glasses 1400 (smart glasses) as an electronic device is shown. A camera device 1402, such as a CMOS sensor or SPAD, is provided on the surface side of the lens 1401 of the glasses 1400. Furthermore, 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.

[0085] The glasses 1400 may also include a control device 1403. The control device 1403 serves as a power source for supplying power to the camera device 1402 and the display device according to various embodiments. Furthermore, the control device 1403 controls the operation of the camera device 1402 and the display device. An optical system configured to converge light onto the camera device 1402 is formed on the lens 1401.

[0086] Figure 14BAnother example of glasses 1400 (smart glasses) as an electronic device is shown. Glasses 1410 includes a control device 1412, and a camera device and a display device are mounted in the control device 1412. An organic EL display device 10 can be used as the display device. The camera device in the control device 1412 and an optical system configured to project light emitted from the display device are formed in a lens 1411, and an image is projected onto the lens 1411. The control device 1412 serves as a power source for providing power to the camera device and the display device, and controls the operation of the camera device and the display device. The control device 1412 may include a gaze detection unit for detecting the wearer's gaze. The gaze detection can be performed using infrared light. An infrared emitting unit emits infrared light towards the eyeball of a user gazing at the displayed image. The camera unit, including a light-receiving element, detects the reflected light from the eyeball of the emitted infrared light, thereby obtaining a captured image of the eyeball. A reduction means is provided for reducing the light from the infrared emitting unit to the display unit in a planar image, thereby reducing image quality degradation.

[0087] This method detects a user's gaze at a displayed image from an image of the eye obtained by capturing infrared light. Any known method can be applied to gaze detection using an image of the eye. As an example, a gaze detection method based on a Purkinje image obtained from the reflection of illumination light by the cornea can be used. More specifically, gaze detection processing based on central pupillary corneal reflection is performed. Using the central pupillary corneal reflection, a gaze vector representing the eye's direction (rotation angle) is calculated based on the pupil image and the Purkinje image included in the image of the eye, thereby detecting the user's gaze.

[0088] The display device according to the embodiments may include a camera device with a light-receiving element, and may control the displayed image based on gaze information from a user of the camera device. More specifically, the display device may determine a first field of view and a second field of view other than the first field of view based on the gaze information. The first and second field of view may be determined by a control device of the display device, or may receive those field of view areas determined by an external control device. Within the display area of ​​the display device, the display resolution of the first field of view may be controlled to be higher than the display resolution of the second field of view. That is, the resolution of the second field of view may be lower than the resolution of the first field of view.

[0089] Furthermore, the display area includes a first display area and a second display area different from the first display area, and a higher priority area is determined from the first and second display areas based on viewing information. The first and second display areas can be determined by the control device of the display device, or they can receive those display areas determined by an external control device. The resolution of the higher priority area can be controlled to be higher than the resolution of other areas. That is, the resolution of relatively low priority areas may be lower.

[0090] Note that AI can be used to determine the primary visual field or a high-priority region. The AI ​​can be a model constructed to estimate the angle of the line of sight and the distance to a target in front of the line of sight from an image of the eye, using the image of the eye and the actual direction of the eye's gaze in that image as supervisory data. The AI ​​program can be stored on a display device, a camera device, or an external device. If the AI ​​program is stored on an external device, it will be transmitted to the display device via communication.

[0091] When display control is performed based on gaze detection, smart glasses that further include a camera device configured to capture external images can preferably be used. The smart glasses can display the captured external information in real time.

[0092] As described above, when the device using the organic light-emitting element according to this embodiment is used, a stable display with high image quality can be performed even during long-term display.

[0093] Several embodiments will be described below.

[0094] (Example 1)

[0095] have Figure 6 The display device with the configuration shown is manufactured as follows: First, aluminum is formed and patterned on a substrate 1 to form a first light-emitting element, a second light-emitting element, and a third light-emitting element. Next, an insulating layer 5 is formed between the lower electrodes 2. The insulating layer 5 is made of silicon oxide. The film thickness of the insulating layer 5 is 65 nm. Openings are formed in the insulating layer 5 of each light-emitting element to form a first light-emitting region, a second light-emitting region, and a third light-emitting region. The width of the openings of the first light-emitting region, the second light-emitting region, and the third light-emitting region in the central and peripheral portions of the display area is 3.8 μm.

[0096] Next, an organic compound layer is formed on the lower electrode 2. More specifically, compound 1 is formed as a hole injection layer with a thickness of 3 nm. Next, compound 2 is formed as a hole transport layer with a thickness of 15 nm, and compound 3 is formed as an electron blocking layer with a thickness of 10 nm.

