JP2016045307A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device that curbs reflection light in holding capacitor wiring among pixel electrodes.SOLUTION: A display device according to one embodiment of the present invention has: a plurality of pixels that includes a holding capacitor electrode facing a pixel electrode via an insulative film; and a member that is arranged among the plurality of pixels, and has a function curbing reflection light. The display device may further have: a bank layer to be arranged among the plurality of pixels; an OLED light emitting layer that is arranged on the pixel electrode and bank layer; a negative pole that is arranged on the OLED light emitting layer; an encapsulation film that is arranged on the negative pole; and a filler to be arranged on the encapsulation film. Further, the member having the function curbing the reflection light may be a light absorber. Furthermore, the member having the function curbing the reflection light may be a reflection reduction layer.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a display device, and more particularly to a technique for preventing light leakage to an adjacent pixel and unnecessary color mixing.

  In recent years, there is an increasing demand for high definition and low power consumption in light emitting display devices for mobile use. Examples of mobile display devices include liquid crystal display devices (LCDs), display devices that use self-luminous elements (OLEDs) such as organic EL display devices, and electronic paper. It has been adopted.

  Among them, the development of organic EL display devices is being promoted for the purpose of reducing the thickness of the display panel, increasing the brightness, and increasing the speed. The organic EL display device is a display device having pixels composed of OLEDs, has a high reaction speed because there is no mechanical operation, and each pixel itself emits light, enabling high luminance display, Since a backlight light source and a polarizing plate are not required, the thickness can be reduced, which is expected as a next-generation display device.

  A holding (auxiliary) capacitor electrode made of metal is arranged on the lower layer of the pixel electrode that acts as an anode of the OLED element through an insulating film to form a holding capacitor, and the holding capacitor electrode of the adjacent pixel is connected to the holding capacitor wiring For example, there is Patent Document 1 as a display device connected in the above. FIG. 14 is a cross-sectional view of a display device according to the prior art, and shows the structure of the display device in which the above-described storage capacitor electrode is arranged. Here, a part of the light 92 emitted in an oblique direction from the OLED element is reflected by the interface of the layers having different refractive indexes, then reflected again by the storage capacitor wiring between the pixel electrodes, and proceeds to the adjacent pixel. Since the light 95 traveling to the adjacent pixel is superimposed on the light that should be originally displayed on the adjacent pixel, light leakage or unnecessary color mixing occurs and affects display characteristics.

JP 2009-109519 A

  An object of the present invention is to provide a display device in which reflected light from a storage capacitor wiring between pixel electrodes is suppressed.

  A display device according to an embodiment of the present invention includes a plurality of pixels including a storage capacitor electrode facing a pixel electrode through an insulating film, and a member that is disposed between the plurality of pixels and has a function of suppressing reflected light. Have

  Moreover, the bank layer arrange | positioned between several pixels, the OLED light emitting layer arrange | positioned on a pixel electrode and a bank layer, the cathode arrange | positioned on an OLED light emitting layer, and the sealing film arrange | positioned on a cathode And a filler disposed on the sealing film.

  The member having a function of suppressing reflected light may be a light absorber.

  The light absorber may be made of a photosensitive resin containing a black pigment.

  The light absorber may be arranged on the storage capacitor electrode.

  The light absorber may be arranged on the insulating film.

  The light absorber may be disposed on the bank layer.

  Further, the member having a function of suppressing reflected light may be a light scatterer.

  The light scatterer may be arranged on the storage capacitor electrode.

  In addition, the light scatterer may be a photosensitive resin containing fine particles having a refractive index different from that of the insulating film.

  Further, the light scatterer may be characterized in that irregularities are formed on the surface of the storage capacitor electrode on the insulating film side.

  Further, the member having a function of suppressing reflected light may be a reflection reducing layer.

  The reflection reducing layer may be made of a dielectric laminated film, and the refractive index of the dielectric laminated film may be different from the refractive index of the insulating film.

