TWI685702B - Display apparatus - Google Patents

Abstract

A display apparatus having a plurality of pixel regions is provided. Each pixel region includes a central pixel region and an outlying pixel region surrounding the central pixel region. The display apparatus includes a substrate, a plurality of light-emitting structures and a plurality of color filter patterns. The light-emitting structures are disposed on the substrate and respectively disposed in the pixel regions. The color filter patterns are disposed corresponding to the light-emitting structures. The color filter patterns include a first color filter pattern and a second color filter pattern. The transmittance of the first color filter pattern in the central pixel region is smaller than the transmittance of the first color filter pattern in the outlying pixel region. The transmittance of the second color filter pattern in the central pixel region is larger than the transmittance of the second color filter pattern in the outlying pixel region.

Description

Display device

The present invention relates to a display device, and particularly to a self-luminous display device.

In recent years, organic light-emitting diode (Organic light-emitting diode, OLED) display panels have gradually attracted various technologies due to their high color saturation, fast response, and high contrast performance compared to current mainstream liquid crystal display panels. The investment vision of big factories. However, under the circumstances that its manufacturing cost is high and its service life cannot compete with current mainstream displays, even if the OLED display panel has the above-mentioned excellent display quality, the market share on the consumer side cannot be significantly improved.

In order to seek a lower-cost manufacturing method, the development of production equipment and related materials is one of the efforts of many manufacturers. Among them, the use of inkjet coating (Ikjet printing, IJP) to form a luminescent material layer on the substrate is currently One of the key technologies. However, the luminescent material layer formed by inkjet coating has different film thicknesses at different positions in each pixel area due to the difference in topography, so that the light emitted from the center and edge of each pixel area has The obvious color difference causes the overall color gamut of the display panel to decrease. Therefore, how to overcome the above-mentioned technical bottlenecks is an issue that the technology plant is desperately trying to solve.

The invention provides a display device with good color performance.

The display device of the present invention has multiple pixel areas, and each pixel area includes a central pixel area and an edge pixel area located around the central pixel area. The display device includes a substrate, a plurality of light emitting structures, and a plurality of color filter patterns. A plurality of light-emitting structures are arranged on the substrate and are respectively located in a plurality of pixel areas. The multiple color filter patterns are corresponding to the multiple light emitting structures. The plurality of color filter patterns includes a first color filter pattern and a second color filter pattern. The light transmittance of the first color filter pattern in the central pixel area is smaller than that of the first color filter pattern in the edge pixel area, and the light transmittance of the second color filter pattern in the center pixel area The rate is greater than the light transmittance of the second color filter pattern in the edge pixel area.

In an embodiment of the invention, each light-emitting structure of the above display device includes a light-emitting material layer. The luminescent material layer has a first thickness and a second thickness in the central pixel area and the edge pixel area, respectively, and the second thickness is greater than the first thickness.

In an embodiment of the invention, the first color filter pattern of the display device has a first thickness and a second thickness in the center pixel area and the edge pixel area, respectively, and the first thickness is greater than the second thickness. The second color filter pattern has a third thickness and a fourth thickness in the center pixel area and the edge pixel area, respectively, and the third thickness is less than the fourth thickness.

In an embodiment of the invention, the edge pixel area of each pixel area of the display device includes an inner edge pixel area and an outer edge pixel area. The inner edge pixel area is located between the outer edge pixel area and the central pixel area. The light transmittance of the first color filter pattern in the inner edge pixel area is greater than the light transmittance of the first color filter pattern in the outer edge pixel area. The light transmittance of the second color filter pattern in the inner edge pixel area is smaller than the light transmittance of the second color filter pattern in the outer edge pixel area.

In an embodiment of the present invention, the thickness of the first color filter pattern of the above-mentioned display device is thinned from the center pixel area to the outer edge pixel area, and the thickness of the second color filter pattern is from the center pixel area The pixel area on the outer edge is thickened.

In an embodiment of the invention, the plurality of light-emitting structures of the above display device include a first light-emitting structure and a second light-emitting structure. The first color filter pattern and the second color filter pattern overlap the first light emitting structure and the second light emitting structure, respectively. The first light emitting structure and the first color filter pattern are used to display red. The second light emitting structure and the second color filter pattern are used to display blue or green.

