JP2013211147A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device that displays in full color by combining a white light-emitting organic EL element and a color filter, the display device making it possible to highly reduce a degree of a color shift felt by an observer from a direction oblique to a screen of the display device.SOLUTION: In a lateral direction of a screen of a display device formed by combining red-green-blue three-colored color filters and a white light-emitting organic EL element, sub-pixels, 12R, 12G, and 12B are arranged so that reflecting electrodes 2R and 2G of red and green sub-pixels 12R and 12G are alternately arranged and only a reflecting electrode 2B of a blue sub-pixel 12B is arranged.

Description

  The present invention relates to a display device using a color filter and an organic EL element.

  In a display device using an organic EL (electroluminescence) element as a light emitting element, a method using a color filter has been proposed as one of methods for realizing color display. Such a system is a system in which red, green, and blue light emission is obtained through a color filter of three primary colors of red, green, and blue, using an organic EL element that emits white light as a light source. The organic EL element and the filter of any one of the three primary colors are combined to form a subpixel, and the three primary color subpixels are combined to form a pixel. The screen of the display device is configured by arranging the pixels in a matrix. As one of the pixel arrangement methods, there is a vertical stripe method in which sub-pixels of the same color are arranged in the vertical direction (vertical direction) of the screen. Are known.

  However, the light emitted from the white light emitting organic EL element is diffuse light. In addition, a transparent layer having a thickness composed of an inorganic film or a resin film for sealing the organic EL element exists between the organic EL element and the color filter. For this reason, in a color filter type display device, part of the light emitted from the organic EL element of a certain sub-pixel passes through the color filter of the adjacent sub-pixel, and color mixing occurs depending on the angle at which the screen is observed. There is a problem. In the vertical stripe method, even when the screen is observed obliquely, there is almost no color shift in the vertical direction. On the other hand, in the horizontal (left and right) direction, when the panel is observed obliquely, mixed color light such as light in which red and green are mixed, light in which red and blue are mixed, and light in which green and blue are mixed is visually recognized. Therefore, color misregistration occurs as compared with the case of observation from the front.

  Patent Document 1 proposes to reduce the above-mentioned problem by providing a black stripe and reducing the thickness of the transparent layer between the organic EL element and the color filter for the vertical stripe display device.

JP 2006-73219 A

  However, there is a demand for further improving the image quality by further suppressing the color shift caused by the mixed color light when the image is viewed obliquely.

  An object of the present invention is to make it possible to further reduce the degree of color misregistration perceived by an observer from an oblique direction of a screen of a display device in a display device that displays a full color by combining an organic EL element and a color filter. And

  By the way, the human visual field is wider in the horizontal direction than in the vertical direction. In addition, a camera finder or the like often moves its line of sight especially in the horizontal direction, including panning. The present invention has been made from the viewpoint that it is important to make it difficult for an observer to feel color misregistration in the lateral direction. Furthermore, the present invention also takes into account the fact that among the three primary colors, there are colors that are easy to recognize color misregistration when light of other three primary colors are mixed, and colors that are more difficult to recognize color misregistration than this color. It is also a thing.

The first of the present invention is the first to third subpixels each including a color filter of the first to third colors, and an organic EL element in which a light emitting layer emitting white and a transparent electrode are laminated on the reflective electrode. In a display device having a screen in which a plurality of configured pixels are arranged in a matrix,
The arrangement of the first to third subpixels includes a row in which only the reflective electrodes of the first subpixel are arranged in the horizontal direction of the screen, and the reflective electrodes of the second and third subpixels are arranged on the screen. It is an array that constitutes rows arranged alternately in the horizontal direction.

The second aspect of the present invention is the first to third subpixels each including a color filter of the first to third colors, and an organic EL element in which a light emitting layer emitting white light and a transparent electrode are laminated on the reflective electrode. In a display device having a screen in which a plurality of configured pixels are arranged in a matrix,
The arrangement of at least the first sub-pixels is such that only the reflective electrodes of the first sub-pixels form a row arranged in the horizontal direction of the screen.