It is a figure which shows the perspective view of the display apparatus in one Embodiment of this invention. It is a figure which shows the top view of the display apparatus in one Embodiment of this invention. It is a figure which shows the pixel circuit of the display apparatus in one Embodiment of this invention. It is a figure which shows the top view of the pixel circuit of the display apparatus in 1st Embodiment of this invention. It is a figure which shows sectional drawing of the pixel circuit of the display apparatus in 1st Embodiment of this invention. It is a figure which shows sectional drawing of the pixel circuit of the display apparatus in the modification 1 of 1st Embodiment of this invention. It is a figure which shows the top view of the pixel circuit of the display apparatus in the modification 2 of 1st Embodiment of this invention. It is a figure which shows the top view of the pixel circuit of the display apparatus in the modification 3 of 1st Embodiment of this invention. It is a figure which shows the top view of the pixel circuit of the display apparatus in the modification 4 of 1st Embodiment of this invention. It is a figure which shows the top view of the pixel circuit of the display apparatus in 2nd Embodiment of this invention. It is a figure which shows sectional drawing of the pixel circuit of the display apparatus in 2nd Embodiment of this invention. It is a figure which shows the top view of the pixel circuit of the display apparatus in 3rd Embodiment of this invention. It is a figure which shows sectional drawing of the pixel circuit of the display apparatus in 3rd Embodiment of this invention. It is a figure which shows sectional drawing of the display apparatus in a prior art.

  Embodiments of the present invention will be described below with reference to the drawings. It should be noted that the disclosure is merely an example, and those 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 schematically represented with respect to the width, thickness, shape, and the like of each part in comparison with actual aspects for the sake of clarity of explanation, but are merely examples, and the interpretation of the present invention is not limited. It is not limited. In addition, in the present specification and each drawing, elements similar to those described above with reference to the previous drawings are denoted by the same reference numerals, and detailed description may be omitted as appropriate.

<Embodiment 1>
The configuration of the display device according to the first embodiment will be described with reference to FIGS. In the first embodiment, the light absorber 31 is used as a member having a function of suppressing reflected light.

[Outline of display device]
First, the outline of the display device according to the embodiment will be described with reference to FIGS. FIG. 1 is a diagram showing a perspective view of a display device according to Embodiment 1 of the present invention. Moreover, FIG. 2 is a figure which shows the top view of the display apparatus in Embodiment 1 of this invention.

  As shown in FIGS. 1 and 2, the display device in Embodiment 1 includes a substrate 200 having a display region 210 in which a light emitting element is provided in each of a plurality of pixels, and pixel electrodes 40 are arranged in a matrix. It includes a counter substrate 300 facing the driver IC, a driver IC 400 provided in a region where the counter substrate 300 is exposed, and an FPC (Flexible Printed Circuits) 500. The substrate 200 is divided into a display area 210 and a peripheral area 220 located around the display area 210. In the counter substrate 300, the pixel electrodes 40 are arranged in a matrix in the display region 210, and the pixel circuits described in the embodiment are disposed in each of the plurality of pixel electrodes 40. The FPC 500 includes a terminal portion 600 that is connected to a controller circuit that controls the drive circuit.

  Referring to FIG. 2, in the display area 210, scanning signal lines 61 are arranged in the horizontal direction, and video signal lines 62 and drive power supply lines 63 are arranged in a matrix in the vertical direction. The pixel electrode 40 corresponds to a region surrounded by the scanning signal line 61, the video signal line 62, and the drive power supply line 63. In FIG. 2, the pixel electrode 40 and the region surrounded by the scanning signal line 61, the video signal line 62, and the drive power supply line 63 are illustrated for the sake of explanation without overlapping, but the pixel electrode 40 and these lines are on a plane. They may be placed one on top of the other.

[Pixel circuit diagram]
Next, the pixel circuit of the embodiment will be described with reference to FIG.

  As shown in FIG. 3, the pixel circuit 12 according to the first embodiment includes a control TFT 71, a drive TFT 72, and a storage capacitor 73. For example, when an n-type semiconductor is used for the control TFT 71 and the drive TFT 72, the gate of the control TFT 71 is connected to the scanning signal line 61, the source is connected to the video signal line 62, the drain is one end of the storage capacitor 73, and the gate of the drive TFT 72. Connected to. The drain of the drive TFT 72 is connected to the drive power supply line 63, and the source is connected to the pixel electrode 40. The pixel electrode 40 is connected to the other end of the storage capacitor 73, the anode of the OLED element 74, and one end of the storage capacitor 36. The other end of the storage capacitor 36 is a storage capacitor electrode 30. The storage capacitor electrodes 30 corresponding to the adjacent pixels are connected to each other by a storage capacitor wiring 35. Although not shown in FIG. 3, the storage capacitor electrodes 30 in the vertical direction are also connected by the storage capacitor wiring 35.

