Liquid crystal display unit
View Patent ↗A reflector has protuberances and recesses in each pixel region. The distances between the respective peaks of each two adjacent protuberances in the pixel region are distributed in the range from 5 μm to 15 μm. The incidence of peak distances within the range of ±0.5 μm from the most frequent peak distance ranges from 40% to 80%, and the area of regular reflection surfaces of the reflector tilted at angles of 4.5° or less to the principal surface of a substrate in the pixel region accounts for 35% or less of the area of the pixel region.
1. A liquid crystal display unit comprising:
a liquid crystal layer sandwiched between first and second substrates,
the first substrate including a reflector for reflecting incident light guided through the second substrate and the liquid crystal layer,
the reflector having a plurality of protuberances and recesses in each pixel region,
the distances between the respective peaks of each two adjacent protuberances in the pixel region being distributed in the range from 5 μm to 15 μm, with the incidence of peak distances within the range of ±0.5 μm from the most frequent peak distance ranging from 40% to 80%,
the area of regular reflection surfaces of the reflector tilted at angles of 4.5° or less to the principal surface of the first substrate in the pixel region accounting for 35% or less of the area of the pixel region.
2. A liquid crystal display unit according to claim 1 , wherein said reflector includes a plurality of pixel electrodes formed of a reflective metallic material.
3. A liquid crystal display unit according to claim 1 , wherein said first substrate has an insulating film as the ground of the reflector.
4. A liquid crystal display unit according to claim 3 , wherein said insulating film includes an organic insulating film.
5. A liquid crystal display unit according to claim 4 , wherein said organic insulating film is formed of a photosensitive resin.
6. A liquid crystal display unit according to claim 1 , wherein said first substrate has a reflective region having a reflector scattering incident light guided through the second substrate and the liquid crystal layer and a light transmitting region transmitting incident light guided through the first substrate.
7. A liquid crystal display unit according to claim 1 , wherein the average height from the bottom of the each recess to the peak of each protuberance thereof is 1.2 μm or less.
8. A liquid crystal display unit according to claim 7 , wherein said average height of protuberances and recesses is 0.1 μm or more.
9. A liquid crystal display unit according to claim 1 , wherein the peak distances between the protuberances in the peak distance distribution range from 7.5 μm to 12.5 μm.
10. A liquid crystal display unit comprising:
a liquid crystal layer sandwiched between first and second substrates,
the first substrate including a reflector for reflecting incident light guided through the second substrate and the liquid crystal layer,
the reflector having a plurality of protuberances and recesses in each pixel region,
the distances between the respective peaks of each two adjacent protuberances in the pixel region being distributed in the range from 5 μm to 15 μm, with the incidence of peak distances within the range of ±0.5 μm from the most frequent peak distance ranging from 40% to 80%,
the average height from the bottom of the each recess to the peak of each protuberance thereof ranging from 0.1 μm to 1.2 μm.