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    • 3. 发明授权
    • Image forming apparatus and method for controlling image density
    • 用于控制图像密度的图像形成装置和方法
    • US08503893B2
    • 2013-08-06
    • US12714790
    • 2010-03-01
    • Akira YoshidaNobutaka TakeuchiShin HasegawaYoshiaki MiyashitaKohta FujimoriKayoko Tanaka
    • Akira YoshidaNobutaka TakeuchiShin HasegawaYoshiaki MiyashitaKohta FujimoriKayoko Tanaka
    • G03G15/08
    • G03G15/0851G03G15/0849G03G15/0853G03G2215/0607
    • An image forming apparatus includes a developer unit to store two-component developer which includes toner and carrier and develop an electrostatic latent image formed on the image carrier, a toner concentration detector to detect toner concentration in the developer unit, a toner supply unit to supply toner to the developer unit, and a controller to control toner supply amount by controlling the toner supply unit by comparing an output value of the toner concentration detector with a reference value stored in a memory and correcting difference between output values of the toner concentration detector at two or more process linear velocities in accordance with the toner concentration in the developer unit. A compensation amount for correcting difference between output values of the toner concentration detector that differ depending on the process linear velocity is adjustable in accordance with the toner concentration in the development unit.
    • 图像形成装置包括:显影单元,用于存储包括调色剂和载体的双组分显影剂,并显影形成在图像载体上的静电潜像;调色剂浓度检测器,用于检测显影单元中的调色剂浓度;调色剂供应单元, 调色剂到显影剂单元,以及控制器,通过将调色剂浓度检测器的输出值与存储在存储器中的参考值进行比较来控制调色剂供应单元来控制调色剂供应量,并且校正调色剂浓度检测器的输出值之间的差异 根据显影剂单元中的调色剂浓度的两个或多个过程线速度。 用于校正根据处理线速度不同的调色剂浓度检测器的输出值之差的补偿量根据显影单元中的调色剂浓度而调节。
    • 4. 发明申请
    • IMAGE FORMING APPARATUS AND IMAGE DENSITY CONTROL METHOD
    • 图像形成装置和图像密度控制方法
    • US20090202263A1
    • 2009-08-13
    • US12367736
    • 2009-02-09
    • Akira YOSHIDAShin HasegawaHitoshi IshibashiYoshiaki MiyashitaKohta FujimoriNobutaka TakeuchiKayoko TanakaYushi HirayamaTetsuya Muto
    • Akira YOSHIDAShin HasegawaHitoshi IshibashiYoshiaki MiyashitaKohta FujimoriNobutaka TakeuchiKayoko TanakaYushi HirayamaTetsuya Muto
    • G03G15/00G03G15/06
    • G03G15/0131G03G15/5058G03G2215/00037G03G2215/00042G03G2215/00059G03G2215/00063
    • An image forming apparatus includes a control device that calculates a developing ability of the developing device based on a detection value detected by an optical detection device from the plural toner patches. The control device adjusts an image formation condition based on the calculated developing ability. A factor detection device is provided to detect a contributing factor that causes the developing ability to largely change after the last adjustment of the image formation condition. The control device controls image formation such that when the factor detection device does not detect the contribution factor and a developing ability calculated this time is different from that calculated last time (as to a part of the plural toner patches), the plural toner patches are formed based on a prescribed fixed image formation condition so that an attraction amount of toner attracting to the plural toner patches enter a prescribed range detectable for the optical detection device. The remaining toner patches are formed (based on an image formation condition determined) in accordance with the image formation condition previously adjusted. When the detection device detects the contribution factor, the entire toner patches are formed based on the prescribed fixed condition.
