Organic light-emitting diode (OLED) illuminating lamp sheet and manufacturing method thereof

A method for manufacturing an organic light-emitting diode (OLED) illuminating lamp sheet, comprising:

• manufacturing an array substrate, the array substrate includes a first base and a first electrode formed on the first base, wherein the manufacturing the array substrate includes:
• forming a first insulating layer on the first base;
• forming a pattern of an electrode wiring on the first insulating layer;
• forming a second insulating layer on the pattern of the electrode wiring, and forming a second insulating layer through hole by patterning the second insulating layer;
• forming a pattern of an impedance wiring electrode on the patterned second insulating layer, the impedance wiring electrode is electrically connected with the electrode wiring via the second insulating layer through hole;
• forming a third insulating layer on the pattern of the impedance wiring electrode, and forming a third insulating layer through hole by patterning the third insulating layer;
• forming a pattern of the first electrode and an external electrode on the patterned third insulating layer, the first electrode is electrically connected with the impedance wiring electrode via the third insulating layer through hole;
• and
• forming a pattern of a pixel define region by forming pixel defining layer (PDL) on the pattern of the first electrode and the external electrode,
• wherein the external electrode includes a partially overlapping and directly connecting region which is partially overlapped with the second electrode and directly connected with the second electrode by the pixel defining layer and a lead-out electrode region, the pixel defining layer includes a first through hole corresponding to the partially overlapping and directly connecting region and a second through hole corresponding to the lead-out electrode region;
• bonding an electrostatic film to a surface of the array substrate provided with the first electrode, forming a patterned electrostatic film by patterning the electrostatic film, and forming an organic film layer by taking the patterned electrostatic film as a mask;
• forming a second electrode and obtaining an OLED element;
• and
• encapsulating the OLED element,
• wherein the forming the organic film layer and the second electrode includes:
• forming a film of the organic film layer which covers the array substrate after forming the patterned electrostatic film,
• under a protective atmosphere, removing the patterned electrostatic film and the film of the organic film layer formed on the patterned electrostatic film in the partially overlapping and directly connecting region, to expose the external electrode in partially overlapping and directly connecting region,
• forming a film of the second electrode on a side of the array substrate where the patterned electrostatic film is located, wherein the film of the second electrode covers the first through hole so that the second electrode is connected with the external electrode in the partially overlapping and directly connecting region by the pixel defining layer and the second electrode is partially overlapped with the external electrode;
• removing the patterned electrostatic film, and the film of the organic film layer and the film of the second electrode on the patterned electrostatic film in a mask region except the lead-out electrode region in a protective atmosphere and obtaining the organic film layer and the second electrode.