CN105301792A - Laser speckle inhibition method - Google Patents

Laser speckle inhibition method Download PDF

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CN105301792A
CN105301792A CN 201510689745 CN201510689745A CN105301792A CN 105301792 A CN105301792 A CN 105301792A CN 201510689745 CN201510689745 CN 201510689745 CN 201510689745 A CN201510689745 A CN 201510689745A CN 105301792 A CN105301792 A CN 105301792A
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laser
unit
array
luminance
group
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CN 201510689745
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Chinese (zh)
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尧舜
吕朝蕙
邱运涛
贾冠男
成健
罗校迎
王智勇
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北京工业大学
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Other optical systems; Other optical apparatus
    • G02B27/48Laser speckle optics; Speckle reduction arrangements

Abstract

The invention discloses a laser speckle inhibition method, and relates to the technical field of laser display. The method comprises that multiple laser units are arranged in an array form with the same light output direction to form an array laser source; multiple laser units are selected from the array laser source as a first laser unit group, and other laser units form a second laser unit group; the first laser unit group is changed from the first brightness to the second brightness and then to the first brightness; and when the first laser unit group reaches the second brightness, the second laser unit group is changed from the first brightness to the second brightness and then to the first brightness. According to the method, multiple separate laser units emit light alternatively, the difference of the amplitude of adjacent laser units is large, the contrast of speckles gradually reduces, and the speckles are eliminated finally.

Description

一种抑制激光散斑的方法 A method of inhibiting method of laser speckle

技术领域 FIELD

[0001] 本发明涉及激光显示技术领域,尤其涉及一种抑制激光散斑的方法。 [0001] The present invention relates to a laser display technology, and particularly relates to a method for inhibiting laser speckle.

背景技术 Background technique

[0002] 近年来人们对视频显示的画面要求不断提高,不断追求画面的细腻与艳丽,这就要求显示设备能呈现色彩更为丰富的图像。 [0002] In recent years, people screen video display requirements continue to increase, the constant pursuit of delicate and gorgeous screen, which requires the display device can present a more colorful image. 在众多显示设备的光源中,激光因其具有单色性好、方向性高和亮度高等优点被广泛的作为显示设备的光源。 In many display light source apparatus, the laser light having a good color due to its high brightness and directionality advantages display apparatus is widely used as a light source. 激光的光谱线为线谱线,色彩分辨率高,色饱和度高,能够显示非常清晰而且鲜艳的颜色。 Spectral line of the laser is a line spectrum, high color resolution, color saturation, and is able to display very clear bright colors. 激光可供选择的谱线很多,从400nm到700nm都有较成熟的激光器,这样可以形成大色域色度三角形,从而能够最贴近人眼的色域感知区域。 Many alternative laser line, from 400nm to 700nm are more mature laser, which can form a large triangular chromaticity gamut, the color gamut can be closest to the human eye detection area. 同时,激光显示技术还具有寿命长,无有害电磁射线辐射等优势因此受到了越来越多的关注。 At the same time, the laser display technology also has a long life, no harmful electromagnetic rays and other advantages and therefore has attracted more and more attention.

[0003] 然而,在激光显示的屏幕上我们除了可以看见显示的图像外,还能看到许多明暗相间的、颗粒状的散斑。 [0003] However, in the laser display on the screen we can see the image displayed in addition to the outside, you can still see a lot of light and dark, granular speckle. 散斑的产生是由于激光在空间当中某一位置也就是屏幕的相干叠加,由多个相位随机的光波长复振幅相加而成的。 Since the laser speckle is a position that is superimposed on the spatial coherence of the screen among a plurality of optical wavelength multiplexing random phase obtained by adding the amplitude. 由于这些散斑的颗粒状分布导致图像信息内容部分缺失,降低图像的分辨率,严重的影响激光显示的观看质量。 Because of these granular speckle image information content distribution results in partial deletion, reducing the resolution of the image, serious impact on laser display viewing quality. 只有将散斑对比度抑制到4%以下,人眼才无法分辨散斑。 Only speckle contrast is suppressed to 4% or less, before the human eye can not distinguish speckle.

