Laser display system

• US 10,750,140 B2
• Filed: 07/21/2015
• Issued: 08/18/2020
• Est. Priority Date: 07/24/2014
• Status: Active Grant

• Current Assignee: Technical Institute Of Physics And Chemistry Of The Chinese Academy Of Sciences
• Original Assignee: Technical Institute Of Physics And Chemistry Of The Chinese Academy Of Sciences
• Inventors: Xu, Zuyan, Bi, Yong, Liu, Ke, Peng, Qinjun, Gao, Weinan, Zong, Nan
• Primary Examiner(s): Carter, William J
• Assistant Examiner(s): Cadima, Omar Rojas
• Application Number:
  US15/328,685
• Publication Number:
  US 20170223318A1
• Time in Patent Office: 1,855 Days
• Field of Search: 362259
• CPC Class Codes: G02B 27/09 Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for adapting the beam shape of a laser diode G02B19/0052; adapting the beam shape of an LED G02B19/0061; coupling into light guides using intermediate optical elements G02B6/4204; beam shaping specially adapted for lasers H01S3/005
• CPC Class Codes: G02B 27/10 Beam splitting or combining systems polarising systems G02B27/28; mixing and splitting light signals using optical waveguides G02B6/28; beam shaping, e.g. changing the cross-sectional area, by dividing or superposing multiple light beams G02B27/0905
• CPC Class Codes: G03B 21/006 using LCD's
• CPC Class Codes: G03B 21/008 using micromirror devices
• CPC Class Codes: G03B 21/20 Lamp housings
• CPC Class Codes: G03B 33/12 using beam-splitting or beam-combining systems, e.g. dichroic mirrors
• CPC Class Codes: G09G 2320/041 Temperature compensation
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: H04N 9/3105 for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators simultaneous projection in colour photography G03B33/10; beam splitting or combining systems per se G02B27/10
• CPC Class Codes: H04N 9/3144 Cooling systems cooling of liquid crystal cells in general G02F1/133382; cooling of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/16
• CPC Class Codes: H04N 9/3155 for controlling the light source light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406
• CPC Class Codes: H04N 9/3161 using laser light sources using laser beams scanning the display screen H04N9/3129
• CPC Class Codes: H04N 9/3164 using multiple light sources
• CPC Class Codes: H04N 9/317 Convergence or focusing systems electronic adjustment of convergence H04N9/3185; convergence or focusing arrangements for cathode ray tubes H04N9/28; means for automatic focusing of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/53
• CPC Class Codes: H04N 9/3182 Colour adjustment, e.g. white balance, shading or gamut white balance per se H04N9/73; control of amplitude of colour signals H04N9/68; colour control circuits for displays in general G09G5/02, G09G3/2003, G09G3/3607
• CPC Class Codes: H04N 9/3197 using light modulating optical valves

Abstract

A laser display system includes a red light semiconductor laser module (1), a green light semiconductor laser module (2), a blue light semiconductor laser module (3), a decoherence device (7, 8, 9), light valves (12, 13, 14), collimating and shaping devices (4, 5, 6), a heat dissipating modules (16-1, 16-2, 16-3), a temperature control module (17) and a semiconductor laser control module (18). The wavelength range output by the red light semiconductor laser module (1) is from 635 nm to 670 nm; the wavelength range output by the green light semiconductor laser module (2) is from 515 nm to 530 nm; the wavelength range output by the blue light semiconductor laser module (3) is from 440 nm to 460 nm.

Claims

1. A laser display system comprising a red light semiconductor laser module, a green light semiconductor laser module, a blue light semiconductor laser module, and a collimating and shaping device, a decoherence device, a light valve and an imaging lens that are arranged in sequence on output light paths of the red light semiconductor laser module, the green light semiconductor laser module and the blue light semiconductor laser module, respectively, wherein

the red light semiconductor laser module comprises at least one red light semiconductor laser unit, the green light semiconductor laser module comprises at least one green light semiconductor laser unit, the blue light semiconductor laser module comprises at least one blue light semiconductor laser unit, and at least one of the red light semiconductor laser module, the green light semiconductor laser module and the blue light semiconductor laser module comprises at least two corresponding semiconductor laser units having central wavelengths different from each other;

central wavelengths of the red light semiconductor laser units are selected from 635 nm to 670 nm;

central wavelengths of the green light semiconductor laser units are selected from 515 nm to 530 nm, central wavelengths of the blue light semiconductor laser units are selected from 440 nm to 460 nm, and the central wavelengths of the red, green and blue semiconductor laser units are different; and

the system further comprises a semiconductor laser control module, wherein the semiconductor laser control module respectively controls the red light semiconductor laser unit in the red light semiconductor laser module, the green light semiconductor laser unit in the green light semiconductor laser module and the blue light semiconductor laser unit in the blue light semiconductor laser module, selects each one of the red, green and blue semiconductor laser units and another one of the red, green or blue semiconductor laser unit based on appropriate central wavelengths to emit light according to color requirements of a display so as to form a first chromatic triangle defined by three central wavelengths of the selected each one of the red, green and blue semiconductor laser units and a second chromatic triangle defined by two of the three central wavelengths of two of the selected each one of the red, green and blue semiconductor laser units and one of the central wavelength of the selected another one of the red, green or blue semiconductor laser unit, wherein the one central wavelength of the selected another one of the red, green or blue semiconductor laser unit falls into a region not covered by the first chromatic triangle.