In an embodiment of the present invention, the difference in light transmittance between the center pixel area and the edge pixel area of the first color filter pattern of the display device is between 15% and 30%.

In an embodiment of the invention, the difference in light transmittance between the center pixel area and the edge pixel area of the second color filter pattern of the above-mentioned display device is between 20% and 50%.

In an embodiment of the invention, the first color filter pattern of the above display device includes a first blend, and the concentration of the first blend in the central pixel area of the first color filter pattern is greater than the first The concentration of the first blend of color filter patterns in the edge pixel area. The second color filter pattern includes a second blend, and the concentration of the second blend of the second color filter pattern in the central pixel area is less than the second blend of the second color filter pattern in the edge pixel area The concentration of the substance.

In an embodiment of the invention, the materials of the first blend and the second blend of the display device include dyes, pigments, or a combination of the above materials.

In an embodiment of the invention, each color filter pattern of the above-mentioned display device has a stepped surface facing the substrate.

In an embodiment of the invention, each color filter pattern of the above-mentioned display device has a sloped surface facing the substrate.

In an embodiment of the invention, each color filter pattern of the above-mentioned display device has an arc-shaped surface facing the substrate.

In an embodiment of the invention, the vertical projection of the edge of the central pixel area and the edge of the edge pixel area on the substrate of each pixel area of the display device in the first direction and perpendicular to the first side respectively Upwards are separated by a first distance and a second distance, and the first distance is greater than the second distance.

Based on the above, in the display device of the embodiment of the present invention, the color filter pattern has different light transmittances in the central pixel area and the edge pixel area, so that the corresponding light emitting structure is in the central pixel area and the edge The two light rays respectively generated in the pixel area have similar chromaticity after passing through the color filter pattern, so as to improve the uniformity of light output in the pixel area, thereby improving the color performance of the display device.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

As used herein, "about", "approximately", "essentially", or "substantially" includes the stated value and the average value within the acceptable deviation range of the specific value determined by those of ordinary skill in the art, considering The measurement in question and the specific number of errors associated with the measurement (ie, the limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or for example within ±30%, ±20%, ±15%, ±10%, ±5%. Furthermore, the terms "approximately", "approximately", "essentially", or "substantially" as used herein can select a more acceptable range of deviation or standard deviation according to measurement properties, cutting properties, or other properties. All properties are applied without a standard deviation.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected" to another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to physical and/or electrical connections. Furthermore, "electrical connection" may be that there are other components between the two components.

Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element symbols are used in the drawings and description to denote the same or similar parts.

FIG. 1 is a schematic top view of a display device 10 according to a first embodiment of the invention. FIG. 2 is a schematic cross-sectional view of the display device 10 in FIG. 1. Fig. 2 corresponds to the section line A-A' in Fig. 1. It should be noted that, for the sake of clarity, FIG. 1 only shows the substrate 100 and the color filter pattern 310 in FIG. 2.

1 and 2, the display device 10 includes a substrate 100 and an isolation structure 150. In detail, the display device 10 has a plurality of pixel regions PR arranged in an array, and each pixel region PR includes a central pixel region CR and an edge pixel region ER located around the central pixel region CR. The isolation structure 150 is disposed between any two adjacent pixel regions PR. More specifically, the isolation structure 150 may define a plurality of pixel regions PR of the display device 10. In this embodiment, the substrate 100 may include a driving circuit layer (eg, data lines, scanning lines, peripheral traces), and driving elements (eg, thin film transistors, capacitors), but the invention is not limited thereto. In some embodiments, the material of the isolation structure 150 may be a hydrophobic material, such as a fluorine-rich negative photoresist material.

The vertical projections of the edge of the central pixel area CR and the edge of the edge pixel area ER on the substrate 100 of each pixel area PR are separated by a first distance L1 and a second distance L2 in the direction D1 and perpendicular to the direction D1, And the first distance L1 is greater than the second distance L2. However, the present invention is not limited to this. According to other embodiments, the first distance L1 and the second distance L2 may be substantially equal, or the first distance L1 may be smaller than the second distance L2.

