CN1491030A - Tricolour convergent method for matrix pixel device projector scope - Google Patents

Tricolour convergent method for matrix pixel device projector scope Download PDF

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CN1491030A
CN1491030A CNA031293131A CN03129313A CN1491030A CN 1491030 A CN1491030 A CN 1491030A CN A031293131 A CNA031293131 A CN A031293131A CN 03129313 A CN03129313 A CN 03129313A CN 1491030 A CN1491030 A CN 1491030A
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image
matrix
color
convergence
display device
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CN1234237C (en
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旭 刘
刘旭
邱胜根
刘向东
李海峰
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浙江大学
杭州浙大科特光电科技有限公司
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Abstract

This invention opens a three colors convergence method for projecting display of matrix pixel device. The matrix pixel device produces the picture that is projected into the screen, multi image sensors on the screen according to certain rules are mount, the image sensor collects the image data and sends to computers, after processing the image evaluation function is used to judge whether or not the precision of convergence reaches the requirement, if reaches it, then the convergence ends, and enters the three display chip fast curing exposure process, if doní»t reach precision of requirement , then synthetize multi sensors data to calculate deviation value, through six degree of freedom precise manipulator control matrix pixel device to move to the required place, above the procedure is repeated until the convergence reaches the precision. In this invention, not only the convergence speed is faster than manual work, also the convergence precision and reliability are improved efficiently, and the automation of three colors convergence is implemented.

Description

矩阵像素器件投影显示器的三色会聚方法 The method of converging three color projection display device pixel matrix

技术领域 FIELD

本发明涉及一种矩阵像素器件投影显示器的三色会聚方法。 The present invention relates to a method of converging the three-color projection display device pixel matrix.

背景技术 Background technique

矩阵像素器件的大屏幕投影显示系统是当今办公、会议等的主要显示技术。 Large-screen projection matrix pixel devices display system is a major display technology in today's office, meetings, etc. 液晶投影电视、DLP投影以及LCOS投影显示器等就是这种技术的典型代表,是下一代高清晰度电视的主要显示器件,是目前CRT显示器的替代产品,它具有矩阵式象素器件的高分辨,同时具有无辐射,无闪烁,数字化等优点。 LCD projection television, DLP and LCOS projectors and other projection display is a typical representative of this technology is the next generation HDTV main display device is a CRT display alternative, the pixels having a high resolution matrix device, while having no radiation, no flicker, digital advantages.

在这些投影显示系统中,彩色图像是应用三块矩阵像素器件(如液晶板或DMD,LCOS)分别调制红绿蓝三色光路,再将三色光路合成为彩色图像,投影至屏幕,形成彩色图像。 In these projection display systems, color images are applied three matrix pixel devices (such as a liquid crystal panel or DMD, LCOS) are red, green and blue light modulation path, then the three color light path synthesizing a color image projected onto the screen to form a color image. 由于矩阵像素器件的每个像素尺寸较小(一般在10-20微米),因此红(R)、绿(G)、蓝(B)三色矩阵像素器件的精确会聚成为生产与应用这些显示系统的关键技术。 Due to the small size of the matrix of pixels each pixel of the device (typically 10-20 microns), and therefore the red (R), green (G), blue (B) condensing accurate three-color pixel matrix production and application of the device becomes these display systems the key technologies. 目前,基本上还是靠人工来调节三色矩阵像素器件的会聚,因此主观性较大,而且费时、费力,品质难以控制。 At present, basically rely on manual adjusting device converging three-color pixel matrix, and therefore a greater subjective and time-consuming, laborious, difficult to control quality.

发明内容 SUMMARY

本发明的目的是提供了一种矩阵像素器件投影显示器的三色会聚方法。 Object of the present invention is to provide a method of converging three-color projection display device pixel matrix.

