Projection lens system and projection image display apparatus using the same

    公开(公告)号:US20020008918A1

    公开(公告)日:2002-01-24

    申请号:US09793561

    申请日:2001-02-27

    申请人: Hitachi, Ltd.

    CPC分类号: G02B13/06 H04N5/74

    摘要: When a projection lens system used for a rear projection type image display apparatus has a first lens group having an aspherical lens surface, a second lens group, a third lens group sharing almost all the positive refractive power of the overall system, a fourth lens group having an aspherical lens surface, a fifth lens group, and a sixth lens group including a lens having a profile of aspherical surface in which the concave surface thereof faces the screen side and the refractive power in the marginal area is weaker than the refractive power around the optical axis, a projection lens system having a large aperture ratio (low F-number), high focus, wide field angle, and sufficient marginal light amount ratio can be realized at a low cost. When a predetermined opening portion is formed in the projection lens and lens barrel, the lens elements are cooled by air suction and exhaust and the lowering of the lens performance due to temperature change can be prevented. When a flange is arranged in a suitable location of the opening portion, entry of a foreign material from the opening portion and light leakage from the inside are prevented and the contrast performance of the projection type image display apparatus can be prevented from lowering.

    Liquid crystal display apparatus and optical device for use therein
    2.
    发明申请
    Liquid crystal display apparatus and optical device for use therein 有权
    液晶显示装置及其中使用的光学装置

    公开(公告)号:US20010033345A1

    公开(公告)日:2001-10-25

    申请号:US09886151

    申请日:2001-06-22

    申请人: Hitachi, Ltd.

    IPC分类号: G02F001/1335

    摘要: For obtaining both high brightness under condition of small-sized and simplified structure and suppression of increase in temperature of liquid crystal display elements and polarizing elements, in a liquid crystal display apparatus, comprising: a liquid crystal display element 2 for converting light from a light source into display picture depending on a driving signal; an optical projection system 1b containing a first optical element 1a and for projecting said light signal toward an object of projection; exit side polarizing elements 3b; a holding member 6 for holding them with the liquid crystal display element 2; and cooling medium 5; incident side polarizing elements 3a, wherein, a space is defined by either one of the incident side polarizing elements 3a and the liquid crystal display element 2, the first optical element 1a, between the liquid crystal display element 2 and the first optical element 1a, and the holding member 6, and said space is filled up with the cooling medium 5.

    摘要翻译: 为了在液晶显示装置和液晶显示装置的液晶显示装置和液晶显示装置的温度升高的条件下获得高亮度,并且抑制液晶显示元件和偏振元件的温度升高,包括:液晶显示元件2,用于将来自光的光 根据驱动信号将其输入显示图像; 包含第一光学元件1a并用于将所述光信号投射到投影物体的光学投影系统1b; 出射侧偏振元件3b; 用于将其保持在液晶显示元件2上的保持构件6; 和冷却介质5; 入射侧偏振元件3a,其中,由液晶显示元件2和第一光学元件1a之间的入射侧偏振元件3a和液晶显示元件2中的任一个,第一光学元件1a, 和保持构件6,并且所述空间被冷却介质5填充。

    Rear projection display apparatus and translucent screen for use therein
    3.
    发明申请
    Rear projection display apparatus and translucent screen for use therein 失效
    背投显示装置和半透明屏幕

    公开(公告)号:US20020109915A1

    公开(公告)日:2002-08-15

    申请号:US09967771

    申请日:2001-09-28

    申请人: Hitachi, Ltd.

    IPC分类号: G03B021/60

    CPC分类号: G03B21/625

    摘要: For providing a rear-projection type display apparatus, and a translucent type sheet for use therein, in particular, using an image modulation element, such as, a liquid crystal or a DMD (Digital Micro-mirror Device), etc., dissolving the speckle disturbances, thereby obtaining a picture being high in brightness and superior in resolution (focus property) thereof, wherein the translucent type screen comprises, a Fresnel sheet (6), at least on a light exit surface of which is formed a Fresnel lens (8), and a lenticular sheet (7), at least on a light incident surface of which is formed a lenticular lens (10) for diverging the light in horizontal direction, and the Fresnel sheet contains light diffusion material (9-1) while the lenticular sheet contains diffusion material (9-2), and being constructed so as to satisfy the condition as described below:15nullHfnullHLnull45Hf

