TWI683416B - Light-emitting device substrate - Google Patents

Abstract

A light-emitting device substrate includes a substrate, a plurality of first signal lines and a plurality of second signal lines disposed on the substrate, where the first signal line and the second signal line define a sub-pixel area, and a plurality of micro light-emitting devices respectively disposed in the sub-pixel area. The first signal line is parallel to a first direction, and the second signal line is parallel to a second direction. Each of the micro light-emitting device includes a first light-emitting diode and a second light-emitting diode. Each of the first light-emitting diode and the second light-emitting diode includes a first electrode and a second electrode respectively. The first light-emitting diode has a first long axis extending direction, and the second light-emitting diode has a second long axis extending direction. The first long axis extending direction and the second long axis extending direction deviate from the first direction or the second direction. A first angle θ _Ais between the first long axis extending direction and the second long axis extending direction.

Description

Light-emitting element substrate

The present invention relates to a substrate, and particularly to a light-emitting element substrate.

With the advancement of technology, light-emitting diodes have become common and widely used in various fields. As a light source, light-emitting diodes have many advantages, including low energy consumption, long service life, and fast switching speed. Therefore, traditional light sources have been gradually replaced by light-emitting diodes.

In addition to being a light source, light-emitting diodes have also been used in the display field. For example, a miniature light-emitting diode display using a miniature light-emitting diode as a display element. However, the current miniature light-emitting diode display has the problem of uneven color and brightness due to the process tolerance and the light emitting directivity of the diode. In addition, in order to improve the resolution and increase the signal routing, optical diffraction or periodic distribution of brightness may also appear, resulting in uneven brightness and color purity.

The invention provides a light-emitting element substrate, which can improve uneven brightness and color purity and improve display quality.

The light-emitting element substrate of the present invention includes a substrate, a plurality of first signal lines and a plurality of second signal lines, which are alternately arranged on the substrate. The first signal line and the second signal line define a plurality of sub-pixel areas, and a plurality of Each micro light-emitting element is respectively arranged in the sub-pixel area, and each sub-pixel area has a micro-light-emitting element. The first signal line is parallel to the first direction, and the second signal line is parallel to the second direction. The first direction and the second direction are perpendicular to each other. The miniature light emitting element includes a first light emitting diode and a second light emitting diode. Each of the first light-emitting diode and the second light-emitting diode includes a first electrode and a second electrode. The first light-emitting diode has a first long-axis extension direction, and the second light-emitting diode has a second long-axis extension direction. Both the first long axis extension direction and the second long axis extension direction deviate from the first direction or the second direction, and a first angle θ _A is interposed between the first long axis extension direction and the second long axis extension direction.

Based on the above, in the light-emitting element substrate of an embodiment of the present invention, since the first long-axis extending direction of the first light-emitting diode and the second long-axis extending direction of the second light-emitting diode are both deviated from the first direction or the second direction , And a first angle is included between the extending direction of the first long axis and the extending direction of the second long axis. Therefore, the first light-emitting diode and the second light-emitting diode are arranged not parallel to the signal line or not parallel to each other. As a result, the arrangement directions of the micro light-emitting elements (including the first light-emitting diode and the second light-emitting diode) are not uniform, and the configuration of the micro-light-emitting elements on the substrate relative to these The disorder of the arrangement of the signal lines may slightly change the structure's regular reflection of the light from these micro light-emitting elements, so it can be Reduce the displacement or rotation caused by the transposition tolerance, resulting in uneven color or/and brightness, so as to further improve the display quality of the light emitting element substrate.

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.

10A, 10B, 10C, 10D, 10E

100‧‧‧ substrate

200‧‧‧mini light-emitting element

200A, 200E‧‧‧First LED

200B, 200D‧‧‧‧second LED

200C‧‧‧The third light-emitting diode

210‧‧‧First electrode

220‧‧‧Second electrode

300‧‧‧Light-shielding layer

310‧‧‧Main part

320, 320A‧‧‧Bending Department

321、321A‧‧‧The first branch

322, 322A‧‧‧Second branch

D1‧‧‧First direction

D2‧‧‧Second direction

D3‧‧‧third direction

D4‧‧‧ Fourth direction

SL1‧‧‧First signal line

SL2‧‧‧Second signal line

L1, L1” ‧‧‧ Extension direction of the first long axis

L2, L2” ‧‧‧ Extension direction of the second long axis

L3‧‧‧Extending direction of the third long axis

PX‧‧‧Sub-pixel area

PX1‧‧‧The first pixel area

PX2‧‧‧Second sub-pixel area

W1‧‧‧ First distance

W2‧‧‧Second distance

θ ₁ , θ ₁ ”‧‧‧ First angle

θ ₂ , θ ₂ ”‧‧‧Second included angle

θ ₃ ‧‧‧ third angle

θ ₄ ‧‧‧ fourth angle

θ ₅ ‧‧‧ fifth angle

θ _A , θ _A ”‧‧‧ First angle

FIG. 1 is a schematic partial top view of a light-emitting device substrate according to an embodiment of the invention.

