Patent ID: 12193299

DETAILED DESCRIPTION OF THE EMBODIMENTS

The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which example embodiments of the invention are shown. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the instant specification and the drawings, like elements may be designated by the same reference numerals.

The size, thickness, and angles of each configuration shown in the drawings may be exaggerated for clarity, however, it is to be assumed that the arrangement shown may be taken as a specific example.

It will be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being “directly on” another element, there are no intervening elements present. The word “on” or “above” may mean positioned either above or below the object portion, and does not necessarily mean positioned on the upper side of the object portion based on a gravitational direction.

Unless explicitly described to the contrary, the word “comprise” and variations such as “comprises” or “comprising” will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

The phrase “in a plan view” means viewing an object portion from the top, and the phrase “in a cross-sectional view” means viewing a cross-section of which the object portion is vertically cut from the side.

A display device according to an embodiment of the present invention will now be described in detail with reference to accompanying drawings.

FIG.1shows a display device according to an embodiment of the present disclosure.FIG.1shows a ground plan view of a display device, illustrating a color filter230and a light blocking member220positioned on an upper side of the display device.FIG.2shows a cross-sectional view of a display device according to an embodiment of the present disclosure with respect to a line II-II′ ofFIG.1.FIG.2shows a central part of a display device in accordance with embodiments of the present disclosure. Referring toFIG.2, the display device includes a substrate110, a plurality of transistors (TR) positioned on the substrate, a first electrode191connected to the respective transistors (TR), and an insulating layer180positioned between the transistor (TR) and the first electrode191.

A plurality of partition walls350are positioned on the insulating layer180, and the partition walls350may include a plurality of openings355overlapping the first electrode191.

The partition walls350may include a black material. For example, the partition walls350may include a light blocking material, and the partition walls350may block the light at a lower portion of the partition walls350.

Respective emission layers360are positioned in the openings355. The emission layers360may include a first emission layer360R, a second emission layer360G, and a third emission layer360B. The first emission layer360R may be a red emission layer, the second emission layer360G may be a green emission layer, and the third emission layer360B may be a blue emission layer.

A second electrode270is positioned on the emission layers360and the partition wall350. The respective emission layers360may emit light according to voltages supplied from the first electrode191and the second electrode270. The first electrode191, the second electrode270, and the emission layer360may configure a light emitting element.

Referring toFIG.2, an encapsulation layer390is positioned on the second electrode270. The encapsulation layer390may have a multi-layered structure in which inorganic layers and organic layers are alternately stacked.

A light blocking member220is positioned on the encapsulation layer390. The light blocking member220may overlap the partition wall350in a direction that is perpendicular to a side of the substrate110. As shown inFIG.1, the light blocking member220may include a plurality of openings overlapping the emission layers360, and the color filters230may be positioned in the openings. The color filters230may include a first color filter230R, a second color filter230G, and a third color filter230B. The first color filter230R may be a red color filter, the second color filter230R may be a green color filter, and the third color filter230B may be a blue color filter.

The light blocking member220may be divided into a first light blocking member220_RG, a second light blocking member220_GB, and a third light blocking member220_BR according to adjacent color filters. The first light blocking member220_RG indicates a portion positioned between the first color filter230R and the second color filter230G. The second light blocking member220_GB indicates a portion positioned between the second color filter230G and the third color filter230B. The third light blocking member220_BR indicates a portion positioned between the third color filter230B and the first color filter230R.

In the cross-sectional diagram ofFIG.2, for better comprehension and ease of description, the light blocking member220is referred to as the first light blocking member220_RG, the second light blocking member220_GB, and the third light blocking member220_BR, but as shown inFIG.1, the first light blocking member220_RG, the second light blocking member220_GB, and the third light blocking member220_BR may be connected as a single body. For example, the first light blocking member220_RG, the second light blocking member220_GB, and the third light blocking member220_BR may refer to a predetermined region of the light blocking member220connected as one singular and uninterrupted body.

