阅读说明：本技术 显示面板 (Display panel ) 是由 安在宪 尹汝建 金正起 洪锡埈 于 2019-12-20 设计创作，主要内容包括：提供了一种显示面板,所述显示面板包括：上显示基底,包括显示区域以及与显示区域相邻的非显示区域,显示区域包括第一像素区域至第三像素区域以及与第一像素区域至第三像素区域相邻的遮光区域；下显示基底,包括被构造为发射第一颜色的光并且分别与第一像素区域至第三像素区域叠置的第一发光元件至第三发光元件；以及多个间隔件,与显示区域叠置,并且布置在上显示基底与下显示基底之间。(There is provided a display panel including: an upper display substrate including a display region and a non-display region adjacent to the display region, the display region including first to third pixel regions and a light-shielding region adjacent to the first to third pixel regions; a lower display substrate including first to third light emitting elements configured to emit light of a first color and to overlap the first to third pixel regions, respectively; and a plurality of spacers overlapping the display area and disposed between the upper display substrate and the lower display substrate.)

1. A display panel, the display panel comprising:

an upper display substrate including a display region and a non-display region adjacent to the display region, wherein the display region includes first to third pixel regions and a light blocking region adjacent to the first to third pixel regions;

a lower display substrate including first to third light emitting elements configured to emit light of a first color and to overlap the first to third pixel regions, respectively; and

a plurality of spacers overlapping the display area and disposed between the upper display substrate and the lower display substrate,

wherein the upper display substrate includes:

a base substrate; and

a light control layer on the base substrate and configured to convert the first color light to output a different color light,

wherein the upper display substrate and the lower display substrate are spaced apart from each other, and the plurality of spacers are between the upper display substrate and the lower display substrate.

2. The display panel of claim 1, wherein the light control layer comprises:

a first conversion section including a first light emitter configured to convert the first color light and emit a second color light different from the first color light and overlap the first pixel region;

a second conversion section including a second light emitter configured to convert the first color light and emit a third color light different from the first color light and the second color light and overlapping the second pixel region; and

a transmission part configured to transmit the first color light and overlap the third pixel region.

3. The display panel of claim 2, wherein the spacer comprises:

a first spacer located between the first conversion part and the first light emitting element;

a second spacer positioned between the second conversion part and the second light emitting element; and

and a third spacer positioned between the transmissive portion and the third light emitting element.

4. The display panel according to claim 2, wherein the spacer overlaps the light-shielding region and is arranged in at least one of a space between the first conversion portion and the second conversion portion, a space between the second conversion portion and the transmission portion, and a space between the transmission portion and the first conversion portion.

5. The display panel according to claim 1, wherein the lower display substrate includes a lower base substrate and a display element layer that is on the lower base substrate and includes the first to third light emitting elements and a pixel defining layer,

wherein each of the first to third light emitting elements includes a first electrode, a second electrode, and a light emitting layer between the first electrode and the second electrode, and the pixel defining layer includes an opening portion exposing at least a portion of the first electrode, and

wherein the spacer does not overlap the opening portion.

6. The display panel of claim 1, further comprising a filler configured to fill a separation space between the upper display substrate and the lower display substrate in which the spacer is disposed.

7. The display panel according to claim 1, wherein the lower display substrate further comprises a cover layer covering the first to third light emitting elements,

wherein the spacer is located between the light control layer and the cover layer.

8. The display panel of claim 1, wherein the spacer overlaps the light blocking area.

9. The display panel according to claim 8, wherein the first to third pixel regions are sequentially alternately arranged in a first direction,

wherein each of the first to third pixel regions is arranged as a pixel region emitting light of the same color in a second direction crossing the first direction,

wherein the spacer is located between two adjacent pixel regions among the pixel regions arranged in the second direction.

10. A display panel, the display panel comprising:

an upper display substrate including a display region and a non-display region adjacent to the display region, wherein the display region includes first to third pixel regions and a light blocking region adjacent to the first to third pixel regions;

a lower display substrate including first to third light emitting elements configured to emit light of a first color and to overlap the first to third pixel regions, respectively; and

a plurality of spacers overlapping the display area and disposed between the upper display substrate and the lower display substrate to provide a separation space between the upper display substrate and the lower display substrate,

wherein the upper display substrate includes:

a base substrate;

a light control layer on the base substrate and configured to convert the first color light into a different color light and emit the converted first color light; and

a light-shielding member overlapping the light-shielding region and disposed between the base substrate and the light control layer,

wherein the spacer has a structure extending from the light shielding member in the separation space.

Technical Field

Aspects of embodiments of the present disclosure relate to a display panel.

Background

The display panel includes a transmissive display panel for selectively transmitting source light generated from a light source and a light emitting display panel for generating the source light therein. The display panel may comprise different types of optical control layers to produce a color image, depending on the pixel. The light control layer may transmit only a part of the wavelength range of the source light or convert the color of the source light. Some light control layers may change the properties of the light without changing the color of the source light.

Disclosure of Invention

According to an aspect of embodiments of the present disclosure, there is provided a display panel comprising a light control layer. According to another aspect of embodiments of the present disclosure, there is provided a display panel in which visibility may be improved.

According to one or more embodiments, a display panel includes: an upper display substrate including a display region and a non-display region adjacent to the display region, wherein the display region includes first to third pixel regions and a light-shielding region adjacent to the first to third pixel regions; a lower display substrate including first to third light emitting elements configured to emit light of a first color and to overlap the first to third pixel regions, respectively; and a plurality of spacers overlapping the display area and disposed between the upper display substrate and the lower display substrate, wherein the upper display substrate includes: a base substrate; and a light control layer on the base substrate and configured to convert the first color light to output different color light, wherein the upper and lower display substrates are spaced apart from each other, and the plurality of spacers are between the upper and lower display substrates.

In an embodiment, the optical control layer may comprise: a first conversion part including a first light emitter configured to convert a first color light and emit a second color light different from the first color light and overlapping the first pixel region; a second conversion section including a second light emitter configured to convert the first color light and emit a third color light different from the first color light and the second color light and overlapping the second pixel region; and a transmission part configured to transmit the first color light and overlap the third pixel region.

