CN110838500B

CN110838500B - Micro light-emitting diode display device

Info

Publication number: CN110838500B
Application number: CN201810938695.6A
Authority: CN
Inventors: 苏柏仁; 许国君; 曾春铭
Original assignee: British Cayman Islands Shangnachuang Technology Co ltd
Current assignee: British Cayman Islands Shangnachuang Technology Co ltd
Priority date: 2018-08-17
Filing date: 2018-08-17
Publication date: 2023-02-28
Anticipated expiration: 2038-08-17
Also published as: CN110838500A

Abstract

The invention discloses a micro light-emitting diode display device which comprises a substrate and a plurality of display units. The substrate has a bearing surface. The display units are arranged on the bearing surface, and each display unit comprises a plurality of micro light-emitting diodes. Any two adjacent display units in the plurality of display units have a space and the width of the space is changed.

Description

Micro light-emitting diode display device

Technical Field

The present invention relates to a micro light emitting diode display device, and more particularly, to a micro light emitting diode display device having a display unit structure.

Background

With the progress of optoelectronic technology, the volume of many optoelectronic devices is gradually reduced. In recent years, micron-sized Light Emitting Diodes (LEDs) have come to be available due to the breakthrough in the manufacturing size of LEDs, that is, micro-LEDs, and micro-LED displays manufactured by arranging micro-LEDs in an array are gaining increasing attention in the market.

The micro led display belongs to an active Light Emitting device display, which is more power-saving than an Organic Light-Emitting Diode (OLED) display, has a better contrast performance, and can be seen in the sun. In addition, since the micro light emitting diode display is made of inorganic materials, the micro light emitting diode display has better reliability and longer service life compared with an organic light emitting diode display.

Generally, the size of the led display panel required by different industries is different, and therefore, in the process of manufacturing the led display panel, the led display panel needs to be cut and spliced to form led displays of various sizes, so as to meet the requirements of different industries. However, the current micro led display panel has poor yield and is prone to thermal expansion after being spliced, and other problems, and a corresponding solution is still proposed by people in the related art.

Disclosure of Invention

The invention provides a micro light-emitting diode display device which has the structural characteristic that a space exists between adjacent display units, can improve the qualified rate of panel cutting, and can improve the problem of thermal expansion caused by splicing.

According to an embodiment of the present invention, a micro light emitting diode display device includes a substrate and a plurality of display units. The substrate has a bearing surface. The display units are arranged on the bearing surface, and each display unit comprises a plurality of micro light-emitting diodes. Any two adjacent display units in the plurality of display units have a space and the width of the space is changed.

In summary, in the micro led display device provided by the present invention, the cutting process can be easily performed mainly by the structural characteristic that the distance exists between the adjacent display units, so as to improve the cutting yield of the display panel. Moreover, the structural characteristics can also improve the problem of thermal expansion possibly generated after the display panel is spliced.

The foregoing summary of the invention, as well as the following detailed description of the embodiments, is provided to illustrate and explain the principles and spirit of the invention, and to provide further explanation of the invention as claimed.

Drawings

Fig. 1 is a top view of a micro light emitting diode display device according to an embodiment of the invention.

Fig. 2 is a cross-sectional view of the micro light emitting diode display device according to the embodiment of fig. 1.

Fig. 3 is a top view of a micro led display device according to another embodiment of the invention.

Fig. 4A is a cross-sectional view of the micro light emitting diode display device according to the embodiment of fig. 3.

Fig. 4B is a cross-sectional view of a micro light emitting diode display device according to another embodiment of the invention.

Fig. 5 is a cross-sectional view of a micro light emitting diode display device according to another embodiment of the invention.

Fig. 6A to 6C are schematic views illustrating a cutting and splicing process of a micro light emitting diode display device according to an embodiment of the invention.

