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1. 发明授权

US09767761B2 Driver circuit 有权
公开(公告)号：US09767761B2
公开(公告)日：2017-09-19
申请号：US14845266
申请日：2015-09-03
申请人： LAPIS Semiconductor Co., Ltd.
发明人： Kenichi Shiibayashi , Koji Higuchi
IPC分类号： G09G3/36
CPC分类号： G09G3/3696 , G09G3/3688 , G09G2310/0291 , G09G2320/0223
摘要： A driver circuit driving a display device comprises: a gradation voltage generating circuit for generating m gradation voltages (m is an integer larger than or equal to 2) indicative of m stages of gradation levels; n decoder circuits each configured to select, out of the m gradation voltages, n drive voltages (n is an integer larger than or equal to 2) corresponding to n data pieces on the basis of n input gradation signals; m gradation voltage wirings each for transferring the m gradation voltages to the n decoder circuits, respectively; and a charge supplementing circuit for supplementing each of the m gradation voltage wirings with an amount of electric charge when a voltage drop occurs in the gradation voltage wirings.

2. 发明授权

US09202425B2 Device circuit and display apparatus having operational amplifiers with parasitic diodes 有权
标题翻译：具有具有寄生二极管的运算放大器的器件电路和显示装置
公开(公告)号：US09202425B2
公开(公告)日：2015-12-01
申请号：US14052952
申请日：2013-10-14
申请人： LAPIS SEMICONDUCTOR CO., LTD.
发明人： Hideaki Hasegawa , Atsushi Hirama , Koji Higuchi
IPC分类号： G09G3/36
CPC分类号： G09G3/3614 , G09G3/3688
摘要： A driving circuit includes a pair of operational amplifiers, one producing an analog voltage output of positive polarity, the other producing an analog voltage output of negative polarity. An output switching circuit interchanges these outputs between a pair of data lines. One or both of the operational amplifiers includes a parasitic diode having one terminal connected to the output terminal of the operational amplifier and another terminal normally connected to a power supply voltage of the operational amplifier. When the output of the operational amplifier is switched, a protective switching circuit temporarily disconnects the parasitic diode from the power supply of the operational amplifier and instead connects it to a power supply line carrying a voltage high enough, or low enough, to ensure that the parasitic diode is not forward biased by the existing voltage on the data line to which the output is switched.
摘要翻译：驱动电路包括一对运算放大器，一个产生正极性的模拟电压输出，另一个产生负极性的模拟电压输出。输出切换电路将这些输出交换在一对数据线之间。一个或两个运算放大器包括一个寄生二极管，其一个端子连接到运算放大器的输出端子，另一个端子正常连接到运算放大器的电源电压。当运算放大器的输出被切换时，保护开关电路暂时将寄生二极管与运算放大器的电源断开连接，而是将其连接到承载足够高或足够低的电压的电源线，以确保寄生二极管不会被输出切换到的数据线上的现有电压正向偏置。

3. 发明申请

US20140043221A1 DEVICE CIRCUIT AND DISPLAY APPARATUS HAVING OPERATIONAL AMPLIFIERS WITH PARASITIC DIODES 有权
标题翻译：具有PARASITIC DIODES的操作放大器的装置电路和显示装置
公开(公告)号：US20140043221A1
公开(公告)日：2014-02-13
申请号：US14052952
申请日：2013-10-14
申请人： LAPIS SEMICONDUCTOR CO., LTD.
发明人： Hideaki Hasegawa , Atsushi Hirama , Koji Higuchi
IPC分类号： G09G3/36
CPC分类号： G09G3/3614 , G09G3/3688
摘要： A driving circuit includes a pair of operational amplifiers, one producing an analog voltage output of positive polarity, the other producing an analog voltage output of negative polarity. An output switching circuit interchanges these outputs between a pair of data lines. One or both of the operational amplifiers includes a parasitic diode having one terminal connected to the output terminal of the operational amplifier and another terminal normally connected to a power supply voltage of the operational amplifier. When the output of the operational amplifier is switched, a protective switching circuit temporarily disconnects the parasitic diode from the power supply of the operational amplifier and instead connects it to a power supply line carrying a voltage high enough, or low enough, to ensure that the parasitic diode is not forward biased by the existing voltage on the data line to which the output is switched.
摘要翻译：驱动电路包括一对运算放大器，一个产生正极性的模拟电压输出，另一个产生负极性的模拟电压输出。输出切换电路将这些输出交换在一对数据线之间。一个或两个运算放大器包括一个寄生二极管，其一个端子连接到运算放大器的输出端子，另一个端子正常连接到运算放大器的电源电压。当运算放大器的输出被切换时，保护开关电路暂时将寄生二极管与运算放大器的电源断开连接，而是将其连接到承载足够高或足够低的电压的电源线，以确保寄生二极管不会被输出切换到的数据线上的现有电压正向偏置。