In this embodiment, the edge pixel area ER may include an inner edge pixel area ER1 and an outer edge pixel area ER2, and the inner edge pixel area ER1 is located between the outer edge pixel area ER2 and the central pixel area CR. The so-called inner and outer edge pixel areas in this article can be understood as the part of the edge pixel area ER that is relatively close to the central pixel area CR is named the inner edge pixel area ER1, and is relatively far from the center pixel area The part of CR is named the outer edge pixel area ER2. However, the present invention is not limited to this. According to other embodiments, the number of inner edge pixel regions ER1 and outer edge pixel regions ER2 of the substrate 100 may be determined according to actual needs.

As shown in FIG. 2, the display device 10 further includes a plurality of light-emitting structures 200 respectively disposed on the substrate 100 and located in the plurality of pixel regions PR. Each light emitting structure 200 includes a light emitting material layer 210, and the light emitting material layer 210 has a first thickness T1 and a second thickness T2 in the central pixel region CR and the inner edge pixel region ER1, respectively, and the second thickness T2 is greater than the first thickness T1. For example, in this embodiment, the luminescent material layer 210 also has a third thickness T3 in the outer edge pixel area ER2, and the third thickness T3 is greater than the second thickness T2, that is, the thickness of the luminescent material layer 210 is determined by The central pixel area CR thickens toward the outer edge pixel area ER2, but the invention is not limited to this.

It should be noted that in this embodiment, the first thickness T1, the second thickness T2, and the third thickness T3 are respectively composed of the luminescent material layer 210 in the central pixel area CR, the inner edge pixel area ER1, and the outer edge pixel area Defined by the thickness at the center of ER2. However, the present invention does not limit the definition of the first thickness T1, the second thickness T2, and the third thickness T3. In other embodiments, the first thickness T1, the second thickness T2, and the third thickness T3 can also be defined by The luminescent material layer 210 is defined by the average thickness of the central pixel region CR, the inner edge pixel region ER1, and the outer edge pixel region ER2.

The plurality of light emitting structures 200 may include a first light emitting structure 201 and a second light emitting structure 202. In this embodiment, the light-emitting material layer 210 of the first light-emitting structure 201 is, for example, a material layer that can emit red light, and the light-emitting material layer 210 of the second light-emitting structure 202 is, for example, a material layer that can emit green light, but the present invention does not This is the limit. According to other embodiments, the light emitting material layer 210 of the second light emitting structure 202 may also be a material layer capable of emitting blue light.

Following the above, the light emitting material layer 210 may include a hole injection layer HIL, a hole transport layer HTL, a light emitting layer EML, and an electron transport layer ETL stacked in sequence, but the invention is not limited thereto. In this embodiment, the hole injection layer HIL, the hole transport layer HTL, the light emitting layer EML, and the electron transport layer ETL can be input by any hole used in a display device well known to those skilled in the art. Layer, any hole transport layer, any light-emitting layer, and any electron transport layer, and the hole injection layer HIL, hole transport layer HTL, light-emitting layer EML, and electron transport layer ETL can be implemented by any of their respective technologies It is formed by any method well known to those with ordinary knowledge in the field.

Each light emitting structure 200 further includes a first electrode 220 and a second electrode 230, and the first electrode 220, the light emitting material layer 210, and the second electrode 230 are sequentially stacked on the substrate 100. For example, in this embodiment, the plurality of second electrodes 230 of the plurality of light emitting structures 200 may be electrically connected to each other, and are composed of a conductive layer that continuously covers the isolation structure 150 and the pixel region PR, but the present invention Not limited to this. In other embodiments, the plurality of second electrodes 230 of the plurality of light emitting structures 200 may also be structurally separated from each other.

In this embodiment, the first electrode 220 and the second electrode 230 are, for example, light transmissive electrodes, and the materials of the light transmissive electrodes include metal oxides, such as indium tin oxide, indium zinc oxide, aluminum tin Oxide, aluminum zinc oxide, or other suitable oxide, or a stack of at least two of the above. However, the present invention is not limited to this. In other embodiments, the first electrode 220 may also be a reflective electrode, and the materials of the reflective electrode include alloys, nitrides of metal materials, oxides of metal materials, and nitrogen of metal materials. Oxide, or other suitable materials, or a stack of metal materials and other conductive materials.

