DISPLAY DEVICE AND SIGNAL PROCESSING METHOD

• Main Authors: OKADA TAKUYA, NAKADA MITSURU, USUI TAKEMASA
• Format: Patent
• Language: English; Japanese
• Published: 31.07.2023
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DISPLAY; DISPLAYING; EDUCATION; ELECTRICITY; LABELS OR NAME-PLATES; PHYSICS; SEALS; SIGNS

To obtain compensation data with less sensing operation and smaller memory use.SOLUTION: A display device in which each pixel of a plurality of pixels includes a driving TFT connected to a current drive type display element comprises: a driving section that applies measurement voltage different for each pixel to a control electrode of each driving TFT; a sensing section for sampling and sensing an amount of current flowing through each driving TFT by applying the measurement voltage; a calculation section that obtains a temporal variation amount of voltage between two main electrodes of each driving TFT using the amount of current flowing through each driving TFT and the measurement voltage, selects a pixel for obtaining electrical characteristics of a driving TFT of one pixel included in the plurality of pixels using the variation amount, and obtains the electrical characteristics using the amount of current flowing through the driving TFT of selected pixel and the measurement voltage; and a data compensation section for converting image data on one pixel on the basis of a change in the electrical characteristics.SELECTED DRAWING: Figure 5 【課題】より少ないセンシング動作、少ないメモリ使用量により補償データを求めることを可能とする。【解決手段】複数の画素の各画素が、電流駆動型表示素子に接続された駆動用ＴＦＴを含む表示装置において、各駆動用ＴＦＴの制御電極に、画素ごとに異なる測定電圧を印加する駆動部と、測定電圧を印加することで、各駆動用ＴＦＴを流れる電流量をサンプリングしてセンシングするセンシング部と、各駆動用ＴＦＴを流れた電流量と測定電圧とを用いて、各駆動用ＴＦＴの２つの主電極間の電圧の時間的な変動量を求め、変動量を用いて、複数の画素に含まれる一つの画素の駆動用ＴＦＴの電気的特性を求めるための画素を選別し、選別された画素の駆動用ＴＦＴを流れた電流量と測定電圧とを用いて電気的特性を求める計算部と、電気的特性の変化に基づいて、一つの画素についての画像データを変換するためのデータ補償部と、を備える。【選択図】図５