CN204790300U - Three -dimensional projection arrangement - Google Patents

Abstract

The utility model provides a three-dimensional projection device, which includes a controller, a projection light source, a first projection lens, a second projection lens, and a beam modulator for modulating the beam generated by the projection light source and projecting two beams; The device outputs a control signal to the beam modulator; one beam of the two beams is projected from the first projection lens, and the other beam is projected from the second projection lens for displaying a three-dimensional image. The three-dimensional projection device is not only small in size, but also low in cost, and can simplify the assembly process of the entire three-dimensional projection device when a single projection focusing mechanism is used for focusing.

Description

3D projection device

technical field

The utility model relates to a projection device for three-dimensional imaging, in particular to a three-dimensional projection device with a single beam modulator and double projection lenses.

Background technique

Because the 3D scene has depth information and has a stereoscopic effect, the reason why the human eye can feel the stereoscopic effect of the 3D scene is that the two eyes arranged side by side horizontally are separated by a certain distance, so there are differences in the viewing angles of the same scene at the same time. The difference is also called parallax. The two images with parallax observed by the two eyes produce a three-dimensional sense through the fusion reflection and visual psychological reaction of the visual nerve center.

In order to be able to perform three-dimensional recording and playback of the scene, it is necessary to use a three-dimensional photography device to record and then project it through a three-dimensional projection device to present a three-dimensional image. A commonly used three-dimensional projection device includes a controller, a first projection light source, a second projection light source, a first liquid crystal panel, a second liquid crystal panel, a first projection lens and a second projection lens; Output control signals to the first liquid crystal panel and the second liquid crystal panel respectively; as a beam modulator, the first liquid crystal panel is controlled by the controller to modulate the beam generated by the first projection light source and project it from the first projection lens, and the second The liquid crystal sheet is controlled by the controller to modulate the light beam generated by the second projection light source and project it from the second projection lens, and the light beams projected by the two lenses are superimposed on each other to present a three-dimensional image.

Since the controller outputs control signals to the first liquid crystal panel and the second liquid crystal panel respectively, it is difficult to control the two to modulate the light beam synchronously. In addition, the whole three-dimensional imaging device needs to use two sets of driving circuits to drive the beam modulator.

Contents of the invention

The main purpose of the utility model is to provide a projection device for three-dimensional imaging.

In order to achieve the above-mentioned main purpose, the utility model provides a projection device for three-dimensional imaging, which includes a controller, a projection light source, a first projection lens, a second projection lens, and a beam used to modulate and project the light beam generated by the projection light source. A beam modulator that emits two beams; the controller outputs a control signal to the beam modulator; one of the two beams projected from the beam modulator is projected from the first projection lens, and the other beam is projected from the second projection lens The lens projects out and is used to visualize three-dimensional images.

It can be seen from the above solutions that, compared with the prior art, one less set of drive circuits for the beam modulator can be used, which can not only effectively reduce its volume, enable it to be used in equipment with higher volume requirements, but also reduce costs; If the same projection focusing mechanism is used to synchronously adjust the focus of the two projection lenses, there is no need to adjust the two beam modulators to a coplanar arrangement, which simplifies the assembly process of the three-dimensional projection device. In addition, it is convenient for the controller to control synchronous modulation to generate light beams projected to the two projection lenses, and it is convenient for synchronously projecting two two-dimensional images and superimposing and displaying three-dimensional images.

A specific solution is that the beam modulator is a DMD chip, and the projection light source includes an illuminant, a converging lens, a color wheel, and a beam expander lens sequentially arranged along the optical path of the light beam generated by the illuminant.

Another specific solution is that the beam modulator is a liquid crystal panel.

A preferred solution is to further include a projection focusing mechanism, the projection focusing mechanism includes a projection focusing actuator for simultaneously driving the first projection lens and the second projection lens to perform synchronous focus adjustment, and the controller sends the projection focus adjustment actuator The actuator outputs a focus control signal.

It can be seen from the above solution that it is convenient for the two projection lenses to adjust the focus synchronously.

Description of drawings

Fig. 1 is a system block diagram of the first embodiment of the utility model;

Fig. 2 is a structural schematic diagram of the first projection lens, the second projection lens, the liquid crystal sheet, the first projection light source and the second projection light source in the first embodiment of the present invention;

Fig. 3 is a schematic diagram of the optical path of the first embodiment of the utility model;

Fig. 4 is the front view of the mobile terminal device installed with the second embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a mobile terminal device installed with a second embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a mobile terminal device installed with a third embodiment of the present invention;

Fig. 7 is a partial enlarged view of A in Fig. 6 .

