Organic Light Emitting Diode Display

Abstract

The present invention discloses an organic light emitting diode display, comprising: a substrate; a color filter layer located on the substrate; an organic insulating layer located on the color filter layer; an anode and another anode located on the organic insulating layer, wherein the anode corresponds to the color filter layer, and the other anode corresponds to a white light emitting area; a pixel definition layer located on the organic insulating layer; an organic light emitting layer located on the pixel definition layer; and a cathode located on the pixel definition layer; wherein the pixel definition layer comprises a protrusion arranged between the anode and the other anode and another protrusion.

Description

[0001] This application is a divisional application of the Chinese invention patent application (application number: 201610644922.5, application date: August 9, 2016, invention name: Organic Light Emitting Diode Display). Technical Field

[0002] The present invention relates to an organic light emitting diode display, and in particular to an organic light emitting diode display with a pixel definition layer. Background Art

[0003] Generally speaking, an organic light emitting diode is a self-luminous display element that emits light by electrically exciting an organic compound. Recently, organic light emitting diodes have attracted attention and have been applied to the fields of flat-panel displays, television screens, computer monitors, and portable electronic device screens. When used in displays, organic light emitting diodes can provide several advantages over flat-panel displays, such as their self-luminous ability, wide viewing angle, and high brightness.

[0004] Thin Film Transistor-Organic Light Emitting Diode (TFT-OLED) displays have the advantages of low manufacturing cost, high response speed (about 100 times that of liquid crystal), power saving, wide operating temperature range, and light weight, so they have become the mainstream development in the current market. There are two main ways to make TFT-OLED displays, one is to use the technology of low temperature polysilicon (LTPS) thin film transistors, and the other is to use the technology of metal oxide thin film transistors.

[0005] However, current organic light emitting diode displays are not satisfactory in all aspects. Therefore, the industry still needs an organic light emitting diode display that can further improve light utilization efficiency and display quality. Summary of the invention

[0006] Some embodiments of the present invention provide an organic light emitting diode display, comprising: a substrate; a color filter layer located on the substrate; a planar layer located on the color filter layer; a first anode, a second anode and a third anode located on the planar layer; a pixel definition layer located on the planar layer; an organic light emitting layer located on the pixel definition layer; and a cathode located on the organic light emitting layer; wherein the first anode, the second anode and the third anode respectively include a first pixel region, a second pixel region and a third pixel region not covered by the pixel definition layer, and the pixel definition layer includes a first protrusion and a second protrusion located between the first pixel region and the second pixel region, and a third protrusion and a fourth protrusion located between the second pixel region and the third pixel region; wherein the cathode includes a first reflective portion located between the first protrusion and the second protrusion, and a second reflective portion located between the third protrusion and the fourth protrusion, wherein the distance between the first reflective portion and the substrate is greater than the distance between the second reflective portion and the substrate.

[0007] Some embodiments of the present invention provide an organic light-emitting diode display, comprising: a substrate; a color filter layer located on the substrate; an organic insulating layer located on the color filter layer; an anode and another anode located on the organic insulating layer, wherein the anode corresponds to the color filter layer and the other anode corresponds to a white light emitting area; a pixel definition layer located on the organic insulating layer; an organic light-emitting layer located on the pixel definition layer; and a cathode located on the pixel definition layer; wherein the pixel definition layer includes a protrusion and another protrusion arranged between the anode and the other anode.

[0008] In order to make the features and advantages of the embodiments of the present invention more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is a cross-sectional view of an organic light emitting diode display according to some embodiments of the present invention;

[0010] Figure 2 is a cross-sectional view of an organic light emitting diode display according to some embodiments of the present invention;

[0011] Figure 3 is a cross-sectional view of an organic light emitting diode display according to some embodiments of the present invention;

[0012] Figure 4 are cross-sectional views of organic light emitting diode displays according to some other embodiments of the present invention;

[0013] Figure 5 sectional views of organic light emitting diode displays according to some other embodiments of the present invention.