  When a predetermined voltage is applied to the gate of the control TFT 71, the control TFT 71 gives a potential corresponding to the video signal line 62 to the storage capacitor 73. A potential of the gate of the driving TFT 72 is held by the storage capacitor 73, and a current corresponding to the charge of the storage capacitor 73 is supplied from the drive power supply line 63 to the anode of the OLED element 74. The cathode of the OLED element 74 is connected to the ground electrode or the negative potential cathode 18.

[Pixel configuration]
Next, the configuration of the light absorber 31 in the first embodiment will be described with reference to FIGS.

  FIG. 4 is a plan view of the light absorber 31 according to the first embodiment, and is an enlarged view of a portion in which three pixel electrodes 40 are arranged vertically and four horizontally. The pixel electrode 40 is formed in a rectangular shape, the opening 42 of the storage capacitor electrode 30 is formed in the upper right portion, and the light emitting portion 41 is formed in an L shape in a portion excluding the region where the opening 42 is formed. ing. A bank layer 16 (not shown) is disposed between adjacent pixel electrodes 40 and in a region where the opening 42 is disposed. The light emitting unit 41 is an area where the bank layer 16 (not shown) is not disposed, and the OLED light emitting layer 17 (not shown) actually emits light.

  The light absorber 31 is disposed between the pixel electrodes 40 adjacent in the vertical and horizontal directions. The light absorber 31 is desirably arranged to have a width corresponding to the interval between the adjacent pixel electrodes 40. More preferably, as shown in FIG. 4, it is desirable that the gap be arranged wider than the interval between the pixel electrodes 40.

  FIG. 5 is a cross-sectional view taken along the line A-A ′ of FIG. 4 in the pixel circuit of the display device according to the first embodiment.

  A pixel circuit 12 is disposed on the lower substrate 11, and an interlayer insulating film 13 is disposed on the lower substrate 11 and the pixel circuit 12. Here, the lower substrate 11 may be formed of glass, resin, or the like, and the interlayer insulating film 13 may be formed by laminating a plurality of layers formed of an inorganic material such as silicon nitride or silicon oxide on the lower side. The video signal line 62 and the drive power supply line 63 (both not shown) are appropriately arranged. Further, a planarization layer made of an organic material such as acrylic or polyimide may be formed above the interlayer insulating film 13.

  A storage capacitor electrode 30 and a storage capacitor line 35 are disposed on the interlayer insulating film 13. Here, the storage capacitor electrode 30 and the storage capacitor wiring 35 are formed by laminating the same member on the interlayer insulating film 13, and a portion facing a pixel electrode 40 described later functions as the storage capacitor electrode 30. The other portions such as 40 function as the storage capacitor wiring 35. Hereinafter, for the sake of simplicity, the storage capacitor electrode 30 and the storage capacitor wiring 35 will be collectively described as the storage capacitor electrode 30.

  On the storage capacitor electrode 30, the light absorber 31 is disposed in a portion corresponding to the space between the adjacent pixel electrodes 40. For the light absorber 31, a photosensitive resin containing a pigment having a black pigment such as carbon black or titanium black may be used. When this material is used, the photosensitive resin can be processed using a general photolithography apparatus, so that a light absorber having a desired pattern shape as shown in FIG. 4 can be formed. In addition, the light absorber so that the light 94 that has reached the light absorber 31 passes through the light absorber 31 and is reflected by the storage capacitor electrode 30 and then is sufficiently absorbed by the path that passes through the light absorber 31 again. It is desirable to set the thickness of 31 according to the absorption coefficient of the light absorber 31.

  A contact hole 14 for electrically connecting the pixel electrode 40 and the pixel circuit 12 is disposed in the interlayer insulating film 13. An opening 42 is formed in the storage capacitor electrode 30 so that the contact hole 14 does not contact the storage capacitor electrode 30. A capacitor insulating film 15 is formed on the storage capacitor electrode 30, the light absorber 31, the contact hole 14, and the interlayer insulating film 13. A pixel electrode 40 is formed on the capacitor insulating film 15. A contact hole 14 for electrically connecting the pixel electrode 40 and the pixel circuit 12 is formed on the interlayer insulating film 13 of the capacitor insulating film 15. The storage capacitor electrode 30 faces the pixel electrode 40 with the capacitor insulating film 15 interposed therebetween, and forms a storage capacitor 36.