[0004] 现有技术中抑制散斑的方法有多种,如旋转光纤法、控制激光谐振腔法、震动屏幕法、多光纤分束法、超声光栅消散斑、通过转动相位板进行相位调制抑制散斑等,但现有的方法在激光光束出射之后需经过消相干元件的处理,使得光能利用率大大受损,降低了光束的质量,很难应用在激光电视的显示中。 [0004] The prior art method of reducing speckle in a variety, such as optical rotation method, a method for controlling the laser resonator, the vibration screen method, multi-fiber beam method, spot ultrasonic grating dissipation, is phase-modulated by rotating the phase plate inhibition speckle, etc., but the conventional method after exiting the laser beam subject to decoherence process element, so that light efficiency is greatly impaired, reducing the quality of the beam, the display is difficult to apply the laser TV.

发明内容 SUMMARY

[0005] 本发明要解决的技术问题是:如何在保证光束质量的前提下有效抑制散斑的问题。 [0005] The present invention to solve the technical problem is: how to effectively suppress speckle problem in ensuring the beam quality of the premise.

[0006] 为实现上述的发明目的,本发明提供了一种抑制激光散斑的方法包括: [0006] To achieve the above object of the present invention, the present invention provides a method of inhibiting the laser speckle comprising:

[0007] 使多个激光单元以阵列的形式排布,且出光方向相同形成阵列激光光源; [0007] plurality of laser units are arranged in an array, and the array laser light source is formed in the same direction;

[0008] 选取所述阵列激光光源中若干个激光单元为第一激光单元组,其余的激光单元为第二激光单元组; [0008] Select the array laser light source unit is a plurality of laser light of the first laser unit group, the rest of the laser unit of the second laser unit is set;

[0009] 控制所述第一激光单元组由第一亮度变化至第二亮度,再变化为第一亮度;在所述第一激光单元组达到第二亮度时,控制所述第二激光单元组由第一亮度变化至第二亮度,再变化为第一亮度; [0009] The first laser unit controlling the group consisting of a first luminance to a second luminance change, then changed to a first luminance; when the first laser unit reaches a second set of luminance, said second laser control unit group changed from a first luminance to a second luminance, then changed to a first luminance;

[0010] 其中,所述第一激光单元组与第二激光单元组变化的周期相同; [0010] wherein said first laser unit is the same group and a second group of laser units change period;

[0011] 所述第一激光单元组的激光单元个数与第二激光单元组的激光单元个数相同或相差一个。 [0011] The laser unit of the laser unit group number of the same number of the first laser unit and the laser unit or a second group of a phase difference.

[0012] 其中较优地,所述第一激光单元组以及第二激光单元组由第一亮度变化至第二亮度再第二亮度变化至第一亮度,是均匀变化的。 [0012] wherein Jiaoyou, the first laser and the second laser unit cell group the group consisting of a first luminance to a second luminance change and then a second luminance to the first luminance change, change is uniform.

[0013] 其中较优地,所述选取所述阵列激光光源中若干个激光单元为第一激光单元组,是按所述阵列激光光源中每列激光单元的排列顺序间隔选取的。 [0013] wherein Jiaoyou, said selecting said plurality of array laser light source is a laser laser unit cell groups, a laser light source array according to the order in which each column in the selected interval of the laser unit.

[0014] 其中较优地,所述选取所述阵列激光光源中的若干个激光单元发光步骤中,所述阵列激光光源中若干个激光单元,是通过变化的电信号来控制的。 [0014] wherein Jiaoyou, said array of said selected plurality of laser light sources emitting laser unit step, the array laser light source a plurality of laser unit, by varying the electrical signal is controlled.

[0015] 其中较优地,所述控制所述第一激光单元组以及第一激光单元组的变化,是通过形式为三角脉冲的电信号控制的; [0015] wherein Jiaoyou, the control unit sets the first laser and the variation of the laser unit of the first group, in the form of triangular pulses by controlling the electrical signal;

[0016] 其中,所述三角脉冲的脉冲幅度为5A,脉冲宽度为8ms,脉冲上升时间与下降时间均为4ms。 [0016] wherein the pulse amplitude of the triangular pulse. 5A, the pulse width of 8ms, the pulse rise time and the fall time are 4ms.