The display device 10 further includes a color filter layer 300 disposed on the plurality of light emitting structures 200. The color filter layer 300 includes a plurality of color filter patterns 310, which are respectively disposed corresponding to the plurality of light emitting structures 200. In this embodiment, the plurality of color filter patterns 310 include a first color filter pattern 311 and a second color filter pattern 312, and the first color filter pattern 311 and the second color filter pattern 312 overlap the first A light emitting structure 201 and a second light emitting structure 202. Specifically, the vertical projection of the first light emitting structure 201 on the substrate 100 is located within the vertical projection of the first color filter pattern 311 on the substrate 100, and the vertical projection of the second light emitting structure 202 on the substrate 100 is located in the second color filter The light pattern 312 is within the vertical projection on the substrate 100.

Please refer to FIG. 1 at the same time. For example, in this embodiment, each pixel region PR has a first width W1 perpendicular to the direction D1, and each color filter pattern 310 has a second width perpendicular to the direction D1. The width W2, and the ratio of the first width W1 to the second width W2 is between 1 and 1.2. That is to say, the portion of each color filter pattern 310 outside the pixel area PR may overlap the isolation structure 150, but the invention is not limited thereto.

In particular, in this embodiment, the first color filter pattern 311 is, for example, a red filter pattern, and the second color filter pattern 312 is, for example, a green filter pattern. That is, the first light emitting structure 201 and the first color filter pattern 311 can be used to display red, and the second light emitting structure 202 and the second color filter pattern 312 can be used to display green. However, the present invention is not limited to this. According to other embodiments, the light emitting material layer 210 of the second light emitting structure 202 is, for example, a material layer capable of emitting blue light, and the second color filter pattern 312 may be a blue filter pattern, that is, In other words, the second light emitting structure 202 and the second color filter pattern 312 can be used to display blue.

In this embodiment, the light transmittance of the first color filter pattern 311 in the central pixel region CR is smaller than the light transmittance of the first color filter pattern 311 in the edge pixel region ER, and the second color filter The light transmittance of the pattern 312 in the central pixel area CR is greater than the light transmittance of the second color filter pattern 312 in the edge pixel area ER. In some embodiments, the difference between the light transmittance of the first color filter pattern 311 (such as the red filter pattern) in the central pixel area CR and the edge pixel area ER may be between 15% and 30%. In other embodiments, the difference in light transmittance between the central pixel region CR and the edge pixel region ER of the second color filter pattern 312 (such as the blue filter pattern) may be between 20% and 40% between. In still other embodiments, the difference in light transmittance between the central pixel region CR and the edge pixel region ER of the second color filter pattern 312 (eg, green filter pattern) may be between 30% and 50% .

It is worth mentioning that during the inkjet coating process of the luminescent material layer 210 of each luminous structure 200, the edge pixel area ER will accumulate more material, so that the film-formed luminescent material layer 210 is at the edge pixel The thickness of the region ER (eg, the second thickness T2 and the third thickness T3) is greater than the thickness of the central pixel region CR (eg, the first thickness T1), resulting in the luminescent material layer 210 in the edge pixel region ER and the central pixel region, respectively There is a color difference between the two rays emitted by CR. Therefore, the color filter pattern 310 has different light transmittances in the central pixel area CR and the edge pixel area ER, so that the chromaticity of the two light rays after passing through the color filter pattern 310 is similar to improve the pixel The light uniformity of the zone.

2, in this embodiment, the light transmittance of the first color filter pattern 311 in the inner edge pixel area ER1 may be smaller than the light transmittance of the first color filter pattern 311 in the outer edge pixel area ER2 And the light transmittance of the second color filter pattern 312 in the inner edge pixel area ER1 may be greater than the light transmittance of the second color filter pattern 312 in the outer edge pixel area ER2, but the invention is not limited to this . That is to say, the light transmittance of the first color filter pattern 311 increases from the central pixel area CR to the outer edge pixel area ER2, and the light transmittance of the second color filter pattern 312 is from the center pixel area CR decreases to the outer edge pixel area ER2.

