公开(公告)号：US06617801B2

公开(公告)日：2003-09-09

申请号：US10152812

申请日：2002-05-23

申请人： Shinichi Ishizuka ,  Hideo Ochi ,  Masaki Murakata ,  Takayoshi Yoshida

发明人： Shinichi Ishizuka ,  Hideo Ochi ,  Masaki Murakata ,  Takayoshi Yoshida

IPC分类号： G09G310

CPC分类号： G09G3/3216 ,  G09G3/3266 ,  G09G3/3275 ,  G09G2310/0256 ,  G09G2320/043 ,  G09G2320/048 ,  G09G2330/021 ,  G09G2330/04 ,  G09G2330/045

摘要： A drive device for a light-emitting panel that is capable of adjusting the anode power source voltage to be applied to anode leads of the light-emitting panel to a suitable voltage value with low power consumption and in a reliable fashion. A prescribed anode lead of the anode leads of the light-emitting panel is designated as the anode lead that is to be the subject of detection. The voltage value on this anode lead which is the subject of detection is input as the forward voltage value only while display is being performed in accordance with prescribed information data to cause drive current to be supplied to at least the anode lead that is the subject of detection, and the anode power source voltage is adjusted in accordance with this forward voltage value.

公开(公告)号：US06774878B2

公开(公告)日：2004-08-10

申请号：US10238850

申请日：2002-09-11

申请人： Takayoshi Yoshida ,  Masaki Murakata

发明人： Takayoshi Yoshida ,  Masaki Murakata

IPC分类号： G09G330

CPC分类号： G09G3/3216 ,  G09G3/3283 ,  G09G2310/04 ,  G09G2310/061 ,  G09G2310/062 ,  G09G2330/021 ,  G09G2330/04

摘要： In a drive unit for a luminescence display panel employing organic EL elements as light-emitting elements and capable of reducing power consumed by the display panel when a partial scan mode is selected, when the partial scan mode is selected by a scan mode switching mean, a control is performed so that the ratio of a drive period (D3), during which the light emission of the light-emitting elements is controlled, to a reset period (R1) set by a reset control means is increased as compared with a case in which the ordinary scan mode is selected. Thus, the momentary luminance of the light-emitting elements can be lowered by further reducing drive currents or drive voltages supplied to the respective light-emitting elements. Accordingly, it is possible to further reduce the power consumption of the luminescence display panel as well as to prevent the deterioration of the light-emitting elements, which contributes to extend the life of the light-emitting elements.

摘要翻译： 在采用有机EL元件作为发光元件的发光显示面板的驱动单元中，当选择了部分扫描模式时能够降低显示面板消耗的功率，当通过扫描模式切换装置选择部分扫描模式时， 执行控制，使得将控制发光元件的发光的驱动周期（D3）与由复位控制装置设置的复位时段（R1）的比率与情况相比增加 其中选择普通扫描模式。 因此，可以通过进一步减少提供给各个发光元件的驱动电流或驱动电压来降低发光元件的瞬时亮度。 因此，可以进一步降低发光显示面板的功耗，并且可以防止有助于延长发光元件寿命的发光元件的劣化。

公开(公告)号：US07088319B2

公开(公告)日：2006-08-08

申请号：US10253719

申请日：2002-09-25

申请人： Takayoshi Yoshida ,  Masaki Murakata

发明人： Takayoshi Yoshida ,  Masaki Murakata

IPC分类号： G09G3/30 ,  G09G3/32

CPC分类号： G09G3/3216 ,  G09G2310/0248 ,  G09G2310/0254 ,  G09G2320/0247 ,  G09G2320/0252 ,  G09G2320/029 ,  G09G2320/043 ,  G09G2330/021 ,  G09G2330/026 ,  G09G2330/028

摘要： Light-emitting elements disposed on a light-emitting display panel are driven by constant currents, and the forward direction voltages of the light-emitting elements are obtained by a sampling/holding circuit. Then, the voltage output from a drive voltage source composed of a DC-DC converter is controlled by the forward direction voltages obtained by the sampling/holding circuit. For example, when the light-emitting display panel starts to be driven for light emission or when the light emission luminance of the light-emitting display panel that is being driven for light emission is to be increased, a control signal is sent from a light emission control circuit to a voltage forcibly changing circuit which supplies an output voltage increase command to the PWM circuit of the drive voltage source. With this arrangement, the rising-up property of the light-emitting display panel and the following property of luminance can be improved.

