Light emitting display unit and display device

Abstract

The application provides a light emitting display unit and a display device. The light emitting display unit comprises a redistribution layer and a plurality of micro light emitting elements. The redistribution layer comprises a plurality of electrode patterns, a plurality of contact pad patterns, an insulating layer and a plurality of conductive vias. The first gap and the second gap are respectively arranged between two adjacent electrode patterns and between two adjacent contact pad patterns. The third length of the overlapping area of the normal projection of the contact pad pattern on the contact pad pattern in the first direction is less than or equal to the second length of the second gap in the first direction. The micro light emitting element is arranged on the redistribution layer and electrically connected with the electrode pattern.

Description

Technical Field

[0001] This invention relates to a self-emissive display technology, and more particularly to an emissive display unit and display device. Background Technology

[0002] After the miniature LED display units are transferred in large quantities from the epitaxial substrate to the film layer (such as the blue film), during the process of using ejector pins for component removal (such as sorting and bonding), the miniature LED display units without the protection of a transparent rigid substrate (such as a glass substrate or sapphire substrate) will bend on the film layer. Furthermore, because some areas of the miniature LED display units do not have a metal layer but only an insulating layer, the supporting strength of the miniature LED display units is insufficient, resulting in splitting, which in turn affects the overall structural reliability and yield. Summary of the Invention

[0003] This invention relates to a light-emitting display unit that avoids splitting, thereby improving yield and achieving better structural reliability.

[0004] The present invention relates to a display device comprising the above-mentioned light-emitting display unit, which can have a better display yield.

[0005] According to an embodiment of the present invention, a light-emitting display unit includes a redistributed circuit layer and a plurality of micro light-emitting elements. The redistributed circuit layer includes a plurality of electrode patterns, a plurality of pad patterns, an insulating layer, and a plurality of conductive vias. The insulating layer is disposed between the electrode patterns and the pad patterns. The conductive vias are disposed within the insulating layer and electrically connect the electrode patterns to their corresponding pad patterns. The electrode patterns are electrically independent of each other. A first gap and a second gap are respectively formed between two adjacent electrode patterns and between two corresponding adjacent pad patterns. The first gap and the second gap have a first length and a second length, respectively, in a first direction. The third length of the overlapping area of ​​the orthographic projection of the first gap onto the pad pattern and the pad pattern in the first direction is less than or equal to the second length of the second gap in the first direction. The micro light-emitting elements are disposed on the redistributed circuit layer and electrically connected to the electrode patterns.

[0006] According to an embodiment of the present invention, a light-emitting display unit includes a redistributed circuit layer and a plurality of micro-light-emitting elements. The redistributed circuit layer includes a plurality of electrode patterns, a plurality of pad patterns, an insulating layer, and a plurality of conductive vias. The insulating layer is disposed between the electrode patterns and the pad patterns. The conductive vias are disposed within the insulating layer and electrically connect the electrode patterns to their corresponding pad patterns. The micro-light-emitting elements are disposed on the redistributed circuit layer and electrically connected to the electrode patterns. A portion of the insulating layer is exposed between the micro-light-emitting elements. The light-emitting display unit has a first length in a first direction, and the second length of the insulating layer exposed between the micro-light-emitting elements in the first direction is less than 50% of the first length. In the first direction, the insulating layer extends from the centerline of the light-emitting display unit to its edge, overlapping at least one of the electrode patterns and the pad patterns.

[0007] According to an embodiment of the present invention, a display device includes a driving substrate and a plurality of light-emitting display units. The driving substrate includes a plurality of pads. The light-emitting display units are electrically connected to the driving substrate via the pads, and each light-emitting display unit includes a redistributed circuit layer and a plurality of micro-light-emitting elements. The redistributed circuit layer includes a plurality of electrode patterns, a plurality of pad patterns, an insulating layer, and a plurality of conductive vias. The insulating layer is disposed between the electrode patterns and the pad patterns. The conductive vias are disposed within the insulating layer and electrically connect the electrode patterns to the corresponding pad patterns. The electrode patterns are electrically independent of each other. A first gap and a second gap are respectively provided between two adjacent electrode patterns and between two corresponding adjacent pad patterns. The first gap and the second gap have a first length and a second length respectively in a first direction. The third length of the overlapping area of ​​the orthographic projection of the first gap onto the pad pattern and the pad pattern in the first direction is less than or equal to the second length of the second gap in the first direction. The micro-light-emitting elements are disposed on the redistributed circuit layer and electrically connected to the electrode patterns.