[0014] Explanation of symbols

[0015] 100: Organic light-emitting diode display

[0016] 102:Substrate

[0017] 102S1: Upper surface

[0018] 102S2: Lower surface

[0019] 104: first insulating layer

[0020] 106:Metal layer

[0021] 108: Second insulation layer

[0022] 110: Color filter layer

[0023] 110A: first color filter layer

[0024] 110B: second color filter layer

[0025] 110C: third color filter layer

[0026] 110D: Fourth color filter layer

[0027] 110E: Fifth color filter layer

[0028] 112: Flat layer

[0029] 112A: First flat portion

[0030] 112B: Second flat portion

[0031] 114: Groove

[0032] 114B: Groove bottom

[0033] 114S: Sloped sidewalls

[0034] 116A: First anode

[0035] 116B: Second anode

[0036] 116C: The third anode

[0037] 116D: Fourth anode

[0038] 116E: Fifth Anode

[0039] 116F: Sixth anode

[0040] 118: Pixel definition layer

[0041] 120A: first pixel area

[0042] 120B: second pixel area

[0043] 120C: third pixel area

[0044] 120D: Fourth pixel area

[0045] 120E: fifth pixel area

[0046] 120F: Sixth pixel area

[0047] 122: organic light emitting layer

[0048] 124: cathode

[0049] 124A: First reflection part

[0050] 124B: Second reflection part

[0051] 124C: first electrode portion

[0052] P1: First protrusion

[0053] P2: Second protrusion

[0054] P3: The third protrusion

[0055] P4: The fourth protrusion

[0056] P5: The fifth protrusion

[0057] P6: The sixth protrusion

[0058] P7: The seventh bulge

[0059] P8: The eighth bulge

[0060] P9: The ninth bulge

[0061] P10: The tenth bulge

[0062] D1: Distance

[0063] D2: Distance

[0064] D3: Distance

[0065] D4: Distance

[0066] D5: Distance

[0067] D6: Distance

[0068] D7: Distance

[0069] D8: Distance

[0070] D9: Distance

[0071] T1: Thickness

[0072] T2: Thickness

[0073] L1: Light

[0074] L2: Light

[0075] L3:Light

[0076] L4:Light

[0077] PK1: First Peak

[0078] PK2: Second Peak

[0079] SD: Saddle

[0080] RE1: First reflection end

[0081] RE2: Second reflection end

[0082] HP: Highest point

[0083] E1: First End

[0084] E2: Second end. DETAILED DESCRIPTION

[0085] The following is a detailed description of the organic light emitting diode display of some embodiments of the present invention. It should be understood that the following description provides many different embodiments or examples for implementing different modes of some embodiments of the present invention. The specific elements and arrangements described below are only for simple and clear description of some embodiments of the present invention. Of course, these are only for illustrative purposes and are not limitations of the present invention. In addition, repeated numbers or marks may be used in different embodiments. These repetitions are only for simple and clear description of some embodiments of the present invention and do not represent any correlation between the different embodiments and / or structures discussed. Furthermore, when it is mentioned that a first material layer is located on or above a second material layer, it includes a situation where the first material layer is in direct contact with the second material layer. Alternatively, there may be a situation where there are one or more other material layers in between, in which case the first material layer and the second material layer may not be in direct contact.

[0086] In addition, relative terms such as "lower" or "bottom" and "upper" or "top" may be used in the embodiments to describe the relative relationship of one element to another element in the drawings. It is understood that if the device in the drawings is turned upside down, the element described on the "lower" side will become the element on the "upper" side.

[0087] Here, the terms "about", "approximately", and "generally" generally mean within 20% of a given value or range, preferably within 10%, and more preferably within 5%, or within 3%, or within 2%, or within 1%, or within 0.5%. The quantities given here are approximate quantities, that is, in the absence of specific description of "about", "approximately", and "generally", the meanings of "about", "approximately", and "generally" can still be implied.

[0088] It is understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers, and / or parts, these elements, components, regions, layers, and / or parts should not be limited by these terms, and these terms are only used to distinguish different elements, components, regions, layers, and / or parts. Therefore, a first element, component, region, layer, and / or part discussed below may be referred to as a second element, component, region, layer, and / or part without departing from the teachings of some embodiments of the present invention.

[0089] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meanings as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It is understood that these terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning consistent with the background or context of the relevant technology and the present invention, and should not be interpreted in an idealized or overly formal manner unless specifically defined in the embodiments of the present invention.

[0090] Some embodiments of the present invention may be used in conjunction with the attached Figure 1 It is also understood that the drawings of the embodiments of the present invention are also considered as part of the disclosure. It should be understood that the drawings of the embodiments of the present invention are not drawn in proportion to the actual devices and components. The shapes and thicknesses of the embodiments may be exaggerated in the drawings to clearly show the features of the embodiments of the present invention. In addition, the structures and devices in the drawings are drawn in a schematic manner to clearly show the features of the embodiments of the present invention.

[0091] In some embodiments of the present invention, relative terms such as "lower", "upper", "horizontal", "vertical", "below", "above", "top", "bottom", etc. should be understood as the orientations shown in the paragraph and related drawings. Such relative terms are only for the convenience of explanation and do not mean that the device described therein must be manufactured or operated in a specific orientation. Terms such as "connection" and "interconnection" regarding bonding and connection, unless otherwise defined, may refer to two structures being in direct contact, or may also refer to two structures not being in direct contact, wherein there is another structure disposed between the two structures. Furthermore, such terms regarding bonding and connection may also include situations where both structures are movable, or both structures are fixed.

[0092] It is worth noting that the term "substrate" in the following text may include components formed on a transparent substrate and various film layers covering the substrate, on which any desired transistor components may have been formed, but in order to simplify the drawings, only a flat substrate is used to represent it. In addition, the "substrate surface" includes the topmost and exposed film layer on the transparent substrate, such as an insulating layer and / or metal lines.

[0093] Some embodiments of the present invention make the reflective portion of the cathode between the white light emitting area and the color filter layer closer to the substrate to improve the light utilization efficiency of the organic light emitting diode display. In addition, some embodiments of the present invention make the reflective portion of the cathode between the two color filter layers farther away from the substrate to avoid mixing of the color lights and improve the display quality.

