Patent ID: 11865784
Assignee: SHANGHAI FUSION TECH CO., LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 6:
7. A 3D printer comprising a light-curing printer display device, the light-curing printer display device comprising:
a screen;
a light source assembly arranged on a back side of the screen,
the light source assembly comprising a plurality of Light Emitting Diode (LED) light sources independent of each other; and

a shielding plate arranged between the screen and the light source assembly,
the shielding plate being provided with a plurality of light holes in the same quantity number as that of the plurality of LED light sources, and
each of the plurality of light holes is arranged opposite to a corresponding LED light source;

wherein:
a diameter of at least one of the plurality of light holes is H1/H×2R;
H1 is a first distance between an upper surface of the shielding plate and the plurality of LED light sources;
H is a second distance from the plurality of LED light sources to the screen;
R is a radius of a round light spot projected by at least one of the plurality of LED light sources through the at least one of the plurality of light holes; and
following constraint condition is satisfied: H1<√{square root over (3)}/2H.