TWI766293B - Display panel - Google Patents

Abstract

A display panel including a substrate, an isolation structure layer, a plurality of light emitting devices, a plurality of wavelength conversion patterns and a filter layer. The isolation structure layer is disposed on the substrate and has a plurality of first recesses and a plurality of second recesses arranged alternately. The light emitting devices are respectively disposed in the first recesses. The wavelength conversion patterns are disposed in at least part of the first recesses and cover at least part of the light emitting devices. The filter layer covers the isolation structure layer and fills into the second recesses.

Description

display panel

The present invention relates to a display technology, and in particular, to a display panel.

In recent years, under the circumstance that the manufacturing cost of organic light-emitting diode (OLED) display panels is high and its service life cannot compete with the current mainstream displays, micro light-emitting diode displays (Micro LEDs) Display) has gradually attracted the investment attention of various technology manufacturers. In particular, in addition to optical performance comparable to OLED displays, such as high color saturation, fast response speed, and high contrast, microLED displays also have the advantages of low power consumption and long material life. Therefore, it is expected to become the mainstream display technology of the next generation.

Considering the yield of die transfer and the difficulty of miniaturization of red light emitting diodes, a miniature light emitting diode display using blue light emitting diodes and various wavelength conversion materials is proposed. These wavelength converting materials are used to convert blue light emitted by blue light emitting diodes into red, green or other colors of light. However, when the absorption conversion efficiency of these wavelength conversion materials is insufficient, it is easy to cause the overflow of blue light and the overall color gamut performance of the image.

The present invention provides a display panel with better color performance.

The display panel of the present invention includes a substrate, an isolation structure layer, a plurality of light-emitting elements, a plurality of wavelength conversion patterns and a filter layer. The isolation structure layer is disposed on the substrate and has a plurality of first grooves and a plurality of second grooves which are alternately arranged. A plurality of light emitting elements are respectively disposed in the first grooves. A plurality of wavelength conversion patterns are disposed in at least part of the plurality of first grooves and cover at least part of the plurality of light emitting elements. The filter layer covers the isolation structure layer and fills the second grooves.

In an embodiment of the present invention, the ratio of the transmittance of the filter layer of the display panel at wavelengths of 530 nm and 628 nm to the transmittance of the filter layer at wavelength of 480 nm is greater than or equal to 2.

In an embodiment of the present invention, the above-mentioned filter layer of the display panel covers a plurality of wavelength conversion patterns.

In an embodiment of the present invention, the plurality of wavelength conversion patterns of the above-mentioned display panel include a first wavelength conversion pattern and a second wavelength conversion pattern. The converted wavelength of the first wavelength conversion pattern is different from that of the second wavelength conversion pattern, and the thickness of the filter layer covering a part of the first wavelength conversion pattern is different from that of the filter layer covering another part of the second wavelength conversion pattern.

In an embodiment of the present invention, the thickness of a portion of the filter layer of the display panel that overlaps any wavelength conversion pattern is greater than the thickness of another portion of the filter layer that overlaps the isolation structure layer.

In an embodiment of the present invention, the thickness of the portion of the filter layer of the display panel that overlaps any wavelength conversion pattern decreases from the geometric center of the filter layer toward the direction away from the geometric center, and the thickness of the filter layer decreases. The geometric center of the part overlaps with a corresponding one of the light-emitting elements.

In an embodiment of the present invention, the above-mentioned display panel further includes a plurality of color filter patterns, respectively overlapping the plurality of wavelength conversion patterns, and the filter layer is located between the plurality of color filter patterns and the wavelength conversion patterns.