[0094] See also Figure 1 , which is a cross-sectional view of an organic light emitting diode display 100 according to some embodiments of the present invention. Figure 1 As shown, according to some embodiments, the organic light emitting diode display 100 includes a substrate 102, and the substrate 102 may include a transparent substrate, such as a glass substrate, a ceramic substrate, a plastic substrate or any other suitable substrate. In some embodiments of the present invention, the substrate 102 may be a thin film transistor substrate. In addition, the substrate 102 has an upper surface 102S1 and a lower surface 102S2.

[0095] Continue to see Figure 1 As shown, according to some embodiments of the present invention, a first insulating layer 104 is disposed on the upper surface 102S1 of the substrate 102. The first insulating layer 104 may be silicon nitride, silicon dioxide, or silicon oxynitride. The first insulating layer 104 may be formed by chemical vapor deposition (CVD) or spin coating, and the chemical vapor deposition method may be, for example, low pressure chemical vapor deposition (LPCVD), low temperature chemical vapor deposition (LTCVD), rapid thermal chemical vapor deposition (RTCVD), plasma enhanced chemical vapor deposition (PECVD), atomic layer deposition (ALD) of atomic layer chemical vapor deposition, or other commonly used methods.

[0096] Continue to see Figure 1 As shown, according to some embodiments of the present invention, a metal layer 106 is disposed on the first insulating layer 104. The material of the metal layer 106 may include copper, aluminum, molybdenum, tungsten, gold, chromium, nickel, platinum, titanium, iridium, rhodium, alloys thereof, combinations thereof, or other metal materials with good electrical conductivity. The material of the metal layer 106 may be formed by the aforementioned chemical vapor deposition method (CVD), sputtering method, resistance heating evaporation method, electron beam evaporation method, or any other suitable deposition method.

[0097] In some embodiments of the present invention, the metal layer 106 may be a data line. However, in some other embodiments of the present invention, the metal layer 106 may be a gate line. In some other embodiments of the present invention, the metal layer 106 may be a power line.

[0098] Continue to see Figure 1 As shown, according to some embodiments of the present invention, a second insulating layer 108 is disposed on the metal layer 106. The second insulating layer 108 may be silicon nitride, silicon dioxide, or silicon oxynitride. The second insulating layer 108 may be formed by chemical vapor deposition (CVD) or spin coating. In addition, the second insulating layer 108 covers the metal layer 106.

[0099] Continue to see Figure 1 As shown, the organic light emitting diode display 100 includes a color filter layer 110 located on the first insulating layer 104 and the second insulating layer 108 (or located on the substrate 102). The color filter layer 110 includes a first color filter layer 110A, a second color filter layer 110B, a third color filter layer 110C, a fourth color filter layer 110D and a fifth color filter layer 110E from left to right.

[0100] In some embodiments of the present invention, the first color filter layer 110A is a red filter layer, the second color filter layer 110B is a green filter layer, the third color filter layer 110C is a blue filter layer, the fourth color filter layer 110D is a red filter layer, and the fifth color filter layer 110E is a green filter layer.

[0101] Furthermore, in some embodiments of the present invention, Figure 1 As shown, the first color filter layer 110A directly contacts the second color filter layer 110B, the second color filter layer 110B directly contacts the third color filter layer 110C, and the fourth color filter layer 110D directly contacts the fifth color filter layer 110E. However, the third color filter layer 110C does not directly contact the fourth color filter layer 110D. And the area between the third color filter layer 110C and the fourth color filter layer 110D corresponds to the subsequent white light emitting area.

[0102] Continue to see Figure 1 As shown, the organic light emitting diode display 100 further includes a planar layer 112 located on the color filter layer 110, the first insulating layer 104, and the second insulating layer 108. The material of the planar layer 112 may include an organic insulating material such as photoacryl. The planar layer 112 may be formed by chemical vapor deposition (CVD), spin coating, sputtering, evaporation, or any other suitable method.

[0103] like Figure 1As shown, according to some embodiments of the present invention, the planar layer 112 has a groove 114 between the third color filter layer 110C and the fourth color filter layer 110D. The groove 114 has a groove bottom 114B and two inclined sidewalls 114S disposed on both sides of the groove bottom 114B.

[0104] Continue to see Figure 1 As shown, the organic light emitting diode display 100 further includes a first anode 116A, a second anode 116B, a third anode 116C, a fourth anode 116D, a fifth anode 116E and a sixth anode 116F located on the planar layer 112. Figure 1 In the organic light emitting diode display 100 shown, from left to right are the sixth anode 116F, the first anode 116A, the second anode 116B, the third anode 116C, the fourth anode 116D and the fifth anode 116E.

[0105] In addition, in some embodiments of the present invention, the materials of the first anode 116A, the second anode 116B, the third anode 116C, the fourth anode 116D, the fifth anode 116E and the sixth anode 116F may include transparent conductive materials, such as indium tin oxide (ITO), tin oxide (SnO), indium zinc oxide (IZO), indium gallium zinc oxide (IGZO), indium tin zinc oxide (ITZO), antimony tin oxide (ATO), antimony zinc oxide (AZO), combinations thereof or any other suitable transparent conductive oxide materials.

