Display panel and method for manufacturing the same

Abstract

The present application relates to a display panel and a method of manufacturing the same. The display panel includes: an upper display substrate; the upper display substrate includes a pixel region disposed in each of the pixel columns, and a light-blocking region; and a lower display substrate, the lower display substrate includes display elements respectively overlapping with the pixel regions. The upper display substrate includes: a base substrate; a color filter layer; and a light control layer, the light control layer includes a transmissive portion overlapping with a first pixel region disposed in a first pixel column and a first conversion portion overlapping with a second pixel region disposed in a second pixel column; and a barrier layer, the barrier layer includes a first barrier disposed between the first conversion portion and the transmissive portion and a first sub-barrier disposed between adjacent first conversion portions. A first shortest distance from the lower surface of the base substrate to the lower surface of each of the first barriers is equal to a second shortest distance from the lower surface of the base substrate to the lower surface of each of the first sub-barriers.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority and benefit of Korean Patent Application No. 10 - 2019 - 0030746, filed on March 18, 2019, which is incorporated herein by reference in its entirety for all purposes as if fully set forth herein. Technical Field

[0003] Exemplary embodiments of the present invention generally relate to a display panel, and more particularly, to a display panel capable of preventing color mixing between pixels and a method of manufacturing the display panel. Background Art

[0004] Various display devices applied to multimedia devices (such as televisions, mobile phones, tablet computers, navigation devices, and gaming devices) are being developed. Display devices include various display panels. For example, a transmissive display panel that selectively transmits source light generated by a light source or a light - emitting display panel that generates source light by itself is used as a display panel. The display panel includes pixels that emit light of different colors (such as red, green, and blue).

[0005] The above information disclosed in this background art section is only for understanding the background of the inventive concept, and thus it may contain information that does not constitute the prior art. Summary of the Invention

[0006] The applicant has found that in a display device having pixels with barriers of different heights, the colors emitted from the pixels can be mixed between pixel regions.

[0007] A display panel constructed according to an exemplary embodiment of the present invention and a method of manufacturing the same according to an exemplary embodiment of the present invention can prevent color mixing between pixel regions and improve the visibility of the display by controlling the heights of barriers and sub - barriers provided between pixel regions. For example, the lower surface of the barrier and the lower surface of the sub - barrier can be provided at substantially the same height. More specifically, in one exemplary embodiment, the shortest distance from the upper substrate to the lower surface of the barrier overlapping with the light - transmissive part and the light - conversion part of the display can be equal to the distance from the upper substrate to the lower surface of the sub - barrier overlapping with the conversion part. Therefore, color mixing between pixel regions can be more effectively prevented and the overall visibility of the display panel can be improved.

[0008] Additional features of the inventive concept will be set forth in the following description, and in part will be apparent from the description, or may be learned by practice of the inventive concept.

[0009] According to an aspect of the present invention, a display panel includes: an upper display substrate including a plurality of pixel regions disposed in each of a plurality of pixel columns and a light-blocking region disposed adjacent to the plurality of pixel regions; and a lower display substrate including a plurality of display elements respectively overlapping the plurality of pixel regions. The upper display substrate includes a base substrate; a color filter layer having opposite first and second surfaces, the first surface being disposed on the base substrate; a light control layer disposed on the color filter layer and including a transmissive portion respectively overlapping a first pixel region disposed in a first column of the plurality of pixel columns and a first conversion portion respectively overlapping a second pixel region disposed in a second column of the plurality of pixel columns; and a barrier layer overlapping the light-blocking region, disposed on the color filter layer, and including a first barrier disposed between the first conversion portion and the transmissive portion and a first sub-barrier disposed between adjacent first conversion portions. A first shortest distance from a lower surface of the base substrate to a lower surface of each of the first barriers facing the lower display substrate is equal to a second shortest distance from the lower surface of the base substrate to a lower surface of each of the first sub-barriers facing the lower display substrate.

[0010] Each of the first sub-barriers may include a barrier portion disposed on the color filter layer and a covering portion covering the barrier portion and connected to the first conversion portion, and a lower surface of the first sub-barrier may include a lower surface of the covering portion.

[0011] The covering portion may have an integral shape with the first conversion portion.

[0012] The first conversion portion may convert first color light emitted from the display element into second color light, the transmissive portion transmits the first color light, and the barrier portion and the transmissive portion may include substantially the same material.

[0013] The barrier portion may include scattering particles and may be transparent.

[0014] The first barrier may have a color having a wavelength range different from that of the first color light.

[0015] At least a portion of each of the first barriers may protrude from the light control layer, and a height of this portion of each of the first barriers may be substantially equal to a height of the covering portion.

[0016] The light control layer may further include a second conversion portion respectively overlapping a third pixel region disposed in a third column of the plurality of pixel columns, the barrier layer may further include a second sub-barrier disposed between the second conversion portions, and a shortest distance from the lower surface of the base substrate to a lower surface of each of the second sub-barriers facing the lower display substrate may be substantially equal to the second shortest distance.

[0017] The barrier layer may further include a third sub-barrier disposed between the transmissive portions, and the shortest distance from the lower surface of the base substrate to the lower surface of each of the third sub-barriers facing the lower display substrate may be shorter than the second shortest distance.

[0018] The third sub-barrier may have an integral shape with the transmissive portions.

[0019] At least a portion of each of the first barriers may protrude from the light control layer to face the lower display substrate, and at least a portion of each of the first sub-barriers may protrude from the light control layer to face the lower display substrate.

[0020] The height of this portion of each of the first barriers may be substantially equal to the height of this portion of each of the first sub-barriers.

[0021] The area of this portion of each of the first barriers may be larger than the area of this portion of each of the first sub-barriers.

[0022] According to another aspect of the present invention, a display panel includes: an upper display substrate including a plurality of pixel regions and a light-blocking region disposed adjacent to the plurality of pixel regions; and a lower display substrate including a plurality of light-emitting devices respectively overlapping with the plurality of pixel regions. The upper display substrate includes a base substrate; a color filter layer disposed on the base substrate; a light control layer disposed on the color filter layer and including a transmissive component and a first conversion component, the transmissive component including transmissive portions respectively overlapping with first pixel regions arranged in one pixel column and a first light-blocking portion overlapping with the light-blocking region and disposed between the transmissive portions, the first conversion component including first conversion portions respectively overlapping with second pixel regions arranged in another pixel column and a second light-blocking portion overlapping with the light-blocking region and disposed between the first conversion portions; and a barrier layer overlapping with the light-blocking region and including a first barrier disposed between the first conversion component and the transmissive component and on the color filter layer and a first sub-barrier disposed on the second light-blocking portion of the first conversion component. At least a portion of each of the first barriers protrudes from the light control layer to face the lower display substrate, and the height of the first barrier is substantially equal to the height of the first sub-barrier.

[0023] The first conversion portion may convert first color light emitted from the light-emitting device into second color light, the transmissive portion transmits the first color light, and the first sub-barrier may have a color with a wavelength range different from the wavelength range of the first color light.

[0024] The transmissive portion may have an integral shape with the first light-blocking portion, and the first conversion portion may have an integral shape with the second light-blocking portion.

