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    • 8. 发明公开
    • LIGHT SOURCE DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE
    • 光源装置和液晶显示装置
    • EP2120511A1
    • 2009-11-18
    • EP08711386.6
    • 2008-02-15
    • Sony Corporation
    • OKABE, Mitsuru
    • H05B37/02G02F1/133H01L31/12H01L33/00
    • H01L31/14G09G3/3413G09G3/342G09G2310/0235G09G2320/064G09G2360/141H01L27/14H05B33/0818H05B33/0821H05B33/0869Y02B20/346
    • A light source device capable of improving detection precision of illuminated light in the light source device performing partial lighting operation is provided. In the case of lighting number variable operation mode, a backlight control section 12 exercises control so that a pulse width ΔT of the last pulse signal out of a plurality of pulse signals generated in one frame time period is a threshold value T2 (Tth) or less. In the case where the light emission luminance of a partial lighting section 4 is high (in the case where the width of the plurality of pulse signals is respectively wide), interference between a light receiving signal obtained in a partial lighting time period Δt1 and a light receiving signal obtained in the whole lighting time period Δt4 is able to be avoided. Therefore, variation of the signal value depending on detection timing of the obtained light receiving signal is avoided, and detection precision is improved.
    • 提供一种能够改善进行部分点亮操作的光源装置中的照明光的检测精度的光源装置。 在点亮数量可变操作模式的情况下,背光控制部分12进行控制,使得在一个帧时间段内生成的多个脉冲信号中的最后一个脉冲信号的脉冲宽度ΔT是阈值T2(Tth)或 减。 在部分发光部分4的发光亮度高(在多个脉冲信号的宽度分别宽的情况下)的情况下,在部分发光时间段Δt1内获得的光接收信号与在部分发光时间段Δt1内获得的光接收信号 能够避免在整个照明时间段Δt4内获得的光接收信号。 因此,避免了取决于所获得的光接收信号的检测定时的信号值的变化,并且提高了检测精度。
    • 9. 发明公开
    • PHOTOSENSOR, TARGET DETECTION METHOD AND DISPLAY PANEL
    • LICHTSENSOR UND ZIELDETEKTIONSVERFAHREN
    • EP2038932A1
    • 2009-03-25
    • EP07829771.0
    • 2007-10-09
    • Casio Computer Co., Ltd.
    • YAMAMOTO, Takumi
    • H01L27/146H01L31/14H01L31/0392
    • H01L27/14678G06F3/0421H01L31/14
    • A photosensor includes first and second light receiving elements (12, 16, 18) which detect light, and a light source which is disposed behind the first and second light receiving elements and which emits light containing a predetermined color component. A first filter (102) is disposed in front of the first light receiving element and transmits light of the predetermined color component, and a second filter (104) is disposed in front of the second light receiving element and shuts off the light of the predetermined color component and transmits a color component other than the predetermined color component. A judging section judges whether or not a detection target is present in front of the first (102) and second filters (104) in accordance with outputs from the first and second light receiving elements (12, 16, 18).
    • 光传感器包括检测光的第一和第二光接收元件和设置在第一和第二光接收元件后面并且发射含有预定颜色分量的光的光源。 第一滤光器设置在第一光接收元件的前面并透射预定颜色分量的光,并且第二滤光器设置在第二光接收元件的前面,并且切断预定颜色分量的光并透射颜色 除了预定的颜色分量。 判断部分根据来自第一和第二光接收元件的输出来判断检测目标是否存在于第一和第二滤光器的前面。