DISPLAY DEVICE

• Main Authors: YOSHIOKA MASAKI, HASHIGAKI KOICHI, MATSUO SEIYA
• Format: Patent
• Language: English; Japanese
• Published: 10.08.2021
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; BASIC ELECTRIC ELEMENTS; CRYPTOGRAPHY; DISPLAY; EDUCATION; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; PHYSICS; SEALS; SEMICONDUCTOR DEVICES

To improve the display quality in a case of performing concentrated driving type pixel driving.SOLUTION: A display device includes a plurality of pixel circuits disposed in at least one direction, a plurality of signal lines that supply signal voltage according to gradation to the pixel circuits, a voltage output unit that generates ramp wave voltage whose voltage level changes according to time, a ramp wire that supplies the ramp wave voltage generated in the voltage output unit, a plurality of voltage holding units that are connected between the ramp wire and the signal lines, hold the ramp wave voltage at the timing according to the luminance of the pixel circuits, and generate the signal voltage, a plurality of correction current sources that supply correction current to a plurality of connection routes between the ramp wire and the voltage holding units, and a current adjustment unit that adjusts the correction current on the basis of the voltage difference in a predetermined connection route when predetermined luminance is set to the pixel circuit connected to the predetermined connection route in the case where the correction current is, or is not, supplied from the correction current sources to the connection routes.SELECTED DRAWING: Figure 1 【課題】集中駆動方式の画素駆動を行う場合の表示品質を向上する。【解決手段】表示装置は、少なくとも一方向に配置される複数の画素回路と、複数の画素回路に、階調に応じた信号電圧を供給する複数の信号線と、電圧レベルが時間に応じて変化するランプ波電圧を生成する電圧出力部と、電圧出力部で生成されたランプ波電圧を供給するランプ配線と、ランプ配線と複数の信号線との間に接続され、複数の画素回路の輝度に応じたタイミングでランプ波電圧を保持して信号電圧を生成する複数の電圧保持部と、ランプ配線と複数の電圧保持部との複数の接続経路に補正電流を供給する複数の補正電流源と、複数の補正電流源から補正電流を複数の接続経路に流す場合と流さない場合とにおいて、所定の接続経路に繋がる画素回路に所定の輝度を設定する際の所定の接続経路での電圧差に基づいて、補正電流を調整する電流調整部と、を備える。【選択図】図１