Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
1998-03-09
2001-08-28
Hjerpe, Richard (Department: 2674)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S156000, C345S156000, C349S008000, C349S095000
Reexamination Certificate
active
06281867
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a display panel and a projection type display apparatus, and is suitable, for example, for a full color display apparatus of the single plate type for effecting the display of a full color image by the use of a display panel with a microlens array like a microlens array provided on the light incidence surface of a liquid crystal display element.
2. Related Background Art
There have heretofore been proposed various projection type display apparatuses using a display panel with a microlens array of this kind. For example, Japanese Laid-Open Patent Application No. 8-114780 proposes a transmission type liquid crystal display element as a display panel with a microlens array.
FIG. 13
of the accompanying drawings is a cross-sectional view of the essential portions of a liquid crystal display element LP proposed in the abovementioned publication. In
FIG. 13
, the reference numeral
16
designates a microlens array comprising a plurality of microlenses
16
a
arranged at a predetermined pitch, the reference numeral
17
denotes a liquid crystal layer, and the reference numeral
18
designates R (red), G (green) and B (blue) pixels.
This element LP is designed such that when red, green and blue illuminating lights R, G and B are applied to the element LP from different angles, the respective color lights enter only corresponding color pixels
18
by the condensing action of the microlenses
16
a
. By this design, color filters can be eliminated in principle and accordingly, there is provided a display panel which is high in light utilization efficiency.
However, in such a conventional projection type display apparatus, R, G and B color pixels
18
are enlargedly projected onto a screen and therefore, as shown in
FIG. 14
of the accompanying drawings, the mosaic structure of the R, G and B pixels becomes conspicuous on the screen, and this has led to the disadvantage that the quality of a displayed image is reduced.
SUMMARY OF THE INVENTION
The present invention has as its object the provision of a display panel and a projection type display apparatus capable of displaying an image of high quality.
The display panel of the present invention is characterized by:
(1-1) a pixel unit array comprising pixel units having a combination of two of, first, second and third three color pixels disposed in a first direction and a combination of two color pixels differing from the combination of the two color pixels disposed in a second direction differing from the first direction, so as to share a color pixel, the pixel units being two-dimensionally arranged at a predetermined pitch on a substrate, and a microlens array comprising a plurality of microlenses in which the pitch of the two color pixels in the first direction and the second direction is one pitch, the plurality of microlenses being two-dimensionally arranged on the pixel unit array on the substrate.
The display panel of the present invention is characterized by:
(1-2) a pixel unit array comprising pixel units having a combination of first and second color pixels of, first, second and third three color pixels disposed in a first direction and a combination of the first and third color pixels disposed in a second direction differing from the first direction, so as to share the first color pixel, the pixel units being two-dimensionally arranged at a predetermined pitch on a substrate, and a microlens array comprising a plurality of microlenses in which the pitch of the two color pixels in the first direction and the second direction is one pitch, the plurality of microlenses being two-dimensionally arranged on the pixel unit array on the substrate.
Particularly, in the construction (1-1) or (1-2), the display panel of the present invention is characterized in that:
(1-2-1) the first color pixel is located at a position corresponding to the central portion of the microlenses, the second color pixel is located at a position corresponding to the boundary portion between the microlenses of the microlens array in the first direction, and the third color pixel is located at a position corresponding to the boundary portion between the microlenses of the microlens array in the second direction;
(1-2-2) the three color pixels comprise reflection electrodes and are comprised of liquid crystal of a reflection display mode;
(1-2-3) the three color pixels comprise reflection electrodes and use the DMD operation of the reflection electrodes; and
(1-2-4) the three color pixels utilize liquid crystal, and two microlens arrays in the same state of arrangement are provided at positions symmetrical with respect to a liquid crystal layer so as to sandwich the liquid crystal layer therebetween.
The projection type display apparatus of the present invention is characterized by:
(2-1) a display panel having a pixel unit array comprising pixel units having a combination of first and second color pixels of, first, second and third three color pixels disposed in a first direction and a combination of the first and third color pixels disposed in a second direction differing from the first direction, so as to share the first color pixel, the pixel units being two-dimensionally arranged at a predetermined pitch on a substrate, and a microlens array comprising a plurality of microlenses in which the pitch of the two color pixels in the first direction and the second direction is one pitch, the plurality of microlenses being two-dimensionally arranged on the pixel unit array on the substrate, the first color pixel being located at a position corresponding to the central portion of the microlenses, illuminating means for causing a first color light to enter the display panel perpendicularly thereto, causing a second color light to enter the display panel while being inclined in the first direction, and causing a third color light to enter the display panel while being inclined in the second direction, and projecting means for projecting a light beam light-modulated by the display panel onto a predetermined surface.
Particularly, the projection type display apparatus of the present invention is characterized in that
(2-1-1) light beams from the three color pixels constituting the pixel units pass through the same microlens and enter the projecting means.
The projection type display apparatus of the present invention is characterized by:
(2-2) a display panel having a pixel unit array comprising pixel units having a combination of first and second color pixels of, first, second and third three color pixels disposed in a first direction and a combination of the first and third color pixels disposed in a second direction differing from the first direction, so as to share the first color pixel, the pixel units being two-dimensionally arranged at a predetermined pitch on a substrate, and a microlens array comprising a plurality of microlenses in which the pitch of the two color pixels in the first direction and the second direction is one pitch, the plurality of microlenses being two-dimensionally arranged on the pixel unit array on the substrate, the first color pixel being located at a position corresponding to the central portion of the microlenses, illuminating means for causing a first color light to enter the display panel perpendicularly thereto, causing a second color light to enter the display panel while being inclined in the first direction, and causing a third color light to enter the display panel while being inclined in the second direction, and projecting means for projecting a light beam light-modulated by the display panel onto a predetermined surface, the reflected lights from the three color pixels constituting the pixel units light-modulated by the display panel passing through the same microlens and being directed to the projecting means.
Particularly, in the construction (2-1) or (2-2), the projection type display apparatus of the present invention is characterized in that
(2-2-1) the illuminating means color-resolves white light from a light source into a plurality of col
Koyama Osamu
Kurematsu Katsumi
Canon Kabushiki Kaisha
Hjerpe Richard
Morgan & Finnegan , LLP
Nguyen Kimnhung
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