Light emitting diode substrate and display apparatus applying the same

A light emitting diode substrate includes a substrate, a plurality of first light emitting diode and second light emitting diode. The first light emitting diode are disposed on the substrate and arranged along a first direction and a second direction to form a first array. The first light emitting diode have a first side length extending along the first direction and a second side length extending along the second direction. The second light emitting diode are disposed on the substrate and arranged along the first direction and the second direction to form a second array. The second light emitting diode have a third side length extending along the first direction and a forth side length extending along the second direction. A first difference between the first side length and the third side length is less than a second difference between the second side length and the forth side length.

BACKGROUND OF THE INVENTION

Field of the Invention

The disclosure relates to a semiconductor substrate and apparatus applying the same, and more particularly to a light emitting diode (LED) substrate and display apparatus applying the same.

Description of the Related Art

A light emitting diode display, also referred to as a micro light emitting diode display, is a display with an array of micro size light emitting diode which are picked from a light emitting diode substrate (wafer) and then integrated with a thin-film-transistor (TFT) circuit by bounding treatment to form an electrical connection and serve as pixels (sub-pixels) for the display. Because of the self-illumination properties of the light emitting diode display, the backlight module can be omitted. As a result, the light emitting diode display can be thinner and lighter, and competitive advantages can be obtained. In comparison to an organic light emitting diode (OLED) display, the light emitting diode display is more stable and has longer life time, higher brightness and shorter response time. Thus, the light emitting diode display is gradually adopted in mainstream display products of next generation.

However, it is difficult to pick the light emitting diodes from a light emitting diode substrate (wafer) and bond onto the sub-pixel array of the light emitting diode display precisely and stably, because of the following facts that since pitch of two adjacent light emitting diodes on the substrate is less than pitch of two adjacent sub-pixels of the light emitting diode display, and tools for performing these operations are merely designed in accordance with the dimension of the sub-pixel array but not considering the dimension of the light emitting diode substrate (wafer). Efficiency and robustness of the process for fabricating the light emitting diode display cannot be improved.

SUMMARY OF THE INVENTION

One disclosure relates to a light emitting diode substrate, wherein the light emitting diode substrate includes a substrate, a plurality of first light emitting diodes and a plurality of second light emitting diodes. The first light emitting diodes are disposed on the substrate and arranged in a first direction and a second direction. The first light emitting diodes have a first side length extending in the first direction and a second side length extending in the second direction. The second light emitting diodes are disposed on the substrate and arranged in the first direction and the second direction. The second light emitting diodes have a third side length extending in the first direction and a fourth side length extending in the second direction. Wherein a first difference between the first side length and the third side length is less than a second difference between the second side length and the fourth side length.

Another disclosure relates to a light emitting diode display apparatus applying the light emitting diode substrate as discussed above, wherein the light emitting diode display apparatus includes a displaying region having a first sub-pixel and a second sub-pixel. The first sub-pixel includes a first light emitting diode having a first side length and a second side length. The second sub-pixel includes a second light emitting diode having a third side length and a fourth side length. Wherein a first difference between the first side length and the third side length is less than a second difference between the second side length and the fourth side length.

In accordance with the aforementioned embodiments of the disclosure, a light emitting diode substrate and a display apparatus applying the same are provided. At least two kinds of light emitting diodes with different dimensions are formed on the light emitting diode substrate, and the dimensions and the arrangements of these at least two kinds of light emitting diodes that are formed on the light emitting diode substrate can be determined in accordance with (by cross-referencing) the design dimension of the tools used to pick up the light emitting diodes from the light emitting diode substrate and the design dimension of a sub-pixel array of the display apparatus on which the light emitting diodes are bonded. The tools to implement the process of fabricating the display apparatus thus can pick up a plurality of light emitting diodes from the light emitting diode substrate at one time and then bond the picked light emitting diodes onto the TFT sub-pixel array of the display apparatus precisely. The efficiency and robustness of the process of fabricating the light emitting diode display can be thus improved.