Referring toFIG.2, widths of the first light blocking member220_RG to the third light blocking member220_BR are different from each other. When the width of the first light blocking member220_RG is set to be H1, the width of the second light blocking member220_GB is set to be H2, and the width of the third light blocking member220_BR is set to be H3, such that a relationship of H3≥H2≥H1 may be satisfied. For example, regarding the display device according to the present embodiment, the width (H3) of the third light blocking member220_BR may be the largest, and the width (H1) of the first light blocking member220_RG may be the smallest. This arrangement may provide color characteristics that do not change noticeably according to the viewing angle and do not require the inclusion of a polarization layer. Detailed effects will be described in a later portion of the present specification.

A difference between the width (H3) of the third light blocking member220_BR and the width (H1) of the second light blocking member220_GB may be within a range of 1 μm to 10 μm. A difference between the width (H2) of the second light blocking member220_GB and the width (H1) of the first light blocking member220_RG may be within a range of 1 μm to 10 μm.

Referring toFIG.2, the respective emission layers360are positioned in the openings355of the partition wall350. The partition wall350is positioned on respective sides of the emission layer360, and the distances (W) between one edge of the partition wall350contacting the emission layer360and the light blocking member220overlapping the partition wall350are different for the respective pixels.

For example, as shown inFIG.2, the first emission layer360R is positioned to contact the third light blocking member220_BR and the first light blocking member220_RG. A separation distance between the one edge of the partition wall350contacting the first emission layer360R and the third light blocking member220_BR and a separation distance between the one edge of the partition wall350contacting the first emission layer360R and the first light blocking member220_RG may be the same, which will be referred to as Wr.

The second emission layer360G is positioned to contact the first light blocking member220_RG and the second light blocking member220_GB. A separation distance between the one edge of the partition wall350contacting the second emission layer360G and the first light blocking member220_RG and a separation distance between the one edge of the partition wall350contacting the second emission layer360G and the second light blocking member220_GB may be the same, which will be referred to as Wg.

The third emission layer360B is positioned near the second light blocking member220_GB and the third light blocking member220_BR. A separation distance between the one edge of the partition wall350contacting the third emission layer360B and the second light blocking member220_GB and a separation distance between the one edge of the partition wall350contacting the third emission layer360B and the third light blocking member220_BR may be the same, which will be referred to as Wb.

Referring toFIG.2, separation distances between the one edge of the partition wall350contacting the respective emission layers and the light blocking member may satisfy the relationship of Wg≥Wr≥Wb. For example, the distance (Wg) between the one edge of the partition wall350contacting the second emission layer360G and the light blocking member may be the longest, and the distance (Wb) between the one edge of the partition wall350contacting the third emission layer360B and the light blocking member may be the shortest.

Referring toFIG.2, the distance (Wr) between the partition wall350contacting the first emission layer360R and the light blocking member may be within a range of 3.5 μm to 5.5 μm. For example, the distance (Wr) between the one edge of the partition wall350contacting the first emission layer360R and the light blocking member may be 4.5 μm. This numerical value represents the separation distance for efficiently transmitting the light emitted by the first emission layer360R in all directions. For example, the first emission layer360R is separated from the light blocking member, so the light output to the side as well as to the front from the first emission layer360R may be discharged to the outside of the display device.

In the present embodiment, the difference between Wr and Wg may be equal to or less than 5 μm. In an embodiment, Wg may be greater than Wr by 1 μm. In the present embodiment, the difference between Wr and Wb may be equal to or less than 5 μm. In an embodiment, Wr may be greater than Wb by 1 μm.

When the difference between Wr and Wg is equal to or greater than 5 μm or the difference between Wr and Wb is equal to or greater than 5 μm, a region of the emission layer may be excessively narrow, or the size of the partition wall may be excessively reduced, which may be undesirable.

When the distance between the emission layer and the neighboring light blocking member is set to be different for the respective pixels, the display device including no polarization layer may maintain the lateral color coordinate in a similar way to the display device including a polarization layer.

For example, the display device according to the present embodiment does not include the polarization layer. Instead of this, the partition wall350includes a black material to block light and overlaps the emission layer360, and the color filter230is positioned to replace a function of the polarization layer. The display device including no polarization layer, as described above, may have a color difference of the lateral side from the display device including a polarization layer. The display device including a polarization layer has a greenish color sense by an optical path that is difference when seen from the lateral side, and the display device including no polarization layer may have a bluish color.

