This application claims priority to Taiwan Application Serial Number 100145066, filed Dec. 7, 2011, which is herein incorporated by reference.
1. Technical Field
The present invention relates to a three-dimensional image display device.
2. Description of Related Art
In recent years, the display technology has been developed toward a three-dimensional display technology. The three-dimensional display technology is realized by using parallax of human eyes to provide two different images to two eyes, thereby generating three-dimensional feeling. Three-dimensional display techniques are primarily classified into two categories: viewing with glasses (glasses type) and viewing with naked eyes (auto-stereoscopic type). However, the auto-stereoscopic type has become mainstream recently due to inconvenience of wearing glasses.
The auto-stereoscopic technology may be achieved by projecting a left eye image and a right eye image to a left eye and a right eye respectively through parallax barriers or lenses for generating a three-dimensional image. Recently, a three-dimensional display technique has been applied to a portable device such as a cell phone or a tablet PC, etc., which may be viewed in a landscape mode or a portrait mode according to a user's selection. In order to enable three-dimensional displaying performance in those two modes, the parallax barriers or lenses has to be tilt disposed relative to a pixel array. However, conventional three-dimensional display devices fail to exhibit good three-dimensional displaying effects in both the landscape mode and the portrait mode.
Therefore, a novel three-dimensional display device is needed to solve the problems mentioned above.
An aspect of the present invention is to provide a three-dimensional image display device. The device includes a display panel and a plurality of light control units. The display panel includes a pixel array composed of a plurality of pixels. Each of the pixels has a plurality of sub-pixels. Each of the sub-pixels has an aspect ratio of about 1:1. The sub-pixels constitute a plurality of sub-pixel groups for displaying a plurality of image information groups. The light control units are employed for converting the image information groups to a plurality of view angle images. A symmetry axis of each of the light control units is substantially parallel to one of the diagonals of each of the sub-pixels.
In one embodiment, the sub-pixels constitute a plurality of rows of the sub-pixels and a plurality of columns of the sub-pixels, and an included angle between the symmetry axis of each of the light control units and an extending direction of each of the rows of the sub-pixels or an extending direction of each of the columns of the sub-pixels is about 45°.
In one embodiment, each of the sub-pixel groups has a portion of the sub-pixels which are arranged along a diagonal of each of the portion of sub-pixels
In one embodiment, each of the pixels includes four sub-pixels which constitute an odd number of the sub-pixel groups to display an odd number of the image information groups.
In one embodiment, each of the pixels includes a red sub-pixel, a green sub-pixel and a blue sub-pixel.
In one embodiment, each of the pixels further includes a fourth sub-pixel.
In one embodiment, the fourth sub-pixel is a red sub-pixel, a green sub-pixel, a blue sub-pixel, a white sub-pixel, a cyan sub-pixel, a magenta sub-pixel or a yellow sub-pixel.
In one embodiment, each of the pixels includes three sub-pixels which constitute the sub-pixel groups to display the image information groups.
In one embodiment, each of the light control units is a lens.
In one embodiment, each of the light control units is a parallax barrier.
Since the sub-pixel is a square and each of the light control units is substantially parallel to one of the diagonals of any one sub-pixel, the three-dimensional image display device shows excellent three-dimensional image displaying performance in both landscape mode and portrait mode.
The invention may be more fully understood by reading the following detailed description of the embodiment, with reference made to the accompanying drawings as follows:
Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.
As depicted in
Each of the pixels may be composed of a red sub-pixel (R), a green sub-pixel (G), a blue sub-pixel (B), and a fourth sub-pixel (4thSP).
The sub-pixels may form an odd number of sub-pixel groups to display an odd number of image information groups. The term “odd number” herein refers to 3, 5, 7 or more. The image information groups may be converted to view angle images through the light control units. In other words, the sub-pixels in the same sub-pixel group are employed to display one of the desired view angle images.
As depicted in
A configuration of the sub-pixel groups is exemplified in the below. The pixel array may be regarded as a plurality of columns constructed by the sub-pixels from top to bottom. The first column of sub-pixels are arranged and repeated in an order of 4thSP1, B2, 4thSP3, B1, 4thSP2 and B3 from left to right. The second column of sub-pixels are arranged and repeated in an order of G2, R3, G1, R2, G3 and R1. The third column of sub-pixels are arranged and repeated in an order of 4thSP3, B1, 4thSP2, B3, 4thSP1 and B2 from left to right. The fourth column of sub-pixels are arranged and repeated in an order of G1, R2, G3, R1, G2 and R3 from left to right. The fifth column of sub-pixels are arranged and repeated in an order of 4thSP2, B3, 4thSP1, B2, 4thSP3 and B1 from left to right. The sixth column of sub-pixels are arranged and repeated in an order of G3, R1, G2, R3, G1 and R2 from left to right. Similarly, the sub-pixels of following columns are arranged and repeated in the orders as described above.