In an embodiment of the present invention, the plurality of wavelength conversion patterns of the above-mentioned display panel include a first wavelength conversion pattern and a second wavelength conversion pattern that are arranged in one direction and are adjacent to each other. The converted wavelength of the first wavelength conversion pattern is different from the converted wavelength of the second wavelength conversion pattern. A portion of the filter layer located between the first wavelength conversion pattern and the second wavelength conversion pattern and filled in a corresponding one of the second grooves has a first width in the direction. The plurality of first grooves and the first wavelength conversion patterns are arranged in the direction, and the adjacent one is not provided with these wavelength conversion patterns. Another part of the filter layer located between the first wavelength conversion pattern and the one of the first grooves and filled in the corresponding other second groove has a second width in the direction, and the second The width is greater than the first width.

In an embodiment of the present invention, the above-mentioned isolation structure layer of the display panel has a first surface and a second surface respectively defining the first groove and the second groove. There is a first included angle between the first surface and the surface of the substrate. There is a second included angle between the second surface and the surface of the substrate, and the second included angle is greater than the first included angle.

In an embodiment of the present invention, the above-mentioned first included angle of the display panel is less than 70 degrees, and the second included angle is greater than 70 degrees and less than 90 degrees.

In an embodiment of the present invention, the plurality of wavelength conversion patterns of the above-mentioned display panel include a first wavelength conversion pattern, a second wavelength conversion pattern and a third wavelength conversion pattern. The converted wavelengths of the first wavelength conversion pattern and the second wavelength conversion pattern arranged in the first direction are different from each other. Conversion wavelengths of the first wavelength conversion pattern and the third wavelength conversion pattern arranged in the second direction are the same as each other. A portion of the filter layer located between the first wavelength conversion pattern and the second wavelength conversion pattern has a first width in the first direction. Another part of the filter layer located between the first wavelength conversion pattern and the third wavelength conversion pattern has a second width in the second direction, and the first width is greater than the second width.

In an embodiment of the present invention, the above-mentioned display panel further includes an auxiliary layer disposed on the substrate. A plurality of wavelength conversion patterns, a filter layer and an isolation structure layer cover the auxiliary layer.

In an embodiment of the present invention, any of the light-emitting elements and the auxiliary layer of the above-mentioned display panel respectively have a first thickness and a second thickness in the normal direction of the substrate, and the first thickness is greater than the second thickness.

In an embodiment of the present invention, the above-mentioned auxiliary layer of the display panel has a plurality of openings overlapping the plurality of first grooves, and a plurality of light emitting elements are respectively located in the openings of the auxiliary layer.

In an embodiment of the present invention, the plurality of light-emitting elements of the above-mentioned display panel are blue light-emitting diodes.

Based on the above, in the display panel of an embodiment of the present invention, a plurality of first grooves of the isolation structure layer are provided with a plurality of light emitting elements and define a plurality of pixel regions of the display panel, and the first grooves of the isolation structure layer A plurality of second grooves are also arranged between the grooves. Through the filter layer covering the isolation structure layer and filling the second grooves, part of the light emitted by any light-emitting element can be effectively blocked from passing through the wavelength conversion pattern and the isolation structure layer in the same first groove. A portion of the first groove is then emitted from the adjacent pixel area. In other words, light mixing caused by the generation of unexpected emitting colors can be avoided, which helps to improve the color shift phenomenon of the display panel and enhance the color gamut performance thereof.

As used herein, "about", "approximately", "substantially", or "substantially" includes the stated value and the average value within an acceptable deviation of the particular value as determined by one of ordinary skill in the art, taking into account all The measurement in question and the specific amount of error 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 within ±30%, ±20%, ±15%, ±10%, ±5%, for example. Furthermore, the terms "about", "approximately", "substantially", or "substantially" as used herein may depend on measurement properties, cutting properties, or other properties to select a more acceptable range or standard deviation, and may Not one standard deviation applies to all properties.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. It will 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 a physical and/or electrical connection. Furthermore, the "electrical connection" may refer to the existence of other elements between the two elements.

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 reference numerals are used in the drawings and description to refer to the same or like parts.