矩阵像素器件产生图像经光学系统投影于屏幕,在屏幕上按照一定的规则安装多个图像传感器,图像传感器采集投影于屏幕上的图像数据到计算机中,将数据进行图像处理之后运用评价函数,判别会聚精度是否达到要求,如果达到精度要求,则会聚过程结束,进入三个显示芯片的快速固化曝光过程,如果精度未达到要求,则综合多个传感器的数据计算出偏差量,由六自由度精密机械手控制矩阵像素器件运动到符合要求的位置,重复上述过程,直到会聚精度达到要求为止。 Matrix pixel device generating an image onto a screen via an optical system, mounting a plurality of image sensors in accordance with certain rules on the screen, the image projected on the image sensor to collect data on the screen into the computer, and then the data is subjected to image processing using the evaluation function, it is determined whether convergence required precision, accuracy is reached, then the process ends converging into three rapid solidification display chip during exposure, if the precision not meet the requirements, a plurality of sensor data is integrated to calculate the amount of deviation from the six degrees of freedom precision the robot control device to position the pixel matrix to meet the requirements of the above procedure is repeated until convergence is reached accuracy requirements.

本发明不仅三色会聚的速度较人工快,而且会聚的精度和可靠性都得到了有效的提高,实现了三色会聚的自动化。 Only three colors converge faster than manual speed of the present invention, and the convergence precision and reliability have been improved effectively, to achieve automation of three-color convergence.

附图说明 BRIEF DESCRIPTION

图1是三色自动会聚流程框图;图2是空间六自由度精密调整架与像素器件的固定示意图,图中像素器件a,六自由度机械手b;图3是屏幕上五个CCD的两种分布示意图; FIG. 1 is a block flow diagram of a three-color automated convergence; FIG. 2 is a schematic view of six-DOF fine adjustment of the fixed frame and the device space pixel, the pixel in FIG device a, six degrees of freedom robot B; FIG. 3 is a CCD of the two kinds of five on a screen distribution map;

图4是会聚系统的自动对焦调整过程示意图;图5是会聚系统的自动三色合色过程示意图。 FIG 4 is a schematic view of the autofocus system of adjustment of the convergence process; FIG. 5 is an automatic convergence system three-color color combiner process of FIG.

具体实施方式 Detailed ways

矩阵像素器件投影显示器是现代办公、家庭多媒体大屏幕投影电视、以及高清晰度电视的主要实现技术。 Matrix pixel projection display device is a modern office and home multimedia large-screen projection television, as well as the main technology to achieve high-definition TV. 这一类投影显示器的彩色图像是应用三块矩阵像素器件(如液晶板LCD或DMD,LCOS)分别调制红绿蓝三色光路,再将三色光路合成为彩色图像,投影至屏幕,形成彩色图像。 This type of color image projection display device is applied three pixel matrix (e.g., a liquid crystal panel LCD or DMD, LCOS) are red, green and blue light modulation path, then the three color light path synthesizing a color image projected onto the screen to form a color image. 由于矩阵像素器件的每个像素尺寸较小,一般在10-20微米,红(R)、绿(G)、蓝(B)三色矩阵像素器件的精确会聚成为生产与应用这些显示系统的关键技术。 Due to the small size of each pixel matrix pixel devices, typically 10-20 microns, accurate convergence of red (R), green (G), blue (B) three-color matrix pixel device as the key production and application of these display systems technology.

因此存在必须将三色像素显示器(如液晶板)进行空间方位的三色会聚重合问题。 So there must be three color pixels of the display (liquid crystal panel) spatial orientation converging three colors overlap problem. 由于高分辨的矩阵像素器件每个像素的大小仅有8-20微米左右,三色会聚是一个十分精密与细致的工作,包括会聚的判断,三块矩阵像素器件的调整,目前也只有靠人眼判读,完全是一种劳动密集的技术,而且由于人为因素的影响,矩阵像素器件投影机的生产品质稳定性难以保证,是一个难度较大的生产关键工艺,其效率高低直接影响投影显示器的生产率。 Since only about 8-20 microns in size of each pixel of the pixel matrix of high-resolution devices, a three-color convergence is very precise and meticulous work, including convergence determination, adjusting three matrix pixel devices, is also only by people eye interpretation, a completely labor intensive technique, the quality of production and because of the stability of human factors, the projector matrix pixel device is difficult to guarantee, is a difficult manufacturing process of the key, which will directly affect the efficiency of the projection display productivity.

