阅读说明：本技术 Mini-LED显示模组及其芯粒电极的对准容差设计方法 (Mini-LED display module and alignment tolerance design method of core particle electrode thereof ) 是由 张秀 蔡勇 庞佳鑫 岳瑞 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种Mini-LED显示模组及其芯粒电极的对准容差设计方法。所述Mini-LED显示模组包括呈阵列排布的多个LED芯粒,其中每一LED芯粒的每一电极与相应的导电线路电性接触；每一电极沿相应导电线路线宽方向的最大尺寸L＞(W+Δ×2),其中W为相应导电线路的线宽,Δ为每一电极与相应导电线路之间的对准允许误差。采用本发明的方法制备的Mini-LED显示模组,可靠性好,集成度高,分辨率高。(The invention discloses a Mini-LED display module and an alignment tolerance design method of a core particle electrode of the Mini-LED display module. The Mini-LED display module comprises a plurality of LED core particles which are arranged in an array, wherein each electrode of each LED core particle is electrically contacted with a corresponding conductive circuit; and the maximum dimension L > (W + delta x 2) of each electrode along the line width direction of the corresponding conductive line, wherein W is the line width of the corresponding conductive line, and delta is the alignment tolerance between each electrode and the corresponding conductive line. The Mini-LED display module prepared by the method has the advantages of good reliability, high integration level and high resolution.)

1. A Mini-LED display module comprises a plurality of LED core particles which are arranged in an array, wherein each electrode of each LED core particle is electrically contacted with a corresponding conductive circuit; the method is characterized in that: and the maximum dimension L > (W + delta x 2) of each electrode along the line width direction of the corresponding conductive line, wherein W is the line width of the corresponding conductive line, and delta is the alignment tolerance between each electrode and the corresponding conductive line.

2. The Mini-LED display module of claim 1, wherein the conductive traces comprise:

a first conductive trace electrically coupled to the first electrode of the LED core particle,

and the second conductive circuit is electrically combined with the second electrode of the LED core particle.

3. The Mini-LED display module of claim 2, wherein: the first conductive circuit is electrically combined with at least two first electrodes.

4. The Mini-LED display module of claim 2, wherein: the second conductive circuit is electrically connected with a corresponding second electrode.

5. The Mini-LED display module of claim 1, wherein: the plurality of LED core particles are arranged in series and/or in parallel.

6. The Mini-LED display module of claim 2, wherein: the LED core particles are strip-shaped, and a first electrode and a second electrode of each LED core particle respectively extend along the width direction and the length direction of each LED core particle;

wherein the maximum dimension L of the first electrode along the width direction of the LED core particle₁₁＞(W₁+ Δ × 2), the maximum dimension L in the length direction of the LED core particle₁₂＞(Δ×2)，W₁The line width of a first conductive circuit electrically combined with the first electrode is consistent with the width direction of the LED core particles;

the maximum dimension L of the second electrode along the length direction of the LED core particle₂₁＞(W₂+ Δ × 2), the maximum dimension L in the width direction of the LED core particle₂₂＞(Δ×2)，W₂Is the line width of a second conductive circuit electrically combined with the second electrode, and the line width direction of the second conductive circuit andthe length directions of the LED core particles are consistent.

7. The Mini-LED display module of claim 6, wherein: the length L of the LED core particle_c1＞(W₂+ Δ × 4), width L_c2＞(W₁+ Δ × 2); and/or, W₁＝W₂。

8. The Mini-LED display module of claim 2, wherein: the LED core particles are square, the first electrodes and the second electrodes of the LED core particles are arranged along a first direction and a second direction respectively, the first direction and the second direction are parallel to a first edge and a second edge of the LED core particles respectively, and the first edge is intersected with the second edge;

wherein a maximum dimension L of the first electrode along the first direction₃₁＞(W₁+ Δ × 2), the maximum dimension L in said second direction₃₂＞Δ，W₁The line width of a first conductive circuit electrically combined with the first electrode is the first direction;

a maximum dimension L of the second electrode along the second direction₄₁＞(W₂+ Δ × 2), the maximum dimension L along said first direction₂₂＞A，W₂The line width of the second conductive circuit electrically combined with the second electrode is the second direction.