In an embodiment, the spacer may include: a first spacer positioned between the first conversion part and the first light emitting element; a second spacer positioned between the second conversion part and the second light emitting element; and a third spacer positioned between the transmissive portion and the third light emitting element.

In an embodiment, the spacer may overlap the light blocking region, and may be disposed in at least one of a space between the first conversion portion and the second conversion portion, a space between the second conversion portion and the transmission portion, and a space between the transmission portion and the first conversion portion.

In an embodiment, the lower display substrate may include a lower base substrate and a display element layer on the lower base substrate and including first to third light emitting elements and a pixel defining layer, wherein each of the first to third light emitting elements may include a first electrode, a second electrode, and a light emitting layer between the first and second electrodes, and the pixel defining layer includes an opening portion exposing at least a portion of the first electrode, wherein the spacer may not overlap the opening portion.

In the embodiment, the light emitting layers of the first to third light emitting elements may be provided in an integrated shape.

In an embodiment, the display panel may further include an adhesive member overlapping the non-display region, disposed between the upper display substrate and the lower display substrate, and defining an inner space together with the upper display substrate and the lower display substrate.

In an embodiment, the display panel may further include a filler configured to fill a separation space between the upper display substrate and the lower display substrate in which the spacer is disposed.

In an embodiment, the display panel may further include an air layer in the separation space between the upper display substrate and the lower display substrate in which the spacer is disposed.

In an embodiment, the lower display substrate may further include a cover layer covering the first to third light emitting elements, wherein the spacer may be positioned between the light control layer and the cover layer.

In an embodiment, the spacer may overlap the light blocking region.

In an embodiment, the first to third pixel regions may be sequentially alternately arranged in a first direction, wherein each of the first to third pixel regions may be arranged as a pixel region emitting light of the same color in a second direction crossing the first direction, wherein the spacer may be located between two adjacent pixel regions among the pixel regions arranged in the second direction.

In an embodiment, the upper display substrate may further include a color filter layer, wherein the color filter layer may include: a first color filter positioned between the base substrate and the optical control layer and overlapping the first pixel region; a second color filter positioned between the base substrate and the optical control layer and overlapping the second pixel region; and a third color filter between the base substrate and the optical control layer and overlapping the third pixel region.

In an embodiment, the first color filter may be configured to transmit light of a second color different from the first color, the second color filter may be configured to transmit light of a third color different from the first color and the second color, and the third color filter may be configured to transmit light of the first color.

In an embodiment, the upper display substrate may further include a low refractive layer between the color filter layer and the optical control layer.

In an embodiment, the first color may be blue.

According to one or more embodiments, a display panel includes: an upper display substrate including a display region and a non-display region adjacent to the display region, wherein the display region includes first to third pixel regions and a light-shielding region adjacent to the first to third pixel regions; a lower display substrate including first to third light emitting elements configured to emit light of a first color and to overlap the first to third pixel regions, respectively; and a plurality of spacers overlapping the display area and disposed between the upper display substrate and the lower display substrate to provide a separation space between the upper display substrate and the lower display substrate, wherein the upper display substrate includes: a base substrate; a light control layer on the base substrate and configured to convert the first color light into a different color light and emit the converted first color light; and a light shielding member overlapping the light shielding region and disposed between the base substrate and the light control layer, wherein the spacer has a structure extending from the light shielding member in the separation space.

In an embodiment, the upper display substrate may further include first to third color filters between the base substrate and the optical control layer, and overlapping the first to third pixel regions, respectively, and separated by the light blocking member or the spacer.

In an embodiment, in a thickness direction of the upper display substrate, a thickness of each of the spacers may be greater than a thickness of each of the first to third color filters.

In an embodiment, the spacer may be located between two adjacent pixel regions emitting different colors of light among the first to third pixel regions.

Drawings

The accompanying drawings are included to provide a further understanding of the inventive concepts, and are incorporated in and constitute a part of this specification. The drawings illustrate some exemplary embodiments of the inventive concepts and together with the description serve to explain the principles of the inventive concepts. In the drawings:

fig. 1A is a perspective view of a display panel according to an embodiment of the inventive concept;

fig. 1B is a cross-sectional view of a display panel according to an embodiment of the inventive concept;

fig. 2A is a plan view of a display panel according to an embodiment of the inventive concept;

fig. 2B is an equivalent circuit diagram of the pixel shown in fig. 2A;

fig. 3 is a plan view of a pixel region of a display panel according to an embodiment of the inventive concept;

fig. 4 is a sectional view taken along line I-I' of fig. 3, according to an embodiment of the inventive concept;

fig. 5 is a view schematically illustrating optical characteristics of a control layer according to an embodiment of the inventive concept;

fig. 6 is a cross-sectional view of a pixel region of a display panel according to another embodiment of the inventive concept;

fig. 7 is a plan view of a pixel region of a display panel according to another embodiment of the inventive concept; and is

Fig. 8 is a cross-sectional view of a pixel region of a display panel according to another embodiment of the inventive concept.

Detailed Description

In this specification, when a component (or a region, layer, portion, or the like) is referred to as being "on," "connected to," or "combined with" another component, it means that the component may be directly on, connected or combined with the other component, or one or more other components may be present therebetween.

Like reference numerals refer to like elements. In addition, in the drawings, the thickness, proportion, and size of components may be exaggerated for clarity.

"and/or" includes all combinations of one or more of the referenced components.

It will be understood that the terms "first" and "second" are used herein to describe various components, but these components should not be limited by these terms. The above terms are used to distinguish one component from another. For example, a first component could be termed a second component, and vice-versa, without departing from the scope of the inventive concept. Unless the context clearly dictates otherwise, expressions in the singular include expressions in the plural.

In addition, terms such as "below", "under", "on" and "upper" are used to describe the relationship of the configurations shown in the drawings. Terms are described as relative concepts based on the orientations shown in the drawings. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Furthermore, 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 will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

In various embodiments of the inventive concept, the terms "comprises," "comprising," or any variation thereof, specify the presence of stated features, regions, integers, steps, processes, elements, and/or components, but do not preclude the presence or addition of other features, regions, integers, steps, processes, elements, components, and/or groups thereof.