DETAILED DESCRIPTION OF THE INVENTION

The embodiments of the disclosure disclose a light emitting diode substrate and a display apparatus applying the same for improving the efficiency and the robustness of the process for fabricating the light emitting diode display. The above and other objects, features and advantages of the disclosure will become better understood with reference to a number of exemplary embodiments disclosed below with accompanying drawings.

It is to be understood that the specific implementations and methods disclosed below are not for the limitation of the disclosure, which can also be implemented by using other features, components, methods and parameters. The exemplary embodiments disclosed below are to exemplify the technical features of the disclosure only, not for limiting the scope of protection of the disclosure. Anyone who is disciplined in the technology field will be able to make equivalent modification and variations according to the descriptions of the specification without violating the spirit of the disclosure. For components common to different embodiments and drawings, the same numeric designations are used.

FIG. 1is a top view illustrating a light emitting diode substrate100according to one embodiment of the disclosure. The light emitting diode substrate100includes a substrate101, a plurality of first light emitting diodes102and a plurality of second light emitting diodes103. In some embodiments of the disclosure, the substrate101can be a base board allowing a thin film layer formed thereon, and the base board is made of a material selected from a group consisting of sapphire, silicon carbide (SiC), silicon (Si) (wafer), zinc oxide (ZnO), magnesium oxide (MgO), aluminum nitride (AlN), gallium nitride (GaN), glass, quartz and the arbitrary combinations thereof. In some embodiments of the disclosure, the substrate101can be a flexible board, bendable board, or a folded board made of a plastic material selected from a group consisting of poly vinyl chloride (PVC), polyethylene terephthalate (PET), polyimide (PI) and the arbitrary combinations thereof. In some embodiments of the disclosure, the substrate101can be a metal board made of a metal material selected from a group consisting of copper (Cu), Aluminum (Al), iron (Fe), steel and the arbitrary combinations thereof. The substrate101may comprises a circuit electrically connecting to a test tool that inspects the quality of light emitting diodes. The substrate101may have a circular top view profile, a rectangular top view profile or other top view profile with suitable shape for better arrangement and better space utilization.

The first light emitting diodes102and the second light emitting diodes103are formed on the substrate101by epitaxial growth or thin film deposition technologies incorporated with lithographic and etching processes. Both the first light emitting diodes102and the second light emitting diodes103may have individual unit sizes ranging from 0.1 μm to 150 μm, and preferably ranging from 0.1 μm to 20 μm. Such that, the first light emitting diodes102and the second light emitting diodes103may be referred to as micro light emitting diodes (micro size light emitting diodes). In the embodiment, the unit size is the minimum pitch (minimum repeat distance) between two identical adjacent light emitting diodes. In some embodiments, the unit size of light emitting diodes may be referred as the maximum side length or average diameter length of the light emitting diodes. The number of the first light emitting diodes102is greater than the number of the second light emitting diodes103. The first light emitting diodes102and the second light emitting diodes103may have a top view profile shaped as a rectangle, a square, a parallelogram or other regular/irregular architectures. In the embodiment, as shown inFIG. 1, the first light emitting diodes102and the second light emitting diodes103may have a top view profile that is shaped as a parallelogram (a rectangle) having a first side102aand a second side102b; and the first light emitting diodes102and the second light emitting diodes103are arranged side by side to form a first array104. In some embodiments of the disclosure, the light emitting diode substrate100can include more than one first array104, and two adjacent first arrays104may be separated by a gap. The gap between two adjacent first arrays104may be different when the two adjacent first arrays104are arranged in different directions (e.g. first direction Q1and second direction Q2).

