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公开(公告)号：US11774812B2
公开(公告)日：2023-10-03
申请号：US17698158
申请日：2022-03-18
Applicant: Japan Display Inc.
Inventor： Masashi Mitsui , Takeo Koito , Tae Kurokawa
IPC: G02F1/1347 , G02F1/1343 , G02F1/1335
CPC classification number: G02F1/1347 , G02F1/133528 , G02F1/134318
Abstract: According to one embodiment, an optical control device includes a first liquid crystal cell and a second liquid crystal cell. The second liquid crystal cell is stacked on the first liquid crystal cell. The first liquid crystal cell has a function of modulating and converting a first polarization component of incident light into a second polarization component, and hardly modulating and converting a third polarization component of incident light into a fourth polarization component. The second liquid crystal cell has a function of hardly modulating the second polarization component transmitted through the first liquid crystal cell, and modulating the fourth polarization component transmitted through the first liquid crystal cell.
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公开(公告)号：US10509268B2
公开(公告)日：2019-12-17
申请号：US15943890
申请日：2018-04-03
Applicant: Japan Display Inc.
Inventor： Tae Kurokawa , Kentaro Okuyama , Takayuki Imai
IPC: G02F1/1343 , G02F1/1334 , G02F1/1335 , G09G3/34
Abstract: According to an aspect, a display device includes: a first translucent substrate; a second translucent substrate facing the first translucent substrate; a liquid crystal layer including polymer dispersed liquid crystal sealed between the first translucent substrate and the second translucent substrate; at least one light emitter facing at least one of a side surface of the first translucent substrate or a side surface of the second translucent substrate; and a display controller that controls transmittance of light passing through the first translucent substrate and the second translucent substrate. A non-light-emitting period in which the at least one light emitter does not emit light is provided between a plurality of light-emitting periods in which the at least one light emitter emits light.
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公开(公告)号：US20190197968A1
公开(公告)日：2019-06-27
申请号：US16218555
申请日：2018-12-13
Applicant: Japan Display Inc.
Inventor： Tenfu NAKAMURA , Kentaro Okuyama , Tae Kurokawa
IPC: G09G3/34 , G02F1/1334 , G02F1/1335
CPC classification number: G09G3/3413 , G02F1/1334 , G02F1/133602 , G09G2310/0235 , G09G2310/08 , G09G2320/0271 , G09G2320/0626 , G09G2320/0633 , G09G2320/064 , G09G2320/0646 , G09G2360/16
Abstract: According to one embodiment, a display device including a plurality of light sources of different luminous colors, a first substrate, a second substrate opposed to the first substrate, a liquid crystal layer interposed between the first and second substrates, to which light from the light sources enters, a display area on which an image is displayed, and a drive circuit configured to control quantity of light from each of the light sources on the basis of an analyzation result of an image signal used to display the image.
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公开(公告)号：US09978339B2
公开(公告)日：2018-05-22
申请号：US15648177
申请日：2017-07-12
Applicant: Japan Display Inc.
Inventor： Kojiro Ikeda , Toshiyuki Nagatsuma , Masaaki Kabe , Amane Higashi , Tae Kurokawa , Fumitaka Gotoh , Akira Sakaigawa
CPC classification number: G09G5/10 , G09G3/3607 , G09G3/3648 , G09G5/02 , G09G2300/0452 , G09G2340/0457 , G09G2340/06 , G09G2360/16
Abstract: A display device includes a signal processing unit that receives input signals, and calculates output signals to a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel. The signal processing unit calculates a frequency of pixels belonging to each of a plurality of partitions using a light quantity of a surface light source. The signal processing unit calculates an index value for each of the partitions by at least multiplying the cumulative frequency being obtained by sequentially adding the frequency of pixels from a partition having the maximum light quantity among the partitions, and the number of partitions representing a position of a partition to which the cumulative frequency belongs counted from the partition having the maximum light quantity. The signal processing unit controls luminance of the surface light source based on a partition in which the index value exceeds a threshold.
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公开(公告)号：US09214118B2
公开(公告)日：2015-12-15
申请号：US14505145
申请日：2014-10-02
Applicant: Japan Display Inc.
