Light guide plate
A technology of light guide plate and point light source, applied in the field of light guide plate, can solve the problem of uneven brightness on the surface of surface light source, and achieve the effect of eliminating obvious bright blocks and uniform light intensity
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Embodiment 1
[0036] figure 1 It is an exploded view of the light guide plate and its surrounding structures in Embodiment 1 of the present invention. Such as figure 1 As shown, the light guide plate 1 cooperates with a plurality of point light sources 2 to form a direct-type backlight module 3, and the point light sources 2 can be realized by, for example, light emitting diodes.
[0037] The light guide plate 1 includes a light incident surface 10 and a light exit surface 12 opposite to the light incident surface 10 ; The light guide plate 1 is usually made of polymethylmethacrylate (Polymethylmethacrylate, PMMA) or polystyrene (Polystyrene, PS) with a uniform thickness and transparent rectangular structure, but the material of the light guide plate 1 is not Excluding the use of other resin materials with light-transmitting properties, such as: acrylic resin (Acrylic Resin), cycloolefin polymer (COC), polycarbonate (PC) or silicone (Silicone).
[0038] A plurality of point light sources...
Embodiment 2
[0044] Figure 4 It is a cross-sectional view of the light guide plate and its surrounding structures according to Embodiment 2 of the present invention. Such as Figure 4 As shown, the light guide plate 1a is similar to the light guide plate 1 of the embodiment 1, and the same components are marked with the same symbols. It is worth noting that the difference between the two is Figure 4 The groove 18a of the light guide plate 1a shown is branched in a Y shape. The groove 18a has a tip, so that the curvature distribution of the groove 18a is discontinuous. In actual implementation, the groove 18a may also connect two sub-grooves, so that the groove 18a continuously branches in a dendritic shape, and in actual design, the depth of the branched groove may be smaller than the depth of the branched groove. The functions and relevant descriptions of the components of the light guide plate 1a are actually the same as those of the light guide plate 1 in the first embodiment, and w...
Embodiment 3
[0046] Figure 5 It is a cross-sectional view of the light guide plate and its surrounding structures according to Embodiment 3 of the present invention. Such as Figure 5 As shown, the light guide plate 1b is similar to the light guide plate 1 of the embodiment 1, and the same components are marked with the same symbols. It is worth noting that the difference between the two is Figure 5 The front side of the shown light guide plate 1 b is designed with an optical microstructure pattern (Pattern) 19 that helps to emit light.
[0047] The optical microstructure pattern 19 is designed to uniformize the uniformity of the light emitted from the light emitting surface 12 on the front of the light guide plate 1b. In order to improve the convenience of processing the light guide plate 1b, and to avoid the existence of the groove 18 and the optical microstructure pattern 19 from interfering with each other in the design freedom, the groove 18 and the optical microstructure pattern...
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