Unit pixel and displaying apparatus including the unit pixel
A unit pixel and a displaying apparatus including the unit pixel are provided. The unit pixel includes a transparent substrate, and a plurality of light emitting devices arranged on the transparent substrate. The transparent substrate includes at least one light scattering line disposed therein so as to correspond to each of the plurality of light emitting devices.
1 . A unit pixel comprising:
a transparent substrate formed of a single layer of transmissive material and including a light incident surface and a light exiting surface; and
a plurality of light emitting devices arranged on the transparent substrate and operable to emit light of different colors from one another;
wherein the light generated from the plurality of light emitting devices enters via the light incident surface of the transparent substrate and exits the transparent substrate through the light exiting surface;
at least one light scattering line located within the transparent substrate, spaced from the light incident and light exiting surfaces, and corresponding to one or more of the plurality of light emitting devices in a predetermined pattern, wherein each of the at least one light scattering line comprises a continuous elongate void within the transparent substrate having a length that is at least as long as a lateral dimension of each of the corresponding one or more of the plurality of light emitting devices; and
a light blocking layer disposed between the transparent substrate and the plurality of light emitting devices arranged on a coplanar surface, wherein: the light blocking layer has at least one window configured to pass the light generated from the plurality of the light emitting devices, and the at least one light scattering line is disposed so as to correspond to the at least one window.
2 . The unit pixel of claim 1 , wherein the length of the continuous void is at least as long as a length of each of the corresponding one or more of the plurality of light emitting devices.
3 . The unit pixel of claim 1 , wherein the at least one light scattering line extends from one side of the transparent substrate to the other side opposite thereto.
4 . The unit pixel of claim 3 , wherein the at least one light scattering line further includes a plurality of light scattering lines positioned to be orthogonal to one another.
5 . The unit pixel of claim 4 , wherein: the plurality of light scattering lines is disposed to surround the light emitting devices.
6 . The unit pixel of claim 4 , further comprising:
a plurality of windows corresponding to and exposing one or more of the plurality of light emitting devices, and the plurality of light scattering lines overlaps with the one or more of the plurality of light emitting devices by extending over and across one or more windows among the plurality of windows.
7 . The unit pixel of claim 6 , wherein the plurality of light scattering lines includes a first line crossing over entire light emitting devices and a plurality of second lines crossing over each of the light emitting devices.
8 . The unit pixel of claim 1 , wherein the continuous elongate void of each of the at least one light scattering line is completely enclosed within the transparent substrate.
9 . The unit pixel of claim 1 , wherein:
the light blocking layer includes a plurality of windows respectively corresponding to the plurality of light emitting devices, and the at least one light scattering line includes a plurality of light scattering lines disposed across, or around the plurality of windows.
10 . The unit pixel of claim 1 , wherein the at least one light scattering line crosses over the at least one window.
11 . The unit pixel of claim 1 , wherein the at least one light scattering line has an average height of 10 μm or less.
12 . A unit pixel comprising:
a plurality of sub-pixels comprising a first sub-pixel and a second sub-pixel, the first sub-pixel comprising:
a first transparent substrate formed of a single layer of transmissive material and including a first light incident surface and a first light exiting surface; and
a first light emitting device disposed adjacent to the first transparent substrate and operable to emit light of a selected color, the second sub-pixel comprising:
a second transparent substrate formed of a single layer of transmissive material and including a second light incident surface and a second light exiting surface; and
a second light emitting device disposed adjacent to the second transparent substrate and operable to emit light of a different color from the first light emitting device; and
at least one light scattering line located within the first transparent substrate, within the second transparent substrate, or both, and positioned to be around or across the first light emitting device, the second light emitting device, or both in at least one predetermined pattern, wherein each of the at least one light scattering line comprises a continuous elongate void completely enclosed within the first transparent substrate located between and spaced from the first light incident and first light exiting surfaces or completely enclosed within the second transparent substrate located between and spaced from the second light incident and second light exiting surfaces and having a length that is at least as long as a lateral dimension of each of the corresponding one or more of the plurality of light emitting devices.
13 . The unit pixel of claim 12 , wherein:
the first transparent substrate and the second transparent substrate form a common transparent substrate;
the common transparent substrate further includes a second light scattering line including a plurality of voids spaced apart from one another arranged in the common transparent substrate; and
the second light scattering line extends from one side of the common transparent substrate to the other side opposite thereto.
14 . The unit pixel of claim 12 , wherein:
the first transparent substrate is arranged on the first light emitting device and the second transparent substrate is arranged on the second light emitting device;
the at least one light scattering line includes a first light scattering line arranged in the first transparent substrate and a second light scattering line arranged in the second transparent substrate; and
the first transparent substrate, the second transparent substrate, or both include a growing substrate for growing the first light emitting device, the second light emitting device, or both.
15 . A displaying apparatus comprising:
a circuit board; and
a plurality of unit pixels disposed on the circuit board;
each of the plurality of unit pixels comprising:
a plurality of light emitting devices operable to emit light of different colors from one another;
a transparent substrate comprising a single transmissive material covering all of the plurality of light emitting devices and including a light incident surface and a light exiting surface, wherein the light generated from the plurality of light emitting devices enters via the light incident surface of the transparent substrate and exits the transparent substrate through the light exiting surface; and
at least one light scattering line located within the single transmissive material of the transparent substrate, spaced from the light incident and light exiting surfaces, and corresponding to one or more of the plurality of light emitting devices in a predetermined pattern, wherein each of the at least one light scattering line comprises a continuous elongate void within the single transmissive material of the transparent substrate having a length that is at least as long as a lateral dimension of each of the corresponding one or more of the plurality of light emitting devices, wherein:
the plurality of light emitting devices are spaced apart and arranged adjacent to the transparent substrate, and each unit pixel further comprises a light blocking layer disposed between the transparent substrate and a respective light emitting device, the light blocking layer has at least one window configured to pass the light generated from the plurality of light emitting devices towards the light incident surface of the transparent substrate, and the at least one light scattering line is disposed so as to correspond to the at least one window.
16 . The displaying apparatus of claim 15 , wherein the at least one light scattering line further includes a continuous void or voids spaced apart from one another.
17 . The displaying apparatus of claim 15 , wherein the at least one light scattering line extends from one side of the transparent substrate to an opposite side of the transparent substrate.
18 . The displaying apparatus of claim 15 , wherein:
the continuous elongate void of each of the at least one light scattering line is completely enclosed within the transparent substrate.
19 . The displaying apparatus of claim 15 , wherein:
wherein the length of the continuous void is at least as long as a length of each of the corresponding one or more of the plurality of light emitting devices.
20 . The displaying apparatus of claim 15 , the circuit board further includes a plurality of pads; and
each of the unit pixels is bonded to the plurality of pads through a bonding material.