Light source device and display apparatus

1. A light source device, comprising:

a light source;

a light-transmissive plate having a side surface or a main surface facing the light source;

a holding frame having a frame-shaped surface holding a peripheral edge portion of the light-transmissive plate, the holding frame having a frame shape; and

a spacer provided between the peripheral edge portion of the light-transmissive plate and the frame-shaped surface of the holding frame,

wherein the holding frame includes:

a first rib provided on the frame-shaped surface, at a position closer to an outer edge of the holding frame than a contact position of the frame-shaped surface in contact with the spacer, the first rib extending along the frame shape;

a second rib provided on an opposite surface opposite to the frame-shaped surface, the second rib being along the frame shape;

a first recessed portion provided between the first rib and the contact position; and

a second recessed portion provided at a position closer to the outer edge of the holding frame than the second rib.

2. The light source device according to claim 1 , wherein:

the first rib is provided on the frame-shaped surface all along a circumferential direction thereof; and

the first recessed portion comprises a plurality of linear grooves along the first rib.

3. A display apparatus, comprising:

a light source;

a light-transmissive plate having a side surface or a main surface facing the light source;

a holding frame having a first frame-shaped surface holding a peripheral edge portion of the light-transmissive plate, the holding frame having a frame shape;

a first spacer provided between the peripheral edge portion of the light-transmissive plate and the first frame-shaped surface of the holding frame;

a liquid crystal panel having a peripheral edge portion held by a second frame-shaped surface of the holding frame opposite to the first frame-shaped surface, the liquid crystal panel facing the light-transmissive plate; and

a second spacer provided between the peripheral edge portion of the liquid crystal panel and the second frame-shaped surface of the holding frame,

wherein:

light output from the light-transmissive plate is directed toward the liquid crystal panel; and

the holding frame comprises:

a first rib provided on the first frame-shaped surface, at a position closer to an outer edge of the holding frame than a first contact position of the first frame-shaped surface in contact with the first spacer, the first rib extending along the frame shape; and

a first recessed portion provided between the first rib and the first contact position.

4. The display apparatus according to claim 3 , wherein the holding frame further comprises:

a second rib provided on the second frame-shaped surface, at a position closer to an inner edge of the holding frame than a second contact position of the second frame-shaped surface in contact with the second spacer, the second rib extending along the frame shape; and

a second recessed portion provided between the second rib and the second contact position.