9. The Mini-LED display module of claim 8, wherein: the lengths of the first side and the second side of the LED core particle are both greater than (delta x 3); and/or, W₁＝W₂。

10. A design method for alignment tolerance of a Mini-LED core particle electrode is characterized by comprising the following steps:

setting an alignment allowable error delta between each electrode of each LED core particle in the Mini-LED display module and a corresponding conductive circuit;

and setting the maximum dimension L of each electrode along the line width direction of the corresponding conductive line to be larger than (W + delta x 2), wherein W is the line width of the corresponding conductive line, so that the electrode is electrically contacted with the corresponding conductive line under the condition that the alignment between any electrode and the corresponding conductive line has errors.

Technical Field

The invention belongs to the technical field of semiconductor illumination, and particularly relates to a Mini-LED display module and an alignment tolerance design method of a core particle electrode of the Mini-LED display module.

Background

The Mini-LED technology based on semiconductor technology is a new type of high brightness and high resolution display technology. The Mini-LED has the size of 50-200 mu m, can be used as an array pixel display and a backlight source of an LCD, and has wide market prospect in the fields of televisions, display screens, notebooks and the like. Mini-LEDs have many advantages compared to LCD and OLED displays, such as: high brightness, low power, long service life and high thermal stability. However, Mini-LEDs are much smaller and have a relatively higher density than conventional LED devices, which brings many technical and physical challenges, such as mass transfer technology, full color display, etc.

In practical engineering application, when a huge amount of Mini-LED core particles are transferred, the core particles are not completely and uniformly distributed on a blue film or a UV film, the core particles are deviated up and down, left and right and twisted, the huge amount of core particles can also slightly deviate in the process of transferring to a substrate, and the butt joint dislocation of metal connecting wires and metal electrodes of the deviated core particles can cause short circuit and open circuit of row/column electric connection of the Mini-LED display module group, thereby causing abnormal Mini-LED display.

Disclosure of Invention

The invention mainly aims to provide a Mini-LED display module and an alignment tolerance design method of a core particle electrode thereof, so as to overcome the defects of the prior art.

In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:

the embodiment of the invention provides a Mini-LED display module, which comprises a plurality of LED core particles which are arranged in an array, wherein each electrode of each LED core particle is electrically contacted with a corresponding conducting circuit; the method is characterized in that: and the maximum dimension L > (W + delta x 2) of each electrode along the line width direction of the corresponding conductive line, wherein W is the line width of the corresponding conductive line, and delta is the alignment tolerance between each electrode and the corresponding conductive line.

The embodiment of the invention also provides a design method for alignment tolerance of the Mini-LED core particle electrode, which comprises the following steps:

setting an alignment allowable error delta between each electrode of each LED core particle in the Mini-LED display module and a corresponding conductive circuit;

and setting the maximum dimension L of each electrode along the line width direction of the corresponding conductive line to be larger than (W + delta x 2), wherein W is the line width of the corresponding conductive line, so that the electrode is electrically contacted with the corresponding conductive line under the condition that the alignment between any electrode and the corresponding conductive line has errors.

Compared with the prior art, the invention has the beneficial effects that:

(1) the LED core particle electrode alignment tolerance design provided by the invention can still ensure the alignment connection of the core particle electrode and the corresponding conductive circuit when the core particle deviates, and has high reliability.

(2) The red, green and blue strip-shaped LED core particles designed by the method can be used as a light-emitting unit to be applied to high-density Mini-LED display after being combined.

(3) The electrodes at the two ends of the strip-shaped LED core particles can be connected by metal wires, so that the parasitic resistance of rows/columns of the Mini-LED display module can be reduced, the rows/columns of the Mini-LED display module can be connected with more LED core particles in series under the same voltage condition, and the integration level is high.

(4) According to the square LED core particles, the insulation areas can be overlapped and utilized, the size of the core particles can be designed to be smaller, and more LED core particles can be integrated into a Mini-LED display module with the same size, so that the resolution of the Mini-LED display module is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic view of an LED core particle structure of a Mini-LED display module in embodiment 1 of the present invention;

FIG. 2 is a schematic view showing the case where the LED core particles are shifted in example 1 of the present invention;

fig. 3 is a schematic view of an LED core particle structure of a Mini-LED display module in embodiment 2 of the present invention;

fig. 4 is a schematic view showing the case where the LED core particles are shifted in embodiment 2 of the present invention.

