CN102799058A - 3D (3-Dimensional) display system - Google Patents

Abstract

The invention is applicable to the field of display technology, and provides a 3D display system, which includes a signal decomposition unit, a projection display device and a polarization adjuster. In the present invention, the 3D video signal is firstly decomposed into six signals of left and right eyes red, green and blue, and then the red light, blue light of the left eye and green light of the right eye are used as one light signal, and the red light, blue light and left The green light of the eye is output as another optical signal in time-division and alternately; then, the polarization state of one of the optical signals is adjusted by using the polarization characteristics of the red, green, and blue lights after decomposition and recombination, and finally the left eye projected to the same screen The polarization state of the image signal is different from that of the right-eye image signal. At this time, 3D display can be realized without adding a polarizing plate, so that the light energy utilization rate of the 3D display system is greatly improved. In addition, the embodiment of the present invention realizes 3D display through only one projection display device, which simplifies the system structure and greatly reduces the cost.

Description

A 3D display system

technical field

The invention belongs to the field of display technology, in particular to a 3D display system.

Background technique

At present, there are three kinds of projection display technologies: LCD, DLP and LCOS. The efficiency of single-plate LCD and LCOS is generally low. In order to improve optical efficiency, 3-plate LCD and 3-plate LCOS generally adopt SPS color combination technology. In the optical part of the projector output, it is basically necessary to add double polarizers. The final The light effect is less than 1/4 of that of ordinary projection, and the utilization efficiency is very low.

Contents of the invention

The purpose of the embodiments of the present invention is to provide a 3D display system, aiming at solving the problem of low utilization rate of light energy in the existing 3D display system.

The embodiment of the present invention is achieved in this way, a 3D display system includes:

Signal decomposition unit, for decomposing the left-eye image signal into left-eye red light signal R1, left-eye green light signal G1 and left-eye blue light signal B1, and right-eye image signal into right-eye red light signal R2 and right-eye green light signal G2 and right eye blue light signal B2;

A projection display device for time-sharing projecting the left-eye red light signal R1, right-eye green light signal G2, left-eye blue light signal B1, and the right-eye red light signal R2, left-eye green light signal G1, and right-eye blue light signal B2 , causing the left-eye red light signal R1, right-eye green light signal G2, left-eye blue light signal B1, and the right-eye red light signal R2, left-eye green light signal G1, and right-eye blue light signal B2 to appear alternately on the same screen;

The polarization adjuster is used to adjust the polarization state of the light signal emitted from the projection display device, so that the polarization state of the left-eye image signal projected on the screen is different from the polarization state of the right-eye image signal.

In the embodiment of the present invention, the 3D video signal is first decomposed into six signals of red, green, and blue for the left and right eyes, and then the red light, blue light for the left eye, and green light for the right eye are used as one optical signal, and the red light, blue light for the right eye And the green light of the left eye is output as another optical signal in time-division alternately; then, the polarization state of one of the optical signals is adjusted by using the polarization characteristics of the red, green, and blue lights after decomposition and recombination, and finally the projection to the same screen The polarization state of the left-eye image signal is different from the polarization state of the right-eye image signal. At this time, 3D display can be realized without adding a polarizing plate, because the adjustment of the polarization state of the optical signal will not cause loss of light energy, so that the utilization rate of light energy of the 3D display system is greatly improved. In addition, the embodiment of the present invention realizes 3D display through only one projection display device, which simplifies the system structure and greatly reduces the cost. Therefore, the present 3D display system is especially applicable to 3LCD and 3LCOS of SPS color combination technology.

Description of drawings

FIG. 1 is a structural diagram of a 3D display system provided by an embodiment of the present invention;

FIG. 2 is a structural diagram of an optical part of a projection display device provided by an embodiment of the present invention;

Fig. 3 is a schematic diagram of the working principle of the liquid crystal optical rotator provided by the embodiment of the present invention (open state);

Fig. 4 is a schematic diagram of the working principle of the liquid crystal optical rotator provided by the embodiment of the present invention (off state).

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In the embodiment of the present invention, the 3D video signal is first decomposed into six signals of red, green, and blue for the left and right eyes, and then the red light, blue light for the left eye, and green light for the right eye are used as one optical signal, and the red light, blue light for the right eye And the green light of the left eye is output as another optical signal in time-division alternately; then, the polarization state of one of the optical signals is adjusted by using the polarization characteristics of the red, green, and blue lights after decomposition and recombination, and finally the projection to the same screen The polarization state of the left-eye image signal is different from the polarization state of the right-eye image signal. At this time, 3D display can be realized without adding a polarizing plate, because the adjustment of the polarization state of the optical signal will not cause loss of light energy, so that the utilization rate of light energy of the 3D display system is greatly improved. In addition, the embodiment of the present invention realizes 3D display through only one projection display device, which simplifies the system structure and greatly reduces the cost. Therefore, the present 3D display system is especially applicable to 3LCD and 3LCOS of SPS color combination technology.

