UV inkjet printing method providing stacked printing edge with smooth effect

Abstract

An ultraviolet (UV) inkjet printing method providing a stacked printing edge with a smooth effect is disclosed. After an inkjet head is controlled to print an image X on a substrate, a distance between the inkjet head and a surface of the substrate is kept unchanged, and the inkjet head is again controlled to print bi-directionally for at least once on the image X. After completing the above steps, the inkjet head is further controlled to print an image X on the image X on the substrate, wherein the image X consists of pixels expanded from the image X, such that the image X completely covers the image X, forming a smooth arc surface at peripheral edges of the image X.

Claims

1. An ultraviolet (UV) inkjet printing method providing a stacked printing edge with a smooth edge effect, comprising: step (a): controlling an inkjet head to print an image X on a substrate; step (b): keeping a distance between the inkjet head and a surface of the substrate unchanged, and bi-directionally printing the image X for at least once; and step (c): after completing the above steps, controlling the same inkjet head used for forming the image X to print an image X on the image X at a same position as the image X on the substrate; wherein, the image X is a multi-color image, and the image X is a similar multi-color image of the image X and consists of Z pixels expanded from the image X, where Z1 pixel, such that the image X completely covers the image X, forming a smooth arc surface at peripheral edges of the image X.

2. The UV inkjet printing method providing the stacked printing edge with the smooth effect according to claim 1, wherein the inkjet head is an inkjet head having one single output or multiple outputs.

3. The UV inkjet printing method providing the stacked printing edge with the smooth effect according to claim 1, wherein in step (c), the distance between the inkjet head and the surface of the substrate is kept unchanged as in step (b).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a flowchart according to an embodiment of the present invention; and

(2) FIG. 2 is a schematic diagram showing states of successive operations in an implementation according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

(3) FIG. 1 and FIG. 2 show an ultraviolet (UV) inkjet printing method providing a stacked printing edge with a smooth effect according to a preferred embodiment.

(4) The process of a UV inkjet printing method providing a stacked printing edge with a smooth effect of the present invention includes the following steps.

(5) In step a, an inkjet head is controlled to print an image X is on a substrate.

(6) In step b: a distance between the inkjet head and a surface of the substrate is kept unchanged, and the above image X is printed bi-directionally for at least once.

(7) In step c, after completing the above steps, the inkjet head is again controlled to print an image X on the image X on the substrate.

(8) The inkjet head is an inkjet head with one single output or multiple outputs. The image X consists of pixels expanded from the image X, such that the image X completely covers the image X, forming a smooth arc surface at peripheral edges of the image X.

(9) In implementation, as shown in FIG. 2, a UV printer having N inkjet heads is provided. After a substrate 1 is placed on a printing platform of the UV inkjet printer, M inkjet heads (where NM1) are controlled to simultaneously print a same image X 2 on the substrate 1, and, under a condition that distances between the inkjet heads and a surface of the substrate 1 are kept unchanged, I number of inkjet heads (where NI1) are controlled to bi-directionally print the image X 2 at the same position on the substrate 1 for K number of times (where K1), such that the image X 2 on the substrate 1 is repeatedly stacked and becomes cured on the substrate 1. After completing the above steps, J number of inkjet heads (where NJ1) are controlled to print an image X 3 at the same position as the image X 2 on the substrate 1, wherein the image X 3 is a similar image consisting of pixels expanded from the image X 2, such that the image X 3 completely covers the peripheral edges of the image X and a smooth arc surface is naturally formed at the peripheral edges of the image X 2.

(10) Thus, with the above design, a smooth arc surface can be formed peripheral edges of the image presented after printing on the substrate. Thus, when the above is applied to a special printed product such as 3D or emboss printing, the product has higher precision and provides a finer feel to a user.

(11) The above description includes details of the embodiment and technical means used in the present invention, and numerous variations and modifications that can be derived on the basis of the disclosure or teaching of the disclosure are regarded as equivalent changes of the concept of the present invention. Further, the effects provided by such variations and modifications do not exceed beyond the substantial spirit covered by the description and drawings, and are to be construed as being encompassed within the technical field of the present invention.

(12) In conclusion, on the basis of the above disclosure, the UV inkjet printing method providing a stacked printing edge with a smooth effect of the present invention achieves the expected object and is thus industrially applicable. Therefore, a patent application is filed accordingly.