  A bank layer 16 for partitioning pixels is formed in a region where the pixel electrode 40 is not disposed. A bank layer 16 is also formed in a region where the contact hole 14 is disposed. The bank layer 16 is made of a transparent insulating organic material such as acrylic or polyimide. An OLED light emitting layer 17, a cathode 18, and a sealing film 19 are sequentially stacked on the bank layer 16 and the pixel electrode 40, and a filler 20 is formed on the sealing film 19. The OLED light emitting layer 17, the cathode 18, and the sealing film 19 stacked on the bank layer 16 are rounded along the shape of the bank layer 16. Color filters 21, 22, and 23 are disposed on the filler 20. A black matrix 24 is formed on the bank layer 16. An upper substrate 25 is formed on the color filters 21, 22, 23 and the black matrix 24.

  When a predetermined voltage is applied between the pixel electrode 40 and the cathode 18, the OLED light emitting layer 17 between the pixel electrode 40 and the cathode 18 emits light, and light emitted from the OLED light emitting layer 17 extends in all directions. The light 91 emitted upward from the OLED light emitting layer 17 passes through the cathode 18, the sealing film 19, and the filler 20, passes through the color filter 22, and is emitted as light of a desired color. On the other hand, the light 92 emitted from the OLED light emitting layer 17 in an oblique direction reaches a point P that is an interface between the sealing film 19 and the filler 20. The refractive index of the sealing film 19 and the filler 20 is generally different, and the interface between the sealing film 19 and the filler 20 in the vicinity of the bank layer 16 is rounded along the shape of the bank layer 16, so that OLED emission Reflection and refraction of light occur depending on the angle of light emitted from the layer 17 and the angle of the interface. FIG. 6 shows that light 93 refracted in the same direction as the light 92 and light 94 reflected at the point P toward the bank layer 16 are generated.

  Since the light 93 enters the black matrix 24 and is attenuated, it does not pass through the color filter 21 of the adjacent pixel and is not emitted to the outside. Unlike the first embodiment, when the light absorber 31 is not formed in a corresponding portion between adjacent pixel electrodes 40, the light 94 is reflected at the point Q. The light 95 ′ is assumed to be reflected at the point Q. When the light 95 ′ does not enter the pixel electrode 40 and the black matrix 24, the light 95 ′ passes through the color filter 21 that is an adjacent pixel and is emitted to the outside.

  As described above, in the first embodiment, the light absorber 31 is disposed on the storage capacitor electrode 30 in a portion corresponding to between the adjacent pixel electrodes 40. Since the light absorber 31 is arranged, the light 94 reflected at the point P is absorbed by the light absorber 31 and no reflected light directed to the adjacent pixel is generated. As a result, it is possible to prevent light leakage and unnecessary color mixing to pixels adjacent in the vertical and horizontal directions, and to improve the display characteristics of the display device.

  In the present invention, it is assumed that the OLED light emitting layer 17 emits white light and the color filters 21 to 23 are present. In the case where there is no color filter and the OLED light emitting layer emits light in red, green, and blue colors for each sub-pixel, the emitted light that has been reflected by the points P and Q has a different color from the light 91. This is because there is no color mixing problem.

(Modification 1)
In the first embodiment, the light absorber 31 is disposed in contact with the storage capacitor electrode 30, but the present invention is not limited to this. The light absorber 31 may be disposed at a position that prevents light reflected at the interface between the sealing film 19 and the filler 20 near the bank layer 16 from traveling to the storage capacitor electrode 30.

  FIG. 6 is a diagram illustrating a cross-sectional view of a pixel circuit of the display device according to the first modification of the first embodiment. 5 is compared with FIG. 6 in that the light absorber 31 is disposed on the capacitive insulating film 15 in FIG. Referring to FIG. 6, it can be seen that the light absorber 31 disposed on the capacitor insulating film 15 absorbs the light 94 reflected at the point P and does not travel to the storage capacitor electrode 30.