本发明中提出的矩阵像素器件投影显示器的三色会聚方法,是一种应用多个CCD进行图像采集,采用高速图像处理技术,判别会聚效果,由计算机控制三套精密空间六自由度机械手,调整三色矩阵像素器件的空间位置,实现空间的三色图像自动会聚。 The method of converging three color projection display matrix pixel device of the present invention proposed in the application is a plurality of CCD image acquisition, high-speed image processing technology, it is determined converging effect, a space defined by three precision computer controlled robot six degrees of freedom, to adjust the spatial position of three-color pixel matrix devices, the spatial three-color image is automatically converged. 具体系统框图如图1所示。 DETAILED system block diagram shown in Figure 1.

三块分别调制三色图像的矩阵像素器件(如LCD板,或LCOS,DMD)分别由三个独立的可以进行空间六自由度调节的机械手固定,该六自由度运动的机械手可以由三个精密平动台与三个精密转动台组合而成,构成空间相互正交的六自由度空间运动台,而且每一自由度的最小调节精度应该达到像素器件每个像素尺寸的1/10以内,以保证会聚精度。 Three modulation matrix pixel devices are three-color image (e.g., LCD panel, or LCOS, DMD) are regulated by three independent space can be secured six degrees of freedom of the manipulator, the six degrees of freedom of the robot may consist of three precision translation stage in combination with the precision turntable from three, six degrees of freedom of spatial movement orthogonal spatial configuration table, and each degree of freedom of adjustment accuracy should reach the minimum pixel size within each pixel devices 1/10 to guarantee convergence accuracy. 如图2所示,为三色图像矩阵像素显示器件之一的矩阵像素显示器件与六自由度机械手的位置关系。 As shown, the pixel matrix display device of one of the three-color pixel matrix image display device with the six degrees of freedom of positional relationship between the robot 2.

采用与投影显示器相同或类似的合色光学系统,将三个分别调制三种颜色光的矩阵像素器件以及与之相配套的三套六自由度机械手,构成一个完整的投影系统,并配合以投影物镜,将三色经三个矩阵像素器件调制的图像投影成像于屏幕。 The projection display using the same or similar color combination optical system, the three modulated light of three colors respectively matrix pixel device, and the matching of the three sets of six degrees of freedom manipulator, constituting a full projection system, and with the projection the objective lens, the three-color image projection by three matrix of pixels forming the screen of the modulating device. 在屏幕上,采用若干个CCD或CMOS图像传感器组成多通道图像传感器拍摄该系统投影在屏幕上的图像。 On the screen, using a plurality of CCD image sensors or CMOS image sensor takes the multi-channel system, the image projected on the screen. 图像传感器在屏幕上的排部有多种方式,其中典型的两种方式如图3所示,即采用五个CCD拍摄投影屏幕上的三色图像,每个CCD只能反映投影图像局部的性能,全局的投影图像性能要通过5个CCD综合完成。 On the screen of the image sensor of the discharge portion in various ways, with a typical two ways shown in Figure 3, i.e. using five three-color image captured by the CCD on the projection screen, each of the CCD image only reflect the projected partial performance , the global performance of the projection image to be performed by five integrated CCD. CCD在屏幕上应该有一定分布,如中心视场、边缘视场、0.7视场等,使得能够获得投影画面中心与边缘的图像会聚信息。 CCD on the screen should have a distribution, such as the center of the field of view, the edge of the field of view, other field of view 0.7, making it possible to obtain image information of the convergence of the center and edge of the projection screen. CCD摄取的投影画面五个区域的图像信号,经图像采集系统,进入计算机,转化为数字图像。 Five regional image signal picked CCD projection screen, the image acquisition system, into the computer, into a digital image.