The implementation of the present invention will be described in detail below in conjunction with specific embodiments.

As shown in Figures 1 and 2, the 3D display system provided by the embodiment of the present invention is a stand-alone 3D display system, that is, it has only one projection display device. The stand-alone 3D display system includes a signal decomposition unit 10 , a projection display device 11 and a polarization adjuster 13 . Wherein, the signal decomposing unit 10 respectively decomposes the left and right eye image signals into left eye red light signal R1, left eye green light signal G1, left eye blue light signal B1, right eye red light signal R2, right eye green light signal G2, The right eye blue light signal B2, the left and right eye image signals constitute a 3D video signal.

Usually, the projection display device 11 projects the left-eye red light signal R1, right-eye green light signal G2, left-eye blue light signal B1 and the right-eye red light signal R2, left-eye green light signal G1, right-eye red light signal R2, left-eye green light signal G1, right-eye The blue light signal B2 makes the left-eye red light signal R1, right-eye green light signal G2, left-eye blue light signal B1 and the right-eye red light signal R2, left-eye green light signal G1, and right-eye blue light signal B2 alternately appear on the same Screen. For example, at time T1, the projection display device 11 projects a left-eye red light signal R1, a right-eye green light signal G2, and a left-eye blue light signal B1 to the screen; at a time T2, the projection display device 11 projects a right-eye red light signal R2, The eye green light signal G1, the right eye blue light signal B2 are sent to the screen, the projection display device 11 projects the left eye red light signal R1, the right eye green light signal G2, and the left eye blue light signal B1 to the screen at time T3, T4 The projection display device 11 projects the right-eye red light signal R2 , the left-eye green light signal G1 , and the right-eye blue light signal B2 to the screen at any time, and so on, to form a dynamic 3D picture. It should be noted that the left-eye red light signal R1, right-eye green light signal G2, and left-eye blue light signal B1 projected to the screen at T1 and the right-eye red light signal R2 and left-eye green light signal G1 projected to the screen at T2 , The right eye blue light signal B2 is superimposed to form a 3D picture. Similarly, the left-eye red light signal R1, right-eye green light signal G2, and left-eye blue light signal B1 projected to the screen at time T3 and the right-eye red light signal R2, left-eye green light signal G1, and right-eye signal B1 projected to the screen at T4 time The eye blue light signal B2 is superimposed to form another 3D picture. According to the "persistence of vision" principle, as long as the time between each moment is short enough, dynamic 3D effects can be produced.

In the embodiment of the present invention, the polarization adjuster 13 adjusts the polarization state of the optical signal emitted from the projection display device 11 , so that the polarization state of the left-eye image signal projected to the screen 14 is different from that of the right-eye image signal. At this time, it is necessary to adjust the polarization state of the light signal emitted from the projection display device 11 at certain moments, so that the polarization state of the left-eye image signal projected onto the screen 14 is different from that of the right-eye image signal. For example, when the left image signal is S-polarized light, the right-eye image signal is P-polarized light, that is, the left-eye red light signal R1, left-eye green light signal G1, and left-eye blue light signal B1 that constitute the left image signal are all S-polarized light, forming the right-eye The right-eye red light signal R2, right-eye green light signal G2, and right-eye blue light signal B2 of the image signal are all P-polarized light; when the left image signal is P-polarized light, the right-eye image signal is S-polarized light, that is, the left-eye red light signal that constitutes the left image signal The light signal R1, the left-eye green light signal G1, and the left-eye blue light signal B1 are all P-polarized light, and the right-eye red light signal R2, right-eye green light signal G2, and right-eye blue light signal B2 constituting the right-eye image signal are all S-polarized light.

As can be seen from the above, the embodiment of the present invention decomposes the 3D video signal into six signals of left and right eyes red, green and blue, then uses the red light, blue light of the left eye and the green light of the right eye as one light signal, and converts the signal of the right eye The red light, blue light and the green light of the left eye are alternately output as another optical signal in time-division; then the polarization of one of the optical signals is adjusted by using the polarization characteristics of the red, green, and blue lights after decomposition and recombination, and finally the projection The polarization state of the left-eye image signal to the same screen is different from that of the right-eye image signal. At this time, 3D display can be realized without adding a polarizing plate, because the adjustment of the polarization state of the optical signal will not cause loss of light energy, so that the utilization rate of light energy of the 3D display system is greatly improved. In addition, the embodiment of the present invention realizes 3D display through only one projection display device, which simplifies the system structure and greatly reduces the cost. Therefore, the present 3D display system is especially applicable to 3LCD and 3LCOS of SPS color combination technology. It should be understood that the polarization characteristics of the red, green and blue light are S polarization characteristics, P polarization characteristics and S polarization characteristics formed by the liquid crystal panel, that is, red light is S polarization, green light is P polarization, and blue light is S polarization. Polarized.

