公开(公告)号：US20200279528A1

公开(公告)日：2020-09-03

申请号：US16774743

申请日：2020-01-28

Applicant: JOLED INC.

Inventor： Toshiyuki KATO

IPC: G09G3/3233 ,  G09G3/3291 ,  H04N5/369

Abstract: A processing circuit processes video signals for a display device which includes a display panel including pixels each having a self light emitting element and a current limiting circuit limiting a current to the pixels. The processing circuit includes: a frame memory storing video signals of a previous frame; and a signal processer which: compares a luminance represented by a video signal of the current frame corresponding to a pixel and a luminance represented by a video signal of the previous frame corresponding to the pixel; outputs the video signal of the current frame in a case where the luminance represented by the video signal of the current frame is equal to or smaller than the luminance represented by the video signal of the previous frame or equal to or smaller than a predetermined threshold value; and outputs a weighted average of the video signal of the current frame and the video signal of the previous frame in any other case.

公开(公告)号：US20190027097A1

公开(公告)日：2019-01-24

申请号：US16009671

申请日：2018-06-15

Applicant: JOLED INC.

Inventor： Toshiyuki KATO

IPC: G09G3/3266 ,  G09G3/3275

CPC classification number: G09G3/3266 ,  G09G3/3225 ,  G09G3/3275 ,  G09G2310/0202 ,  G09G2320/0233 ,  G09G2320/045 ,  G09G2320/046 ,  G09G2340/0492 ,  G09G2354/00

Abstract: A signal processing circuit includes an accumulator circuit that accumulates display history information regarding light-emitting devices, and a detection circuit that detects the degree of deterioration of a display panel by the accumulated display history information and detects a rotation-recommended state of the display panel on the basis of the degree of deterioration. In the case where the display panel is divided into a plurality of blocks each including the same number of pixel circuits, the detection circuit detects the degree of deterioration for each of the blocks, and if the number of the blocks whose degrees of deterioration are greater than or equal to a first threshold value determined in advance is greater than or equal to a predetermined number, detects that the display panel is in the rotation-recommended state.

公开(公告)号：US20160148576A1

公开(公告)日：2016-05-26

申请号：US14942054

申请日：2015-11-16

Applicant: JOLED INC.

Inventor： Toshiyuki KATO

IPC: G09G3/32 ,  G09G3/20

CPC classification number: G09G3/3225 ,  G09G3/2007 ,  G09G2320/0276 ,  G09G2320/0673 ,  G09G2330/021 ,  G09G2330/028 ,  G09G2360/16

Abstract: A display device includes: pixel units; a source driver that applies, to data signal lines, voltages corresponding to gray-level values; and a control unit. Each of the pixel units includes: a light-emitting element that emits light according to a driving current; a capacitance element that accumulates charge corresponding to a voltage at a connected data signal line; and a driving transistor that is a P-channel transistor and supplies the driving current corresponding to the accumulated charge to the light-emitting element. The control unit decreases voltage(s) to be outputted from the source driver, when an appearance frequency of display pixels having a low gray-level value lower than or equal to a first reference value is lower than a first reference frequency, or when an appearance frequency of display pixels having a high gray-level value higher than or equal to a second reference value is lower than a second reference frequency.

Abstract translation: 显示装置包括：像素单元; 源驱动器，其向数据信号线施加对应于灰度值的电压; 和控制单元。 每个像素单元包括：根据驱动电流发光的发光元件; 电容元件，其累积与所连接的数据信号线上的电压对应的电荷; 以及驱动晶体管，其是P沟道晶体管，并且将与累积电荷相对应的驱动电流提供给发光元件。 当具有低于或等于第一参考值的低灰度值的显示像素的出现频率低于第一参考频率时，控制单元减小要从源驱动器输出的电压，或者当 具有高于或等于第二参考值的高灰度级的显示像素的出现频率低于第二参考频率。