Refer toFIG. 1, the first array104constituted by the first light emitting diodes102is a parallelogram array having a first array side104aand a second array side104b, wherein the first array side104ais connected with the second array side104b. The first array side104aextends in a first direction Q1, and the first array side104acomprises a first extending length K1. The second array side104bextends a second extending direction Q2, and the second array side104bcomprises a second extending length K2. In some embodiments, the first direction Q1may be perpendicular to the second direction Q2(so as to form an orthogonal angle). However, in some other embodiments, the first direction Q1and the second direction Q2may form an inclined angle. There are N columns of the first light emitting diodes102arranged along the second array side104bto make the first sides102aof two adjacent first light emitting diodes102parallel stood side by side; meanwhile, there are M rows of the first light emitting diodes102are arranged the first array side104ato make the second sides102bof two adjacent first light emitting diodes102stood side by side, and the first array104comprises N columns and M rows (N×M, wherein N and M are positive integers, respectively) of the first light emitting diodes102. Since the first sides102aextends in the first direction Q1and the second sides102bextends in the second direction Q2, the first extending length K1of the first array104may be M times length of the first sides102aand the second extending length K2of the first array104may be N times of the second side length of the second side102b. In the embodiment, the first side length of the first sides102ais greater than the second side length of the second side102b. Alternatively, in some other embodiment, the first side length of the first sides102amay be less than or equal to the second side length of the second side102b.

In some embodiments, the light emitting diode substrate100includes at least one second array105disposed adjacent to the first array104. Similarly, the second array105may be an N′×M′ array (wherein N′ and M′ are positive integers, respectively) constituted by N′ columns of the second light emitting diodes103and M′ rows of the second light emitting diodes103. In the embodiment, the second array105is disposed adjacent to the first array side104aof the first array104. In other embodiments, the second array105may be disposed adjacent to the second array side104bof the first array104. In the embodiment, N′ is equal to 1 (N′=1) and the M′ is equal to M (M′=M). In other embodiments, N′ and M′ may be any other sets of integers other than 1 and M. In other words, the second array105may be constituted by pluralities of columns and rows of the second light emitting diodes103. In the embodiment, the second light emitting diode103has a third side103aand a fourth side103bconnected with each other. The fourth sides103bof two adjacent second light emitting diodes103stand side by side, the third sides of the second light emitting diodes103are parallel to arrange along the first array side104ato make the third sides103aof two adjacent second light emitting diodes103stood side by side. The third sides103ahas a third side length substantially equal to the first side length of the first sides102a, and the fourth sides103bhas a fourth side length not equal to the second side length of the second sides102b. In other words, a difference between the first side length and the third side length is less than a difference between the second side length and the fourth side length. In the embodiment, the third side length of the third sides103ais greater than the fourth side length of the fourth sides103b. In other embodiments, the third side length of the third sides103amay be less than or equal to the fourth side length of the fourth sides103b. The light emitting diode substrate100may include a plurality of the first arrays104and at least one second array105may be disposed between two adjacent ones of the plurality of the first arrays104.

The first side length of the first sides102amay be substantially equal to A, and the second side length of the second sides102bmay be substantially equal to B. The first sides102aof the first light emitting diode chips102are parallel to the first array side104a, and the second sides102bof the first light emitting diode chips102are parallel to the second array side104b. The third side length of the third sides103amay be substantially equal to A, and the fourth side length of the fourth sides103bmay be substantially equal to C. The third sides103aof the second light emitting diode chips103are parallel to the first array side104a, and the fourth sides103bof the second light emitting diode chips103are parallel to the second array side104b. In the embodiment, the first light emitting diode chips102and the second light emitting diode chips103that is parallel to the first array side104a(extending in the first direction Q1) may have a side length substantially equal to A. The first light emitting diode chips102and the second light emitting diode chips103may have one side with an identical side length and another side with different side lengths. In other words, a difference between the first side length and the third side length is less than a difference between the second side length and the fourth side length.

It should note that the dimensions of the second side length of the first light emitting diode102and the fourth side length of the second light emitting diode103may not be limited to this regards. In some embodiments, the relationship between the second side length of the first light emitting diode102and the fourth side length of the second light emitting diode103may be represented by the following equation:

Wherein B is different from C, as shown inFIG. 1; B can be greater than or less than C; A can be greater than, equal to or less than B; and A can be greater than, equal to or less than C.

FIG. 2is a top view illustrating a light emitting diode substrate200according to another embodiment of the disclosure. The structure of the light emitting diode substrate200is similar to that of the light emitting diode substrate100except that there is a gap between two adjacent first light emitting diodes102or two adjacent second light emitting diodes103. The light emitting diode substrate200also includes at least one first array204and at least one second array205.