Herein, some example embodiments of the inventive concept will be described with reference to the accompanying drawings.

Fig. 1A is a perspective view of a display panel according to an embodiment of the inventive concept; fig. 1B is a cross-sectional view of a display panel according to an embodiment of the inventive concept.

The display panel DP according to the embodiment of the inventive concept may be applied to a middle-sized electronic device such as a personal computer, a notebook computer, a personal digital terminal, a vehicle navigation unit, a game machine, a smart phone, a tablet computer, and a camera, in addition to a large-sized electronic device such as a monitor or an external signboard. However, these are only some examples, and it will be understood that the display panel DP may be applied in other electronic devices without departing from the scope of the inventive concept.

According to an embodiment of the inventive concept, the display panel DP may be any one of a liquid crystal display panel, an electrophoretic display panel, a Micro Electro Mechanical System (MEMS) display panel, an electrowetting display panel, and an organic light emitting display panel, but is not particularly limited thereto.

Although not separately shown, the display panel DP may further include a shelf member or a molding member, and may further include a backlight unit according to the type of the display panel DP.

Referring to fig. 1A, the display panel DP may include a lower display substrate 100 and an upper display substrate 200 spaced apart from the lower display substrate 100. As shown in fig. 1A, the display panel DP may display an image through the display surface DP-IS. The display surface DP-IS may be parallel to a plane defined by the first direction DR1 and the second direction DR 2.

The display surface DP-IS may include a display area DA and a non-display area NDA. The pixels PX are disposed in the display area DA and the pixels PX are not disposed in the non-display area NDA. In an embodiment, the non-display area NDA IS defined outside the periphery of the display surface DP-IS. In an embodiment, the display area DA may be surrounded by the non-display area NDA.

The normal direction of the display surface DP-IS (i.e., the thickness direction of the display panel DP) IS indicated by the third direction DR 3. In the present specification, the meaning of "viewing on a plane or lying on a plane" means a case of viewing in the third direction DR 3. The front surface (or upper surface) and the rear surface (or lower surface) of each of the layers or units described below are distinguished by the third direction DR 3. However, as a relative concept, the directions indicated by the first to third directions DR1, DR2, and DR3 may be converted into other directions, for example, opposite directions.

In the embodiment of the inventive concept, the display panel DP having the flat display surface DP-IS shown, but the inventive concept IS not limited thereto. In an embodiment, the display panel DP may include a curved display surface or a stereoscopic display surface. The stereoscopic display surface may include a plurality of display regions indicating different directions.

Referring to fig. 1B, an inner space (e.g., a predetermined inner space) GP may be defined between the upper display substrate 200 and the lower display substrate 100. the sealant S L M overlaps the non-display region NDA and may be disposed between the upper display substrate 200 and the lower display substrate 100. in addition, the inner space GP. the sealant S L M may be provided by the sealant S L M combining the upper display substrate 200 and the lower display substrate 100 to overlap the non-display region NDA and may include an organic adhesive member or an inorganic adhesive member.

Fig. 2A is a plan view of a display panel according to an embodiment of the inventive concept; fig. 2B is an equivalent circuit diagram of the pixel shown in fig. 2A.

Referring to fig. 2A, an arrangement relationship of signal lines G L1 to G L n and D L01 to D L1 m and pixels PX11 to PXnm on a plane is shown, the signal lines G L1 to G L n and D L1 to D L m may include a plurality of gate lines G L1 to G L n and a plurality of data lines D L1 to D L m.

Each of the pixels PX11 through PXnm is connected to a corresponding one of a plurality of gate lines G L1 through G L n and a corresponding one of a plurality of data lines D L1 through D L m Each of the pixels PX11 through PXnm may include a pixel driving circuit and a display element.

The pixels PX11 to PXnm may be arranged in a matrix, but are not limited thereto. In an embodiment, the pixels PX11 to PXnm may be set in the form of PenTile. In an embodiment, the pixels PX11 to PXnm may be arranged in a diamond form.

The gate driving circuit GDC may be disposed in the non-display area NDA. In an embodiment, the gate driver circuit GDC may be integrated into the display panel DP through a silicon oxide gate driver circuit (OSG) process or an amorphous silicon gate driver circuit (ASG) process.

Referring to fig. 2B, a pixel PX. connected to one gate line G L, one data line D L, and one power supply line P L among the pixels PX11 to PXnm is illustratively shown however, the configuration of the pixel PX is not limited thereto and may be variously implemented.

According to the inventive concept, the pixel PX includes a light emitting element O L ED and a pixel circuit pxc and the light emitting element O L ED includes a first electrode AE, a second electrode CE and a light emitting layer according to an embodiment, the light emitting element O L ED may emit light of a first color.

The light emitting layer, the first electrode AE, and the second electrode CE of the light emitting element O L ED may be included in the display element layer DP-O L ED (see fig. 4).

The pixel circuit PXC as a circuit portion for driving the light emitting element O L ED includes a first transistor T1 (or a switching transistor), a second transistor T2 (or a driving transistor), and a capacitor cap the pixel circuit PXC may be included in the circuit element layer DP-C L (see fig. 4).

The light emitting element O L ED generates light of the first color by the electric signals supplied from the first transistor T1 and the second transistor T2.

The first transistor T1 outputs a data signal applied to the data line D L in response to a gate signal applied to the gate line G L the capacitor Cap is charged with a voltage corresponding to the data signal received from the first transistor T1 the first power voltage E L VDD is supplied to the first electrode AE through the second transistor T2, the second power voltage E L VSS is supplied to the second electrode ce the second power voltage E L VSS may have a lower level than the first power voltage E L VDD.

The second transistor T2 is electrically connected to the light emitting element O L ED. through the first electrode AE the second transistor T2 controls the driving current ID. light emitting element O L ED corresponding to the amount of charge stored in the capacitor Cap, which flows to the light emitting element O L ED, and can emit light during the on period of the second transistor T2.