  In FIG. 6, the light absorber 31 is disposed over the entire region where the pixel electrode 40 is not disposed, and the capacitive insulating film 15 is covered with the light absorber 31 or the pixel electrode 40. Is not limited to this. When the light absorber 31 is disposed on the capacitive insulating film 15 as in Modification 1, the position where the light absorber 31 is disposed is closer to the point P as compared to FIG. In order to prevent reflection from the storage capacitor electrode 30 and heading to the adjacent pixel, the light absorber 31 may be formed narrower than the interval between the adjacent pixel electrodes 40.

  Further, unlike the first modification, for example, the capacitor insulating film 15 may have a multilayer structure, and the light absorber 31 may be disposed inside the capacitor insulating film 15. Further, the light absorber 31 may be disposed on or inside the bank layer 16.

(Modification 2)
FIG. 7 is a diagram illustrating a plan view of a pixel circuit of the display device according to the second modification of the first embodiment. 4 and FIG. 7 is different from FIG. 7 in that the light absorber 31 is arranged on the upper, lower, left, and right sides of the adjacent pixel electrode 40 and is not arranged in an oblique direction. Since the distance between the pixel electrodes 40 diagonally adjacent to each other is longer than the distance between the pixel electrodes 40 adjacent to each other vertically or horizontally, the influence of light leakage and unnecessary color mixing between the pixels adjacent to each other diagonally is the pixel adjacent to the pixel vertically. Less than the effect between. Therefore, even if the light absorber 31 is not disposed in the diagonal direction of the pixel electrode 40, the influence of unnecessary color mixing is small, but on the other hand, the manufacturing cost of the light absorber 31 can be reduced as compared with the first embodiment. become.

  Further, for example, in the case of a display device in which pixels emitting the same color in the vertical direction are arranged, the influence of unnecessary color mixing between pixels of the same color is relatively small. Therefore, the light absorber 31 is provided in the vertical direction of the pixel electrode 40. It is possible to adopt a configuration in which no arrangement is made.

(Modification 3)
FIG. 8 is a diagram illustrating a plan view of a pixel circuit of the display device in the third modification of the first embodiment. Comparing FIG. 8 and FIG. 7, in each case, the light absorber 31 is disposed on the top, bottom, left and right of the adjacent pixel electrode 40, but in FIG. 8, the light absorber 31 is not disposed near the opening 42. The point is different.

  As shown in FIG. 8, an opening 42 exists near the apex of the rectangular pixel electrode 40, and the light emitting unit 41 forms an L shape. In the vicinity where the opening 42 of the light emitting unit 41 adjacent to the upper and lower sides is present, the interval between the light emitting units 41 is relatively wide, so that the light reflected at the interface between the sealing film 19 and the filler 20 The possibility of reaching the formed layer is low. In addition, a contact hole 14 (not shown) exists in the opening 42 and functions as an obstacle for light reflected at the interface between the sealing film 19 and the filler 20. Therefore, reflection of the storage capacitor electrode 30 can be suppressed without forming the light absorber 31 in the vicinity of the opening 42. By adopting such a configuration, the manufacturing cost can be further reduced as compared with the second modification. In the third modification, as described in the description of the second modification, when pixels emitting the same color are adjacent to each other, the light absorber 31 may not be disposed between the pixel electrodes 40. Is possible.

(Modification 4)
FIG. 9 is a diagram illustrating a plan view of a pixel circuit of the display device according to the fourth modification of the first embodiment. In the fourth modification, a photosensitive resin containing a pigment having an absorption band in the wavelength range of light displayed in adjacent pixels is used for the light absorber 31.

  In FIG. 9, a light emitting unit 41r for displaying red, a light emitting unit 41g for displaying green, a light emitting unit 41b for displaying blue, and a light emitting unit 41r for displaying red are arranged in order from the left, and the same color in the vertical direction. A light emitting unit 41r, 41g, or 41b for displaying is arranged.