Inventor： Fumitaka Gotoh , Tsutomu Harada , Masaaki Kabe , Tae Kurokawa , Kojiro Ikeda , Toshiyuki Nagatsuma , Akira Sakaigawa , Naoyuki Takasaki , Amane Higashi
CPC classification number: G09G3/3607 , G09G5/10 , G09G2300/0452
Abstract: A display device includes: an image display unit that includes a plurality of main pixels in an image display region, the image display unit including sub-pixels; a light source that irradiates the image display region; a light source control unit that controls luminance of the light source; and a color information correction processing unit that corrects first color information that is obtained based on the luminance of the light source and an input video signal to second color information, when color information of at least one of a red pixel, a green pixel, and a blue pixel included in the first color information exceeds a predetermined threshold, the second information is corrected by degenerating color information of the red pixel, the green pixel, and the blue pixel, and by adding color information of the white pixel included in the first color information based on the degenerated color information.
Abstract translation: 显示装置包括：图像显示单元，其包括图像显示区域中的多个主要像素，所述图像显示单元包括子像素; 照射图像显示区域的光源; 光源控制单元，其控制所述光源的亮度; 以及颜色信息校正处理单元，当将红色像素，绿色像素以及绿色像素中的至少一种的颜色信息作为颜色信息时，将基于光源的亮度和输入视频信号的亮度获得的第一颜色信息校正为第二颜色信息 包括在第一颜色信息中的蓝色像素超过预定阈值，通过对红色像素，绿色像素和蓝色像素的颜色信息进行退化来校正第二信息，并且通过将包括在第一颜色信息中的第一颜色信息中的白色像素的颜色信息相加 基于退化颜色信息的颜色信息。
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Patent Agency Ranking
公开(公告)号：US20150310830A1
公开(公告)日：2015-10-29
申请号：US14692957
申请日：2015-04-22
Applicant: Japan Display Inc.
Inventor： Kojiro Ikeda , Toshiyuki Nagatsuma , Masaaki Kabe , Amane Higashi , Tae Kurokawa , Fumitaka Gotoh , Akira Sakaigama
CPC classification number: G09G5/10 , G09G3/3607 , G09G3/3648 , G09G5/02 , G09G2300/0452 , G09G2340/0457 , G09G2340/06 , G09G2360/16
Abstract: A display device includes a signal processing unit that receives input signals, and calculates output signals to a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel. The signal processing unit calculates a frequency of pixels belonging to each of a plurality of partitions using a light quantity of a surface light source. The signal processing unit calculates an index value for each of the partitions by at least multiplying the cumulative frequency being obtained by sequentially adding the frequency of pixels from a partition having the maximum light quantity among the partitions, and the number of partitions representing a position of a partition to which the cumulative frequency belongs counted from the partition having the maximum light quantity. The signal processing unit controls luminance of the surface light source based on a partition in which the index value exceeds a threshold.
Abstract translation: 显示装置包括信号处理单元，其接收输入信号，并计算到第一子像素，第二子像素，第三子像素和第四子像素的输出信号。 信号处理单元使用面光源的光量来计算属于多个分区中的每一个的像素的频率。 所述信号处理单元通过以下方式来计算每个所述分区的索引值：至少乘以通过从所述分区之中具有最大光量的分区依次添加所述像素的频率而获得的累积频率， 从具有最大光量的分区计数累积频率所属的分区。 信号处理单元基于指标值超过阈值的分区来控制表面光源的亮度。
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7.发明申请公开(公告)号：US20150310828A1
公开(公告)日：2015-10-29
申请号：US14682520
申请日：2015-04-09
Applicant: Japan Display Inc.
Inventor： Fumitaka Gotoh , Tsutomu Harada , Toshiyuki Nagatsuma , Akira Sakaigawa , Masaaki Kabe , Tae Kurokawa , Kojiro Ikeda
CPC classification number: G09G3/3406 , G09G2320/064 , G09G2320/0646
Abstract: Provided are a display apparatus and an illumination apparatus including: a light source; a time division control unit that performs a time division operation on a value represented by a first luminance control signal of a first bit number for controlling luminance of the light source to generate second luminance control signals each having a second bit number that is smaller than the first bit number and generates third luminance control signals each having a pulse width that corresponds to one of the values represented by the second luminance control signals; and a drive unit that generates drive signals for causing the light source to emit light on the basis of the third luminance control signals and supplies the drive signals to the light source.