2. The laser display system according to claim 1, further comprising a temperature control module and multiple heat dissipating modules;

the red light semiconductor laser module, the green light semiconductor laser module and the blue light semiconductor laser module are respectively fixed on different heat dissipating modules;

the temperature control module respectively controls heat dissipating capacity of the multiple heat dissipating modules, so as to control a wavelength of the emitted laser.

3. The laser display system according to claim 1, wherein

the red light semiconductor laser module comprises at least two red light semiconductor laser units;

the green light semiconductor laser module comprises at least two green light semiconductor laser units;

the blue light semiconductor laser module comprises at least two blue light semiconductor laser units.

4. The laser display system according to claim 1, wherein the semiconductor laser units are composed of a single semiconductor laser emitter or a semiconductor laser array.

5. The laser display system according to claim 1, wherein a device performing beam combination is a beam combiner.

6. The laser display system according to claim 1, wherein a device performing beam combination is an X prism, a TIR prism or a spatial-timing combination device.

7. The laser display system according to claim 1, wherein the light valve is a transmission type liquid crystal light valve, a reflective type liquid crystal light valve or a digital micro-mirror.

8. The laser display system according to claim 1, wherein the collimating and shaping device is an aspherical lens, a cylindrical lens or a spherical lens;

the decoherence devices are micro optical devices, vibration reflectors, rotatable wave plates, multimode fibers or optical beam scanners.

9. A laser display system comprising a red light semiconductor laser module, a green light semiconductor laser module, a blue light semiconductor laser module, collimating and shaping devices, decoherence devices, a reflective film, a light guide plate and a liquid crystal panel, wherein

a corresponding collimating and shaping device and a corresponding decoherence device are respectively arranged in sequence on output light paths of the red light semiconductor laser module, the green light semiconductor laser module and the blue light semiconductor laser module;

three laser beams processed by the decoherence devices pass through the reflective film, the light guide plate and the liquid crystal panel in sequence to obtain a clear image;

the red light semiconductor laser module comprises at least two red light semiconductor laser units having central wavelengths different from each other, the green light semiconductor laser module comprises at least two green light semiconductor laser units having central wavelengths different from each other, and the blue light semiconductor laser module comprises at least two blue light semiconductor laser units having central wavelengths different from each other;

the central wavelengths of the red light semiconductor laser units are selected from 635 nm to 670 nm;

the central wavelengths of the green light semiconductor laser units are selected from 515 nm to 530 nm;

the central wavelengths of the blue light semiconductor laser units are selected from 440 nm to 460 nm, and the central wavelengths of the red, green and blue semiconductor laser units are different; and

the system further comprises a semiconductor laser control module, wherein the semiconductor laser control module respectively controls the red light semiconductor laser unit in the red light semiconductor laser module, the green light semiconductor laser unit in the green light semiconductor laser module and the blue light semiconductor laser unit in the blue light semiconductor laser module, selects each one of the red, green and blue semiconductor laser units and another one of the red, green or blue semiconductor laser unit based on appropriate central wavelengths to emit light according to color requirements of a display so as to form a first chromatic triangle defined by three central wavelengths of the selected each one of the red, green and blue semiconductor laser units and a second chromatic triangle defined by two of the three central wavelengths of two of the selected each one of the red, green and blue semiconductor laser units and one of the central wavelength of the selected another one of the red, green or blue semiconductor laser unit, wherein the one central wavelength of the selected another one of the red, green or blue semiconductor laser unit falls into a region not covered by the first chromatic triangle.

10. A system comprising:

a laser light source comprising a red light semiconductor laser module, a green light semiconductor laser module and a blue light semiconductor laser module, wherein

the red light semiconductor laser module comprises at least one red light semiconductor laser unit, the green light semiconductor laser module comprises at least one green light semiconductor laser unit, the blue light semiconductor laser module comprises at least one blue light semiconductor laser unit, at least one of the red light semiconductor laser module, the green light semiconductor laser module and the blue light semiconductor laser module comprises at least two semiconductor laser units having central wavelengths different from each other, and the central wavelengths of the red, green and blue semiconductor laser units are different; and

the system further comprises a semiconductor laser control module, wherein the semiconductor laser control module respectively controls the red light semiconductor laser unit in the red light semiconductor laser module, the green light semiconductor laser unit in the green light semiconductor laser module and the blue light semiconductor laser unit in the blue light semiconductor laser module, selects each one of the red, green and blue semiconductor laser units and another one of the red, green or blue semiconductor laser unit based on appropriate central wavelengths to emit light according to color requirements of a display so as to form a first chromatic triangle defined by three central wavelengths of the selected each one of the red, green and blue semiconductor laser units and a second chromatic triangle defined by two of the three central wavelengths of two of the selected each one of the red, green and blue semiconductor laser units and one of the central wavelength of the selected another one of the red, green or blue semiconductor laser unit, wherein the one central wavelength of the selected another one of the red, green or blue semiconductor laser unit falls into a region not covered by the first chromatic triangle.