Fig. 3 is a plan view of a pixel region of a display panel according to an embodiment of the inventive concept; fig. 4 is a sectional view taken along line I-I' of fig. 3, according to an embodiment of the inventive concept; fig. 5 is a view schematically illustrating optical characteristics of a control layer according to an embodiment of the inventive concept.

Fig. 3 is an enlarged view of a portion of the display area DA shown in fig. 1A. Three types of pixel areas PXA-R, PXA-G and PXA-B are primarily shown. The three types of pixel areas PXA-R, PXA-G and PXA-B shown in fig. 3 may be repeatedly arranged throughout the entire display area DA. In this specification, the pixel region denotes a region through which light is actually emitted to the outside through the upper display substrate 200.

The light shielding area NPXA is disposed around the first to third pixel areas PXA-R, PXA-G and PXA-B. The first to third pixel areas PXA-R, PXA-G and PXA-B and the light blocking area NPXA may be substantially defined on the upper display substrate 200.

First to third pixel regions PXA-R, PXA-G and PXA-B having the same area on a plane are exemplarily shown in fig. 3, but the inventive concept is not limited thereto. In an embodiment, the first to third pixel regions PXA-R, PXA-G and PXA-B may have different areas, or at least two areas may be different from each other. In addition, although the first to third pixel areas PXA-R, PXA-G and PXA-B having rounded corner areas on a plane are shown, the inventive concept is not limited thereto. In an embodiment, the first to third pixel areas PXA-R, PXA-G and PXA-B on the plane may have another polygonal form.

One pixel region of the first to third pixel regions PXA-R, PXA-G and PXA-B provides a user with first color light having a wavelength band of a first color, another pixel region provides a user with second color light having a wavelength band of a second color different from the first color, and the remaining one pixel region provides a user with third color light having a wavelength band of a third color different from the first color and the second color.

According to an embodiment of the inventive concept, the first pixel area PXA-R provides red light, the second pixel area PXA-G provides green light, and the third pixel area PXA-B provides blue light. In this embodiment, the source light may be blue light as the third color light. The source light may be generated in a light source, such as a backlight unit, or may be generated in a display device, such as a light emitting diode.

The light shielding area NPXA sets boundaries of the first to third pixel areas PXA-R, PXA-G and PXA-B to prevent or substantially prevent color mixing between the first to third pixel areas PXA-R, PXA-G and PXA-B. Furthermore, the light-shielding region NPXA blocks the source light, so that the source light is not provided to the user.

Referring to fig. 4, the display panel DP includes a lower display substrate 100 and an upper display substrate 200.

The lower display substrate 100 includes a first base substrate BS1, a circuit element layer DP-C L, a display element layer DP-O L ED, and a cover layer CY.

The first base substrate BS1 may include a synthetic resin substrate or a glass substrate, the circuit element layer DP-C L includes circuit elements and at least one insulating layer, the circuit elements include signal lines and pixel circuits PXC, etc., shown in FIG. 2B, the circuit element layer DP-C L may be formed through a forming process of an insulating layer, a semiconductor layer, and a conductive layer by coating, deposition, etc., and a patterning process of an insulating layer, a semiconductor layer, and a conductive layer by a photolithography process.

The circuit element layer DP-C L may include a buffer film BF L, a first insulating layer 10, a second insulating layer 20, a third insulating layer 30, and first to third driving transistors T2-1, T2-2, and T2-3 the first and second insulating layers 10 and 20 according to the inventive concept may be inorganic films, and the third insulating layer 30 may be an organic film.

The first driving transistor T2-1 includes a first semiconductor pattern OSP1, a first control electrode GE1, a first input electrode DE1, and a first output electrode SE 1. The second driving transistor T2-2 includes a second semiconductor pattern OSP2, a second control electrode GE2, a second input electrode DE2, and a second output electrode SE 2. The third driving transistor T2-3 includes a third semiconductor pattern OSP3, a third control electrode GE3, a third input electrode DE3, and a third output electrode SE 3.

The first, second, and third semiconductor patterns OSP1, OSP2, and OSP3 are disposed on the buffer film BF L disposed on the first base substrate BS1 the first insulating layer 10 covers the first, second, and third semiconductor patterns OSP1, OSP2, and OSP3 and is disposed on the buffer film BF L.

The first, second, and third control electrodes GE1, GE2, and GE3 are overlapped with the first, second, and third semiconductor patterns OSP1, OSP2, and OSP3, respectively, and are disposed on the first insulating layer 10. The second insulation layer 20 covers the first, second, and third control electrodes GE1, GE2, and GE3, and is disposed on the first insulation layer 10.

The first input electrode DE1 and the first output electrode SE1 are disposed on the second insulating layer 20. Although not shown in the drawings, the first input electrode DE1 and the first output electrode SE1 may be connected to the first semiconductor pattern OSP1 through a first via hole penetrating the first insulating layer 10 and a second via hole penetrating the second insulating layer 20, respectively.

The second input electrode DE2 and the second output electrode SE2 are disposed on the second insulating layer 20. Although not shown in the drawings, the second input electrode DE2 and the second output electrode SE2 may be connected to the second semiconductor pattern OSP2 through a fourth via hole penetrating the first insulating layer 10 and a fifth via hole penetrating the second insulating layer 20, respectively.

The third input electrode DE3 and the third output electrode SE3 are disposed on the second insulating layer 20. Although not shown in the drawings, the third input electrode DE3 and the third output electrode SE3 may be connected to the third semiconductor pattern OSP3 through a seventh via hole penetrating the first insulating layer 10 and an eighth via hole penetrating the second insulating layer 20, respectively.

The third insulating layer 30 covers the first to third input electrodes DE1, DE2, and DE3 and the first to third output electrodes SE1, SE2, and SE3, and is disposed on the second insulating layer 20 the display element layer DP-O L ED may be disposed on the third insulating layer 30.

The display element layer DP-O L ED includes first to third light emitting elements O L ED-B1, O L ED-B2, and O L ED-B3 the first to third light emitting elements O L ED-B1, O L ED-B2, and O L ED-B3 may overlap the first to third pixel regions PXA-R, PXA-G and PXA-B, respectively.