The display device may satisfy the relationship of “the distance (Wg) between the one edge of the partition wall contacting the second emission layer (green) and the light blocking member≥the distance (Wr) between the one edge of the partition wall contacting the first emission layer (red) and the light blocking member≥the distance (Wb) between the one edge of the partition wall contacting the third emission layer (blue) and the light blocking member.”

The width of the light blocking member may satisfy the relationship of “the width (H3) of the third light blocking member≥the width (H2) of the second light blocking member≥the width (H1) of the first light blocking member.”

By this, the display device including no polarization layer may have a similar color sense visible from the lateral side to the display device including a polarization layer.

The present invention may satisfy at least one of the relationship of the width of the light blocking member (the width (H3) of the third light blocking member≥the width (H2) of the second light blocking member the width (H1) of the first light blocking member), and the distance relationship with the light blocking member (the distance (Wg) between the one edge of the partition wall contacting the second emission layer (green) and the light blocking member the distance (Wr) between the one edge of the partition wall contacting the first emission layer (red) and the light blocking member≥the distance (Wb) between the one edge of the partition wall of the third emission layer (blue) and the light blocking member).

For example, when one of the two relationships is satisfied, effects of the present disclosure may be exhibited.

FIG.2shows the case that satisfies the two relationships, and the case that satisfies one of the two relationships is also included within the present invention.

FIG.3shows a same cross-sectional view asFIG.2on a display device according to an embodiment of the present disclosure.

Referring toFIG.3, the display device has the relationship of “the distance (Wg) between the one edge of the partition wall contacting the second emission layer (green) and the light blocking member≥the distance (Wr) between the one edge of the partition wall contacting the first emission layer (red) and the light blocking member≥the distance (Wb) between the one edge of the partition wall contacting the third emission layer (blue) and the light blocking member,” but has the relationship of “the width (H3) of the third light blocking member=the width (H2) of the second light blocking member=the width (H1) of the first light blocking member,” which is different from what is described with reference toFIG.2. To the extent that a detailed description of a particular element has been omitted, it may be assumed that the element is at least similar to corresponding elements that have been disclosed elsewhere within the instant specification.

As shown inFIG.3, it is given that H3=H2=H1, and the case of Wg>Wr>Wb may also have similar effects to what is described with reference toFIG.2.

FIG.4shows a same cross-sectional view asFIG.2on a display device according to an embodiment of the present disclosure. Referring toFIG.4, the display device satisfies the relationship of “the width (H3) of the third light blocking member≥the width (H2) of the second light blocking member the width (H1) of the first light blocking member”, but also satisfies the relationship of “the distance (Wg) between the one edge of the partition wall contacting the second emission layer (green) and the light blocking member=the distance (Wr) between the one edge of the partition wall contacting the first emission layer (red) and the light blocking member=the distance (Wb) between the one edge of the partition wall contacting the third emission layer (blue) and the light blocking member,” which is different from what is described with reference toFIG.2. To the extent that a detailed description of a particular element has been omitted, it may be assumed that the element is at least similar to corresponding elements that have been disclosed elsewhere within the instant specification.

As shown inFIG.4, it is given that H3>H2>H1, and the case of Wg=Wr=Wb may also have similar effects to what is described with reference toFIG.2.

Effects of the display device according to the present embodiment will now be described in detail.

FIG.5shows a display device including a polarization layer400. In the case of the embodiment described with reference toFIG.2, not the polarization layer but the partition wall350includes a light blocking material, and the color filter230is positioned to replace the function of the polarization layer. Referring toFIG.5, the partition wall350does not include a light blocking material and includes a polarization layer400instead of the color filter230.

FIG.6shows a display device including no polarization layer400in a like manner of what is shown inFIG.2. However, differing from what is described with reference toFIG.2, regarding the case ofFIG.6, the widths of the respective light blocking members are the same (H1=H2=H3), and simultaneously the distances between the respective emission layers and the light blocking member are the same (Wr=Wg=Wb)

Table 1 expresses movements of the color coordinates while visible angles are changed for the embodiment (Experimental Example 1) described with reference toFIG.5and the embodiment (Experimental Example 2) described with reference toFIG.6.FIG.7shows color coordinates of Table 1.

