Backlight device and liquid crystal display

A liquid crystal display comprising a liquid-crystal panel and a back-light device for shedding light on the back of the liquid-crystal panel, the back-light device comprising:

• a light-guiding plate being in the shape of a rectangular plate, part of one of its side surfaces, each facing in a direction perpendicular to the directions of its thickness, being formed as an incident surface to allow light to enter, and one of its top and bottom surfaces in the directions of its thickness being a light-radiating surface;
• a flexible PCB being attached to part of the light-guiding plate in the vicinity of the incident surface;
• light sources being installed on the flexible PCB, each of them having a light-radiating surface, which is put in close contact with the incident surface of the light-guiding plate;
• and
• a frame housing and holding the light-guiding plate and the flexible PCB,
• wherein the frame has a supporting wall on which the light-guiding plate is put, a window provided in the supporting wall and through which the light-radiating surface of the light-guiding plate is seen, and erected walls which are erected at the periphery of the supporting wall;
• wherein the flexible PCB has a PCB part on which the light sources are installed and erected parts which are erected on the far side of the PCB part away from the incident surface of the light-guiding plate;
• and
• wherein the light-guiding plate is positioned with respect to the frame in the direction defined between the incident surface and the side surface facing in a direction perpendicular to the directions of the thickness of the light-guiding plate and being opposite to the incident surface by its side surface opposite to its incident surface being in contact with an erected wall of the frame and the erected parts of the flexible PCB being in contact with another erected wall of the frame.