The first light emitting element O L ED-B1 includes a first sub-electrode AE1, a second electrode CE, a first hole control layer HC L1, a first electron control layer EC L1, and a first light emitting layer EN L1 the first sub-electrode AE1 is disposed on the third insulating layer 30 the first sub-electrode AE1 is connected to the first output electrode se1 through a third via passing through the third insulating layer 30 a light emission opening OM is defined in the pixel defining layer PD L hereinafter, the light emission opening OM refers to a region where light is emitted through the light emitting element in this specification.

The first hole control layer HC L may include a hole transport layer, and may further include a hole injection layer, the first light emitting layer EN L1 is disposed on the first hole control layer HC L, the first light emitting layer EN L may be disposed in a region corresponding to the light emission opening OM, the first light emitting layer EN L may output a first color light, the first electron control layer EC L is disposed on the first light emitting layer EN L, the first electron control layer EC L may include an electron transport layer, and may further include an electron injection layer, the second light emitting element O L ED-B2 includes a second sub-electrode AE2, a second electrode CE, a second hole control layer HC L, a second electron control layer EC L, and a second light emitting layer EN L2, the second sub-electrode AE2 disposed on the third insulating layer 30 is connected to the second output electrode se2 through a sixth via hole control layer HC 2, the second hole control layer HC 8 HC 2 may be disposed integrally with the first hole control layer HC L, and the second electron control layer EC L may be disposed integrally with the first hole control layer EC 638.

The third light emitting element O L ED-B3 includes a third sub-electrode AE3, a second electrode CE, a third hole control layer HC L3, a third electron control layer EC L3, and a third light emitting layer EN L3 the third sub-electrode AE3 disposed on the third insulating layer 30 is connected to the third output electrode se3 through a ninth via hole the third hole control layer HC L3 may be integrally disposed with the first hole control layer HC L1, and the third electron control layer EC L3 may be integrally disposed with the first electron control layer EC L1.

The structures of the second light emitting element O L ED-B2 and the third light emitting element O L ED-B3 may be substantially the same as the structure of the first light emitting element O L ED-B1.

According to an embodiment of the inventive concept, the first to third light emitting layers EN L1, EN L2, and EN L3 may be provided in an integrated shape, that is, the first to third light emitting layers EN L1, EN L2, and EN L3 may be integrally provided on the first to third sub-electrodes AE1, AE2, and AE3, further, the second electrode CE may be provided in an integrated shape, and may be provided on the first to third light emitting layers EN L1, EN L2, and EN L3.

The cover layer CY may be disposed on the second electrode CE. The capping layer CY may be provided as an insulating layer including an organic material or an inorganic material. In one embodiment, the cover layer CY may be omitted.

The upper display substrate 200 includes a second base substrate BS2, a light blocking member BM, a color filter layer FY, a light control layer (also referred to as a color control layer) CC L, a low refractive layer L Y, and a plurality of spacers CS1, CS2, and CS 3.

The second base substrate BS2 includes a synthetic resin substrate or a glass substrate, and may face the first base substrate BS1 in the third direction DR 3. In this specification, the second base substrate BS2 may be described as an upper base substrate.

The light shielding member BM overlaps the light shielding region NPXA in a plane, and may be disposed on the second base substrate BS 2. As an example, the light shielding member BM may be directly disposed on the second base substrate BS 2.

The color filter layer FY may include first to third color filters CF1, CF2, and CF 3. The first to third color filters CF1, CF2, and CF3 may overlap the first to third pixel areas PXA-R, PXA-G and PXA-B, respectively. In one example, each of the first to third color filters CF1, CF2, and CF3 may partially overlap the light-shielding region NPXA.

The first to third color filters CF1 to CF3 may receive light transmitted through the light control layer CC L and transmit the light to the second base substrate BS 2.

In more detail, the first color filter CF1 is provided with a second color corresponding to red and may transmit light of the second color the first color filter CF1 may receive light of the second color from the optical control layer CC L and may emit light of the second color to the first pixel region PXA-R.

The second color filter CF2 may receive the light of the third color from the light control layer CC L and may emit the light of the third color to the second pixel area PXA-G.

The third color filter CF3 may be provided with a first color corresponding to blue and may transmit light of the first color the third color filter CF3 may receive light of the first color from the light control layer CC L and may emit light of the first color to the third pixel area PXA-B.

The light control layer CC L may include a light emitter disposed on the color filter layer FY, which converts the first color light emitted from the display element layer DP-O L ED to emit the converted light as light of a color different from the first color.

The light control layer CC L includes a first conversion portion CCF1, a second conversion portion CCF2, and a transmission portion CCF 3. the first conversion portion CCF1 converts light of a first color emitted by a portion of the first light emitting layer EN L corresponding to a portion of the first sub-electrode AE1 exposed by the first light emitting opening portion and outputs the converted light as light of a second color different from the first color.

The second conversion part CCF2 converts light of the first color emitted by a portion of the second light emitting layer EN L2 corresponding to a portion of the second sub-electrode AE2 exposed by the second light emitting opening portion and outputs the converted light of the first color as light of a third color different from the first color and the second color the second conversion part CCF2 may emit light of the third color to the second color filter CF 2.

The transmissive portion CCF3 may transmit light of the first color emitted by a portion of the third light-emitting layer EN L3 corresponding to a portion of the third sub-electrode AE3 exposed by the third light-emitting opening portion the transmissive portion CCF3 may emit light of the first color to the third color filter CF 3.

In the embodiment, referring to fig. 5, the first light emitter EP-R converts the first color light (B light) as blue light and emits the second color light (R light) as red light, and the second light emitter EP-G converts the first color light (B light) and emits the third color light (G light) as green light. The transmissive portion CCF3 may be a portion that does not contain a light emitter. The transmission portion CCF3 may be a portion that transmits the first color light.

In addition, the first transition portion CCF1, the second transition portion CCF2, the third transition portion and the CCF3 may include a matrix resin BR. The matrix resin BR may be a polymer resin. For example, the matrix resin BR may be an acrylic resin, a urethane resin, a silicone resin, an epoxy resin, or the like. The matrix resin BR may be a transparent resin.