Preferably, the polarization state of each primary color light signal of the left-eye image signal projected to the screen 14 (that is, the left-eye red light signal R1, the left-eye green light signal G1 and the left-eye blue light signal B1 projected to the screen 14) is maintained. Consistent, as S polarized light or P polarized light. Similarly, the polarization state of each primary color light signal of the right-eye image signal projected to the screen 14 (that is, the right-eye red light signal R2, right-eye green light signal G2, and right-eye blue light signal B2 projected to the screen 14) remains The same, and different from the polarization state of the left-eye image signal projected to the screen 14, such as P polarized light or S polarized light.

Usually, this 3D display system also includes polarized glasses 15 with two lenses, wherein the polarization direction of one lens is the same as the polarization state of the left-eye image signal projected onto the screen 14, and the polarization direction of the other lens is the same as that projected onto the screen 14. The polarization states of the right-eye image signals of the screen 14 are the same. Here, the 3D effect can be seen through the polarized glasses 15 .

In the embodiment of the present invention, the polarization adjuster 13 is disposed between the color combining prism and the projection lens of the projection display device, or the polarization adjuster 13 is disposed on the light emitting side of the projection lens of the projection display device. As shown in FIG. 2 , a polarization adjuster 13 is provided between the color combining prism 16 and the projection lens 17 of the display and projection device 11 , which makes the structure of the 3D display system simpler. Of course, the polarization adjuster 13 can also be provided on the light emitting side of the projection lens 17 of the projection display device, which provides great convenience for designing the 3D display system.

The above polarization adjuster 13 is preferably to adjust the left-eye red light signal R1, right-eye green light signal G2, left-eye blue light signal B1, or the right-eye red light signal R2, left-eye green light signal G1, right-eye blue light signal B2 The polarization state of the liquid crystal optical rotator 18, where the switch state of the liquid crystal optical rotator 18 is controlled by a circuit, as shown in FIGS. 3 and 4 . Further, the liquid crystal optical rotator 18 is a liquid crystal optical rotator that adjusts the incident P-polarized light and S-polarized light to output S-polarized light and P-polarized light respectively.

For example, the liquid crystal optical rotator 18 is in the open state at time T1, and the polarization states of the left-eye red light signal R1, right-eye green light signal G2, and left-eye blue light signal B1 emitted through it remain unchanged, that is, the polarization state of the projection display device 11 The left-eye red light signal R1 emitted by the color combining prism 16 and the liquid crystal optical rotator is still S polarized light, the right eye green light signal G2 is still P polarized light, and the left eye blue light signal B1 is still S polarized light; the liquid crystal optical rotator is in the off state at time T2 , the polarization state of the right-eye red light signal R2, left-eye green light signal G1, and right-eye blue light signal B2 emitted through it changes, that is, the right-eye red light that is originally S-polarized is emitted from the color combining prism 16 of the projection display device 11 at time T2 The signal R2 is adjusted to be P-polarized, the left-eye green light signal G1 that is originally P-polarized is adjusted to be S-polarized, and the right-eye blue light signal B2 that is originally S-polarized is adjusted to be P-polarized. So far, the left eye red light signal R1 projected to the screen at T1 is S polarized light, the right eye green light signal G2 is P polarized light, the left eye blue light signal B1 is S polarized light, and the right eye red light signal R2 projected to the screen at T2 is P polarized light. Polarized light, the left eye green light signal G1 is S polarized light, the right eye blue light signal B2 is P polarized light, the light signal at T1 time and the light signal at T2 time are projected to the screen 14 to be superimposed and recombined, the left eye red light signal R1 is S polarized light, The left eye green light signal G1 is S polarized light, the left eye blue light signal B1 is S polarized light, that is, the left eye image signal is S polarized light; the right eye red light signal R2 is P polarized light, the right eye green light signal G2 is P polarized light, and the right eye blue light The signal B2 is P-polarized light, that is, the right-eye image signal is P-polarized light, so the polarization state of the left-eye image signal is different from that of the right-eye image signal. At this time, the audience can watch the 3D image by wearing the aforementioned polarized glasses.