In one embodiment, each of the sub-pixel groups has a portion of the sub-pixels arranged along a diagonal of each sub-pixel in the portion of the sub-pixels. In other words, the sub-pixels along the diagonal of each of the sub-pixels belong to the same sub-pixel group. The first sub-pixel group 122 includes one subgroup consisting of B1 and G1 and another subgroup consisting of 4thSP1 and R1, as depicted in
Afterwards, the image information groups shown by the first sub-pixel group 122, the second sub-pixel group 124 and the third sub-pixel group 126 may be respectively converted to a first view angle image, a second view angle image and a third view angle image through the light control units. While the left eye and the right eye of a viewer see the first and the second view angle images respectively or see the second and the third view angle images respectively, a three-dimensional image is formed.
If the sub-pixels in the pixel array construct an even number of sub-pixel groups, each of the sub-pixel groups merely includes two of the red-sub-pixel, the green sub-pixel, the blue sub-pixel and the fourth sub-pixel. For instance, the first column of sub-pixels are arranged and repeated in an order of 4thSP1, B2, 4thSP1, B2, 4thSP1, B2, 4thSP1 and B2. The second column of sub-pixels are arranged and repeated in an order of G2, R1, G2, R1, G2, R1, G2 and R1. Also, the sub-pixels of following columns are arranged and repeated in the orders mentioned above. One certain sub-pixel group formed merely includes the fourth sub-pixel and the red sub-pixel. The other sub-pixel group merely includes the blue sub-pixel and the green sub-pixel. Consequently, such a display device can only generate a view angle image with partial colors. The sub-pixels depicted in
In another aspect, the sub-pixels may construct a plurality of sub-pixel rows 117 and a plurality of sub-pixel columns 119. An included angle between a symmetry axis of each of the light control units and an extending direction of each of the sub-pixel rows 117 or an extending direction of each of the sub-pixel column 119 is approximately 45°. Specifically, an included angle between a vertical projection of the symmetry axis of the light control unit on a pixel array 110a and the extending direction of each of the sub-pixel row 117 or the sub-pixel column 119 is about 45°. For instance, the included angle may be 43°, 44°, 45°, 46° or 47°.
In one embodiment, the light control units may be lenses 134, as depicted in
In another embodiment, the light control units may be a plurality of parallax barriers 136, as depicted in
Since the sub-pixels are squares and the light control units are substantially parallel to one of the diagonals of each of the sub-pixels, the three-dimensional image display device 100 exhibit excellent three-dimensional image displaying effects in both the landscape mode and the portrait mode. As depicted in
The sub-pixels described above may construct two or more sub-pixel groups for displaying two or more image information groups. For example, the sub-pixels construct two sub-pixel groups, which are a first sub-pixel group 322 and a second sub-pixel group 324 shown in
In one embodiment, each of the sub-pixel groups has a portion of the sub-pixels arranged along a diagonal of each sub-pixel in the portion of the sub-pixels. In other words, the sub-pixels along the diagonal of each of the sub-pixels belong to the same sub-pixel group. The first sub-pixel group 322 includes a subgroup consisting of R1, G1, and B1, as depicted in
A symmetry axis of each of the light control units is substantially parallel to one of the diagonals of each of the sub-pixels, as depicted in
As mentioned above, the light control units are substantially parallel to one of the diagonals of each of the square sub-pixels such that the three-dimensional image display device shows excellent three-dimensional image displaying effects in both the landscape mode and the portrait mode. In addition, the aforementioned structures may be also applied in other three-dimensional display techniques.
Although the present invention has been described in considerable detail with reference to certain embodiments thereof, other embodiments are possible. Therefore, the spirit and scope of the appended claims should not be limited to the description of the embodiments contained herein.
It will be apparent to those skilled in the art that various modifications and variations may be made to the structure of the present invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the present invention cover modifications and variations of this invention provided they fall within the scope of the following claims.
Number | Date | Country | Kind |
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100145066 | Dec 2011 | TW | national |