Display device

Abstract

To provide a display device that can reduce a manufacturing load and can reduce cost.SOLUTION: A display device comprises: a plurality of pixels; an insulation substrate; an organic electroluminescence element that is positioned above the insulation substrate and includes an organic light-emitting layer; a sealing layer that seals the organic electroluminescence element; a color filter layer that is positioned above the sealing layer and has a first color filter having a first color, a second color filter having a second color being different from the first color and a third color filter having a third color being different from the first color and the second color; and a light shielding region that surrounds a first pixel aperture, a second pixel aperture and a third pixel aperture, and each of the first pixel aperture, the second pixel aperture and the third pixel aperture in each pixel, and in which the first color filter, the second color filter and the third color filter are laminated on each other.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present embodiment relates to a display device. [Background technology]

[0002] In recent years, organic electroluminescence (EL) display devices that use organic light-emitting diodes (OLEDs) as display elements have been put to practical use. Organic EL display devices have a sealing layer that seals the OLEDs. In such organic EL display devices, a configuration is known in which a color filter layer is formed on the sealing layer without providing a polarizing plate. Also known is a color filter substrate in which light-shielding layers and spacers are formed by overlapping color filter layers of the respective colors for forming red, green, and blue pixels. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2022 / 0102674 [Patent Document 2] US Patent Application Publication No. 2021 / 0234134 [Patent Document 3] JP 2008-281919 A Summary of the Invention [Problem to be solved by the invention]

[0004] An object of this embodiment is to provide a display device that can reduce the manufacturing load and the cost. [Means for solving the problem]

[0005] According to the present embodiment, there is provided a display device comprising: a plurality of pixels; an insulating substrate; an organic electroluminescent element located on the insulating substrate and including an organic light-emitting layer; a sealing layer for sealing the organic electroluminescent element; a color filter layer located on the sealing layer and having a first color filter of a first color, a second color filter of a second color different from the first color, and a third color filter of a third color different from the first color and the second color; and in each of the pixels, a first pixel opening in which the first color filter is located, a second pixel opening in which the second color filter is located, and a third pixel opening in which the third color filter is located, and light-shielding regions surrounding each of the first pixel opening, the second pixel opening, and the third pixel opening, and in which the first color filter, the second color filter, and the third color filter are stacked on one another. [Brief description of the drawings]

[0006] [Figure 1] FIG. 1 is a plan view that illustrates a display device according to the present embodiment. [Diagram 2] FIG. 2 is a cross-sectional view showing a display area of ​​the display device shown in FIG. [Diagram 3] FIG. 3 is a plan view showing the layout of a color filter layer arranged in one pixel. [Figure 4] FIG. 4 is a plan view showing the layout of a light-shielding region of one pixel. [Diagram 5] FIG. 5 is a cross-sectional view of the display panel taken along the line AB shown in FIG. [Figure 6] FIG. 6 is a cross-sectional view of the display panel taken along line CD shown in FIG. [Figure 7] FIG. 7 is a cross-sectional view of the display panel taken along the line EF shown in FIG. [Figure 8] FIG. 8 is a plan view showing the layout of the light-shielding region and the groove portion of one pixel. [Figure 9] FIG. 9 is a cross-sectional view of the display panel taken along the line AB shown in FIG. [Figure 10]FIG. 10 is a cross-sectional view of the display panel taken along line CD shown in FIG. [Figure 11] FIG. 11 is a cross-sectional view of the display panel taken along the line EF shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Hereinafter, the present embodiment will be described with reference to the drawings. Note that the disclosure is merely an example, and those who are skilled in the art can easily conceive of appropriate modifications while maintaining the gist of the invention are naturally included in the scope of the present invention. In addition, the drawings may be schematic in terms of width, thickness, shape, etc. of each part compared to the actual embodiment in order to make the explanation clearer, but they are merely examples and do not limit the interpretation of the present invention. In addition, in this specification and each figure, components that perform the same or similar functions as those described above with respect to the previous figures are given the same reference numerals, and duplicate detailed explanations may be omitted as appropriate.

[0008] [First embodiment] First, the configuration of the first embodiment will be described with reference to FIGS.