公开(公告)号：US5500381A

公开(公告)日：1996-03-19

申请号：US413616

申请日：1995-03-30

申请人： Takayoshi Yoshida ,  Yasunobu Nashimoto

发明人： Takayoshi Yoshida ,  Yasunobu Nashimoto

IPC分类号： H01L29/812 ,  H01L21/285 ,  H01L21/335 ,  H01L21/338 ,  H01L29/778

CPC分类号： H01L29/66462 ,  H01L21/28587 ,  H01L29/7787 ,  Y10S148/10

摘要： A fabrication method of a FET that enables to realize a shorter length between a source-side edge of a recess and an opposing edge of a gate electrode at a higher accuracy than the accuracy limit of the present lithography technique, i.e., about .+-.0.1 .mu.m. After channel, carrier-supply, and contact layers are epitaxially grown on a semiconductor substrate in this order, a patterned insulator layer is formed on the contact layer. Using the insulator layer as a mask, the contact layer is isotropically etched to form a symmetrical recess on the underlying carrier-supply layer. One of the ends of the contact layer facing the symmetrical recess is etched again to make it asymmetric. During the etching processes, the underlying carrier-supply layer is almost never etched due to large etch rate differences for the contact layer and the carrier-supply layer. A patterned conductor layer is formed on the patterned insulator layer to form the gate electrode in Schottky contact with the carrier-supply layer. After removing the insulator layer, and source and drain electrodes are formed on the contact layer. An etch-stop layer is additionally formed between the carrier-supply layer and the contact layer.

摘要翻译： 一种FET的制造方法，其能够以比本光刻技术的精度极限更高的精度实现凹部的源极侧边缘和栅电极的相对边缘之间的更短的长度，即约+/- 0.1亩。 在半导体衬底上依次外延生长通道，载流子供应和接触层之后，在接触层上形成图案化的绝缘体层。 使用绝缘体层作为掩模，接触层被各向同性地蚀刻以在下层载体供给层上形成对称的凹部。 面对对称凹部的接触层的端部之一被再次蚀刻以使其不对称。 在蚀刻工艺期间，由于接触层和载体供应层的较大的蚀刻速率差，底层载体供应层几乎不被蚀刻。 在图案化的绝缘体层上形成图案化导体层，以形成与载体供给层肖特基接触的栅电极。 在去除绝缘体层之后，在接触层上形成源极和漏极。 在载体供给层和接触层之间另外形成蚀刻停止层。

公开(公告)号：US07479955B2

公开(公告)日：2009-01-20

申请号：US11212561

申请日：2005-08-29

申请人： Takayoshi Yoshida

发明人： Takayoshi Yoshida

IPC分类号： G09G5/00

CPC分类号： G09G3/3233 ,  G09G2300/0842 ,  G09G2320/029 ,  G09G2320/041 ,  G09G2320/043 ,  G09G2330/021

摘要： In a light emitting display panel 10, a large number of light emitting display pixels 10a are arranged in a matrix pattern, and a monitoring element Ex is provided therein which can extract a voltage which corresponds to the forward voltage of EL elements E1 on the display panel. By a signal from a current consumption detection section 14 which detects current consumption in the light emitting display panel 10, a drive ratio control section 15 performs ON/OFF control of a transistor Tr3 which is connected in series to the monitoring element Ex to control current provided from a constant current circuit. Thus, progression rates of agings of the monitoring element Ex and the EL elements E1 arranged in the display panel can be controlled to roughly coincide with each other, and a power loss generated in a light emission drive transistor Tr2 in each pixel 10a can be restrained as much as possible.

摘要翻译： 在发光显示面板10中，大量的发光显示像素10a以矩阵形式配置，并且在其中设置监视元件Ex，其能够提取与显示器上的EL元件E1的正向电压对应的电压 面板。 通过来自检测发光显示面板10中的电流消耗的电流消耗检测部14的信号，驱动比控制部15对与监视元件Ex串联连接的晶体管Tr3进行ON / OFF控制，以控制电流 由恒流电路提供。 因此，监视元件Ex和布置在显示面板中的EL元件E1的渐变速度可以被控制为大致一致，并且可以抑制在每个像素10a中的发光驱动晶体管Tr2中产生的功率损耗 越多越好。

公开(公告)号：US07187350B2

公开(公告)日：2007-03-06

申请号：US10684442

申请日：2003-10-15

申请人： Takayoshi Yoshida

发明人： Takayoshi Yoshida

IPC分类号： G09G3/30 ,  G09G3/10

CPC分类号： G09G3/3233 ,  G09G3/2011 ,  G09G2300/0809 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0861 ,  G09G2300/0866 ,  G09G2310/06 ,  G09G2310/061 ,  G09G2320/02 ,  G09G2320/043

摘要： One pixel (10) is comprised of a controlling TFT (Tr1), a TFT (Tr3) functioning as a threshold voltage generating element, a TFT (Tr4) functioning as a reset element, a driving TFT (Tr2), a capacitor (C1) holding the gate voltage of the driving TFT, a TFT (Tr5) functioning as a current restraining means for being controlled so as to be OFF at a reset operation time, and an EL element (E1). At the reset operation time in which a terminal voltage of the capacitor (C1) is reset to a predetermined electrical potential, a current restraining means comprising the TFT (Tr5) is controlled so as to prevent excess current due to an operation of the driving TFT (Tr2) from being imparted to the EL element (E1).

