公开(公告)号：US20200273395A1

公开(公告)日：2020-08-27

申请号：US15930011

申请日：2020-05-12

申请人： Synaptics Japan GK

发明人： Hirobumi FURIHATA ,  Tomoo MINAKI

IPC分类号： G09G3/20

摘要： A system and method for rendering subpixels comprising performing an eight-color halftoning process on the second image data to generate third image data which describe a grayscale value of each of an R subpixel, a G subpixel and a B subpixel of each pixel with one bit, generating the third image data by performing a dithering process on the second image data using a dither value selected from elements of the dither table, when the third image data associated with a pixel of interest of the display panel is generated, and driving the display panel in response to the third image data.

公开(公告)号：US11092991B2

公开(公告)日：2021-08-17

申请号：US15876503

申请日：2018-01-22

申请人： Synaptics Japan GK

发明人： Yasuhiko Sone

IPC分类号： G05F3/26

摘要： A voltage generator circuitry includes first to third bipolar transistors having commonly-connected base electrodes, first and second current mirror circuitries, first and second differential amplifiers; a first resistor; and a current-voltage conversion circuitry. The first current mirror circuitry supplies currents to the first to third bipolar transistors and to the current-voltage conversion circuitry. The second current mirror circuitry supplies currents to the first to third bipolar transistors, and s to the current-voltage conversion circuitry. The first and second differential amplifiers control the first and second current mirror. The current-voltage conversion circuitry converts a sum current of the first and second currents into an output voltage.

公开(公告)号：US10916176B2

公开(公告)日：2021-02-09

申请号：US16046478

申请日：2018-07-26

申请人： Synaptics Japan GK

发明人： Kota Kitamura ,  Makoto Kimura

IPC分类号： G09G3/3225 ,  G09G3/36 ,  G09G3/3275 ,  G09G3/20

摘要： A display driver includes a plurality of source amplifiers configured to drive a plurality of source lines of a display panel, and an amplifier control system configured to control the source amplifiers. Each of the source amplifiers is configured to drive a source line with a drive voltage corresponding to a grayscale value specified by an image data associated with each of the source amplifiers. The amplifier control system is configured to control execution and stopping of an amplifying operation of each of the source amplifiers based on the image data associated with each of the source amplifiers is a grayscale value corresponding to black portions of the display panel.

公开(公告)号：US10522067B2

公开(公告)日：2019-12-31

申请号：US15911876

申请日：2018-03-05

申请人： Synaptics Japan GK

发明人： Akio Sugiyama ,  Takashi Nose ,  Hirobumi Furihata

IPC分类号： G09G3/20

摘要： A display panel driver includes an image data generator, a brightness correction circuit performing a correction calculation on image data, a drive section driving the display panel in response to corrected image data; and a display timing generator outputting a timing control signal. The correction calculation by the brightness correction circuit is adjustable. When the display panel driver is placed into a test mode, the display timing generator is configured to output an internally-generated timing control signal and the image data generator outputs internally-generated evaluation image data. The evaluation image data are generated so that the evaluation images are switched from one to another in response to the internally-generated timing control signal.

公开(公告)号：US10373584B2

公开(公告)日：2019-08-06

申请号：US15605514

申请日：2017-05-25

申请人： Synaptics Japan GK

发明人： Masao Orio ,  Hirobumi Furihata ,  Susumu Saito ,  Takashi Nose ,  Akio Sugiyama

IPC分类号： G09G5/02

摘要： A color adjustment circuit includes: a correction processing circuit configured to generate an output image data by performing color adjustment correction on an input image data; and a correction factor calculation circuit configured to calculate correction factors used for the color adjustment correction. The correction factor calculation circuit calculates a white color distance, a complementary color distance, and an elementary color distance and calculates the correction factors based on the white color distance, the complementary color distance and the elementary color distance. The correction factors are calculated based on: white point correction parameters, top correction parameters, and intermediate correction parameters. The intermediate correction parameters are defined to control the R, G, and B grayscale values of the output image data for the case when the input image data corresponds to each of elementary colors R, G, and B, and complementary colors C, M, and Y of an intermediate grayscale value.

