公开(公告)号：US06168252A

公开(公告)日：2001-01-02

申请号：US09162059

申请日：1998-09-28

Applicant: Masao Yaji

Inventor： Masao Yaji

IPC: B41J2938

CPC classification number: B41J2/0454 ,  B41J2/04541 ,  B41J2/04581 ,  B41J2202/10

Abstract: An ink jet printer has a printhead formed of a piezoelectric element having an electrical capacitance with a known temperature characteristic. A memory stores a reference temperature Tref and a reference capacitance Cref of the printhead measured at the reference temperature. A capacitance measuring section measures a capacitance Cm of the printhead at a temperature Te when the printer is in use. A temperature computing section computes the temperature Te on the basis of the reference capacitance Cref, the measured capacitance value Cm, and the reference temperature Tref. A table lists various values of the temperatures and corresponding values of the drive voltages. An optimum value is selected from among the values of the drive voltage listed in the table and is used for driving the printhead at the selected temperature.

Abstract translation: 喷墨打印机具有由具有已知温度特性的电容的压电元件形成的打印头。 存储器存储参考温度Tref和在参考温度下测量的打印头的参考电容Cref。 电容测量部分在打印机使用时以温度Te测量打印头的电容Cm。 温度计算部基于参考电容Cref，测量电容值Cm和基准温度Tref来计算温度Te。 表格列出了各种温度值和驱动电压的对应值。 从表中列出的驱动电压的值中选择最佳值，并用于在选定温度下驱动打印头。

公开(公告)号：US07480074B2

公开(公告)日：2009-01-20

申请号：US10787815

申请日：2004-02-26

Applicant: Masao Yaji

Inventor： Masao Yaji

IPC: H04N1/60

CPC classification number: G06K15/1247

Abstract: An image forming apparatus illuminates a pixel formation member with optical energy according to image data specifying a value for each pixel in the image. Some of the optical energy emitted to form a pixel is distributed over surrounding pixels; similarly, a pixel may receive peripheral optical energy that was emitted to form surrounding pixels. The amount of peripheral optical energy thus received is calculated, and the amount of optical energy emitted to form the pixel is adjusted to compensate for the peripheral optical energy, so that the total optical energy received by the pixel has the intended value. Image irregularities are thereby avoided, even if the image formation apparatus employs multiple light-emitting elements with different energy emission distributions.

Abstract translation: 图像形成装置根据指定图像中的每个像素的值的图像数据，用光能照射像素形成构件。 发射形成像素的一些光能分布在周围的像素上; 类似地，像素可以接收被发射以形成周围像素的周边光能。 计算如此接收的周边光能量，并调整形成像素的光能量的量以补偿外围光能，使得由像素接收的总光能具有预期值。 因此即使图像形成装置使用具有不同能量发射分布的多个发光元件，也避免了图像不规则。

公开(公告)号：US20070171478A1

公开(公告)日：2007-07-26

申请号：US11525825

申请日：2006-09-25

Applicant: Masao Yaji

Inventor： Masao Yaji

IPC: G06T5/00

CPC classification number: H04N1/40031 ,  H04N1/4015

Abstract: A pseudo random number generating circuit forms uniform distribution random number noises. An insertion noise data forming unit receives the uniform distribution random number noises, center-distributes them around 0 as a center, further reads out output correction values of every recording device from an LED characteristics variation data memory, center-distributes them on the basis of the output correction values, and outputs them. A noise inserting circuit receives an output of the insertion noise data forming unit and adds it to input image data. The occurrence a stripe-shaped concentration variation on an output image is prevented, so that a good output image is obtained.

Abstract translation: 伪随机数生成电路形成均匀分布随机数噪声。 插入噪声数据形成单元接收均匀分布随机数噪声，将它们以0为中心分布为中心，从LED特性变化数据存储器中读出每个记录装置的输出校正值，基于 输出校正值，并输出。 噪声插入电路接收插入噪声数据形成单元的输出并将其添加到输入图像数据。 防止输出图像上出现条纹状浓度变化，从而获得良好的输出图像。

公开(公告)号：US20060164499A1

公开(公告)日：2006-07-27

申请号：US11337443

申请日：2006-01-24

Applicant: Masao Yaji ,  Takashi Nakasendo

Inventor： Masao Yaji ,  Takashi Nakasendo

IPC: B41J2/385

CPC classification number: G03G15/043 ,  G03G15/0415 ,  G03G2215/04

Abstract: A printing apparatus for printing an image onto a recording medium based on input image data, comprises an electrostatic latent image carrier for forming an electrostatic latent image, and an exposure controller for forming the electrostatic latent image corresponding to one pixel upon exposure of the electrostatic latent image carrier with a combination of a plurality of different exposure amounts, wherein the exposure controller performs the exposure with the combination of the plurality of exposure amounts in a manner to satisfy a condition for an index value LNR expressed by a following general equation (1) using an optical density od (n) standardized on the condition of the maximum optical density equal to 1.0, identification information comb assigned to identify each combination of the plurality of exposure amounts, and the number of varieties m of a cumulative exposure amount used for modulation of the image data. LNR ≤ 2 / m ⁢ ⁢ LNR ⁡ ( comb ) = ∑ n = 0 m - 3 ⁢ [ { ( od ⁡ ( n + 2 ) - od ⁡ ( n + 1 ) ) - ( od ⁢ ( n + 1 ) - od ⁡ ( n ) ) } 2 ] / ( m - 2 ) ( 1 )