[0009] 1 is a plan view that shows a schematic configuration of a display device DSP according to the present embodiment. The display device DSP of the present embodiment is an organic electroluminescence (EL) display device.

[0010] In one example, the first direction X, the second direction Y, and the third direction Z are mutually orthogonal, but may intersect at an angle other than 90 degrees. The first direction X and the second direction Y correspond to a direction parallel to the main surface of the substrate constituting the display device DSP, and the third direction Z corresponds to the thickness direction of the display device DSP. In this specification, the direction toward the tip of the arrow indicating the third direction Z is defined as up, and the direction in the opposite direction from the tip of the arrow is defined as down. In addition, it is assumed that there is an observation position at which the display device DSP is observed on the tip side of the arrow indicating the third direction Z, and a view from this observation position toward the XY plane defined by the first direction X and the second direction Y is called a planar view.

[0011] The display device DSP includes a display panel PNL and a wiring board 1 mounted on the display panel PNL.

[0012] The display panel PNL is an organic EL display panel and includes a first substrate SUB1 and a second substrate SUB2 opposed to the first substrate SUB1. The first substrate SUB1 has a mounting portion MT exposed outside the second substrate SUB2. The display panel PNL includes a display area DA for displaying an image, and a non-display area NDA surrounding the display area DA. The display panel PNL includes a plurality of pixels PX arranged in a matrix in the first direction X and the second direction Y in the display area DA.

[0013] The pixel PX is composed of a subpixel SPX1 that displays green (G), a subpixel SPX2 that displays red (R), and a subpixel SPX3 that displays blue (B). Within the pixel PX, the subpixel SPX3 extends in a first direction X. The subpixel SPX1 is aligned in the second direction Y with the subpixel SPX3. The subpixel SPX2 is aligned in the second direction Y with the subpixel SPX3, and aligned in the first direction X with the subpixel SPX1.

[0014] The size, arrangement, and color of each sub-pixel are not limited to the illustrated example. In the illustrated example, pixels PX having the same sub-pixel pattern are arranged in a matrix, but the present invention is not limited to this, and the size, arrangement, and color of each sub-pixel in each pixel PX may be different from each other.

[0015] The wiring board 1 is a flexible board and is mounted on the mounting portion MT. The display panel PNL and the wiring board 1 are electrically connected to each other. The wiring board 1 also includes a driving IC chip 2 that drives the display panel PNL. The driving IC chip 2 may be mounted on the mounting portion MT.

[0016] FIG. 2 is a cross-sectional view showing the display area DA of the display device DSP shown in FIG. As shown in FIG. 2, the display panel PNL includes an insulating substrate 10, switching elements SW1, SW2, SW3, a reflective layer 4, organic electroluminescence (EL) elements OLED1, OLED2, OLED3, a sealing layer 41, an overcoat layer OC, a color filter layer CF, an adhesive layer AD, a sealing substrate 20, etc.

[0017] The insulating substrate 10 may be a glass substrate or a flexible resin film. The first insulating film 11 covers the insulating substrate 10.

[0018] The switching elements SW1, SW2, and SW3 are formed on a first insulating film 11. In the illustrated example, the switching elements SW1, SW2, and SW3 are configured as top-gate type thin film transistors, but may be configured as bottom-gate type thin film transistors. Since the switching elements SW1, SW2, and SW3 have the same configuration, the structure will be described in more detail below, focusing on the switching element SW1. The switching element SW1 includes a semiconductor layer SC formed on the first insulating film 11. The semiconductor layer SC is covered with a second insulating film 12. The second insulating film 12 is also disposed on the first insulating film 11.

[0019] The gate electrode WG of the switching element SW1 is formed on the second insulating film 12 and is located directly above the semiconductor layer SC. The gate electrode WG is covered with a third insulating film 13. The third insulating film 13 is also disposed on the second insulating film 12.

[0020] The first insulating film 11, the second insulating film 12, and the third insulating film 13 are inorganic insulating films formed of an inorganic material such as silicon oxide or silicon nitride.

[0021] The source electrode WS and drain electrode WD of the switching element SW1 are formed on the third insulating film 13. The source electrode WS and drain electrode WD are electrically connected to the semiconductor layer SC through contact holes penetrating the second insulating film 12 and the third insulating film 13, respectively. The switching element SW1 is covered with a fourth insulating film 14. The fourth insulating film 14 is also disposed on the third insulating film 13. Such a fourth insulating film 14 is formed of an organic material such as a transparent resin.