    摘要翻译: 为了提供背投型显示装置和用于其中的半透明型片材,特别是使用诸如液晶或DMD(数字微镜装置)等图像调制元件,将 散斑干扰,从而获得亮度高和分辨率(聚焦特性)优异的图像,其中半透明型屏幕包括菲涅耳片(6),至少在光出射表面上形成菲涅尔透镜(6) 8)和透镜片(7),至少在其光入射表面上形成用于在水平方向上发散光的双凸透镜(10),并且菲涅耳片包含光漫射材料(9-1),同时 透镜片包含扩散材料(9-2),并被构造成满足如下所述的条件:<段落lvl =“0”>内嵌式> 15 <= Hf.HL <= 45 < / in-line-formula> <段落lvl =“0”> Hf 其中,Hf(%)i 指示指示菲涅耳板中扩散材料含量的雾度值,HL(%)表示透镜片中扩散材料含量的雾度值。

    On-line roll grinding apparatus, on-line roll grinding method rolling mill equipment and rolling method
    4.
    发明申请
    On-line roll grinding apparatus, on-line roll grinding method rolling mill equipment and rolling method 审中-公开
    在线辊磨机,在线轧辊研磨法轧机设备及轧制方法

    公开(公告)号:US20020052165A1

    公开(公告)日:2002-05-02

    申请号:US09940495

    申请日:2001-08-29

    申请人: HITACHI, LTD.

    发明人: Shigeru Mori

    IPC分类号: B24B049/00

    CPC分类号: B24B5/167 B21B28/04

    摘要: An on-line roll grinding apparatus which includes a grinding unit having a rotatable rotary grindstone for on-line grinding a rolling roll and a roughness adjusting unit capable of adjusting A surface roughness of the rolling roll, and which can adjust the surface roughness of the rolling roll in AN on-line roll grinding.

    摘要翻译: 一种在线辊磨机,其特征在于,包括:研磨单元,具有用于在线研磨轧辊的可旋转的旋转磨石和能够调节所述轧制辊的表面粗糙度的粗糙度调节单元,并且能够调节所述轧制辊的表面粗糙度 轧辊在AN在线辊磨。

    Projection lens system and projection image display apparatus using the same
    6.
    发明申请
    Projection lens system and projection image display apparatus using the same 失效
    投影透镜系统和使用其的投影图像显示装置

    公开(公告)号:US20040017616A1

    公开(公告)日:2004-01-29

    申请号:US10622642

    申请日:2003-07-21

    申请人: Hitachi, Ltd.

    CPC分类号: G02B13/06 H04N5/74

    摘要: When a projection lens system used for a rear projection type image display apparatus has a first lens group having an aspherical lens surface, a second lens group, a third lens group sharing almost all the positive refractive power of the overall system, a fourth lens group having an aspherical lens surface, a fifth lens group, and a sixth lens group including a lens having a profile of aspherical surface in which the concave surface thereof faces the screen side and the refractive power in the marginal area is weaker than the refractive power around the optical axis, a projection lens system having a large aperture ratio (low F-number), high focus, wide field angle, and sufficient marginal light amount ratio can be realized at a low cost. When a predetermined opening portion is formed in the projection lens and lens barrel, the lens elements are cooled by air suction and exhaust and the lowering of the lens performance due to temperature change can be prevented. When a flange is arranged in a suitable location of the opening portion, entry of a foreign material from the opening portion and light leakage from the inside are prevented and the contrast performance of the projection type image display apparatus can be prevented from lowering.

    摘要翻译: 当用于背投型图像显示装置的投影透镜系统具有具有非球面透镜表面的第一透镜组,第二透镜组,共享整个系统的几乎全部正折射力的第三透镜组时,第四透镜组 具有非球面透镜表面,第五透镜组和第六透镜组,所述第六透镜组包括具有非球面形状的透镜,其中凹面朝向屏幕侧,并且边缘区域中的折光力弱于周围的折光力 可以以低成本实现光轴,具有大开口率(低F值),高焦距,宽视野角和足够的边缘光量比的投影透镜系统。 当在投影透镜和透镜镜筒中形成预定的开口部分时,透镜元件通过吸气和排气被冷却,并且可以防止由于温度变化引起的透镜性能的降低。 当凸缘布置在开口部分的适当位置时,防止异物从开口部分进入并从内部漏光,并且可以防止突起型图像显示装置的对比度性能降低。

    Liquid crystal display apparatus and optical device for use therein
    7.
    发明申请
    Liquid crystal display apparatus and optical device for use therein 有权
    液晶显示装置及其中使用的光学装置

    公开(公告)号:US20030098944A1

    公开(公告)日:2003-05-29

    申请号:US10337400

    申请日:2003-01-07

    申请人: Hitachi, Ltd.