[0008] Based on the above, in the design of the light-emitting display unit of the present invention, a first gap and a second gap are respectively provided between two adjacent electrode patterns and between two corresponding adjacent pad patterns. The first gap and the second gap have a first length and a second length respectively in a first direction. The third length of the overlapping area of ​​the first gap's orthographic projection onto the pad pattern and the pad pattern in the first direction is less than or equal to the second length of the second gap in the first direction. This design allows the gaps between the electrode patterns and the pad patterns to be staggered, effectively preventing splitting and improving yield, thus enabling the light-emitting display unit of the present invention to have better structural reliability. Furthermore, the display device including the light-emitting display unit of the present invention can have better display yield. Attached Figure Description

[0009] Figure 1A This is a top perspective view of a light-emitting display unit according to an embodiment of the present invention;

[0010] Figure 1B It is along Figure 1A A schematic cross-sectional view of line II;

[0011] Figure 2 This is a top perspective view of a light-emitting display unit according to another embodiment of the present invention;

[0012] Figure 3 This is a schematic diagram of a display device according to an embodiment of the present invention.

[0013] Explanation of reference numerals in the attached figures

[0014] 10: Display devices;

[0015] 100a: Light-emitting display unit;

[0016] 110: Relay the line layer;

[0017] 112a, 112b, 113: Electrode patterns;

[0018] 114a, 114b, 115: Pad patterns;

[0019] 116: Insulation layer;

[0020] 118: Conductive via;

[0021] 120: Miniature light-emitting element;

[0022] 122: First color micro light-emitting element / Red micro light-emitting element;

[0023] 124: First color micro-light-emitting element / Green micro-light-emitting element;

[0024] 126: Second color micro-light-emitting element / Blue micro-light-emitting element;

[0025] 130: Encapsulating colloid;

[0026] 200: Driver substrate;

[0027] 201: Upper surface;

[0028] 202: Lower surface;

[0029] 210: Pad;

[0030] 300: Drive circuit components;

[0031] A1: First electrode pattern;

[0032] A2: Second electrode pattern;

[0033] A3: Pattern of the third electrode;

[0034] B1: First pad pattern;

[0035] B2: Second pad pattern;

[0036] B3: Third pad pattern;

[0037] C: Centerline;

[0038] D1: First direction;

[0039] D2: Second direction;

[0040] E1, L1, L1': First length;

[0041] E2, L2, L2': Second length;

[0042] G1, G1': First gap;

[0043] G2, G2': Second gap;

[0044] H1, W1: First distance;

[0045] H2, W2: Second distance;

[0046] L3, L3': Third length;

[0047] L4, L4': Fourth length;

[0048] P1: First spacing;

[0049] P2: Second spacing;

[0050] S1, S2: Edges;

[0051] T: Thickness;

[0052] T1: First thickness;

[0053] T2: Second thickness;

[0054] T3: Third thickness;

[0055] W: Width. Detailed Implementation

[0056] Reference will now be made in detail to exemplary embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element references are used in the drawings and description to denote the same or similar parts.

[0057] Figure 1A This is a top perspective view of a light-emitting display unit according to an embodiment of the present invention. Figure 1B It is along Figure 1A A schematic cross-sectional view of line II. For clarity, Figure 1AThe conductive vias of the redistributed circuit layer are omitted in the text.

