Abstract: A display panel and a display apparatus are provided. The display panel includes a display layer, a package layer, and a functional film layer that are stacked in sequence, where the display layer includes a plurality of light emitting devices. The functional film layer is located on a side of the package layer that is far away from the display layer, the functional film layer includes at least one elastic recovery layer, and the display panel includes a bendable area. The elastic recovery layer is at least located in the bendable area. The elastic recovery layer can assist another film layer in performing arching recovery after bending, thereby reducing a risk that repeated bending causes film layer stripping or rupture and the arching of the bending part cannot be recovered in the flattened state.

Abstract: The present invention discloses a drilling system and method of a submarine drilling rig, relating to the technical field of drilling equipment. The system includes a barge, an umbilical cable, a submarine device and a drilling device; where the barge is loaded with a pneumatic-electric-hydraulic control device and a mud treatment device which are respectively connected to the submarine device through the umbilical cable; and the submarine device includes a submarine traveling device, a coiled tubing roller, a derrick, a centralized valve seat, a drill bit replacement device, a wellhead device and a casing rack. The centralized valve seat is connected to the umbilical cable for shunting mud, cement and electrical signals conveyed by the umbilical cable. The derrick is installed above the wellhead device, respectively matched with the drill bit replacement device and the casing rack for replacing drill bits and conveying and withdrawing casings.

Abstract: A focus-adjustable lighting device includes a housing, a light source module, a focus-adjustable mechanism, and a light guiding unit. The focus-adjustable mechanism includes a rotating member and a first limiting member. The rotating member is rotatable relative to the housing, and has a semi-helical guide groove, and an engaging unit that includes a plurality of spaced-apart concave grooves corresponding in position to the semi-helical guide groove. The first limiting member includes a first limiting portion disposed in the semi-helical guide groove, and a second limiting portion spaced apart from the first limiting portion. The light guiding unit is movable with the rotating member.

Abstract: A focus-adjustable lighting device includes a housing, a light source module, a focus-adjustable mechanism, and a light guiding unit. The focus-adjustable mechanism includes a rotating member and a first limiting member. The rotating member is rotatable relative to the housing, and has a semi-helical guide groove, and an engaging unit that includes a plurality of spaced-apart concave grooves corresponding in position to the semi-helical guide groove. The first limiting member includes a first limiting portion disposed in the semi-helical guide groove, and a second limiting portion spaced apart from the first limiting portion. The light guiding unit is movable with the rotating member.

Abstract: The present invention discloses a drilling system and method of a submarine drilling rig, relating to the technical field of drilling equipment. The system includes a barge, an umbilical cable, a submarine device and a drilling device; where the barge is loaded with a pneumatic-electric-hydraulic control device and a mud treatment device which are respectively connected to the submarine device through the umbilical cable; and the submarine device includes a submarine traveling device, a coiled tubing roller, a derrick, a centralized valve seat, a drill bit replacement device, a wellhead device and a casing rack. The centralized valve seat is connected to the umbilical cable for shunting mud, cement and electrical signals conveyed by the umbilical cable. The derrick is installed above the wellhead device, respectively matched with the drill bit replacement device and the casing rack for replacing drill bits and conveying and withdrawing casings.