TABLE 1ExperimentalExperimentalExample 1Example 2(POL)(POL x)ThetaxyxyT = 0°0.3050.3210.3050.321T = 5°0.3050.3210.3050.321T = 10°0.3050.3200.3050.321T = 15°0.3040.3190.3040.319T = 20°0.3030.3180.3020.317T = 25°0.3000.3160.3000.315T = 30°0.2940.3140.2980.316T = 35°0.2880.3120.2930.315T = 40°0.2840.3120.2870.313T = 45°0.2800.3140.2800.311T = 50°0.2780.3170.2740.311T = 55°0.2750.3190.2680.310T = 60°0.2730.3220.2640.312

Referring to Table 1 andFIG.7, in the case of the embodiment (=Experimental Example 1) described with reference toFIG.5, the color coordinates move to the top left as the visible angle of the display device increases (the more seen from the lateral side). This indicates a region expressing green, and the image becomes greenish when seen from the lateral side in the display device according to an embodiment described with reference toFIG.5.

Referring toFIG.6andFIG.7, in the case of the embodiment (=Experimental Example 2) described with reference toFIG.6, the color coordinates move to the left as the visible angle of the display device increases (as the display is viewed more from the lateral side). For example, the image becomes bluish when seen from the lateral side in the display device according to an embodiment described with reference toFIG.6.

As described above, the color sense seen from the lateral side of the display device (Experimental Example 2) including no polarization layer is different from the color sense seen from the lateral side of the display device (Experimental Example 1) including a polarization layer. A user experiences the color sense seen from the lateral side of the display device (Experimental Example 1) including a polarization layer, and the user prefers the greenish color to the bluish color, so the color sense seen from the lateral side of the display device including no polarization layer may be made to be greenish in a similar way to the color sense seen from the lateral side of the display device including a polarization layer.

The display device, as shown inFIG.1, satisfies “the width (H3) of the third light blocking member≥the width (H2) of the second light blocking member≥the width (H1) of the first light blocking member,” satisfies “the distance (Wg) between the one edge of the partition wall350contacting the second emission layer (green) and the light blocking member≥the distance (Wr) between the one edge of the partition wall350contacting the first emission layer (red) and the light blocking member≥the distance (Wb) between the one edge of the partition wall350contacting the third emission layer (blue) and the light blocking member,” or satisfies “the width (H3) of the third light blocking member≥the width (H2) of the second light blocking member≥the width (H1) of the first light blocking member” and simultaneously satisfies “the distance (Wg) between the one edge of the partition wall350contacting the second emission layer (green) and the light blocking member≥the distance (Wr) between the one edge of the partition wall350contacting the first emission layer (red) and the light blocking member≥the distance (Wb) between the one edge of the partition wall350of the third emission layer (blue) and the light blocking member” so that the color sense seen from the lateral side of the display device including no polarization layer may be similar to the color sense seen from the lateral side of the display device including a polarization layer.

FIG.8shows a detailed cross-sectional view of a display device according to an embodiment ofFIG.2.

Referring toFIG.8, the display device includes a substrate110, and a transistor (TR) positioned on the substrate110. Although briefly illustrated, the transistor (TR) may include a gate electrode, a semiconductor layer, a source electrode, and a drain electrode.

A first electrode191is connected to the transistor (TR). An insulating layer180is positioned between the first electrode191and the transistor (TR). A partition wall350is positioned on the insulating layer180. The partition wall350may include a black material and may have a light blocking function. The partition wall350may have an opening355overlapping the first electrode191. A second emission layer360G is positioned in the opening355.FIG.8mainly shows the second emission layer360G of the display device shown inFIG.2. A spacer370may be positioned in a predetermined region of the partition wall350. The spacer370may include a same material as the partition wall350and may be integrally formed with the partition wall350, or it may include a material that is different from the partition wall350.

A second electrode270is positioned on the second emission layer360G. The second electrode270may be positioned on the partition wall350and the spacer370.

A capping layer380may be positioned on the second electrode270. The capping layer380may be an inorganic film and may be formed by a CVD process. The capping layer380may be omitted depending on embodiments. An encapsulation layer390may be positioned on the capping layer380. The encapsulation layer390may have a structure in which organic films and inorganic films are alternately formed. Alternatively, the encapsulation layer390may include an organic material.