[0097] A first luminescent layer with a thickness of 10 nm is formed, comprising 97% by weight of compound 4 as a matrix material and 3% by weight of compound 5 as a luminescent dopant. A second luminescent layer with a thickness of 10 nm is formed, comprising 98% by weight of compound 4 as a matrix material and 1% by weight of compounds 6 and 7 as luminescent dopant. Compound 8 is formed as an electron transport layer with a thickness of 110 nm. Lithium fluoride is formed as an electron injection layer with a thickness of 1 nm.

[0098]

[0099] Next, a Mg / Ag alloy with a thickness of 10 nm is formed as the upper electrode 4. The ratio of Mg to Ag is 1:1. Then, as the protective layer 6, a SiN film with a thickness of 2 μm is formed by CVD. In addition, a planarization layer 7 with a thickness of 300 nm is formed on the SiN film by spin coating.

[0100] Next, a color filter layer CFL is formed on the planarization layer 7. The first color filter is configured to allow the blue component to pass through, the second color filter is configured to allow the red component to pass through, and the third color filter is configured to allow the green component to pass through.

[0101] In the first pixel at the center of the display area, a first color filter and a second color filter are formed to overlap in a planar view as a first light-shielding area, with an overlap of 0.1 μm. Furthermore, a first color filter and a third color filter are also formed to overlap in a planar view as a first light-shielding area, with an overlap of 0.1 μm. The size of the opening (the opening of the first light-emitting element) of the first color filter in the first pixel at the center of the display area is 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 area of ​​the first pixel in the center is 1.32.

[0102] In the second pixel at the periphery of the display area, as a first light-shielding region, the ends of the first color filter and the second color filter are formed to overlap in a planar view, and the overlap amount is 0.4 μm. Furthermore, as a first light-shielding region, the ends of the first color filter and the third color filter are formed to overlap in a planar view, and the overlap amount is 0.4 μm.

[0103] The size of the opening of the first color filter (the opening of the first light-emitting element) in the second pixel in the periphery of the display area is 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 periphery is 1.16.

[0104] As described above, in Embodiment 1, a display device was manufactured 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 is smaller in the second pixel disposed in the peripheral portion than in the first pixel disposed in the central portion. Based on this configuration, the effect of reducing the chromaticity difference between pixels was confirmed. Furthermore, based on this configuration, a reduction in power consumption was confirmed.

[0105] (Example 2)

[0106] In Embodiment 2, the display device is manufactured in the same manner as in Embodiment 1, except for the color filter and the first light-shielding area.

[0107] A black resin material is formed on the planarization layer as the first light-shielding area. Black resin material is formed on the side of the first light-emitting element at the boundary between the first and second light-emitting elements, and at the boundary between the first and third light-emitting elements, respectively. In the first pixel at the center of the display area, the width (size) of the black resin material is 0.1 μm. Therefore, in the first pixel at the center of the display area, the size of the opening of the first color filter, which is formed later, is set to 5.0 μm, and 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 first light-emitting area is set to 1.32.

[0108] In the second pixel at the periphery of the display area, the width (size) of the black resin material is 0.4 μm. Therefore, in the second pixel at the periphery of the display area, the size of the opening of the first color filter (the opening of the first light-emitting element), which is formed later, is 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 is set to 1.16.

[0109] A first color filter, a second color filter, and a third color filter are formed on a black resin material. In the central and peripheral portions of the display area, the first and second color filters are formed to overlap in a planar view, with an overlap of 0.1 μm. Furthermore, the first and third color filters are formed to overlap in a planar view, with an overlap of 0.1 μm.

[0110] As described above, in Embodiment 2, a display device was manufactured 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 is smaller in the second pixel disposed in the peripheral portion than in the first pixel disposed in the central portion. Based on this configuration, it was confirmed that the effect of reducing the chromaticity difference between pixels was reduced. Furthermore, based on this configuration, it was confirmed that power consumption was reduced.

[0111] (Example 3)

[0112] In Embodiment 3, the display device is manufactured in the same manner as in Embodiment 1, except for the first light-emitting area and the first light-shielding area.

[0113] In the first pixel at the center of the display area, the aperture width (size) of the first light-emitting area is 3.5 μm. The aperture widths of the second and third light-emitting areas at the center are both 3.8 μm. In the second pixel at the periphery of the display area, the aperture widths of the first, second, and third light-emitting areas are all 3.8 μm.

[0114] Regarding the color filters, in the central and peripheral portions of the display area, the first and second color filters are formed to overlap in a planar view, with an overlap of 0.1 μm. Furthermore, the first and third color filters are formed to overlap in a planar view, with an overlap of 0.1 μm. In the central and peripheral portions of the display area, the opening size of the first color filter is 4.4 μm.

[0115] In the first pixel at the center of the display area, 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 first light-emitting area is 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 (the opening of the first light-emitting element) to the size of the first light-emitting area is 1.16.