摘要翻译： 一个像素（10）由控制TFT（Tr 1），用作阈值电压产生元件的TFT（Tr 3），用作复位元件的TFT（Tr 4），驱动TFT（Tr 2） 保持驱动TFT的栅极电压的电容器（C 1），用作在复位操作时被控制为OFF的电流抑制装置的TFT（Tr 5）和EL元件（E 1）。 在电容器（C1）的端子电压被复位到预定电位的复位操作时间，控制由TFT（Tr 5）构成的电流抑制装置，以防止由于 驱动TFT（Tr 2）被赋予EL元件（E 1）。

公开(公告)号：US07248255B2

公开(公告)日：2007-07-24

申请号：US10770394

申请日：2004-02-04

申请人： Takayoshi Yoshida

发明人： Takayoshi Yoshida

IPC分类号： G09G5/00

CPC分类号： G09G3/3258 ,  G09G2300/0842 ,  G09G2320/029 ,  G09G2320/043 ,  G09G2320/045 ,  G09G2330/028

摘要： In a light emitting display device which is actively driven by TFTs, light emitting display pixels are driven efficiently. In a light emitting display panel 10, a large number of light emitting display pixels 10a are arranged in a matrix pattern and measuring pixels 10b are arranged forming a line along one dataline. A constant current is supplied from a constant current source 11 to the measuring pixels 10b, and the forward voltage VF of the EL element in the measuring pixel 10b is obtained by a voltage detecting terminal 12. The value of the drive voltage supplied to the light emitting display pixels 10a is controlled based on the forward voltage VF. Thus, a drive TFT (Tr2) constructing the light emitting display pixel 10a can drive an EL element E1 in the state where a drop voltage (VD) of the degree by which a constant current characteristic can be ensured is ensured, and a power loss generated in the drive TFT can be effectively restrained.

摘要翻译： 在由TFT主动驱动的发光显示装置中，有效地驱动发光显示像素。 在发光显示面板10中，大量的发光显示像素10a被配置成矩阵图案，并且测量像素10b被布置成沿着一个数据线形成一条线。 从恒定电流源11向测量像素10b提供恒定电流，并且通过电压检测端子12获得测量像素10b中的EL元件的正向电压VF。提供给 基于正向电压VF来控制发光显示像素10a。 因此，构成发光显示像素10a的驱动TFT（Tr2）能够确保能够确保恒定电流特性的程度的下降电压（VD）的状态下驱动EL元件E 1， 可以有效地抑制在驱动TFT中产生的功率损耗。

公开(公告)号：US07236148B2

公开(公告)日：2007-06-26

申请号：US10255179

申请日：2002-09-26

申请人： Takayoshi Yoshida ,  Shinobu Adachi

发明人： Takayoshi Yoshida ,  Shinobu Adachi

IPC分类号： G09G3/30

CPC分类号： G09G3/3216 ,  G09G2310/0248 ,  G09G2310/0254 ,  G09G2320/0247 ,  G09G2320/0252 ,  G09G2320/029 ,  G09G2320/041 ,  G09G2320/043 ,  G09G2330/021 ,  G09G2330/028

摘要： Light-emitting elements disposed on a light-emitting display panel are driven by constant currents, and the forward direction voltages of the light-emitting elements are obtained by a sampling/holding circuit. Then, the voltage output from a drive voltage source composed of a DC-DC converter is controlled by the forward direction voltages obtained by the sampling/holding circuit. For example, in a case in which the light emission luminance of the light-emitting display panel is changed or in other case, a sampling and holding operation is executed by the sampling/holding circuit in response to a control signal from a sampling timing control circuit at intervals shorter than ordinary intervals. With this arrangement, when light emission luminance of a light-emitting display panel is changed, the gentle changing characteristics of the light emission luminance thereof can be improved.

