Disclosed are a display panel, a display device, and a terminal apparatus. The display panel comprises a display substrate having a backlight surface and a main flexible circuit board. The main flexible circuit board comprises a connection section, a fixed section and a test section. The connection section is arranged on the backlight surface, and has an outer peripheral surface comprising a first side and a second side opposite to each other. The fixed section is attached and fixed onto the backlight surface, and having one end connected to the first side and another end extending towards an end of the first side away from the second side. The test section has one end connected to the first side, and another end comprising a connection port.

A method of forming a structural honeycomb includes cutting and folding a substrate sheet according to predetermined cutting and folding patterns and fold angles that cause the sheet to form a honeycomb having cells that each have at least one face abutting, or nearly abutting, the face of another cell. The honeycomb is then stabilized by joining abutting, or nearly abutting, faces to hold the honeycomb together. The honeycomb may have a prespecified three-dimensional shape. The folding pattern may include corrugation, canted corrugation, or zig-zag folds. Joining may employ fixed and/or reversible joinery, including slotted cross section, tabbed strip, angled strip, integral skin, sewn, or laced. At least some folds may be partially-closed to create bends and twists in the honeycomb structure. Some surfaces of the honeycomb may be covered with a skin or face sheet. The substrate sheet may have flexible electronic traces.

A display device includes a display panel, a first circuit board, a control unit disposed on the first circuit board, a second circuit board, and a coupling film which electrically couples the control unit and the second circuit board to each other. The coupling film includes a first coupling part including a first region attached to the first circuit board, and a second region overlapping the display panel when viewed in a thickness direction of the display panel, a second coupling part including a third region attached to the second circuit board, and a fourth region overlapping the display panel when viewed in the thickness direction of the display panel, and a third coupling part coupled to each of the second region and the fourth region to electrically couple the first coupling part and the second coupling part to each other.

A device includes comprising first and second printed circuit boards. Walls couple the first and second printed circuit boards to each other and define a first cavity between the first and second printed circuit boards. Electric conductors associated with the walls electrically connect the the first and second printed circuit boards. An integrated circuit chip is mounted to a first surface of the first integrated circuit board in the first cavity. The integrated circuit chip is electrically connected to conductive tracks of the first surface of the first printed circuit board. Surface-mounted components are mounted on top of and in contact with conductive tracks of a first surface of the second printed circuit board. The first surfaces of the first and second printed circuit boards are arranged facing towards each other. The first and second printed circuit boards may form rigid components of a flex-rigid type printed circuit board.

An optical unit includes a movable body including an optical module, a fixed body, a support mechanism, a flexible printed circuit board, and a fixing part. The fixing part is superposed on a bent part formed by bending the flexible printed circuit board. At least a part of the fixing part is fixed to the bent part of the flexible printed circuit board.

A display apparatus includes a display panel that displays an image, a first flexible printed circuit film disposed on a rear surface of the display panel, and a cover window disposed on the display panel. The first flexible printed circuit film includes a first horizontal portion electrically connected to the display panel and extending in a first direction, a first vertical portion electrically connected to the first horizontal portion and extending in a second direction intersecting the first direction, and a protruding portion that protrudes from a side surface of the first vertical portion.

A flexible circuit board and an electronic device including a flexible circuit board are provided. The flexible circuit board may include a substrate having a bending area and a non-bending area, a wiring pattern layer provided on the bending area and the non-bending area, a plating layer provided on the wiring pattern layer and including an open area in an area corresponding to the bending area, and a protective layer that directly contacts one surface of the wiring pattern layer exposed at the open area and a side surface of the plating layer. The protective layer may have a larger thickness than a thickness of the plating layer.

A display apparatus is provided. The display apparatus includes a display panel having a display portion, a connecting portion, and a bending portion; a polarizer on a first side of the display portion; a cover window on the first side of the display portion, and on a side of the polarizer away from the display portion; a coating layer having a main portion, and a tapered portion extending from the main portion toward the polarizer; and an optically clear adhesive layer on the first side of the display portion, and between the polarizer and the cover window. The optically clear adhesive layer has a first adhering surface at least partially attaching to the cover window, a second adhering surface at least partially attaching to the polarizer, and an edge connecting the first adhering surface and the second adhering surface and adjacent to the tapered portion.

A busbar module includes: a circuit body having a flexible circuit board; busbars; and a holder. The circuit body has: conductor layers and protective layers to form a multiple-layered structure of wiring patterns; a band-shaped main strip to be located to extend in a stacking direction of cells; and a band-shaped branch strip branched from the main strip. The branch strip has: a bent portion extending in the stacking direction and having a bent shape around an axis crossing the stacking direction; and a connection portion disposed closer to an end of the branch strip than the bent portion and connected to the corresponding busbar. The bent portion has a thin-layer portion having a shape formed by removing, from the flexible circuit board, a part of the protective layers corresponding to a part of the conductor layers without being used as the wiring pattern in the branch strip.

A flexible circuit board and an electronic device including a flexible circuit board are provided. The flexible circuit board may include a substrate having a bending area and a non-bending area, a wiring pattern layer provided on the bending area and the non-bending area, a plating layer provided on the wiring pattern layer and including an open area in an area corresponding to the bending area, and a protective layer that directly contacts one surface of the wiring pattern layer exposed at the open area and a side surface of the plating layer. The protective layer may have a larger thickness than a thickness of the plating layer.