Wherein, the reference numbers:

1. 2, 3, 4 micro light-emitting diode display device

10. 20, 30 substrate

Display units 101 to 109, 201 to 216, 301 to 302, 401 to 409

201a, 202a shading structure

34. Cover plate

a1, a2, b1, b2, c1, c2 side surface

Angle A

TS Top surface

BS bottom surface

Width of W1

Spacing between DS, W2 and W3

D1 Maximum width

D2 Minimum width

E1 Edge of a container

h1, h2 height

S1 bearing surface

CS coated surface

P-type micro light-emitting diode

PX pixel

PH interval

CP 1-CP 2, CP1 '-CP 2', CP3, CP4 cutting path

SP 1-SP 4 splicing seam

SP distance

GP gap

Detailed Description

The detailed features and advantages of the invention are described in detail in the embodiments below, which are sufficient for a person skilled in the art to understand the technical contents of the invention and to implement the invention, and the objects and advantages related to the invention can be easily understood by the person skilled in the art from the disclosure of the present specification, the claims and the drawings. The following examples are intended to further illustrate aspects of the present invention in detail, but are not intended to limit the scope of the present invention in any way.

Referring to fig. 1 and fig. 2 together, fig. 1 is a top view of a micro light emitting diode display device according to an embodiment of the invention, and fig. 2 is a cross-sectional view of the micro light emitting diode display device according to the embodiment of fig. 1. Specifically, fig. 2 is a cross-sectional view of the micro light emitting diode display device of fig. 1 according to a section line BB'. As shown in the figure, the micro led display device 1 includes a substrate 10 and a plurality of display units 101 to 109, and the substrate 10 has a carrying surface S1. In practice, the substrate 10 may be a Printed Circuit Board (PCB), a Flexible Printed Circuit Board (FPCB), a Thin Film Transistor (TFT) glass backplane, a glass backplane with a conductive trace, a Circuit Board with an Integrated Circuit (IC), or other driving substrate with a working Circuit. A plurality of display units 101 to 109 are disposed on the bearing surface S1 of the substrate 10, and each display unit includes a plurality of micro light emitting diodes P. The display units 101 to 109 are electrically connected to the substrate 10, so that the control devices, such as a driving Integrated Circuit (IC), disposed on the substrate 10 can drive the micro light emitting diodes P through the electrical connection. In this embodiment, each display unit includes a plurality of pixels PX, and each pixel includes at least three micro light emitting diodes P of different colors, such as red, green, and blue micro light emitting diodes, having a maximum side length between 3 and 150 micrometers (μm). However, the present invention is not limited to the above embodiments.

In practice, the micro led display device 1 may include other components, such as a memory, a touch screen controller, a battery, etc., but the invention is not limited thereto. In other examples, the micro led display device 1 can be a tv, a tablet computer, a telephone, a laptop computer, a computer monitor, a stand-alone terminal service desk, a digital camera, a handheld game console panel, a media display, an e-book display, a car display, or a large electronic billboard display. Compared with the common millimeter-scale light emitting diode technology, the display panel applying the micron-scale micro light emitting diode technology can achieve high resolution and reduce power consumption. In addition, the micro light emitting diode display panel has the advantages of energy conservation, simple mechanism and thinness.

In this embodiment, the micro led display device 1 has a space between any two adjacent display units among the display units 101 to 109, and the width of the space varies. In fig. 2, there is a spacing DS between