  In order to suppress color mixture due to light traveling from the light emitting portion 41r of the pixel displaying red toward the adjacent pixel displaying green, the component in the green wavelength region of this light may be absorbed by the light absorber. On the other hand, in order to suppress color mixture due to light traveling from the light emitting portion 41g of the pixel displaying green to the adjacent pixel displaying red, the component in the red wavelength region of this light may be absorbed by the light absorber. In order to realize these simultaneously, a light absorber that has absorption bands in the green wavelength region and the red wavelength region displayed by the pixels on both sides of the light absorber and transmits light in the blue wavelength region may be used. Therefore, the light absorber 31b that transmits the blue wavelength region is disposed between the pixel electrode 40 having the light emitting portion 41r and the pixel electrode 40 having the light emitting portion 41g. Similarly, between the pixel electrode 40 having the light emitting portion 41g and the pixel electrode 40 having the light emitting portion 41b, a light absorber 31r that transmits the red wavelength region is disposed, and the pixel electrode 40 having the light emitting portion 41b emits light. Between the pixel electrode 40 which has the part 41r, the light absorber 31g which permeate | transmits a green wavelength range is arrange | positioned.

  The description regarding the absorption band described above also applies to pixels of the same color that are vertically adjacent to each other, but it is not always necessary to add colors other than red, green, and blue. For example, an absorption band in the red wavelength range may be present between pixels displaying red, and an absorber that transmits light in the cyan wavelength range may be used, but absorption that transmits light in the green or blue wavelength range may be used. It may be the body. Here, a light absorber 31b that transmits the blue wavelength region is disposed between the pixel electrodes 40 having the red light emitting portion 41r, and the red wavelength region is transmitted between the pixel electrodes 40 having the green light emitting portion 41g. A light absorber 31g that transmits the green wavelength region is disposed between the pixel electrodes 40 having the blue light emitting portion 41b.

<Embodiment 2>
Next, the configuration of the display device according to the second embodiment will be described with reference to FIGS. In the second embodiment, a light scatterer 32 is used as a member having a function of suppressing reflected light. Note that the second embodiment and the first embodiment are common to portions that are not particularly mentioned.

  FIG. 10 is a plan view of the light scatterer 32 in the second embodiment. Similar to FIG. 4, the light scatterer 32 is disposed between the pixel electrodes 40 adjacent in the vertical and horizontal directions.

  FIG. 11 is a cross-sectional view taken along line A-A ′ of FIG. 10 in the pixel circuit of the display device according to the second embodiment.

  Referring to FIG. 11, the light scatterer 32 is disposed on the storage capacitor electrode 30 with a corresponding width between adjacent pixel electrodes 40. For the light scatterer 32, a photosensitive resin containing fine particles having a refractive index different from that of the capacitive insulating film 15 may be used. Alternatively, the light scatterer 32 may be formed by forming irregularities on a part of the upper surface of the storage capacitor electrode 30.

  When the light 94 reflected at the point P reaches the point Q2 of the light scatterer 32, the light 94 is dispersed and reflected on the upper side of the light scatterer 32. Although the light 96 that is a part of the reflected light may pass through the color filter 21 of the adjacent pixel and cause color mixing, the light 96 is only a part of the reflected light scattered by the light 95. The influence of color mixing can be suppressed.

(Modification)
The arrangement on the plane of the light scatterer 32 in the second embodiment is the same as in the second and third modifications of the first embodiment. Regarding the arrangement of the light scatterers 32 in the cross section, as in the first modification of the first embodiment, the light scatterers 32 are not necessarily arranged in contact with the storage capacitor electrode 30. However, the light scatterer 32 is disposed in contact with the storage capacitor electrode 30 from the viewpoint of reducing as much as possible the light reflected by the light scatterer 32 at an angle causing color mixing. Is preferred.

<Embodiment 3>
Next, the configuration of the display device according to the third embodiment will be described with reference to FIGS. In the third embodiment, the reflection reducing layer 33 is used as a member having a function of suppressing reflected light. It should be noted that Embodiments 3 and 1 are common to portions that are not particularly mentioned.

  FIG. 12 is a plan view of the reflection reducing layer 33 in the third embodiment. Since the reflection reducing layer 33 is laminated on the storage capacitor electrode 30 (not shown), the reflection reducing layer 33 is arranged in a region excluding the opening 42 on the plane.

  FIG. 13 is a cross-sectional view taken along line A-A ′ of FIG. 12 in the pixel circuit of the display device according to the third embodiment.