[0025] The first barrier and the first sub-barrier may have substantially the same color.

[0026] According to another aspect of the present invention, a method of manufacturing a display panel includes the following steps: disposing a color filter layer on a substrate substrate in which a plurality of pixel regions and a light-blocking region adjacent to the plurality of pixel regions are formed; forming a sub-barrier and a transmissive portion substantially simultaneously on the color filter layer, the sub-barrier overlapping with a first light-blocking region of the light-blocking region, the first light-blocking region being disposed between a plurality of pixel regions arranged in one pixel column, the transmissive portion overlapping with a plurality of pixel regions arranged in another pixel column and transmitting first color light emitted from a lower display substrate; forming a first conversion portion that converts the first color light emitted from the lower display substrate into second color light and overlaps with a plurality of pixel regions arranged in one pixel column; determining a height from a lower surface of the first conversion portion that does not overlap with the sub-barrier to a lower surface of the first conversion portion that overlaps with the sub-barrier; and forming a barrier overlapping with a second light-blocking region of the light-blocking region on the color filter layer to a height based on the determined height, the second light-blocking region being disposed between the transmissive portion and the first conversion portion.

[0027] The transmissive portion and the sub-barrier may include scattering particles formed of substantially the same material.

[0028] A lower surface of each of the sub-barriers overlapping with the first light-blocking region and a lower surface of each of the barriers overlapping with the second light-blocking region may have substantially the same height from a lower surface of the substrate substrate.

[0029] It should be understood that the foregoing general description and the following detailed description are both exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are included to provide a further understanding of the present invention, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the present invention and, together with the description, serve to explain the inventive concept.

[0031] Figure 1A A perspective view of an exemplary embodiment of a display panel constructed in accordance with the principles of the present invention.

[0032] Figure 1B A cross-sectional view of an exemplary embodiment of a display panel constructed in accordance with the principles of the present invention.

[0033] Figure 2 A plan view of an exemplary embodiment of a display panel constructed in accordance with the principles of the present invention.

[0034] Figure 3 A plan view of an exemplary embodiment of a representative pixel region of a display panel constructed in accordance with the principles of the present invention.

[0035] Figure 4 A cross-sectional view of an exemplary embodiment of a pixel region of a display panel constructed according to the principles of the present invention.

[0036] Figure 5 For Figure 3 A cross-sectional view of an exemplary embodiment of the upper display substrate taken along line I-I' in

[0037] Figure 6A For Figure 3 A plan view of an exemplary embodiment of the stacked structure of the upper display substrate of

[0038] Figure 6B For Figure 3 A plan view of another exemplary embodiment of the stacked structure of the upper display substrate of

[0039] Figure 6C For showing Figure 3 A view of an exemplary embodiment showing the optical characteristics of the light control layer in the display panel of

[0040] Figure 7 For Figure 3 A cross-sectional view of an exemplary embodiment of the upper display substrate taken along line II-II' in

[0041] Figure 8 For Figure 3 A cross-sectional view of another exemplary embodiment of the upper display substrate taken along line II-II' in

[0042] Figure 9A A plan view of another exemplary embodiment of a representative pixel region of a display panel constructed according to the principles of the present invention.

[0043] Figure 9B For Figure 9A A cross-sectional view of an exemplary embodiment of the upper display substrate taken along line III-III' in

[0044] Figures 10A to 10E For sequentially showing some steps in an exemplary method for manufacturing the display panel shown in Figure 7 A cross-sectional view. Detailed description of the invention

[0045] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of various exemplary embodiments or implementations of the present invention. As used herein, "embodiment" and "implementation" are interchangeable words that are non-limiting examples of a device or method that employs one or more inventive concepts disclosed herein. However, it will be apparent that the various exemplary embodiments may be practiced without these specific details or with one or more equivalent arrangements. In other instances, well-known structures and devices are shown in block diagram form in order to avoid unnecessarily obscuring the various exemplary embodiments. Further, the various exemplary embodiments may be different but need not be exclusive. For example, without departing from the inventive concept of the present invention, the specific shapes, configurations, and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment.

[0046] Unless otherwise indicated, the exemplary embodiments shown are understood to provide exemplary features that detail some ways in which the inventive concept of the present invention may be implemented in practice. Thus, unless otherwise indicated, the features, components, modules, layers, films, panels, regions, and / or aspects, etc. (hereinafter individually or collectively referred to as "elements") of the various embodiments may be combined, separated, interchanged, and / or rearranged in other ways without departing from the inventive concept of the present invention.

[0047] Generally, the use of cross-hatching and / or shading is provided in the drawings to clarify the boundaries between adjacent elements. Thus, unless indicated otherwise, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, dimension, ratio, commonality between the elements shown, and / or any other characteristic, attribute, property, etc. of the elements. Further, for clarity and / or for descriptive purposes, the dimensions and relative dimensions of the elements in the drawings may be exaggerated. When the exemplary embodiments may be implemented differently, the specific process sequence may be carried out differently from the described sequence. For example, two consecutively described processes may be carried out substantially simultaneously or in a sequence opposite to the described sequence. Moreover, like reference numerals denote like elements.

[0048] When an element, such as a layer, is referred to as being "on", "connected to", or "coupled to" another element or layer, it can be directly on, directly connected to, or directly coupled to the other element or layer, or intervening elements or layers may be present. However, when an element or layer is referred to as being "directly" on, "directly connected to", or "directly coupled to" another element or layer, no intervening elements or layers are present. For this reason, the term "connected" can refer to physical connection, electrical connection, and / or fluid connection with or without intervening elements. In addition, the D1 axis, D2 axis, and D3 axis are not limited to the three axes of a rectangular coordinate system, such as the x-axis, y-axis, and z-axis, and can be interpreted in a broader sense. For example, the D1 axis, D2 axis, and D3 axis can be perpendicular to each other, or can represent different directions that are not perpendicular to each other. For the purposes of the present disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" can be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as, for example, XYZ, XYY, YZ, and ZZ. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0049] Although terms such as "first", "second", etc. may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Thus, without departing from the teachings of the present disclosure, the first element discussed below could be termed a second element.

[0050] Spatial relative terms, such as "beneath", "below", "lower", "under", "above", "upper", "on top of", "higher", "side" (e.g., as in "sidewall"), etc., may be used herein for descriptive purposes and thus to describe the relationship of one element to another (elements) as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped over, an element described as "beneath" or "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can include both an orientation above and below. In addition, the device can be oriented in other ways (e.g., rotated 90 degrees or at other orientations), and as such, the spatial relative descriptors used herein are to be interpreted accordingly.

[0051] The terms used herein are for the purpose of describing particular embodiments and are not intended to be limiting. As used herein, the singular forms, "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Also, the terms "comprises," "comprising," "includes," and / or "including" when used in this specification, specify the presence of stated features, integers, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should also be noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as terms of degree, and, as such, are used to account for the inherent deviations of measured, calculated, and / or provided values that would be recognized by one of ordinary skill in the art.

[0052] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0053] Figure 1A A perspective view of an exemplary embodiment of a display panel DP constructed in accordance with the principles of the present invention. Figure 1B A cross-sectional view of an exemplary embodiment of a display panel DP constructed in accordance with the principles of the present invention.

