LIQUID CRYSTAL DISPLAY DEVICE

• Main Author: YAMAGISHI SEIJI
• Format: Patent
• Language: English; Japanese
• Published: 26.03.2020
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DISPLAY; EDUCATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEALS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

To provide a liquid crystal display device capable of suppressing degradation in image quality due to disclination and achieving higher resolution by a pixel shift.SOLUTION: The liquid crystal display device includes: drive means to vary the transmittance or reflectance for light from a light source in each pixel by controlling an application time of a predetermined ON voltage/OFF voltage based on a gradation value of an image after application of a gradation conversion process to each pixel of a liquid crystal element; pixel shift image creation means to create a plurality of pixel shift images from an input image to give a time-division output; pixel shift means capable of shifting modulated light in a predetermined direction to display; gradation conversion means for applying a gradation conversion process of multiplying different gain coefficients to temporally continuous frame image data; and spatial frequency calculation means to calculate a spatial frequency from the pixel shift image. The gradation conversion means controls a difference in the gain coefficients to be multiplied in the gradation conversion process, based on the spatial frequency calculated by the spatial frequency calculation means.SELECTED DRAWING: Figure 12 【課題】ディスクリネーションによる画質低下を抑制し、画素シフトによる高解像度化を実現することができる。【解決手段】液晶表示装置であって、液晶素子の各画素に対して、階調変換処理を適用した後の画像の階調値に基づいて所定のＯＮ電圧／ＯＦＦ電圧の印加時間を制御することで、画素毎に光源の光の透過もしくは反射率を変化させる駆動手段と入力画像から複数の画素シフト用画像を生成し時分割で出力する画素シフト画像生成手段と、変調された光を所定の方向にシフトして表示可能な画素シフト手段と、時間的に連続するフレーム画像データに対して異なるゲイン係数を乗じる階調変換処理をそれぞれ適用する階調変換手段と、画素シフト用画像から空間周波数を算出する空間周波数算出手段と、を有し、階調変換手段は、空間周波数算出手段で算出された空間周波数に基づいて、階調変換処理で乗じるゲイン係数の差分を制御することを特徴とする。【選択図】図１２