[0058] Please also refer to Figure 1A and Figure 1B In this embodiment, the light-emitting display unit 100a includes a redistributed circuit layer 110 and a plurality of micro light-emitting elements 120. The redistributed circuit layer 110 includes a plurality of electrode patterns 112a, a plurality of pad patterns 114a, an insulating layer 116, and a plurality of conductive vias 118. The insulating layer 116 is disposed between the electrode patterns 112a and the pad patterns 114a. The conductive vias 118 are disposed within the insulating layer 116 and electrically connect the electrode patterns 112a and the corresponding pad patterns 114a. The electrode patterns 112a are electrically independent of each other. A first gap G1 and a second gap G2 are respectively provided between two adjacent electrode patterns 112a and between two corresponding adjacent pad patterns 114a. The first gap G1 and the second gap G2 have a first length L1 and a second length L2 respectively in a first direction D1. The third length L3 of the overlapping area of ​​the first gap G1 projected onto the pad pattern 114a and the pad pattern 114a in the first direction D1 is less than or equal to the second length L2 of the second gap G2 in the first direction D1. The fourth length L4 of the overlapping area of ​​the second gap G2 projected onto the electrode pattern 112a and the electrode pattern 112a in the first direction D1 is less than or equal to the first length L1 of the first gap G1 in the first direction D1. These micro-light-emitting elements 120 are disposed on the redistribution layer 110 and are electrically connected to the electrode pattern 112a.

[0059] In detail, in this embodiment, the electrode pattern 112a of the redistributed circuit layer 110 may be located above the pad pattern 114a. In one embodiment, the electrode pattern 112a is disposed on the top surface of the insulating layer 116, while one side of the pad pattern 114a may be flush with the bottom surface of the insulating layer 116, that is, the pad pattern 114a is embedded in the insulating layer 116. This allows for a relatively flat surface when a solder resist layer (not shown) is subsequently disposed on the bottom surface of the insulating layer 116, but is not a limitation thereof. The electrode pattern 112a can be electrically connected to the corresponding pad pattern 114a through a conductive via 118 extending from the top surface of the insulating layer 116 to the pad pattern 114a. In other words, the upper layer of the redistributed circuit layer 110 is the electrode pattern 112a, and the lower layer is the pad pattern 114a. The electrode pattern 112a and the pad pattern 114a can be made of, for example, copper, while the insulating layer 116 can be made of, for example, an organic or inorganic insulating material, but is not limited thereto. The number of these micro-light-emitting elements 120 is, for example, three, arranged at intervals along a second direction D2 perpendicular to the first direction D1 on the redistributed circuit layer 110. In one embodiment, the micro-light-emitting elements 120 may include a red micro-light-emitting element 122, a green micro-light-emitting element 124, and a blue micro-light-emitting element 126, but is not limited thereto. One end of each of these micro-light-emitting elements 120 is electrically connected to the electrode pattern 112a, and the other end of each of these micro-light-emitting elements 120 is electrically connected to the electrode pattern 113. That is, the light-emitting display unit 100a can be a common cathode design. The electrode pattern 113 is also electrically connected to the two pad patterns 115 below it through conductive vias 118.

[0060] Please refer to the following at the same time: Figure 1A and Figure 1B A portion of the insulating layer 116 is exposed between these micro-light-emitting elements 120. Specifically, the light-emitting display unit 100a has a first length E1 in the first direction D1, and the second length E2 of the insulating layer 116 exposed between the micro-light-emitting elements 120 in the first direction D1 is less than 50% of the first length E1. Viewed from above, in the first direction D1, the insulating layer 116, from the center line C to the edge S1 of the light-emitting display unit 100a, overlaps with at least one of the electrode pattern 112a and the pad pattern 114a. That is, the insulating layer 116 is not continuously exposed from the center line C to the edge S1. More specifically, the insulating layer 116 exposed between the micro-light-emitting elements 120 is not continuously exposed.