  According to a third aspect of the present invention, there is provided an imaging apparatus comprising the display device according to the present invention and an imaging element.

  According to the present invention, it is possible to provide a display device that can reduce color misregistration in the horizontal direction of the screen as compared with the related art and can observe a higher quality display as a whole.

It is the plane schematic diagram which showed the arrangement | sequence of the pixel in one Embodiment of this invention, a subpixel, and a reflective electrode. FIG. 4 is a schematic cross-sectional view showing the configuration of second and third subpixels of the embodiment of the present invention shown in FIG. 1. It is the cross-sectional schematic diagram which showed the structure of the 1st subpixel of one Embodiment of this invention shown in FIG. It is the plane schematic diagram which showed the arrangement | sequence of the pixel and reflective electrode in other embodiment of this invention. It is the plane schematic diagram which showed the arrangement | sequence of the pixel and reflective electrode in other embodiment of this invention. It is the plane schematic diagram which showed the arrangement | sequence of the pixel in other embodiment of this invention, a subpixel, and a reflective electrode. It is the plane schematic diagram which showed the arrangement | sequence of the pixel in the comparative example of this invention, a subpixel, and a reflective electrode. It is explanatory drawing about the observation angle of the horizontal direction in the Example of this invention.

  The display device of the present invention is a system that displays a full color by combining a white light emitting organic EL element and a color filter. Specifically, basically, first to third sub filters each including a color filter of first to third colors and an organic EL element in which a light emitting layer emitting white light and a transparent electrode are laminated on a reflective electrode, respectively. This is a display device having a screen in which a plurality of pixels composed of pixels are arranged in a matrix. In the present invention, the color shift in the horizontal direction of the screen is reduced by devising the arrangement of the reflective electrodes. In the present invention, the horizontal direction of the screen is the horizontal direction when a display device such as a camera or a television is used with the screen upright.

  Generally, three primary colors of blue, green, and red are used as the color of the color filter. Therefore, hereinafter, the present invention will be described by taking as an example a configuration using the color filters of the three primary colors, with blue, green, and red as the first to third colors. It is not limited.

  FIG. 1A is a diagram of the display device according to the first embodiment of the present invention viewed from the normal direction of the substrate, and is a diagram schematically illustrating the arrangement of pixels and reflective electrodes according to the present embodiment. . In the following description, the horizontal direction of the screen of the display device of the present invention is illustrated as the X direction and the vertical direction as the Y direction.

  In the display device of the present invention, a plurality of pixels 10 are arranged in a matrix in a display region 14 on a substrate 1. FIG. 1B is an enlarged view showing one pixel 10 in FIG. One pixel 10 includes three sub-pixels: a blue sub-pixel (B sub-pixel) 12B, a green sub-pixel (G sub-pixel) 12G, and a red sub-pixel (R sub-pixel) 12R. In the present embodiment, a column in which only the reflective electrodes 2B of the B subpixel 12B are arranged in the X direction, and a reflective electrode 2G of the G subpixel 12G and a reflective electrode 2R of the R subpixel 12R are alternately arranged in the X direction. The sub-pixels 12R, 12G, and 12B are arranged so as to form a line.

  FIG. 7A is a view of a conventional vertical stripe type display device viewed from the normal direction of the substrate, and schematically shows the arrangement of pixels and reflection electrodes of the display device. FIG. 7B is an enlarged view showing one pixel 10 in FIG. In the conventional vertical stripe method, the sub-pixels 12R, 12G, and 12B are arranged so that rows in which only the reflective electrodes 2R, 2G, and 2B of the sub-pixels 12R, 12G, and 12B are arranged in the Y direction are formed. Yes.

  As shown in FIG. 7B, in the conventional vertical stripe method, sub-pixels 12R, 12G, and 12B of three colors are sequentially arranged in the X direction. Therefore, color mixing does not occur in the Y direction, but color mixing occurs in each of the three sub-pixels in the X direction.