    IPC分类号: G02F001/1333

    摘要: For obtaining both high brightness under condition of small-sized and simplified structure and suppression of increase in temperature of liquid crystal display elements and polarizing elements, in a liquid crystal display apparatus, comprising: a liquid crystal display element 2 for converting light from a light source into display picture depending on a driving signal; an optical projection system 1b containing a first optical element 1a and for projecting said light signal toward an object of projection; exit side polarizing elements 3b; a holding member 6 for holding them with the liquid crystal display element 2; and cooling medium 5; incident side polarizing elements 3a, wherein, a space is defined by either one of the incident side polarizing elements 3a and the liquid crystal display element 2, the first optical element 1a, between the liquid crystal display element 2 and the first optical element 1a, and the holding member 6, and said space is filled up with the cooling medium 5.

    摘要翻译: 为了在液晶显示装置和液晶显示装置的液晶显示装置和液晶显示装置的温度升高的条件下获得高亮度,并且抑制液晶显示元件和偏振元件的温度升高,包括:液晶显示元件2,用于将来自光的光 根据驱动信号将其输入显示图像; 包含第一光学元件1a并用于将所述光信号投射到投影物体的光学投影系统1b; 出射侧偏振元件3b; 用于将其保持在液晶显示元件2上的保持构件6; 和冷却介质5; 入射侧偏振元件3a,其中,由液晶显示元件2和第一光学元件1a之间的入射侧偏振元件3a和液晶显示元件2中的任一个,第一光学元件1a, 和保持构件6,并且所述空间被冷却介质5填充。

    Projection lens system and projection image display apparatus using the same

    公开(公告)号:US20020196556A1

    公开(公告)日:2002-12-26

    申请号:US10142864

    申请日:2002-05-13

    申请人: Hitachi, Ltd.

    IPC分类号: G02B003/00 G02B009/00

    CPC分类号: G02B13/06 H04N5/74

    摘要: When a projection lens system used for a rear projection type image display apparatus has a first lens group having an aspherical lens surface, a second lens group, a third lens group sharing almost all the positive refractive power of the overall system, a fourth lens group having an aspherical lens surface, a fifth lens group, and a sixth lens group including a lens having a profile of aspherical surface in which the concave surface thereof faces the screen side and the refractive power in the marginal area is weaker than the refractive power around the optical axis, a projection lens system having a large aperture ratio (low F-number), high focus, wide field angle, and sufficient marginal light amount ratio can be realized at a low cost. When a predetermined opening portion is formed in the projection lens and lens barrel, the lens elements are cooled by air suction and exhaust and the lowering of the lens performance due to temperature change can be prevented. When a flange is arranged in a suitable location of the opening portion, entry of a foreign material from the opening portion and light leakage from the inside are prevented and the contrast performance of the projection type image display apparatus can be prevented from lowering.

    Online roll grinding method and online roll grinding apparatus
    10.
    发明申请
    Online roll grinding method and online roll grinding apparatus 有权
    在线辊磨法和在线辊磨机

    公开(公告)号:US20010009842A1

    公开(公告)日:2001-07-26

    申请号:US09768455

    申请日:2001-01-25

    申请人: HITACHI, LTD.

    IPC分类号: B24B001/00

    摘要: Upper and lower working rolls 2a, 2b are ground while moving respective grindstone devices 3a, 3b in reverse directions, whereby the region of grinding for the upper working roll 2a and that for the lower working roll 2b are maintained in symmetry with respect to the center of rolls, one on the operating side and the other on the driving side. By this arrangement, it is possible to equalize the coefficients of friction on the operating side and the driving side, and to prevent meandering of the rolling stock 6 as well as drawing (squeezing) or bad product shape due to the meandering from occurring. The timings to start grinding by the grindstone devices 3a, 3b are set to be substantially the same, and the velocities of movement of the grindstone devices 3a, 3b in the axial direction of the working rolls are set to be equal, whereby the difference in frictional coefficient due to grinding in the longitudinal direction of the rolls can stably be kept small.

    摘要翻译: 上下工作辊2a,2b在相反的方向移动相应的磨石装置3a,3b的同时进行研磨,由此上工作辊2a和下工作辊2b的磨削区域相对于中心保持对称 的辊,一个在操作侧,另一个在驱动侧。 通过这种布置,可以使操作侧和驱动侧的摩擦系数相等,并且防止由于发生蜿蜒而产生的滚动体6的弯曲以及拉伸(挤压)或不良的产品形状。 磨石装置3a,3b开始研磨的时刻被设定为大致相同,并且将磨石装置3a,3b在工作辊的轴向上的移动速度设定为相等, 可以稳定地保持由于在辊的长度方向上的研磨而产生的摩擦系数。