[0116] As described above, in Embodiment 3, a display device was manufactured 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 is smaller in the second pixel disposed in the peripheral portion than in the first pixel disposed in the central portion. Based on this configuration, it was confirmed that the effect of reducing the chromaticity difference between pixels was reduced. Furthermore, based on this configuration, it was confirmed that power consumption was reduced.

[0117] According to the present invention, a technique is provided that is beneficial for reducing the chromaticity difference between pixels.

[0118] While the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the claims should be accorded the broadest interpretation to include all such variations, equivalent structures, and functions.

Claims

1. A display device comprising a display region configured with a plurality of pixels, wherein the plurality of pixels includes a first pixel configured in a central portion of the display region and a second pixel configured between the first pixel and an edge of the display region, each of the plurality of pixels includes a first light-emitting element and a second light-emitting element, and a color filter layer made of a color filter material is configured on the first light-emitting element and the second light-emitting element, the first light-emitting element includes a first light-emitting region and a first color filter configured in the color filter layer, and the second light-emitting element includes a second light-emitting region and a second color filter configured in the color filter layer and having a spectral transmittance characteristic different from that of the first color filter, a first ratio is a ratio of an area of the first color filter capable of transmitting light in the first pixel to an area of the first light-emitting region, a second ratio is a ratio of an area of the second color filter capable of transmitting light in the first pixel to an area of the second light-emitting region, a third ratio is a ratio of an area of the first color filter capable of transmitting light in the second pixel to an area of the first light-emitting region, a fourth ratio is a ratio of an area of the second color filter capable of transmitting light in the second pixel to an area of the second light-emitting region, a difference between the first ratio and the third ratio is larger than a difference between the second ratio and the fourth ratio.

2. The display device according to claim 1, wherein the area of the first color filter capable of transmitting light is smaller in the second pixel than in the first pixel.

3. The display device according to claim 2, wherein a difference between the area of the first color filter capable of transmitting light in the first pixel and the area of the first color filter capable of transmitting light in the second pixel is larger than a difference between the area of the light-emitting region of the first light-emitting element in the first pixel and the area of the light-emitting region of the first light-emitting element in the second pixel.

4. The display device according to claim 3, wherein the area of the light-emitting region of the first light-emitting element is equal to the area of the light-emitting region of the second light-emitting element.

5. The display device according to claim 1, wherein the area of the light-emitting region of the first light-emitting element is larger in the second pixel than in the first pixel.

6. The display device of claim 5, wherein, a difference between the area of the light-emitting region of the first light-emitting element in the second pixel and the area of the light-emitting region of the first light-emitting element in the first pixel is larger than a difference between the area of the first color filter capable of transmitting light in the first pixel and the area of the first color filter capable of transmitting light in the second pixel.

7. The display device of claim 6, wherein, the area of the first color filter capable of transmitting light in the first pixel is equal to the area of the first color filter capable of transmitting light in the second pixel.

8. The display device according to claim 1, wherein the area of the first color filter capable of transmitting light is defined by a light-blocking region formed by overlapping of the first color filter and the second color filter, and a size of the light-blocking region is larger in the second pixel than in the first pixel.

9. The display device according to claim 1, wherein the color filter layer contains a light-absorbing material, the area of the first color filter capable of transmitting light is defined by a light-blocking region formed by overlapping of the first color filter and the light-absorbing material, and a size of the light-blocking region is larger in the second pixel than in the first pixel.

10. The display device according to claim 1, wherein each of the plurality of pixels further includes a third light-emitting element, and The third light emitting element includes a third light emitting region and a third color filter disposed in the color filter layer and having a spectral transmittance characteristic different from those of the first and second color filters.

11. The display device according to claim 1, wherein The first light emitting element includes a lower electrode, a light emitting layer, and an upper electrode, and A peak wavelength of transmittance of the first color filter is given by: 2L / (m-φ / 2π) x 0.85 ≤ λ ≤ 2L / (m-φ / 2π) x 1.15 where m is an integer not less than 0, φ is a phase shift in the lower electrode, λ is the peak wavelength of transmittance of the first color filter, and L is an optical distance from the light emitting layer to the lower electrode.

12. The display device of claim 11, wherein, The first color filter is a blue color filter.

13. The display device of claim 1, wherein, In the second pixel, a center of a light emitting region of the first light emitting element and a center of a region capable of transmitting light of the first color filter are offset from each other in a plan view.

14. An electronic apparatus comprising: an image pickup unit configured to capture a subject; and The display apparatus according to any one of claims 1 to 13 configured to display an image based on an image signal generated based on data output from the image pickup unit.

15. A moving body comprising: an image pickup unit configured to capture a subject; and The display apparatus according to any one of claims 1 to 13 configured to display an image based on an image signal generated based on data output from the image pickup unit.

Images