FIG. 1 is a schematic cross-sectional view of a display panel according to a first embodiment of the present invention. FIG. 2 is a schematic top view of the display panel of FIG. 1 . FIG. 3 is a graph of wavelength versus transmittance for the filter layer of FIG. 1 . It is particularly noted that, for the sake of clarity, the illustration of the substrate 100 in FIG. 1 is omitted in FIG. 2 .

Referring to FIGS. 1 and 2 , the display panel 10 includes a substrate 100 , an isolation structure layer 110 and a plurality of light emitting elements 120 . The substrate 100 has a surface 100s, and the isolation structure layer 110 is disposed on the surface 100s of the substrate 100 . The isolation structure layer 110 has a plurality of first grooves 111 , and the light emitting elements 120 are respectively disposed in the first grooves 111 . The first grooves 111 are arranged in multiple columns and rows in the directions X and Y respectively, and define a plurality of pixel areas PA, and the display panel 10 can generate light of various colors in the pixel areas PA. Such as red light, blue light and green light, to achieve the display effect of color images.

It should be noted that, in this embodiment, the number of the light-emitting elements 120 located in the same first groove 111 (or the pixel area PA) is exemplarily described by taking two as an example, which does not mean that the present invention is based on this for restrictions. In other embodiments, the number of light-emitting elements 120 located in the same first groove 111 (or pixel area PA) can also be adjusted to one or more than three according to actual application requirements. On the other hand, the light emitting element 120 may be a micro light emitting diode (micro-LED) or a sub-millimeter light emitting diode (mini light emitting diode, mini-LED). The material of the substrate 100 may include glass, quartz or a polymer material (eg, polyimide). The material of the isolation structure layer 110 may include a photoresist material, or a photoresist material containing titanium dioxide (TiO ₂ ).

In this embodiment, the above-mentioned plurality of light-emitting elements 120 may all be blue light-emitting diodes. Therefore, the display panel 10 further includes a plurality of wavelength conversion patterns 130 , and the wavelength conversion patterns 130 are disposed in at least part of the first recesses. The groove 111 covers the corresponding light-emitting element 120 . More specifically, the wavelength conversion pattern 130 can be used to convert light (eg, blue light) emitted by the light emitting element 120 (eg, blue light emitting diode) into red light, green light, or other suitable color light.

In the present embodiment, the light-emitting element 121 , the light-emitting element 122 and the light-emitting element 123 are respectively provided in the three first grooves 111 which are arranged along the direction X and are adjacent to each other. The two first grooves 111 in which the light-emitting element 121 and the light-emitting element 122 are provided are further provided with a wavelength conversion pattern 131 and a wavelength conversion pattern 132 respectively. For example, in this embodiment, the wavelength conversion pattern 131 is suitable for converting the blue light emitted by the light emitting element 121 into green light, and the wavelength conversion pattern 132 is suitable for converting the blue light emitted by the light emitting element 122 into red light, but Not limited to this. That is, the converted wavelength of the wavelength conversion pattern 131 is different from that of the wavelength conversion pattern 132 .

On the other hand, the two wavelength conversion patterns 130 arranged in the two first grooves 111 that are arranged along the direction Y and are adjacent to each other, such as the wavelength conversion pattern 131 and the wavelength conversion pattern 133 (or the wavelength conversion pattern 132 and wavelength conversion pattern 134), having the same conversion wavelength. That is to say, the display panel 10 exhibits the same light-emitting color in the plurality of pixel areas PA arranged along the direction Y. However, the present invention is not limited to this. According to other embodiments, the plurality of pixel areas PA used in the display panel for presenting different light emitting colors can also be arranged along the direction Y, while the plurality of pixel areas PA presenting the same light emitting color are arranged in the direction X Arrange on top.