2 is a schematic partial top view of a light-emitting device substrate according to another embodiment of the invention.

FIG. 3 is a schematic partial top view of a light-emitting device substrate according to another embodiment of the invention.

4 is a schematic partial top view of a light-emitting device substrate according to another embodiment of the invention.

FIG. 5 is a schematic partial top view of a light-emitting device substrate according to another embodiment of the invention.

In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. Throughout the specification, the same reference numerals denote the same elements. It should be understood that when an element such as a layer, film, region or substrate is referred to as another element" When “on” or “connected to” another element, it may be directly on or connected to another element, or an intermediate element may also be present. On the contrary, when an element is referred to as being “directly on another element” or "When directly connected to" another element, there is no intermediate element. As used herein, "connected" may refer to physical and/or electrical connections. Furthermore, "electrically connected" or "coupled" may be two There are other components between the components.

It should be understood that although the terms "first", "second", "third", etc. may be used herein to describe various elements, components, regions, layers, and/or sections, these elements, components, regions, and/or Or part should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Accordingly, "first element", "component", "region", "layer" or "portion" discussed below may be referred to as a second element, component, region, layer or section without departing from the teachings herein.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology and the present invention, and will not be interpreted as idealized or excessive Formal meaning unless explicitly defined as such in this article.

FIG. 1 is a schematic partial top view of a light-emitting element substrate according to a first embodiment of the present invention. For convenience of explanation and observation, FIG. 1 only schematically shows some components. Please refer to FIG. 1. In this embodiment, the light-emitting device substrate 10A includes a substrate 100, a plurality of first signal lines SL1 and a plurality of second signal lines SL2 interlaced with each other on the substrate On 100, the first signal lines SL1 and the second signal lines SL2 define a plurality of SL sub-pixel regions PX, and a plurality of micro light-emitting devices 200 are respectively disposed in the sub-pixel regions PX.

In this embodiment, the substrate 100 is, for example, an array substrate. The material of the substrate 100 may be glass, quartz, organic polymer, or other applicable materials. In some embodiments, an insulating layer (not shown) may be covered on the substrate 100, but the invention is not limited thereto. In this embodiment, a plurality of first signal lines SL1 and second signal lines SL2 can be selectively provided on the substrate 100. The first signal line SL1 and the second signal line SL2 may be located in different layers and interlace with each other, but the invention is not limited thereto. For example, the first signal line SL1 and the second signal line SL2 may be data lines or scanning lines, respectively. In other embodiments, the first signal line SL1 or the second signal line SL2 may also be selectively a reference voltage line (not shown) or a power line; or alternatively, the first signal line SL1 and the second signal line SL2 is separately from the data line or the scanning line, and multiple reference voltage lines (not shown) or power lines (not shown) are additionally provided, but the invention is not limited thereto. In this embodiment, for example, the first signal line SL1 parallel to the first direction D1 is a data line, the second signal line SL2 parallel to the second direction D2 is a scan line, and the first direction D1 and the second direction D2 are perpendicular to each other. In other words, the extending direction of the first signal line SL1 is substantially perpendicular to the second signal line SL2. Based on conductivity considerations, metal materials are generally used for the first signal line SL1 and the second signal line SL2, but the invention is not limited thereto. In other embodiments, the first signal line SL1 and the second signal line SL2 may also use other conductive materials, such as alloys, nitrides of metal materials, oxides of metal materials, oxynitrides of metal materials, or metal materials. With other guides Stacked layers of electrical materials.

In this embodiment, multiple first signal lines SL1 and multiple second signal lines SL2 may define multiple sub-pixel areas PX. Specifically, each two adjacent first signal lines SL1 and each two adjacent second signal lines SL2 may define a sub-pixel area PX. The sub-pixel area PX is, for example, an area on the substrate 100 divided into a plurality of small areas by using the first signal line SL1 and the second signal line SL2 as dividing lines. The small areas of these repeating units are the sub-pixel areas PX.

In this embodiment, the micro light-emitting element 200 is disposed in the sub-pixel area PX, and each sub-pixel area PX has a plurality of micro light-emitting elements 200, but the invention is not limited thereto. In this embodiment, the micro light-emitting device 200 includes a first light-emitting diode 200A and a second light-emitting diode 200B, but the invention is not limited thereto. The first light-emitting diode 200A and the second light-emitting diode 200B each include a first electrode 210 and a second electrode 220.

In detail, in this embodiment, the micro light-emitting element 200 is, for example, a micro light-emitting diode (microLED) or a millimeter-type light-emitting diode (generally refers to a light-emitting diode whose side length of the light-emitting diode is less than 1 mm long) ). The micro light-emitting device 200 includes a light-emitting layer and N-type doped semiconductor layers and P-type doped semiconductor layers (not shown) located on both sides of the light-emitting layer. In some embodiments, the material of the N-type doped semiconductor layer or the P-type doped semiconductor layer includes, for example, gallium nitride (GaN), indium gallium nitride (InGaN), gallium arsenide (GaAs), or other IIIA group It is a material composed of VA group elements or other suitable materials, but the invention is not limited thereto. The light emitting layer has, for example, quantum wells (Quantum Well, QW), for example: single quantum well (SQW), multiple quantum wells (MQW) or other quantum wells, the holes provided by the P-type doped semiconductor layer and the electrons provided by the N-type doped semiconductor layer can combine in the light-emitting layer and release energy in the light mode. In some embodiments, the material of the light-emitting layer includes, for example, gallium nitride (GaN), indium gallium nitride (InGaN), gallium arsenide (GaAs), aluminum gallium indium phosphide (AlGaInP), indium aluminum gallium arsenide (InAlGaAs ) Or other IIIA and VA group elements or other suitable materials.