[0022] The reflective layer 4 is formed on the fourth insulating film 14. The reflective layer 4 is made of a metal material having high light reflectance, such as aluminum or silver. The upper surface of the reflective layer 4 may be a flat surface or may be an uneven surface for imparting light scattering properties.

[0023] The organic EL elements OLED1 to OLED3 are formed on the fourth insulating film 14. That is, the organic EL elements OLED1 to OLED3 are located on the insulating substrate 10. In the illustrated example, the organic EL element OLED1 is electrically connected to the switching element SW1, the organic EL element OLED2 is electrically connected to the switching element SW2, and the organic EL element OLED3 is electrically connected to the switching element SW3. The organic EL elements OLED1 to OLED3 are configured as top emission types that emit green light, red light, and blue light toward the sealing substrate 20 side, respectively. Such organic EL elements OLED1 to OLED3 all have the same structure. In the illustrated example, the organic EL elements OLED1 to OLED3 are each partitioned by a rib 15.

[0024] The organic EL element OLED1 includes a pixel electrode PE1 formed on the reflective layer 4. The pixel electrode PE1 is in contact with the drain electrode WD of the switching element SW1 and is electrically connected to the switching element SW1. Similarly, the organic EL element OLED2 includes a pixel electrode PE2 electrically connected to the switching element SW2, and the organic EL element OLED3 includes a pixel electrode PE3 electrically connected to the switching element SW3. The pixel electrodes PE1, PE2, and PE3 are formed of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

[0025] For example, the organic EL element OLED1 includes an organic light-emitting layer ORGG that emits green light, the organic EL element OLED2 includes an organic light-emitting layer ORGR that emits red light, and the organic EL element OLED3 includes an organic light-emitting layer ORGB that emits blue light. The organic light-emitting layer ORGG is located on the pixel electrode PE1, the organic light-emitting layer ORGR is located on the pixel electrode PE2, and the organic light-emitting layer ORGB is located on the pixel electrode PE3.

[0026] The organic EL elements OLED1 to OLED3 include a common electrode CE. The common electrode CE is located on the organic light emitting layers ORGG, ORGR, and ORGB. The common electrode CE is also located on the rib 15. One of the pixel electrode PE and the common electrode CE is an anode, and the other is a cathode. The common electrode CE is formed of, for example, an MgAg alloy.

[0027] The sealing layer 41 seals the organic EL elements OLED1, OLED2, and OLED3. The sealing layer 41 also seals the members disposed between the sealing layer 41 and the insulating substrate 10. The sealing layer 41 suppresses the intrusion of oxygen and moisture into the organic EL elements OLED1, OLED2, and OLED3, and suppresses deterioration of the organic EL elements OLED1, OLED2, and OLED3. For example, the sealing layer 41 is composed of a laminate of an inorganic film, an organic film, and an inorganic film. The inorganic film constituting the sealing layer 41 is formed using, for example, silicon nitride.

[0028] The overcoat layer OC covers the sealing layer 41. The overcoat layer OC is located between the sealing layer 41 and the color filter layer CF. The overcoat layer OC is formed of, for example, an organic material such as a transparent resin.

[0029] The color filter layer CF covers the overcoat layer OC. That is, the color filter layer CF is located on the sealing layer 41. The color filter layer CF has a first color filter CF1 of a first color, a second color filter CF2 of a second color different from the first color, and a third color filter CF3 of a third color different from the first color and the second color.

[0030] The first color filter CF1 of the first color is, for example, a green color filter, the second color filter CF2 of the second color is, for example, a red color filter, and the third color filter CF3 of the third color is, for example, a blue color filter.

[0031] The first color filter CF1 overlaps with the organic EL element OLED1 that emits green light, the second color filter CF2 overlaps with the organic EL element OLED2 that emits red light, and the third color filter CF3 overlaps with the organic EL element OLED3 that emits blue light. The colors of the first color filter CF1, the second color filter CF2, and the third color filter CF3 are not limited to the above examples, and can be changed appropriately according to the emission colors of the organic EL elements OLED1 to OLED3.