公开(公告)号：US20100188011A1

公开(公告)日：2010-07-29

申请号：US12694321

申请日：2010-01-27

Applicant: Toru KOSAKA ,  Masao Yaji ,  Akira Hagiwara

Inventor： Toru KOSAKA ,  Masao Yaji ,  Akira Hagiwara

IPC: H05B41/288 ,  H02M7/5395

CPC classification number: H05B41/2827

Abstract: A piezoelectric transformer driving device including: an oscillator; a frequency-divider outputting a pulse by dividing a clock signal from the oscillator by a frequency-divide ratio received thereto; a switching element driven by the pulse and intermittently applying a voltage to a primary side of a piezoelectric transformer; a frequency-divide ratio instructing unit holding a frequency-divide ratio instruction value of a real number having an integer part and an fractional part; a binarization unit binarizing the frequency-divide ratio instruction value into two different integer frequency-divide ratios and selectively outputting the frequency-divide ratios. The binarization unit adjusts an appearance ratio of the frequency-divide ratios such that an average of the frequency-divide ratios output from the binarization unit is equal to an average of the frequency-divide ratio instruction value.

Abstract translation: 一种压电变压器驱动装置，包括：振荡器; 分频器通过将来自振荡器的时钟信号除以接收到的分频比来输出脉冲; 由脉冲驱动并间断地向压电变压器的初级侧施加电压的开关元件; 分频比指令单元，其保持具有整数部分和小数部分的实数的分频比指令值; 二值化单元将分频比指令值二值化为两个不同的整数分频比，并选择性地输出分频比。 二值化单元调整分频比的出现比，使得从二值化单元输出的分频比的平均值等于分频比指令值的平均值。

公开(公告)号：US20100104313A1

公开(公告)日：2010-04-29

申请号：US12604473

申请日：2009-10-23

Applicant: Toru KOSAKA ,  Masao YAJI ,  Akira HAGIWARA

Inventor： Toru KOSAKA ,  Masao YAJI ,  Akira HAGIWARA

IPC: G03G15/00 ,  H02M5/00

CPC classification number: G03G15/1675 ,  G03G15/80

Abstract: A power source device includes an oscillator generating a clock, a frequency division unit dividing the clock to output a pulse, a sequence generation unit generating sequences “N” with respect to each switching of the pulse, a frequency division ratio setting unit setting frequency division ratio, a switching element driven by the pulse, and a piezoelectric transformer outputting alternating high voltage from a secondary-side when a primary-side is applied with voltage. The generated sequence and the set frequency division ratio are compared to output the pulses of fractional-M, −M+1 frequencies. An average frequency division ratio of the pulses of fractional-M, −M+1 frequencies determined by (M×α)+(M+1)×β/(α+β), where α and β respectively represent the number of pulses of “M” and “M+1” per unit time. The average frequency division ratio and frequency division ratio become equal at a sequence generation cycle and approximated in a period shorter than the sequence generation cycle.

Abstract translation: 电源装置包括产生时钟的振荡器，对时钟进行分频以输出脉冲的序列生成部，相对于脉冲的切换产生序列“N”，分频比设定部设定分频 比率，由脉冲驱动的开关元件，以及当初级侧施加电压时从次级侧输出交替高压的压电变压器。 将产生的序列和设定的分频比进行比较以输出分数M，-M + 1个频率的脉冲。 （M×α）+（M + 1）×＆bgr; /（α+＆bgr））确定的分数M，-M + 1频率的脉冲的平均分频比，其中α和＆ 分别表示每单位时间的“M”和“M + 1”的脉冲数。 平均分频比和分频比在序列生成周期变得相等，并且在比序列生成周期短的时段内近似。

公开(公告)号：US20080106765A1

公开(公告)日：2008-05-08

申请号：US11979414

申请日：2007-11-02

Applicant: Masao Yaji

Inventor： Masao Yaji

IPC: G06K15/00

CPC classification number: H04N1/407

Abstract: An image forming apparatus capable of realizing miniaturization of apparatus and low cost is supplied. In the image forming apparatus, an inputting section inputs gradation data values P with N bits; a gradation changing section changes the gradation data value P into a data set including 2(N−M) (M