  On the other hand, as shown in FIG. 1B, in the display device of the present embodiment, a column in which R subpixels 12R and G subpixels 12G are alternately arranged in the X direction, and a column in which only B subpixels 12B are arranged. Is configured. Accordingly, color mixing occurs in each of the two color sub-pixels alternately arranged in the X direction, but the number of sub-pixels in which color misregistration is reduced as compared with the conventional vertical stripe method in which color mixing occurs in each of the three color sub-pixels. To do. Therefore, in the display device of the present invention, the color shift in the X direction is reduced as compared with the vertical stripe method.

  Further, in the display device according to the present embodiment, since the two color sub-pixels are alternately arranged in the Y direction, color misregistration due to color mixing occurs in the Y direction in each of the two color sub-pixels. However, since the influence of color misregistration in the Y direction on the display is small compared to the X direction, the color in the Y direction according to the display device of the present invention is lower than that in the vertical stripe method in which no color mixture occurs in the Y direction. The shift does not have a significant effect on the display.

  Therefore, in the display device of the present invention, a display in which the color shift is reduced as a whole is observed as compared with the conventional vertical stripe method.

  Further, when subpixels are arranged as shown in FIG. 1B, color misregistration is further reduced by specifying the colors of the two subpixels that cause color mixing in the X direction. The operation will be described below.

  Compared with green, red and blue are easier to recognize color shift. Table 1 shows the result of calculating the amount of color shift (Δu'v ') when 98% of the main color is mixed with 2% of the mixed color, and a small amount of green is mixed with red and blue quantitatively. In this case, the color misregistration amount is larger than the color misregistration amount when a small amount of red or blue is mixed with green. Therefore, in the present invention, a combination of red or blue and green is selected as the color of the subpixels alternately arranged in the X direction, and blue is selected as the color of the subpixel in the column in which only the subpixels of the same color are arranged in the X direction. Or it is preferable to select red. When red or blue subpixels and green subpixels are alternately arranged in the X direction, color mixing occurs in each of the red or blue subpixels and the green subpixels in the X direction. However, the amount of color shift due to color mixture is smaller in green than in red or blue. Therefore, the configuration in which red or blue sub-pixels and green sub-pixels are alternately arranged in the X direction is more misaligned in the X direction than the configuration in which red and blue sub-pixels are alternately arranged in the X direction. Becomes smaller. In addition, since color mixing in the X direction does not occur in the subpixels in a row in which only the subpixels of the same color are arranged in the X direction, no color shift occurs even if subpixels of any color are arranged. Therefore, in the present invention, the R subpixel or the B subpixel is selected as the subpixel of the column in which only the subpixels of the same color are arranged in the X direction, and the B subpixel or the R subpixel is selected as the subpixel arranged alternately in the X direction. By selecting a combination of a pixel and a G subpixel, a display with a further reduced color shift is observed.

  In FIG. 1B, only the subpixels of the same color are arranged in the X direction, and the B subpixel 12B is used as the subpixel arranged alternately in the X direction. The same effect can be obtained even if the B subpixel 12B is replaced with the R subpixel 12R.

