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Method for eliminating laser display speckles and laser source

A technology of laser display and laser light source, which is applied in the field of laser light source and laser display speckle elimination, can solve the problems that the beam cannot be used in laser TV, reduce the quality of beam, and damage the utilization rate of light energy, etc., so as to improve the quality of laser display and eliminate Speckle, the effect of increasing utilization

Inactive Publication Date: 2016-03-02
BEIJING UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0004] Although these methods can suppress the generation of speckle, however, since the laser beam needs to be processed by a decoherent element after it is emitted, the utilization rate of light energy is greatly damaged, the quality of the beam is reduced, and the beam cannot be used in the display of laser TVs.

Method used

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  • Method for eliminating laser display speckles and laser source
  • Method for eliminating laser display speckles and laser source
  • Method for eliminating laser display speckles and laser source

Examples

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Embodiment 1

[0027] Such as figure 1 As shown, this embodiment provides a method for eliminating laser display speckle, including:

[0028] S101, arranging a plurality of laser emission sources 2 with the same light emitting direction in the form of an array, forming a figure 2 The laser emitter array 3 is shown.

[0029] S102. Repeatedly select several laser emission sources 2 in the laser emission array 3 to emit light at equal time intervals until the laser generated by the laser emission array 3 shows that the speckles are eliminated.

[0030] Preferably, the selected number of laser emitting sources 2 is a preset value, and the preset value is preferably determined according to the intensity of laser light emitted by the laser emitting array 3 . In addition, the laser emitting sources 2 selected each time are not completely the same. For example, assuming that the laser emission array 3 has a total of 16 laser emission sources 2, according to the pre-emitted laser light intensity,...

Embodiment 2

[0035] This embodiment provides a laser light source, including several such as figure 2 The laser emitter array 3 is shown.

[0036] Preferably, multiple laser emission sources 2 are evenly distributed on the laser emission array 3 . The laser emitting source 2 is preferably a red laser diode, a green laser diode or a blue laser diode. Correspondingly, the wavelengths of the laser diodes are 671nm, 532nm, and 473nm; the powers are 3.5W, 0.32W, and 1.3W;

[0037] The laser light source provided in this embodiment selects the laser emitting source in the laser emitting array 3 by applying the method of the first embodiment, changes the coherence of the laser beam, and finally effectively eliminates the speckle.

[0038] In summary, the present invention provides a method and a laser light source for eliminating laser display speckles. Among them, the method uses multiple laser diodes in the laser emitting array to emit light in turn, and under the condition that the total l...

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Abstract

The invention relates to the technical field of laser display and discloses a method for eliminating laser display speckles and a laser source. The method comprises steps of: arranging multiple laser emission sources in an array, wherein the multiple laser emission sources have the same light emission direction and form a laser emission array; repeatedly enabling, at equal time intervals, a plurality of laser emission sources in the laser emission array to emit laser until the laser display speckles generated by the laser emission array are eliminated, wherein the number of the selected laser emission sources is a preset value, and the number of the selected laser emission sources at each time is not completely same. The method enables multiple laser emission sources in the laser emission array to emit laser in turns so as to eliminate the time coherence of the laser emission sources and continuously superpose the dynamic speckles, thereby gradually reducing the contrast of the speckles and finally eliminating the speckles. In addition, other optical devices are not arranged in an optical path so that the utilization rate of optical energy is increased and laser display quality is improved.

Description

technical field [0001] The invention relates to the technical field of laser display, in particular to a method for eliminating laser display speckles and a laser light source. Background technique [0002] Laser display uses lasers with three wavelengths of red, green, and blue as light sources. Compared with traditional display technologies, it has the advantages of large color gamut display, high color saturation, flexible and variable display screen size, and no harmful electromagnetic radiation. However, there is a problem of uneven imaging in laser display, and the uneven brightness on the screen seriously hinders the imaging quality of laser display. The factor of imaging inhomogeneity is mainly due to the fact that when a beam of parallel laser irradiates a rough plane, each point on the surface will scatter light to space, and the amplitude and phase of these lights are randomly distributed. The elementary light waves from each small-area element on the rough surfa...

Claims

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Application Information

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IPC IPC(8): G02B27/48H01S5/40
CPCG02B27/48H01S5/4025
Inventor 尧舜成健王智勇邱运涛贾冠男雷宇鑫吕朝蕙
Owner BEIJING UNIV OF TECH
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