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Display unit including first and second active matrix regions that is provided completely outside each other
| Details |
Inventors: Hirakata, Yoshiharu; Yamazaki, Shunpei; Teramoto, Satoshi; Koyama, Jun;
Assignee: Semiconductor Energy Laboratory Co., Ltd. (Kanagawa-ken, JP)
Primary Examiner: Sikes; William L.
Assistant Examiner: Chowdhury; Tarifur R.
Attorney, Agent or Firm: Fish & Richardson P.C.
Active matrix domains are integrated and disposed on one and the same substrate. Then, directions of orientation are differentiated by 90.degree. for one active matrix domain and the other active matrix domain. As a result, two images whose polarizing directions differ by 90.degree. are formed when images formed in the two active matrix domains are combined. Then, one image is appropriated as an image for right eye and the other image as an image for left eye and the combined image is seen by wearing glasses equipped with polarizing filters whose polarizing directions are different by 90.degree. for the right and left eyes. Then, the image for the right eye and that for the left eye may be seen independently and a stereoscopic image may be obtained. |
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DETAILED DESCRIPTION OF THE INVENTION 1.
Field of the Invention The present invention disclosed in the present specification relates to a display unit which can display a three-dimensional image or two different images on one and the same screen.
2.
Description of Related Art Hitherto, there has been known a method of obtaining a three-dimensional image by separately perceiving an image for right eye and that for left eye by utilizing different polarization states.
There has been also known a technology for obtaining a three-dimensional image by forming an image for right eye and that for left eye by utilizing two projectors and by viewing them independently by the right and left eyes (see "Three-Dimensional Display" by Chihiro Masuda, Sangyo Tosho Publishing Co.
).
However, there have been problems in realizing a display unit having such formation that it would be complicated, the production cost thereof would be high and their reliability would be low.
Further, because of the increased complexity and size of the whole structure thereof, it has been difficult to apply it simply as various display means.
For example, the display means thereof has not been able to be applied simply to game machines, to display units of public facilities and to medical purposes.
That is, because the unit itself has been complex and large, its general utility has been low.
Accordingly, it is an object of the present invention to be disclosed in the present specification to provide a display unit whose cost is low, which is highly reliable and which can display three-dimensional images, thus having an excellent general utility.
Further, it is an object to provide a display unit having a formation which allows to display two different images on one screen in the same time by the same principle with the display of the three-dimensional image.
SUMMARY OF THE INVENTION According to one invention disclosed in the present specification, a display unit has a first liquid crystal panel and a second liquid crystal panel; and means for projecting images from those two liquid crystal panels on one and the same projecting face in superposition; and is characterized in that the two liquid crystal panels have first polarizing plate and a second polarizing plate in order from a light source; and a polarizing direction of the first polarizing plate of the first liquid crystal panel and a polarizing direction of the second polarizing plate of the second liquid crystal panel are same or almost same
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LCD 