In this embodiment, the first electrode 210 is electrically connected to the P-type doped semiconductor layer, and the second electrode 220 is electrically connected to the N-type doped semiconductor layer, but the invention is not limited thereto. In this embodiment, the first electrode 210 is, for example, a positive electrode, and the second electrode 220 is, for example, a negative electrode, but the invention is not limited thereto. In consideration of conductivity, metal materials are generally used for the first electrode 210 and the second electrode 220, but the invention is not limited thereto. In other embodiments, the first electrode 210 and the second electrode 220 may also use other conductive materials, such as alloys, nitrides of metal materials, oxides of metal materials, oxynitrides of metal materials, or other materials Stacked layers of conductive material.

In this embodiment, a plurality of driving elements (not shown) may be selectively disposed on the substrate 100, and each driving element is electrically connected to the first signal line SL1 or the second signal line SL2 and the micro light-emitting element. 200 to provide a driving signal to the micro light-emitting device 200. The driving element is, for example, a bottom gate thin-film transistor (Bottom Gate-TFT), a top gate thin-film transistor (Top Gate-TFT), or directly controlled by a microchip control circuit, but the invention is not limited thereto.

It is worth noting that the first light-emitting diode 200A located in the sub-pixel area PX has a first long-axis extension direction L1, the second light-emitting diode 200B has a second long-axis extension direction L2, and the first long axis Both the extending direction L1 and the second long-axis extending direction L2 deviate from the first direction D1 or the second direction D2. For example, the long-axis direction refers to the direction in which the first light-emitting diode 200A and the second light-emitting diode 200B extend in the shape of the substrate 100 in the direction perpendicular to the projection direction, or the first light-emitting diode The axial extension direction between the first electrode 210 and the second electrode 220 of the body 200A and the second light-emitting diode 200B. _A first angle θ _A is interposed between the first long-axis extending direction L1 and the second long-axis extending direction L2. Under the above-mentioned design, the plurality of micro light-emitting elements 200 (including the first light-emitting diode 200A and the second light-emitting diode 200B) in each sub-pixel area PX can be arranged in a manner not parallel to the signal lines SL1 and SL2 And the first light-emitting diode 200A and the second light-emitting diode 200B are not parallel to each other. In this way, during the transposition process, the displacement or direction tolerance of the micro light-emitting element 200 transposed onto the substrate 100 can be set to reduce the accumulation and addition of the variation. Specifically, since the long axis extension directions L1 and L2 of the micro light emitting elements 200 are arranged in a manner not parallel to the first signal line SL1 or the second signal line SL2, some micro light emitting elements 200 are generated during the transposition process The displacement or rotation in the direction will not appear abrupt. In other words, the arrangement directions of the micro light-emitting elements 200 in the sub-pixel area PX of this embodiment are not consistent. In this way, the oblique arrangement can increase the disorder of the arrangement of the micro light-emitting elements 200 on the substrate 100 relative to the signal lines SL1 and SL2 or slightly change the structure to reflect the light of the micro-light emitting elements 200 regularly. Degree, so that the overall brightness uniformity is not easily affected by the transposition tolerance. Under the above design, the light-emitting element substrate 10A of this embodiment can reduce the color and brightness unevenness caused by the misalignment of a few micro-light-emitting elements 200 due to transposition tolerances, thereby improving the display of the light-emitting element substrate 10A quality.

Please refer to FIG. 1. In this embodiment, the first light-emitting diodes 200A are arranged in a plurality of rows, and the second light-emitting diodes 200B are arranged in a plurality of rows. For example, as shown in FIG. 1, the first light-emitting diodes 200A are arranged in multiple columns of first light-emitting diodes 200A along the second direction D2, and the second light-emitting diodes 200B are along the second The second light-emitting diodes 200B are arranged in multiple rows in the direction D2. The plurality of second light-emitting diodes 200B are arranged at intervals from the plurality of first light-emitting diodes 200A. For example, as shown in FIG. 1, a row of second light-emitting diodes 200B is interposed between two rows of first light-emitting diodes 200A adjacent to each other, but the invention is not limited thereto.