Similarly, the liquid crystal optical rotator 18 is in the open state at time T3, and the polarization states of the left-eye red light signal R1, right-eye green light signal G2, and left-eye blue light signal B1 emitted through it remain unchanged, that is, at time T3, the polarization state of the projection display device 11 The left-eye red light signal R1 emitted by the color combining prism 16 and the liquid crystal optical rotator is still S polarized light, the right eye green light signal G2 is still P polarized light, and the left eye blue light signal B1 is still S polarized light; the liquid crystal optical rotator is turned off at T4. state, the polarization state of the right-eye red light signal R2, left-eye green light signal G1, and right-eye blue light signal B2 emitted through it changes, that is, the right-eye red light that is originally S-polarized is emitted from the color combining prism 16 of the projection display device 11 at time T4 The light signal R2 is adjusted to be P-polarized, the left-eye green light signal G1 that is originally P-polarized is adjusted to be S-polarized, and the right-eye blue light signal B2 that is originally S-polarized is adjusted to be P-polarized. So far, the left eye red light signal R1 projected to the screen at T3 is S polarized light, the right eye green light signal G2 is P polarized light, the left eye blue light signal B1 is S polarized light, and the right eye red light signal R2 projected to the screen at T4 is P polarized light. Polarized light, the left-eye green light signal G1 is S-polarized light, the right-eye blue light signal B2 is P-polarized light, after the optical signal at T3 and the optical signal at T4 are superimposed and recombined, the left-eye red light signal R1 is S-polarized light, and the left-eye green light The signal G1 is S polarized light, the left eye blue light signal B1 is S polarized light, that is, the left eye image signal is S polarized light; the right eye red light signal R2 is P polarized light, the right eye green light signal G2 is P polarized light, and the right eye blue light signal B2 is P polarized light Polarized light, that is, the right-eye image signal is P-polarized light, so the polarization state of the left-eye image signal is different from that of the right-eye image signal. At this time, the audience can watch the 3D image by wearing the aforementioned polarized glasses.

In order to use the red light of the left eye, the blue light of the right eye and the green light of the right eye as one light signal, the red light of the right eye, the blue light of the blue light and the green light of the left eye are output as another light signal in time-sharing, and alternately projected to the same screen . The 3D display system further includes a switch for switching the left-eye green light signal G1 and the right-eye green light signal G2, so that the left-eye red light signal R1, the right-eye green light signal G2, and the left-eye blue light signal B1 are output as one optical signal, The right-eye red light signal R2, left-eye green light signal G1, and right-eye blue light signal B2 are used as the signal switching unit 19 for time-division output of another optical signal.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (7)

1. A 3D display system, characterized in that the 3D display system comprises: Signal decomposition unit, for decomposing the left-eye image signal into left-eye red light signal R1, left-eye green light signal G1 and left-eye blue light signal B1, and right-eye image signal into right-eye red light signal R2 and right-eye green light signal G2 and right eye blue light signal B2; A projection display device for time-sharing projecting the left-eye red light signal R1, right-eye green light signal G2, left-eye blue light signal B1, and the right-eye red light signal R2, left-eye green light signal G1, and right-eye blue light signal B2 , causing the left-eye red light signal R1, right-eye green light signal G2, left-eye blue light signal B1, and the right-eye red light signal R2, left-eye green light signal G1, and right-eye blue light signal B2 to appear alternately on the same screen; The polarization adjuster is used to adjust the polarization state of the light signal emitted from the projection display device, so that the polarization state of the left-eye image signal projected on the screen is different from the polarization state of the right-eye image signal. 2. The 3D display system according to claim 1, wherein the polarization states of the primary color light signals of the left-eye image signal projected to the screen are consistent, and the polarization states of the primary color light signals of the right-eye image signal projected to the screen are The polarization state of the signal remains the same. 3. The 3D display system according to claim 1 or 2, wherein the 3D display system further comprises polarized glasses with two lenses, wherein the polarization direction of one lens is consistent with the left-eye image projected onto the screen The polarization state of the signal is the same, and the polarization direction of the other lens is the same as the polarization state of the right eye image signal projected onto the screen. 4. The 3D display system according to claim 3, wherein the polarization adjuster is arranged between the color combining prism and the projection lens of the projection display device, or the polarization adjuster is arranged at the projection display device The light exit side of the projection lens. 5. The 3D display system according to claim 4, wherein the polarization adjuster adjusts the left-eye red light signal R1, the right-eye green light signal G2, the left-eye blue light signal B1, or the right-eye red light signal A liquid crystal optical rotator for the polarization states of the light signal R2, the left-eye green light signal G1, and the right-eye blue light signal B2. 6. The 3D display system according to claim 5, wherein the liquid crystal optical rotator is a liquid crystal optical rotator that adjusts the incident P-polarized light and S-polarized light to output S-polarized light and P-polarized light respectively. 7. The 3D display system according to claim 1 or 2, characterized in that, the 3D display system further comprises a device for switching the left-eye green light signal G1 and the right-eye green light signal G2, so that the left-eye red light signal R1, right-eye green light signal G2, and left-eye blue light signal B1 are output as one optical signal, and the right-eye red light signal R2, left-eye green light signal G1, and right-eye blue light signal B2 are output as another optical signal in time division Switch unit.

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