Frontlight module and display apparatus

A display apparatus, comprising:

• a display panel;
• and
• a frontlight module, wherein
• the display panel is connected to the frontlight module using an optical adhesive,
• the frontlight module is disposed on a side of the display panel, and
• the frontlight module comprises:
• a light source;
• a light guide plate;
• and
• a plurality of light guide dots, wherein
• the light guide plate includes a first surface and a second surface disposed opposite to each other,
• the display panel is disposed facing the second surface,
• the light source is disposed on a side surface of the light guide plate,
• the plurality of light guide dots are disposed on the second surface of the light guide plate,
• each light guide dot, from the plurality of light guide dots, has a trapezoidal structure,
• each light guide dot, from the plurality of light guide dots, has a light guide surface disposed at an angle with respect to a surface of the light guide plate,
• a top surface of the trapezoidal structure is connected to the second surface,
• a waist on a side of the trapezoidal structure away from the light source forms the light guide surface,
• the angle between the light guide surface and the surface of the light guide plate is Θ,
• an incident angle of light on the side surface of the light guide plate is β, and β and θ satisfy:
• β+θ≥90°+arcsin(n1/n)
• wherein n is a refractive index of the light guide plate,
• n1 is a refractive index of an outer side medium of the light guide plate,
• light is fully reflected and/or refracted on the light guide surfaces and propagates to the display panel,
• a width of a bottom surface, of each of the plurality of light guide dots, connected to the light guide plate is the same,
• vertex angles of the trapezoidal structure of each light guide dot are the same,
• heights of the plurality of light guide dots gradually increase from a side close to the light source to a side away from the light source,
• a width of the top surface of the trapezoidal structure is D,
• a height of the trapezoidal structure is H, and
• D and H satisfy:
• D/H≤1/tan β−tan(θ−90°)
• wherein θ is the angle between the light guide surface and the surface of the light guide plate, and
• β is an incident angle of light on the side surface of the light guide plate.

A frontlight module configured for disposing on a side of a display panel, the frontlight module comprising:

• a light source;
• a light guide plate;
• and
• a plurality of light guide dots, wherein
• the light guide plate includes a first surface and a second surface disposed opposite to each other,
• the display panel is disposed facing the second surface,
• the light source is disposed on a side surface of the light guide plate,
• the plurality of light guide dots are disposed on the second surface of the light guide plate,
• each light guide dot, from the plurality of light guide dots, has a columnar structure,
• each light guide dot, from the plurality of light guide dots, has a light guide surface disposed at an angle with respect to a surface of the light guide plate,
• a side surface of the columnar structure away from the light source forms the light guide surface,
• first light is reflected on the light guide surface and propagates to the display panel,
• second light is refracted on the light guide surface and propagates to the display panel,
• light guide dots, from the plurality of light guide dots, in two adjacent rows are arranged in a staggered manner,
• a center distance P between every two adjacent light guide dots is within a range of 20 μm to 500 μm, and
• a ratio H/D of a height H to a width D of each light guide dot is within a range of 0.1 to 10.