For example, there is a first gap P1between the two adjacent rows of the first light emitting diodes102perpendicular to the first array side204aof the first array204(parallel arranged in the first direction Q1); and there is a second gap P2between the two adjacent columns of the first light emitting diodes102perpendicular to the second array side204aof the first array204(parallel arranged in the second direction Q2). A gap between the first array204and the second array205substantially equal to the second gap P2. In other words, ones of the first light emitting diodes102disposed on the edge of the first array204separated from the adjacent one of the second light emitting diodes103by a gap substantially equal to the second gap P2. In some other embodiments, the distance between the first array204and the second array may be different to the second gap P2.

FIG. 3is a top view illustrating a light emitting diode substrate300according to another embodiment of the disclosure. The structure of the light emitting diode substrate300is similar to that of the light emitting diode substrate100except the light emitting diode substrate300further includes a plurality of third light emitting diodes301and at least one fourth light emitting diode chip302. The third light emitting diodes301and the at least one fourth light emitting diode302have a unit size substantially ranging from 0.1 μm to 150 μm, and preferably ranging from 0.1 μm to 20 μm. The third light emitting diodes301and the at least one fourth light emitting diode302can be also referred to as micro light emitting diodes (micro size light emitting diodes). In the embodiment, the number of the first light emitting diodes102is substantially greater than the number of the second light emitting diodes, the third light emitting diodes301or the at least one fourth light emitting diode302respectively.

Third light emitting diodes301and the at least one fourth light emitting diode302are also formed on the substrate101by epitaxial growth or thin film deposition technologies incorporated with lithographic and etching processes. In the embodiment, a third array306constituted by the third light emitting diodes301is disposed adjacent to the first array304. The third array306can be an N″×M″ array (wherein N″ and M″ are positive integers, respectively) constituted by N″ columns of the third light emitting diodes301and M″ rows of the third light emitting diodes301. In the embodiment, the third array306is disposed adjacent to the second array side304bof the first array304. In other embodiments, the third array306may be disposed adjacent to the first array side304aof the first array304. In the embodiment, N″ is equal to 1 (N″=1) and the M″ is equal to M (M″=M). In other embodiments, N″ and M″ may be other sets of integers differing from 1 and M. In other words, the third array306may be constituted by pluralities of columns and rows of the third light emitting diodes301. In the embodiment, the third light emitting diode301has a fifth side301aand a sixth side301bconnected with each other. The fifth side301aof the third light emitting diodes301are parallel arranged along the second array side304bof the first array304(in the second direction Q2) to make the fifth sides301aof two adjacent fifth sides301astood side by side. A fourth array constituted by a plurality of the fourth light emitting diodes302is disposed at the cross areas at which the second array305intersects the third array306. The fourth array can be an N′″×M″′ array (wherein N″′ and M′″ are positive integers, respectively) constituted by N′″ columns of the fourth light emitting diodes302and M′″ rows of the fourth light emitting diodes302. In the embodiment, N′″ is equal to 1 (N′″=1) and the M″′ is equal to 1 (M′″=1). In other embodiments, N′″ and M′″ may be other integers differing from 1. In other words, the fourth array may be constituted by pluralities of columns and rows of fourth light emitting diodes302. The light emitting diode substrate300may include a plurality of the first arrays304, at least one thirds array306and at least one fourth array; the thirds array306and the fourth array may be both disposed between two adjacent ones of the plurality of the first arrays304.

The third light emitting diodes301may have a top view profile shaped as a rectangle, a square, a parallelogram, a diamond or other regular/irregular shape. The fifth side301aof the third light emitting diode301has a fifth side length substantially equal to D; and the sixth side301bof the third light emitting diode301has a sixth side length substantially equal to B. The fifth side301aof the third light emitting diode301extends in a direction (in the first direction Q1) parallel to the first array side304aof the first array304; and the sixth side301bof the third light emitting diode301extends in a direction (in the second direction Q2) parallel to the second array side304bof the first array304. The fourth light emitting diodes302can also have a top view profile shaped as a rectangle, a square, a parallelogram, a diamond or other regular/irregular shape. The fourth light emitting diode302has a seventh side302aand an eighth side302bconnected with each other. The eighth side302bof the fourth light emitting diode302extending in a direction (the second direction Q2) parallel to the second array side304bof the first array304has an eighth side length substantially equal to C. The seventh side302aof the fourth light emitting diode302extending in a direction (in the first direction Q1) parallel to the first array side304aof the first array304has a seven side length substantially equal to D.