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Detailed ways

first embodiment

Referring to FIG. 1 , the 3D projection device 1 has a first projection light source 11 , a second projection light source 12 , a liquid crystal panel 13 , a first projection lens 14 , a second projection lens 15 , a controller 16 and a communication interface 17 .

Controller 16 receives the signal that carries three-dimensional image information from external equipment through communication interface 17, and communication interface 17 can be wired interface, also can be wireless interface; Controller 16 outputs control signal to liquid crystal panel 13 according to three-dimensional image information, thereby controls The liquid crystal panel 13 modulates the light beams generated by the first projection light source and the second projection light source.

Referring to Fig. 2 and Fig. 3, the first light beam produced by the first projection light source 11 is projected from the first projection lens 14 after being modulated by the liquid crystal panel 13, and the second light beam produced by the second projection light source 12 is modulated by the liquid crystal panel 13 Projected from the second projection lens 15, it is used to present a three-dimensional image.

The first projection light source 11 and the second projection light source 12 are backlight sources, which may be LED light sources or laser light sources.

During the three-dimensional projection process, under the control of the controller 16, the first projection lens 14 and the second projection lens 15 perform synchronous focus adjustment through the projection focusing mechanism. The mover of the mover is fixedly connected with the focusing lens groups of the first projection lens and the second projection lens through the transfer member, so that the first projection lens and the second projection lens can be driven simultaneously for synchronous focus adjustment.

Actuators such as piezoelectric actuators or voice coil motors may be used as projection focusing actuators.

second embodiment

Referring to FIG. 4 , a three-dimensional projection device 22 is provided at the front end of the casing 21 of the mobile terminal device 2 .

5, the three-dimensional projection device 22 is composed of a projection light source 221, a liquid crystal sheet 222, a projection focusing mechanism 223, a first projection lens 224, a second projection lens 225, a controller and a communication interface. The storage unit is connected by communication, and the controller reads the three-dimensional image information to be projected from the storage unit through the communication interface, and outputs a control signal to the liquid crystal panel 222 to control the liquid crystal panel 222 to modulate the light beam generated by the projection light source 221.

The projection focus adjustment mechanism 223 has a projection focus adjustment actuator, and the mover of the projection focus adjustment actuator is fixedly connected with the focus adjustment lens groups of the first projection lens 224 and the second projection lens 225 at the same time through a transmission member, so that they can simultaneously drive The first projection lens 224 and the second projection lens 225 perform synchronous focusing. The projection focusing actuator may be an actuator such as a piezoelectric actuator or a voice coil motor.

The light beam generated by the projection light source 221 is modulated by the liquid crystal panel 222 to project two light beams, and the two light beams are projected from the first projection lens 224 and the second projection lens 225 in one-to-one correspondence for displaying a three-dimensional image.

The projection light source 221 is a backlight source, which may be an LED light source or a laser light source.

third embodiment

As an illustration of the third embodiment of the present invention, only the differences from the above-mentioned second embodiment will be described below.

Referring to FIG. 6 and FIG. 7 , a DMD chip 322 is used instead of a liquid crystal panel, and its projection light source is composed of a luminous body 3211 , a converging lens 3212 , a color wheel 3213 and a beam expanding lens 3214 . The illuminant 3211 can be LED or laser.

The light beam generated by the illuminant 3211 is projected on the DMD chip 322 after passing through the converging lens 3212, the color wheel 3213 and the beam expander lens 3214. The controller controls the DMD chip 322 to modulate the received light beam and project two The two beams are projected from the first projection lens 324 and the second projection lens 325 in a one-to-one correspondence for displaying a three-dimensional image.

Applicable objects of the present invention include but are not limited to the mobile terminal devices in the above embodiments, and the mobile terminal devices include but not limited to smart phones and tablet computers.

Claims (4)

1. A three-dimensional projection device, including a controller, a projection light source, a first projection lens and a second projection lens; It is characterized by: a beam modulator for modulating the beam generated by the projection light source and projecting two beams; the controller outputs a control signal to the beam modulator; One of the two beams projected from the beam modulator is projected from the first projection lens, and the other is projected from the second projection lens. 2. The three-dimensional projection device according to claim 1, characterized in that: The beam modulator is a DMD chip; The projection light source includes an illuminant, a converging lens, a color wheel, and a beam expanding lens sequentially arranged along the light path of the light beam generated by the illuminant. 3. The three-dimensional projection device according to claim 1, characterized in that: The beam modulator is a liquid crystal panel. 4. The three-dimensional projection device according to any one of claims 1 to 3, characterized in that: It also includes a projection focusing mechanism; The projection focusing mechanism includes a projection focusing actuator for simultaneously driving the first projection lens and the second projection lens for synchronous focusing; The controller outputs a focus control signal to the projection focus actuator.