[0061] Furthermore, the light-emitting display unit 100a of this embodiment also includes an encapsulating colloid 130, wherein the encapsulating colloid 130 is disposed on the redistribution layer 110 and covers the micro light-emitting element 120. Here, the material of the encapsulating colloid 130 is, for example, an organic polymer, acrylic, or resin. The ratio of the thickness T (including the thickness T3 of the insulating layer 116 plus the thickness of the encapsulating colloid 130) to the width W (here, the width of the insulating layer 116 in the second direction D2) of the light-emitting display unit 100a is between 0.3 and 1. The width W mentioned here refers to the maximum width. In one embodiment, the width W may be, for example, 270 micrometers to 330 micrometers, but is not limited thereto. In one embodiment, the thickness T is, for example, 100 micrometers, and the width W is, for example, 300 micrometers, but is not limited thereto. In cross-sectional view, the electrode pattern 112a has a first thickness T1, the pad pattern 114a has a second thickness T2, and the insulating layer 116 has a third thickness T3. The first thickness T1 and the second thickness T2 are each less than the third thickness T3. Preferably, the ratio of the first thickness T1 or the second thickness T2 to the third thickness T3 is greater than 0.3 and less than or equal to 0.5. In one embodiment, the first thickness T1, the second thickness T2, and the third thickness T3 may all be less than 10 micrometers. In one embodiment, the first thickness T1 may be, for example, 4 micrometers, the second thickness T2 may be, for example, 3 micrometers, and the third thickness T3 may be, for example, 9 micrometers. Because the light-emitting display unit 100a is too wide and thin, the long and thin light-emitting display unit 100a is prone to bending and breaking during the ejector pin process. Furthermore, the micro-light-emitting elements are spaced apart along the first direction D2 on the redistribution layer 110, resulting in the insulation layer being exposed in the middle. Because the redistribution layer 110 cannot support these micro-light-emitting elements 120, it is prone to splitting. Therefore, the yield is improved by strengthening the structural strength of the redistribution layer 110.

[0062] In addition, please refer to the following: Figure 1A and Figure 1BIn this embodiment, electrode pattern 112a includes a first electrode pattern A1, a second electrode pattern A2, and a third electrode pattern A3, which are separated from each other. Pad pattern 114a includes a first pad pattern B1, a second pad pattern B2, and a third pad pattern B3, which are also separated from each other. The orthographic projection of the second electrode pattern A2 onto pad pattern 114a overlaps with the first pad pattern B1, the second pad pattern B2, and the third pad pattern B3. That is, the orthographic projection of the second electrode pattern A2 onto pad pattern 114a extends from the second pad pattern B2 to both sides, overlapping the first pad pattern B1 and the third pad pattern B3, and can cover the second gap G2 between the first pad pattern B1 and the second pad pattern B2, and between the second pad pattern B2 and the third pad pattern B3. Preferably, the ratio of the overlapping area of ​​the orthographic projection of the second electrode pattern A2 onto pad pattern 114a with the first pad pattern B1 or the third pad pattern B3 to the area of ​​the first pad pattern B1 or the third pad pattern B3 is less than 0.1. In other words, the ratio of the overlapping area of ​​the orthographic projection of the second electrode pattern A2 onto the pad pattern 114a and the first pad pattern B1 to the area of ​​the first pad pattern B1 is less than 0.1, and the ratio of the overlapping area of ​​the orthographic projection of the second electrode pattern A2 onto the pad pattern 114a and the third pad pattern B3 to the area of ​​the third pad pattern B3 is also less than 0.1. Furthermore, the orthographic projections of the first gap G1 between the first electrode pattern A1 and the second electrode pattern A2, and between the second electrode pattern A2 and the third electrode pattern A3, onto the pad pattern 114a are also covered by the first pad pattern B1 and the third pad pattern B2, respectively.

[0063] In short, because the electrode pattern 112a and the pad pattern 114a of the redistributed circuit layer 110 in this embodiment are arranged in an overlapping manner, the first gap G1 of the upper electrode pattern 112a and the second gap G2 of the lower pad pattern 114a are staggered, that is, their orthographic projections do not overlap. The orthographic projection of the first gap G1 overlaps the pad pattern 114a (i.e., the first pad pattern B1 and the third pad pattern B3), while the orthographic projection of the second gap G2 overlaps the electrode pattern 112a (i.e., the second electrode pattern A2). In other words, the orthographic projections of the gaps can overlap either the electrode pattern 112a or the pad pattern 114a. This strengthens the structural strength of the redistributed circuit layer 110, improving yield and mitigating the splitting problem caused by the ejector pin process in the prior art. Furthermore, it eliminates the need for transparent rigid materials for protection, effectively reducing process and manufacturing costs. Therefore, the light-emitting display unit 100a of this embodiment has better structural reliability.