Further, in order to prevent part of the light emitted by any light emitting element 120 from passing through the isolation structure layer 110 and emitting from the adjacent pixel area PA, the display panel 10 further includes a filter layer 140 covering the isolation structure layer 110 . Specifically, the isolation structure layer 110 further includes a plurality of second grooves 112 , and the filter layer 140 is filled in the second grooves 112 . The second grooves 112 and the plurality of first grooves 111 are alternately arranged in the direction X and the direction Y, respectively. 3 , the ratio of the transmittance of the filter layer 140 at (light) wavelengths of 530 nm and 628 nm to the transmittance of the filter layer 140 at (light) wavelength of 480 nm is greater than or equal to 2. That is, the filter layer 140 is suitable for absorbing blue light and ultraviolet light.

In this embodiment, the plurality of second grooves 112 are respectively a plurality of second grooves 112a and a plurality of second grooves 112b, the second grooves 112a are arranged along the direction X and extend in the direction Y, these The second grooves 112b are arranged along the direction Y and extend in the direction X. As shown in FIG. That is to say, the second grooves 112a and the second grooves 112b communicate with each other, and the vertical projection of the occupied areas on the substrate 100 presents a grid shape. Therefore, the filter layer 140 has a plurality of first extension parts 141 and a plurality of second extension parts 142 , the first extension parts 141 are arranged along the direction X and extend in the direction Y, and the second extension parts 142 . More specifically, the first extending portions 141 of the filter layer 140 overlap with the plurality of second grooves 112 a of the isolation structure layer 110 in a direction perpendicular to the surface 100 s of the substrate 100 (eg, the direction Z), and filter the light. The second extending portions 142 of the layer 140 are respectively overlapped with the plurality of second grooves 112b of the isolation structure layer 110 in a direction perpendicular to the surface 100s of the substrate 100 . On the other hand, in this embodiment, the filter layer 140 does not overlap the plurality of wavelength conversion patterns 130 in the direction perpendicular to the surface 100s of the substrate 100 , but the invention is not limited thereto.

It should be noted that, in this embodiment, the portion 141a of the first extension portion 141 of the filter layer 140 that fills the second groove 112a has a width W1 in the direction X, and the second extension portion 142 of the filter layer 140 fills the width W1 in the direction X. The portion 142a that enters the second groove 112b has a width W2 in the direction Y, and the width W1 is greater than the width W2. From another point of view, since the pixel areas PA used for presenting different colors of the display panel 10 of the present embodiment are arranged along the direction X, therefore, through the above-mentioned width and magnitude relationship, it is possible to avoid unintended emission color variations due to The resulting mixed light helps to improve the color shift phenomenon of the display panel 10 and enhance its color gamut performance.

In this embodiment, since the wavelength conversion pattern 130 is not disposed in the first groove 111 where the light-emitting element 123 is disposed, the display panel 10 may optionally further include an optical pattern 150 covering the light-emitting element 123 to increase the light-emitting element 123 of light energy utilization. For example, the material of the optical pattern 150 may be transparent resin with high refractive index, but not limited thereto. In other embodiments, the light emitted by the light emitting element 120 is, for example, ultraviolet light, and the optical pattern 150 may be a wavelength conversion pattern for converting the ultraviolet light into blue light.

Hereinafter, other embodiments will be listed to describe the present disclosure in detail, wherein the same components will be marked with the same symbols, and the description of the same technical content will be omitted.

4 is a schematic cross-sectional view of a display panel according to a second embodiment of the present invention. Referring to FIG. 4 , the difference between the display panel 11 of this embodiment and the display panel 10 of FIG. 1 is that the configuration of the filter layer is different. Specifically, the filter layer 140A of the display panel 11 further covers the plurality of wavelength conversion patterns 130 . In this embodiment, the thickness T1 of the portion 141c of the filter layer 140A covering the wavelength conversion pattern 131 in the direction perpendicular to the surface 100s of the substrate 100 is different from that of the portion 141d of the filter layer 140A covering the wavelength conversion pattern 132 in the direction perpendicular to the substrate 100 . The thickness T2 in the direction of the surface 100s of the 100 .