An intermediate layer381may be positioned on the encapsulation layer390. The intermediate layer381may be an inorganic film and may be formed by the CVD process. The intermediate layer381may be omitted depending on embodiments.

A touch sensing layer800is positioned on the intermediate layer381. The touch sensing layer800may include sensing electrodes TA1 and TA2 and a touch insulating layer810. The touch sensing layer800is integrally included in the display device according to the present embodiment. The touch sensing layer800may be omitted depending on embodiments.

A light blocking member220is positioned on the touch sensing layer800. Descriptions on the light blocking member220correspond to what is described with reference toFIG.2. To the extent that a detailed description of a particular element has been omitted, it may be assumed that the element is at least similar to corresponding elements that have been disclosed elsewhere within the instant specification.FIG.8shows a first light blocking member220_RG and a second light blocking member220_GB.

A second color filter230G is positioned between the first light blocking member220_RG and the second light blocking member220_GB. A first color filter230R may be positioned between the second color filter230G and the first light blocking member220_RG, and a third color filter230B may be positioned between the second color filter230G and the second light blocking member220_GB. As described above, the first color filter230R may be a red color filter, the second color filter230G may be a green color filter, and the third color filter230B may be a blue color filter.

Referring toFIG.8, a planarization layer850is positioned on the color filter230. The planarization layer850may planarize an upper side of the color filter230. A window900may be positioned on the planarization layer850.

FIG.9shows an enlarged portion marked with A inFIG.8. A configuration for adjusting the distance between the emission layer360and the light blocking member220will now be described with reference toFIG.9. For example, when the width of the first light blocking member220_RG is reduced in a direction marked with an arrow of L, the distance (Wg) between the emission layer360G and the first light blocking member220_RG is increased. On the contrary, when the width of the first light blocking member220_RG is increased in a direction marked with an arrow of R, the distance (Wg) between the emission layer360G and the first light blocking member220_RG is reduced.

When the portions drawn above the arrow of L and the arrow of R shown inFIG.9are compared, it is found that Wg increases when the first light blocking member220_RG moves in the direction of the arrow of L, and Wg decreases when the first light blocking member220_RG moves in the direction of the arrow of R.

FIG.10shows luminance with respect to viewing angles measured while varying a distance (Wb) between a blue emission layer360B and a light blocking member220. Referring toFIG.10, it is found that a ratio of luminance is reduced when the distance (Wb) between the blue emission layer360B and the light blocking member220is reduced by 2 μm further than the reference value (4.5 μm) (Experimental Example 3). It is also found that, when the distance between the blue emission layer360B and the light blocking member220is increased by 1 μm further than the reference value (4.5 μm) (Experimental Example 4), it has the same ratio of luminance as the reference value (Ref) and the ratio of luminance is not increased or reduced any longer.

When the drawing shown inFIG.10is compared, it is found that Wb is reduced when the width of the light blocking member220increases (shown below the curves in the drawing), and Wb is increased when the width of the light blocking member220is reduced (shown above the curves in the drawing).

The luminance with respect to the viewing angle is measured while increasing (+1 μm) and reducing (−1 μm and −2 μm) the distance between the emission layer and the light blocking member from Ref (4.5 μm) for the red emission layer360R, the green emission layer360G, and the blue emission layer360B according to the same method as what is described with reference toFIG.10. Results are expressed in Table 2.

TABLE 2ViewingRedGreenBlueangle+1 μmRef−1 μm−2 μm+1 μmRef−1 μm−2 μm+1 μmRef−1 μm−2 μm(°)122%100%77%55%122%100%77%55%122%100%77%55%0100%100%100%100%100%100%100%100%100%100%100%100%5100%100%100%100%100%100%100%100%100%100%100%100%10100%100%100%100%100%100%100%100%100%100%100%100%15100%100%100%100%100%100%100%100%100%100%100%100%20100%100%100%100%100%100%100%100%100%100%100%100%25100%100%100%98%100%100%100%9%100%100%100%98%30100%100%100%96%100%100%100%96%100%100%100%96%35100%100%100%94%100%100%100%94%100%100%100%94%40100%100%98%92%100%100%98%92%100%100%98%93%45100%100%96%90%100%100%96%90%100%100%96%91%50100%99%94%88%100%99%94%88%100%99%94%89%55100%97%92%87%100%97%92%86%100%98%92%87%60100%96%90%85%100%96%90%84%100%96%91%86%

Referring to Table 2, it is found that the luminance increases with respect to Ref when the distances between the respective emission layers360R,360G, and360B and the light blocking member are increased, and the luminance reduces with respect to Ref when the distances between the respective emission layers360R,360G, and360B and the light blocking member are reduced.

