Backlight module
A backlight module includes a circuit board, a light guide layer, a light-emitting module, a light-shielding layer, a cover plate, a first light-filtering layer, and a second light-filtering layer. The light guide layer is disposed over the circuit board and includes a microstructure group. The light-emitting module is disposed on the circuit board and is configured to emit a first wavelength light and a second wavelength light. The light-shielding layer is disposed over the light-emitting module and has a first hollowed portion. The first light-filtering layer is disposed between the light-shielding layer and the cover plate and has a second hollowed portion. The second light-filtering layer is disposed between the light-shielding layer and the cover plate and has a third hollowed portion.
1 . A backlight module, comprising:
a circuit board;
a light guide layer disposed over the circuit board and comprising a microstructure group;
a light-emitting module disposed on the circuit board and configured to emit a first wavelength light and a second wavelength light;
a light-shielding layer disposed over the light-emitting module and having a first hollowed portion disposed corresponding to the microstructure group;
a cover plate disposed over the light-shielding layer;
a first light-filtering layer disposed between the light-shielding layer and the cover plate and having a second hollowed portion corresponding to the microstructure group; and
a second light-filtering layer disposed between the light-shielding layer and the cover plate and having a third hollowed portion corresponding to the microstructure group,
wherein the first wavelength light is guided by the microstructure group and passes upward through the first hollowed portion, the third hollowed portion, and the first light-filtering layer to emit from the cover plate, or the second wavelength light is guided by the microstructure group and passes upward through the first hollowed portion, the second light-filtering layer, and the second hollowed portion to emit from the cover plate.
2 . The backlight module of claim 1 , wherein the first light-filtering layer is configured to block the second wavelength light from passing through, and the second light-filtering layer is configured to block the first wavelength light from passing through.
3 . The backlight module of claim 1 , wherein the second hollowed portion presents a first pattern, and the third hollowed portion presents a second pattern, and wherein the first hollowed portion presents one of:
the first pattern;
the second pattern; and
a third pattern composed of at least a union of the first pattern and the second pattern.
4 . The backlight module of claim 1 , wherein the light guide layer has a through hole configured to accommodate the light-emitting module.
5 . The backlight module of claim 1 , further comprising a light reflective layer disposed between the circuit board and the light guide layer.
6 . The backlight module of claim 5 , wherein the microstructure group is located at a side of the light guide layer close to the light reflective layer.
7 . The backlight module of claim 1 , wherein the light-emitting module comprises a first light-emitting element and a second light-emitting element, the first light-emitting element emits the first wavelength light, and the second light-emitting element emits the second wavelength light.
8 . The backlight module of claim 1 , wherein the first light-filtering layer and the second light-filtering layer are a light-filtering film or a light-filtering coating coated on the cover plate.
9 . The backlight module of claim 1 , wherein a wavelength of the first wavelength light and a wavelength of the second wavelength light are completely staggered.
10 . The backlight module of claim 1 , wherein a wavelength of the first wavelength light is within a range between 580 nanometers and 780 nanometers, and a wavelength of the second wavelength light is within a range between 435 nanometers and 579 nanometers.
11 . A backlight module, comprising:
a circuit board;
a light guide layer disposed over the circuit board and comprising a microstructure group;
a light-emitting module disposed on the circuit board and configured to emit a first wavelength light and a second wavelength light;
a light-shielding layer disposed over the light-emitting module and having a first hollowed portion disposed over the microstructure group;
a cover plate disposed over the light-shielding layer;
a first light-filtering layer disposed between the light-shielding layer and the cover plate and having a second hollowed portion over the microstructure group; and
a second light-filtering layer disposed between the light-shielding layer and the cover plate and having a third hollowed portion over the microstructure group,
wherein the first wavelength light is guided by the microstructure group and passes through the first hollowed portion, the third hollowed portion, and the first light-filtering layer to emit from the cover plate, or the second wavelength light is guided by the microstructure group and passes through the first hollowed portion, the second light-filtering layer, and the second hollowed portion to emit from the cover plate.
12 . The backlight module of claim 11 , wherein the first light-filtering layer is configured to block the second wavelength light from passing through, and the second light-filtering layer is configured to block the first wavelength light from passing through.
13 . The backlight module of claim 11 , wherein the second hollowed portion presents a first pattern, and the third hollowed portion presents a second pattern, and wherein the first hollowed portion presents one of:
the first pattern;
the second pattern; and
a third pattern composed of at least a union of the first pattern and the second pattern.
14 . The backlight module of claim 11 , wherein the light guide layer has a through hole configured to accommodate the light-emitting module.
15 . The backlight module of claim 11 , further comprising a light reflective layer disposed between the circuit board and the light guide layer.
16 . The backlight module of claim 15 , wherein the microstructure group is located at a side of the light guide layer close to the light reflective layer.
17 . The backlight module of claim 11 , wherein the light-emitting module comprises a first light-emitting element and a second light-emitting element, the first light-emitting element emits the first wavelength light, and the second light-emitting element emits the second wavelength light.
18 . The backlight module of claim 11 , wherein the first light-filtering layer and the second light-filtering layer are a light-filtering film or a light-filtering coating coated on the cover plate.
19 . The backlight module of claim 11 , wherein a wavelength of the first wavelength light and a wavelength of the second wavelength light are completely staggered.
20 . The backlight module of claim 11 , wherein a wavelength of the first wavelength light is within a range between 580 nanometers and 780 nanometers, and a wavelength of the second wavelength light is within a range between 435 nanometers and 579 nanometers.