Liquid crystal display module and an assembly method therefor

A display module of a liquid crystal display (LCD) device, comprising:

• a rear case shaped as a four-cornered container having sidewalls on each of its four edges;
• a backlight assembly comprising a reflector plate, a light guide plate, and a series of sheets, and a mold frame onto which the reflector plate, the light guide plate and the series of sheets are fixed, the mold frame comprising a lamp assembly receiving portion, an inverter supporting bar for supporting an inverter, a gate printed circuit board (PCB) receiving portion and a source printed circuit board (PCB) receiving portion integrally formed at its right, left, upper, and lower edges;
• an LCD panel module having an upper panel, a lower panel coupled to the upper panel with a liquid crystal layer inserted therebetween, a gate PCB electrically connected to an end portion of the lower panel, and a source PCB electrically connected to another end portion of the lower panel adjacent to the end portion of the lower panel, wherein the source PCB and the gate PCB are connected to each other in a board-to-board manner;
• a main chassis that defines an active screen area of said LCD panel module and couples the mold frame and said LCD panel module to said rear case;
• and
• a front case coupled to the main chassis and covering a whole surface of the LCD panel module excluding the active screen area.

A display module of a liquid crystal display (LCD) device, comprising:

• a rear case shaped as a four-cornered container having sidewalls on each of its four edges;
• a backlight assembly comprising a reflector plate, a light guide plate, and a series of sheets, and a mold frame onto which the reflector plate, a light guide plate and the series of sheets are fixed, the mold frame having a lamp assembly receiving portion, an inverter supporting bar, a gate printed circuit board (PCB) receiving portion and a source printed circuit board (PCB) receiving portion at its right, left, upper, and lower edges;
• an LCD panel module having an upper panel, a lower panel coupled to the upper panel with a liquid crystal layer inserted therebetween, a gate PCB electrically connected to an end portion of the lower panel, and a source PCB electrically connected to another end portion of the lower panel adjacent to the end portion of the lower panel and having a conductive pattern for an electric signal to an inverter, wherein the source PCB and the gate PCB are connected to each other in a board-to-board manner;
• a main chassis that defines an active screen area of the LCD panel module and couples the mold frame and the LCD panel module to the rear case;
• and
• a front case coupled to said main chassis and covering a whole surface of said LCD panel module excluding said active screen area.

A method for assembling a display module, comprising the steps of:

• mounting a liquid crystal display (LCD) panel to a backlight assembly formed through an additional step by depositing a reflector plate, a light guide plate, and a series of sheets onto a mold frame, and fixing a source printed circuit board (PCB) of the LCD panel onto a rear surface of the mold frame by bending the source PCB, wherein the source PCB and a gate printed circuit board (PCB) of the LCD panel are connected by a board-to-board manner;
• mounting the backlight assembly to a rear case;
• mounting an inverter to an inverter supporting bar formed integrally with the mold frame;
• coupling a main chassis to the rear case so as to fix the backlight assembly and define an active screen area;
• and
• coupling a front case to the main chassis so as to cover a whole surface excluding the active screen area of the LCD panel,
• wherein the source PCB and a gate printed circuit board (PCB) of the LCD panel are directly and electrically connected by a board-to-board method when the source PCB of the LCD panel is fixed to the rear surface of the mold frame.