[0106] In some embodiments of the present invention, the first anode 116A, the second anode 116B, the third anode 116C, the fourth anode 116D, the fifth anode 116E and the sixth anode 116F may be formed by chemical vapor deposition (CVD), sputtering, evaporation, or any other suitable method.

[0107] In addition, in some embodiments of the present invention, the sixth anode 116F corresponds to the first color filter layer 110A, the first anode 116A corresponds to the second color filter layer 110B, the second anode 116B corresponds to the third color filter layer 110C, the third anode 116C does not correspond to any color filter layer 110, the fourth anode 116D corresponds to the fourth color filter layer 110D, and the fifth anode 116E corresponds to the fifth color filter layer 110E.

[0108] In more detail, the first anode 116A is disposed between the sixth anode 116F and the second anode 116B, the second anode 116B is disposed between the first anode 116A and the third anode 116C, the third anode 116C is disposed between the second anode 116B and the fourth anode 116D, and the fourth anode 116D is disposed between the third anode 116C and the fifth anode 116E.

[0109] Furthermore, in some embodiments of the present invention, the first anode 116A, the second anode 116B, the third anode 116C, the fourth anode 116D, the fifth anode 116E, and the sixth anode 116F are electrically isolated from each other.

[0110] Continue to see Figure 1 As shown, according to some embodiments of the present invention, the third anode 116C is disposed between the third color filter layer 110C and the fourth color filter layer 110D, and is disposed on the groove bottom 114B and the inclined sidewall 114S of the groove 114 .

[0111] Continue to see Figure 1 As shown, according to some embodiments of the present invention, the organic light emitting diode display 100 further includes a pixel definition layer 118 located on the planar layer 112. Figure 1 As shown, according to some embodiments, the pixel definition layer 118 includes, from left to right, a ninth protrusion P9, a tenth protrusion P10, a first protrusion P1, a second protrusion P2, a third protrusion P3, a fourth protrusion P4, a fifth protrusion P5, a sixth protrusion P6, a seventh protrusion P7 and an eighth protrusion P8.

[0112] Furthermore, in some embodiments of the present invention, the material of the pixel definition layer 118 may include acryl based resin, polyimide based resin, benzocyclobutene based resin, a combination thereof, or any other suitable material.

[0113] In addition, in some embodiments of the present invention, a pixel definition material layer (not shown) may be first formed by chemical vapor deposition (CVD), spin coating, sputtering, evaporation, or any other suitable method, and then the ninth protrusion P9, the tenth protrusion P10, the first protrusion P1, the second protrusion P2, the third protrusion P3, the fourth protrusion P4, the fifth protrusion P5, the sixth protrusion P6, the seventh protrusion P7, and the eighth protrusion P8 may be formed by using a multi-grayscale photomask. In detail, the multi-grayscale photomask can be divided into two types: an interference type photomask (Gray Tone Mask) and a half-tone photomask (half tone mask). The interference type photomask is to produce a micro-slit below the resolution of the exposure machine, and then use this micro-slit to cover a part of the light source to achieve a half-exposure effect. The half-tone photomask uses a "semi-transparent" film to perform half-exposure.

[0114] In addition, if Figure 1As shown, according to some embodiments, the ninth protrusion P9 and the tenth protrusion P10 are disposed between the sixth anode 116F and the first anode 116A, and the ninth protrusion P9 covers a portion of the sixth anode 116F, while the tenth protrusion P10 covers a portion of the first anode 116A.

[0115] Furthermore, in some embodiments of the present invention, the first protrusion P1 and the second protrusion P2 are disposed between the first anode 116A and the second anode 116B, and the first protrusion P1 covers a portion of the first anode 116A, while the second protrusion P2 covers a portion of the second anode 116B.

[0116] Furthermore, in some embodiments of the present invention, the third protrusion P3 and the fourth protrusion P4 are disposed between the second anode 116B and the third anode 116C, and the third protrusion P3 covers a portion of the second anode 116B, while the fourth protrusion P4 covers a portion of the third anode 116C.

[0117] Furthermore, in some embodiments of the present invention, the fifth protrusion P5 and the sixth protrusion P6 are disposed between the third anode 116C and the fourth anode 116D, and the fifth protrusion P5 covers a portion of the third anode 116C, while the sixth protrusion P6 covers a portion of the fourth anode 116D.

[0118] Furthermore, in some embodiments of the present invention, the seventh protrusion P7 and the eighth protrusion P8 are disposed between the fourth anode 116D and the fifth anode 116E, and the seventh protrusion P7 covers a portion of the fourth anode 116D, while the eighth protrusion P8 covers a portion of the fifth anode 116E.

[0119] Continue to see Figure 1 As shown, according to some embodiments of the present invention, the first anode 116A includes a first pixel region 120A that is not covered by the pixel definition layer 118. In detail, the region of the first anode 116A that is not covered by the tenth protrusion P10 and the first protrusion P1 is the first pixel region 120A. In other words, the region of the first anode 116A that is exposed from the tenth protrusion P10 and the first protrusion P1 is the first pixel region 120A.