For example, in this embodiment, since the absorption conversion efficiency of the wavelength conversion pattern 131 is lower than that of the wavelength conversion pattern 132, the thickness T1 of the portion 141c of the filter layer 140A may be greater than the thickness T1 of the portion 141d of the filter layer 140A Thickness T2. Accordingly, the phenomenon that part of the light (eg, blue light) emitted by the light emitting element 120 overflows directly above the light emitting element 120 without being absorbed by the wavelength conversion pattern 130 can be effectively suppressed. In other words, it is possible to avoid light mixing caused by the generation of unintended emission colors, which helps to improve the color shift phenomenon of the display panel 11 and enhance its color gamut performance.

On the other hand, in this embodiment, the filter layer 140A is located between the wavelength conversion pattern 131 and the light emitting element 123 (or the first groove 111 without the wavelength conversion pattern 130 ) and fills the corresponding second groove The portion 141a of 112a has a width Wa in the direction X, the portion 141b of the filter layer 140A located between the wavelength conversion pattern 131 and the wavelength conversion pattern 132 and filling the corresponding second groove 112c has a width Wb in the direction X, and The width Wb of the portion 141b of the filter layer 140A is smaller than the width Wa of the portion 141a of the filter layer 140A. Accordingly, part of the blue light that is not absorbed by the wavelength conversion pattern 130 can be effectively reduced to overflow from the first groove 111 where the wavelength conversion pattern 130 is not provided, which is helpful to further improve the color shift phenomenon of the display panel 11 and enhance its color gamut Performance.

It is particularly noted that, in other embodiments, the thickness of the filter layer in the direction Z and the width of the part of the filter layer filled in the second groove 112 in the direction X can also be determined according to the wavelength conversion pattern 130 in the direction Z The thickness and width in the direction X can be adjusted to obtain the best brightness and color gamut performance.

5 is a schematic cross-sectional view of a display panel according to a third embodiment of the present invention. Referring to FIG. 5 , the difference between the display panel 12 of this embodiment and the display panel 11 of FIG. 4 is that the configuration of the isolation structure layer and the configuration of the filter layer are different. Specifically, the isolation structure layer 110A of the display panel 12 has a first surface 111s and a second surface 112s defining the first groove 111 and the second groove 112 , respectively. There is a first included angle A1 between the first surface 111s and the surface 100s of the substrate 100 , a second included angle A2 between the second surface 112s and the surface 100s of the substrate 100 , and the second included angle A2 of the isolation structure layer 110A is greater than the first included angle A1. For example, if the first included angle A1 of the isolation structure layer 110A is smaller than 70 degrees, the light collection effect of the isolation structure layer 110A can be further improved. When the second included angle A2 of the isolation structure layer 110A is greater than 70 degrees and less than 90 degrees, the volume of the filter layer 140B filled into the second groove 112 can be increased, which is helpful to suppress the overflow of blue light.

On the other hand, in this embodiment, the filter layer 140B of the display panel 12 is located between the wavelength conversion pattern 131 and the wavelength conversion pattern 132 and fills the corresponding width of the portion 141b' of the second groove 112 in the direction X Wb' is substantially equal to the portion 141a of the filter layer 140B located between the wavelength conversion pattern 131 and the light emitting element 123 (or the first groove 111 not provided with the wavelength conversion pattern 130 ) and filled in the corresponding second groove 112a. Width Wa in direction X.