[0054] The display panel DP can be applied to large electronic articles, such as monitors or outdoor billboards, as well as small and medium-sized electronic articles, such as personal computers, laptop computers, personal digital assistants, automotive navigation units, gaming units, smart phones, tablet computers, or cameras. These are merely exemplary, and the display panel DP can also be applied to other electronic articles.

[0055] According to an exemplary embodiment, the display panel DP can be one of a liquid crystal display panel, an electrophoretic display panel, a microelectromechanical systems display panel, an electro-wetting display panel, and an organic light-emitting display panel, but the specific type of the panel is not particularly limited.

[0056] The display panel DP can further include a chassis member or a molding member, and, depending on the type of the display panel DP, can further include a backlight unit.

[0057] Reference Figure 1A, the display panel DP may include a lower display substrate 100 and an upper display substrate 200 that is spaced apart from and opposite to the lower display substrate 100. As Figure 1A shown, the display panel DP may display an image through a display surface DP-IS. The display surface DP-IS may be substantially parallel to a plane defined by a first direction DR1 and a second direction DR2.

[0058] The display surface DP-IS may include a display area DA and a non-display area NDA. Pixels PX are arranged in the display area DA and are not arranged in the non-display area NDA. The non-display area NDA is defined along the edge of the display surface DP-IS. The display area DA may be surrounded by the non-display area NDA.

[0059] A third direction DR3 indicates a normal direction of the display surface DP-IS, that is, a thickness direction of the display panel DP. In the following description, the expression "when observed in a plan view" or "in a plan view" means a case of observing in the third direction DR3. Hereinafter, a front (or upper) surface and a rear (or lower) surface of each layer or each unit are distinguished from each other by being spaced apart in the third direction DR3, as best shown in Figure 1B . However, the directions indicated by the first direction DR1, the second direction DR2, and the third direction DR3 are relative to each other, and thus the directions indicated by the first direction DR1, the second direction DR2, and the third direction DR3 may be changed to other directions, for example, opposite directions.

[0060] The display panel DP includes a flat display surface DP-IS. However, the display panel DP is not limited thereto or thereby. For example, the display panel DP may include a curved display surface or a three-dimensional display surface. The three-dimensional display surface may include a plurality of display areas extending in different directions from each other.

[0061] Reference Figure 1B , a predetermined cell gap GP may be defined between the upper display substrate 200 and the lower display substrate 100. The cell gap GP may be maintained by a sealant member SLM for coupling the upper display substrate 200 and the lower display substrate 100. The sealant member SLM may include an organic adhesive member or an inorganic adhesive member. The sealant member SLM may include frit.

[0062] Figure 2 is a plan view of an exemplary embodiment of a display panel DP constructed according to the principles of the present invention. Figure 3 is a plan view of an exemplary embodiment of a pixel area of a display panel DP according to the principles of the present invention. Figure 4 is a cross-sectional view of an exemplary embodiment of a pixel area of a display panel DP constructed according to the principles of the present invention.

[0063] InFigure 2 shows the spatial arrangement and relative relationship of signal lines GL1 to GLn and DL1 to DLm and pixels PX11 to PXnm in a plane. The signal lines GL1 to GLn and DL1 to DLm may include a plurality of gate lines GL1 to GLn and a plurality of data lines DL1 to DLm.

[0064] Each of the pixels PX11 to PXnm is connected to a corresponding one of the gate lines GL1 to GLn and a corresponding one of the data lines DL1 to DLm. Each of the pixels PX11 to PXnm may include a pixel driving circuit and a display element. Depending on the configuration of the pixel driving circuit, more types of signal lines may be provided on the display panel DP.

[0065] The pixels PX11 to PXnm may be arranged in a matrix form, however, they are not limited to this or restricted thereby. The pixels PX11 to PXnm may be arranged in a pentile form. As another alternative, the pixels PX11 to PXnm may be arranged in a diamond form.

[0066] The gate driving circuit GDC may be provided in the non-display area NDA. By an oxide silicon gate driver circuit (OSG) process or an amorphous silicon gate driver circuit (ASG) process, the gate driving circuit GDC may be integrated in the display panel DP.

[0067] Figure 3 To show Figure 1A an enlarged view of a part of the display area DA shown in. The display area DA may include a plurality of pixel columns spaced apart from each other in a first direction DR1. Hereinafter, for ease of explanation, the display area DA is described as including a first pixel column PXA-GC1, a second pixel column PXA-GC2, and a third pixel column PXA-GC3.

[0068] Specifically, each of the first pixel column PXA-GC1, the second pixel column PXA-GC2, and the third pixel column PXA-GC3 may include pixel regions arranged in a second direction DR2. As shown in Figure 3 the first pixel column PXA-GC1 includes a plurality of first pixel regions arranged in the second direction DR2. As an example, the first pixel region may emit first color light to the outside. The second pixel column PXA-GC2 includes a plurality of second pixel regions arranged in the second direction DR2. As an example, the second pixel region may emit second color light different from the first color light to the outside. The third pixel column PXA-GC3 includes a plurality of third pixel regions arranged in the second direction DR2. As an example, the third pixel region may emit third color light different from the second color light to the outside.

[0069] Hereinafter, for the sake of explanation, the first pixel column PXA-GC1 is described as including two first pixel regions PXA-B1 and PXA-B2, the second pixel column PXA-GC2 is described as including two second pixel regions PXA-G1 and PXA-G2, and the third pixel column PXA-GC3 is described as including two third pixel regions PXA-R1 and PXA-R2. Hereinafter, the first to third pixel regions included in the first to third pixel columns PXA-GC1, PXA-GC2, and PXA-GC3 may be referred to as main pixel regions.

[0070] The first pixel regions PXA-B1 and PXA-B2 emit first color light having a first color wavelength band through the upper display substrate 200. The second pixel regions PXA-G1 and PXA-G2 emit second color light having a second color wavelength band different from the first color wavelength band through the upper display substrate 200. The third pixel regions PXA-R1 and PXA-R2 emit third color light having a third color wavelength band different from the first and second color wavelength bands through the upper display substrate 200.

[0071] The first pixel regions PXA-B1 and PXA-B2 may provide blue light, the second pixel regions PXA-G1 and PXA-G2 may provide green light, and the third pixel regions PXA-R1 and PXA-R2 may provide red light. In the illustrated exemplary embodiment, the source light may be blue light corresponding to the first color light. The source light may be generated by a light source (such as a backlight unit) or a display element (such as a light-emitting element).

[0072] The display area DA further includes a light-blocking region NPXA defined adjacent to the main pixel region. In the present application, a pixel region means a region from which the source light exits to the outside through the upper display substrate 200, and the light-blocking region NPXA means a region that blocks the source light from being output to the outside through the upper display substrate 200. The light-blocking region NPXA prevents color mixing between pixel regions. The main pixel region and the light-blocking region NPXA of the display area DA may be defined in the upper display substrate 200 described in Figure 1B the above.