[0017] 其中较优地,所述使多个激光单元以阵列的形式排布,是使多个激光单元以阵列的均匀排布的。 [0017] wherein Jiaoyou, said plurality of laser units are arranged in an array, a plurality of laser units arranged in a uniform array. 本发明提供了一种抑制激光散斑的方法。 The present invention provides a method of inhibiting laser speckle. 其中,该方法在保证总光强不变的情况下通过阵列激光光源中的多个激光单元明暗交替发光,使相邻激光单元间振幅相差悬殊,使散斑的对比度逐渐降低,最终消除散斑。 Wherein, in a case where the process to ensure that the total light intensity constant by the plurality of laser units in the array of alternating light and dark laser light source emitting the laser light between amplitude differences between adjacent cells, the contrast of speckle is gradually decreased and eventually eliminate speckle . 此外,该方法在激光光束射出之后并未通过光学元件进行处理,因此有效的保证了光束的质量,可应用于激光电视的显示中。 Furthermore, the method is not carried out after the laser beam emitted by the optical processing element, thus effectively ensuring the quality of the beam, the laser may be applied to the TV display.

附图说明 BRIEF DESCRIPTION

[0018] 通过阅读下文优选实施方式的详细描述,各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。 [0018] By reading the following detailed description of preferred embodiments Hereinafter, a variety of other advantages and benefits to those of ordinary skill in the art will become apparent. 附图仅用于示出优选实施方式的目的,而并不认为是对本发明的限制。 The drawings are only for purposes of illustrating a preferred embodiment and are not to be considered limiting of the present invention. 而且在整个附图中,用相同的参考符号表示相同的部件。 But throughout the drawings, like parts with the same reference symbols. 在附图中: In the drawings:

[0019]图1是本发明第一实施例提供的抑制激光散斑方法流程图; [0019] FIG. 1 is a first embodiment of the present invention, a flowchart of a method of laser speckle suppression;

[0020]图2是本发明第一实施例提供的矩形脉冲信号示意图; [0020] FIG. 2 is a schematic view of a rectangular pulse signal according to a first embodiment of the present invention;

[0021] 图3是本发明第一实施例提供的一种阵列激光光源示意图; [0021] FIG. 3 is a schematic diagram of a laser light source array according to a first embodiment of the present invention;

[0022] 图4是本发明第一实施例提供的另一种阵列激光光源示意图; [0022] FIG. 4 is a schematic diagram of another laser light source array according to a first embodiment of the present invention;

[0023]图5是本发明第二实施例提供的一种应用在一种激光电视上的抑制激光散斑的方法示意图; [0023] FIG. 5 is a schematic view of a second embodiment of an application of the present invention provided on a method of inhibiting A laser TV laser speckle;

[0024]图6是本发明第二实施例提供的另一种应用在一种激光电视上的抑制激光散斑的方法示意图. [0024] FIG. 6 is a second embodiment of the present invention to provide an alternative to a laser television application in the method of laser speckle suppression schematic.

具体实施方式 detailed description

[0025] 下面结合附图和实施例,对本发明的具体实施方式作进一步详细描述。 [0025] The following embodiments and the accompanying drawings, specific embodiments of the present invention will be further described in detail. 以下实施例用于说明本发明,但不用来限制本发明的范围。 The following examples serve to illustrate the present invention but are not intended to limit the scope of the present invention.

