TWI557701B - Printing mask adapted to manufacture light emitting element array display and light emitting element array display - Google Patents

Description

Printed plate mold and light-emitting element array display applied to manufacturing light-emitting element array display

The present invention relates to a printed board module and a light-emitting element array display, and more particularly to a printed board mold which can improve brightness uniformity, resolution and process yield of a light-emitting element array display.

With the advancement of semiconductor technology, today's light-emitting components (such as light-emitting diodes) have high-intensity output, plus light-emitting components such as long life, small size, high shock resistance, low waste heat and low power consumption. It has been widely used as an indicator or light source in homes and various devices. In recent years, light-emitting elements have been developed toward high power, and thus their application fields have expanded to road lighting, large outdoor billboards, traffic lights, and related fields. Nowadays, the light-emitting elements have become the main illumination source and a common display element that have both power saving and environmental protection functions.

However, in the conventional structure in which a light-emitting element array is used as a display, there is a problem of brightness uniformity, resolution, and process yield. Therefore, how to solve the above problems has become an urgent problem to be solved.

The invention provides a printing plate mold and a light-emitting element array display produced by using the printing plate mold of the invention, which helps to improve the brightness uniformity of the light-emitting element, and improves the resolution of the light-emitting element array display, so that the overall process yield is improved. And make the manufacturing cost lower.

The invention provides a printing plate mold comprising a shielding area and an opening area surrounded by the shielding area, wherein the opening area has a central area and a first edge area and a second parallel to a first direction An edge region, the first edge region and the second edge region are located on opposite sides of the central region, the central region having a first aperture D1 parallel to a second direction X2, the first edge region being parallel to the second The direction X2 has a second aperture D2. The second edge region 150 has a third aperture D3 parallel to the second direction X2. The aperture region has a fourth aperture D4 parallel to a first direction. The first direction It is substantially orthogonal to the second direction, and D2>D1 and D3>D1.

The present invention provides a light-emitting element array display comprising a substrate, a light-emitting element is disposed on the substrate, and a wavelength conversion layer is disposed on the light-emitting element, the wavelength conversion layer is formed by printing, and the printing method is as described above. Printing plate mold.

Based on the above, the present invention utilizes a printing plate mold including a shielding area, and an opening area surrounded by the shielding area, wherein the opening area has a central area and a first edge area parallel to a first direction and Second side a rim region having a first aperture D1 parallel to a second direction X2, the first edge region having a second aperture D2 parallel to the second direction X2, the second edge region 150 being parallel to the second The direction X2 has a third aperture D3. The aperture region has a fourth aperture D4 parallel to a first direction, the first direction being substantially orthogonal to the second direction, and D2>D1 and D3>D1. And a light-emitting element array display molded using such a printing plate will have the advantages of high brightness uniformity, high resolution, and high yield.

The above described features and advantages of the invention will be apparent from the following description.

1 to 2, FIG. 1 is a top view of a light-emitting element array display according to an embodiment of the present invention, and FIG. 2 is a side view of the line A-A' of FIG. The light-emitting element array display 10 has a plurality of light-emitting elements 101 disposed on the substrate 102. The substrate 102 includes electronic components (not shown). The light-emitting element 101 is provided with a wavelength conversion layer 103. The wavelength conversion layer 103 is formed by using a printing method. In view of the fact that the size of the light-emitting element 101 is smaller and smaller, the density is getting larger and larger, the resolution is increased, and the pitch of each of the light-emitting elements 101 is reduced; therefore, the pitch of each wavelength conversion layer 103 is also reduced. The amount of each wavelength conversion layer 103 must be accurately controlled, otherwise the different wavelength conversion layers 103 will produce a color mixture.

Please refer to Figure 3. Figure 3 is a top plan view of a printing plate mold of the present invention. The wavelength conversion layer 103 is formed by using a printing method. A printed board die 100 is disposed above the substrate 102 and the light emitting element 101. The open area 110 of the printed board mold 100 is surrounded by the shielding area 120, and the opening area 110 is in the parallel first direction X1. There is a central region 130, and a first edge region 140 and a second edge region 150 corresponding to both sides of the central region 130, the second direction X2 and the first direction X1 being substantially orthogonal.

The aperture of the central region 130 parallel to the second direction X2 is D1, the aperture of the first edge region 140 parallel to the second direction X2 is D2, the aperture of the second edge region 150 parallel to the second direction X2 is D3, and the aperture region 110 The aperture parallel to the first direction X1 is D4; in general, the amount of printing on the substrate 102 corresponding to the central region 130 may be more than the amount of printing corresponding to the first edge region 140 and the second edge region 150, this embodiment It is proposed that D2>D1 and D3>D1, that is, the aperture D2 of the first edge region 140 is larger than the aperture D1 of the central region 130, and the aperture D3 of the second edge region 150 is larger than the aperture D1 of the central region 130; thus, the substrate 102 The amount of printing of the wavelength conversion layer 103 corresponding to the central region 130 can be relatively reduced, further reducing the probability of color mixing of the respective wavelength conversion layers 103. The present invention does not limit the wavelength of light emitted by the light-emitting element 101, nor does it limit that all of the light-emitting elements 101 must emit light of the same wavelength; in addition, the wavelength conversion layer 103 may include wavelength-converting particles, and the wavelength-converting particles may be Light powder, quantum dots or a combination of the foregoing. In another embodiment, the aperture of the opening region 110 parallel to the first direction X1 is D4, and D4>D2 and D4>D3, that is, the long side of the opening region 110 is parallel to the first direction X1, the short side. Parallel to the second direction X2. In addition, the aperture D2 of the first edge region 140 and the aperture D3 of the second edge region 150 of the present invention may be equal or unequal, that is, D2=D3 or D2≠D3, as long as D2>D1 and D3>D1 Just fine.