As shown inFIG. 3, the third light emitting diode chips301and the fourth light emitting diode302that are parallel to the second array side304bof the first array304(extending in the second direction Q2) may have a side length substantially equal to C. Similarly, the third light emitting diode chips301and the fourth light emitting diode30that is parallel to the first array side304aof the first array304(extending in the first direction Q1) may have a side length substantially equal to D.

The side length dimensions of the first light emitting diode102, the second light emitting diode103, the third light emitting diode301and the fourth light emitting diode302may not be limited by this regards. In some embodiments, the relationship between the side length dimensions of the first light emitting diode102, the second light emitting diode103, the third light emitting diode301and the fourth light emitting diode302may be represented by the following equation:

Wherein B is different from C; B can be greater than or less than C; D is different from A; D can be greater than or less than A; A can be greater than, equal to or less than B; A can be greater than, equal to or less than C; D can be greater than, equal to or less than B; and D can be greater than, equal to or less than C.

In some embodiments, the light emitting diode substrate300may include a plurality of fifth light emitting diodes308arranging to form a plurality of arrays, such as the arrays307A,307B and307C, on the substrate101. In the embodiment, the dimension and the shape of the fifth light emitting diodes308are identical to that of the first light emitting diodes102. However, the arrangements of the fifth light emitting diodes308, such as the column and the row numbers thereof, used to constitute the arrays307A,307B and307C may be different from that of the first light emitting diodes102used to constitute the first array304. In some embodiments, first array304and the arrays307A,307B and307C can be constituted by identical elements, the first light emitting diodes102, if the arrangements of the fifth light emitting diodes308of the arrays307A,307B and307C are identical to that of the first light emitting diodes102. In this case, the arrays307A,307B and307C constituted by the fifth light emitting diodes308can be regarded as one of the plurality of the first arrays304as described, which are formed in the light emitting diode substrate300. The third array306and the fourth array can be disposed between two adjacent ones of these plurality of the first arrays304either constituted by the first light emitting diodes102or constituted by the fifth light emitting diodes308.

FIG. 4is a top view illustrating a light emitting diode substrate400according to a fourth embodiment of the disclosure. The structure of the light emitting diode substrate400is similar to that of the light emitting diode substrate300except that there is a gap between two adjacent ones of the first light emitting diodes102, the second light emitting diodes103, the third light emitting diode chips301, the fourth light emitting diode302and the fifth light emitting diodes308. For example, there is a distance substantially equal to the first pitch P1between the two adjacent rows of the first light emitting diodes102involved in the first array404; there is a distance substantially equal to the first pitch P1between the two adjacent rows of the fifth light emitting diodes308involved in the arrays407A,407B and407C; there is a distance substantially equal to the second pitch P2between the two adjacent columns of the first light emitting diodes102involved in the first array404and there is a distance substantially equal to the second pitch P2between the two adjacent columns of the fifth light emitting diodes308involved in the arrays407A,407B and407C. Wherein the rows of the first light emitting diodes102and the fifth light emitting diodes308are perpendicular to the first array side404aof the first array404(extending in the first direction Q1); and the columns of the first light emitting diodes102and the fifth light emitting diodes308are perpendicular to the second array side404bof the first array404(extending in the second direction Q2). The third array406can be respectively separated from the first array404, the second array405, the arrays407A,407B and407C for a distance substantially equal to the first pitch P1. The fourth light emitting diode chip302is separated from the first array404for a distance substantially equal to the first pitch P1and is separated from the second array405for a distance substantially equal to the second pitch P2.