[0064] It must be noted that the following embodiments use the component reference numerals and some content from the foregoing embodiments, with the same reference numerals used to represent the same or similar components, and descriptions of the same technical content omitted. For explanations of the omitted parts, please refer to the foregoing embodiments; these will not be repeated in the following embodiments.

[0065] Figure 2 This is a top perspective view of a light-emitting display unit according to another embodiment of the present invention. For clarity, Figure 2 The conductive vias of the overlay circuit layer are also omitted. Please refer to [the original text]. Figure 1A and Figure 2 In this embodiment, the light-emitting display unit 100b and Figure 1A Similar to the light-emitting display unit 100a, the difference lies in the fact that, due to different electrical requirements, the top view shape of the electrode pattern 112b in this embodiment differs from that of the other embodiment. Figure 1A The top view shape of electrode pattern 112a is shown. Because the design of electrode pattern 112b differs from electrode pattern 112a, the top view shape of the first gap G1' in this embodiment (e.g., Z-shaped) differs from the top view shape of the first gap G1 (e.g., straight). The third length L3' of the orthographic projection of the first gap G1' onto the pad pattern 114b and the overlapping area of ​​the pad pattern 114b in the first direction D1 is less than the second length L2' of the second gap G2' in the first direction D1. The fourth length L4' of the orthographic projection of the second gap G2' onto the electrode pattern 112b and the overlapping area of ​​the electrode pattern 112b in the first direction D1 is less than the first length L1' of the first gap G1' in the first direction D1. In one embodiment, the third length L3' may be less than 80% of the second length L2', preferably less than 50%, and the fourth length L4' may be less than 80% of the first length L1', preferably less than 50%.

[0066] Furthermore, in this embodiment, the micro-light-emitting element 120 includes a plurality of first-color micro-light-emitting elements 122 (or 124) and second-color micro-light-emitting elements 126. A first spacing P1 exists between adjacent first-color micro-light-emitting elements 122 (or 124), while a second spacing P2 exists between the second-color micro-light-emitting element 126 and adjacent first-color micro-light-emitting elements 122 (or 124), and the second spacing P2 is greater than the first spacing P1. That is, the spacing between micro-light-emitting elements 120 of the same color (i.e., the first spacing P1) is smaller than the spacing between micro-light-emitting elements 120 of different colors (i.e., the second spacing P2). The spacing mentioned here refers to the minimum spacing. In one embodiment, the first-color micro-light-emitting element 122 may be, for example, a red micro-light-emitting element, or the first-color micro-light-emitting element 124 may be, for example, a green micro-light-emitting element, and the second-color micro-light-emitting element 126 may be, for example, a blue micro-light-emitting element. Herein, the micro light-emitting element 120 includes two red micro light-emitting elements 122, one blue micro light-emitting element 126, and two green micro light-emitting elements 124, wherein the blue micro light-emitting element 126 is located between the red micro light-emitting element 122 and the green micro light-emitting element 124. The symmetrical configuration can reduce the design complexity of the corresponding electrode pattern 112b.

[0067] In addition, please refer to Figure 2 In this embodiment, the insulating layer 116 has a width W in a second direction D2 perpendicular to the first direction D1, and the electrode pattern 112b is recessed by a first distance W1 relative to the insulating layer 116 in the second direction D2, and the pad pattern 114b is recessed by a second distance W2 relative to the insulating layer 116 in the second direction D2. Preferably, the ratio of the first distance W1 to the width W and the ratio of the second distance W2 to the width W can be, for example, between 0.05 and 0.15. If the above ratios are too small, it will be detrimental to the bonding yield of the micro-light-emitting element 120 and the electrode pattern 112b, and the pad pattern 114b2 with the subsequent driving substrate; conversely, if the above ratios are too large, when bonding with the driving substrate, if the cutting tolerance causes the sidewall of the pad pattern 114b to be exposed (i.e. not covered by the insulating layer 116), the solder bumps will be squeezed onto the electrode pattern 112b due to thermal pressure, resulting in a short circuit. In one embodiment, the first distance W1 and the second distance W2 may each be, for example, 20 meters to 30 micrometers. In another embodiment, the first distance W1 and the second distance W2 may be different; for example, the first distance W1 may be greater than the second distance W2, which can avoid short circuits caused by cutting tolerances during subsequent part making.