Description of reference numerals: the device comprises a 1-P type electrode, a 2-N type electrode, a 3-first conducting circuit, a 4-second conducting circuit and a 5-insulating layer.

Detailed Description

In view of the defects of the prior art, the inventor of the present invention has made extensive research and practice to propose the technical solution of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.

The embodiment of the invention provides a Mini-LED display module, which comprises a plurality of LED core particles which are arranged in an array, wherein each electrode of each LED core particle is electrically contacted with a corresponding conducting circuit; and the maximum dimension L > (W + delta x 2) of each electrode along the line width direction of the corresponding conductive line, wherein W is the line width of the corresponding conductive line, and delta is the alignment tolerance between each electrode and the corresponding conductive line.

Further, the conductive line includes:

a first conductive trace electrically coupled to the first electrode of the LED core particle,

and the second conductive circuit is electrically combined with the second electrode of the LED core particle.

Further, the first conductive traces are electrically coupled to at least two first electrodes, and the second conductive traces are electrically coupled to a corresponding one of the second electrodes.

Further, a plurality of the LED core particles are arranged in series and/or in parallel.

In one embodiment, the first electrode may be a P-type electrode and the second electrode is an N-type electrode.

In another embodiment, the first electrode may be an N-type electrode and the second electrode is a P-type electrode.

The first conductive circuit and the second conductive circuit may adopt metal wires.

In one embodiment, the LED core particle is a strip shape, and the first electrode and the second electrode of the LED core particle extend along the width direction and the length direction of the LED core particle, respectively;

wherein the first electrode is arranged along the width direction of the LED core particlesMaximum dimension L of₁₁＞(W₁+ Δ × 2), the maximum dimension L in the length direction of the LED core particle₁₂＞(Δ×2)，W₁The line width of a first conductive circuit electrically combined with the first electrode is consistent with the width direction of the LED core particles;

the maximum dimension L of the second electrode along the length direction of the LED core particle₂₁＞(W₂+ Δ × 2), the maximum dimension L in the width direction of the LED core particle₂₂＞(Δ×2)，W₂The line width of the second conductive circuit is electrically combined with the second electrode, and the line width direction of the second conductive circuit is consistent with the length direction of the LED core particles.

Further, the length L of the LED core particle_c1＞(W₂+ Δ × 4), width L_c2＞(W₁+Δ×2)。

Wherein, W₁＝W₂。

In some cases, W₁And W₂Or may not be equal.

In another embodiment, the LED core particle is square, the first and second electrodes of the LED core particle are respectively disposed along a first direction and a second direction, the first and second directions are respectively parallel to a first side and a second side of the LED core particle, and the first side and the second side intersect;

wherein a maximum dimension L of the first electrode along the first direction₃₁＞(W₁+ Δ × 2), the maximum dimension L in said second direction₃₂＞Δ，W₁The line width of a first conductive circuit electrically combined with the first electrode is the first direction;

a maximum dimension L of the second electrode along the second direction₄₁＞(W₂+ Δ × 2), the maximum dimension L along said first direction₂₂＞Δ，W₂The line width of the second conductive circuit electrically combined with the second electrode is the second direction.

Further, the lengths of the first side and the second side of the LED core particle are both larger than (delta x 3).

Wherein, W₁＝W₂。

In some cases, W₁And W₂Or may not be equal.

It should be noted that the pattern of the electrode may be in various shapes, such as rectangle, triangle, wedge, etc., as long as the application requirements are met.

The embodiment of the invention also provides a design method for alignment tolerance of the Mini-LED core particle electrode, which comprises the following steps:

setting an alignment allowable error delta between each electrode of each LED core particle in the Mini-LED display module and a corresponding conductive circuit;

and setting the maximum dimension L of each electrode along the line width direction of the corresponding conductive line to be larger than (W + delta x 2), wherein W is the line width of the corresponding conductive line, so that the electrode is electrically contacted with the corresponding conductive line under the condition that the alignment between any electrode and the corresponding conductive line has errors.

