The working principle of stereo LCD display

Due to the human eye is used 3D stereo images in daily life, therefore, that including movies and other displays is shown in the picture should also be stereo images, amazing, however this unconscious needs, but for a long time because of the constraints on science and technology, fast and there’s no resistance to accept, two-dimensional images. After the digital information revolution, in addition to promoting the early arrival of multimedia society, it also reignited the urgent demand for three-dimensional images in the fields of medicine, animation, CAD/CAM, and so on. In view of this, this paper will introduce the trend of using LCD to produce a 3D images.

3D image divider

Japanese SANYO company is the earliest engaged in studies of three-dimensional imaging technology, as early as in 94 launched without special glasses 3D image segmentation, using the image segmentation can be used to view and admire the three-dimensional dynamic images, basically it is according to the principle of parallax barrier make video interaction first arranged by slender columns grating by two eyes capture after observation, due to the longitudinal image into the left and right eye due to the parallax barrier separated, left and right eye images captured by the small deviation, finally read through the retina as a three-dimensional image.


Use this kind of principle to be able to be aimed at the most appropriate position when seeing a picture, in addition, to provide the eye shadow image of the left and right of the viewer, from the image front display area to the area covered by the optimal distance, for the viewer to become a normal stereo 3D image. However, images adjacent to the two eyes will be unconsciously captured and read by the left and right eyes to form the so-called reverse field of vision. In other words, viewers using this 3D image segmentation must be fixed at a certain viewing position to produce stereoscopic vision.


In order to improve the lack, therefore, developed the head detection system, using this detection system can detect view at any time the head position, once produce inverse visual field monitor switch immediately around eyes read by image, so that not only can prevent the occurrence of the inverse apparent problem but can also enlarge the three-dimensional stereo images of considerable scope.

However, in the actual use of the upper head detection system, it was found that the interfaces in each diamond area were non-long and narrow, resulting in poor viewing performance, such as subtle overlapping images, distortion, and black vertical stripes, and easy eye pain and fatigue. Given this SANYO change the system to constitute by the liquid crystal electronic drive head detection system of movable type, if the scanning head moving to the interface area, the new test system can immediately test the head, and to move the opening of a three-dimensional image segmentation, which means it is using the detector to detect and monitor view of head position and will feedback the detection result to the image segmentation, adjustment and control is shown on the LCD display the image of the left and right eyes position, take advantage of this new technology view and who can watch to a wide range of three-dimensional stereo images.




Three-dimensional image display

The biggest drawback of the above electron-driven LCD head detection system is that the viewing distance (the distance from the screen of the display to the viewer) in the stereo viewing area still exists, so it is greatly limited in application. In order to shorten the viewing distance and expand the application field, a new generation three-dimension display is developed. The new display features:

(A) Significant expansion of stereoscopic views (three times greater than before)

Traditional 3D image display without special glasses, the same horizontal direction of the small picture before and after the stereo visual range is larger than the big picture stereo visual range, this is because the small picture perspective is relatively small, LCD and image segmentation is less likely to produce the so-called moire interference. This physical phenomenon is used to divide the LCD display and the image divider into 16 equal parts by electronic means to control the exclusive area.



In other words, it can adjust the opening position of the image splitter and the image in the LCD display to the most appropriate state according to the viewer’s position, so that no matter the stereoview is far or near, the viewer can see the three-dimensional stereo image. Based on the LCD display at the top of the 3D view of the heat detection system that detects the secondary yuan location data (or so) before and after, at the same time control switch and LCD display left and right eye image, and image segmentation opening position, for the stereoscopic view area outside of the view, is to control the individual image segmentation, the results before and after the direction of the stereoscopic view area more than three times bigger than ever before.

(B). The most appropriate stereoscopic viewing area can be effectively controlled

In the past, the parts outside the stereoscopic viewing area of the display are prone to waviness, distortion, or local reversed-vision problems, resulting in easy eye fatigue and difficulty in viewing stereoscopic images. The new electronic image divider and LCD display can monitor the condition of the viewer at any time to maintain the most appropriate stereo viewing position.

(C). Capable of displaying high-quality quadric images

As long as the shutter of the electronic-driven LCD is turned off, the second-element image of the same quality as the general flat display can be obtained.

(D) Low cost

The control method and structure of the new electronic image divider and LCD display are very simple, so it has the potential of cheapening.

Application of 3D image display

At present, 3D image display is mainly applied in the work staTIon, cartoon and other animation production, medical use, educational use, aviation, automobile simulation teaching, electronic game instrument, and other fields. Examples include stereoscopic endoscopy, stereomicroscope, surgery using guidance system, medical diagnosis using CT, MRI, visual function examination, medical education, medical training, etc.


The working principle of stereo LCD display conclusion:  Although the new generation of 3d stereoscopic displays addresses many of the drawbacks and greatly increases the viewing range, they also face practical challenges such as low consumer awareness, high prices, and the ability to only use one person. As for the problem of single users, we have drawn up a plan to explore and develop a multi-dimensional display for multiple users. Besides, precision, mass production, and control of ripples are also projects to be overcome. It is expected that in the future, the market of 3D images will expand with the progress of software and hardware technologies, which means that it is more important to keep abreast of the fluctuations of the market and timely provide relevant technologies.

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The working principle of stereo LCD display