In yet another embodiment, the wavelength converting layer 103 comprises wavelength converting particles having a particle size of <10 [mu]m. These wavelength converting particles may be phosphor powder, quantum dots, or a combination thereof. In other embodiments, the aperture D1 of the central region 130 is larger than the aperture of the wavelength-converting particles to allow it to pass, but the aperture D1 of the central region 130 is not more than 50 μm under the premise that the display requires high resolution, that is, the relationship is satisfied. Formula: 50 μm ≧ D1 ≧ 10 μm.

In a further embodiment, considering the uniformity of the wavelength conversion layer 103 printed on the substrate 102, the aperture D1 of the central region 130 and the aperture D2 of the first edge region 140 should not be too different, and the following relationship can be satisfied: D2>D1 ≧0.3*D2, preferably satisfies the following relationship: 0.5*D2>D1≧0.3*D2. Thus, the wavelength conversion layer 103 printed on the substrate 102 can have a better uniformity and is less likely to be mixed with the adjacent other wavelength conversion layer 103.

Please refer to FIG. 4A and FIG. 4B, which are top views of a printing plate mold according to another embodiment of the present invention. The same points as in FIG. 3 will not be described again here. The printing plate mold 200 of Fig. 4A has an open area 210 of an I-shaped structure, and the central portion 230 has a pore size of a single value. The printing plate die 300 of FIG. 4B has an open area 310, a central area 330, a first edge area 340, and a second edge area 350. The first edge area 340 and the second edge area 350 are arc-shaped at an end away from the central area 330. It should be noted that the aperture D2 of the first edge region 340 of the present embodiment, the aperture D1 of the central region 330, and the aperture D3 of the second edge region 350, the aperture D1 of the central region 330, refer to the first edge region 340 and The aperture of the second edge region 350 may be larger than the maximum aperture in the central region 330, and the aperture measurement directions are based on the parallel second direction X2.

Please refer to FIG. 5, and the same points as FIG. 3 are not described herein again. The printed board film 400 of the present embodiment has an open area 410 having two or more central areas 430 interposed between the first edge area 440 and the second edge area 450, between any two central areas 430. A connection region 460, and the aperture D1 of any central region 430 must satisfy the relationship D2 > D1 and D3 > D1, D2 is the aperture of the first edge region 440, and D3 is the aperture of the second edge region 450. The printing plate mold of the present invention may be a steel plate, but is not limited thereto.

In short, through the printing plate mold of the present invention, the printing density and uniformity of the wavelength conversion layer are increased, and the wavelength conversion layers are not easily mixed with each other, thereby improving the process yield and reducing the manufacturing cost. Thereby, the brightness of the light-emitting element array display is further made uniform, and the resolution is remarkably improved.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

10‧‧‧Light-emitting element array display
101‧‧‧Lighting elements
102‧‧‧Substrate
103‧‧‧wavelength conversion layer
100, 200, 300, 400‧‧‧printing plate mould
110, 210, 310, 410‧‧‧open areas
120‧‧‧ shaded area
130, 230, 330, 430‧‧‧ Central area
140, 340, 440‧‧‧ first marginal area
150, 350, 450‧‧‧ second marginal area
D1, D2, D3, D4‧‧‧ aperture
X1‧‧‧ first direction
X2‧‧‧ second direction

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a top plan view of a light-emitting element array display according to an embodiment of the present invention.

Figure 2 is a side elevational view of Figure 1 taken along line I-I'.

Figure 3 is a top plan view of a printing plate mold in accordance with an embodiment of the present invention.

4A-4B are top views of a printing plate mold of another embodiment of the present invention.

Figure 5 is a top plan view of a printing plate mold in accordance with another embodiment of the present invention.

100‧‧‧Printing plate mould

110‧‧‧Open area

120‧‧‧ shaded area

130‧‧‧Central area

140‧‧‧First marginal area

150‧‧‧second marginal area

D1, D2, D3, D4‧‧‧ aperture

X1‧‧‧ first direction

X2‧‧‧ second direction

Claims (11)

A printing plate mold comprising: a shielding area; and an opening area surrounded by the shielding area, wherein the opening area has a central area and a first edge area and a second edge area parallel to a first direction The first edge region and the second edge region are located on opposite sides of the central region, the central region having a first aperture D1 parallel to a second direction X2, the first edge region being parallel to the second direction X2 Having a second aperture D2, the second edge region having a third aperture D3 parallel to the second direction X2, the aperture region having a fourth aperture D4 parallel to a first direction, the first direction being substantially positive It is in the second direction, and D2>D1 and D3>D1. The printing plate mold of claim 1, wherein D4>D2 and D4>D3. The printing plate mold according to claim 1, wherein 50 μm ≧ D1 ≧ 10 μm. The printing plate mold according to claim 1, wherein D2>D1≧0.3*D2. The printing plate mold according to claim 1, wherein 0.5*D2>D1≧0.3*D2. The printing plate mold of claim 1, wherein D2 = D3. The printing plate mold according to claim 1, wherein D2≠D3. The printing plate mold according to claim 1, comprising at least two central regions, wherein the central regions are between the first edge region and the second edge region, and at least one connecting region is located at any two Between these central areas. A light-emitting element array display comprising: a substrate; a light-emitting element disposed on the substrate; and a wavelength conversion layer disposed on the light-emitting element, the wavelength conversion layer being formed by printing, and the printing plate mode used by the printing mode For example, one of the first to eighth items of the patent application scope. The light-emitting element array display according to claim 9, wherein the wavelength conversion layer contains wavelength-converting particles having a particle diameter of <10 μm. The light-emitting element array display according to claim 10, wherein the wavelength-converting particles are phosphor powder, quantum dots or a combination thereof.