[0073] The light-blocking region NPXA includes a first light-blocking region NA1 and a second light-blocking region NA2. The first light-blocking region NA1 extends in the second direction DR2 and is disposed between the first pixel column PXA-GC1, the second pixel column PXA-GC2, and the third pixel column PXA-GC3. The second light-blocking region NA2 is disposed between the pixel regions included in each of the first pixel column PXA-GC1, the second pixel column PXA-GC2, and the third pixel column PXA-GC3. For example, the second light-blocking region NA2 is disposed between the two first pixel regions PXA-B1 and PXA-B2.

[0074] Figure 3The main pixel regions having substantially the same regions are shown in a plan view as a representative example. However, the main pixel regions are not limited to this or restricted thereby. For example, when observed in a plan view, the first pixel region, the second pixel region, and the third pixel region respectively included in the first pixel column PXA-GC1, the second pixel column PXA-GC2, and the third pixel column PXA-GC3 may have different regions from each other and / or may have rounded corner regions. Additionally, the first pixel region, the second pixel region, and the third pixel region may have different polygonal shapes or regular polygonal shapes with rounded corners at their corner regions.

[0075] Figure 4 A cross-sectional view of a display panel DP corresponding to one of the second pixel regions PXA-G1 and PXA-G2 is shown. Figure 4 A cross-sectional view corresponding to a driving transistor T-D and a light-emitting device OLED is shown. The upper display substrate 200 is simply shown in Figure 4 it.

[0076] Reference Figure 4 , the lower display substrate 100 includes a first base substrate BS1, a circuit device layer DP-CL provided on the first substrate BS1, and a display element layer DP-OLED provided on the circuit device layer DP-CL.

[0077] The first base substrate BS1 may include a synthetic resin substrate or a glass substrate. The circuit device layer DP-CL includes at least one insulating layer and circuit elements. The circuit elements include signal lines and a driving circuit for pixels. The circuit device layer DP-CL may be formed by coating and deposition processes for forming insulating layers, semiconductor layers, and conductive layers, and a photolithography process for patterning the insulating layers, semiconductor layers, and conductive layers.

[0078] According to the illustrated exemplary embodiment, the circuit device layer DP-CL includes a buffer layer BFL, a first insulating layer 10, a second insulating layer 20, and a third insulating layer 30. Each of the first insulating layer 10 and the second insulating layer 20 may be an inorganic layer, and the third insulating layer 30 may be an organic layer.

[0079] As a representative example, Figure 4 The spatial arrangement between a semiconductor pattern OSP, a control electrode GE, an input electrode DE, and an output electrode SE for forming a driving transistor T-D is shown. By way of example, a first contact hole CH1, a second contact hole CH2, and a third contact hole CH3 are also shown.

[0080] The display element layer DP-OLED includes a light-emitting device OLED. The light-emitting device OLED generates the above-mentioned source light. The light-emitting device OLED includes a first electrode, a second electrode, and a light-emitting layer inserted between the first electrode and the second electrode. In the illustrated exemplary embodiment, the light-emitting device OLED includes an organic light-emitting diode. The display element layer DP-OLED includes a pixel defining layer PDL. The pixel defining layer PDL may be an organic layer.

[0081] The first electrode AE is disposed on the third insulating layer 30. The first electrode AE is connected to the output electrode SE through a third contact hole CH3 (the third contact hole CH3 is defined through the third insulating layer 30). The light-emitting opening OP is defined by the pixel defining layer PDL. At least a part of the first electrode AE is exposed through the light-emitting opening OP of the pixel defining layer PDL. The source light emitted from the light-emitting device OLED exits through the light-emitting opening OP and is provided to the outside through the pixel region.

[0082] The hole control layer HCL, the light-emitting layer EML, and the electron control layer ECL may generally be disposed on the first electrode AE and the pixel defining layer PDL. The hole control layer HCL, the light-emitting layer EML, and the electron control layer ECL may generally be disposed in the above-mentioned main pixel region.

[0083] The hole control layer HCL may include a hole transport layer and may further include a hole injection layer. The light-emitting layer EML may generate blue light. The blue light may have a wavelength of about 410 nm to about 480 nm. The light emission spectrum of the blue light may have a maximum peak in the range of about 440 nm to about 460 nm. The electron control layer ECL may include an electron transport layer and may further include an electron injection layer. The light-emitting layer EML may have a tandem structure or a single-layer structure.

[0084] The second electrode CE may be disposed on the electron control layer ECL. The second electrode CE may generally be disposed in the main pixel region. The second electrode CE may have an area larger than that of the first electrode AE. A cover layer CL may be further disposed on the second electrode CE to protect the second electrode CE. The cover layer CL may include an organic material or an inorganic material. According to an embodiment, the cover layer CL may be omitted.

[0085] The lower display substrate 100 may include a plurality of display elements corresponding to Figure 3 the main pixel regions shown in. The display elements may have the same stacked structure as each other and may have the stacked structure shown in Figure 4 .

[0086] Figure 5 For Figure 3 is a cross-sectional view of an exemplary embodiment of the upper display substrate 200 taken along line I-I' in. Figure 6AA plan view of an exemplary embodiment of a stacked structure of an upper display substrate 200 on which a first color filter CF-B is formed. Figure 6B A plan view of another exemplary embodiment of a stacked structure of an upper display substrate 200 on which all three color filters CF-B, CF-G, and CF-R are formed. Figure 6C To illustrate Figure 3 A view of an exemplary embodiment showing the optical characteristics of a light control layer in a display panel.

[0087] Reference Figure 5 , the upper display substrate 200 includes a second base substrate BS2, a color filter layer CFL, a light control layer LCL, and a barrier layer DML.

[0088] The color filter layer CFL includes a first color filter CF-B, a second color filter CF-G, and a third color filter CF-R disposed on the second base substrate BS2. According to an exemplary embodiment, the first color filter CF-B, the second color filter CF-G, and the third color filter CF-R are directly disposed on the second base substrate BS2.

[0089] The first color filter CF-B may have a refractive index similar to that of the second base substrate BS2 rather than similar to the refractive indices of the second color filter CF-G and the third color filter CF-R. As a result, external light from the outside may enter the first color filter CF-B after passing through the second base substrate BS2. Therefore, reflection of external light occurring at the interface between the second base substrate BS2 and the color filter layer CFL can be reduced.

[0090] Specifically, the first color filter CF-B may be divided into a filter portion BP1 serving as a color filter and a light-blocking portion BP2 serving as a light-blocking pattern. The filter portion BP1 may overlap with the first pixel region PXA-B1, and the light-blocking portion BP2 may overlap with the light-blocking region NPXA. According to Figure 5 , the light-blocking portion BP2 may overlap with the first light-blocking region NA1 of the light-blocking region NPXA.

[0091] Reference Figure 6A , the first color filter CF-B (defining a first opening B-OP1 and a second opening B-OP2 through the first color filter CF-B) may be formed by forming an organic layer having a blue color on one surface of the second base substrate BS2 and by exposing and developing the organic layer. That is, the filter portion BP1 and the light-blocking portion BP2 of the first color filter CF-B can be integrally formed.