  Next, with reference to FIG. 2A and FIG. 2B, details of the stacked structure of the pixels and the light emission path will be described. 2A is a schematic cross-sectional view of the two pixels 10 taken along the broken line AA ′ in FIG. 1, and FIG. 2B is a schematic cross-sectional view of the two pixels 10 taken along the broken line BB ′ in FIG. It is. 2A and 2B, 1 is a substrate, 2R, 2G, and 2B are reflective electrodes (anodes), 3 is an organic EL layer, 4 is a transparent electrode (cathode), 5 is a sealing film, 6 Is an adhesive resin layer. Furthermore, 7R is a red filter (R filter), 7G is a green filter (G filter), 7B is a blue filter (B filter), 8 is a black matrix, 9 is a counter substrate, 13R, 13G, and 13B are organic EL elements, 15 Is a protective layer of the color filter. The organic EL layer 3 is an organic compound layer including a light emitting layer that emits at least white, and includes a hole injection layer, a hole transport layer, an electron transport layer, an electron injection layer, and the like as necessary. The reflective electrodes 2R, 2G, 2B are formed corresponding to the sub-pixels 12R, 12G, 12B, and the organic EL layer 3 and the transparent electrode 4 are formed in common for a plurality of pixels or formed in common for all pixels. Sometimes it is done. The reflective electrodes 2R, 2G, 2B, the organic EL layer 3, and the transparent electrode 4 constitute the organic EL elements 13R, 13G, 13B of the R subpixel 12R, the G subpixel 12G, and the B subpixel 12B. Therefore, the light emitting areas of the sub-pixels 12R, 12G, and 12B are defined by the reflective electrodes 2R, 2G, and 2B. In the display device of this embodiment, the substrate 1 formed up to the sealing film 5, the black matrix 8, the color filters 7 R, 7 G, and 7 B and the counter substrate 9 formed with the protective layer 15 are protected with the sealing film 5. It is arranged so as to face the layer 15 so as to face each other, and is bonded by the adhesive resin layer 6.

  The light emitted from the organic EL layer 3 is diffused light, and the distance from the light emitting point to the color filters 7R, 7G, 7B is about several μm. Therefore, as shown in FIG. 2A and FIG. 2B, there is light that passes through the color filter of its own subpixel and light that passes through the color filter of the adjacent subpixel. Since the degree of light transmitted through the color filters of adjacent sub-pixels affects the size and shape of the reflective electrodes 2R, 2G, and 2B, the present invention has been devised for the arrangement of the reflective electrodes 2R, 2G, and 2B. ing. That is, in this embodiment, the reflective electrodes 2R of the R subpixel 12R and the reflective electrodes 2G of the G subpixel 12G are alternately arranged in the X direction, and adjacent to the X direction of the reflective electrode 2B of the B subpixel 12B. Only the reflective electrodes 2B of the B subpixel 12B of the pixel 10 are arranged. Therefore, when the panel is observed from the X direction, a mixed color of red and green is generated depending on an observation angle (elevation angle), but a mixed color of blue, red, and green is not generated.

  Therefore, the effect of reducing color misregistration is further enhanced by arranging only the reflective electrodes of the sub-pixels in the X direction for the sub-pixels having a large influence of color mixing.

  In the configuration of FIG. 2, the black matrix 8 is provided between the subpixels adjacent to each other. However, in the present invention, the black matrix 8 may or may not be installed. In the case where the black matrix 8 is provided, it is preferable that the black matrix 8 is provided at least between sub-pixels having different colors of the color filter.

  In the case where the black matrix 8 is disposed, it can be disposed on the sealing film 5 in addition to the embodiment described with reference to FIGS. 2 (a) and 2 (b). The structural example which concerns on Fig.3 (a) and FIG.3 (b) is shown. 3A is a schematic cross-sectional view corresponding to the two pixels 10 along the broken line AA ′ in FIG. 1, as in FIG. 2A. FIG. 3B is a cross-sectional view of FIG. FIG. 6 is a schematic cross-sectional view corresponding to two pixels 10 along a broken line BB ′ in FIG. 3A and 3B is manufactured by sequentially laminating layers from the substrate 1 to the counter substrate 9. 3A and 3B, since there is no adhesive resin layer 6 as compared with the configuration of FIG. 2, the distance from the light emitting point to the color filters 7R, 7G, and 7B is shortened, causing a color shift. It can be difficult. As a case where the black matrix 8 is not disposed, for example, a configuration in which the black matrix 8 is excluded from FIGS. 2A, 2B, 3A, and 3B can be employed. Even without the black matrix 8, the pixel arrangement of the present invention can reduce the color shift in the X direction as compared to the conventional vertical stripe method in which sub-pixels of the same color are arranged in a vertical stripe.

