Abstract: A surface light source device includes a light source; a light guide plate that has a light entrance surface through which light enters, and that emits the light entering through the light entrance surface from a light exit surface; a wiring board; and a metal frame. The metal frame includes a bottom portion having a bottom surface that faces a surface on an opposite side to the light exit surface, a side wall erected on an outer periphery of the bottom surface, and a projecting portion provided on the side wall so as to project toward the bottom surface side. The metal frame houses the light source, the light guide plate, and the wiring board. At least a part of the light source is disposed between the bottom portion and the projecting portion, and the wiring board is disposed between the light source and the bottom portion.

Abstract: A frame includes a resin frame which surrounds at least a part of the side faces of a light guide plate; a reflection diffusion material which is added in the resin frame and reflects and diffuses light; and an absorption material which is added in the resin frame and absorbs light. The reflectance of the resin frame is equal to or greater than 30% and equal to or smaller than 80%.

Abstract: A surface light source device includes a light source; a light guide plate that has a light entrance surface through which light enters, and that emits the light entering through the light entrance surface from a light exit surface; a wiring board; and a metal frame. The metal frame includes a bottom portion having a bottom surface that faces a surface on an opposite side to the light exit surface, a side wall erected on an outer periphery of the bottom surface, and a projecting portion provided on the side wall so as to project toward the bottom surface side. The metal frame houses the light source, the light guide plate, and the wiring board. At least a part of the light source is disposed between the bottom portion and the projecting portion, and the wiring board is disposed between the light source and the bottom portion.

Abstract: A frame includes a resin frame which surrounds at least a part of the side faces of a light guide plate; a reflection diffusion material which is added in the resin frame and reflects and diffuses light; and an absorption material which is added in the resin frame and absorbs light. The reflectance of the resin frame is equal to or greater than 30% and equal to or smaller than 80%.

Abstract: An embodiment of the present invention reduces difference in brightness between a portion where a tab of an optical sheet is formed and a portion where the tab is not formed. A frame (3) of a planar light source device (1) has an inclined surface (13) formed so as to incline with respect to a direction perpendicular to a light exit plane and to face in a direction opposite to the light exit plane. The inclined surface (13) is formed at least at a portion where a cut part (17) is not formed, which portion is part of a surface (12) of the frame (3) which surface (12) faces a lateral surface (11) of a light guide plate (2). At a bottom surface (14) of the frame (3), a light absorbing member (6) is provided.

Abstract: A backlight device includes LEDs, a light guide plate, an LED board, and a light blocking portion. The light guide plate includes a side surface configured as a light entrance surface through which light from the LEDs enters and a plate surface configured as a light exit surface through which light exits the light guide plate. The LED board on which the LEDs are mounted and at least a portion of which is a light guide plate overlapping portion is on a light exit surface side. The light guide plate overlapping portion overlaps a light entering edge portion that is an edge portion of the light guide plate close to the light entrance surface. The light blocking portion is at the light guide plate overlapping portion of the LED board and between the light guide plate overlapping portion and the light entering edge portion of the light guide plate.

Abstract: A backlight device includes LEDs, a light guide plate, and a frame. The light guide plated includes peripheral surfaces including an LED opposing surface and an LED non-opposing surface and includes plate surfaces including a light exit surface and an opposite plate surface on the opposite side from the light exit surface. The frame includes a high light reflective portion and a high light blocking portion. The high light reflective portion is opposed to the LED non-opposing surface. The high light blocking portion is arranged such that an end of the high light reflective portion in a direction parallel to a direction from the light exit surface to the opposite plate surface along a direction normal to the plate surfaces of the light guide plate. The high light blocking portion has a lower light reflectivity and a higher light blocking property than the high light reflective portion.

Abstract: A backlight device includes LEDs, a light guide plate, an LED board, and a light blocking portion. The light guide plate includes a side surface configured as a light entrance surface through which light from the LEDs enters and a plate surface configured as a light exit surface through which light exits the light guide plate. The LED board on which the LEDs are mounted and at least a portion of which is a light guide plate overlapping portion is on a light exit surface side. The light guide plate overlapping portion overlaps a light entering edge portion that is an edge portion of the light guide plate close to the light entrance surface. The light blocking portion is at the light guide plate overlapping portion of the LED board and between the light guide plate overlapping portion and the light entering edge portion of the light guide plate.

Abstract: Provided is a backlight device which can suppress deterioration of uniformity. The backlight device (10) is provided with an LED (11), and a light guide plate (12) which includes a light incoming surface (12a) and a light outgoing surface (12b). An inclined surface (12c) which is inclined from the light outgoing surface is formed between the light incoming surface and the light outgoing surface of the light guide plate, and the light guide plate is formed such that the thickness of a portion on the light incoming surface side is more than that of a portion on the light outgoing surface side. At the front of the portion on the light incoming surface side of the light outgoing surface of the light guide plate, a regulating member (13), which has a light blocking characteristic and regulates shift of the light guide plate in the thickness direction of the light guide plate, is arranged.

Abstract: Provided is a backlight device which can suppress deterioration of uniformity. The backlight device (10) is provided with an LED (11), and a light guide plate (12) which includes a light incoming surface (12a) and a light outgoing surface (12b). An inclined surface (12c) which is inclined from the light outgoing surface is formed between the light incoming surface and the light outgoing surface of the light guide plate, and the light guide plate is formed such that the thickness of a portion on the light incoming surface side is more than that of a portion on the light outgoing surface side. At the front of the portion on the light incoming surface side of the light outgoing surface of the light guide plate, a regulating member (13), which has a light blocking characteristic and regulates shift of the light guide plate in the thickness direction of the light guide plate, is arranged.

Abstract: Display qualities of a liquid crystal panel are prevented from being deteriorated by lugs formed on a light conductor plate. A liquid crystal display device (1) is configured by attaching constituting elements, such as a liquid crystal panel (10), a reflecting plate (12), a light conductor plate (13), a diffusion sheet (14), a first lens sheet (15) and a second lens sheet (16), on a chassis (11). On one side of the light conductor plate (13), a light incoming section (22) for receiving light from a light source LED (19) is formed. At the periphery of the light conductor plate (13), lugs (23a, 23b) to be engaged with the chassis (11) are formed, and recessed sections (24a, 24b) to be engaged with the lugs (23a, 23b) are formed on the chassis (11). The lug (23a) close to the light incoming section (22) is at a position where incoming light is not directly applied.

Abstract: A liquid crystal display device includes a liquid crystal display plate (11) having corner portions thereof, a illuminating device (12) for illuminating the liquid crystal display plate (11) from a rear side of the liquid crystal display plate (11), the illuminating device (12) including a light guiding plate (21) disposed on a rear side of parallel to the liquid crystal display plate (11) and a source (22) disposed at an end portion of the light guiding plate (21), a supporting frame (13) for supporting the illuminating device (12), the supporting frame (13) having corner portions thereof, holding members (31a, 31b, 31c, disposed on the corner portions of the supporting frame (13) for holding the corner portions of the liquid crystal display plate (11) in an electrically insulating state, and an engaging unit (32) for engaging the holding members (31a, 31b, 31c, 31d) with the supporting frame (13).