The movement of the color coordinates with respect to the viewing angle by increasing or reducing the distance between the emission layer and the light blocking member for the respective emission layers is shown inFIG.11toFIG.13.

FIG.11shows results on a red emission layer360R,FIG.12shows results on a green emission layer360G, andFIG.13shows results on a blue emission layer360B.

FIG.11shows results on the red emission layer360R. Referring toFIG.11, it is found that the movement of the color coordinates of the red emission layer with respect to the viewing angle is not big when the distance (Wr) between the emission layer and the light blocking member is increased or reduced.

FIG.12shows results on the green emission layer360G. Referring toFIG.12, it is found that the color coordinates of the green emission layer with respect to the viewing angle moves to the top left when the distance between the emission layer and the light blocking member is increased (+1 μm). For example, it is found that the color sense seen from the lateral side becomes greenish when the distance between the green emission layer and the light blocking member is increased. It is also found that the color coordinates of the green emission layer with respect to the viewing angle moves to the bottom right when the distance between the emission layer and the light blocking member is reduced (−1 μm and −2 μm).

FIG.13shows results on the blue emission layer360B. Referring toFIG.13, it is found that the color coordinates of the blue emission layer with respect to the viewing angle moves to the bottom left when the distance between the emission layer and the light blocking member is increased (+1 μm). It is also found that the color coordinates of the blue emission layer with respect to the viewing angle moves to the top right when the distance between the emission layer and the light blocking member is reduced (−1 μm and −2 μm). Therefore, it is found that the color sense seen from the lateral side of the blue emission layer becomes greenish when the distance between the emission layer and the light blocking member is reduced (−1 μm and −2 μm).

FIG.14shows a summary of results obtained fromFIG.11toFIG.13. Referring toFIG.14, the movement of the color coordinates when the distance between the emission layer and the light blocking member is increased is shown with dotted lines, and the movement of the color coordinates when the distance between the emission layer and the light blocking member is reduced is shown with solid lines.

Referring toFIG.14, in the case of the red emission layer, it is found that the color coordinates move to the right when the distance with the light blocking member increases, and the color coordinates move to the left when the distance is reduced. The movement in the upward or downward direction is not noticeable.

In the case of the green emission layer, it is found that the color coordinates move to the top left when the distance with the light blocking member increases, and the color coordinates move to the bottom right when the distance reduces. Therefore, it is found that the distance between the green emission layer and the light blocking member is to be increased so as to express the greenish color when seen from the lateral side.

In the case of the blue emission layer, it is found that the color coordinates move to the bottom left when the distance with the light blocking member increases, and the color coordinates move to the top right when the distance with the light blocking member reduces. Hence, it is found that the distance between the blue emission layer and the light blocking member is to be reduced so as to express the greenish color when seen from the lateral side.

As shown inFIG.2, the display device increases the distance (Wg) between the green emission layer (second emission layer,360G) and the light blocking member, and reduces the distance (Wb) between the blue emission layer (third emission layer,360B) and the light blocking member.

FIG.15shows color coordinates with respect to viewing angles, regarding a display device in which a distance (Wr) between a red emission layer (first emission layer,360R) and a light blocking member is set to be a reference (=4.5 μm), the distance (Wg) between the green emission layer (second emission layer,360G) and the light blocking member is increased by 1 μm compared to the reference, and the distance (Wb) between the blue emission layer (third emission layer,360B) and the light blocking member is decreased by 1 μm compared to the reference. Referring toFIG.15, it is found that the color coordinates of the display device (Experimental Example 1) including a polarization layer are substantially similar to the color coordinates of the display device (embodiment 1) in which the distance (Wg) between the green emission layer (second emission layer,360G) and the light blocking member are increased by 1 μm further compared to the reference according to the present embodiment, and the distance (Wb) between the blue emission layer (third emission layer,360B) and the light blocking member is reduced by 1 μm. Particularly, as the viewing angle becomes higher, trajectories of the color coordinates become similar to each other, so it is found that they have similar color senses when seen from the lateral side.