6 is a schematic cross-sectional view of a display panel according to a fourth embodiment of the present invention. Referring to FIG. 6 , the difference between the display panel 13 of this embodiment and the display panel 11 of FIG. 4 is that the display panel 13 further includes an auxiliary layer 115 . In detail, the auxiliary layer 115 is disposed on the substrate 100 , and the plurality of wavelength conversion patterns 130 , the filter layer 140C are filled into a plurality of portions (eg, portions 141 a ″ and 141 b ″) of the second groove 112 and the isolation structure layer 110B covers the auxiliary layer 115 . The auxiliary layer 115 has a plurality of openings 115 a overlapping the plurality of first grooves 111 , and the plurality of light emitting elements 120 of the display panel 13 are respectively located in the openings 115 a of the auxiliary layer 115 . In this embodiment, the light-emitting element 120 and the auxiliary layer 115 have thicknesses Ta and Tb respectively in the normal direction (eg, the direction Z) of the surface 100 s of the substrate 100 , and the thickness Ta of the light-emitting element 120 is greater than the thickness of the auxiliary layer 115 . Tb. Accordingly, the utilization rate of light energy of the light emitting element 120 can be further improved.

On the other hand, in this embodiment, the materials of the auxiliary layer 115 and the isolation structure layer 110B can be selectively the same, but the invention is not limited to this. In other embodiments, the material of the auxiliary layer 115 and the material of the isolation structure layer 110B may also be different.

7 is a schematic cross-sectional view of a display panel according to a fifth embodiment of the present invention. Referring to FIG. 7 , the difference between the display panel 14 of this embodiment and the display panel 10 of FIG. 1 is that the configuration of the filter layer is different. Specifically, the filter layer 140D of the display panel 14 further covers the plurality of wavelength conversion patterns 130 . In the present embodiment, the thickness T3 of the portion 141e1 of the wavelength conversion pattern 131 covered (or overlapped) by the filter layer 140D in the direction (eg, the direction Z) perpendicular to the surface 100s of the substrate 100 is greater than the thickness T3 covered by the filter layer 140D (or The thickness T4 of the portion 141 e 2 overlapping the isolation structure layer 110 in the direction perpendicular to the surface 100 s of the substrate 100 . Similarly, the thickness T3 ′ of the portion 141f1 of the filter layer 140D covering (or overlapping) the wavelength conversion pattern 132 in the direction perpendicular to the surface 100s of the substrate 100 is greater than that of the filter layer 140D covering (or overlapping) the isolation structure layer 110 The thickness T4' of the portion 141f2 in the direction perpendicular to the surface 100s of the substrate 100.

More specifically, the thickness of the portion of the filter layer 140D overlapping any of the wavelength conversion patterns 130 (eg, the portion 141e1 and the portion 141f1 ) in the direction perpendicular to the surface 100s of the substrate 100 is determined by the thickness of the portion of the filter layer 140D. The geometric center (eg, geometric center C and geometric center C') decreases away from the geometric center. In this embodiment, the cross-sectional (eg, XZ plane) contours of the portion 141e1 and the portion 141f1 of the filter layer 140D may be arc-shaped, but not limited thereto. In other embodiments, the cross-sectional profile of the portion of the filter layer overlapping the wavelength conversion pattern may also be in the shape of a zigzag line.

It is worth mentioning that since the amount of blue light directly above the light-emitting element 120 is relatively large, the above-mentioned thickness relationship of the light-transmitting filter layer 140D can effectively prevent part of the light (such as blue light) emitted by the light-emitting element 120 from being wavelength-converted. A phenomenon in which the pattern 130 overflows from directly above the light-emitting element 120 when the pattern 130 is absorbed. In other words, it is possible to avoid light mixing caused by the generation of unintended emission colors, which helps to improve the color shift phenomenon of the display panel 15 and enhance the color gamut performance thereof. In addition, the thickness gradient relationship of the portion of the light-transmitting filter layer 140D overlapping the wavelength conversion pattern 130 (eg, the portion 141e1 and the portion 141f1 ) can also improve the color gamut performance and optimize the overall brightness.

