Build plate assemblies for continuous liquid interphase printing having lighting panels and related methods, systems and devices

An apparatus for forming a three-dimensional object from a polymerizable liquid, comprising:

• (a) a support;
• (b) a carrier operatively associated with said support on which carrier said three-dimensional object is formed;
• (c) an optically transparent member having a build surface, with said build surface and said carrier defining a build region therebetween;
• (d) a liquid polymer supply operatively associated with said build surface and configured to supply liquid polymer into said build region for solidification or polymerization;
• (e) a radiation source configured to irradiate said build region through said optically transparent member to form a solid polymer from said polymerizable liquid;
• (f) optionally at least one drive operatively associated with either said transparent member or said carrier;
• (g) a controller operatively associated with said carrier, and/or optionally said at least one drive, and said radiation source for advancing said carrier away from said build surface to form said three-dimensional object from said solid polymer,
• wherein said optically transparent member comprises a build plate having an optically transparent, gas-impermeable planar screen or base of comprising:
• a lighting panel having individually addressable pixels configured to selectively emit light and/or transmit light from illumination below the pixels to a top surface top surface of the lighting panel;
• a rigid, optically transparent, gas-impermeable planar screen or base having an upper surface and a lower surface that is affixed to the top surface of the lighting panel;
• a flexible, optically transparent, gas-permeable sheet having upper and lower surfaces, the upper surface comprising a build surface for forming a three-dimensional object, the sheet lower surface positioned opposite the base, wherein the build plate is configured to permit gas flow to the build surface;
• and
• the radiation source comprises the planar screen.