From another point of view, the first color filter pattern 311 has a center thickness CT1, an inner edge thickness ET1, and an outer edge thickness ET2 in the center pixel region CR, the inner edge pixel region ER1, and the outer edge pixel region ER2, respectively. And the center thickness CT1 is greater than the inner edge thickness ET1, and the inner edge thickness ET1 is greater than the outer edge thickness ET2. The second color filter pattern 312 has a center thickness CT2, an inner edge thickness ET3, and an outer edge thickness ET4 in the central pixel area CR, the inner edge pixel area ER1, and the outer edge pixel area ER2, respectively, and the center thickness CT2 is less than the inner edge The thickness ET3, the inner edge thickness ET3 is smaller than the outer edge thickness ET4.

That is, the thickness of the first color filter pattern 311 is thinned from the central pixel region CR to the outer edge pixel region ER2, and the thickness of the second color filter pattern 312 is from the central pixel region CR to the outer edge pixel region ER2 thickens. For example, in this embodiment, the color filter pattern 310 has a stepped surface facing the substrate 100, but the invention is not limited thereto. More specifically, the thickness of the first color filter pattern 311 is thinned stepwise from the central pixel region CR to the outer edge pixel region ER2, and the thickness of the second color filter pattern 312 is outward from the central pixel region CR The edge pixel area ER2 is thickened stepwise, that is to say, the first color filter pattern 311 and the second color filter pattern 312 respectively have a stepped convex surface 311s and a stepped concave surface 312s toward the substrate 100. The so-called convex surface can be understood that the surface of the color filter pattern 310 facing the substrate 100 is closer to the substrate 100 at the center and the edge portion is farther away from the substrate, and the so-called concave surface can be understood as the surface of the color filter pattern 310 facing the substrate 100 at the center. Farther from the substrate and the edge portion is closer to the substrate.

It is worth mentioning that, in this embodiment, the color filter pattern 310 is transmitted through the center pixel area CR and the edge pixel area ER having different thicknesses, so that the color filter pattern 310 is located in the center pixel area CR and The edge pixel regions ER have different light transmittances. In this embodiment, the material of the color filter pattern 310 may include diffusion particles, light conversion materials, pigments, dyes, or a combination thereof.

The color filter layer 300 may further include a light-shielding pattern BM disposed between any two adjacent color filter patterns 310, and the light-shielding pattern BM overlaps the isolation structure 150. In detail, the vertical projection of the light-shielding pattern BM on the substrate 100 is within the vertical projection of the isolation structure 150 on the substrate 100, that is, the gap between the pixel regions PR. The display device 10 may further include a filling layer 400 disposed between the plurality of light emitting structures 200 and the color filter layer 300, but the invention is not limited thereto. In this embodiment, the material of the filling layer 400 may include silicon nitride, aluminum oxide, aluminum oxycarbide, silicon oxynitride, acrylic resin, hexamethyldisiloxane (HMDSO), or glass. In addition, although not shown in FIG. 2, in some embodiments, the display device 10 may further include another substrate, and the color filter layer 300 is disposed on the other substrate, and the light emitting structure 200 and the color filter The layers 300 are all interposed between the substrate 100 and the other substrate.

3 is a schematic cross-sectional view of a display device 10A according to a second embodiment of the invention. Referring to FIG. 3, the difference between the display device 10A of this embodiment and the display device 10 of FIG. 2 is that the color filter pattern 310A of the display device 10A has a sloped surface toward the substrate 100. Specifically, the first color filter pattern 311A and the second color filter pattern 312A respectively have a slope-shaped convex surface 311As and a slope-shaped concave surface 312As facing the substrate 100.

4 is a schematic cross-sectional view of a display device 10B according to a third embodiment of the invention. Referring to FIG. 4, the difference between the display device 10B of this embodiment and the display device 10 in FIG. 2 is that the color filter pattern 310B of the display device 10B has an arc-shaped surface facing the substrate 100. Specifically, the first color filter pattern 311B and the second color filter pattern 312B respectively have an arc-shaped convex surface 311Bs and an arc-shaped concave surface 312Bs facing the substrate 100.