[0026] 实施例一 [0026] Example a

[0027] 本实施例提供了一种抑制激光散斑的方法,包括: [0027] The present embodiment provides a method for inhibiting laser speckle, comprising:

[0028] S101、使多个激光单元以阵列的形式排布,且出光方向相同形成阵列激光光源; [0028] S101, a plurality of laser units are arranged in an array, and the array laser light source is formed in the same direction;

[0029] 其中较优地,多个激光单元是均匀分布在阵列激光光源上的。 [0029] wherein Jiaoyou, a plurality of laser units are evenly distributed over the array laser light source. 激光单元优选采用红色激光二极管、绿色激光二极管或蓝色激光二极管。 The laser diode unit is preferably used a red laser, a green laser diode or a blue laser diode. 对应地,激光二极管的波长分别为671nm、532nm、473nm ;功率分别为3.5W、0.32W、1.3W。 Correspondingly, the wavelength of the laser diode are 671nm, 532nm, 473nm; are power 3.5W, 0.32W, 1.3W.

[0030] S102、选取阵列激光光源中若干个激光单元为第一激光单元组,其余的激光单元为第二激光单元组。 [0030] S102, select the array laser light source unit is a plurality of laser light of the first laser unit group, the rest of the laser unit to the second laser unit group. 其中,第一激光单元组的激光单元个数与第二激光单元组的激光单元个数相同或相差一个,以此保证激光阵列总输出功率恒定。 Wherein the number of the same number of laser unit and laser unit of the laser unit of the second group of the first laser unit or a difference of one group, in order to ensure a constant total output power of the laser array.

[0031] 为了更清楚的理解本实施例提供的方法,下面对如何选取进行举例说明。 [0031] For a more clear understanding of the method provided by the embodiment, how to select the following be exemplified.

[0032] 图2示出了阵列激光光源中每一列包含偶数个激光单元的一种排列形式。 [0032] FIG 2 illustrates a laser light source are arranged in an array and each column contains an even number of laser units. 其中,阵列激光光源每一列中分布了四个激光单元。 Wherein each column of the array laser light source distribution of the four laser unit. 以阵列激光光源中的第一列为例:按激光单元排列由上至下的顺序,选取排序为第奇数个的激光单元(第一个激光单元11、第三个激光单元13)为第一激光单元组,其余的激光单元(第二个激光单元12、第四个激光单元14)为第二激光单元组。 In the first column of the array laser light source as an example: a laser unit according to the order from top to bottom, the odd-numbered order of selection of the laser unit (a first laser unit 11, the third laser unit 13) as a first laser unit group, the rest of the laser unit (second laser unit 12, a fourth laser unit 14) to set the second laser unit. 同样地,阵列激光光源中的其他列也依此方法进行选取。 Similarly, the other columns in the array laser light source is also selected based on such methods.

[0033] 显然的是,在图2所示的这种情况中,选取得到的第一激光单元组和第二激光单元组所包含的激光光源的个数是相同的。 [0033] Clearly, in the case shown in Figure 2, the number of the laser light source a first laser and the second laser unit group selected cell group obtained contained the same.

[0034] 图3示出了阵列激光光源中每一列包含奇数个激光单元的一种排列形式。 [0034] FIG. 3 shows an array of laser light sources arranged in each column comprise one laser unit forms an odd number. 其中,阵列激光光源每一列中分布了五个激光单元。 Wherein each column of the array laser light source distribution of the five laser unit. 从阵列激光光源中的第一列开始选取:按激光单元排列由上至下的顺序,选取排序为第奇数个的激光单元(第一个激光单元21、第三个激光单元23、第五个激光单元25)为第一激光单元组,其余的激光单元(第二个激光单元12、第四个激光单元14)为第二激光单元组。 From the first column of the array laser light source begins selected: a laser unit according to the order from top to bottom, the odd-numbered order of selection of the laser unit (a first laser unit 21, the third laser unit 23, the fifth the laser unit 25) is a laser unit the first group, the rest of the laser unit (second laser unit 12, a fourth laser unit 14) to set the second laser unit. 接着,在第二列中,按激光单元排列由下至上的顺序,选取排序为第偶数个的激光单元(第七个激光单元27等)为第一激光单元组,其余的激光单元(第六个激光单元26等)为第二激光单元组。 Next, in the second column, by the laser unit is arranged in the order from the bottom, even-numbered order of selection of the laser unit (seventh laser unit 27, etc.) of a laser unit of the first group, the rest of the laser unit (VI a laser unit 26, etc.) to a second group of laser units.