θ₁

75°。第二發光二極體200B的第二長軸延伸方向L2與第一方向D1之間具有第二夾角θ₂，第二夾角θ₂的角度為15°

θ₂

75°。在上述的設計下，第一發光二極體200A及第二發光二極體200B可以偏離第一方向D1或第二方向D2，具體而言，第一發光二極體200A及第二發光二極體200B可以偏離第一訊號線SL1或第二訊號線SL2的延伸方向。如此，當第一夾角θ₁及第二夾角θ₂的角度在上述範圍中時，微型發光元件200(包括第一發光二極體200A及第二發光二極體200B)不容易因轉置公差所產 生的位移或旋轉，而影響到整體微型發光元件200以偏離訊號線SL1、SL2的延伸方向設置。因此，發光元件基板10A可以更顯著地減少因轉置公差的位移或旋轉所產生的色彩及亮度不均，使發光元件基板10A具有更佳的顯示品質。 In this embodiment, the first long axis extending direction L1 of the first light emitting diode 200A has a first included angle θ ₁ between the first direction D1, and the angle of the first included angle θ ₁ is 15°

θ ₁

75°. The second long axis extending direction L2 of the second light emitting diode 200B has a second included angle θ ₂ between the first direction D1, and the angle of the second included angle θ ₂ is 15°

θ ₂

75°. Under the above design, the first light-emitting diode 200A and the second light-emitting diode 200B may deviate from the first direction D1 or the second direction D2, specifically, the first light-emitting diode 200A and the second light-emitting diode The body 200B may deviate from the extending direction of the first signal line SL1 or the second signal line SL2. As such, when the angles of the first included angle θ ₁ and the second included angle θ ₂ are within the above range, the micro light-emitting element 200 (including the first light-emitting diode 200A and the second light-emitting diode 200B) is not easily tolerated by transposition tolerance The resulting displacement or rotation affects the overall miniature light-emitting device 200 to deviate from the extending direction of the signal lines SL1, SL2. Therefore, the light-emitting element substrate 10A can more significantly reduce color and brightness unevenness caused by displacement or rotation of the transposition tolerance, so that the light-emitting element substrate 10A has better display quality.

θ_A

150°。在上述的設計下，第一發光二極體200A及第二發光二極體200B的長軸延伸方向L1、L2彼此不平行，具體而言，第一發光二極體200A及第二發光二極體200B是以彼此不平行的方式設置於子畫素區PX中。如此，當第一角度θ_A的角度在上述的範圍時，第一發光二極體200A及第二發光二極體200B的設置方向可不一致，不容易受到轉置公差的影響。因此，發光元件基板10A可以更顯著地減少色彩及亮度不均的產生，使發光元件基板10A具有更佳的顯示品質。 In this embodiment, a first angle θ _{A is} interposed between the first long axis extension direction L1 and the second long axis extension direction L2, and the angle of the first angle θ _A is 30°

θ _A

150°. Under the above design, the long-axis extension directions L1 and L2 of the first light-emitting diode 200A and the second light-emitting diode 200B are not parallel to each other. Specifically, the first light-emitting diode 200A and the second light-emitting diode The volume 200B is arranged in the sub-pixel area PX in a manner not parallel to each other. In this way, when the angle of the first angle θ _A is within the above range, the installation directions of the first light-emitting diode 200A and the second light-emitting diode 200B may be different, and it is not easily affected by the transposition tolerance. Therefore, the light-emitting element substrate 10A can more significantly reduce the occurrence of color and brightness unevenness, so that the light-emitting element substrate 10A has better display quality.

In this embodiment, the angles of the first included angle θ ₁ and the second included angle θ ₂ may be the same, but the invention is not limited thereto. In some embodiments, the angles of the first included angle θ ₁ and the second included angle θ ₂ of the micro light-emitting elements 200 in the same sub-pixel area PX may be different, or the micro light-emitting elements in the same sub-pixel area PX The angles of the first included angle θ ₁ and the second included angle θ ₂ of 200 may be the same, but compared to different sub-pixel regions PX, the angles of the first included angle θ ₁ and the second included angle θ ₂ of these micro light emitting elements 200 may be They are different (as shown in FIG. 3), but the invention is not limited thereto.

Please refer to FIG. 1, each micro light-emitting device 200 is electrically connected (not shown) to the corresponding first signal line SL1 or second signal line SL2. In this embodiment, the first electrode 210 of the first light-emitting diode 200A in the same sub-pixel area PX is adjacent to the first electrode 210 of the second light-emitting diode 200B. In this embodiment, when the angles of the first included angle θ ₁ and the second included angle θ ₂ are the same, the first light-emitting diode 200A and the second light-emitting diode 200B in the same sub-pixel area PX are mutually Mirror configuration or symmetric configuration. Under the above design, two adjacent first electrodes 210 in the same sub-pixel area PX may share the same wiring (for example, a common electrode line or power supply line), and these in the adjacent sub-pixel area PX The micro light-emitting device 200 (for example, the two first light-emitting diodes 200A in the adjacent sub-pixel regions PX) may also share the same traces or signal lines SL1 and SL2, respectively. In this way, the distance of the wiring can be shorter, the installation can have more margin, and the wiring space can be saved, thereby increasing the aperture ratio of the light-emitting element substrate 10A and improving the resolution and display quality.

