 Method for making an optical device using a laser beam interference pattern |
| To resolve the above described problems in the existing state of the art of the display devices ... |
|
| VLSI visual display |
| The present invention provides a visual display which comprises a miniature display compatible with ... |
|
| Display device having diffraction grating |
| The object of the present invention is to provide a display device having a diffraction grating ... |
|
| Virtual retinal display |
| We claim: 1. An apparatus for displaying an image directly on the retina of an eye comprising: a ... |
|
| Bi-directional optical transmission system |
| The present invention provides the desired bi-directional transmission system. The present ... |
|
| Automotive holographic signal lamp |
| To provide an improvement in automotive signal lamps over that previously provided, the present ... |
|
| Method and means for reducing undesirable effects of dirt particles on a flexible record device |
| The present invention provides methods and means for reducing the undesirable effects of bumps, ... |
|
| Hologram and method of and apparatus for producing the same |
| It is an object of the present invention to provide a hologram in which the optical contacting ... |
|
|
Polymer dispersion type liquid crystal display element and reflection type liquid crystal display device
| Details |
Inventors: Yamada, Nobuaki; Hirai, Toshiyuki; Onishi, Noriaki; Kohzaki, Shuichi;
Assignee: Sharp Kabushiki Kaisha (Osaka, JP)
Primary Examiner: Wu; Shean
Assistant Examiner:
Attorney, Agent or Firm:
A polymer dispersion type liquid crystal display element includes two layers of polymer dispersion type liquid crystal layers being overlaid and having liquid crystal drops positive in dielectric anisotropy dispersed in a polymer in which light scattering and transmission are controlled electrically, a transparent support element for scattering light between the polymer dispersion type liquid crystal layers, being interposed and a liquid crystal display device having a colored reflector plate disposed on the back of one polymer dispersion type liquid crystal layer. In one of the two layers of polymer dispersion type liquid crystal layers, a liquid crystal layer containing a dichroic dye is dispersed, and coloring and light transmission are electrically controlled, and a white reflector plate is disposed on the back side of one of the polymer dispersion type liquid crystal layers to realize the liquid crystal display device. By composing the liquid crystal display element and liquid crystal display device in such constitutions, both light scattering capacity and contrast may be enhanced at the same time. |
|
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Now referring to the drawing, the preferred embodiments of the invention are described below.
EXAMPLE 1 An embodiment of the invention is described in detail below by referring to FIG.
1.
FIG.
1 a shows a sectional view of the polymer dispersion type liquid crystal display element.
In the diagram, numerals 1 and 3 are transparent substrates, 2 is a transparent support element for scattering light, 4, 5, 6, 7 are transparent electrodes, 8 and 9 are polymer dispersion type liquid crystal layers, 10 and 11 are polymers, 12 and 13 are liquid crystal drops dispersed in the polymers 10 and 11, 14 is a viewing direction, and 15 is a colored reflector film.
Here, the transparent support element for scattering light 2 functions to spread the transmitted light from the polymer dispersion type liquid crystal layer 8 and introduces the transmitted light into the polymer dispersion type liquid crystal layer 9.
As a result, the light scattering capacity in the polymer dispersion type liquid crystal layer 9 is enhanced, thereby increasing the overall scattering intensity of the polymer dispersion type liquid crystal display element.
Therefore, the thickness and material of the transparent support element for scattering light 2 are particularly important as one of the elements for determining the scattering intensity of the polymer dispersion type liquid crystal display element.
The thickness of the transparent support element for scattering light 2 is preferred to be 10 .
mu.
m to 10 mm.
If the thickness is thinner than 10 .
mu.
m, it is difficult to form the transparent electrodes 5 and 6 on the transparent substrate, and gluing of the transparent substrates 1 and 3 and other processes are difficult, which is not preferable.
Or if the thickness of the transparent support element for scattering light 2 exceeds 10 mm, the distance from the polymer dispersion type liquid crystal layer 8 to the colored reflector film 15 is extended, and the viewing angle characteristic is extremely impaired
|
|
Optical Systems 
