To provide an abnormality detection circuit that can detect abnormality in a liquid crystal display without using a special liquid crystal display panel.SOLUTION: An abnormality detection circuit comprises: a plurality of voltage dividing circuits; a first selector that selects and outputs one of the outputs from the plurality of pressure dividing circuits; a first comparator that compares the output from the first selector with a reference voltage; and a first detection unit that detects abnormality on the basis of an output from the first comparator. The selection made by the first selector is switched in synchronization with a vertical synchronization signal or a horizontal synchronization signal of the liquid crystal display.SELECTED DRAWING: Figure 3

    【課題】特殊な液晶表示パネルを用いずに液晶表示装置の異常を検知することができる異常検知回路を提供する。【解決手段】異常検知回路は、複数の分圧回路と、前記複数の分圧回路の各出力から一つを選択して出力する第1セレクタと、前記第1セレクタの出力と基準電圧とを比較する第1コンパレータと、前記第1コンパレータの出力に基づき異常を検知する第1検知部と、を備える。液晶表示装置の垂直同期信号又は水平同期信号に同期して前記第1セレクタの選択が切り替わる。【選択図】図3


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    Title :

    ABNORMALITY DETECTION CIRCUIT


    Additional title:

    異常検知回路


    Contributors:

    Publication date :

    2020-01-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G09G Anordnungen oder Schaltungen zur Steuerung oder Regelung von Anzeigevorrichtungen mit statischen Mitteln zur Darstellung veränderlicher Informationen , ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / G02F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING,... , Vorrichtungen oder Anordnungen, deren optische Arbeitsweise durch Änderung der optischen Eigenschaften des Mediums der Vorrichtungen oder Anordnungen geändert wird zum Steuern der Intensität, Farbe, Phase, Polarisation oder der Richtung von...



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