In addition, each of the first conversion portion CCF1, the second conversion portion CCF2, and the transmission portion CCF3 may further include scattering particles O L in an embodiment, the scattering particles O L may be TiO₂The scattering particles O L in the first and second conversion parts CCF1 and CCF2 may scatter light emitted from the light emitter and may emit the scattered light to the outside of the conversion part, and further, in the case of transmitting the provided light as it is, the scattering particles O L in the transmission part CCF3 may scatter the provided light and emit it to the outside.

In other words, in an embodiment, the color control layer CC L may include at least one of a fluorescent substance and a quantum dot as the light emitters EP-R and EP-G.

For example, the fluorescent substances used as the first and second light emitters EP-R and EP-G may be inorganic fluorescent substances. In the display panel DP according to the embodiment, the fluorescent substances used as the first and second light emitters EP-R and EP-G may be red and green fluorescent substances.

The green phosphor may comprise a phosphor selected from YBO₃:Ce³⁺,Tb³⁺、BaMgAl₁₀O₁₇:Eu²⁺,Mn²⁺、(Sr,Ca,Ba)(Al,Ga)₂S₄:Eu²⁺；ZnS:Cu,Al、Ca₈Mg(SiO₄)₄Cl₂:Eu²⁺,Mn²⁺；Ba₂SiO₄:Eu²⁺；(Ba,Sr)₂SiO₄:Eu²⁺；Ba₂(Mg,Zn)Si₂O₇:Eu²⁺；(Ba,Sr)Al₂O₄:Eu²⁺、Sr₂Si₃O₈·2SrCl₂:Eu²⁺At least one selected from the group consisting of.

The red phosphor may include red phosphor composed of (Sr, Ca, Ba, Mg)P₂O₇:Eu²⁺,Mn²⁺、CaLa₂S₄:Ce³⁺；SrY₂S₄:Eu²⁺、(Ca,Sr)S:Eu²⁺、SrS:Eu²⁺、Y₂O₃:Eu³⁺,Bi³⁺；YVO₄:Eu³⁺,Bi³⁺；Y₂O₂S:Eu³⁺,Bi³⁺；Y₂O₂S:Eu³⁺At least one selected from the group consisting of.

However, the kind of the fluorescent substance used in the color control layer CC L is not limited to the above-described material.

In other embodiments, the first and second emitters EP-R and EP-G included in the color control layer CC L may be quantum dots.

The II-VI compound may be selected from the group consisting of binary compounds selected from the group consisting of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and any mixture thereof; the ternary compound is selected from the group consisting of AgInS, CuInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS, and any mixture thereof; the quaternary compound is selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, and any mixture thereof.

The III-V compound may be selected from the group consisting of binary compounds, ternary compounds, and quaternary compounds, the binary compounds being selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and any mixtures thereof; the ternary compound is selected from the group consisting of GaNP, GaNAs, GaNSb, GaAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InNAs, InNSb, InPAs, InPSb, and any mixture thereof; the quaternary compound is selected from the group consisting of GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, gainp, GaInNAs, gainsb, GaInPAs, GaInPSb, inalnnp, InAlNSb, inaipas, InAlPSb, and any mixture thereof.

The group IV-VI compound may be selected from the group consisting of binary compounds selected from the group consisting of SnS, SnSe, SnTe, PbS, PbSe, PbTe, and any mixture thereof; the ternary compound is selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and any mixture thereof; the quaternary compound is selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe, and any mixture thereof. The group IV element may be selected from the group consisting of Si, Ge, and mixtures thereof. The group IV compound may be a binary compound selected from the group consisting of SiC, SiGe, and a mixture thereof.

In these cases, the binary, ternary, or quaternary compound may be present in the quantum dot in a substantially uniform concentration. Alternatively, the concentration of the binary, ternary, or quaternary compound in one portion of the quantum dot may be different from the concentration of the binary, ternary, or quaternary compound in another portion of the quantum dot.

In an embodiment, the quantum dot may have a core-shell structure including a core and a shell surrounding the core. Alternatively, the luminophore may have a core-shell structure in which one quantum dot surrounds another quantum dot. The interface of the core and the shell may have a concentration gradient in which the concentration of the element present in the shell gradually decreases toward the center.

The quantum dots may be nano-sized particles. The quantum dots may have a full width at half maximum (FWHM) of an emission wavelength spectrum of about 45nm or less, in embodiments about 40nm or less, and in embodiments about 30nm or less, and color purity and/or color reproducibility may be improved in this range. In addition, light emitted through the quantum dots may be emitted in all directions, and thus, a wide viewing angle may be improved or realized.

Further, the shape of the quantum dot may be a general shape known in the art, but is not limited to a specific shape. For example, the quantum dots may have a spherical shape, a conical shape, a multi-arm shape, a cubic nanoparticle shape, a nanotube shape, a nanowire shape, a nanofiber shape, or a nanoplatelet particle shape.

According to an embodiment of the inventive concept, the quantum dots may change the color of emitted light according to particle size. In an embodiment, when the first and second light emitters EP-R and EP-G are quantum dots, the grain size of the first and second light emitters EP-R and EP-G may be different from each other. For example, the first light emitter EP-R may have a larger grain size than the second light emitter EP-G. In an embodiment, the first light emitter EP-R may emit light of a wavelength longer than that of the light emitted by the second light emitter EP-G.

On the other hand, a portion of the first color light supplied from the first light emitting element O L ED-B1 may be transmitted to the outside as it is without being converted by the first light emitter EP-R if the first color filter CF1 is omitted, a portion of the first color light may be emitted to the outside through the second base substrate BS 2.

However, according to an embodiment of the inventive concept, since the first color filter CF1 converts the first color light transmitted through the first conversion part CCF1, the first color light is not transferred to the second base substrate BS2 through the first color filter CF 1. Therefore, the light of the second color emitted through the first conversion portion CCF1 may be output through the second base substrate BS2 without being mixed with other colors. As a result, color visibility can be improved.