5 is a schematic cross-sectional view of a display device 20 according to a fourth embodiment of the invention. Referring to FIG. 5, the difference between the display device 20 of this embodiment and the display device 10 in FIG. 2 is that the center thickness CT1 (or center thickness CT2) of the color filter pattern 310C of the display device 20 and the inner edge thickness ET1 (or The inner edge thickness ET3) and the outer edge thickness ET2 (or outer edge thickness ET4) are substantially the same, and the color filter pattern 310C includes the blend AD in different concentrations in the central pixel region CR and the edge pixel region ER, respectively.

In detail, in this embodiment, the concentration of the blend AD1 of the first color filter pattern 311C in the central pixel region CR is greater than that of the blend AD1 of the first color filter pattern 311C in the edge pixel region ER In concentration, the concentration of the admixture AD2 of the second color filter pattern 312C in the central pixel region CR is less than the concentration of the admixture AD2 of the second color filter pattern 312C in the edge pixel region ER.

In addition, the concentration of the admixture AD1 of the first color filter pattern 311C in the inner edge pixel area ER1 is greater than the concentration of the admixture AD1 of the first color filter pattern 311C in the outer edge pixel area ER2, and the second color filter The concentration of the blend AD2 of the pattern 312C in the inner edge pixel area ER1 is less than the concentration of the blend AD2 of the second color filter pattern 312C in the outer edge pixel area ER2. That is, the concentration of the blend AD1 of the first color filter pattern 311C decreases from the central pixel region CR to the outer edge pixel region ER2, and the concentration of the blend AD2 of the second color filter pattern 312C is drawn by the center The pixel area CR increases toward the outer edge pixel area ER2.

It is worth mentioning that, in this embodiment, the color filter pattern 310C is made by blending AD with different concentrations in the central pixel area CR and the edge pixel area ER, respectively, so that the color filter pattern 310C is drawn in the center The pixel area CR and the edge pixel area ER have different light transmittances, respectively. In this embodiment, the material of the blend AD includes dyes, pigments, or a combination of the above materials.

In summary, in the display device of the embodiment of the present invention, the color filter pattern has different light transmittances in the central pixel area and the edge pixel area, so that the corresponding light emitting structure is in the central pixel area The two light rays generated by the edge pixel area are similar in chromaticity after passing through the color filter pattern, so as to improve the light uniformity of the pixel area, thereby improving the color gamut performance of the display device.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

10. 10A~10C, 20: Display device 100: Substrate 150: Isolation structure 200, 201, 202: Light emitting structure 210: Light emitting material layer 220: First electrode 230: Second electrode 300: Color filter layer 310, 310A~ 310C: Color filter patterns 311, 311A to 311C: First color filter pattern 311s: Stepped convex surface 311As: Sloping convex surface 311Bs: Curved convex surfaces 312, 312A to 312C: Second color filter pattern 312s: Stepped concave surface 312As: sloped concave surface 312Bs: curved concave surface 400: filling layers AD, AD1, AD2: blend BM: shading pattern CR: central pixel area CT1, CT2: central thickness D1: direction EML: light emitting layer ER: edge painting Element area ER1: Inner edge pixel area ER2: Outer edge pixel area ET1, ET3: Inner edge thickness ET2, ET4: Outer edge thickness ETL: Electron transport layer HIL: Hole injection layer HTL: Hole transport layer L1: No. First distance L2: Second distance PR: Pixel area T1: First thickness T2: Second thickness T3: Third thickness W1: First width W2: Second width A-A': Section line

FIG. 1 is a schematic top view of a display device according to a first embodiment of the invention. FIG. 2 is a schematic cross-sectional view of the display device in FIG. 1. 3 is a schematic cross-sectional view of a display device according to a second embodiment of the invention. 4 is a schematic cross-sectional view of a display device according to a third embodiment of the invention. 5 is a schematic cross-sectional view of a display device according to a fourth embodiment of the invention.