FIG. 5is a top view illustrating a light emitting diode substrate500according to a fifth embodiment of the disclosure. The structure of the light emitting diode substrate500is similar to that of the light emitting diode substrate100except the light emitting diode substrate500further includes one or more kinds of micro light emitting diode with various dimensions disposed on the substrate101to form a plurality of arrays adjacent to the first array504and/or the second array505respectively. For example, in the embodiment, the light emitting diode substrate500further includes a plurality of sixth light emitting diodes501and a plurality of seventh light emitting diodes502disposed on the substrate101to form at least one fifth array506and a plurality of sixth arrays507adjacent to the first array504and/or the second array505respectively. In some other embodiments, the light emitting diode substrate500may include at least one fifth array506and at least one seventh arrays507adjacent to the first array504and/or the second array505respectively.

The sixth light emitting diodes501and the seventh light emitting diodes502may also have a top view profile shaped as a rectangle, a square, a parallelogram, a diamond or other regular/irregular shape. The sixth light emitting diode501has a ninth side501aand a tenth side501bconnected with each other. The ninth side501aof the sixth light emitting diode501has a ninth side length substantially equal to A; the tenth side501bof the sixth light emitting diode501has a tenth side length substantially equal to E. The ninth sides501aof the sixth light emitting diode501are perpendicular to the first array side504a(extending in the first direction Q1), and the tenth sides501bof the sixth light emitting diode501are perpendicular to the second array side504b(extending in the second direction Q2). The seventh light emitting diode502has a eleventh side502aand a twelfth side502bconnected with each other. The eleventh side502aof the seventh light emitting diode502has an eleventh side length substantially equal to A; and the twelfth side502bof the seventh light emitting diode502has a twelfth side length substantially equal to E. The eleventh side502aof the seventh light emitting diode502are perpendicular to the first array side504a(extending in the first direction Q1), and the twelfth side502bof the seventh light emitting diode502are perpendicular to the second array side504b(extending in the second direction Q2). In the embodiment, the sixth light emitting diodes501and the seventh light emitting diodes502that is parallel to the first array side504a(extending in the first direction Q1) may have a side length substantially equal to A.

The side length dimensions of the first light emitting diode102, the sixth light emitting diode501and the seventh light emitting diode502may not be limited to this regards. In some embodiments, the relationship between the side length dimensions of the first light emitting diode102, the second light emitting diode103, the sixth light emitting diode501and the seventh light emitting diode502may be represented by the following equation:

Wherein B is different from C; B can be greater than or less than C; E is different from B; E can be greater than or less than B; F is different from B and D can be greater than, equal to or less than B.

FIG. 6is a top view illustrating a light emitting diode substrate600according to a sixth embodiment of the disclosure. The structure of the light emitting diode substrate600is similar to that of the light emitting diode substrate500except that there is a gap between two adjacent ones of the first light emitting diodes102, the second light emitting diodes103, the sixth light emitting diodes501and the seventh light emitting diodes502.

For example, there is a distance substantially equal to the first pitch P1between the two adjacent rows of the first light emitting diodes102perpendicular to the first direction Q1, and there is a distance substantially equal to the second pitch P2between the two adjacent columns of the first light emitting diodes102perpendicular to the second direction Q2. There is a distance substantially equal to the first pitch P1between the two adjacent rows constituted by a plurality of the first light emitting diodes102, the second light emitting diodes103, the sixth light emitting diodes501and the seventh light emitting diodes502. There is a distance substantially equal to the second pitch P2between the first array604and the second array605; there is a distance substantially equal to the second pitch P2between the first array604and the fifth array606; there is a distance substantially equal to the second pitch P2between the second array605and the fifth array606; there is a distance equal to the second pitch P2between the fifth array606and the sixth array607; there is a distance equal to the second pitch P2between two adjacent fifth arrays606; and there is a distance equal to the second pitch P2between two adjacent sixth arrays607. In other words, in the embodiment, whatever two adjacent columns that are constituted by a plurality of the first light emitting diodes102, the second light emitting diodes103, the sixth light emitting diodes501and the seventh light emitting diodes502and perpendicular to the second direction Q2may be separated with each other for a distance substantially equal to the second pitch P2.