[0032] The sealing substrate 20 is located on the color filter layer CF and is adhered to the color filter layer CF using an adhesive layer AD. That is, the adhesive layer AD is located between the color filter layer CF and the sealing substrate 20. The sealing substrate 20 may be a glass substrate or a flexible resin film.

[0033] The sealing substrate 20 has a display surface 20S on the opposite side to the surface in contact with the adhesive layer AD. That is, the display panel PNL has the display surface 20S on the opposite side to the insulating substrate 10 side with respect to the organic EL elements OLED1, OLED2, and OLED3.

[0034] In such a display device DSP, when each of the organic EL elements OLED1 to OLED3 emits light, the organic EL element OLED1 emits green light, the organic EL element OLED2 emits red light, and the organic EL element OLED3 emits blue light, thereby realizing color display of the display device DSP.

[0035] 1 is, for example, the minimum unit constituting a color image, and includes the above-mentioned organic EL elements OLED1 to OLED3. Specifically, the subpixel SPX1 includes the organic EL element OLED1, the subpixel SPX2 includes the organic EL element OLED2, and the subpixel SPX3 includes the organic EL element OLED3.

[0036] In the above configuration example, the organic EL elements OLED1 to OLED3 each include an organic light-emitting layer ORGG that emits green light, an organic light-emitting layer ORGR that emits red light, and an organic light-emitting layer ORGB that emits blue light, but the present invention is not limited to this. The organic EL elements OLED1 to OLED3 may include a common organic light-emitting layer. In this case, for example, the organic EL elements OLED1 to OLED3 emit white light. In this embodiment, since the display panel PNL includes a color filter layer CF, the display device DSP can display colors even when the organic EL elements OLED1 to OLED3 emit white light.

[0037] Moreover, the display panel PNL of this embodiment does not include a polarizing plate on the sealing substrate 20, and instead, a color filter layer CF is disposed on the sealing layer 41. Therefore, the color filter layer CF can suppress external light reflection at the common electrode CE and the reflective layer 4. Compared with the case where a polarizing plate is used to suppress external light reflection, the transmittance of light emitted from the organic EL elements OLED1 to OLED3 can be improved. Therefore, it is possible to suppress a decrease in display luminance and reduce power consumption. Moreover, since the color filter layer CF is thinner than the polarizing plate, the display panel PNL can be made thinner. Furthermore, the cost of using a polarizing plate can be reduced.

[0038] FIG. 3 is a plan view showing the layout of the color filter layer CF arranged in one pixel PX. Fig. 3(a) is a plan view showing the layout of a first color filter CF1 arranged in one pixel PX. Fig. 3(b) is a plan view showing the layout of a second color filter CF2 arranged in one pixel PX. Fig. 3(c) is a plan view showing the layout of a third color filter CF3 arranged in one pixel PX.

[0039] 3(a), the first color filter CF1 has a first opening OP1 and a second opening OP2. The first opening OP1 and the second opening OP2 are aligned in the second direction Y. The first color filter CF1 also has a first inner edge EG1 facing the first opening OP1 and a second inner edge EG2 facing the second opening OP2.

[0040] 3(b), the second color filter CF2 has a third opening OP3 and a fourth opening OP4. The third opening OP3 and the fourth opening OP4 are aligned in the second direction Y. The second color filter CF2 also has a third inner edge EG3 facing the third opening OP3 and a fourth inner edge EG4 facing the fourth opening OP4.

[0041] 3(c), the third color filter CF3 has a fifth opening OP5 and a sixth opening OP6. The fifth opening OP5 and the sixth opening OP6 are aligned in the first direction X. The third color filter CF3 also has a fifth inner edge EG5 facing the fifth opening OP5 and a sixth inner edge EG6 facing the sixth opening OP6.

[0042] Fig. 4 is a plan view showing the layout of the light-shielding area LSA of one pixel PX. The configuration shown in Fig. 4 corresponds to the configuration in which the first color filter CF1, the second color filter CF2, and the third color filter CF3 shown in Fig. 3 are overlapped in the third direction Z.