[0092] Reference Figure 6B, the second color filter CF-G is disposed in a second opening B-OP2 defined by the first color filter CF-B. When observed in a plan view, the second color filter CF-G substantially covers the entire second opening B-OP2, and at least a part of the second color filter CF-G is disposed on the light-blocking portion BP2. The third color filter CF-R is disposed in a first opening B-OP1 defined by the first color filter CF-B. When observed in a plan view, the third color filter CF-R substantially covers the entire first opening B-OP1, and at least a part of the third color filter CF-R is disposed on the light-blocking portion BP2.

[0093] The second color filter CF-G and the third color filter CF-R disposed on the light-blocking portion BP2 may be in contact with each other, however, they are not limited thereto or thereby. That is, the third color filter CF-R disposed on the light-blocking portion BP2 may be spaced apart from the second color filter CF-G.

[0094] Referring again to Figure 5 , a light-shielding member SHD may be disposed on the light-blocking portion BP2 of the first color filter CF-B. A part of the second color filter CF-G and a part of the third color filter CF-R may be disposed on the light-shielding member SHD.

[0095] The light-shielding member SHD may absorb external light applied through the light-blocking portion BP2 and may prevent color mixing between the first pixel region PXA-B1, the second pixel region PXA-G1, and the third pixel region PXA-R1. In addition, the light-shielding member SHD may absorb a part of the light emitted from the light control layer LCL.

[0096] As an example, the light-shielding member SHD may be provided as a black light-shielding layer. As another example, the light-shielding member SHD may be provided as a yellow light-shielding layer.

[0097] The light control layer LCL may be disposed on the color filter layer CFL, and may include a light-emitting substance that converts first color light emitted from the display element layer DP-OLED (refer to Figure 4 ) into different color light.

[0098] The light control layer LCL may include a transmissive portion CCF-B, a first conversion portion CCF-G, and a second conversion portion CCF-R. The transmissive portion CCF-B may overlap with the first pixel region PXA-B1 and may transmit the first color light. A plurality of transmissive portions CCF-B may be provided, and the transmissive portions CCF-B may respectively overlap with Figure 3 the first pixel regions PXA-B1 and PXA-B2 shown in

[0099] The first conversion part CCF-G can overlap with the second pixel region PXA-G1, and can absorb the first color light to emit a second color light different from the first color light. A plurality of first conversion parts CCF-G can be provided, and the first conversion parts CCF-G can respectively overlap with Figure 3 the second pixel regions PXA-G1 and PXA-G2 shown in

[0100] The second conversion part CCF-R can overlap with the third pixel region PXA-R1, and can emit a third color light different from the second color light. A plurality of second conversion parts CCF-R can be provided, and the second conversion parts CCF-R can respectively overlap with Figure 3 the third pixel regions PXA-R1 and PXA-R2 shown in

[0101] Referring to Figure 6C , the first conversion part CCF-G can include a first light-emitting substance EP-G, and the first light-emitting substance EP-G can convert the first color light B-light into the second color light G-light as green light. The second conversion part CCF-R can include a second light-emitting substance EP-R, and the second light-emitting substance EP-R can convert the first color light B-light into the third color light R-light as red light. The transmission part CCF-B may not include a light-emitting substance. The transmission part CCF-B can transmit the first color light B-light.

[0102] The transmission part CCF-B, the first conversion part CCF-G, and the second conversion part CCF-R can include a base resin BR. The base resin BR can be a polymer resin. For example, the base resin BR can be an acrylic resin, a urethane resin, a silicone resin, or an epoxy resin. The base resin BR can be a transparent resin.

[0103] In addition, each of the transmission part CCF-B, the first conversion part CCF-G, and the second conversion part CCF-R can further include scattering particles OL. The scattering particles OL can be TiO2 or silica-based nanoparticles. The scattering particles OL can scatter the light emitted from the light-emitting substance to release the scattered light to the outside of the conversion part. In addition, in the case of the transmission part CCF-B that transmits light without modifying the light, the scattering particles OL can release the light applied to them after scattering the light.

[0104] The first light-emitting substance EP-G and the second light-emitting substance EP-R (hereinafter referred to as "light-emitting substances") included in the light control layer LCL can be fluorescent substances or quantum dots. That is, the light control layer LCL can include at least one of a fluorescent substance and a quantum dot as the light-emitting substances EP-G and EP-R.

[0105] As an example, the fluorescent substances used as the light-emitting substances EP-G and EP-R can be inorganic fluorescent substances. In the display panel DP according to the exemplary embodiment, the fluorescent substances used as the light-emitting substances EP-G and EP-R can be green fluorescent substances or red fluorescent substances.

[0106] The type of the fluorescent substance used in the light control layer LCL is not limited to the above materials, and known fluorescent substances other than the above-mentioned fluorescent substances can be used.

[0107] As another example, the light-emitting substances EP-G and EP-R included in the light control layer LCL can be quantum dots. The quantum dots can be selected from II-VI group compounds, III-V group compounds, IV-VI group compounds, group IV elements, group IV compounds, and combinations thereof.

[0108] The quantum dots can have a core-shell structure including a core and a shell surrounding the core. Additionally, the quantum dots can have a core-shell structure in which one quantum dot surrounds another quantum dot. The interface between the core and the shell can have a concentration gradient in which the concentration of the elements present in the shell becomes lower towards the center of the interface.

[0109] The quantum dots can be particles having a size on the nanometer scale. The quantum dots can have a full width at half maximum (FWHM) of the light emission wavelength spectrum of about 45 nm or less, preferably about 40 nm or less, and more preferably about 30 nm or less, and the color purity or color reproducibility can be improved within the above-mentioned range. Additionally, since the light emitted from the quantum dots travels in all directions, the light viewing angle can be improved.

[0110] Additionally, the quantum dots can have a form commonly used in the art and are not particularly limited. For example, nanoparticles, nanotubes, nanowires, nanofibers, or nanoplate-like particles in the form of spheres, cones, multi-arms, or cubes can be used as the form of the quantum dots.

[0111] The color of the light emitted from the quantum dots can change depending on the size of the quantum dots. In the case where the first light-emitting substance EP-G and the second light-emitting substance EP-R are quantum dots, the particle sizes of the first light-emitting substance EP-G and the second light-emitting substance EP-R can be different from each other. For example, the particle size of the first light-emitting substance EP-G can be smaller than the particle size of the second light-emitting substance EP-R. In this case, the first light-emitting substance EP-G can emit light having a wavelength longer than that of the second light-emitting substance EP-R.

[0112] Refer again to Figure 5, the barrier layer DML may overlap with the light-blocking region NPXA and may be disposed on the light-blocking portion BP2 of the color filter layer CFL. The barrier layer DML may have a shape extending in the second direction DR2 and may include a first barrier DMa. The first barrier DMa is disposed between the transmissive portion CCF-B and the first conversion portion CCF-G and overlaps with a part of the transmissive portion CCF-B and a part of the first conversion portion CCF-G, and is also disposed between the first conversion portion CCF-G and the second conversion portion CCF-R and overlaps with a part of the first conversion portion CCF-G and a part of the second conversion portion CCF-R. Additionally, as Figure 7 shown, the barrier layer DML may include a second sub-barrier DM-R disposed between a plurality of second conversion portions CCF-R and overlapping with a part of the plurality of second conversion portions CCF-R, and a third sub-barrier DM-B disposed between a plurality of transmissive portions CCF-B and overlapping with a part of the plurality of transmissive portions CCF-B. Furthermore, the barrier layer DML may also include a first sub-barrier (not shown) disposed between a plurality of first conversion portions CCF-G and overlapping with a part of the plurality of first conversion portions CCF-G. The first sub-barrier has substantially the same structure as the second sub-barrier DM-R.