  4 to 6 are views of a display device according to another embodiment of the present invention as seen from the normal direction of the substrate, and are diagrams schematically showing the arrangement of pixels and reflective electrodes.

  In the present invention, the shape and size of the reflective electrode can be freely set. For example, as shown in FIG. 4, the length of the reflective electrode 2B of the B sub-pixel 12B in the X direction is made larger than in the case of FIG. Can be long. In such a configuration, since the area of the reflective electrode 2B of the B subpixel 12B is increased, a longer life can be achieved as compared with the configuration of FIG.

  For example, as shown in FIG. 5, the length in the X direction of the reflective electrode 2B of the B subpixel 12B is made longer than that in FIG. At the same time, the length in the Y direction is made shorter than in the case of FIG. 1, and the interval in the Y direction between the reflective electrode 2B and the reflective electrodes 2R and 2G is made larger than the interval in the X direction between the reflective electrodes 2R and 2G. it can. In this case, since the distance between the reflective electrode 2B of the B subpixel 12B and the R filter 7R or G filter 7G is increased, light emission from the B subpixel 12B is difficult to transmit through the R filter 7R or G filter 7G. , Y color misregistration can be reduced.

  In the above description, the case where the B subpixel 12B is the first subpixel has been described. However, the same effect can be obtained by using the R subpixel 12R as the first subpixel instead of the B subpixel 12B.

  Next, a second embodiment of the present invention will be described. In the second embodiment of the present invention, at least the arrangement of the first sub-pixels is an arrangement that forms a column in which only the reflective electrodes of the first sub-pixels are arranged in the horizontal direction of the screen. Preferably, the arrangement of the first to third subpixels is an arrangement that forms a row in which only the reflective electrodes of the first to third subpixels are arranged in the horizontal direction of the screen.

  Specifically, as shown in FIG. 6, a so-called horizontal stripe method can be used. FIG. 6A is a diagram of a horizontal stripe type display device viewed from the normal direction of the substrate, and schematically shows an arrangement of pixels and reflection electrodes of the display device. FIG. 6B is an enlarged view of one pixel 10 in FIG. In such a configuration, not only the reflective electrode 2B of the B sub-pixel 12B but also the reflective electrodes 2R and 2G of the R sub-pixel 12R and the G sub-pixel 12G have the same sub-pixel reflective electrode in the X direction. In this configuration, although three colors are mixed in the Y direction, color mixing does not occur in the X direction, which has a large effect on the display of color shift due to the mixed colors, so that color shift is reduced compared to the conventional vertical stripe method. The displayed display is observed.

  In addition, the present invention is characterized by the subpixel arrangement method, and the manufacturing method and materials of the display device are not particularly limited, and conventional techniques can be applied.

  The display device of the present invention is used in a display unit of a television receiver or a personal computer. In addition, the display device of the present invention may be arranged in a display unit or an electronic viewfinder of an imaging device such as a digital camera or a digital video camera. The imaging device further includes an imaging optical system for imaging and an imaging element such as a CMOS sensor.

  The display device of the present invention may be arranged in a display unit of a mobile phone, a display unit of a portable game machine, or the like, and further, a display unit of a portable music player, a display of a personal digital assistant (PDA) May be arranged in the display part of the car navigation system. In addition, the display device of the present invention may be disposed on the operation panel unit of the image forming apparatus.

  EXAMPLES Hereinafter, although the suitable Example of this invention is described in detail, this invention is not limited to these Examples.

(Example 1)
As shown in FIGS. 1A and 1B, the reflective electrodes 2R, 2G, and 2B and the sub-pixels 12R, 12G, and 12B are arranged, and the layer configuration shown in FIGS. A display device was manufactured.