为了进行计算机图像处理,判断出三色像素器件的空间位置差异,采用了高速图像处理与识别技术,通过建立图像的评价函数来衡量图像的清晰程度和图像的投影方位。 In order to perform image processing computer determines the spatial position of the three-color pixel difference device, using a high-speed image processing and recognition techniques to measure orientation of the projection image clarity and image evaluation function by creating an image. 三色会聚的过程分成两部分:第一部分是三色器件的自动对焦过程,第二部分是三色合色过程。 Three colors convergence process into two parts: The first part is the auto-focus process three-color device, the second part is a three color combiner process. 系统整体调整步骤为:CCD摄取图像,经过图像采集卡进入计算机,转化为数字图像,数字图像经过滤波、去噪、以及边缘增强等图像处理方法,进行图像算法变换,然后综合计算多个图像传感器检测的图像信息,计算评价函数,计算偏离量判别三色对焦或三色合色的效果,如果满足要求,则控制自动固化机,进行像素显示器件的曝光固化,如果不满足要求,则根据偏离量,应用多种优化技术,判别各色矩阵像素图像器件的位置与理想位置的差异,控制机械手进行六自由度调整,再用CCD摄取图像进入下一循环,如图1所示。 The step of adjusting the overall system: CCD image taken through image acquisition card into the computer, converted into a digital image, the digital image is subjected to filtering, denoising, edge enhancement and an image processing method, the image transform algorithm, and calculating a plurality of image sensor integrated the detected image information, calculates the evaluation function, calculates the amount of deviation determined effect tricolor focus or tri-color combiner if the requirements are met, the control automatic curing machine, exposure curing pixel of the display device, and if not required, then in accordance with the deviation amount , using a variety of optimization techniques, determining the ideal position of the position difference matrix pixel color image device, the control adjustment of six degrees of freedom manipulator, then CCD image taken into the next cycle, as shown in FIG.

第一部分为三色对焦过程,利用评价函数在正确对焦面上应该具有某些特征(比如函数具有极大值),一旦找到这个特征,就利用控制装置,调节某一器件,从而使得物象共轭,综合不同视场CCD的数据,可以将矩阵像素器件的投影图像综合效果最清晰。 The first part is a three-color-focus process, using the evaluation function at the correct focusing surface should have certain characteristics (such as functions having a maximum value), characterized in that once found, the control device, a regulating device, so that the physical image conjugate comprehensive data of different fields of view of the CCD, the projection image may be combined effect matrix pixel device clearest. 基本步骤如图4所示。 The basic steps as shown in FIG.

第二部分为三色图像合色过程,使红绿蓝三色图像投影于屏幕,利用不同方位采集的图像数据来实现三色在平面上重合。 The second portion is divided into three-color image color combiner process of the red, green and blue images onto a screen, to realize the three-color superposed on the image plane using the data collected in different directions. 基本步骤如图5所示。 The basic steps as shown in FIG.

三色对焦与三色合色两个过程可以对调次序,也可以多次循环使得达到较高的会聚精度。 Tricolor focus and three color combiner two processes may be reversed order, may be such that multiple cycles to achieve a high convergence accuracy.

同样,也可以采用将三色对焦与三色合色同时集中在一个调节反馈过程中进行的方法,实现同时的三色对焦与三色合色。 Similarly, a method may be employed with the three-color three color combiner focus while focusing on a process for adjusting feedback to achieve a simultaneous focus and three-color three color combiner.