    • 图像形成装置包括控制装置,其基于来自多个调色剂贴片的由光学检测装置检测的检测值来计算显影装置的显影能力。 控制装置基于计算出的显影能力来调整图像形成条件。 提供了一种因素检测装置,用于检测在最后一次调整图像形成条件之后导致显影能力发生很大变化的因素。 控制装置控制图像形成,使得当因子检测装置未检测到贡献因子,并且此次计算的显影能力与上次计算的不同(关于多个调色剂片的一部分)时,多个调色剂片是 基于规定的固定图像形成条件形成,使得吸引到多个调色剂贴片的调色剂的吸引量进入可检测的用于光学检测装置的规定范围。 根据先前调整的图像形成条件形成剩余调色剂片(基于确定的图像形成条件)。 当检测装置检测到贡献因子时,根据规定的固定条件形成整个调色剂贴片。
    • 9. 发明授权
    • Liquid crystal projector
    • 液晶投影仪
    • US5250967A
    • 1993-10-05
    • US813633
    • 1991-12-26
    • Yoshiaki Miyashita
    • Yoshiaki Miyashita
    • G03B21/00G02B5/08G02B26/08G02F1/1335G03B21/28G03B33/12H01G9/028H04N5/74H04N9/31
    • H04N9/317G02B26/0816G02B26/0875G02B5/08G02F1/133504
    • A liquid crystal projector for projecting original images formed on a liquid crystal panel onto a screen comprises optical means 3 between the liquid crystal panel 2 and the screen 4. The optical means 3 has a first refracting portion comprising planar glass plates 3a, 3c having a predetermined angle of inclination with respect to the optical axis of the panel, and a second refracting portion comprising planar glass plates 3b, 3d having an angle of inclination different from that of the first refracting portion. The position where an image is formed by the first refracting portion on the screen is shifted from the image forming position for the second refracting portion by a small amount corresponding to the pitch of picture elements on the screen to form projected images of improved quality.
    • 用于将形成在液晶面板上的原始图像投影到屏幕上的液晶投影仪包括在液晶面板2和屏幕4之间的光学装置3.光学装置3具有包括平面玻璃板3a,3c的第一折射部分, 预定的倾斜角相对于面板的光轴,第二折射部分包括具有与第一折射部的倾斜角不同的倾斜角的平面玻璃板3b,3d。 由屏幕上的第一折射部分形成图像的位置从第二折射部分的图像形成位置偏移与屏幕上的图像元素的间距相对应的少量,以形成质量提高的投影图像。
    • 10. 发明授权
    • Multiscreen projector apparatus
    • 多画面投影仪设备
    • US5116117A
    • 1992-05-26
    • US706832
    • 1991-05-29
    • Yoshiaki Miyashita
    • Yoshiaki Miyashita
    • G03B21/00G03B21/02G03B21/10G09F9/00G09F9/40H04N5/74H04N9/12
    • G03B37/04G03B21/10G03B21/28H04N9/12H04N9/3147
    • A cabinet (2) providing one projector unit has a side wall formed with a projecting portion (21) accommodating a projector (1) therein, and another side wall opposed to the side wall and formed with a recessed portion (22) shaped in conformity with the shape of the projecting portion (21). One or a plurality of reflecting mirrors (4), (41) are arranged within the cabinet (2) for flexing an optical path (9) extending from the projector (1) to a screen (3). A plurality of such cabinets (2) are assembled into a multiscreen projector apparatus by engaging the projecting portion (21) of each cabinet (2) in the recessed portion (22) of another cabinet (2) adjacent thereto.
    • 提供一个投影仪单元的机壳(2)具有侧壁,所述侧壁形成有容纳投影仪(1)的突出部分(21),并且与侧壁相对的另一侧壁形成有形成为一致的凹部(22) 具有突出部分(21)的形状。 一个或多个反射镜(4),(41)布置在机壳(2)内,用于使从投影仪(1)延伸到屏幕(3)的光路(9)弯曲。 通过将每个机壳(2)的突出部分(21)接合在与其相邻的另一机壳(2)的凹部(22)中,将多个这样的机柜(2)组装成多屏幕投影仪设备。