  The substrate 1 is composed of silicon, the reflective electrode (anode) 2 is a Ti film having a thickness of 50 nm, and the organic EL layer 3 is composed of four layers including a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer. A 120-nm-thick white light-emitting organic EL layer 3 was sequentially formed. Next, an IZO film having a thickness of 100 nm was formed as the transparent electrode (cathode) 4, and an SiN film having a thickness of 1 μm was formed as the sealing layer 5.

  On the other hand, on the transparent glass as the counter substrate 9, a metal chromium film having a thickness of 0.2 μm and a width of 1 μm as the black matrix 8, and an acrylic pigment containing a pigment as the color filters 7R, 7G and 7B having a thickness of 2.2 μm. A series resin layer was sequentially formed. The black matrix 8 was disposed between adjacent subpixels. Next, an acrylic resin layer having a thickness of 1 μm was formed as the color filter protective layer 15.

  The sealing layer 5 and the color filter protective layer 15 were adhered as an adhesive resin layer 6 with an acrylic resin layer having a thickness of 1 μm.

  The size of each part was 12 μm × 12 μm for the pixel 10, 4 μm × 4 μm for the reflective electrodes 2R, 2G, and 2B, 6 μm × 6 μm for the R filter 7R and G filter, and 12 μm × 6 μm for the B filter 7B.

In a display device in which the pixels 10 with the above conditions are arranged in 1280 in the X direction and 1024 in the Y direction, red display, green display, and blue display are performed, and as shown in FIG. 8, the elevation angles are θ ₁ = 75 °, θ ₂ = Chromaticity was measured using a spectroradiometer from a position of 90 ° and θ ₃ = 115 °.

  Table 2 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the X direction. Compared to the vertical stripe method of Comparative Example 1 described later, the color misregistration in the X direction could be reduced for each color.

(Example 2)
As shown in FIG. 4, a display device was manufactured in the same manner as in Example 1 except that the reflective electrode 2B of the B subpixel 12B was 10 μm × 4 μm and the length in the X direction was increased.

  Table 2 shows the amount of color misregistration (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the horizontal direction when red display, green display, and blue display are performed. The display device of this example did not change the degree of color misregistration in the X direction compared to Example 1.

(Example 3)
As shown in FIG. 5, the display of the same conditions as in Example 1 is performed except that the reflective electrode 2B of the B subpixel 12B is 10 μm × 2 μm, the length in the X direction is increased and the length in the Y direction is decreased. A device was made.

  Table 2 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the X direction in the case of red display, green display, and blue display. The display device of this example did not change the degree of color misregistration in the X direction compared to Example 1.

Example 4
A display device is manufactured in the same manner as in Example 1 except that the reflective electrodes 2R, 2G, and 2B are each 10 μm × 2 μm, the color filters 7R, 7G, and 7B are each 12 μm × 4 μm, and the horizontal stripe method shown in FIG. did. The black matrix 8 was disposed between adjacent subpixels.

  Table 2 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the X direction in the case of red display, green display, and blue display. The display device of this example was able to reduce red and green color misregistration in the X direction, similar to the display devices of Examples 1 to 3.

(Comparative Example 1)
A display device is manufactured in the same manner as in Example 1 except that the reflective electrodes 2R, 2G, and 2B are 2 × 10 μm, the color filters 7R, 7G, and 7B are 4 μm × 12 μm, respectively, and the vertical stripe method shown in FIG. did. The black matrix 8 was disposed between adjacent subpixels.

  Table 2 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the X direction in the case of red display, green display, and blue display. In the display device of this example, the color shift in the X direction was large in all of red, green, and blue compared to the display devices of Examples 1 to 3.

(Example 5)
As shown in FIGS. 1 (a) and 1 (b), the reflective electrodes 2R, 2G, and 2B and the sub-pixels 12R, 12G, and 12B are arranged, as shown in FIGS. 3 (a) and 3 (b). A display device having a layer structure was manufactured. The sizes of the pixels 10, the reflective electrodes 2R, 2G, and 2B, the color filters 7R, 7G, and 7B and the number of the pixels 10 in the display area 14 are the same as those in the first embodiment.