In short, in the light-emitting element substrate 10A of this embodiment, both the first long-axis extension direction L1 of the first light-emitting diode 200A and the second long-axis extension direction L2 of the second light-emitting diode 200B deviate from the first direction D1 or the second direction D2, and a first angle θ _A is interposed between the first long-axis extending direction L1 and the second long-axis extending direction L2. Therefore, the first light-emitting diode 200A and the second light-emitting diode 200B are arranged not parallel to the signal lines SL1, SL2 or not parallel to each other. As a result, the arrangement directions of these micro-light-emitting devices 200 (including the first light-emitting diode 200A and the second light-emitting diode 200B) are not uniform, which can reduce the displacement and rotation caused by the transposition tolerance. The brightness is uneven to further improve the display quality of the light-emitting element substrate 10A. In addition, when the first light-emitting diode 200A and the second light-emitting diode 200B are arranged in a manner not parallel to the signal lines SL1 and SL2 (for example, in an oblique manner), the light generated by these micro-light-emitting elements 200 is relatively It is not easy to produce fixed interference or diffraction phenomenon with the signal lines SL1 and SL2, and it can avoid the ripple caused by the periodic distribution of the brightness, thereby causing the problem of uneven brightness and color purity.

It must be noted here that the following embodiments follow the element numbers and partial contents of the foregoing embodiments, wherein the same reference numerals are used to indicate the same or similar elements. For the description of the parts that omit the same technical contents, refer to the foregoing embodiments. Details are not repeated in the following embodiments.

2 is a schematic partial top view of a light-emitting device substrate according to another embodiment of the invention. For convenience of description and observation, FIG. 2 only schematically shows some components. The main difference between the light-emitting element substrate 10B of this embodiment and FIG. 1 is that the micro-light-emitting elements 200 in each sub-pixel area PX include more than two micro-light-emitting elements 200. For example, the number of the micro light-emitting elements 200 in each sub-pixel area PX may be three, four, five, or more according to user needs, but the invention is not limited thereto. The sub-pixel area PX of this embodiment is described by including three miniature light-emitting elements 200 (for example, including two first light-emitting diodes 200A and one second light-emitting diode 200B), but the art has Generally, a person skilled in the art should understand that the total number of micro light-emitting elements 200 or the respective numbers of first light-emitting diodes 200A and one second light-emitting diode 200B are not limited thereto. In this way, the brightness of the light-emitting element substrate 10B can be further increased and the resolution and display quality can be improved.

FIG. 3 is a schematic partial top view of a light-emitting device substrate according to another embodiment of the invention. For convenience of description and observation, FIG. 3 only schematically shows some components. 2 and 3, the light-emitting element substrate 10C of this embodiment is similar to the light-emitting element substrate 10B of FIG. 2, the main difference is that the sub-pixel areas PX further include the first sub-pixel area PX1 and the second Sub pixel area PX2. For example, as shown in FIG. 3, the first sub-pixel area PX1 and the second sub-pixel area PX2 are two adjacent left and right sub-pixel areas PX, but the invention is not limited thereto. In some embodiments, the first sub-pixel area PX1 and the second sub-pixel area PX2 may also be any two of the multiple sub-pixel areas PX that are not adjacent. The second sub-pixel area PX2 includes a third light-emitting diode 200C, and the third light-emitting diode 200C has a third long-axis extension direction L3. The third long axis extension direction L3 deviates from the first direction D1 and has a third angle θ ₃ with the first direction D1. In this embodiment, the angle of the first included angle θ ₁ of the first light emitting diodes 200A located in the same column is different from the angle of the third included angle θ ₃ of the third light emitting diodes 200C. In other words, the extension direction L1 of the first long axis of the first light-emitting diode 200A in the first sub-pixel area PX1 is not parallel to the third long axis of the third light-emitting diode 200C in the second sub-pixel area PX2 Extension direction L3. In this embodiment, the angle of the first included angle θ ₁ is greater than the angle of the third included angle θ ₃ , but the invention is not limited thereto. The angle of the third included angle θ ₃ is also different from the angle of the second included angle θ ₂ . In addition, the angle of the first included angle θ ₁ of the first light emitting diode 200A in the second sub-pixel area PX2 may also be different from the third included angle θ _{3 of the} third light emitting diode 200C. In other words, the angles of the included angles of the plurality of light emitting diodes in the sub-pixel region may be uniform or inconsistent. The included angles θ _1, θ ₂ , and θ ₃ of the light-emitting diodes 200A, 200B, and 200C in the adjacent sub-pixel regions PX1 and PX2 may also be consistent or inconsistent, and the present invention is not limited thereto. If the selection of the first included angle θ ₁ , the second included angle θ ₂ and the third included angle θ ₃ tends to be inconsistent, the main reason is that the color and brightness unevenness caused by the displacement or rotation of the transposition tolerance can be further improved In this way, the optical symmetry and uniformity of the light-emitting element substrate 10C can be further improved, the occurrence of color and brightness unevenness can be reduced, and the display quality of the light-emitting element substrate 10C can be improved.