The micro light emitting diode provided by the aforementioned light emitting diode substrates100,200,300,400,500and600can be applied to form a light emitting diode display apparatus by flip-chip and bounding technology.FIG. 7is a cross-sectional view partially illustrating the processing structure for the fabrication of a light emitting diode display apparatus70according to one embodiment of the disclosure. In some embodiments of the disclosure, the flip-chip and bounding technology can be implemented by applying a plurality of capture devices711configured on a tool71to pick up the micro light emitting diodes, such as the light emitting diodes102and103, from a light emitting diode substrates (e.g. the light emitting diode substrates100as shown inFIG. 1) which is previously subjected to a dicing process for the substrate. The picked light emitting diodes102and103are then bonded onto a TFT circuit701configured in a sub-pixel array of the light emitting diode display apparatus70in a manner of jointing the anode and the cathode of the picked light emitting diode (such as the anode1021and the cathode1021of the picked light emitting diode102) to the corresponding anode bonding pad73aand the cathode bonding pad73b, which are electrically connected to the TFT circuit701, respectively. Whereby, the light emitting diodes102and103integrated within the light emitting diode display apparatus70can be drove by the TFT circuit701to displaying vivid images.

The sub-pixel array of the light emitting diodes of the display apparatus70can be divided into a plurality of sub-pixel regions702by the arrangements of the TFT circuit701. The sub-pixel regions702has at least one active device701aused to provide the anode bonding pad73aand the cathode bonding pad73belectrically connected with the anode1021and the cathode1021of the picked light emitting diodes102. Regarding the distance S between two adjacent sub-pixel regions702(also referred to as the distance between two identical features of two adjacent sub-pixel regions702, such as the distance between two anode bonding pads73aof two adjacent sub-pixel regions702) is greater than the distance between two adjacent light emitting diodes formed on the light emitting diode substrates100(e.g. the distance is substantially equal to the first side length A of the light emitting diode102extending in the first direction Q1, S>A). The distance L between two adjacent capture devices711of the tool71is equal to the distance S and such is a multiple (n, wherein n is a positive integer) of at least one side extending distance of the various arrays that are respectively constituted by the light emitting diodes (such as the light emitting diodes102or/and light emitting diodes103) with different dimensions on the light emitting diode substrates100. That is in order to pick up a plurality of the light emitting diodes (such as the light emitting diodes102or/and light emitting diodes103) from the light emitting diode substrates100and finely bond them onto the bonding pads of the active devices701aconfigured on the TFT circuit701at one time.

For example, when the tool71is applied to pick up the light emitting diode (such as the light emitting diodes102or/and103) along the first array side104aof the first array104(in the first direction Q1), the distance L between two adjacent capture devices711of the tool71can be equal to one first extending distance K1(substantially equal to A×M) of the first array104. The relationship between the distance S, the distance L and the first extending distance K1may be represented by the following equation:
S=L=n×A×M(n=1)

When the tool71is applied to pick up the light emitting diodes (such as the light emitting diodes102or/and103) along the second array side104bof the first array104(in the second direction Q2), the distance L between two adjacent capture devices711of the tool71can be equal to the sum of one second extending distance K2(substantially equal to B×N) of the first array104and one second side length C of the second side102bof the first light emitting diode102. The relationship between the distance S, the distance L, the first extending distance K2and the second side length C may be represented by the following equation:
S=L=n×(B×N+C) (n=1)

In another embodiment of the disclosure, the light emitting diode display apparatus70is formed with the light emitting diodes102and/or103provided by the light emitting diode structure200, as depicted inFIG. 2. When the tool71is applied to pick up the light emitting diodes (such as the light emitting diodes102or/and103) along the first array side204aof the first array204(in the first direction Q1), the distance L between two adjacent capture devices711of the tool71can be equal to one first extending distance K1(substantially equal to [(A+P1)×M]) of the first array204. The relationship between the distance S, the distance L and the first extending distance K1may be represented by the following equation:
S=L=n×[(A+P1)×M] (n=1)