  Referring to FIG. 13, the reflection reducing layer 33 is stacked on the storage capacitor electrode 30. The reflection reducing layer 33 is made of a material having a property of reducing the reflection of light. For example, a dielectric laminated film having a refractive index different from the refractive index of the capacitive insulating film 15 is used. The material is a laminated film in which a plurality of dielectric thin films such as silicon nitride, silicon oxide, titanium oxide, zirconium oxide, and aluminum oxide are repeatedly laminated, and the storage capacitor electrode 30 and the storage capacitor wiring 35 are patterned by a photolithography process. In this case, the reflection reduction layer 33 may be manufactured by batch processing. In this case, it is desirable to adjust the film thickness of each layer so that light incident on the dielectric laminated film and reflected light from the storage capacitor electrode 30 are weakened by optical interference.

  When the light 94 reflected at the point P reaches the point Q3 of the reflection reducing layer 33, the light 97 reflected at the point Q3 proceeds. The light 97 passes through the color filter 21 of the adjacent pixel, but the intensity of the light 97 reflected by the reflection reducing layer 33 is reduced compared to the light 94, so that the influence of color mixing is suppressed. Can do.

(Modification)
Regarding the arrangement of the reflection reducing layer 33 on the plane in the third embodiment, it may be arranged between the adjacent pixel electrodes 40 as in the first embodiment and the modifications 2 and 3. Regarding the arrangement of the reflection reducing layer 33 in the cross section, it is not always necessary to be in contact with the storage capacitor electrode 30 as in the first modification of the first embodiment. However, the reflection reduction layer 33 is disposed in contact with the storage capacitor electrode 30 from the viewpoint of reducing as much as possible the light reflected at an angle that causes color mixing among the light reflected by the reflection reduction layer 33. Is preferred.

  In the scope of the idea of the present invention, those skilled in the art can conceive various changes and modifications, and it is understood that these changes and modifications also belong to the scope of the present invention. For example, although the person skilled in the art appropriately added, deleted, or changed the design of the above-described embodiments, or added the process, omitted, or changed the conditions, the gist of the present invention As long as it is provided, it is included in the scope of the present invention.

11: Lower substrate 12: Pixel circuit 13: Interlayer insulating film 14: Contact hole 15: Capacitor insulating film 16: Bank layer 17: OLED light emitting layer 18: Cathode 19: Sealing film 20: Fillers 21, 22, 23: Color Filter 24: Black matrix 25: Upper substrate 30: Retention capacitance electrodes 31, 31r, 31g, 31b: Light absorber 32: Light scatterer 33: Reflection reduction layer 35: Retention capacitance wiring 36: Retention capacitance 40: Pixel electrode 41 41r, 41g, 41b: light emitting section 42: opening 61: scanning signal line 62: video signal line 63: drive power supply line 71: control TFT
72: Drive TFT
73: Storage capacitor 74: OLED element

Claims (13)

A plurality of pixels including a storage capacitor electrode facing the pixel electrode through an insulating film;
A display device comprising: a member disposed between the plurality of pixels and having a function of suppressing reflected light. A bank layer disposed between the plurality of pixels;
An OLED light emitting layer disposed on the pixel electrode and the bank layer;
A cathode disposed on the OLED light-emitting layer;
A sealing film disposed on the cathode;
The display device according to claim 1, further comprising: a filler disposed on the sealing film.   The display device according to claim 2, wherein the member having a function of suppressing reflected light is a light absorber.   The display device according to claim 3, wherein the light absorber is made of a photosensitive resin containing a black pigment.   The display device according to claim 3, wherein the light absorber is disposed on the storage capacitor electrode.   The display device according to claim 3, wherein the light absorber is disposed on the insulating film.   The display device according to claim 3, wherein the light absorber is disposed on the bank layer.   The display device according to claim 2, wherein the member having a function of suppressing the reflected light is a light scatterer.   The display device according to claim 8, wherein the light scatterer is disposed on the storage capacitor electrode.   The display device according to claim 9, wherein the light scatterer is a photosensitive resin containing fine particles having a refractive index different from that of the insulating film.   The display device according to claim 9, wherein the light scatterer is formed by forming irregularities on a surface of the storage capacitor electrode on the insulating film side.   The display device according to claim 2, wherein the member having a function of suppressing reflected light is a reflection reducing layer.   The display device according to claim 12, wherein the reflection reduction layer is made of a dielectric laminated film, and a refractive index of the dielectric laminated film is different from a refractive index of the insulating film.