Abstract translation: 提供一种显示装置和照明装置，包括：光源; 时分控制单元，对由第一位数的第一亮度控制信号表示的值进行时分运算，用于控制光源的亮度，以产生第二亮度控制信号，每个第二亮度控制信号的第二位数小于 产生第一亮度控制信号，每个具有对应于由第二亮度控制信号表示的值之一的脉冲宽度的第三亮度控制信号; 以及驱动单元，其产生用于使光源基于第三亮度控制信号发光的驱动信号，并将驱动信号提供给光源。
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公开(公告)号：US20140285539A1
公开(公告)日：2014-09-25
申请号：US14223306
申请日：2014-03-24
Applicant: JAPAN DISPLAY INC.
Inventor： Tae Kurokawa , Akira Sakaigawa , Masaaki Kabe , Masashi Mitsui , Kojiro Ikeda , Fumitaka Goto , Amane Higashi , Hirokazu Tatsuno , Toshiyuki Nagatsuma , Hiroki Uchiyama
CPC classification number: G09G3/3406 , G06F1/32 , G06F1/3265 , G09G3/3607 , G09G3/3648 , G09G2320/0242 , G09G2320/0646 , G09G2340/06 , Y02D10/153
Abstract: According to an aspect, a display device includes: an image display panel; a color conversion device including a signal processing unit and a signal output unit; a planar light-source device; and a light-source-device control unit. The signal processing unit includes a color conversion circuit that converts an input signal in a reference color area into a converted input signal generated in a definition color area where a chromaticity point of at least one of a first color, a second color, and a third color is inside of a reference color area, and a four-color generation circuit that generates an output signal and a light-source-device control signal from the converted input signal. The signal output unit outputs the drive signal to each sub-pixel based on the output signal. The light-source-device control unit outputs a drive voltage for emitting white light on the planar light-source device based on the light-source-device control signal.
Abstract translation: 根据一方面，一种显示装置包括：图像显示面板; 颜色转换装置，包括信号处理单元和信号输出单元; 平面光源装置; 以及光源装置控制部。 信号处理单元包括将参考色区域中的输入信号转换为定义色区域中生成的转换输入信号的颜色转换电路，其中第一颜色，第二颜色和第三色彩中的至少一个的色度点 颜色在参考颜色区域内，以及四色生成电路，其从转换的输入信号生成输出信号和光源装置控制信号。 信号输出单元基于输出信号将驱动信号输出到每个子像素。 光源装置控制部基于光源装置控制信号，在平面光源装置上输出用于发出白光的驱动电压。
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公开(公告)号：US12163642B2
公开(公告)日：2024-12-10
申请号：US18517560
申请日：2023-11-22
Applicant: Japan Display Inc.
Inventor： Kojiro Ikeda , Takeo Koito , Tae Kurokawa , Keiji Takizawa
Abstract: A lighting device includes a light emitting module and an optical element including first and second liquid crystal cells. Each of the first and second liquid crystal cells includes first and second transparent electrodes extending in a first direction and third and fourth transparent electrodes extending in a second direction. The light emitting module includes a light source, a light guide plate including an end surface into which light emitted from the light source is incident and a first surface from which the light incident into the end surface is emitted, and a prism sheet disposed opposite to the first surface. The second substrate of the first liquid crystal cell and the first substrate of the second liquid crystal cell are adjacent to each other. The first surface includes a plurality of first grooves extending in a third direction intersecting the first direction and the second direction.
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公开(公告)号：US12140306B2
公开(公告)日：2024-11-12
申请号：US18231297
申请日：2023-08-08
Applicant: Japan Display Inc.
Inventor： Tae Kurokawa , Takeo Koito , Kojiro Ikeda
IPC: F21V9/40 , G02F1/1343 , G02F1/1347
Abstract: An optical element includes a first liquid crystal cell and a second liquid crystal cell. The first liquid crystal cell and the second liquid crystal cell are stacked. Each of the first liquid crystal cell and the second liquid crystal cell includes a first substrate on which a first transparent electrode and a second transparent electrode are alternately and repeatedly arranged in a first direction, a second substrate on which a third transparent electrode and a fourth transparent electrode are alternately and repeatedly arranged in a second direction intersecting the first direction, and a liquid crystal layer between the first substrate and the second substrate. The second substrate of the first liquid crystal cell and the first substrate of the second liquid crystal cell are adjacent to each other.
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