[0068] Additionally, please refer to... Figure 2Two adjacent pad patterns 114b and 115 arranged in the first direction D1 have a first distance H1 and a second distance H2, wherein the first distance H1 is adjacent to the edge S2 of the insulating layer 116 relative to the second distance H2, and the first distance H1 is greater than the second distance H2. This design allows for the provision of space to prevent and accommodate solder bumps that will be squeezed onto the insulating layer 116 due to subsequent thermoforming, effectively improving the structural reliability of the light-emitting display unit 100b.

[0069] Figure 3 This is a schematic diagram of a display device according to an embodiment of the present invention. Please refer to... Figure 3 In this embodiment, the display device 10 includes a driving substrate 200 and as described above. Figure 1B The display device 10 includes multiple light-emitting display units 100a, wherein the light-emitting display units 100a are electrically connected to the upper surface 201 of the driving substrate 200. Specifically, the driving substrate 200 includes multiple pads 210 separated from each other, and the pad pattern 114a of the redistribution layer 110 of each light-emitting display unit 100a is electrically connected to the driving substrate 200 through the pads 210. Each pixel in the pixel region of the display device 10 is formed by one light-emitting display unit 100a. Furthermore, the display device 10 of this embodiment also includes a driving circuit element 300, disposed on the lower surface 202 of the driving substrate 200 relatively away from the light-emitting display units 100a and electrically connected to the driving substrate 200 to control the multiple light-emitting display units to form a display image.

[0070] It is worth mentioning that, in other embodiments not shown, the light-emitting display unit may include at least one light-emitting display unit 100a or 100b as required, and the present invention is not limited thereto. That is, the number of light-emitting display units may be one or more, and they may have the same structure or different structures, which can be selected according to requirements. In addition, the driving substrate 200 of this embodiment may be, for example, a complementary metal-oxide-semiconductor (CMOS) substrate, a liquid crystal on silicon (LCOS) substrate, a thin film transistor (TFT) substrate, a printed circuit board (PCB), or other substrates with working circuits, and is not limited thereto.

[0071] In summary, in the design of the light-emitting display unit of the present invention, there are a first gap and a second gap between two adjacent electrode patterns and between two corresponding adjacent pad patterns, respectively. The first gap and the second gap have a first length and a second length, respectively, in a first direction. The third length of the overlapping area of ​​the first gap's orthographic projection onto the pad pattern and the pad pattern in the first direction is less than or equal to the second length of the second gap in the first direction. This design allows the gaps between the electrode patterns and the pad patterns to be staggered, effectively preventing splitting and improving yield, thus enabling the light-emitting display unit of the present invention to have better structural reliability. Furthermore, display devices including the light-emitting display unit of the present invention can have better display yield.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A light emitting display unit, characterized by, The light emitting display unit comprises: a re-wiring layer comprising a plurality of electrode patterns, a plurality of contact pad patterns, an insulating layer disposed between the plurality of electrode patterns and the plurality of contact pad patterns, and a plurality of conductive vias disposed within the insulating layer and electrically connecting the plurality of electrode patterns and corresponding ones of the plurality of contact pad patterns, the plurality of electrode patterns being electrically independent from each other, wherein adjacent ones of the plurality of electrode patterns and corresponding adjacent ones of the plurality of contact pad patterns have first and second gaps therebetween, the first and second gaps having first and second lengths in a first direction, respectively, and a third length of a projection of the first gap onto the plurality of contact pad patterns and an overlapping area of the plurality of contact pad patterns in the first direction being less than or equal to the second length of the second gap in the first direction; and a plurality of micro light emitting elements disposed on the re-wiring layer and electrically connected to the plurality of electrode patterns.

2. The light-emitting display unit according to claim 1, wherein a fourth length of a projection of the second gap onto the plurality of electrode patterns and an overlapping area of the plurality of electrode patterns in the first direction being less than or equal to the first length of the first gap in the first direction.