[0043] The display panel PNL has, in each pixel PX, a first pixel opening POP1 in which a first color filter CF1 is located, a second pixel opening POP2 in which a second color filter CF2 is located, and a third pixel opening POP3 in which a third color filter CF3 is located. The first pixel opening POP1, the second pixel opening POP2, and the third pixel opening POP3 correspond to regions that transmit light emitted from the organic EL elements OLED1 to OLED3.

[0044] The third pixel opening POP3 extends in the first direction X. The first pixel opening POP1 is aligned with the third pixel opening POP3 in the second direction Y. The second pixel opening POP2 is aligned with the third pixel opening POP3 in the second direction Y, and aligned with the first pixel opening POP1 in the first direction X.

[0045] The first pixel opening POP1 overlaps with the fourth opening OP4 of the second color filter CF2 and the fifth opening OP5 of the third color filter CF3. The second pixel opening POP2 overlaps with the second opening OP2 of the first color filter CF1 and the sixth opening OP6 of the third color filter CF3. The third pixel opening POP3 overlaps with the first opening OP1 of the first color filter CF1 and the third opening OP3 of the second color filter CF2.

[0046] The display panel PNL has a light-shielding area LSA surrounding each of the first pixel opening POP1, the second pixel opening POP2, and the third pixel opening POP3. As described later, the light-shielding area LSA is configured by stacking a first color filter CF1, a second color filter CF2, and a third color filter CF3 on top of each other. The light-shielding area LSA corresponds to an area that blocks light emitted from the organic EL elements OLED1 to OLED3.

[0047] Fig. 5 is a cross-sectional view of the display panel PNL taken along the line AB shown in Fig. 4. Fig. 5 illustrates the configuration of layers above the overcoat layer OC. The first color filter CF1, the second color filter CF2, and the third color filter CF3 are stacked in the third direction Z in the light-shielding region LSA. That is, the first color filter CF1, the second color filter CF2, and the third color filter CF3 are stacked in the light-shielding region LSA from the insulating substrate 10 side toward the display surface 20S side. More specifically, in the light-shielding region LSA, the first color filter CF1 is in contact with the overcoat layer OC, the second color filter CF2 is located on the first color filter CF1, and the third color filter CF3 is located on the second color filter CF2.

[0048] At the first pixel opening POP1, the first color filter CF1 contacts the overcoat layer OC. At the second pixel opening POP2, the second color filter CF2 contacts the overcoat layer OC. At the second pixel opening POP2, the second color filter CF2 is located inside the second opening OP2.

[0049] The second inner edge EG2 of the first color filter CF1 is covered by the second color filter CF2. The fourth inner edge EG4 of the second color filter CF2 and the fifth inner edge EG5 and sixth inner edge EG6 of the third color filter CF3 are in contact with the adhesive layer AD.

[0050] FIG. 6 is a cross-sectional view of the display panel PNL taken along the line CD shown in FIG. The first color filter CF1, the second color filter CF2, and the third color filter CF3 are laminated in the light-shielding region LSA from the insulating substrate 10 side toward the display surface 20S side.

[0051] In the third pixel opening POP3, the third color filter CF3 is in contact with the overcoat layer OC. In the third pixel opening POP3, the third color filter CF3 is located inside the first opening OP1.

[0052] A first inner edge EG1 of the first color filter CF1 is covered by the third color filter CF3. A second inner edge EG2 of the first color filter CF1 is covered by the second color filter CF2. A third inner edge EG3 of the second color filter CF2 is covered by the third color filter CF3. A sixth inner edge EG6 of the third color filter CF3 is in contact with the adhesive layer AD.

[0053] FIG. 7 is a cross-sectional view of the display panel PNL taken along the line EF shown in FIG. The first color filter CF1, the second color filter CF2, and the third color filter CF3 are laminated in the light-shielding region LSA from the insulating substrate 10 side toward the display surface 20S side.

[0054] The first inner edge EG1 of the first color filter CF1 is covered by the third color filter CF3. The third inner edge EG3 of the second color filter CF2 is covered by the third color filter CF3. The fourth inner edge EG4 of the second color filter CF2 and the fifth inner edge EG5 of the third color filter CF3 are in contact with the adhesive layer AD.