Referring again to fig. 4, a low refractive layer L Y may be disposed between the light control layer CC L and the color filter layer FY.

According to an embodiment of the inventive concept, the refractive index of the optical control layer CC L may be higher than that of the low refractive layer L Y, that is, the refractive index of the matrix resin BR included in the first, second and transmissive portions CCF1, 2 and CCF3 may be higher than that of the low refractive layer L Y, a portion of light output from the first, second and transmissive portions CCF1, 2 and 3 may be totally reflected at the interface of the low refractive layer L Y due to a refractive index difference between the low refractive layer L Y and the optical control layer CC L, and as a result, the totally reflected light may be scattered again by the scattering particles O L described with reference to fig. 5 and may be emitted to the outside, as described above, the characteristics of light emitted from the first, second and transmissive portions CCF1, 2 and CCF3 may be improved by the low refractive layer L Y.

Also, as described above with reference to fig. 1B, the internal space GP may be disposed between the lower display substrate 100 and the upper display substrate 200 spaced apart by the sealant S L M, for example, the first conversion portion CCF1, the second conversion portion CCF2, and the transmission portion CCF3 of the upper display substrate 200 may be spaced apart from the cover layer CY of the lower display substrate 100 in the third direction DR3 at a certain interval (e.g., a predetermined interval), if the cover layer CY is omitted, the first conversion portion CCF1, the second conversion portion CCF2, and the transmission portion CCF3 may face the light emitting elements.

The separation distance between the first conversion portion CCF1, the second conversion portion CCF2, and the transmissive portion CCF3 and the cover layer CY in the third direction DR3 should be kept constant. Here, the separation distance in the third direction DR3 between the first conversion portion CCF1, the second conversion portion CCF2, and the transmissive portion CCF3 and the cover layer CY will be described as an internal separation distance Dk.

If the internal separation distance Dk is greater than or less than the set length, color mixing may occur in the image output from the display panel DP or visibility may be deteriorated. For example, if it is assumed that the display panel DP emits an image only through the first pixel areas PXA-R, when the internal separation distance Dk remains normal, the second color light is emitted only through the first pixel areas PXA-R and no light is emitted through the second and third pixel areas PXA-G and PXA-B.

For example, when the internal separation distance Dk increases due to the movement of the display panel DP, the light of the first color emitted from the first light emitting elements O L ED-B1 may be partially transferred to the second conversion section CCF2 in addition to being transferred to the first conversion section CCF 1. in this case, color mixing may occur in which the light of the second color emitted through the first conversion section CCF1 and the light of the third color emitted through the second conversion section CCF2 are mixed.

According to an embodiment of the inventive concept, a plurality of spacers CS1, CS2, and CS3 are disposed between the upper display substrate 200 and the lower display substrate 100, so that a separation space between the upper display substrate 200 and the lower display substrate 100 may be disposed. Here, the separation space may be substantially the same as the inner space GP shown in fig. 1B, and may be provided as an air layer, for example. As a result, the internal separation distance Dk between the upper display substrate 200 and the lower display substrate 100 spaced apart by the spacers CS1, CS2, and CS3 may be kept constant. Each of the plurality of spacers CS1, CS2, and CS3 may be provided with a thickness of the internal separation distance Dk.

Further, each of the spacers CS1, CS2, and CS3 may not overlap the light emitting opening portion OM. Since the spacers CS1, CS2, and CS3 do not overlap the light emission opening portion OM, light emitted through the light emission opening portion OM is not reflected by the spacers CS1, CS2, and CS 3.

More specifically, the spacers CS1, CS2, and CS3 include a first spacer CS1, a second spacer CS2, and a third spacer CS 3. As shown in fig. 4, the first to third spacers CS1 to CS3 may partially overlap the first to third pixel regions PXA-R, PXA-G and PXA-B, respectively. Further, the first to third spacers CS1 to CS3 may partially overlap the light shielding region NPXA (i.e., the light shielding member BM).

According to the inventive concept, although the first to third spacers CS1 to CS3 corresponding to the first to third pixel regions PXA-R, PXA-G and PXA-B are shown, one spacer corresponding to one pixel region may be provided.

The first spacer CS1 is disposed between the first conversion portion CCF1 and the cover CY, in the embodiment, one end of the first spacer CS1 directly contacts the first conversion portion CCF1, and the other end of the first spacer CS1 may directly contact the cover CY. as another example, the first spacer CS1 is disposed between the first conversion portion CCF1 and the first light emitting element O L ED-B1, that is, when the cover CY is omitted, one end of the first spacer CS1 may directly contact the first conversion portion CCF1, and the other end of the first spacer CS1 may directly contact the second electrode CE of the first light emitting element O L ED-B1.

The second spacer CS2 is disposed between the second conversion portion CCF2 and the cover CY in the embodiment, one end of the second spacer CS2 directly contacts the second conversion portion CCF2 and the other end of the second spacer CS2 may directly contact the cover CY. as another example, the second spacer CS2 is disposed between the second conversion portion CCF2 and the second light emitting element O L ED-B2, that is, when the cover CY is omitted, one end of the second spacer CS2 may directly contact the second conversion portion CCF2 and the other end of the second spacer CS2 may directly contact the second electrode CE of the second light emitting element O L ED-B2.

The third spacer CS3 is disposed between the transmission portion CCF3 and the cover layer CY in the embodiment, one end of the third spacer CS3 directly contacts the transmission portion CCF3, and the other end of the third spacer CS3 may directly contact the cover layer CY. as another example, the third spacer CS3 is disposed between the transmission portion CCF3 and the third light emitting element O L ED-B3, that is, when the cover layer CY is omitted, one end of the third spacer CS3 may directly contact the transmission portion CCF3, and the other end of the third spacer CS3 may directly contact the second electrode CE of the third light emitting element O L ED-B3.

In addition, each of the first to third spacers CS1 to CS3 according to an embodiment of the inventive concept may be set to black, and as a result, since the first to third spacers CS1 to CS3 are set to black, it is possible to prevent or substantially prevent color mixing of light emitted from the first to third light emitting elements O L ED-B1 to O L ED-B3.