由于投影镜头存在的一定的象差,如场曲、象散、慧差、倍率色差等,因此实际三色会聚的难度很大,给对焦面的判断、三色合色的结果判断带来较大的困难。 Due to the presence of some of the projection lens as a difference, such as field curvature, astigmatism, coma and chromatic aberration of magnification and the like, and therefore difficult to converge the actual three colors is large, the focal plane of the judgment to the three color combiner result of determination to bring greater Difficulties. 同时该设备的目标主要用于生产,要求自动调整速度快,因此在计算机处理中计算量也不能太大,否则会影响到自动会聚的速度。 And the target used in the production of the device, automatically adjusts the required speed, and therefore the amount of calculation can not be too large in a computer process, otherwise it will affect the auto-convergence speed. 为了更好的反映评价函数的特性,可以采用了多种算法。 In order to better reflect the characteristics of the evaluation function, you can use a variety of algorithms. 对于三色对焦过程,为了更好的反映评价函数的特性,可以采用了多种算法,如拉普拉斯算子、Sobel算子和Prewitt算子等,以提高图像判别精度。 For a three-color-focus process, in order to better reflect the characteristics of the evaluation function, a variety of algorithms may be employed, such as a Laplacian, Sobel operator and Prewitt operator, etc., to improve image discrimination accuracy. 同时,采用了多CCD对称分布图像摄取法,利用投影物镜的轴对称性等提高对焦判别的精度与速度。 Meanwhile, using multi-axial symmetry and symmetrically CCD image pickup method using a projection objective to improve the accuracy and speed of focus determination. 对于三色合色过程,可以采用三色位置渐次逼近的方法,也可以采用根据图像三色位置的计算差异,之间精密移动三色像素器件到理想位置的方法。 For a three color combiner process, the position of three color successive approximation method may be employed, according to the calculated difference image position three colors, three-color pixel precision between the mobile device to a desired position The method may also be employed. 经过多次循环,反馈机械手空间六自由度可调系统,控制机械手的空间运动,实现三色投影显示的完全会聚。 After several cycles, spatial feedback manipulator system adjustable six degrees of freedom, the robot motion control space, to achieve full convergence of three-color projection display.

三色会聚完成后,计算机控制紫外曝光系统进行快速紫外曝光,固化三色液晶板,同时应用多通道图像传感器实时监控屏幕上的图像变化,进而控制机械手快速反馈,校正曝光过程的图像变化。 After three colors converge complete, computer controlled UV exposure system for rapid UV exposure, the cured three-color liquid crystal panel, while applying the image change on the multi-channel image sensor real-time monitoring screen, thereby controlling the robot fast feedback correction image change the exposure process. 这样的监控反馈系统保证了紫外曝光的精度与成品率,实现三色矩阵像素器件的快速定位固化。 Such a feedback system to monitor the UV exposure to ensure accuracy and yield, fast positioning device of three-color pixel matrix cure.

Claims (9)