[0113] The first barrier DMa may overlap with the first light-blocking region NA1 of the light-blocking region NPXA (refer to Figure 3 ), and the first to third sub-barriers may overlap with the second light-blocking region NA2 of the light-blocking region NPXA (refer to Figure 3 ).

[0114] The first barrier DMa and the first to third sub-barriers may be formed by different processes from each other and may include different materials. These will be described in detail later.

[0115] The first barrier DMa may have a color with a wavelength range different from the wavelength range of the first color of blue light and may be disposed on the light-blocking portion BP2 of the color filter layer CFL. As an example, the first barrier DMa may have a black color. The first barrier DMa may prevent color mixing from occurring between the first pixel region PXA-B1, the second pixel region PXA-G1, and the third pixel region PXA-R1 that are spaced apart from each other in the first direction DR1.

[0116] Refer to Figure 5, at least a part of each of the first barriers DMa can be exposed without being covered by the light control layer LCL. That is, this part of each of the first barriers DMa can have a shape protruding from the lower surface of the light control layer LCL. In the illustrated exemplary embodiment, the lower surface of the light control layer LCL is the surface facing the lower display substrate 100. For example, the lower surface of the light control layer LCL is the lower surface of each of the transmissive part CCF-B, the first conversion part CCF-G, and the second conversion part CCF-R.

[0117] Figure 7 is a cross-sectional view of an exemplary embodiment of the upper display substrate taken along the line II-II’ in Figure 3 .

[0118] Figure 7 The second sub-barrier DM-R and the third sub-barrier DM-B among the first, second, and third sub-barriers overlapping with the second light-blocking region NA2 mentioned above are shown. The first sub-barrier can have substantially the same structure as the second sub-barrier DM-R.

[0119] Referring to Figure 3 and Figure 7 , the second sub-barrier DM-R can include a barrier part DM-M disposed on the third color filter CF-R and a covering part DM-C covering the barrier part DM-M and connected to the second conversion part CCF-R. As described above, the sub-barrier can be disposed on the color filter layer CFL instead of on the light control layer LCL. As an example, the sub-barrier can be directly disposed on the color filter layer CFL.

[0120] Therefore, each of the plurality of second sub-barriers DM-R disposed between the second conversion parts CCF-R can include a barrier part DM-M and a covering part DM-C. In addition, the plurality of first sub-barriers disposed between the first conversion parts CCF-G can have substantially the same structure as the second sub-barrier DM-R including the barrier part DM-M and the covering part DM-C.

[0121] The barrier part DM-M can be disposed between the second conversion parts CCF-R to prevent color mixing between adjacent second conversion parts CCF-R. The covering part DM-C can completely cover the barrier part DM-M and can be connected to the lower surface of the second conversion part CCF-R. The covering part DM-C can have a shape protruding from the lower surface of the second conversion part CCF-R and can include the same material as the second conversion part CCF-R. As an example, the covering part DM-C and the second conversion part CCF-R can be integrally formed in the same process.

[0122] Referring to Figure 5The portion of the described first barrier DMa protruding from the light control layer LCL may have a height substantially the same as that of the covering portion DM-C.

[0123] The second sub-barrier DM-R includes a barrier portion DM-M and a covering portion DM-C. However, the second sub-barrier DM-R may include only the barrier portion DM-M. In this case, the covering portion DM-C may be provided as part of the second conversion portion CCF-R, and the second sub-barrier DM-R may be completely covered by the second conversion portion CCF-R.

[0124] Hereinafter, the distance from the lower surface of the second base substrate BS2 to the lower surface of the first barrier DMa facing the lower display substrate 100 is referred to as the "first shortest distance". The distance from the lower surface of the second base substrate BS2 to the lower surface of the second sub-barrier DM-R facing the lower display substrate 100 is referred to as the "second shortest distance". In Figure 7 the exemplary embodiment shown, the lower surface of the second sub-barrier DM-R means the lower surface of the covering portion DM-C.

[0125] In a conventional display panel, since the first shortest distance is different from the second shortest distance, the lower surfaces of the first barrier DMa and the second sub-barrier DM-R are not in the same horizontal plane, and there is a local height difference between them. Therefore, color mixing occurs between pixel regions.

[0126] However, according to the principle of the present invention, the first shortest distance and the second shortest distance may have substantially the same length H1. Since the first shortest distance and the second shortest distance have substantially the same length H1, color mixing between pixel regions can be effectively prevented. The shortest distance from the lower surface of the second base substrate BS2 to the lower surface of the first sub-barrier facing the lower display substrate 100 may be equal to the length H1 corresponding to the second shortest distance.

[0127] In addition, even if the first shortest distance from the lower surface of the second base substrate BS2 to the lower surface of the first barrier DMa and the second shortest distance from the lower surface of the second base substrate BS2 to the lower surface of the second sub-barrier DM-R are designed to be equal to each other, the first shortest distance and the second shortest distance may be slightly different due to errors in the manufacturing process. For example, due to the manufacturing process, the first shortest distance may be slightly longer than the second shortest distance, and vice versa. Therefore, even if there is a slight difference between the first shortest distance and the second shortest distance due to manufacturing tolerances, etc., the first shortest distance and the second shortest distance are regarded as being substantially the same as each other.

[0128] The third sub-barrier DM-B may have a structure different from that of the second sub-barrier DM-R. That is, the third sub-barrier DM-B may be provided integrally with the transmissive portion CCF-B. The transmissive portion CCF-B that overlaps with the first pixel regions PXA-B1 and PXA-B2 included in the first pixel column PXA-GC1 respectively (refer to Figure 3 ) and the third sub-barrier DM-B disposed between the transmissive portions CCF-B may be substantially provided as one component extending in the second direction DR2.

[0129] In particular, since the third sub-barrier DM-B and the transmissive portion CCF-B are provided as one component, the shortest distance from the lower surface of the second base substrate BS2 to the lower surface of the third sub-barrier DM-B facing the lower display substrate 100 may be shorter than the second shortest distance.

[0130] In addition, the barrier portion DM-M of the second sub-barrier DM-R may include the same material as the transmissive portion CCF-B. The barrier portion DM-M of the second sub-barrier DM-R may have a transparent color and may be formed by the same process as the transmissive portion CCF-B.

[0131] Furthermore, the barrier portion DM-M of the second sub-barrier DM-R may include Figure 6C the scattering particles OL shown in. The scattering particles OL included in the barrier portion DM-M may scatter the light incident from the outside to change the traveling direction of the light. As a result, the barrier portion DM-M may have the function of preventing color mixing by using the scattering particles OL.

[0132] Figure 8 For Figure 3 a cross-sectional view of another exemplary embodiment of the upper display substrate taken along line II-II' in.