Fig. 6 is a cross-sectional view of a pixel region of a display panel according to another embodiment of the inventive concept.

As compared with the display panel DP shown in fig. 4, with respect to the display panel DPa shown in fig. 6, a configuration in which the filler IF is added, and the remaining structure may be substantially the same. Therefore, further description of the remaining components is omitted for convenience of explanation.

Referring to fig. 6, a packing IF may be included in the inner space GP. In an embodiment, the filler IF may be completely filled in the inner space GP. Since the filler IF is filled in the inner space GP, the internal separation distance Dk between the first conversion portion CCF1, the second conversion portion CCF2, and the transmission portion CCF3 and the cover layer CY can be kept constant.

In addition, the filler IF may be provided as a transparent material, that is, the filler IF may transmit light emitted from the first light emitting element O L ED-B1 to the third light emitting element O L ED-B3.

Fig. 7 is a plan view of a pixel region of a display panel according to another embodiment of the inventive concept.

In an embodiment, the first to third pixel areas PXA-R, PXA-G and PXA-B shown in fig. 3 may be sequentially alternately arranged along the first direction DR 1. In addition, each of the first to third pixel areas PXA-R, PXA-G and PXA-B may be arranged as a pixel area emitting light of the same color in the second direction DR 2. For example, the first pixel regions PXA-R may be arranged in the second direction DR2 and may be provided as a plurality of first pixel regions for emitting the second color light. The second pixel regions PXA-G may be arranged in the second direction DR2 and may be provided as a plurality of second pixel regions for emitting the third color light. The third pixel regions PXA-B may be arranged in the second direction DR2 and may be provided as a plurality of third pixel regions for emitting the first color light.

In the embodiment, as shown in fig. 7, the first to third pixel regions PXA-R1, PXA-G1 and PXA-B1 are arranged in the first row, and the first to third pixel regions PXA-R2, PXA-G2 and PXA-B2 are arranged in the second row.

According to another embodiment of the inventive concept, the first spacer CS1a may be disposed between the first pixel regions arranged in the second direction DR 2. For example, the first spacer CS1a may be disposed between the first pixel region PXA-R1 and the first pixel region PXA-R2.

The second spacer CS2a may be disposed between the second pixel regions arranged in the second direction DR 2. For example, the second spacer CS2a may be disposed between the second pixel region PXA-G1 and the second pixel region PXA-G2.

The third spacer CS3a may be disposed between the third pixel regions arranged in the second direction DR 2. For example, the third spacer CS3a may be disposed between the third pixel region PXA-B1 and the third pixel region PXA-B2.

According to an embodiment of the inventive concept, a plurality of spacers maintaining the internal separation distance Dk shown in fig. 4 constant are disposed between the pixel regions. Further, each of the plurality of spacers shown in fig. 7 may overlap the light shielding region NPXA.

Fig. 8 is a sectional view of a display panel according to another embodiment of the inventive concept.

As compared with the display panel DP shown in fig. 4, with respect to the display panel DPb shown in fig. 8, the structure of the spacer is modified, and the structure of the remaining configuration may be substantially the same. Therefore, for convenience of explanation, further description of the remaining structure is omitted, and the structure of the spacer is mainly described.

Referring to fig. 8, the lower display substrate 100 and the upper display substrate 200 may be spaced apart from each other in the third direction DR3 by a spacer CSa.

According to an embodiment of the inventive concept, the first conversion part CCF1, the second conversion part CCF2, and the transmission part CCF3 may be spaced apart from each other on a plane. The first space may be disposed between the first and second conversion parts CCF1 and CCF2 separated from each other in the first direction DR 1. The second space may be disposed between the second conversion part CCF2 and the transmissive part CCF3 separated from each other in the first direction DR 1. The third space may be disposed between the transmission part CCF3 and the first conversion part CCF1 separated from each other in the first direction DR 1.

Specifically, the spacer CSa may be provided in a space of at least one of the first to third spaces, and may be provided in a shape extending from the light shielding member BM. That is, the spacer CSa may be disposed between two adjacent pixel areas emitting different colors of light among the first to third pixel areas PXA-R, PXA-G and PXA-B.

In addition, the spacer CSa may overlap the light shielding region NPXA. One end of each of the spacers CSa may be connected to the light blocking member BM, and the other end of each of the spacers CSa may be connected to the lower display substrate 100.

In addition, the first to third color filters CF1 to CF3 may be separated by a spacer CSa. For example, the first color filter CF1 and the second color filter C2 may be separated by any one of the spacers CSa, and the second color filter CF2 and the third color filter CF3 may be separated by another one of the spacers CSa.

According to an embodiment of the inventive concept, the thickness of each of the spacers CSa may be greater than the thickness of each of the first to third color filters CF1 to CF3 in the thickness direction of the upper display substrate 200. Further, in the thickness direction of the upper display substrate 200, the thickness of each of the spacers CSa may be greater than the thickness of each of the first conversion portion CCF1, the second conversion portion CCF2, and the transmission portion CCF 3. That is, each of the spacers CSa may be connected to the light shielding member BM through two adjacent conversion portions. As a result, the thickness of each of the spacers CSa may be greater than the sum of the thickness of the conversion part and the thickness of the color filter.

According to the above description, since each of the spacers CSa passes through the conversion part and is connected to the light shielding member BM, light emitted from the first to third light emitting elements O L ED-B1, O L ED-B2 and O L ED-B3 of the lower display substrate 100 may be transmitted to the first conversion part CCF1, the second conversion part CCF2 and the transmission part CCF3 without mixing.

According to an embodiment of the inventive concept, a plurality of spacers may connect the light control layer with the lower display substrate. Thus, the internal separation distance between the light control layer and the lower display substrate may be kept constant by the spacers.

Accordingly, since a phenomenon of mixing different colors of light is prevented or substantially prevented by the spacer, the overall visibility of the display device may be improved.

Although a few exemplary embodiments of the inventive concept have been described, it is to be understood that the inventive concept is not limited to those exemplary embodiments, but that various changes and modifications may be effected therein by one of ordinary skill in the pertinent art within the spirit and scope of the inventive concept as claimed herein.