[0055] The display panel PNL of this embodiment does not include a light-shielding layer in the display area DA. However, for example, when an organic electroluminescence display device includes a light-shielding layer, the light-shielding layer is formed by low-temperature curing. Therefore, in the process of forming the color filter layer CF after forming the light-shielding layer, the uncured part of the light-shielding layer may react during development of the color filter layer CF, causing a film loss of the light-shielding layer. In particular, in the process of forming the color filter layer CF, a film loss of the light-shielding layer is likely to occur when forming the first color filter CF1 of the first color. In addition, in order to suppress the film loss of the light-shielding layer, a post-exposure process is performed on the light-shielding layer, but a high exposure dose causes a high manufacturing load.

[0056] According to this embodiment, the light-shielding area LSA is formed by stacking the first color filter CF1, the second color filter CF2, and the third color filter CF3. Therefore, it is possible to suppress the occurrence of the above-mentioned thinning of the light-shielding layer, and to eliminate the manufacturing burden when forming the light-shielding layer. In addition, it is possible to reduce the cost when forming the light-shielding layer.

[0057] [Second embodiment] Next, the configuration of a second embodiment will be described with reference to FIGS.

[0058] Fig. 8 is a plan view showing the layout of the light-shielding region LSA and the groove portion GR of one pixel PX. The configuration shown in Fig. 8 is different from the configuration shown in Fig. 4 in that the display panel PNL has the groove portion GR. The groove portion GR overlaps with the light-shielding area LSA. The groove portion GR surrounds each of the first pixel opening POP1, the second pixel opening POP2, and the third pixel opening POP3.

[0059] Fig. 9 is a cross-sectional view of the display panel PNL taken along the line AB shown in Fig. 8. The configuration shown in Fig. 9 is different from the configuration shown in Fig. 5 in that the overcoat layer OC has a groove portion GR.

[0060] The overcoat layer OC has a groove GR at a position overlapping the light-shielding area LSA. The groove GR is formed on an upper surface OCU of the overcoat layer OC. The first color filter CF1, the second color filter CF2, and the third color filter CF3 are stacked on top of each other at positions overlapping with the groove GR. A portion of the first color filter CF1 is located inside the groove GR. Also, a portion of the second color filter CF2 is located inside the groove GR.

[0061] An upper surface 1U of the first color filter CF1 in the first pixel aperture POP1, an upper surface 2U of the second color filter CF2 in the second pixel aperture POP2, and an upper surface 3U of the third color filter CF3 in the light-shielded area LSA are located on approximately the same plane. The depth DP of the groove portion GR is, for example, approximately equal to the sum of the film thickness TH1 of the first color filter CF1 and the film thickness TH2 of the second color filter CF2.

[0062] The second inner edge EG2 of the first color filter CF1 contacts the overcoat layer OC inside the groove portion GR. The fourth inner edge EG4 of the second color filter CF2 contacts the first color filter CF1. The fifth inner edge EG5 of the third color filter CF3 contacts the first color filter CF1. The sixth inner edge EG6 of the third color filter CF3 contacts the second color filter CF2.

[0063] According to the second embodiment, the overcoat layer OC has the groove portion GR. Therefore, the step of the color filter layer CF in the light-shielding area LSA can be reduced. Therefore, undesired diffuse reflection of light due to the step of the color filter layer CF can be suppressed.

[0064] The groove portion GR has a bottom surface BS and a side surface SS rising from the bottom surface BS. The angle between the bottom surface BS and the side surface SS inside the groove portion GR is about 90 degrees. By making the groove portion GR highly tapered, the step of the color filter layer CF in the light-shielding area LSA can be further reduced.

[0065] Fig. 10 is a cross-sectional view of the display panel PNL taken along line CD shown in Fig. 8. The configuration shown in Fig. 10 differs from the configuration shown in Fig. 6 in that the overcoat layer OC has a groove portion GR. A part of the first color filter CF1 is located inside the groove portion GR, and a part of the second color filter CF2 is located inside the groove portion GR.

[0066] An upper surface 2U of the second color filter CF2 in the second pixel aperture POP2, an upper surface 3U of the third color filter CF3 in the third pixel aperture POP3, and an upper surface 3U of the third color filter CF3 in the light-shielded area LSA are located on approximately the same plane.

