Backlight module

Abstract

The invention discloses a backlight module, which comprises a light emitting device, a light guide plate, a first prism component and a second prism component, wherein a light emergent top surface of the light guide plate is provided with a plurality of parallel adjacent light guide prisms; the light guide prisms extend in light emergent direction of the light emitting device; the first prism component comprises a first substrate and a plurality of parallel adjacent first prisms which are arranged on a light emergent surface of the first substrate; the first prisms extend in light emergent direction of the light emitting device; the second prism component comprises a second substrate and a plurality of parallel adjacent second prisms; the second prisms are arranged on a light emergent surface of the second substrate; and the extension direction of the second prisms is perpendicular to the extension direction of the first prisms. By arranging the first prisms with the same extension direction (or called parallel extension directions) above the light guide plate with the light guide prisms, light with large angle in the light guide plate is not led out on the light incidence side, so that a light mixing space is expanded, a shot spot phenomenon with clear brightness and darkness on the light incidence side is avoided, and the display effect of the backlight module is improved.

Description

technical field [0001] The invention relates to a flat panel display, in particular to a backlight module used for a flat panel display. Background technique [0002] With the continuous improvement of LED efficiency, the design of LED TV backlights has also evolved. From the initial four-sided light input, to double-side light input, to single-side light input, short-side light input has gradually become a trend. In addition, the frame of LED TV is becoming narrower and narrower in pursuit of aesthetics. With the development of light guide plate technology, more and more designs will be equipped with light guide plates containing microstructures. figure 1 A schematic diagram of the structure of the light guide plate is shown, as figure 1 As shown, the light-emitting top surface 110 of the light guide plate 100 has a plurality of parallel adjacent light guide prisms 120, and the light guide prisms 120 extend along a certain direction on the light guide plate, for example ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problem that the extension direction of the light guide prism of the light guide plate is perpendicular to the extension direction of the prism above the light guide plate in the prior art, which causes the large-angle light beam of the light guide plate to be led out by the prism and cause light spots to appear. Provide a backlight module

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