4 is a schematic partial top view of a light-emitting device substrate according to another embodiment of the invention. For convenience of description and observation, FIG. 4 only schematically shows some components. Please refer to FIGS. 1 and 4. The light-emitting element substrate 10D of this embodiment is similar to the light-emitting element substrate 10A of FIG. 1. The main difference is that the light-emitting element substrate 10D further includes a light-shielding layer 300. For example, the light shielding layer 300 includes a plurality of body parts 310 and a plurality of bending parts 320. The bent portion 320 connects the adjacent main body portions 310, and each bent portion 320 includes a first branch 321 and a second branch 322 connected to each other. The first branch 321 extends along the third direction D3, and the second branch 322 extends along the fourth direction D4. In this embodiment, the bent portions 320 are all bent in the same direction (for example, to the right of the second direction D2 in FIG. 4 ), but the invention is not limited thereto. There is a fourth included angle θ ₄ between the first branch 321 and the second branch 322.

θ₃

150°。各彎折部320與重疊的各第一訊號線SL1或第二訊號線SL2形成第五夾角θ₅，第五夾角θ₅的角度為15°

θ₄

75°。在上述的設計下，第一發光二極體200A與第二發光二極體200B沿第二方向D2上位於彎折部320之間。藉此，遮光層300可以改善以高密度設置的訊號線SL1、SL2或其他一致性且重複性高的走線所產生的光學狹縫現象，並降低微型發光元件200因出光指向性所造成的色彩及亮度不均。因此，遮光層300可同時具有良好的遮光效果，並減少亮度不均及混色所造成的色純度不均，以提升微型發光元件200的出光效率及發光元件基板10D的顯示品質。 It is worth noting that, in this embodiment, each of the main body parts 310 overlaps one of the corresponding first signal line SL1 or the corresponding second signal line SL2. Each bending portion 320 partially overlaps the corresponding one of the first signal line SL1 or the second signal line SL2. For example, each main body 310 of this embodiment overlaps each second signal line SL2 in alignment, and the orthographic projection area of each main body 310 in plan view completely covers the orthographic projection area of each second signal line SL2 in plan view. The orthographic projection area of the first branch 321 and the second branch 322 of each bending portion 320 in plan view partially covers the orthographic projection area of the corresponding first signal line SL1 in plan view, but the invention is not limited thereto. The angle of the fourth included angle θ ₄ is 30°

θ ₃

150°. Each bending portion 320 and the overlapping first signal line SL1 or second signal line SL2 form a fifth angle θ ₅ , and the angle of the fifth angle θ ₅ is 15°

θ ₄

75°. Under the above design, the first light-emitting diode 200A and the second light-emitting diode 200B are located between the bent portions 320 along the second direction D2. In this way, the light-shielding layer 300 can improve the optical slit phenomenon caused by the signal lines SL1, SL2 or other uniform and highly repeatable traces arranged at a high density, and reduce the light-emitting element 200 caused by the light directivity Uneven color and brightness. Therefore, the light-shielding layer 300 can have a good light-shielding effect and reduce unevenness in color purity caused by uneven brightness and color mixing, so as to improve the light-emitting efficiency of the micro light-emitting element 200 and the display quality of the light-emitting element substrate 10D.

In this embodiment, the fifth included angle θ ₅ includes multiple included angles, such as the included angle between the first branch 321 and the overlapped first signal line SL1 or the included angle between the second branch 322 and the overlapped first signal line SL1 . In the present embodiment, the angle [theta] between the fifth angle [theta] ₅ of the fifth branch 321 between the first signal line SL1 and the first and the second branch 322 overlaps the first signal line SL1 may overlap angle ₅ The same, but the invention is not limited to this. In some embodiments, the angle between the fifth angle θ ₅ formed by the first branch 321 and the overlapping first signal line SL1 may also be the fifth angle θ formed by the second branch 322 and the overlapping first signal line SL1 The angle of ₅ is different. In other words, in some embodiments, the slope of the first branch 321 or the second branch 322 may be different from each other, but the invention is not limited thereto. In other embodiments, the fifth included angle θ _{5 of the} adjacent first branch 321 or second branch 322 may also be the same or different from each other, and the invention is not limited thereto.

Please continue to refer to FIG. 4. In this embodiment, the angle between the fourth angle θ ₄ and the first angle θ _A is the same, and the first angle θ _A and the fourth angle θ _{4 are} directed in opposite directions. For example, the first angle θ _A and the fourth included angle θ ₄ are respectively bent along opposite sides in the second direction D2. Within the range of the fourth included angle θ ₄ and the fifth included angle θ ₅ , the micro light-emitting device 200 may be disposed between the adjacent bent portions 320 so as to be inclined to the signal lines SL1 and SL2.

In this embodiment, the third direction D3 is parallel to the second long axis extension direction L2, and the fourth direction D4 is parallel to the first long axis extension direction L1. The first long axis extending direction L1 of the first light emitting diode 200A staggers the corresponding extending direction of the adjacent first branch 321 (for example, the third direction D3). The second long axis extending direction L2 of the second light emitting diode 200B staggers the corresponding extending direction of the adjacent second branch 322 (for example, the fourth direction D4). Under the above design, the micro light-emitting element 200 is not parallel to the corresponding adjacent branch, but is disposed between the adjacent bending portions 320 at an oblique angle to the corresponding first branch 321 or second branch 322. In this way, in addition to reducing the unevenness of color and brightness of the micro light-emitting element 200, the light-shielding layer 300 can also have a good light-shielding effect, and improve the light-emitting efficiency of the micro light-emitting element 200 and the display quality of the light-emitting element substrate 10D.