8 is a schematic cross-sectional view of a display panel according to a sixth embodiment of the present invention. Referring to FIG. 8 , the difference between the display panel 15 of this embodiment and the display panel 11 of FIG. 4 is that the composition of the display panel is different. In order to further improve the color gamut performance of the display panel 15 , for example, to achieve a wide color gamut color performance, the display panel 15 may further include a color filter layer 200 . The filter layer 140A is located between the color filter layer 200 and the wavelength conversion pattern 130 . In this embodiment, the color filter layer 200 includes a plurality of color filter patterns 210 , a plurality of light-shielding patterns 220 and a plurality of light-transmitting patterns 230 . The color filter patterns 210 and the light-transmitting patterns 230 are respectively disposed between the light-shielding patterns 220 , and the color filter patterns 210 are respectively overlapped with the wavelength conversion patterns 130 .

For example, the color filter pattern 211 and the color filter pattern 212 of the color filter layer 200 are respectively overlapped with the wavelength conversion pattern 131 and the wavelength conversion pattern 132 in a direction perpendicular to the surface 100 s of the substrate 100 (eg, the direction Z), They are respectively a green filter pattern and a red filter pattern, but not limited thereto. In other embodiments, the wavelength of the transmitted light of the color filter pattern can also be adjusted according to the converted wavelength of the corresponding wavelength conversion pattern 130 . It should be noted that, in this embodiment, since the wavelength conversion pattern 130 is not provided in the first groove 111 where the light-emitting element 123 is provided, the light-transmitting pattern 230 can be provided in the portion of the color filter layer 200 overlapping the light-emitting element 123 . , so that the light (eg blue light) emitted by the light-emitting element 123 can directly pass through the color filter layer 200 .

To sum up, in the display panel of an embodiment of the present invention, a plurality of first grooves of the isolation structure layer are provided with a plurality of light-emitting elements and define a plurality of pixel regions of the display panel, and the isolation structure layer has a plurality of first grooves. A plurality of second grooves are also provided between the first grooves. Through the filter layer covering the isolation structure layer and filling the second grooves, part of the light emitted by any light-emitting element can be effectively blocked from passing through the wavelength conversion pattern and the isolation structure layer in the same first groove. A portion of the first groove is then emitted from the adjacent pixel area. In other words, light mixing caused by the generation of unexpected emitting colors can be avoided, which helps to improve the color shift phenomenon of the display panel and enhance the color gamut performance thereof.

10, 11, 12, 13, 14, 15: Display panel 100: Substrate 100s: Surface 110, 110A, 110B: isolation structure layer 111: The first groove 111s: First surface 112, 112a, 112b, 112c: the second groove 112s: Second surface 115: Auxiliary Layer 115a: Opening 120, 121, 122, 123: light-emitting elements 130, 131, 132, 133, 134: wavelength conversion patterns 140, 140A, 140B, 140C, 140D: filter layer 141: The first extension 141a, 141a", 141b, 141b', 141b", 141c, 141d, 141e1, 141e2, 141f1, 141f2, 142a: Parts 142: Second extension 150: Optical Pattern 200: color filter layer 210, 211, 212: Color filter pattern 220: Shading Pattern 230: light transmission pattern A1: The first included angle A2: Second included angle C, C': geometric center PA: pixel area T1, T2, T3, T4, T3', T4', Ta, Tb: Thickness W1, W2, Wa, Wb, Wb': width X, Y, Z: direction

FIG. 1 is a schematic cross-sectional view of a display panel according to a first embodiment of the present invention. FIG. 2 is a schematic top view of the display panel of FIG. 1 . FIG. 3 is a graph of wavelength versus transmittance for the filter layer of FIG. 1 . 4 is a schematic cross-sectional view of a display panel according to a second embodiment of the present invention. 5 is a schematic cross-sectional view of a display panel according to a third embodiment of the present invention. 6 is a schematic cross-sectional view of a display panel according to a fourth embodiment of the present invention. 7 is a schematic cross-sectional view of a display panel according to a fifth embodiment of the present invention. 8 is a schematic cross-sectional view of a display panel according to a sixth embodiment of the present invention.