Abstract translation: 提供能够实现装置的小型化和低成本的图像形成装置。 在图像形成装置中，输入部输入N位灰度数据值P; 灰度变化部分将灰度数据值P改变为包括具有M位的2（N-M）个（M

公开(公告)号：US07358983B2

公开(公告)日：2008-04-15

申请号：US11337443

申请日：2006-01-24

Applicant: Masao Yaji ,  Takashi Nakasendo

Inventor： Masao Yaji ,  Takashi Nakasendo

IPC: B41J2/47 ,  B41J2/385 ,  B41J2/435

CPC classification number: G03G15/043 ,  G03G15/0415 ,  G03G2215/04

Abstract: A printing apparatus for printing an image onto a recording medium based on input image data, comprises an electrostatic latent image carrier for forming an electrostatic latent image, and an exposure controller for forming the electrostatic latent image corresponding to one pixel upon exposure of the electrostatic latent image carrier with a combination of a plurality of different exposure amounts, wherein the exposure controller performs the exposure with the combination of the plurality of exposure amounts in a manner to satisfy a condition for an index value LNR expressed by a following general equation (1) using an optical density od (n) standardized on the condition of the maximum optical density equal to 1.0, identification information comb assigned to identify each combination of the plurality of exposure amounts, and the number of varieties m of a cumulative exposure amount used for modulation of the image data. LNR ≤ 2 / m ⁢ ⁢ LNR ⁡ ( comb ) = ∑ n = 0 m - 3 ⁢ [ { ( od ⁡ ( n + 2 ) - od ⁡ ( n + 1 ) ) - ( od ⁢ ( n + 1 ) - od ⁡ ( n ) ) } 2 ] / ( m - 2 ) . ( 1 )

公开(公告)号：US08174200B2

公开(公告)日：2012-05-08

申请号：US12694321

申请日：2010-01-27

Applicant: Toru Kosaka ,  Masao Yaji ,  Akira Hagiwara

Inventor： Toru Kosaka ,  Masao Yaji ,  Akira Hagiwara

IPC: H05B37/02 ,  H01J29/96

CPC classification number: H05B41/2827

Abstract: A piezoelectric transformer driving device including: an oscillator; a frequency-divider outputting a pulse by dividing a clock signal from the oscillator by a frequency-divide ratio received thereto; a switching element driven by the pulse and intermittently applying a voltage to a primary side of a piezoelectric transformer; a frequency-divide ratio instructing unit holding a frequency-divide ratio instruction value of a real number having an integer part and an fractional part; a binarization unit binarizing the frequency-divide ratio instruction value into two different integer frequency-divide ratios and selectively outputting the frequency-divide ratios. The binarization unit adjusts an appearance ratio of the frequency-divide ratios such that an average of the frequency-divide ratios output from the binarization unit is equal to an average of the frequency-divide ratio instruction value.

Abstract translation: 一种压电变压器驱动装置，包括：振荡器; 分频器通过将来自振荡器的时钟信号除以接收到的分频比来输出脉冲; 由脉冲驱动并间断地向压电变压器的初级侧施加电压的开关元件; 分频比指令单元，其保持具有整数部分和小数部分的实数的分频比指令值; 二值化单元将分频比指令值二值化为两个不同的整数分频比，并选择性地输出分频比。 二值化单元调整分频比的出现比，使得从二值化单元输出的分频比的平均值等于分频比指令值的平均值。

公开(公告)号：US07710601B2

公开(公告)日：2010-05-04

申请号：US11525825

申请日：2006-09-25

Applicant: Masao Yaji

Inventor： Masao Yaji

IPC: H04N1/60 ,  G06F3/12

CPC classification number: H04N1/40031 ,  H04N1/4015

Abstract: A pseudo random number generating circuit forms uniform distribution random number noises. An insertion noise data forming unit receives the uniform distribution random number noises, center-distributes them around 0 as a center, further reads out output correction values of every recording device from an LED characteristics variation data memory, center-distributes them on the basis of the output correction values, and outputs them. A noise inserting circuit receives an output of the insertion noise data forming unit and adds it to input image data. The occurrence a stripe-shaped concentration variation on an output image is prevented, so that a good output image is obtained.

Abstract translation: 伪随机数生成电路形成均匀分布随机数噪声。 插入噪声数据形成单元接收均匀分布随机数噪声，将它们以0为中心分布为中心，从LED特性变化数据存储器中读出每个记录装置的输出校正值，基于 输出校正值，并输出。 噪声插入电路接收插入噪声数据形成单元的输出并将其添加到输入图像数据。 防止输出图像上出现条纹状浓度变化，从而获得良好的输出图像。