[0035] 显然的是,在图3所示的这种情况中,选取得到的第一激光单元组和第二激光单元组所包含的激光光源的个数是相差一个的。 [0035] Clearly, in the case shown in FIG. 3, the number of the laser light source a first laser and the second laser unit group selected cell group obtained difference is included in a.

[0036] 当然可以理解,本发明的选取方法不仅限于上述叙述的两种,只要选取的结果使每一个激光单元与相邻的激光单元不在同一组即可,实现了第一激光单元组和第二激光单元组的交替排列。 [0036] It will be appreciated, of course, to select the method of the present invention is not limited to the two kinds described above, by selecting the result that each group can be the same laser unit with adjacent laser unit does not achieve the first laser and the second cell group alternately arranged two groups of the laser unit.

[0037] S103、控制第一激光单元组由第一亮度变化至第二亮度,再变化为第一亮度;在第一激光单元组达到第二亮度时,控制第二激光单元组由第一亮度变化至第二亮度,再变化为第一亮度。 [0037] S103, the control unit of the first laser light from the first set to a second luminance luminance change, then changed to a first luminance; set when the first laser unit reaches a second luminance, the second laser unit controlling the first brightness group consisting of change to a second luminance, then a first luminance variation.

[0038] 其中,第一激光单元组与第二激光单元组变化的周期相同。 [0038] wherein, similar to the first laser and the second laser unit cell group set period changes. 优选地,第一激光单元组与第二激光单元组的变化通过电流控制的。 Change Preferably, the first laser unit and the laser unit group set by the second current control. 如图4所示,控制变化的电流为三角脉冲式电流,脉冲幅度为5A,脉冲上升时间与下降时间均为4ms,脉冲宽度为8ms。 4, the change of the control current is a triangular pulse current, pulse amplitude. 5A, the pulse rise time and fall time are 4ms, the pulse width of 8ms. 为了更好的理解本发明,下面将举例说明如何控制第一激光单元组与第二激光单元组变化:在0-4ms内,通过电流控制第一激光单元组的亮度逐渐增大,由第一亮度变化为第二亮度。 For a better understanding of the present invention, it will be exemplified below how to control the first laser and the second laser unit cell group set changes: in the 0-4ms, gradually increasing the laser current controlling luminance of the first group unit, the first luminance change to a second luminance. 其中较优地,第一亮度为不发光的亮度,第二亮度为最大的发光亮度。 Wherein Jiaoyou, the first non-emission luminance of the luminance, the second luminance is the maximum emission luminance. 在第4ms时第一激光单元组达到第二亮度,此时开始控制第二激光单元组。 In the first set of 4ms a first laser unit reaches a second luminance, when the laser control unit starts the second group. 在4-8ms内,通过电流控制第一激光单元组的亮度逐渐减小,由第二亮度变化为第一亮度。 Within the 4-8ms, gradually decreases the luminance of the laser by the current control unit of the first group, the second intensity change as a first luminance. 第二激光单元组在电流的控制下亮度逐渐增大,由第一亮度变化为第二亮度。 The second laser unit sets the luminance is gradually increased under the control current from the first luminance to a second luminance variation. 在之后的周期内控制方法以此类推,为节约篇幅在此就不再 After a control period in the method so as to save space this will not

赘述了。 Repeat.

[0039] 通过上述第一激光单元组与第二激光单元组明暗交替逐渐变化的控制方法,使相邻激光单元间的振幅相差悬殊,使干涉条纹明暗区分甚微,减少了光束之间的干涉现象,使散斑对比度逐渐降低。 [0039] The laser unit via the first group and the second group of alternating light and dark laser unit controlling method of gradually changing the amplitude between adjacent laser unit differences between the light and dark interference fringes distinguish little, reducing the interference between the beams phenomenon, the speckle contrast decreases. 当低于4%以下,人眼就察觉不到散斑的存在了,从而可以有效的抑制显示散斑的形成。 When less than 4% or less, the human eye can not perceive the existence of the speckle, which can effectively inhibit the formation of speckle display.