In this embodiment, the distance between every two adjacent bending portions 320 is the same or different. In this embodiment, different distances are used as examples, but the present invention is not limited to this. As shown in FIG. 4, the distance between adjacent bent portions 320 includes, for example, a first distance W1 or a second distance W2. The length of the first distance W1 is greater than the length of the second distance W2. Under the above design, the opening between every two bending portions 320 The area (not marked) can be different. In other words, the aperture ratio of adjacent sub-pixel regions PX may be different. In this way, the light shielding layer 300 can further improve the optical slit phenomenon. Therefore, the light-shielding layer 300 can have a good light-shielding effect and reduce the occurrence of uneven brightness and color purity, so as to improve the light-emitting efficiency of the micro light-emitting element 200 and the display quality of the light-emitting element substrate 10D.

FIG. 5 is a schematic partial top view of a light emitting device substrate according to still another embodiment of the invention. For convenience of description and observation, FIG. 5 only schematically shows some components. 4 and 5, the light-emitting element substrate 10E of this embodiment is similar to the light-emitting element substrate 10D of FIG. 4, the main difference is that the bending portion includes a plurality of bending portions 320, 320A, and adjacent bending portions 320 and 320A are respectively bent along opposite sides in the second direction D2, and the first long axis of the micro light-emitting element 200 (including the first light-emitting diodes 200A and 200E and the second light-emitting diodes 200B and 200D) The extension direction L1" is not parallel to the fourth direction D4, and the second long axis extension direction L2" is not parallel to the third direction D3.

In this embodiment, the first branch 321A corresponds to the first branch 321, and the first branch 321A extends along the fourth direction D4, the second branch 322A corresponds to the second branch 322, and the second branch 322A follows the third direction D3 extend. The plurality of first light-emitting diodes 200A, 200E and the plurality of second light-emitting diodes 200B, 200D may be mirror-arranged, and are disposed between the corresponding bent portions 320, 320A at an oblique angle. Compared with the first included angle θ ₁ and the second included angle θ ₂ in FIG. 3, the angle between the first included angle θ ₁ and the second included angle θ ₂ is different from the first included angle θ ₁ ”and the second included angle θ ₂ ” in this embodiment Angle. Under the above design, the angle of the first angle θ _A ”is different from the angle of the fourth angle θ ₄ (for example: the angle of the first angle θ _A ” is greater than the angle of the fourth angle θ ₄ ) to further improve the optical uniformity . In this way, the light-emitting element substrate 10E can obtain technical effects similar to those of the foregoing embodiments.

In some embodiments, the bending portion 320 may also overlap each first signal line SL1 or each second signal line SL2 in alignment. In other words, the orthographic projection area of the light shielding layer 300 in plan view can completely cover the orthographic projection area of each first signal line SL1 and each second signal line SL2 in plan view, and the invention is not limited thereto.

In summary, in a light-emitting device substrate according to an embodiment of the present invention, since the first long-axis extension direction of the first light-emitting diode and the second long-axis extension direction of the second light-emitting diode both deviate from the first direction or the first Two directions, and a first angle is included between the first long axis extension direction and the second long axis extension direction. Therefore, the first light-emitting diode and the second light-emitting diode are arranged not parallel to the signal line or not parallel to each other. As a result, the arrangement directions of these micro light-emitting elements (including the first light-emitting diode and the second light-emitting diode) are not uniform. In this way, the oblique arrangement can increase the disorder of the arrangement of the micro light-emitting elements on the substrate relative to the signal lines or slightly change the structure of the regular reflection of the light of the micro light-emitting elements, so it can reduce the The displacement or rotation of the transposition tolerance produces uneven color and brightness to further improve the display quality of the light-emitting element substrate. In addition, the light-emitting element substrate further includes a light-shielding layer, and the bent portion of the light-shielding layer only partially overlaps the corresponding signal line. In this way, the micro light-emitting element can be arranged in an opening between the bent portions in a manner inclined to the signal line and the bent portion. Therefore, the light shielding layer can improve the optical slit phenomenon caused by the signal lines arranged in high density or the highly repeatable traces, and reduce the cause of the micro light-emitting device. Uneven color and brightness caused by light directivity. In addition, the light-shielding layer also has a good light-shielding effect, and can reduce uneven brightness and color purity, so as to improve the light-emitting efficiency of the micro light-emitting element and the display quality of the light-emitting element substrate.

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.