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Example 1

Referring to fig. 1, an LED core particle structure of a Mini-LED display module in this embodiment is shown, the LED core particle is a strip shape, two P-type electrodes 1 are disposed on the LED core particle, an N-type electrode 2 is disposed between the two P-type electrodes 1, and the P-type electrode 1 and the N-type electrode 2 extend along the width direction and the length direction of the LED core particle, respectively.

The P-type electrode 1 and the N-type electrode 2 are square, the P-type electrode 1 is electrically connected with the first conductive circuit 3, and the N-type electrode 2 is electrically connected with the second conductive circuit 4.

Wherein the P-type electrode 1 is arranged along the LED coreMaximum dimension L in the direction of grain width₁₁＞(W₁+ Δ × 2), maximum dimension L along the length direction of the LED core particle₁₂(Δ × 2), maximum dimension L of N-type electrode 2 in the longitudinal direction of LED core₂₁＞(W₂+ Δ × 2), maximum dimension L in the width direction of the LED core particle₂₂＞(Δ×2)。

And the length L of the LED core particle_c1＞(W₂+ Δ × 4), width L_c2＞(W₁+Δ×2)。

Wherein Δ is an alignment tolerance between the P-type electrode 1 and the first conductive trace 3 or between the N-type electrode 2 and the second conductive trace 4, W₁Is the line width, W, of the first conductive line 3₂Is the line width, W, of the second conductive line 4₁＝W₂。

In the LED core particle structure in this embodiment, when the upper, lower, left, and right offsets as shown in fig. 2 occur, the alignment connection between each electrode and the corresponding conductive line can still be ensured, and the short circuit and open circuit are not caused.

The red, green and blue LED core particles adopting the redundancy design can be used as a light-emitting unit to be applied to high-density Mini-LED display after being combined. In addition, the electrodes at the two ends of the strip-shaped LED core grain can be connected by adopting metal wires in the process so as to reduce the parasitic resistance of rows/columns of the Mini-LED display module. Under the same voltage condition, the rows/columns of the Mini-LED display module adopting the scheme can be connected with more LED core particles in series.

Example 2

Referring to fig. 3, the LED core particle structure of the Mini-LED display module in this embodiment is shown, the LED core particle is square, a pair of P-type electrodes 1 and a pair of N-type electrodes 2 are disposed on the LED core particle, the P-type electrodes 1 and the N-type electrodes 2 are disposed along four sides of the LED core particle, and the electrodes are electrically isolated from each other by an insulating layer 5.

The P-type electrode 1 and the N-type electrode 2 are regular trapezoids, the P-type electrode 1 is electrically connected with the first conductive circuit 3, and the N-type electrode 2 is electrically connected with the second conductive circuit 4.

Wherein, the maximum size L of the P-type electrode 1 along the transverse side length direction of the LED core particle₃₁＞(W₁+ Δ × 2), along the LED coreMaximum dimension L of adjacent sides of grains in length direction₃₂The maximum size L of the N-type electrode 2 along the longitudinal side length direction of the LED core grain is larger than delta₄₁＞(W₂+ Δ × 2), maximum dimension L in the lateral side length direction of the LED core grain₃₂＞Δ。

And the side length of the LED core grain is larger than (delta multiplied by 3).

Wherein, W₁Is the line width, W, of the first conductive line 3₂Is the line width, W, of the second conductive line 4₁＝W₂。

In the LED core particle structure in this embodiment, when the upper, lower, left, and right offsets as shown in fig. 4 occur, the alignment connection between each electrode and the corresponding conductive line can still be ensured, and the short circuit and open circuit are not caused.

The LED core particles in the embodiment are covered by the insulating layer 5 except the electrodes, when the LED core particles deviate, the trapezoidal electrode design enables the corresponding conductive circuit electrically connected with the electrodes to be lapped on the insulating layer 5, and the short circuit phenomenon in row/column connection can be effectively avoided. In addition, compared with the design scheme of electrode alignment tolerance of the strip-shaped LED core particles in embodiment 1, the insulating regions in this embodiment can be overlapped and utilized, and the size of the LED core particles can be designed to be smaller, so that more LED core particles can be integrated into a Mini-LED display module with the same size, thereby improving the resolution of the Mini-LED display module.

It should be understood that the technical solution of the present invention is not limited to the above-mentioned specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention without departing from the spirit of the present invention and the protection scope of the claims.