10: Display panel

100: Substrate

100s: Surface

110: Isolation structure layer

111: The first groove

111s: First surface

112: Second groove

112s: Second surface

120, 121, 122, 123: light-emitting elements

130, 131, 132: wavelength conversion pattern

140: filter layer

141: The first extension

141a: Parts

150: Optical Pattern

X, Y, Z: direction

Claims (14)

A display panel, comprising: a substrate; an isolation structure layer disposed on the substrate, the isolation structure layer having a plurality of first grooves and a plurality of second grooves alternately arranged; a plurality of light-emitting elements, respectively disposed on the in the first groove; a plurality of wavelength conversion patterns disposed in at least part of the first grooves and covering at least part of the light-emitting elements; and a filter layer covering the isolation structure layer and filling the second In the groove, wherein the wavelength conversion patterns include a first wavelength conversion pattern and a second wavelength conversion pattern arranged in one direction and adjacent to each other, the conversion wavelength of the first wavelength conversion pattern is different from that of the second wavelength conversion pattern. Converting wavelengths, the filter layer is located between the first wavelength conversion pattern and the second wavelength conversion pattern and filled in a corresponding second groove has a first width in the direction, the first The groove and the first wavelength conversion pattern are arranged in the direction and the adjacent one is not provided with the wavelength conversion patterns, and the filter layer is located on the one of the first wavelength conversion pattern and the first grooves The other part between and filling the corresponding other second groove has a second width in the direction, and the second width is larger than the first width. The display panel of claim 1, wherein a ratio of the transmittance of the filter layer at wavelengths of 530 nm and 628 nm to the transmittance of the filter layer at a wavelength of 480 nm is greater than or equal to 2. The display panel of claim 1, wherein the filter layer covers the wavelength conversion patterns. The display panel of claim 3, wherein a thickness of the filter layer covering a part of the first wavelength conversion pattern is different from a thickness of the filter layer covering another part of the second wavelength conversion pattern. The display panel of claim 3, wherein a thickness of a portion of the filter layer overlapping any of the wavelength conversion patterns is greater than a thickness of another portion of the filter layer overlapping the isolation structure layer. The display panel of claim 3, wherein the thickness of the portion of the filter layer overlapping any of the wavelength conversion patterns decreases from the geometric center of the portion of the filter layer in a direction away from the geometric center, and the The geometric center of the portion of the filter layer overlaps a corresponding one of the light-emitting elements. The display panel of claim 3, further comprising a plurality of color filter patterns respectively overlapping the wavelength conversion patterns, and the filter layer is located between the color filter patterns and the wavelength conversion patterns. The display panel of claim 1, wherein the isolation structure layer has a first surface and a second surface respectively defining the first groove and the second groove, and there is a space between the first surface and the surface of the substrate The first included angle has a second included angle between the second surface and the surface of the substrate, and the second included angle is greater than the first included angle. The display panel of claim 8, wherein the first included angle is less than 70 degrees, and the second included angle is greater than 70 degrees and less than 90 degrees. The display panel according to claim 1, wherein the wavelength conversion patterns further comprise third wavelength conversion patterns, and the converted wavelengths of the first wavelength conversion pattern and the third wavelength conversion pattern arranged in another direction are the same as each other, the Another part of the filter layer located between the first wavelength conversion pattern and the third wavelength conversion pattern has a third width in the other direction, and the first width is greater than the third width. The display panel of claim 1, further comprising: an auxiliary layer disposed on the substrate, and the wavelength conversion patterns, the filter layer and the isolation structure layer cover the auxiliary layer. The display panel of claim 11, wherein any of the light-emitting elements and the auxiliary layer respectively have a first thickness and a second thickness in the normal direction of the substrate, and the first thickness is greater than the second thickness. The display panel of claim 11, wherein the auxiliary layer has a plurality of openings overlapping the first grooves, and the light-emitting elements are respectively located in the openings of the auxiliary layer. The display panel of claim 1, wherein the light-emitting elements are blue light-emitting diodes.

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