  Similar to Example 1, the reflective electrodes 2R, 2G, and 2B, the organic EL layer 3, the transparent electrode 4, and the sealing layer 5 were formed on the substrate 1. Thereafter, on the sealing layer 5, a black chromium matrix 8 having a film thickness of 0.2 μm and a width of 1 μm, a metal chromium film, and the color filters 7R, 7G, and 7B having a film thickness of 2.2 μm and an acrylic system containing a pigment. A resin layer was formed. The black matrix 8 was disposed between adjacent subpixels. Next, an acrylic resin layer having a thickness of 1 μm as the color filter protective layer 15 and a transparent glass as the counter substrate 9 were laminated.

In the obtained display device, red display, green display, and blue display were performed as in Example 1, and the elevation angles were θ ₁ = 75 °, θ ₂ = 90 °, and θ ₃ = 115 ° as shown in FIG. The chromaticity was measured from the measured position using a spectroradiometer.

  Table 3 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° with respect to the X direction. In the display device of this example, the color misregistration in the X direction could be reduced as compared with the vertical stripe method of Comparative Example 2 described later.

(Example 6)
As shown in FIG. 4, a display device was fabricated in the same manner as in Example 5 except that the reflective electrode 2B of the B subpixel 12B was 10 μm × 4 μm and the length in the X direction was increased.

  Table 3 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the X direction when red display, green display, and blue display are performed. The display device of this example did not change the degree of color misregistration in the X direction compared to Example 5.

(Example 7)
As shown in FIG. 5, the display device is manufactured in the same manner as in Example 5 except that the reflective electrode 2B of the B sub-pixel 12B is 10 μm × 2 μm, and the length in the X direction is long and the length in the Y direction is short. did.

  Table 3 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the X direction when red display, green display, and blue display are performed. Compared with Example 5, the display device of this example did not change the degree of color shift in the horizontal direction.

(Example 8)
A display device is manufactured in the same manner as in Example 5 except that the reflective electrodes 2R, 2G, and 2B are each 10 μm × 2 μm, the color filters 7R, 7G, and 7B are each 12 μm × 4 μm, and the horizontal stripe method shown in FIG. did. The black matrix 8 was disposed between adjacent subpixels.

  Table 3 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the X direction when red display, green display, and blue display are performed. Compared with the display devices of Examples 5 to 7, the display device of this example was able to reduce red and green color shifts in the X direction.

(Comparative Example 2)
The display device is manufactured in the same manner as in Example 5 except that the reflective electrodes 2R, 2G, and 2B are 2 × 10 μm, the color filters 7R, 7G, and 7B are 4 μm × 12 μm, respectively, and the vertical stripe method shown in FIG. did. The black matrix 8 was disposed between adjacent subpixels.

  Table 3 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the X direction when red display, green display, and blue display are performed. In the display device of this example, the color shift in the X direction was large in all of red, green, and blue as compared with the display devices of Examples 5 to 8.

Example 9
A display device is manufactured in the same manner as in Example 5 except that the black matrix 8 is not formed. As in Example 5, red display, green display, and blue display are performed, and the elevation angle (θ) is set as shown in FIG. Chromaticity was measured using a spectroradiometer from positions of 75 °, 90 °, and 115 °. Table 4 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the X direction. The display device of this example was able to reduce the color misregistration in the X direction as compared with the vertical stripe method of Comparative Example 3 described later.

(Example 10)
As shown in FIG. 4, a display device was produced in the same manner as in Example 9 except that the reflective electrode 2B of the B subpixel 12B was made 10 μm × 4 μm long in the X direction.

  Table 4 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the X direction when red display, green display, and blue display are performed. The display device of this example did not change the degree of color shift in the X direction compared to the display device of Example 9.

(Example 11)
As shown in FIG. 5, a display device is manufactured in the same manner as in Example 9 except that the reflective electrode 2B of the B subpixel 12B is 10 μm × 2 μm, and the length in the X direction is long and the length in the Y direction is short. did.