公开(公告)号：US10152921B2

公开(公告)日：2018-12-11

申请号：US15456181

申请日：2017-03-10

申请人： Synaptics Japan GK

发明人： Toshiyuki Hikichi ,  Shinobu Nohtomi

IPC分类号： G09G3/32 ,  G09G3/36 ,  G09G3/3258

摘要： a display driver is provided which drives a display panel. The display driver includes first and second buffer amplifiers associated with first and second pixels positioned adjacent in a horizontal direction; first and second connection switches; and a controller. Each of the first and second buffer amplifiers includes: a differential input circuit including a MOS transistor pair, first and second drain interconnections; an active load circuit connected to the first and second drain interconnections; and an output stage. The first connection switch is connected between the output nodes of the first and second buffer amplifiers. The second connection switch is connected between the first drain interconnections of the first and second buffer amplifiers. The controller controls the first and second switches in response to image data associated with the first and second pixels.

公开(公告)号：US10135444B2

公开(公告)日：2018-11-20

申请号：US15333709

申请日：2016-10-25

申请人： Synaptics Japan GK

发明人： Yutaka Saeki

IPC分类号： H02M3/07 ,  H03K19/0175 ,  H03K19/0185

摘要： The booster precharges a boost-voltage-output terminal to a predetermined voltage before voltage-boosting start by a charge-pump circuit in the booster. While alternately switching one capacitive electrode of a pumping capacitance between first and second voltages, the charge-pump circuit periodically applies a third voltage to the other capacitive electrode, in which the voltage is boosted by lifting up the third voltage each switching. The resultant boost voltage is successively supplied to a stabilization capacitance through a MOS switch circuit for output. Thus, a boost voltage boosted to a sum voltage of the second and third voltages can be obtained. Using a precharge voltage produced by the precharge circuit in the booster as the third voltage can make a MOS switch circuit operable to supply the third voltage and the MOS switch circuit for boost voltage output smaller than a voltage under the sum voltage of the second and third voltages.

公开(公告)号：US09911371B2

公开(公告)日：2018-03-06

申请号：US14157415

申请日：2014-01-16

申请人： Synaptics Japan GK

发明人： Akio Sugiyama ,  Takashi Nose ,  Hirobumi Furihata

IPC分类号： G09G3/20

CPC分类号： G09G3/20 ,  G09G2320/0626 ,  G09G2320/0666 ,  G09G2320/0693 ,  G09G2360/145 ,  G09G2360/16

摘要： A display panel driver includes an image data generator, a brightness correction circuit performing a correction calculation on image data, a drive section driving the display panel in response to corrected image data; and a display timing generator outputting a timing control signal. The correction calculation by the brightness correction circuit is adjustable. When the display panel driver is placed into a test mode, the display timing generator is configured to output an internally-generated timing control signal and the image data generator outputs internally-generated evaluation image data. The evaluation image data are generated so that the evaluation images are switched from one to another in response to the internally-generated timing control signal.

公开(公告)号：US09837027B2

公开(公告)日：2017-12-05

申请号：US14972660

申请日：2015-12-17

申请人： Synaptics Japan GK

发明人： Akihito Kumamoto ,  Kazuo Nishimae

IPC分类号： G01R31/28 ,  G09G3/36 ,  G09G3/00 ,  G01R31/317

CPC分类号： G09G3/36 ,  G01R31/31724 ,  G09G3/006

摘要： The semiconductor device cyclically outputs given status information pieces according to a predetermined procedure from a test output terminal one by one on receipt of a test enable direction through a test enable terminal, and outputs the same status information pieces as those output at that time from the test output terminal without interruption on receipt of a test disable direction. Operating the test enable terminal, the semiconductor device cyclically outputs status information pieces without the need for initial setting and further, outputs only desired status information without interruption.

公开(公告)号：US09811219B2

公开(公告)日：2017-11-07

申请号：US14581810

申请日：2014-12-23

申请人： Synaptics Japan GK

发明人： Takayuki Noto

IPC分类号： G09G5/00 ,  G06F3/044 ,  G06F3/041

CPC分类号： G06F3/044 ,  G06F3/0412 ,  G06F3/0418

摘要： A touch panel control circuit includes a plurality of drive circuits which are connected to Y sensor electrodes, respectively, and which apply a plurality of pulses to a corresponding Y sensor electrode for every predetermined period, and a plurality of detection circuits which are connected to X sensor electrodes, respectively. Each of the detection circuits includes a switched capacitor circuit that continues sampling of a signal from each of the X sensor electrodes, to which the detection circuits are connected, not only at a timing that is in synchronization with the plurality of pulses that are applied to the Y sensor electrodes, but also at a timing at which the pulses are not applied to the Y sensor electrodes. For example, the switched capacitor circuit is an integration circuit, or an integration circuit with a finite impulse response (FIR) filter or an infinite impulse response (IIR) filter.