adjacent display units

101 and 102, and the width thereof varies. In one embodiment, as shown in fig. 2, the width of the spacing DS close to the substrate 10 is smaller than the width of the spacing DS away from the substrate 10, so that a better alignment margin can be obtained during the subsequent display panel splicing process, thereby increasing the manufacturing yield. Specifically, the width of the pitch DS increases from the substrate 10 toward the direction away from the substrate 10. Here, the width of the spacing DS continuously increases from the substrate 10 toward the direction away from the substrate 10, and in the embodiment not shown, the width of the spacing is discontinuously increased from the substrate toward the direction away from the substrate, for example, stepwise increased. In the embodiment of fig. 2, the spacing DS has a maximum width D1 and a minimum width D2. In one example, the ratio of the minimum width D2 to the maximum width D1 is greater than or equal to 0.8 and less than or equal to 0.95, the ratio greater than 0.95 cannot avoid the problem of thermal expansion when splicing the display panels in the future, and the ratio less than 0.8 may result in a poor light-emitting pattern. In another example, the minimum width D2 is less than 200 micrometers (μm) and greater than or equal to 20 micrometers. This example limits the minimum width D2 to a range of less than 200 micrometers (μm) and 20 μm or more, which can help to avoid the quality of the display panel from being affected by the too large splicing seam when splicing the display panel at a later date.

The micro light emitting diode display device provided by the invention can be regarded as a display panel die in a manufacturing process in practice, the display units 101-109 are display packaging bodies arranged on the display panel, and the display panel can be conveniently cut into a plurality of small-area panels by reserving intervals among the display packaging bodies for subsequent splicing. In one embodiment, the supporting surface S1 of the substrate 10 has a scribe line defined thereon, and the scribe line is disposed between any two adjacent display units. As shown in fig. 1, the longitudinal scribe line CP1 is, for example, interposed between the

adjacent display units

101 and 102, between the

adjacent display units

104 and 105, and between the

adjacent display units

107 and 108. In addition, the transverse cutting line CP2 is, for example, interposed between the

adjacent display units

101 and 104, between the

adjacent display units

102 and 105, and between the

adjacent display units

103 and 106.

The scribe line CP1 is located within the distance between the

display units

101 and 102, the distance between the

display units

104 and 105, and the distance between the

display units

107 and 108, and the scribe line CP2 is located within the distance between the

display units

101 and 104, the distance between the

display units

102 and 105, and the distance between the

display units

103 and 106. In one embodiment, the distance between the scribe line and an edge of any two adjacent display units on the substrate 10 is less than 100 micrometers (μm). For example, the distance between the cutting line CP1 and the edge of the display unit 101 and/or the display unit 102 on the substrate 10 is less than 100 micrometers (μm), so that the problem of poor display quality due to too large splicing seams between the spliced micro light emitting diode display devices can be avoided.

Each display unit has a top surface far from the carrying surface S1 and a bottom surface adjacent to the carrying surface, for example, as shown in fig. 2, the display unit 101 has a top surface TS far from the carrying surface S1 and a bottom surface BS adjacent to the carrying surface S1, and an orthographic area of the top surface TS on the substrate 10 is smaller than an orthographic area of the bottom surface BS on the substrate 10. In other words, the area of the top surface TS is smaller than the area of the bottom surface BS. In one example, the ratio of the area of the forward projection of the top surface TS on the substrate 10 to the area of the forward projection of the bottom surface BS on the substrate 10 is greater than or equal to 0.8 and less than or equal to 0.95, the ratio greater than 0.95 cannot avoid the problem of thermal expansion when splicing the display panels in the future, and the ratio less than 0.8 may result in a poor light-emitting pattern. In practice, the top surface of the display unit may be roughened by a surface roughening technique, thereby increasing the light extraction efficiency.

In one embodiment, the sum of the orthographic projection areas of the display units 101 to 109 on the substrate 10 is smaller than the area of the carrying surface S1. In an actual example, the ratio of the sum of the forward projection areas of the display units 101 to 109 on the substrate 10 to the area of the carrying surface S1 is greater than or equal to 0.8 and less than or equal to 0.95. In more detail, the sum of the orthographic projection areas of the display units 101 to 109 on the substrate 10 can be regarded as the sum of the areas of the bottom surfaces of the display units 101 to 109, and since the gaps are formed between the bottom surfaces of the adjacent display units for the cutting operation, the sum of the areas of the bottom surfaces of the display units 101 to 109 is slightly smaller than the area of the bearing surface S1, so that the subsequent cutting operation has a better yield.