[0120] In addition, in some embodiments of the present invention, the second anode 116B includes a second pixel region 120B that is not covered by the pixel definition layer 118. Specifically, the region of the second anode 116B that is not covered by the second protrusion P2 and the third protrusion P3 is the second pixel region 120B. In other words, the region of the second anode 116B that is exposed from the second protrusion P2 and the third protrusion P3 is the second pixel region 120B.

[0121] In addition, in some embodiments of the present invention, the third anode 116C includes a third pixel region 120C that is not covered by the pixel definition layer 118. Specifically, the region of the third anode 116C that is not covered by the fourth protrusion P4 and the fifth protrusion P5 is the third pixel region 120C. In other words, the region of the third anode 116C that is exposed from the fourth protrusion P4 and the fifth protrusion P5 is the third pixel region 120C.

[0122] In addition, in some embodiments of the present invention, the groove 114 corresponds to the third pixel region 120C.

[0123] In addition, in some embodiments of the present invention, the fourth anode 116D includes a fourth pixel region 120D not covered by the pixel definition layer 118. Specifically, the region of the fourth anode 116D not covered by the sixth protrusion P6 and the seventh protrusion P7 is the fourth pixel region 120D. In other words, the region of the fourth anode 116D exposed from the sixth protrusion P6 and the seventh protrusion P7 is the fourth pixel region 120D.

[0124] In addition, in some embodiments of the present invention, the fifth anode 116E includes a fifth pixel region 120E not covered by the pixel definition layer 118. Specifically, the region of the fifth anode 116E not covered by the eighth protrusion P8 is the fifth pixel region 120E. In other words, the region of the fifth anode 116E exposed from the eighth protrusion P8 is the fifth pixel region 120E.

[0125] In addition, in some embodiments of the present invention, the sixth anode 116F includes a sixth pixel region 120F not covered by the pixel definition layer 118. Specifically, the region of the sixth anode 116F not covered by the ninth protrusion P9 is the sixth pixel region 120F. In other words, the region of the sixth anode 116F exposed from the ninth protrusion P9 is the sixth pixel region 120F.

[0126] Continue to see Figure 1 As shown, according to some embodiments of the present invention, the sixth pixel region 120F corresponds to the first color filter layer 110A. In other words, the sixth pixel region 120F is located above the first color filter layer 110A.

[0127] According to some embodiments of the present invention, the first pixel region 120A corresponds to the second color filter layer 110B. In other words, the first pixel region 120A is located above the second color filter layer 110B.

[0128] According to some embodiments of the present invention, the second pixel region 120B corresponds to the third color filter layer 110C. In other words, the second pixel region 120B is located above the third color filter layer 110C.

[0129] According to some embodiments of the present invention, the fourth pixel region 120D corresponds to the fourth color filter layer 110D. In other words, the fourth pixel region 120D is located above the fourth color filter layer 110D.

[0130] According to some embodiments of the present invention, the fifth pixel region 120E corresponds to the fifth color filter layer 110E. In other words, the fifth pixel region 120E is located above the fifth color filter layer 110E.

[0131] In addition, since the third pixel region 120C (or the third anode 116C) does not correspond to any color filter layer 110 , in some embodiments of the present invention, the third pixel region 120C is a white light emitting region.

[0132] Continue to see Figure 1 As shown, according to some embodiments of the present invention, the organic light emitting diode display 100 further includes an organic light emitting layer 122 located on the pixel definition layer 118, the first anode 116A, the second anode 116B, the third anode 116C, the fourth anode 116D, the fifth anode 116E, and the sixth anode 116F. In addition, in some embodiments of the present invention, the organic light emitting layer 122 is blanket disposed on the pixel definition layer 118, the first anode 116A, the second anode 116B, the third anode 116C, the fourth anode 116D, the fifth anode 116E, and the sixth anode 116F.

[0133] In some embodiments of the present invention, the organic light-emitting layer 122 is a single-layer structure, which can be one of an emitting layer (EML), a hole injection layer (HIL), a hole transport layer (HTL), an electron injection layer (EIL) and an electron transport layer (ETL). In other embodiments, the organic light-emitting layer 122 can be a multi-layer structure, which is composed of a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer. In still other embodiments, the organic light-emitting layer 122 can also be composed of a light-emitting layer, a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer.

[0134] In some embodiments of the present invention, the organic light emitting layer 122 may be formed by chemical vapor deposition (CVD), spin coating, sputtering, evaporation, or any other suitable method.

[0135] Continue to see Figure 1As shown, according to some embodiments of the present invention, the organic light emitting diode display 100 further includes a cathode 124 located on the organic light emitting layer 122. In some embodiments of the present invention, the cathode 124 is blanket-coated on the organic light emitting layer 122.

[0136] In some embodiments of the present invention, the cathode 124 may be made of a reflective metal material, such as calcium, sodium, magnesium, aluminum, silver, alloys thereof, combinations thereof, or other conductive and reflective metal materials. In some embodiments of the present invention, the cathode 124 may be formed by chemical vapor deposition (CVD), spin coating, sputtering, evaporation, or any other suitable method.