When the tool71is applied to pick up the light emitting diodes (such as the light emitting diodes102or/and103) along the second array side204bof the first array204(in the second direction Q2), the distance L between two adjacent capture devices711of the tool71can be equal to the sum of one second extending distance K2(substantially equal to [(B+P2)×N]) of the first array204, one second side length C of the second side102bof the first light emitting diode102and one second pitch P2. The relationship between the distance S, the distance L, the first extending distance K2and the second side length C may be represented by the following equation:
S=L=n×[N×(B+P2)+1×(C+P2)] (n=1)

In another embodiment of the disclosure, the light emitting diode display apparatus70is formed with the light emitting diodes provided by the light emitting diode structure300, as depicted inFIG. 3. When the tool71is applied to pick up the light emitting diodes (such as the light emitting diodes102,103,301or/and302) along the first array side304aof the first array304(in the first direction Q1), the distance L between two adjacent capture devices711of the tool71can be equal to the sum of one first extending distance K1(substantially equal to A×M]) of the first array side304, one fifth side length D of the fifth side301aof the third light emitting diode301. The relationship between the distance S, the distance L, the first extending distance K1and the fifth side length D may be represented by the following equation:
S=L=n×(A×M+D) (n=1)

When the tool71is applied to pick up the light emitting diodes (such as the light emitting diodes102,103,301or/and302) along the second array side304bof the first array304(in the second direction Q2), the distance L between two adjacent capture devices711of the tool71can be equal to the sum of one second extending distance K2(equal to B×N) of the first array304and one second side length C of the second side102bof the first light emitting diode102. The relationship between the distance S, the distance L, the first extending distance K2and the second side length C may be represented by the following equation:
S=L=n×(B×N+C) (n=1)

In another embodiment of the disclosure, the light emitting diode display apparatus70is formed with the light emitting diodes provided by the light emitting diode structure400, as depicted inFIG. 4. When the tool71is applied to pick up the light emitting diodes (such as the light emitting diodes102,103,301or/and302) along the first array side404aof the first array404(in the first direction Q1), the distance L between two adjacent capture devices711of the tool71can be equal to the sum of one first extending distance K1(substantially equal to [(A+P1)×M]) of the first array side404, one fifth side length D of the fifth side301aof the third light emitting diode301and one first pitch P1. The relationship between the distance S, the distance L, the first extending distance K1, the fifth side length D and the first pitch P1may be represented by the following equation:
S=L=n×[M×(A+P1)+1×(P1+D)] (n=1)

When the tool71is applied to pick up the light emitting diodes (such as the light emitting diodes102,103,301or/and302) along the second array side404bof the first array404(in the second direction Q2), the distance L between two adjacent capture devices711of the tool71can be equal to the sum of one second extending distance K2(substantially equal to [(B+P2)×N]) of the first array404, one second side length C of the second side102bof the first light emitting diode102and one second pitch P2. The relationship between the distance S, the distance L, the first extending distance K2, the second side length C and the second pitch P2may be represented by the following equation:
S=L=n×[(B+P2)×N+P2+C) (n=1)

Similarly, the light emitting diode display apparatus70can also be formed with the light emitting diodes provided by the light emitting diode structure600respectively, as depicted inFIG. 6. The relationship between the distance S, the distance L can also be represented by an equation in accordance with the same logic as described above in previous sections.

In accordance with the aforementioned embodiments of the disclosure, a light emitting diode substrate and a display apparatus applying the same are provided. At least two kinds of light emitting diodes with different dimensions are formed on the light emitting diode substrate, and the dimension parameters and the arrangements of these at least two kinds of light emitting diodes that are formed on the light emitting diode substrate can be determined in accordance with (by cross-referencing) the dimension and design parameters of the tools to pick up the light emitting diodes from the light emitting diode substrate and the dimension and design parameters of a sub-pixel array of the display apparatus on which the light emitting diodes are bonded. The tools to implement the process for fabricating the display apparatus thus can pick up a plurality of light emitting diodes formed on the light emitting diode substrate at one time and then bond the picked light emitting diodes onto the sub-pixel array of the display apparatus more precisely.

While the disclosure has been described by examples and in terms of the preferred embodiment(s), it should be understood that the disclosure is not limited thereto. On the contrary, it is intended to con various modifications and similar arrangements and procedures, and the scope of appended claims therefore should be accorded with the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.