In one embodiment, each display unit has a plurality of side surfaces, and each side surface forms an included angle a with the supporting surface S1 of the substrate 10, wherein the included angle a is between 20 and 80 degrees. In the cross-sectional view of fig. 2, the display unit 102 has side surfaces a1 and a2, wherein the side surface a1 forms an included angle a with the supporting surface S1 of the substrate 10. More specifically, each display unit has four side surfaces, each side surface bordering a top surface and a bottom surface. Since the area of the top surface is smaller than that of the bottom surface, each side surface and the bearing surface S1 may form the included angle. Here, due to the angle structure, the cross section of each display unit is in a ladder shape, for example, as shown in the cross section of fig. 2, the

display units

101 and 102 are in a ladder shape. In another embodiment, the included angles formed by the four side surfaces of each display unit and the bottom surface are different according to the requirement. In another embodiment, the cross section of each display unit may be stepped. However, the present invention is not limited to the cross-sectional shapes of the display units of the above embodiments.

In one embodiment, the height of each micro light emitting diode is less than the height of each display unit. More specifically, the ratio of the height of each micro light emitting diode to the height of each display unit is less than 0.15. Taking the display unit 102 of fig. 2 and the micro leds P therein as an example, the ratio of the height h2 of each micro led P to the height h1 of the display unit 102 is less than 0.15. In a preferred embodiment, the height h1 of the display unit may be between 40 and 250 micrometers (μm). By the height characteristic, the display unit has better light type and avoids influencing light emission. In one embodiment, each display unit has a height H, and each micro light emitting diode has a width W and an included angle a between a side surface and a carrying surface thereof, wherein

The Pitch is the distance between any two adjacent pixels in the display unit. Taking the display unit 102 in fig. 2 as an example, if the display unit 102 has a height h1, an included angle between a side surface a1 and the carrying surface S1 is a, widths of the micro light emitting diodes P in the display unit 102 are all W1, and a pitch between adjacent pixels PX is PH, the relationship can be obtained by substituting the above-mentioned related parameters related to the display unit 102 into the above formula:

in one embodiment, the edge of each display unit on the substrate is adjacent to the edge of a portion of the micro light emitting diodes among the micro light emitting diodes and the distance between the edges is less than 600 micrometers (μm). In detail, the edge of the display unit on the substrate is a connection point between the side surface of the display unit and the carrying surface of the substrate, such as the edge E1 shown in fig. 1 and 2, and a distance SP between the plurality of micro light emitting diodes P adjacent to the edge E1 and the edge E1 is smaller than 600 micrometers (μm), so that the display unit has a better light shape and light emission is not affected.

Referring to fig. 3 and 4A together, fig. 3 is a top view of a micro light emitting diode display device according to another embodiment of the invention, and fig. 4A is a cross-sectional view of the micro light emitting diode display device according to the embodiment of fig. 3 of the invention. Specifically, fig. 4A is a cross-sectional view of the micro led display device shown in fig. 3 according to a section line CC'. The micro led display device 2 of fig. 3 and 4A has substantially the same structure as the micro led display device 1 of fig. 1 and 2. As shown in the plan view of fig. 3, the micro light emitting diode display device 2 includes a plurality of display units 201 to 216 provided on the substrate 20 and each including a plurality of micro light emitting diodes P. The substrate 20 has a plurality of longitudinal streets CP3 and transverse streets CP4. The main difference between the two embodiments of fig. 1-2 and fig. 3-4A is that the micro led display device 2 shown in fig. 3 and fig. 4A further includes a plurality of light shielding structures, and each light shielding structure covers the top surface of a corresponding display unit. As illustrated in the cross-sectional view of fig. 4A, the light shielding structure 201a covers the top surface of the display unit 201, and the light shielding structure 202a covers the top surface of the display unit 202. In one example, the ratio of the coverage area of the top surface of each light shielding structure on the corresponding display unit to the area of the top surface of the corresponding display unit is greater than or equal to 0.5 and less than or equal to 0.95. That is, the light shielding structure may not completely cover the entirety of the top surface of the corresponding display unit, and may cover only a portion of the top surface. In practice, the light shielding structure is a Black Matrix (BM) layer, which is usually made of Black photoresist material, and is mainly used to prevent light leakage and increase the contrast of the display panel.