[0133] Figure 8 The upper display substrate 200a shown in may have substantially the same structure as the upper display substrate 200 shown in Figure 7 , except that the structure of the second sub-barrier is changed. Therefore, for the sake of simplicity of explanation, the description of the same structures as those in Figure 7 will be omitted to avoid redundancy.

[0134] Refer to Figure 8 , at least a part of the second sub-barrier DM-Ra may protrude outward from the second conversion portion CCF-R of the light control layer LCL to face the lower display substrate 100. That is, when compared with the second sub-barrier DM-R shown in Figure 7 , the second sub-barrier DM-Ra shown in Figure 8 may only include the barrier portion and may not include the covering portion.

[0135] Specifically, the height H2 of a part of the first barrier DMa protruding from the light control layer LCL may be substantially the same as the height H2 of a part of the second sub-barrier DM-Ra protruding from the second conversion part CCF-R. That is, each of the height H2 of this part of the first barrier DMa and the height H2 of this part of the second sub-barrier DM-Ra may be the height from the lower surface of the light control layer LCL. Additionally, the lower surface of the light control layer LCL may have a substantially uniform height from the second base substrate BS2.

[0136] Furthermore, when observed in a plan view, the area W1 of this part of the first barrier DMa may be larger than the area W2 of this part of the second sub-barrier DM-Ra. That is, when observed in a plan view, the area of the exposed part of the first barrier DMa that is not covered by the lower surface of the light control layer LCL may be larger than the area of the exposed part of the second sub-barrier DM-Ra that is not covered by the lower surface of the light control layer LCL.

[0137] Figure 9A It is a plan view of another exemplary embodiment of a representative pixel region of a display panel constructed according to the principles of the present invention. Figure 9B It is along Figure 9A A cross-sectional view of an exemplary embodiment of the upper display substrate taken along line III-III' in

[0138] Figure 9B The upper display substrate 200b shown in Figure 7 may have substantially the same structure as the upper display substrate 200 shown in Figure 7 except that the structures of the light control layer LCL and the barrier layer DML are changed. Therefore, for ease of explanation, the description of the same structures as those in

[0139] will be omitted to avoid redundancy. Figure 9A and Figure 9B Referring to

[0140] The light control layer LCLa may include a transmissive part CCF-Ba, a first conversion part CCF-Ga, and a second conversion part CCF-Ra.

[0141] The first conversion part CCF-Ga can overlap with the second pixel regions PXA-G1, PXA-G2 and the second light-blocking region NA2 disposed between the second pixel regions PXA-G1, PXA-G2. That is, the first conversion part CCF-Ga can be provided as a component extending in the second direction DR2. The first conversion part CCF-Ga can include a transmissive part overlapping with the second pixel regions PXA-G1, PXA-G2 and a light-blocking part overlapping with the second light-blocking region NA2. The light-blocking part of the first conversion part CCF-Ga can overlap with the light-blocking part BP2 of the first color filter CF-B.

[0142] The second conversion part CCF-Ra can overlap with the third pixel regions PXA-R1, PXA-R2 and the second light-blocking region NA2 disposed between the third pixel regions PXA-R1, PXA-R2. That is, the second conversion part CCF-Ra can be provided as a component extending in the second direction DR2. The second conversion part CCF-Ra can include a transmissive part RT-P overlapping with the third pixel regions PXA-R1, PXA-R2 and a light-blocking part RB-P overlapping with the second light-blocking region NA2. The light-blocking part RB-P of the second conversion part CCF-Ra can overlap with the light-blocking part BP2 of the first color filter CF-B.

[0143] The barrier layer DML can include a first barrier DMa and first to third sub-barriers. The first barrier DMa can have a shape extending in the second direction DR2, and can overlap between the transmissive part CCF-Ba and the first conversion part CCF-Ga and can overlap between the first conversion part CCF-Ga and the second conversion part CCF-Ra. The structure of the first barrier DMa can be substantially the same as Figure 5 the structure of the first barrier DMa shown in

[0144] The second sub-barrier DM-Ra can be disposed on the light-blocking part RB-P of the second conversion part CCF-Ra. That is, when compared with the second sub-barrier DM-R shown in Figure 7 the second sub-barrier DM-Ra shown in Figure 9B can be disposed on the light control layer LCLa instead of on the color filter layer CFL.

[0145] In addition, the height H3 of a part of the first barrier DMa protruding from the light control layer LCLa can be substantially the same as the height H3 of a part of the second sub-barrier DM-Ra disposed on the light-blocking part RB-P of the second conversion part CCF-Ra. Each of the height H3 of this part of the first barrier DMa and the height H3 of this part of the second sub-barrier DM-Ra is a height defined from the lower surface of the light control layer LCLa.

[0146] The second sub-barrier DM-Ra may include the same material as the first barrier DMa. That is, the second sub-barrier DM-Ra and the first barrier DMa may have the same color as each other, however, they are not limited to this or restricted thereby. The second sub-barrier DM-Ra may include the same material as the transmissive portion CCF-Ba, and may have a color having a wavelength range different from that of the first color.

[0147] Figures 10A to 10E To sequentially show some steps in an exemplary method for manufacturing Figure 7 the display panel shown in

[0148] Referring to Figure 10A , a color filter layer CFL may be disposed on the second substrate BS2. The color filter layer CFL may have a structure substantially the same as that of the color filter layer CFL described with reference to Figure 5 .

[0149] Referring to Figure 10B , a second sub-barrier DM-R and a transmissive portion CCF-B may be formed on the color filter layer CFL. The first sub-barrier disposed between the first conversion portions CCF-G may be formed substantially simultaneously with the second sub-barrier DM-R. As described above, the second sub-barrier DM-R and the transmissive portion CCF-B may be disposed on the color filter layer CFL with the same material. The second sub-barrier DM-R and the transmissive portion CCF-B may be formed by forming a transparent resin layer including scattering particles OL (refer to Figure 6C ) on the color filter layer CFL and by performing an exposure and development process on the transparent resin layer.

[0150] In this case, the length from the lower surface of the second substrate BS2 to the lower surface of the second sub-barrier DM-R may be greater than the length from the lower surface of the second substrate BS2 to the lower surface of the transmissive portion CCF-B by a predetermined length D1. As an example, the predetermined length D1 may correspond to the thickness of the third color filter CF-R disposed on the light-blocking portion BP2 of the first color filter CF-B.

[0151] Referring to Figure 10C , a first conversion portion CCF-G and a second conversion portion CCF-R of the light control layer LCL may be formed on the color filter layer CFL. Specifically, the first conversion portion CCF-G and the second conversion portion CCF-R may be sequentially formed on the color filter layer CFL by different processes from each other. For example, the first conversion portion CCF-G may be formed by forming a resin layer including a first light-emitting substance EP-G (refer to Figure 6C ) on the color filter layer CFL and by performing an exposure and development process on the resin layer. Then, the second conversion portion CCF-R may be formed by forming a resin layer including a second light-emitting substance EP-R (refer toFigure 6C ) and is formed by performing an exposure and development process on the resin layer. However, the process sequences of the first conversion section CCF-G and the second conversion section CCF-R may be changed relative to each other.