[0067] A first inner edge EG1 of the first color filter CF1 contacts the second color filter CF2. A second inner edge EG2 of the first color filter CF1 contacts the second color filter CF2. A third inner edge EG3 of the second color filter CF2 contacts the overcoat layer OC inside the groove portion GR. A sixth inner edge EG6 of the third color filter CF3 contacts the second color filter CF2.

[0068] Fig. 11 is a cross-sectional view of the display panel PNL taken along the line EF shown in Fig. 8. The configuration shown in Fig. 11 differs from the configuration shown in Fig. 7 in that the overcoat layer OC has a groove portion GR. A part of the first color filter CF1 is located inside the groove portion GR, and a part of the second color filter CF2 is located inside the groove portion GR.

[0069] An upper surface 1U of the first color filter CF1 in the first pixel aperture POP1, an upper surface 3U of the third color filter CF3 in the third pixel aperture POP3, and an upper surface 3U of the third color filter CF3 in the light-shielded area LSA are located on approximately the same plane.

[0070] A first inner edge EG1 of the first color filter CF1 contacts the overcoat layer OC inside the groove portion GR. A third inner edge EG3 of the second color filter CF2 contacts the third color filter CF3. A fourth inner edge EG4 of the second color filter CF2 contacts the first color filter CF1. A fifth inner edge EG5 of the third color filter CF3 contacts the first color filter CF1.

[0071] As described above, according to this embodiment, it is possible to obtain a display device that can reduce the manufacturing load and the cost.

[0072] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0073] DSP: display device, PX: pixel, 10: insulating substrate, ORGG, ORGR, ORGB...Organic light-emitting layer, OLED1, OLED2, OLED3... Organic electroluminescence elements, 41: sealing layer, CF: color filter layer, CF1: first color filter, CF2: second color filter; CF3: third color filter; POP1: first pixel opening; POP2: second pixel opening; POP3: third pixel opening; LSA...shading area, 20S...display surface, OP1...first aperture, OP2...second aperture, OP3...Third opening, OP4...Fourth opening, OP5...Fifth opening, OP6...Sixth opening, OC: overcoat layer, GR: groove portion.

Claims

1. A plurality of pixels; An insulating substrate; an organic electroluminescence element located on the insulating substrate and including an organic light-emitting layer; a sealing layer that seals the organic electroluminescence element; a color filter layer located on the sealing layer, the color filter layer having a first color filter of a first color, a second color filter of a second color different from the first color, and a third color filter of a third color different from the first color and the second color; In each of the pixels, a first pixel opening in which the first color filter is located, a second pixel opening in which the second color filter is located, and a third pixel opening in which the third color filter is located; a light-shielding region surrounding the first pixel opening, the second pixel opening, and the third pixel opening, respectively, and in which the first color filter, the second color filter, and the third color filter are stacked on top of each other.

2. a display surface on the opposite side of the organic electroluminescence element from the insulating substrate, The display device according to claim 1 , wherein the first color filter, the second color filter, and the third color filter are stacked in the light-shielding region from the insulating substrate side toward the display surface side.

3. the first color filter has a first opening at a position overlapping the third pixel opening and a second opening at a position overlapping the second pixel opening; the second color filter has a third opening at a position overlapping the third pixel opening and a fourth opening at a position overlapping the first pixel opening; The display device according to claim 1 , wherein the third color filter has a fifth opening at a position overlapping the first pixel opening, and a sixth opening at a position overlapping the second pixel opening.

4. an overcoat layer located between the sealing layer and the color filter layer; the overcoat layer has a groove portion overlapping the light-shielding region, the first color filter, the second color filter, and the third color filter are stacked on one another at positions overlapping the groove portion; The display device according to claim 1 , wherein a portion of the first color filter is located inside the groove.

5. The display device according to claim 4 , wherein the groove portion surrounds each of the first pixel opening, the second pixel opening, and the third pixel opening.

6. the third pixel opening extends in a first direction; the first pixel openings are aligned in a second direction intersecting the first direction of the third pixel openings, The display device according to claim 1 , wherein the second pixel opening is aligned in the second direction with the third pixel opening and aligned in the first direction with the first pixel opening.

Images