As mentioned above, each display unit has a side surface, and each light shielding structure completely covers the side surface of the corresponding display unit. In the embodiment of fig. 4A, the side surface b1 of the display unit 201 is completely covered by the light shielding structure 201a, and the side surface b2 of the display unit 202 is completely covered by the light shielding structure 202a for preventing side light leakage. In an embodiment, the orthographic projection of each light shielding structure on the substrate 20 covers the orthographic projection of a part of the micro light emitting diodes in the corresponding display unit on the substrate 20. Taking the display unit 201 in fig. 4A as an example, the orthographic projection of the light-shielding structure 201a on the display unit 201 on the substrate 20 covers the orthographic projection of the leftmost micro light-emitting diode P on the substrate 20. In this embodiment, the ratio of the overlapping area of the orthographic projection of the light-shielding structure 201a on the substrate 20 and the orthographic projection of the leftmost micro led P on the substrate 20 to the orthographic projection of the left micro led P on the substrate 20 is less than or equal to 0.4, and the light emission is affected if the ratio is greater than 0.4.

That is, the light shielding structure 201a only covers a portion of the leftmost micro led P, and a ratio of an area covered by the leftmost micro led P to an upper surface area of the leftmost micro led P is less than or equal to 0.4. Preferably, the ratio of the area covered by the leftmost micro led P to the upper surface area of the leftmost micro led P is less than or equal to 0.1, so as to increase the light-emitting aperture ratio. In particular, the light shielding structure may be further disposed between each corresponding pixel. Referring to fig. 4B, fig. 4B is a cross-sectional view of a micro light emitting diode display device according to another embodiment of the invention. As shown in fig. 4B, the light shielding structure 201a of the display unit 201 is further disposed between each pixel PX for preventing the light emitted from each pixel P from influencing each other to cause crosstalk (crosstalk) and increasing the contrast of the display panel. In the embodiments of fig. 3, 4A and 4B, the light shielding structure covered above the display unit can extend from the display unit to the scribe line CP3 on the carrying surface of the substrate 20. In other words, the light shielding structure is not limited to be disposed only on the display unit, but may be extended and disposed on the scribe line. In another embodiment, the light-shielding structure may cover only a portion of the top surface and four side surfaces of the corresponding display unit without extending to the scribe line.

In one embodiment, in order to reserve the wiring space, the distance between the edge of a part of the display units close to the edge of the substrate among the plurality of display units and the edge of the substrate is larger than the distance between another part of the display units located in the central region of the substrate. In the top view of the embodiment of fig. 3, the distance (e.g., the distance W2) between the edges of the display units 201 to 205, 208, 209, 212, 213 to 216 close to the edge of the substrate and the edge of the substrate 20 is relatively large, and the distance (e.g., the distance W3) between the

display units

206, 207, 210, 211 in the central region is relatively small, so that a large space can be left for the peripheral lines at the edge of the substrate, and the problem that the lines cannot be properly arranged due to an excessively narrow space, and finally the transmission of the lines is poor or abnormal, can be avoided.