[0137] Continue to see Figure 1 As shown, according to some embodiments of the present invention, the cathode 124 includes a first reflective portion 124A located between the first protrusion P1 and the second protrusion P2, and a second reflective portion 124B located between the third protrusion P3 and the fourth protrusion P4. Figure 1 As shown, according to some embodiments, the distance D1 between the first reflective portion 124A and the lower surface 102S2 of the substrate 102 is greater than the distance D2 between the second reflective portion 124B and the lower surface 102S2 of the substrate 102. In this embodiment, the lower surface 102S2 of the substrate 102 is only used as a distance reference point. In other embodiments, the upper surface 102S1 of the substrate 102 can also be used as a distance reference point. In other words, the distance between the first reflective portion 124A and the upper surface 102S1 of the substrate 102 is also greater than the distance between the second reflective portion 124B and the upper surface 102S1 of the substrate 102. Preferably, if the direction is not stated, the distance described in the present invention is the shortest distance between the two objects.

[0138] In detail, in some embodiments of the present invention, the third protrusion P3 does not overlap the fourth protrusion P4. Therefore, the second reflective portion 124B located between the third protrusion P3 and the fourth protrusion P4 is located on the flat layer 112, rather than on the third protrusion P3 or the fourth protrusion P4, so the second reflective portion 124B is closer to the lower surface 102S2 of the substrate 102. In contrast, the first protrusion P1 and the second protrusion P2 overlap each other (or contact each other) and form a saddle shape. The saddle shape includes two relatively high peaks and a relatively low saddle located between the two peaks relative to the substrate 102. The first reflective portion 124A located between the first protrusion P1 and the second protrusion P2 is located on the saddle of the saddle shape formed by the first protrusion P1 and the second protrusion P2, so the first reflective portion 124A is farther from the lower surface 102S2 of the substrate 102.

[0139] See also Figure 2, which is a cross-sectional view of an organic light emitting diode display 100 according to some embodiments of the present invention. Figure 2 As shown, according to some embodiments, in the third pixel region 120C (a white light emitting region in some embodiments of the present invention), the organic light emitting layer 122 located on the inclined sidewall 114S of the groove 114 emits light L1. The second reflective portion 124B located between the third pixel region 120C (a white light emitting region in some embodiments of the present invention) and the third color filter layer 110C (or the second pixel region 120B) can reflect the light L1 to the adjacent third color filter layer 110C. Since the second reflective portion 124B is closer to the substrate 102 than the first reflective portion 124A located on the saddle formed by the first protrusion P1 and the second protrusion P2, the light emitting path of the light L1 can be shortened, thereby increasing the light utilization efficiency of the organic light emitting diode display 100.

[0140] In addition, since the second reflective portion 124B is disposed on the inclined side wall 114S, the reflection efficiency of the light L1 can be further improved, thereby increasing the light utilization efficiency of the organic light emitting diode display 100 .

[0141] In addition, in some embodiments of the present invention, the configuration of the fifth protrusion P5 and the sixth protrusion P6 is the same as or similar to the configuration of the third protrusion P3 and the fourth protrusion P4, that is, the fifth protrusion P5 does not overlap the sixth protrusion P6, so in the third pixel area 120C, the light L2 emitted by the organic light-emitting layer 122 located on the inclined side wall 114S closer to the fourth pixel area 120D can also be effectively reflected to the fourth pixel area 120D, thereby increasing the light utilization efficiency of the organic light-emitting diode display 100.

[0142] In addition, in some embodiments of the present invention, since the first protrusion P1 and the second protrusion P2 between the second color filter layer 110B (corresponding to the first pixel region 120A) and the third color filter layer 110C (corresponding to the second pixel region 120B) are in contact with each other and form a saddle shape, the color light L3 (non-white light, such as green light, after passing through the second color filter layer 110B) emitted from the first pixel region 120A toward the second pixel region 120B can be reflected by the first reflective portion 124A disposed on the saddle shape and be closer to the first pixel region 120A, and the color light L4 (non-white light, such as blue light, after passing through the third color filter layer 110C) emitted from the second pixel region 120B toward the first pixel region 120A can be reflected by the first reflective portion 124A disposed on the saddle shape and be closer to the second pixel region 120B, thereby preventing the color light L3 from mixing with the color light L4, thereby improving the display quality of the organic light emitting diode display 100.

[0143] In addition, if Figure 2As shown, according to some embodiments, the configurations of the ninth protrusion P9 and the tenth protrusion P10 are the same as or similar to the configurations of the first protrusion P1 and the second protrusion P2 , so the ninth protrusion P9 and the tenth protrusion P10 can also improve the display quality of the organic light emitting diode display 100 .

[0144] In addition, if Figure 2 As shown, according to some embodiments, the configurations of the seventh protrusion P and the eighth protrusion P8 are the same as or similar to the configurations of the first protrusion P1 and the second protrusion P2 , so the seventh protrusion P and the eighth protrusion P8 can also improve the display quality of the organic light emitting diode display 100 .

[0145] See back Figure 1 In some embodiments of the present invention, the cathode 124 further includes a first electrode portion 124C located above the first pixel region 120A. The distance D1 between the first reflective portion 124A and the lower surface 102S2 of the substrate 102 is greater than the distance D3 between the first electrode portion 124C and the lower surface 102S2 of the substrate 102.