摘要翻译： 配置在发光显示面板上的发光元件由恒定电流驱动，发光元件的正向电压由采样/保持电路获得。 然后，由由DC-DC转换器组成的驱动电压源输出的电压由采样/保持电路获得的正向电压控制。 例如，在发光显示面板的发光亮度变化的情况下，或者在其他情况下，采样/保持电路响应于来自采样定时控制的控制信号执行采样保持操作 电路间隔短于普通间隔。 利用这种布置，当发光显示面板的发光亮度改变时，可以提高其发光亮度的温和变化特性。

公开(公告)号：US07193589B2

公开(公告)日：2007-03-20

申请号：US10699704

申请日：2003-11-04

申请人： Takayoshi Yoshida ,  Katsuhiro Kanauchi

发明人： Takayoshi Yoshida ,  Katsuhiro Kanauchi

IPC分类号： G09G3/30

CPC分类号： G09G3/3233 ,  G09G3/3241 ,  G09G3/325 ,  G09G2300/0809 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0852 ,  G09G2300/0866 ,  G09G2310/0254 ,  G09G2310/0256 ,  G09G2320/0252 ,  G09G2320/043

摘要： In a drive device for an active type light emitting display panel which can apply a reverse bias voltage to an EL element, in order to be able to compensate deterioration in light-emitting efficiency of the EL element accompanied by applying of the reverse bias voltage and the like, one pixel 10 is composed of a controlling TFT (Tr1), the driving TFT (Tr2), a capacitor C1, and the EL element E1. Switching switches SW1, SW2 mutually enables a supplying state of a forward current to the EL element E1 and an applying state of the reverse bias voltage to be selected. In one control form according to the present invention, when the applying state of the reverse bias voltage shifts to the supplying state of the forward current, by switching one switch first, the anode and cathode of the EL element E1 are made to the same electrical potential to allow electrical charges to be discharged. Thus, charge of the forward current for a parasitic capacitance of the EL element E1 can be performed rapidly, and rising of the lighting operation of the EL element can be advanced.

摘要翻译： 在可以向EL元件施加反向偏置电压的有源型发光显示面板的驱动装置中，为了补偿伴随着反向偏置电压的施加而导致的EL元件的发光效率的劣化，以及 一个像素10由控制TFT（Tr 1），驱动TFT（Tr 2），电容器C 1和EL元件E 1组成。开关SW 1，SW 2相互使能 到EL元件E 1的正向电流和要选择的反向偏置电压的施加状态。 在根据本发明的一种控制形式中，当反向偏置电压的施加状态转移到正向电流的供给状态时，首先切换一个开关，使EL元件E 1的阳极和阴极相同 允许电荷放电的电位。 因此，可以快速地执行用于EL元件E 1的寄生电容的正向电流的充电，并且可以提高EL元件的点亮操作的上升。

公开(公告)号：US06351076B1

公开(公告)日：2002-02-26

申请号：US09679516

申请日：2000-10-06

申请人： Takayoshi Yoshida ,  Yoichi Satake

发明人： Takayoshi Yoshida ,  Yoichi Satake

IPC分类号： G09G310

CPC分类号： G09G3/3216 ,  G09G3/3266 ,  G09G3/3283 ,  G09G2300/06 ,  G09G2310/0221 ,  G09G2310/0251 ,  G09G2310/063 ,  G09G2360/18

摘要： There is specified an illumination drive line assigned to a capacitive luminescent element which is connected to a single scanning line and is to be illuminated in accordance with an input video signal during a scanning period. A first potential lower than an illumination threshold voltage of the capacitive luminescent element is applied to a single scanning line, and a second potential higher than the illumination threshold voltage is applied to the scanning lines other than the single scanning line. A drive current is supplied to the illumination drive line for forwardly applying a positive voltage higher than the illumination threshold voltage to the capacitive luminescent element to be illuminated. A third potential slightly lower than the illumination threshold voltage is applied to the drive lines other than the illumination drive line. During a reset period defined between scanning periods, the second potential is applied to all the scanning lines, and a fourth potential equal to the second potential is supplied to the drive line other than the non-reset drive line.

摘要翻译： 指定分配给电容发光元件的照明驱动线，其连接到单个扫描线并且在扫描周期期间根据输入视频信号被照亮。 将低于电容发光元件的照明阈值电压的第一电位施加到单个扫描线，并且将高于照明阈值电压的第二电位施加到除了单个扫描线之外的扫描线。 驱动电流被提供给照明驱动线路，用于向被照明的电容发光元件正向施加高于照明阈值电压的正电压。 稍微低于照明阈值电压的第三电位被施加到除了照明驱动线之外的驱动线。 在扫描周期之间定义的复位周期期间，将第二电位施加到所有扫描线，并且等于第二电位的第四电位被提供给非复位驱动线以外的驱动线。