Referring to fig. 5, fig. 5 is a cross-sectional view of a micro light emitting diode display device according to another embodiment of the invention. The micro led display device 3 of fig. 5 has substantially the same structure as the micro led display device 1 of fig. 2. Referring to the cross-sectional view of fig. 5, the micro led display device 3 has a plurality of display units 301 to 302 disposed on the substrate 30 and respectively including a plurality of micro leds P. The main difference between fig. 2 and fig. 5 is that the micro led display device 3 of fig. 5 further includes a cover plate 34 covering the display units 301 to 302. In a practical example, the cover plate 34 may be a glass cover plate, and may have the same size as the substrate 30 or a slightly larger size than the substrate 30. As shown in fig. 4, the cover plate 34 has a cover surface CS attached to the top surfaces of the display units 301 to 302. The cover surface CS of the cover plate 34 faces the substrate 30, and a portion of the cover surface CS and the side surfaces c1 and c2 of the two

adjacent display units

301 and 302 and a portion of the carrying surface S3 surround to form a gap GP. Here, the gap GP is an air gap (air gap), which increases the process margin when the display unit is cut or assembled. In an embodiment not shown, the gap GP may also be a gap filled with a glue material, wherein the refractive index of the glue material may be greater than the refractive index of air and/or less than the refractive index of the light-shielding structure.

Referring to fig. 6A to 6C, fig. 6A to 6C are schematic views illustrating a cutting and splicing process of a micro light emitting diode display device according to an embodiment of the invention. Generally, in order to meet the requirements of display panels with different sizes in the market, in the process of manufacturing the display panels, a display panel mold needs to be properly cut and then spliced to form a display panel with a proper size. Fig. 6A shows a micro led display device 4 before cutting, on which a plurality of display units 401 to 409, each including a plurality of micro leds P, are disposed. The spaces between adjacent display cells are provided with cutting streets, such as the cutting streets CP1 'to CP2' described in fig. 6A. During the manufacturing process, the micro led display device 4 can be cut along the cutting lines CP1 '-CP 2' to obtain a plurality of blocks of independent display units, as shown in fig. 6B. The micro light-emitting diode display device provided by the invention has the advantages that the intervals are reserved among the display units, and the cutting channels are arranged in the intervals, so that the cutting procedure is favorably carried out.

Then, the plurality of cut display units 401 to 409 can be further spliced to form the micro led display device shown in fig. 6C. In view of the foregoing, fig. 6C shows the spliced micro led display device 4, where the adjacent display units have splicing seams, such as splicing seams SP1 to SP4. As described in the foregoing embodiment, the distance between the scribe line and one edge of any two adjacent display units on the substrate 10 is very small, for example, less than 100 micrometers (μm), so that the joint seams SP1 to SP4 formed by splicing the blocks of the individual display units are not too obvious, which may affect the display quality of the entire display panel.

In summary, in the micro led display device provided in the present invention, the cutting procedure is easy to be performed mainly by the structural characteristic that the distance exists between the adjacent display units, so as to improve the cutting yield of the display panel. Moreover, the thermal expansion problem which may be generated after the display panel is spliced can be improved by utilizing the structural characteristics.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A miniature light emitting diode display device, comprising:

a substrate having a carrying surface and a working circuit; and

a plurality of display units arranged on the bearing surface, wherein each display unit is a display packaging body and comprises a plurality of pixels, each pixel comprises at least three micro light-emitting diodes with different colors, the display units are electrically connected to the substrate through the working circuit, a space exists between any two adjacent display units in the display units, the bottom ends of the side walls of any two adjacent display units are separated from each other, and the width of the space is changed;

wherein the space has a maximum width and a minimum width, and the ratio of the minimum width to the maximum width is greater than or equal to 0.8 and less than or equal to 0.95.

2. The device of claim 1, wherein a width of the space near the substrate is less than a width of the space away from the substrate.

3. The micro light-emitting diode display device of claim 2, wherein the width of the spacing increases from the substrate toward the substrate.

4. The micro led display device of claim 1, wherein each display unit has a top surface far away from the carrier surface and a bottom surface adjacent to the carrier surface, and an area of an orthographic projection of the top surface on the substrate is smaller than an area of an orthographic projection of the bottom surface on the substrate.

5. The device of claim 1, wherein a sum of forward projection areas of the display units on the substrate is smaller than an area of the supporting surface.

6. The micro-led display device of claim 1, wherein the ratio of the height of each micro-led to the height of each display unit is less than 0.15.