1.一种矩阵像素器件投影显示器的三色会聚方法,其特征在于矩阵像素器件产生图像经光学系统投影于屏幕,在屏幕上按照一定的规则安装多个图像传感器,图像传感器采集投影于屏幕上的图像数据到计算机中,将数据进行图像处理之后运用评价函数,判别会聚精度是否达到要求,如果达到精度要求,则会聚过程结束,进入三个显示芯片的快速固化曝光过程,如果精度未达到要求,则综合多个传感器的数据计算出偏差量,由六自由度精密机械手控制矩阵像素器件运动到符合要求的位置,重复上述过程,直到会聚精度达到要求为止。 1. A method of converging three-color pixel matrix projection display device, characterized in that the matrix pixel device generating an image onto a screen via an optical system, mounting a plurality of image sensors in accordance with certain rules on the screen, the image projected on the screen capture sensor after the image data to the computer, the data subjected to image processing using the evaluation function, it is determined whether the convergence accuracy requirements, accuracy is reached, then the process ends converging into three rapid solidification display chip during exposure, if the required accuracy is not reached data, the integration of a plurality of sensors to calculate the amount of deviation is controlled by the six degrees of freedom manipulator precision matrix pixel device is moved to a position to meet the requirements, the process is repeated until convergence until the required precision.
2.根据权利要求1所述的一种矩阵像素器件投影显示器的三色会聚方法,其特征在于所说的矩阵像素器件投影显示,是指LCD、DMD以及LCOS矩阵像素器件的投影显示。 The three-color pixel matrix method of condensing projection display device according to claim 1, wherein said projection display device of the pixel matrix, refers to a projection LCD, DMD and LCOS matrix pixel display device.
3.根据权利要求1所述的一种矩阵像素器件投影显示器的三色会聚方法,其特征在于所说的三色会聚过程,分为三色对焦与三色合色两个独立的过程,或者三色对焦和三色合色相结合的方法。 The three-color pixel matrix method of condensing projection display device according to claim 1, wherein said three color convergence process, is divided into three colors and three color combiner focus two independent processes, or tri the method of color hue focus bound and three color combiner.
4.根据权利要求1所述的一种矩阵像素器件投影显示器的三色会聚方法,其特征在于所说的用于图像探测的图像传感器,是指CCD或者CMOS图像传感器。 4. A matrix according to one of claim 1 to claim convergence method three-color pixel projection display device, wherein said image sensor for image detection, refers to a CCD or CMOS image sensor.
5.根据权利要求1所述的一种矩阵像素器件投影显示器的三色会聚方法,其特征在于所说的在屏幕上按照一定的规则安装多个图像传感器构成的多通道图像传感器,是指根据系统要求在屏幕的上下左右中不同视场安装图像传感器,或者其他规则的排布方法组成的多个图像传感器的多通道图像传感器。 The three-color pixel matrix method of condensing projection display device according to claim 1, wherein said multi-channel image sensor mounted on a screen a plurality of image sensors constructed in accordance with certain rules are defined according to the system requires a plurality of image sensors in the vertical and horizontal fields of view of the screen different from the installed image sensor, or other regular arrangement method consisting of the multi-channel image sensor.
6.根据权利要求1所述的一种矩阵像素器件投影显示器的三色会聚方法,其特征在于所说的将不同方位的图像数据采集到计算机后运用图像平滑、滤波、锐化图像处理技术,然后运用适当的评价方法来判别对焦的清晰度和三色合色的精度是否达到要求。 6. A method of converging three-color pixel matrix projection display device according to claim 1, wherein said different orientations of the collected image data to the computer using image smoothing, filtering, sharpening image processing technology, and then use the appropriate method to evaluate the clarity and focus determining three color combiner whether the requirements of accuracy.
7.根据权利要求1所述的一种矩阵像素器件投影显示器的三色会聚方法,其特征在于所说的运用六自由度精密机械手实现矩阵像素器件在三个平动方向和三色转动方向进行微米或亚微米量级的精密控制。 The three-color pixel matrix method of condensing projection display device according to claim 1, wherein said six degrees of freedom using precision manipulator device of a matrix of pixels in the direction of rotation and three translational directions for three colors micron or submicron precision control.
8.根据权利要求1所述的一种矩阵像素器件投影显示器的三色会聚方法,其特征在于所说的综合不同方位的图像传感器的图像数据以及其方位排布方式,根据评价函数,计算出矩阵像素器件在不同方向和理想位置的偏差量,由六自由度机械手控制矩阵像素器件到合适位置,从而实现矩阵像素器件的全空间调节。 8. A method of converging three-color pixel matrix projection display device according to claim 1, wherein the image data of the image sensor, different orientations of said integrated arrangement and its orientation manner, in accordance with the evaluation function to calculate the matrix pixel device in a different direction and amount of deviation of the ideal position, six degrees of freedom by the robot control device to place the pixel matrix, so as to achieve full spatial matrix pixel device adjustment.
9.根据权利要求1所述的一种矩阵像素器件投影显示器的三色会聚方法,其特征在于所说的三个显示芯片的快速固化曝光过程,是指应用光敏粘合剂实现多通道并行紫外曝光紫外光照明系统,使得三个显示芯片的瞬态固化,同时应用多通道图像传感技术监控,并反馈校正、控制紫外曝光过程。 9. A method of converging three colors in accordance with claim matrix pixel projection display device according to claim 1, wherein said rapid solidification exposure process three display chip, refers to the application of the photosensitive adhesive multi-channel parallel UV UV exposure illumination system, such that the transient cured three display chip, multi-channel image while sensor-monitored, and the feedback correction, UV exposure control process.
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