Light path control member, display device including same, and method for manufacturing light path control member
A light path control member according to one embodiment includes a first substrate; a first electrode disposed on the first substrate; a light conversion unit disposed on the first electrode; a second electrode disposed on the light conversion unit; and a second substrate disposed on the second electrode. The light conversion unit includes a light transmitting part, a high reflective part around the light transmitting part, and a transmittance variable part between the light transmitting part and the high reflective part. The light transmittance of the transmittance variable part is changed based on the voltage applied.
1 . A light path control member, comprising:
a first substrate;
a first electrode disposed on the first substrate;
a light conversion unit disposed on the first electrode, the light conversion unit including:
a plurality of light transmitting parts spaced apart from each other,
a high refractive part disposed between adjacent ones of the plurality of light transmitting parts, and
a transmittance variable part between the light transmitting part and the high refractive part;
a second electrode disposed on the light conversion unit; and
a second substrate disposed on the second electrode,
wherein light transmittance of the transmittance variable part is changed based on voltage.
2 . The light path control member of claim 1 , wherein the light conversion unit is disposed between the first electrode and the second electrode.
3 . The light path control member of claim 1 , wherein a refractive index of the high refractive part is greater than a refractive index of the light transmitting part.
4 . The light path control member of claim 1 , wherein the transmittance variable part includes a dispersion solution and light absorbing particles in the dispersion solution.
5 . The light path control member of claim 4 , wherein in a first mode, the light absorbing particles are dispersed in the dispersion solution,
wherein in the first mode, the transmittance variable part blocks light incident by dispersion of the light absorbing particles.
6 . The light path control member of claim 5 , wherein in the first mode, no voltage is applied to each of the first electrode and the second electrode.
7 . The light path control member of claim 6 , wherein in a second mode, an alignment direction of the light absorbing particles are changed.
8 . The light path control member of claim 7 , wherein in the second mode, the voltage of a first polarity is applied to the first electrode, and the voltage of a second polarity different from the first polarity is applied to the second electrode.
9 . The light path control member of claim 8 , wherein the alignment direction of the light absorbing particles of the transmittance variable part is changed according to a magnetic field formed by the first electrode and the second electrode.
10 . The light path control member of claim 9 , wherein the transmittance variable part is variable in transmittance according to the alignment direction of the light absorbing particles.
11 . The light path control member of claim 8 , wherein a refractive index of the dispersion solution is smaller than a refractive index of the high refractive part and greater than a refractive index of the light transmitting part.
12 . The light path control member of claim 1 , wherein an opening extending from an upper surface in a thickness direction is formed in the light transmission part, and the transmittance variable part is disposed within the opening.
13 . The light path control member of claim 1 , wherein the transmittance variable part is disposed between the light transmitting part and the high refractive part.
14 . The light path control member of claim 1 , wherein the second electrode contacts an upper surface of the transmittance variable part, and an upper surface of the light transmitting part, and an upper surface of the high refractive part, respectively.
15 . A display device, comprising:
a display panel; and
a light path control member on the display panel,
wherein the light path control member comprises:
a first substrate;
a first electrode disposed on the first substrate;
a light conversion unit disposed on the first electrode, the light conversion unit including:
a plurality of light transmitting parts spaced apart from each other,
a high refractive part disposed between adjacent ones of the plurality of light transmitting parts, and
a transmittance variable part between the light transmitting part and the high refractive part;
a second electrode disposed on the light conversion unit; and
a second substrate disposed on the second electrode,
wherein light transmittance of the transmittance variable part is changed based on voltage.
16 . The display device of claim 15 , wherein the light conversion unit is disposed between the first electrode and the second electrode.
17 . The display device of claim 15 , wherein a refractive index of the high refractive part is greater than a refractive index of the light transmitting part.
18 . The display device of claim 15 , wherein the transmittance variable part is disposed between the light transmitting part and the high refractive part.
19 . The display device of claim 15 , wherein the second electrode contacts an upper surface of the transmittance variable part, and an upper surface of the light transmitting part, and an upper surface of the high refractive part, respectively.