[0040] 实施例二 [0040] Second Embodiment

[0041] 本实施例提供了一种应用在一种激光电视上的抑制激光散斑的方法。 [0041] The present embodiment provides a method for inhibiting laser speckle on an application to a laser television. 如图5所示,阵列激光光源为红光阵列激光光源101、绿光阵列激光光源102以及蓝光阵列激光光源103。 5, the array laser light source is a laser light source 101 array of red, green 102, and blue laser light source array laser light source array 103. 通过实施例一的方法使红光阵列激光光源101、绿光阵列激光光源102以及蓝光阵列激光光源103射出激光的散斑得到了抑制。 Example of a method of making an array of red laser light source 101 through the embodiment, the green laser light source 102 and an array of speckles blue laser light source 103 for emitting laser array has been suppressed. 经过调制解调器2等一系列处理,激光射在激光电视显示屏3上,由于射入的激光形成的散斑得到了有效抑制,因此激光电视显示屏3将无法看见散斑,从而提升了显示效果。 After a series of processing modem 2 and the like, a laser emitting the laser 3 on the TV screen, the laser speckle pattern formed incident been effectively suppressed, whereby the laser light 3 will not see the TV screen speckle, thereby improving the display effect.

[0042] 实施例三 [0042] Example three

[0043] 本实施例提供了一种应用在另一种激光电视上的抑制激光散斑的方法。 [0043] The present embodiment provides a method for inhibiting a laser speckle in another application of laser television. 如图6所示,阵列激光光源1为红光阵列激光光源、绿光阵列激光光源或蓝光阵列激光光源。 6, the array laser light source 1 is a laser light source array of red, green or blue laser light source arrays array laser source. 通过实施例一的方法使阵列激光光源1射出激光的散斑得到了抑制。 A laser light source so that the array by the method of Example 1 emits a laser speckle suppressed. 经过用于生成RGB三种颜色的晶体或光导4,激光射在激光电视显示屏3上,由于射入的激光形成的散斑得到了有效抑制,因此激光电视显示屏3将无法看见散斑,从而提升了显示效果。 After three colors of RGB used to generate the light guide 4 or the crystals, the laser beam emitted laser television display screen 3, since the laser speckle formation incident been effectively suppressed, whereby the laser light 3 will not see the TV screen speckle, so as to enhance the display.

[0044] 综上所述,本发明提供了一种抑制激光散斑的方法。 [0044] In summary, the present invention provides a method of inhibiting laser speckle. 其中,该方法通过上述第一激光单元组与第二激光单元组明暗交替逐渐变化的控制方法,使相邻激光单元间的振幅相差悬殊,使干涉条纹明暗区分甚微,减少了光束之间的干涉现象,使散斑对比度逐渐降低,最终消除散斑。 Wherein said laser unit by which a first group and the second group of alternating light and dark laser unit controlling method of gradually changing the amplitude between adjacent laser unit differences between the light and dark interference fringes little distinction, between the light beams is reduced interference phenomena, the speckle contrast gradually reduce and eventually eliminate speckle. 同时,由于第一激光单元组与第二激光单元组包含的激光单元个数相同或相差一个,保证了整个激光光源总功率的稳定。 Meanwhile, since the same number of cells of the first laser and the second laser unit set of laser unit or phase comprising a group to ensure the stability of the entire total power of a laser light source. 此外,本发明从光源的角度出发,并未在光路上增设任何光学元件,因此提高了光能的利用率,也提升了激光显示质量。 Further, from the perspective of the present invention, the light source, the optical path is not any additional optical elements, thus improving the utilization of solar energy, but also to enhance the quality of the laser display.

[0045] 以上实施方式仅用于说明本发明,而并非对本发明的限制,有关技术领域的普通技术人员,在不脱离本发明的精神和范围的情况下,还可以做出各种变化和变型,因此所有等同的技术方案也属于本发明的范畴,本发明的专利保护范围应由权利要求限定。 [0045] The above embodiments are merely illustrative of the present invention, and are not restrictive of the invention, relating to ordinary skill in the art, without departing from the spirit and scope of the present invention, can make various changes and modifications , all equivalent technical solutions also within the scope of the present invention, the scope of the present invention patent is defined by the appended claims.