3. The light-emitting display unit according to claim 1, wherein The plurality of micro light emitting elements comprise a plurality of first color micro light emitting elements and second color micro light emitting elements, adjacent ones of the plurality of first color micro light emitting elements being separated by a first pitch, and the second color micro light emitting elements being separated from adjacent ones of the plurality of first color micro light emitting elements by a second pitch, the second pitch being greater than the first pitch.

4. The light-emitting display unit according to claim 1, wherein The insulating layer has a width in a second direction perpendicular to the first direction, the plurality of electrode patterns are recessed relative to the insulating layer in the second direction by a first distance, and the plurality of contact pad patterns are recessed relative to the insulating layer in the second direction by a second distance.

5. The light-emitting display unit according to claim 4, wherein A ratio of the first distance to the width and a ratio of the second distance to the width are between 0.05 and 0.15, respectively.

6. The light-emitting display unit according to claim 4, wherein The first distance is greater than the second distance.

7. The light-emitting display unit according to claim 1, wherein Two adjacent ones of the plurality of contact pad patterns arranged in the first direction have a first distance and a second distance, the first distance being adjacent to an edge of the insulating layer relative to the second distance, and the first distance being greater than the second distance.

8. The light-emitting display unit of claim 1, wherein, A ratio of a thickness to a width of the light emitting display unit is between 0.3 and 1.

9. The light-emitting display unit according to claim 1, wherein In a cross-sectional view, the plurality of electrode patterns have a first thickness, the plurality of contact pad patterns have a second thickness, and the insulating layer has a third thickness, the first and second thicknesses being less than the third thickness, respectively.

10. The light-emitting display unit according to claim 1, wherein The plurality of electrode patterns comprise first, second, and third electrode patterns separated from each other, the plurality of contact pad patterns comprise first, second, and third contact pad patterns separated from each other, and a projection of the second electrode pattern onto the plurality of contact pad patterns overlaps the first, second, and third contact pad patterns.

11. The light-emitting display unit according to claim 10, wherein The ratio of the overlapping area of the normal projection of the second electrode pattern on the plurality of contact pad patterns and the first contact pad pattern or the third contact pad pattern to the area of the first contact pad pattern or the third contact pad pattern is less than 0.

1.

12. A light emitting display unit, characterized by Comprising: a redistribution layer including a plurality of electrode patterns, a plurality of contact pad patterns, an insulating layer, and a plurality of conductive vias, the insulating layer is disposed between the plurality of electrode patterns and the plurality of contact pad patterns, the plurality of conductive vias are disposed within the insulating layer and electrically connect the plurality of electrode patterns and corresponding plurality of contact pad patterns; and a plurality of micro light emitting elements disposed on the redistribution layer and electrically connected to the plurality of electrode patterns, and part of the insulating layer is exposed between the plurality of micro light emitting elements, wherein the light emitting display unit has a first length in a first direction, and a second length of the insulating layer exposed between the plurality of micro light emitting elements in the first direction is less than 50% of the first length, and in the first direction, the insulating layer is overlapped with at least one of the plurality of electrode patterns and the plurality of contact pad patterns from the center line to the edge of the light emitting display unit.

13. A display device, characterized by comprising: Comprising: a driving substrate including a plurality of contact pads; and a plurality of light emitting display units electrically connected to the driving substrate through the plurality of contact pads, each of the plurality of light emitting display units includes: a redistribution layer including a plurality of electrode patterns, a plurality of contact pad patterns, an insulating layer, and a plurality of conductive vias, the insulating layer is disposed between the plurality of electrode patterns and the plurality of contact pad patterns, the plurality of conductive vias are disposed within the insulating layer and electrically connect the plurality of electrode patterns and corresponding plurality of contact pad patterns, the plurality of electrode patterns are electrically independent of each other, wherein adjacent two of the plurality of electrode patterns have a first gap, and adjacent two of the plurality of contact pad patterns corresponding to the adjacent two of the plurality of electrode patterns have a second gap, the first gap and the second gap have a first length and a second length in a first direction, respectively, and the third length of the overlapping area of the normal projection of the first gap on the plurality of contact pad patterns and the plurality of contact pad patterns in the first direction is less than or equal to the second length of the second gap in the first direction; and a plurality of micro light emitting elements disposed on the redistribution layer and electrically connected to the plurality of electrode patterns.

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