4. 发明授权

US11574609B2 Display device and data driver 有权
公开(公告)号：US11574609B2
公开(公告)日：2023-02-07
申请号：US17560190
申请日：2021-12-22
申请人： LAPIS Semiconductor Co., Ltd.
发明人： Hiroshi Tsuchi , Koji Higuchi
IPC分类号： G09G3/36
摘要： A display device and data driver are provided. The display device includes a plurality of data drivers provided for a predetermined number of data lines in a plurality of data lines. The plurality of data drivers receive the serialized video data signal from the display controller, generate a modulated data timing signal whose period changes within the one frame period, and supply a gradation voltage signal to each of the predetermined number of data lines for each of data periods based on a data timing of the modulated data timing signal, each of data periods corresponding to the data timing of the modulated data timing signal.

5. 发明申请

US20220114982A1 DISPLAY DEVICE AND DATA DRIVER 有权
公开(公告)号：US20220114982A1
公开(公告)日：2022-04-14
申请号：US17560190
申请日：2021-12-22
申请人： LAPIS Semiconductor Co., Ltd.
发明人： Hiroshi TSUCHI , Koji Higuchi
IPC分类号： G09G3/36
摘要： A display device and data driver are provided. The display device includes a plurality of data drivers provided for a predetermined number of data lines in a plurality of data lines. The plurality of data drivers receive the serialized video data signal from the display controller, generate a modulated data timing signal whose period changes within the one frame period, and supply a gradation voltage signal to each of the predetermined number of data lines for each of data periods based on a data timing of the modulated data timing signal, each of data periods corresponding to the data timing of the modulated data timing signal.

6. 发明授权

US10621943B2 Display device driver having pixel drive voltage delay selection 有权
公开(公告)号：US10621943B2
公开(公告)日：2020-04-14
申请号：US15205089
申请日：2016-07-08
申请人： LAPIS Semiconductor Co., Ltd.
发明人： Koji Higuchi
IPC分类号： G09G3/36
CPC分类号： G09G3/3696 , G09G3/3674 , G09G3/3677 , G09G3/3688 , G09G2320/0223 , G09G2320/0233
摘要： A display device driver includes: a pixel drive voltage application unit; and a delay controller. The pixel drive voltage application unit converts a plurality of pixel data pieces into a plurality of pixel drive voltages, the pixel data pieces respectively representing luminance levels of respective pixels based on a video signal, the pixel drive voltages respectively having voltage values corresponding to the luminance levels, and applies the converted pixel drive voltages to the display device. The delay controller controls the pixel drive voltage application unit to apply the plurality of pixel drive voltages to the display device, the plurality of pixel drive voltages being sequentially delayed in units of groups, the groups each including t pixel drive voltages, and sets delay time designated by delay time designation signals as delay time to delay each of the pixel drive voltages.

7. 发明授权

US09666143B2 Amplifying circuit 有权
公开(公告)号：US09666143B2
公开(公告)日：2017-05-30
申请号：US14855376
申请日：2015-09-15
申请人： LAPIS Semiconductor Co., Ltd.
发明人： Hiroyoshi Ichikura , Koji Higuchi
IPC分类号： H03F1/02 , G09G3/36 , H03F3/45 , H03F1/30
CPC分类号： G09G3/36 , H03F1/0205 , H03F1/303 , H03F3/45 , H03F3/45179 , H03F3/45183 , H03F3/45475 , H03F2203/45044 , H03F2203/45116 , H03F2203/45166
摘要： An amplifying circuit includes a first differential amplifier (first differential pair) and a second differential amplifier (second differential pair) having an input capacitance smaller than the first differential amplifier. The amplifying circuit switches between the first differential amplifier (first differential pair) and the second differential amplifier (second differential pair) in response to an amplification mode setting signal to perform amplification processing of an input signal.

