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    • 41. 发明授权
    • Integrating xerographic light emitter array with grey scale
    • 将静电照相发射器阵列与灰度级集成
    • US6072517A
    • 2000-06-06
    • US785233
    • 1997-01-17
    • David K. ForkZoran D. Popovic
    • David K. ForkZoran D. Popovic
    • B41J2/45G09G3/32H04N1/40G01D15/14
    • G09G3/3233B41J2/45G09G3/3258H04N1/40025H04N1/40043G09G2300/0842
    • An integrating xerographic light emitter array includes circuitry for operating an active matrix array of organic light emitting diodes (OLEDs). The light emitter array stages rows of emitters in the slow scan direction and moves the object image and synchronization with the photoreceptor. Grey scale resolution, increased emitter lifetime and the ability to operate at lower light levels are achieved in proportion to the number of stages. The entire printbar can be rewritten during each line time of the photoreceptor, which allows the exposure on any pixel on the photoreceptor to be varied in a number of grey levels from zero to the number of stages. Bringing a grey level signal to the photoreceptor allows improved continuous tone image quality and line placement. Additional grey resolution is obtained by analog driving of individual pixels. This technique is applicable to a variety of emitters or light valves, but is particularly suited to inexpensive OLEDs. Greater exposure uniformity results because each photoreceptor spot receives light from an ensemble of emitters. The integrating xerographic light emitter array can also use static digital memory which is particularly suited to random access display writing.
    • 集成静电照相发光器阵列包括用于操作有机发光二极管(OLED)的有源矩阵阵列的电路。 光发射器阵列在慢扫描方向上排列发射器的行并移动对象图像并与感光体同步。 实现灰阶分辨率,增加的发射器寿命以及在较低的光照水平下操作的能力与阶段的数量成比例地实现。 可以在感光体的每个行时间期间重写整个打印条,这允许在感光体上的任何像素上的曝光在从零到数量级的多个灰度级中变化。 将灰度信号带到感光体可以改善连续色调图像质量和线放置。 通过单个像素的模拟驱动获得额外的灰度分辨率。 这种技术适用于各种发射器或光阀,但是特别适用于廉价的OLED。 由于每个感光体点都接收到来自发射体的集合的光,因此产生更大的曝光均匀性。 积分静电照相发光阵列还可以使用特别适合于随机存取显示写入的静态数字存储器。