When the changes of Wr, Wg, and Wh ofFIG.15are changed according to a relative ratio, and Wr is set to be 100%, Wg corresponds to about 122%, and Wb corresponds to about 77%. Therefore, it is found that they have similar color senses when seen from the lateral side when Wg and Wb are in the range of 25% with reference to Wr. For example, when a length of Wr is not 4.5 μm and has other values, and Wg and Wb are changed with the value of ±25% with reference to Wr, it may have a similar effect to the case ofFIG.15.

FIG.16shows results (Experimental Example 2) of measuring color coordinates with respect to viewing angles, and regarding an embodiment described with reference toFIG.6in which distances between an emission layer and a light blocking member are the same for respective pixels. WhenFIG.6and the Embodiment 1 ofFIG.15are compared, it is found that the color coordinates with respect to the viewing angle move to the top right according to an adjustment of the distance between the emission layer and the light blocking member. Therefore, it is found that Embodiment 1 has the greenish color when seen from the lateral side, compared to Experimental Example 2.

An embodiment of the present invention will now be described. Referring toFIG.2, the distances between the light blocking member and the respective green emission layer and the blue emission layer are increased or reduced compared to the reference value (=Wr, the distance between the red emission layer and the light blocking member), and the similar effect may be obtained when one of the two is changed.

FIG.17shows a same region as that shown inFIG.2in a display device according to an embodiment of the present disclosure. Referring toFIG.17, the distance (Wg) between the second emission layer360G and the light blocking members220_RG and220_GB is greater than the distance (Wr) between the first emission layer360R and the light blocking members220_BR and220_RG. Referring toFIG.17in comparison toFIG.2, the distance (Wb) between the third emission layer360B and the light blocking members220_GB and220_BR is not changed but remains the same with respect to the reference value (Wr). For example, the relationship of Wr=Wb<Wg is satisfied.

For example, the distance (Wg) between the green emission layer and the light blocking member is changed, and the distance (Wb) between the blue emission layer and the light blocking member is not changed in comparison to the reference value (Wg), and other remaining parts correspond to the embodiment described with reference toFIG.2. To the extent that a detailed description of a particular element has been omitted, it may be assumed that the element is at least similar to corresponding elements that have been disclosed elsewhere within the instant specification. As shown inFIG.14, the color coordinates move to the top left because of the increase of the distance between the green emission layer and the light blocking member, so the same effects may be obtained in the case of what is described with reference toFIG.17. For example, when seen from the lateral side, it may have the greenish color in a like manner of the display device including a polarization layer.

FIG.18shows a same region as that shown inFIG.2in a display device according to an embodiment. Referring toFIG.18, the distance (Wb) between the third emission layer360B and the light blocking members220_GB and220_BR is less than the distance (Wr) between the first emission layer360R and the light blocking members220_BR and220_RG. Referring toFIG.18in comparison toFIG.2, the distance (Wg) between the second emission layer360G and the light blocking members220_RG and220_GB is not changed but remains the same with respect to the reference value (Wr). For example, the relationship of Wb<Wr=Wg is satisfied.

For example, the distance between the blue emission layer and the light blocking member is changed, and the distance between the green emission layer and the light blocking member is not changed in comparison to the reference value, and other remaining parts correspond to the embodiment described with reference toFIG.1. To the extent that a detailed description of a particular element has been omitted, it may be assumed that the element is at least similar to corresponding elements that have been disclosed elsewhere within the instant specification. As shown inFIG.14, the color coordinates move upward because of the reduction of the distance between the blue emission layer and the light blocking member, so the same effects may be obtained in the case of what is described with reference toFIG.18. For example, when seen from the lateral side, it may have the greenish color in a like manner of the display device including a polarization layer.

While this invention has been described in connection with what is presently considered to be practical example embodiments, it is to be understood that the invention is not necessarily limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the present disclosure.