  Table 4 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the X direction when red display, green display, and blue display are performed. The display device of this example did not change the degree of color shift in the X direction compared to the display device of Example 9.

(Example 12)
A display device is manufactured in the same manner as in Example 9 except that the reflective electrodes 2R, 2G, and 2B are each 10 μm × 2 μm, the color filters 7R, 7G, and 7B are each 12 μm × 4 μm, and the horizontal stripe method shown in FIG. did. The black matrix 8 was disposed between adjacent subpixels.

  Table 4 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the case of red display, green display, and blue display. Compared with the display devices of Examples 9 to 11, the display device of this example was able to reduce the color shift in the X direction of red and green.

(Comparative Example 3)
A display device is manufactured in the same manner as in Example 9 except that the reflective electrodes 2R, 2G, and 2B are 2 × 10 μm, the color filters 7R, 7G, and 7B are 4 μm × 12 μm, respectively, and the vertical stripe method shown in FIG. did. The black matrix 8 was disposed between adjacent subpixels.

  Table 4 shows the amount of color shift (Δu′v ′) with respect to chromaticity at an elevation angle of 90 ° in the case of red display, green display, and blue display. In the display device of this example, the color shift in the X direction was large in all of red, green, and blue as compared with the display devices of Examples 9 to 12.

  2R, 2G, 2B: reflective electrode, 3: organic EL layer, 4: transparent electrode, 7R, 7G, 7B: color filter, 8: black matrix, 10: pixel, 12R, 12G, 12B: sub-pixel, 13R, 13G , 13B: Organic EL element

Claims (10)

A plurality of pixels each composed of first to third sub-pixels each including a first to third color filter, and an organic EL element in which a white light emitting layer and a transparent electrode are stacked on the reflective electrode. In a display device having an arranged screen,
The arrangement of the first to third subpixels includes a row in which only the reflective electrodes of the first subpixel are arranged in the horizontal direction of the screen, and the reflective electrodes of the second and third subpixels are arranged on the screen. A display device, characterized in that the display device has an array that forms rows arranged alternately in the horizontal direction.   2. The length of the reflective electrode of the first subpixel is longer than the length of the reflective electrode of the second subpixel and the length of the third subpixel in the horizontal direction of the screen. Display device.   In the vertical direction of the screen, the length of the reflective electrode of the first subpixel is shorter than the length of each of the reflective electrodes of the second subpixel and the third subpixel, and is adjacent to the vertical direction of the screen. The distance between the reflective electrode of the first subpixel and the reflective electrode of the second and third subpixels is such that the reflective electrode of the second subpixel and the reflectiveness of the third subpixel are adjacent to each other in the horizontal direction of the screen. The display device according to claim 1, wherein the display device has a larger distance from the electrode.   4. The display device according to claim 1, wherein the first color is blue, the second color is red, and the third color is green. 5.   4. The display device according to claim 1, wherein the first color is red, the second color is blue, and the third color is green. 5.   6. The display device according to claim 1, further comprising a black matrix between sub-pixels adjacent to each other and having at least different colors of color filters.   The display device according to claim 1, wherein the light emitting layer and the transparent electrode are arranged in common for the plurality of subpixels and the pixels. A plurality of pixels each composed of first to third sub-pixels each including a color filter of first to third colors and an organic EL element in which a light emitting layer emitting white light and a transparent electrode are stacked on a reflective electrode. In a display device having an arranged screen,
The display device according to claim 1, wherein at least the first sub-pixel array forms an array in which only the reflective electrodes of the first sub-pixel are arranged in the horizontal direction of the screen.   The array of the first to third sub-pixels is an array that constitutes a row in which only the reflective electrodes of the first to third sub-pixels are arranged in the horizontal direction of the screen, respectively. 9. The display device according to 8.   An imaging apparatus comprising: the display device according to claim 1; and an imaging element.

Images