公开(公告)号：US20190037188A1

公开(公告)日：2019-01-31

申请号：US16071461

申请日：2016-12-19

Applicant: IIX INC.

Inventor： Makoto Hatakenaka ,  Takashi Sakamoto ,  Keisuke Okada

IPC: H04N9/69 ,  G09G3/36 ,  G09G3/3233

Abstract: An unevenness correction system according to the present invention includes a panel drive circuit provided with a gamma correction circuit that performs gamma correction on an image signal input to an input interface, a gamma correction information acquisition circuit that acquires a gamma correction signal obtained through gamma correction as gamma correction information, an unevenness correction circuit that performs an unevenness correction on the gamma correction signal based on correction data, and an output interface that externally outputs the gamma correction information, and an unevenness correction apparatus provided with a pattern generator that outputs the image signal of a predetermined image to the input interface, and a control unit that generates correction data based on gamma correction information of each individual display panel input to and read by a gamma correction information reading unit from the output interface regarding the output image signal.

公开(公告)号：US11823610B2

公开(公告)日：2023-11-21

申请号：US17912985

申请日：2021-02-25

Applicant: IIX INC.

Inventor： Makoto Hatakenaka ,  Takashi Sakamoto ,  Yoshihide Minegishi ,  Ryohei Hatta ,  Norimasa Senda

IPC: G09G3/20

CPC classification number: G09G3/2074 ,  G09G2300/0452 ,  G09G2310/08 ,  G09G2330/021

Abstract: An input signal correction device includes an input circuit, extension circuit, degenerate circuit, separation circuit, recovery circuit and delay adjustment circuit that operate at an operating frequency f, demura circuit that operates at an operating frequency f/2, and adder circuit. The extension circuit extends the period of R and B input signals by a factor of 2 and outputs preprocessing signals, the degenerate circuit degenerates a G input signal, the demura circuit corrects preprocessing signals from the extension and degenerate circuits and outputs correction signals, the separation circuit reduces the period of the R and B correction signals to ½ and outputs differential signals, recovery circuit reduces the period of G correction signal to ½ and outputs the same differential signal over two periods, the delay adjustment circuit delays the input and output signals, and the adder circuit adds the differential signals to the delay signals and outputs output signals.

公开(公告)号：US10750148B2

公开(公告)日：2020-08-18

申请号：US16071461

申请日：2016-12-19

Applicant: IIX INC.

Inventor： Makoto Hatakenaka ,  Takashi Sakamoto ,  Keisuke Okada

IPC: H04N9/69 ,  G09G3/20 ,  G09G3/36 ,  G09G3/3233

Abstract: An unevenness correction system according to the present invention includes a panel drive circuit provided with a gamma correction circuit that performs gamma correction on an image signal input to an input interface, a gamma correction information acquisition circuit that acquires a gamma correction signal obtained through gamma correction as gamma correction information, an unevenness correction circuit that performs an unevenness correction on the gamma correction signal based on correction data, and an output interface that externally outputs the gamma correction information, and an unevenness correction apparatus provided with a pattern generator that outputs the image signal of a predetermined image to the input interface, and a control unit that generates correction data based on gamma correction information of each individual display panel input to and read by a gamma correction information reading unit from the output interface regarding the output image signal.

公开(公告)号：US12148402B2

公开(公告)日：2024-11-19

申请号：US18279152

申请日：2021-03-10

Applicant: IIX INC.

Inventor： Makoto Hatakenaka ,  Takashi Sakamoto ,  Mitsuo Hagiwara ,  Norimasa Senda ,  Yoshihide Minegishi ,  Hiroshi Murase

IPC: G09G3/36

Abstract: A panel drive circuit having an input interface to which an image signal is input, a gamma correction circuit that corrects an image processing signal generated by an image processing circuit performing image processing on the image signal input to the input interface, such that a gamma correction signal thus generated has predetermined gamma characteristics, an unevenness correction circuit that corrects the gamma correction signal generated through the correction by the gamma correction circuit, based on correction data for reducing unevenness of a display panel, and an D/A convertor that has a variable output voltage range, and performs D/A conversion on an unevenness correction signal generated through the correction by the unevenness correction circuit and outputs the signal thus generated to the display panel, and the unevenness correction circuit changes the correction method according to the output voltage range of the D/A convertor.

公开(公告)号：US11990104B2

公开(公告)日：2024-05-21

申请号：US18028370

申请日：2021-02-25

Applicant: IIX INC.

Inventor： Makoto Hatakenaka ,  Takashi Sakamoto ,  Yoshihide Minegishi ,  Ryohei Hatta ,  Norimasa Senda

IPC: G09G5/04

CPC classification number: G09G5/04 ,  G09G2300/0452 ,  G09G2330/08 ,  G09G2330/10

Abstract: An input signal correction device for reducing power consumption is compatible with a variety of display panels, and includes an input circuit, extension/degeneration circuit, separation/recovery circuit and delay adjustment circuit operating at frequency f, demura circuit operating at frequency f/2, and adder circuit. The extension/degeneration circuit outputs a preprocessing signal increasing the input signal cycle length by 2 or outputs by degenerating the input signal to ½, based on a control signal, the demura circuit outputs a correction signal correcting the preprocessing signal from the extension/degeneration circuit, the separation/recovery circuit outputs a differential signal reducing the correction signal cycle length to ½ or reduces cycle length to ½ and outputs the same differential signal over two cycles, based on a control signal, the delay adjustment circuit outputs a delay signal delaying the input signal, and the adder circuit outputs a signal adding the differential signal to the delay signal.

公开(公告)号：US12159605B2

公开(公告)日：2024-12-03

申请号：US18271594

申请日：2021-02-04

Applicant: IIX INC.

Inventor： Makoto Hatakenaka ,  Takashi Sakamoto ,  Hiroshi Murase ,  Mitsuo Hagiwara ,  Hideaki Suzuki ,  Kazunori Yoshizawa

IPC: G09G5/10 ,  G09G5/02

Abstract: An unevenness correction data generation device suppressing the appearance of color unevenness when turning on R, G and B together includes a pattern generation unit causing red, green and blue images, in which display panel subpixels are turned on at the same gray level, to be displayed, a monochrome camera, a control unit generating first red, green and blue luminance correction data based on shooting data of the monochrome camera, a pattern generation unit causing the display panel to display a white image by causing red, green and blue images corrected with the respective luminance correction data to be displayed simultaneously, a color camera shooting the white image in color, and a control unit generating color correction data for correcting color unevenness based on shooting data of the color camera and generates unevenness correction data based on the red, green and blue luminance correction data and the color correction data.