[0146] Continue to see Figure 1 As shown, according to some embodiments of the present invention, the planar layer 112 includes a first planar portion 112A located below the second pixel region 120B and a second planar portion 112B located below the third pixel region 120C, and a thickness T1 of the first planar portion 112A is less than a thickness T2 of the second planar portion 112B. In addition, in some embodiments of the present invention, the second planar portion 112B of the planar layer 112 has the above-mentioned groove 114.

[0147] Furthermore, in some embodiments of the present invention, the third color filter layer 110C is located below the first planar portion 112A.

[0148] See also Figure 3 , which is a cross-sectional view of an organic light emitting diode display 100 according to some embodiments of the present invention. Figure 3 As shown, according to some embodiments of the present invention, the second reflective portion 124B includes a first reflective end RE1 adjacent to the second pixel region 120B and a second reflective end RE2 adjacent to the third pixel region 120C, and a distance D4 between the first reflective end RE1 and the lower surface 102S2 of the substrate 102 is greater than a distance D5 between the second reflective end RE2 and the lower surface 102S2 of the substrate 102.

[0149] In addition, if Figure 3As shown, according to some embodiments of the present invention, the third anode 116C includes a first peak portion PK1, a second peak portion PK2, and a saddle portion SD (saddle portion) located between the first peak portion PK1 and the second peak portion PK2. In addition, in some embodiments of the present invention, the shortest distance D6 between one of the first peak portion PK1 and the second peak portion PK2 and the lower surface 102S2 of the substrate 102 is greater than the shortest distance D7 between the saddle portion SD and the lower surface 102S2 of the substrate 102.

[0150] It should be noted that Figure 1 to Figure 3 The embodiments shown are for illustrative purposes only and the scope of the present invention is not limited thereto. Figure 1 to Figure 3 In addition to the embodiment shown, the fourth protrusion and the fifth protrusion of the embodiment of the present invention may also have other cross-sectional shapes, such as Figure 4-5 The present invention is not limited to the following embodiments. Figure 1 to Figure 3 The embodiments shown are limited.

[0151] It should be noted that in the following text, the same or similar elements or film layers as those in the previous text will be represented by the same or similar numbers, and their materials, manufacturing methods and functions are the same or similar to those described in the previous text, so this part will not be repeated in the following text.

[0152] See also Figure 4 , which is a cross-sectional view of an organic light emitting diode display 400 according to some other embodiments of the present invention. Figure 4 As shown, according to some embodiments of the present invention, the bottom of the fourth protrusion P4 has a first end E1 and a second end E2 opposite to each other, the first end E1 is closer to or adjacent to the second pixel region 120B, and the second end E2 is closer to or adjacent to the third pixel region 120C. In addition, the surface of the fourth protrusion P4 has a highest point HP, and the highest point HP is the point on the surface of the fourth protrusion P4 where the distance to the lower surface 102S2 of the substrate 102 is the largest.

[0153] like Figure 4 As shown, according to some embodiments of the present invention, the distance from the highest point HP of the fourth protrusion P4 to the first end E1 is a distance D8, and the distance from the highest point HP of the fourth protrusion P4 to the second end E2 is a distance D9, and this distance D8 is not equal to the distance D9. For example, in some embodiments of the present invention, Figure 4 As shown, distance D8 is greater than distance D9.

[0154] In addition, if Figure 4 As shown, according to some embodiments, the distance D8 and the distance D9 are measured in a direction parallel to the upper surface 102S1 or the lower surface 102S2 of the substrate 102. In more detail, the upper surface of the substrate 102 has a normal vector, and the direction is perpendicular to the normal vector.

[0155] In addition, in some embodiments of the present invention, the cross-sectional shape of the fifth protrusion P5 may be similar to or the same as the cross-sectional shape of the fourth protrusion P4, such as Figure 4 shown.

[0156] In some embodiments of the present invention, by making the fourth protrusion P4 and the fifth protrusion P5 have the above-mentioned specific cross-sectional shape, the light utilization efficiency of the organic light emitting diode display 400 can be further increased.

[0157] See also Figure 5 , which is a cross-sectional view of an organic light emitting diode display 500 according to some other embodiments of the present invention. Figure 5 As shown, according to some embodiments of the present invention, the bottom of the fourth protrusion P4 has a first end E1 and a second end E2 opposite to each other, the first end E1 is closer to or adjacent to the second pixel region 120B, and the second end E2 is closer to or adjacent to the third pixel region 120C. In addition, the surface of the fourth protrusion P4 has a highest point HP, and the highest point HP is the point on the surface of the fourth protrusion P4 where the distance to the lower surface 102S2 of the substrate 102 is the largest.

[0158] like Figure 5 As shown, according to some embodiments of the present invention, the distance from the highest point HP of the fourth protrusion P4 to the first end E1 is a distance D8, and the distance from the highest point HP of the fourth protrusion P4 to the second end E2 is a distance D9, and this distance D8 is not equal to the distance D9. For example, in some embodiments of the present invention, Figure 5 As shown, distance D8 is smaller than distance D9.