10: Display device 100: Substrate 150: Isolation structure 200, 201, 202: Light emitting structure 210: Light emitting material layer 220: First electrode 230: Second electrode 300: Color filter layer 310, 311, 312: Color filter pattern 311s: stepped convex surface 312s: stepped concave surface 400: filled layer BM: shading pattern CR: central pixel area CT1, CT2: central thickness EML: light emitting layer ER: edge pixel area ER1: inner edge pixel area ER2: outer Edge pixel area ET1, ET3: inner edge thickness ET2, ET4: outer edge thickness ETL: electron transport layer HIL: hole injection layer HTL: hole transport layer PR: pixel area T1: first thickness T2: second thickness T3: Third thickness A-A': Section line

Claims (13)

A display device has a plurality of pixel areas, and each of the pixel areas includes a central pixel area and an edge pixel area located around the central pixel area. The display device includes: a substrate; a plurality of light emitting structures, provided On the substrate and located in the pixel regions; and a plurality of color filter patterns corresponding to the light emitting structures, wherein the color filter patterns include a first color filter pattern and a second A color filter pattern, and the light transmittance of the first color filter pattern in the central pixel area is less than the light transmittance of the first color filter pattern in the edge pixel area, the second color filter The light transmittance of the pattern in the central pixel area is greater than that of the second color filter pattern in the edge pixel area, wherein each of the light-emitting structures includes a light-emitting material layer, and the light-emitting material layer is drawn in the center The pixel area and the edge pixel area have a first thickness and a second thickness, respectively, and the second thickness is greater than the first thickness. The display device according to item 1 of the patent application scope, wherein the first color filter pattern has a first thickness and a second thickness in the center pixel area and the edge pixel area, respectively, and the first thickness Greater than the second thickness, the second color filter pattern has a third thickness and a fourth thickness in the center pixel area and the edge pixel area, respectively, and the third thickness is less than the fourth thickness. The display device as described in item 1 of the patent application scope, wherein the edge pixel area of each pixel area includes an inner edge pixel area and an outer edge pixel area, the inner edge The pixel area is located between the outer edge pixel area and the center pixel area, and the light transmittance of the first color filter pattern in the inner edge pixel area is greater than that of the first color filter pattern in the outer The light transmittance of the edge pixel area, the light transmittance of the second color filter pattern in the inner edge pixel area is smaller than the light transmittance of the second color filter pattern in the outer edge pixel area. The display device according to item 3 of the patent application scope, wherein the thickness of the first color filter pattern is thinned from the center pixel area to the outer edge pixel area, and the thickness of the second color filter pattern is decreased by The central pixel area thickens toward the outer edge pixel area. The display device according to item 1 of the patent application scope, wherein the light-emitting structures include a first light-emitting structure and a second light-emitting structure, and the first color filter pattern and the second color filter pattern are respectively overlapped on the A first light emitting structure and the second light emitting structure, and the first light emitting structure and the first color filter pattern are used to display red, and the second light emitting structure and the second color filter pattern are used to display blue or green . The display device as described in item 1 of the patent application range, wherein the difference in light transmittance of the first color filter pattern between the central pixel area and the edge pixel area is between 15% and 30% . The display device as described in item 1 of the patent application scope, wherein the difference in light transmittance between the central pixel area and the edge pixel area of the second color filter pattern is between 20% and 50% . The display device as described in item 1 of the patent application range, wherein the first color filter pattern includes a first blend, and the first blend of the first color filter pattern in the central pixel area The density is greater than the first color filter pattern at the edge The concentration of the first blend in the pixel area, the second color filter pattern includes a second blend, and the second color filter pattern is in the center pixel area of the second blend The concentration is less than the concentration of the second blend of the second color filter pattern in the edge pixel area. The display device as recited in item 8 of the patent application range, wherein the materials of the first blend and the second blend include dyes, pigments, or a combination of the foregoing materials. The display device as described in item 1 of the patent application range, wherein each of the color filter patterns has a stepped surface facing the substrate. The display device as described in item 1 of the patent application range, wherein each of the color filter patterns has a sloped surface facing the substrate. The display device as described in item 1 of the patent application range, wherein each of the color filter patterns has an arc-shaped surface facing the substrate. The display device as described in item 1 of the patent application scope, wherein the vertical projection of the edge of the central pixel area of each pixel area and the edge of the edge pixel area on the substrate are respectively in a first direction and vertical There is a first distance and a second distance in the first direction, and the first distance is greater than the second distance.

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