Claims (6)

  1. 1.一种抑制激光散斑的方法,其特征在于,包括: 使多个激光单元以阵列的形式排布,且出光方向相同形成阵列激光光源; 选取所述阵列激光光源中若干个激光单元为第一激光单元组,其余的激光单元为第二激光单元组; 控制所述第一激光单元组由第一亮度变化至第二亮度,再变化为第一亮度;在所述第一激光单元组达到第二亮度时,控制所述第二激光单元组由第一亮度变化至第二亮度,再变化为第一亮度; 其中,所述第一激光单元组与第二激光单元组变化的周期相同; 所述第一激光单元组的激光单元个数与第二激光单元组的激光单元个数相同或相差一个。 1. A method for inhibiting laser speckle, which is characterized in that, comprising: a plurality of laser units are arranged in an array, and the array laser light source is formed the same direction; selecting a plurality of the array laser light source unit is a laser the first group of the laser unit, the laser unit to the rest of the second set of laser unit; said first laser unit controlling the group consisting of a first luminance to a second luminance change, then changed to a first luminance; laser unit in the first group upon reaching the second luminance, the second laser unit controlling the group consisting of a first luminance to a second luminance change, then changed to a first luminance; wherein said first laser unit is the same group and a second group of laser units varying period ; the laser unit of the laser unit group number of the same number of the first laser unit and the laser unit or a second group of a phase difference.
  2. 2.如权利要求1所述的抑制激光散斑的方法,其特征在于,所述第一激光单元组以及第二激光单元组由第一亮度变化至第二亮度再第二亮度变化至第一亮度,是均匀变化的。 2. The method according to suppress laser speckle claimed in claim 1, wherein the first laser and the second laser unit cell group the group consisting of a first luminance to a second luminance change and then the second to the first luminance variation brightness, uniform changes.
  3. 3.如权利要求1所述的抑制激光散斑的方法,其特征在于,所述选取所述阵列激光光源中若干个激光单元为第一激光单元组,是按所述阵列激光光源中每列激光单元的排列顺序间隔选取的。 3. A method of inhibiting the speckle claimed in claim 1, wherein said selecting said plurality of array laser light source is a laser unit sets a first laser unit, the laser light source is according to the array for each column the order of the selected laser unit interval.
  4. 4.如权利要求1所述的抑制激光散斑的方法,其特征在于,所述选取所述阵列激光光源中的若干个激光单元发光步骤中,所述阵列激光光源中若干个激光单元,是通过变化的电信号来控制的。 4. A method of inhibiting the speckle claimed in claim 1, wherein said selecting of said array laser light source unit emitting a plurality of laser step, the array laser light source a plurality of laser units is by varying electrical signal to control.
  5. 5.如权利要求1所述的消除激光显示散斑的方法,其特征在于,所述控制所述第一激光单元组以及第一激光单元组的变化,是通过形式为三角脉冲的电信号控制的; 其中,所述三角脉冲的脉冲幅度为5A,脉冲宽度为8ms,脉冲上升时间与下降时间均为4ms ο 5. The electrical control to eliminate the laser speckle display method as claimed in claim, wherein said control unit sets the first laser and the first variation of the laser unit group, is in the form of a triangular pulse ; and wherein the pulse amplitude of the triangular pulse. 5A, the pulse width of 8ms, the pulse rise time and fall times are 4ms ο
  6. 6.如权利要求5所述的激光光源,其特征在于,所述使多个激光单元以阵列的形式排布,是使多个激光单元以阵列的均匀排布的。 A laser light source according to claim 5, wherein said plurality of laser units are arranged in an array, a plurality of laser units arranged in a uniform array.
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Publication number Priority date Publication date Assignee Title
US6577429B1 (en) * 2002-01-15 2003-06-10 Eastman Kodak Company Laser projection display system
CN101263421A (en) * 2005-09-14 2008-09-10 松下电器产业株式会社 Image forming device
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