JPH11174428A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain high resolution even when a liquid crystal(LC) element with low resolution is used by transmitting and shading pixels by the half unit a pixel in the LC display element by a shutter means. SOLUTION: In the case of supplying a video signal to the LC display element 1, ODD and EVEN signals constituting an interlaced signal are alternately impressed. In the case of an ODD video signal, image display is executed in each of cells in the element 1. Only images corresponding to the half cells out of the images of respective cells in the element 1 are transmitted based on the transmission/shading of images corresponding to the half cells by an LC shutter 2, so that only ODD images are extracted through the shutter 2. In the case of EVEN video signals also, the transmission/shading of EVEN video signals are shifted by a 1/2 pitch from that of ODD video signals and only images corresponding to the half cells out of the images of respective cells in the element 1 are transmitted based on the transmission/shading of images corresponding to the half cells by the LC shutter 2, so that only even images are extracted through the shutter 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device using a liquid crystal display device, and more particularly to a structure capable of displaying a high resolution image using a low resolution liquid crystal display device.

[0002]

2. Description of the Related Art For example, Japanese Unexamined Patent Publication No. Hei 8-262370 discloses that a stereoscopic display is not impaired even if a viewer's viewing position is shifted left and right with respect to a liquid crystal display screen. In order to obtain a liquid crystal display device that can maintain a high resolution and can be viewed as a high-precision stereoscopic image and can also be viewed as a normal image, a light-transmitting liquid crystal display element and a rear side of the liquid crystal display element are provided. A backlight having two light-emitting portions disposed therein, and a Fresnel lens for illuminating the liquid crystal display element by turning light from the backlight into parallel light, and temporally displaying images on the liquid crystal display element for the right eye and the left eye The light from the backlight is transmitted through the liquid crystal display element, and enters the right and left eyes of the observer independently of each other, and is synchronized with the switching display of the liquid crystal display element. By so as to blinking a backlight, the techniques to the image of the liquid crystal display device can be viewed as a stereoscopic video is disclosed.

[0003]

By the way, the liquid crystal display element becomes more expensive as the resolution becomes higher. If the liquid crystal display device is to be commercialized for general household use, it needs to be kept at a low price. A liquid crystal display element must be used. For this reason, satisfactory resolution cannot be obtained,
There is a problem that the willingness to purchase is halved.

Accordingly, an object of the present invention is to provide a liquid crystal display device which can obtain a high resolution by using a low resolution liquid crystal display element.

[0005]

According to the present invention, there is provided a liquid crystal display device comprising a liquid crystal display element and shutter means arranged in front of the liquid crystal display element, wherein the shutter is one of the pixels of the liquid crystal display element. Transmission and light shielding are possible in units of / 2.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a liquid crystal display device according to the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a schematic diagram showing the configuration of the liquid crystal display device of this embodiment. In the figure, 1 is a liquid crystal display element, 2
Is a liquid crystal shutter means disposed in front of the liquid crystal display element 1.

Each liquid crystal cell of the liquid crystal shutter means 2 has:
The liquid crystal display device 1 has a pitch width of の of that of the pixels of the liquid crystal display device 1, and transmits and blocks an image of each pixel of the liquid crystal display device 1 in units of the pitch width.

The operation in the case of displaying a video image using the liquid crystal display device having the above configuration will be described below. The video signal supplied to the liquid crystal display element 1 is an interlaced video signal, and a signal having a resolution twice as high as that of the liquid crystal display element is prepared as indicated by reference numeral 3 in FIG.

When such a video signal is supplied to the liquid crystal display element 1, the ODD, EV and
EN signal is applied alternately. In the case of an ODD video signal, an image is displayed by the signal for each cell of the liquid crystal display element 1. In this way, the displayed image of each cell of the liquid crystal display element 1 is transmitted by half of the image by the liquid crystal shutter means 2 and only half the image of the cell is transmitted by shading. As shown, only the ODD image passes through the shutter 2 and is taken out.

Also, in the case of the EVEN video signal, the transmission and shading are shifted by one pitch of the shutter 2 from the case of the ODD, and the displayed image of each cell of the liquid crystal display element 1 is displayed by the liquid crystal shutter means 2. Only half the image of the cell is transmitted by half transmission and shading, and only the EVEN image is transmitted through the shutter 2 and taken out as shown at 5 in FIG.

In this manner, the ODD and EVEN field images forming one interlaced frame image are obtained in correspondence with the interlaced video output ODD and EVEN period (1/120 sec), and are shown in FIG. As shown by, the image is apparently displayed as an interlaced image (1 / 60Sec) at twice the resolution of the liquid crystal display element 1.

Of course, if the cell pitch of the liquid crystal shutter 2 is further reduced, the resolution can be further increased, and it is needless to say that a mechanical shutter can be used instead of the liquid crystal shutter 2. .

[0014]

According to the present invention, an interlaced video signal is supplied to a low-resolution liquid crystal display element as described above.
ODD and EVEN of video by transmission and shading of shutter
By taking out the components, it becomes possible to display an image having a resolution twice as high as that of the liquid crystal display element.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram schematically showing a configuration around a liquid crystal display element of a liquid crystal display device of the present invention and an obtained image.

[Explanation of symbols]

 1 liquid crystal display element 2 liquid crystal shutter

Claims (1)

[Claims] 1. A liquid crystal display device comprising: a liquid crystal display element; and shutter means disposed in front of the liquid crystal display element, wherein the shutter means is capable of transmitting and blocking light in half a pixel of the liquid crystal display element. A liquid crystal display device characterized by the above-mentioned.