8. 发明授权

US10713995B2 Output circuit, data line driver, and display device 有权
公开(公告)号：US10713995B2
公开(公告)日：2020-07-14
申请号：US15953972
申请日：2018-04-16
申请人： LAPIS SEMICONDUCTOR CO., LTD.
发明人： Hiroshi Tsuchi , Takeshi Nosaka , Koji Higuchi
IPC分类号： G09G3/20 , G09G3/36
摘要： An output circuit includes a differential amplifier including an inverting input terminal, non-inverting input terminals and an output terminal, and outputs, from the output terminal, a voltage having a level corresponding to a weighted average of respective input voltage levels of the non-inverting input terminals, when the output voltage level is equal to a input voltage level of the inverting input terminal, and outputs a voltage having a level corresponding to a difference between a level corresponding to a weighted average of the respective input voltage levels of the non-inverting input terminals and the input voltage level, when which the output voltage level is different from the input voltage level; and a delay circuit that generates a delay voltage responding with a predetermined time constant with respect to a change in the output voltage level and supplies the delay voltage to the inverting input terminal.

9. 发明授权

US10199000B2 Source driver IC chip 有权
公开(公告)号：US10199000B2
公开(公告)日：2019-02-05
申请号：US15395089
申请日：2016-12-30
申请人： LAPIS Semiconductor Co., Ltd.
发明人： Kenichi Shiibayashi , Koji Higuchi , Atsushi Hirama
IPC分类号： G09G3/36 , G06F3/038 , G09G5/00 , G09G5/10 , G09G3/34 , G09G3/3266 , G09G3/3258
摘要： A source driver IC chip, designed to prevent flicker in images displayed on a display panel while suppressing power consumption and heat generation, includes: a reference gradation voltage generating part (220) configured to generate a reference gradation voltage based on a first or second gamma characteristic of the display panel, using first and second power supply voltages (VH) and (VL) inputted through first and second external terminals (PA2, PA3); and a third external terminal (PA4) for externally outputting said reference gradation voltage. The source driver IC chip further includes first and second gradation voltage generating parts configured to generate first and second gradation voltages respectively, using a reference gradation voltage based on a first gamma characteristic inputted through a fourth external terminal and a reference gradation voltage having a second gamma characteristic inputted through a fifth external terminal respectively.

10. 发明授权

US09570011B2 Source driver IC chip 有权
标题翻译：源驱动IC芯片
公开(公告)号：US09570011B2
公开(公告)日：2017-02-14
申请号：US15194003
申请日：2016-06-27
申请人： LAPIS Semiconductor Co., Ltd.
发明人： Kenichi Shiibayashi , Koji Higuchi , Atsushi Hirama
IPC分类号： G09G5/10 , G09G3/32 , G09G3/36
CPC分类号： G09G3/3406 , G09G3/3258 , G09G3/3266 , G09G3/3614 , G09G3/3648 , G09G3/3666 , G09G3/3674 , G09G3/3685 , G09G3/3696 , G09G5/10 , G09G2300/04 , G09G2310/027 , G09G2310/0286 , G09G2310/0291 , G09G2310/0297 , G09G2310/08 , G09G2320/0247 , G09G2320/0276 , G09G2320/0626 , G09G2320/0666 , G09G2330/021 , G09G2370/08
摘要： A source driver IC chip, designed to prevent flicker in images displayed on a display panel while suppressing power consumption and heat generation, includes: a reference gradation voltage generating part (220) configured to generate a reference gradation voltage based on a first or second gamma characteristic of the display panel, using first and second power supply voltages (VH) and (VL) inputted through first and second external terminals (PA2, PA3); and a third external terminal (PA4) for externally outputting said reference gradation voltage. The source driver IC chip further includes first and second gradation voltage generating parts configured to generate first and second gradation voltages respectively, using a reference gradation voltage based on a first gamma characteristic inputted through a fourth external terminal and a reference gradation voltage having a second gamma characteristic inputted through a fifth external terminal respectively.
摘要翻译：一种源极驱动器IC芯片，用于在抑制功耗和发热的同时防止在显示面板上显示的图像的闪烁，包括：基准灰度电压产生部件，被配置为基于第一或第二伽玛产生参考灰度电压使用通过第一和第二外部端子（PA2，PA3）输入的第一和第二电源电压（VH）和（VL）的显示面板的特性; 和用于从外部输出所述基准灰度电压的第三外部端子（PA4）。源极驱动器IC芯片还包括第一和第二灰度电压产生部件，其被配置为使用基于通过第四外部端子输入的第一伽马特性的参考灰度电压和具有第二伽玛的参考灰度电压分别产生第一和第二灰度电压分别通过第五外部端子输入的特性。

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