[0152] According to Figure 10C , the second conversion section CCF-R formed on the color filter layer CFL may substantially cover the entire second sub-barrier DM-R.

[0153] Referring to Figure 10D , the portion where the second conversion section CCF-R overlaps with the second sub-barrier DM-R may correspond to the covering portion DM-C of the second sub-barrier DM-R described in Figure 7 . The covering portion DM-C of the second sub-barrier DM-R may protrude a predetermined height Hz from the lower surface of the second conversion section CCF-R that does not overlap with the second sub-barrier DM-R.

[0154] The predetermined height Hz may be determined before forming the first barrier DMa.

[0155] Referring to Figure 10E , considering the predetermined height Hz of the covering portion DM-C, the first barrier DMa may be formed on the color filter layer CFL that overlaps with the first light-blocking region NA1. As a result, the height by which the first barrier DMa protrudes from the lower surface of the light control layer LCL may correspond to the predetermined height Hz.

[0156] Although certain exemplary embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Accordingly, the inventive concept is not limited to such embodiments, but rather to the broader scope of the appended claims and various obvious modifications and equivalent arrangements that will be apparent to those of ordinary skill in the art.

Claims

1. A display panel, the display panel comprising: an upper display substrate, the upper display substrate including a plurality of pixel regions disposed in each of a plurality of pixel columns and a light-blocking region disposed adjacent to the plurality of pixel regions; and a lower display substrate, the lower display substrate including a plurality of display elements respectively overlapping with the plurality of pixel regions, the upper display substrate including: a base substrate; a color filter layer disposed on the base substrate; a light control layer, the light control layer disposed on the color filter layer and including a transmissive portion respectively overlapping with a first pixel region disposed in a first column of the plurality of pixel columns and a first conversion portion respectively overlapping with a second pixel region disposed in a second column of the plurality of pixel columns; and a barrier layer, the barrier layer overlapping with the light-blocking region, disposed on the color filter layer, and including a first barrier disposed between the first conversion portion and the transmissive portion and a first sub-barrier disposed between adjacent first conversion portions, wherein a first shortest distance from a lower surface of the base substrate to a lower surface of each of the first barriers facing the lower display substrate is equal to a second shortest distance from the lower surface of the base substrate to a lower surface of each of the first sub-barriers facing the lower display substrate, wherein each of the first sub-barriers includes a barrier portion disposed on the color filter layer and a covering portion covering the barrier portion and connected to the first conversion portion, and the lower surface of the first sub-barrier includes the lower surface of the covering portion, wherein the covering portion and the first conversion portion have an integral shape.

2. The display panel according to claim 1, wherein the first conversion portion converts first color light emitted from the display element into second color light, the transmissive portion transmits the first color light, and the barrier portion and the transmissive portion include the same material.

3. The display panel according to claim 2, wherein the barrier portion includes scattering particles and is transparent.

4. The display panel according to claim 2, wherein the first barrier has a color with a wavelength range different from that of the first color light.

5. The display panel according to claim 1, wherein at least a portion of each of the first barriers protrudes from the light control layer, and a height of the portion of each of the first barriers is equal to a height of the covering portion.

6. The display panel according to claim 1, wherein the light control layer further includes a second conversion portion respectively overlapping with a third pixel region disposed in a third column of the plurality of pixel columns, the barrier layer further includes a second sub-barrier disposed between the second conversion portions, and a shortest distance from the lower surface of the base substrate to a lower surface of each of the second sub-barriers facing the lower display substrate is equal to the second shortest distance.

7. The display panel according to claim 6, wherein the barrier layer further includes a third sub-barrier disposed between the transmission portions, and a shortest distance from the lower surface of the base substrate to the lower surface of each of the third sub-barriers facing the lower display substrate is shorter than the second shortest distance.

8. The display panel according to claim 7, wherein the third sub-barrier and the transmission portion have an integral shape.

9. The display panel according to claim 1, wherein at least a part of each of the first barriers protrudes from the light control layer to face the lower display substrate, and at least a part of each of the first sub-barriers protrudes from the light control layer to face the lower display substrate.

10. The display panel according to claim 9, wherein a height of the part of each of the first barriers is equal to a height of the part of each of the first sub-barriers.

11. The display panel according to claim 9, wherein an area of the part of each of the first barriers is larger than an area of the part of each of the first sub-barriers.

12. A display panel, the display panel comprising: an upper display substrate including a plurality of pixel regions and a light-blocking region disposed adjacent to the plurality of pixel regions; and a lower display substrate including a plurality of light-emitting devices respectively overlapping with the plurality of pixel regions, the upper display substrate including: a base substrate; a color filter layer disposed on the base substrate; a light control layer disposed on the color filter layer and including a transmission member and a first conversion member, the transmission member including a transmission portion respectively overlapping with a first pixel region arranged in one pixel column and a first light-blocking portion overlapping with the light-blocking region and disposed between the transmission portions, the first conversion member including a first conversion portion respectively overlapping with a second pixel region arranged in another pixel column and a second light-blocking portion overlapping with the light-blocking region and disposed between the first conversion portions; and a barrier layer overlapping with the light-blocking region and including a first barrier disposed between the first conversion member and the transmission member and disposed on the color filter layer and a first sub-barrier disposed on the second light-blocking portion of the first conversion member, wherein at least a part of each of the first barriers protrudes from the light control layer to face the lower display substrate, and a height of the first barrier is equal to a height of the first sub-barrier.

13. The display panel according to claim 12, wherein the first conversion portion converts first color light emitted from the light-emitting device into second color light, the transmission portion transmits the first color light, and the first sub-barrier has a color with a wavelength range different from that of the first color light.

14. The display panel according to claim 12, wherein the transmission portion and the first light-blocking portion have an integral shape, and the first conversion portion and the second light-blocking portion have an integral shape.

15. The display panel according to claim 12, wherein the first barrier and the first sub-barrier have the same color.

16. A method of manufacturing a display panel, the method comprising the following steps: Providing a color filter layer on a base substrate in which a plurality of pixel regions and a light-blocking region adjacent to the plurality of pixel regions are formed; Simultaneously forming a sub-barrier and a transmissive portion on the color filter layer, the sub-barrier overlapping a first light-blocking region of the light-blocking region, the first light-blocking region being disposed between the plurality of pixel regions arranged in one pixel column, the transmissive portion overlapping the plurality of pixel regions arranged in another pixel column and transmitting first color light emitted from a lower display substrate; Forming a first conversion portion that converts the first color light emitted from the lower display substrate into second color light and overlaps the plurality of pixel regions arranged in the one pixel column; Determining a height from a lower surface of the first conversion portion that does not overlap with the sub-barrier to a lower surface of the first conversion portion that overlaps with the sub-barrier; And Forming a barrier overlapping a second light-blocking region of the light-blocking region on the color filter layer to a height based on the determined height, the second light-blocking region being disposed between the transmissive portion and the first conversion portion.

17. The method according to claim 16, wherein the transmissive portion and the sub-barrier include scattering particles formed of the same material.

18. The method according to claim 16, wherein a lower surface of each of the sub-barriers overlapping the first light-blocking region and a lower surface of each of the barriers overlapping the second light-blocking region have the same height from a lower surface of the base substrate.

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