JPS62161294A - Stereoscopic tv adapter - Google Patents

Abstract

PURPOSE:To make stereoscopic images from ordinary TV signals by switching a switching means synchronously with signals obtained by frequency dividing vertical synchronizing signals and controlling voltage application to a liquid crystal panel. CONSTITUTION:Video signals from which synchronizing signals are removed in a synchronizing signal removing circuit 6 are delayed for a fixed time by a delay circuit 7 and switched alternately with undelayed video signals by a switching circuit 8. A signal obtained by 1/2 frequency dividing a vertical synchronizing signal V is used as a switching control signal, and the switching circuit 8 is switched at every field. The signals are composed with synchronizing signals by a synthesizing circuit 9 and inputted to a TV receiving set 4. On the other hand, voltage application to a liquid crystal panel 2 is controlled by the output of a frequency dividing circuit 11. When TN liqiud crystal is used, the plane of polarization of incident light is deviated by 90 deg. by optical activity when voltage is not applied. When the plane of polarization of lenses of polarization glasses is deviated by 90 deg. between the left eye and right eye, the rays of light to the left eye and right eye are switched alternately by applica tion of voltage to the liquid crystal panel. Thereby, stereoscopic image can be obtained from ordinary TV images.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a stereoscopic TV adapter that can be added to a normal TV receiver to obtain a pseudo-stereoscopic image.

[Prior art and its problems]

Conventional 3D televisions are composed of a dedicated TV receiver, and the configuration thereof is also complicated. Furthermore, some TV receivers cannot be used in general TV receivers.

[Problem that the invention seeks to solve]

The present invention has been made to overcome the above-mentioned conventional problems to a lesser extent,
A polarizing plate and liquid crystal panel are installed on the front of a regular TV receiver.
The normal σT It provides a perspective of viewing the issue as a three-dimensional image.

[Embodiments of the invention]

Fig. 1 shows an embodiment of the stereoscopic TV adapter according to the present invention. .

A polarizing plate 3, a liquid crystal panel 2, and a glass plate 1 are arranged in front of a TV receiver 4. On the other hand, the video signal (baseband) is transmitted from point A to the synchronization signal removal circuit 6 and the synchronization separation circuit 1.
It is input to 0.

A delay circuit 7 is connected to the output of the synchronous signal removal circuit 6,
The output of the delay circuit 7 and the output of the synchronous signal removal circuit 6 are connected to the input of the switch circuit 8, respectively.

Further, a frequency dividing circuit 11 is connected to the output of the synchronous separation circuit 10, and its output is connected to a switch circuit 8 and the liquid crystal panel 2, and further, a synchronous separation circuit 10 and a switch circuit 8 are connected to a synthesis circuit 9. is connected and its output is T
The signal is input to the V receiver 4. Then, a stereoscopic image is reproduced using the polarized glasses 5.

Next, the operation of the present invention will be explained. 1. It is sufficient to electrically realize that the positions seen by the left eye and the right eye are slightly shifted in the horizontal direction.

Therefore, in FIG. 3!1, the video signal from which the synchronizing signal has been removed by the synchronizing signal removing circuit 6 is delayed by a predetermined period of time in the delay circuit 7. This delay time provides the difference in horizontal position seen by the left and right eyes. The delayed video signal and the non-delayed video signal are alternately switched by the switch circuit 8. As this switching control signal, a signal obtained by frequency-dividing the vertical synchronization signal 4F and V obtained by the synchronization separation circuit 10 by V2 is used. As a result, the switch circuit 8 is switched to one field. The signal obtained by switching between the delayed video signal and the non-delayed video signal for each field is sent to the synthesis circuit 9 by a synchronizing signal (I(+V, l).
and is input to the TV receiver 4.

On the other hand, voltage application to the liquid crystal panel 2 is controlled by the output of the frequency dividing circuit 11. When a TN liquid crystal (Lystede, nematic) is used as the liquid crystal, when no voltage is applied, the polarization plane of the incident light is shifted by 90° due to polarization, but when a voltage is applied, this optical rotation is not lost. be exposed. talent/
If the polarizing plate 3, liquid crystal panel 2, and polarized glasses 5 are arranged as shown in Figure 1, and the polarization planes of the lenses of the polarized glasses are shifted by 90 degrees between the left eye and the stone eye, the voltage applied to the liquid crystal panel will 1. The source of the left eye and right eye is switched from father to father.

Figures 1 and 2 C (21) show 1. When no pressure is applied, images are obtained only for the right eye.

Figure 212 (BL is when the full voltage is applied to the liquid crystal panel, and an image is obtained only for the left eye. In Figure 212, the liquid crystal panel switches between a delayed image and a non-delayed image for each field.
This shows how polarized glasses separate the image into left and right sides.

In the above embodiment, an adapter that pseudo-stereoscopicizes a normal TV image was described, but for example, if a broadcasting station (or a video lease such as a video disk) iM'i
If the left and right images are switched and sent for each field, a means to pass the delay circuit shown in Figure 1 should be provided, or the function should be stopped by setting the switch circuit 8 to the lower side. , similarly can reproduce stereoscopic images.

〔Effect of the invention〕

As described above, according to the present invention, ordinary TV images can be made into three-dimensional images simply by adding it to a conventional TV receiver, and even in the case of leasing three-dimensional images, this can be done with just a simple switch. In addition, since the glasses only use polarized lenses, they are lightweight and do not require cords, making it possible to comfortably enjoy stereoscopic images.

[Brief explanation of drawings]

Figure 3.1 shows a two-body 1' V adapter according to the present invention.
Figures (a), 113 and 113 are diagrams for explaining the present invention in detail. 1...Glass plate 2...Liquid crystal panel 3...Polarized light Board 4-... TV receiver 5... Polarized glasses 6-... Synchronous signal removal circuit 7... Delay circuit 8... Switch circuit 9. ... Synthesis circuit 10 ... Synchronization separation circuit 11 ... Frequency division circuit Patent applicant Pioneer Corporation Fig. 1 Fig. 2

Claims (1)

[Claims] A polarizing plate and a liquid crystal panel provided on the front of the TV receiver, and a synchronization separation means for separating a synchronization signal from a video signal;
synchronous removing means for removing a synchronous signal from a video signal; delay means for delaying a video signal; switching means for switching between the delayed video signal and a non-delayed video signal; and separating the vertical synchronous signal obtained by the synchronous separation means. and a signal synthesizing means for synthesizing the delayed and non-delayed video signals switched by the switching means with a synchronizing signal, the switching means synchronizing with the frequency-divided signal of the vertical synchronizing signal. A three-dimensional TV adapter, characterized in that the three-dimensional TV adapter controls voltage application to the liquid crystal panel.