7. The micro light-emitting diode display device of claim 1, further comprising:

each light shielding structure covers a top surface of a corresponding display unit in the display units, and the ratio of the covering area of the top surface of each light shielding structure on the corresponding display unit to the area of the top surface of the corresponding display unit is greater than or equal to 0.5 and less than or equal to 0.95.

8. The oled display device claimed in claim 7, wherein each display unit has a side surface, and each light shielding structure completely covers the side surface of the corresponding display unit.

9. The device of claim 7, wherein the orthographic projection of each light shielding structure on the substrate covers the orthographic projection of a portion of the micro light emitting diodes in the corresponding display unit on the substrate, and a ratio of an overlapping area of the orthographic projection of the light shielding structure on the substrate and the orthographic projection of the portion of the micro light emitting diodes on the substrate to an area of the orthographic projection of the portion of the micro light emitting diodes on the substrate is less than or equal to 0.4.

10. The micro light-emitting diode display device of claim 1, further comprising:

and the cover plate covers the display units and is provided with a covering surface facing the substrate, and a gap is formed by surrounding one part of the covering surface, the side surfaces of any two adjacent display units and one part of the bearing surface.

11. The device of claim 1, wherein the edge of each display unit on the substrate is adjacent to the edge of a portion of the micro-leds within a distance range of less than 600 μm.

12. The device of claim 1, wherein each display unit has a plurality of side surfaces, each side surface forming an angle A with the supporting surface of the substrate, wherein the angle A is between 20 and 80 degrees.

13. The micro-led display device of claim 12, wherein each display unit has a height H and each micro-led has a width W, wherein

And Pitch is a Pitch of any two adjacent pixels in the display unit.

14. The device of claim 1, wherein a scribe line is defined on the supporting surface of the substrate, the scribe line is located between any two adjacent display units and within the gap, and a distance between the scribe line and an edge of one of the any two adjacent display units on the substrate is less than 100 μm.

15. The micro led display device of claim 14, wherein any two adjacent display units are covered with a light shielding structure, and the two light shielding structures extend from the any two adjacent display units to the cutting street on the supporting surface.

16. The micro light emitting diode display device of claim 1, wherein a distance between an edge of a portion of the display cells near an edge of the substrate and the edge of the substrate is greater than a distance between another portion of the display cells located in a central region of the substrate.

17. A micro light emitting diode display device, comprising:

a substrate having a carrying surface; and

a plurality of display units arranged on the bearing surface, wherein each display unit comprises a plurality of micro light-emitting diodes, a space exists between any two adjacent display units in the display units, the bottom ends of the side walls of any two adjacent display units are separated from each other, and the width of the space is changed;

wherein each display unit has a plurality of side surfaces, each side surface forms an included angle A with the bearing surface of the substrate, the included angle A is between 20 and 80 degrees, each display unit has a height H, each micro light-emitting diode has a width W, each display unit comprises a plurality of pixels, and each pixel comprises at least three micro light-emitting diodes with different colors, wherein

And pitch is a pitch of any two adjacent pixels in the display unit.

18. A micro light emitting diode display device, comprising:

a substrate having a carrying surface and a working circuit;

a plurality of display units arranged on the bearing surface, wherein each display unit is a display packaging body and comprises a plurality of pixels, each pixel comprises at least three micro light-emitting diodes with different colors, the display units are electrically connected to the substrate through the working circuit, a space exists between any two adjacent display units in the display units, the bottom ends of the side walls of any two adjacent display units are separated from each other, and the width of the space is changed; and

a plurality of light shielding structures, each light shielding structure covering a top surface of a corresponding one of the display units, wherein the ratio of the area covered by the top surface of the corresponding light shielding structure on the corresponding display unit to the area covered by the top surface of the corresponding display unit is greater than or equal to 0.5 and less than or equal to 0.95;

each display unit is provided with a side surface, and each shading structure completely covers the side surface of the corresponding display unit.