10A‧‧‧Light emitting element substrate

100‧‧‧ substrate

200‧‧‧mini light-emitting element

200A‧‧‧First LED

200B‧‧‧Second LED

210‧‧‧First electrode

220‧‧‧Second electrode

D1‧‧‧First direction

D2‧‧‧Second direction

SL1‧‧‧First signal line

SL2‧‧‧Second signal line

L1‧‧‧Extending direction of the first long axis

L2‧‧‧Extending direction of the second long axis

PX‧‧‧Sub-pixel area

θ ₁ ‧‧‧ First angle

θ ₂ ‧‧‧Second included angle

θ _A ‧‧‧ first angle

Claims (15)

A light-emitting device substrate includes: a substrate; a plurality of first signal lines and a plurality of second signal lines, which are interlaced on the substrate, the first signal lines are parallel to a first direction, and the second signals The line is parallel to a second direction, the first direction and the second direction are perpendicular to each other, the first signal lines and the second signal lines define a plurality of sub-pixel areas; and a plurality of micro light-emitting devices, respectively In the sub-pixel areas, and each of the sub-pixel areas has the micro-light-emitting elements, the micro-light-emitting elements include a first light-emitting diode and a second light-emitting diode, each of the first A light emitting diode and a second light emitting diode include a first electrode and a second electrode, wherein the first light emitting diodes have a first long axis extending direction, and the second light emitting diodes have A second long axis extension direction, both the first long axis extension direction and the second long axis extension direction deviate from the first direction or the second direction, and the first long axis extension direction and the second long axis extension There is a first angle θ _A between the directions. The light-emitting element substrate as described in item 1 of the patent application range, wherein the first light-emitting diodes are arranged in a plurality of rows, respectively, and a first included angle θ is formed between the first long axis extension direction and the first direction _1, the first angle θ ₁ is an angle 15 ° ≤θ ₁ ≤75 °. The light-emitting element substrate as described in item 2 of the patent application range, wherein the second light-emitting diodes are arranged in a plurality of rows, respectively, and spaced apart from the plurality of rows of the first light-emitting diodes, and the second the direction of the major axis extending between the first direction and having a second angle θ _2, the second angle [theta] ₂ is an angle 15 ° ≤θ ₂ ≤75 °. The light-emitting element substrate as described in item 2 of the patent application scope, wherein the sub-pixel areas further include a first sub-pixel area and a second sub-pixel area, and the second sub-pixel area includes a third A light emitting diode, the third light emitting diode has a third long axis extending direction, and a third angle θ ₃ between the third long axis extending direction and the first direction, the first light emitting diode The angle of the first included angle θ ₁ of the body is different from the angle of the third included angle θ ₃ of the third light emitting diode. The light emitting element substrate as defined in claim 1, item range, wherein the first angle θ angle _A is 30 ° ≤θ _A ≤150 °. The light-emitting element substrate as claimed in item 1 of the patent application range, wherein the at least one micro-light-emitting element in each sub-pixel area includes: at least one first light-emitting diode, and the first light-emitting diode There is a first included angle θ ₁ between a long axis extension direction and the first direction; and at least one second light emitting diode, the second long axis extension direction of the second light emitting diode and the first There is a second included angle θ ₂ between the directions, wherein the angle of the first included angle θ ₁ is 15°≤θ ₁ ≤75°, and the angle of the second included angle θ ₂ is 15°≤θ ₂ ≤75°, where the The angle between the first included angle θ ₁ and the second included angle θ ₂ is the same. The light-emitting element substrate as claimed in item 6 of the patent application range, wherein the first electrode of the first light-emitting diode is adjacent to the first electrode of the second light-emitting diode. The light-emitting element substrate as described in item 7 of the patent application range, wherein the first light-emitting diode and the second light-emitting diode are mirror-arranged with each other. The light-emitting element substrate according to Item 6 of the patent application scope further includes a light-shielding layer, the light-shielding layer includes: a plurality of main body portions; and a plurality of bent portions, connecting the adjacent body portions, each bent portion It includes a first branch and a second branch connected to each other, wherein the first branch extends along a third direction, the second branch extends along a fourth direction, and there is a between the first branch and the second branch A fourth included angle θ ₄ , wherein each of the first signal lines or the second signal lines corresponding to the main body portions is aligned and overlapped, wherein each of the bent portions partially overlaps the corresponding first signal lines Or each of the second signal lines. The light-emitting element substrate as described in item 9 of the patent application range, wherein the angle of the fourth included angle θ ₄ is 30°≦θ ₃ ≦150°. The light-emitting element substrate as described in item 9 of the patent application range, wherein the angle between the fourth angle θ ₄ and the first angle θ _A is the same, and the first angle θ _A and the fourth angle θ ₄ are opposite direction. The light-emitting element substrate as described in item 9 of the patent application range, wherein the third direction is parallel to the second long axis extension direction and the fourth direction is parallel to the first long axis extension direction. The light-emitting element substrate as described in item 9 of the patent application range, wherein the first light-emitting diode and the second light-emitting diode are located between the bent portions in the second direction. The light-emitting element substrate as claimed in item 9 of the patent application, wherein each of the bent portions and each of the overlapping first signal lines or the second signal lines form a fifth angle θ ₅ , the fifth angle θ ₅ The angle is 15°≤θ ₄ ≤75°. The light-emitting element substrate as described in item 9 of the patent application range, wherein the distance between each two adjacent bent portions is different.

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