[0159] In addition, if Figure 5 As shown, according to some embodiments, the distance D8 and the distance D9 are parallel to the upper surface 102S1 and the lower surface 102S2 of the substrate 102 .

[0160] In addition, in some embodiments of the present invention, the cross-sectional shape of the fifth protrusion P5 may be similar to or the same as the cross-sectional shape of the fourth protrusion P4, such as Figure 5 shown.

[0161] In some embodiments of the present invention, by making the fourth protrusion P4 and the fifth protrusion P5 have the above-mentioned specific cross-sectional shape, the light utilization efficiency of the organic light emitting diode display 500 can be further increased.

[0162] In summary, some embodiments of the present invention make the reflective portion of the cathode between the white light emitting area and the color filter layer closer to the substrate to improve the light utilization efficiency of the organic light emitting diode display. In addition, some embodiments of the present invention make the reflective portion of the cathode between the two color filter layers farther away from the substrate to avoid mixing of the color lights and improve the display quality.

[0163] It is worth noting that the above-mentioned element size, element parameters, and element shape are not limiting conditions of the present invention. A person skilled in the art can adjust these setting values ​​according to different needs. In addition, the organic light emitting diode display and the manufacturing method thereof of the embodiment of the present invention are not limited to Figure 1 to Figure 5 Some embodiments of the present invention may only include Figure 1 to Figure 5 In other words, not all the features shown in the figures need to be implemented simultaneously in the organic light emitting diode display and the manufacturing method thereof of some embodiments of the present invention.

[0164] Although the present invention has been disclosed in conjunction with the embodiments of the present invention, it should be understood that any person with ordinary knowledge in the art may make changes, substitutions and modifications without departing from the spirit and scope of the present invention. In addition, the scope of protection of the present invention is not limited to the processes, machines, manufactures, material compositions, devices, methods and steps in the specific embodiments described in the specification. Any person with ordinary knowledge in the art may understand the current or future developed processes, machines, manufactures, material compositions, devices, methods and steps from the disclosure of some embodiments of the present invention, as long as they can implement substantially the same functions or obtain substantially the same results in the embodiments described herein, they can be used according to some embodiments of the present invention. Therefore, the scope of protection of the present invention includes the above-mentioned processes, machines, manufactures, material compositions, devices, methods and steps. In addition, each patent application constitutes a separate embodiment, and the scope of protection of the present invention also includes the combination of each claim and embodiment.

Claims

1. An organic light emitting diode display, characterized in that: include: substrate; A color filter layer is located on the substrate; An organic insulating layer, located on the color filter layer; an anode and another anode, located on the organic insulating layer, wherein the anode overlaps the color filter layer; A pixel definition layer is located on the organic insulating layer; An organic light emitting layer, located on the pixel definition layer; as well as a cathode, located on the pixel definition layer; The pixel definition layer includes a protrusion and another protrusion disposed between the anode and the other anode, wherein the protrusion overlaps a portion of the anode, the other protrusion overlaps a portion of the other anode, and the area of ​​the other anode not covered by the other protrusion is a white light emitting area. In the cross-sectional view, the other protrusion has a first end, a second end, and a highest point between the first end and the second end. Compared with the first end, the second end is closer to the white light emitting area. wherein in a direction parallel to the surface of the substrate, the distance from the highest point to the first end is a first distance, the distance from the highest point to the second end is a second distance, and the first distance is not equal to the second distance, The organic insulating layer comprises: an organic insulating portion located below the anode; and another organic insulating portion, located below the another anode, The organic insulating portion and the other organic insulating portion are continuously arranged, and in a cross-sectional view, the thickness of the organic insulating portion is smaller than the thickness of the other organic insulating portion. 2 . The organic light emitting diode display as claimed in claim 1 , wherein the color filter layer is blue. 3 . The organic light emitting diode display as claimed in claim 1 , wherein the color filter layer is red. 4 . The organic light emitting diode display as claimed in claim 1 , wherein the cathode comprises a reflective portion located between the protrusion and the another protrusion. 5 . The organic light emitting diode display as claimed in claim 1 , further comprising a metal layer disposed between the substrate and the color filter layer. The organic light emitting diode display as claimed in claim 1 , wherein the first distance is greater than the second distance. 7 . The organic light emitting diode display as claimed in claim 1 , wherein the first distance is smaller than the second distance.

8. The organic light emitting diode display as claimed in claim 1, wherein the pixel definition layer comprises another protrusion, the further protrusion overlaps another portion of the another anode, and an area of ​​the another anode not overlapped by the another protrusion and the further protrusion is defined as the white light emitting area.

9. The organic light emitting diode display as claimed in claim 8, wherein in the cross-sectional view, the further protrusion has a third end, a fourth end, and a highest point located between the third end and the fourth end, and the fourth end is closer to the white light emitting region than the third end, In the direction parallel to the surface of the substrate, the distance from the highest point to the third end is the third distance, the distance from the highest point to the fourth end is the fourth distance, and the third distance is not equal to the fourth distance. 10 . The organic light emitting diode display as claimed in claim 1 , wherein in the cross-sectional view, the second end of the other protrusion of the pixel definition layer does not correspond to any color filter layer.

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