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    • 11. 发明公开
    • SHIFT REGISTER UNIT, GATE DRIVING CIRCUIT AND DRIVING METHOD, AND DISPLAY APPARATUS
    • EP3411869A1
    • 2018-12-12
    • EP16834223.6
    • 2016-08-12
    • BOE Technology Group Co., Ltd.
    • ZHENG, HaoliangHAN, SeungwooYAO, XingCHOI, HyunsicSHANG, GuangliangHAN, MingfuIM, YunsikJUN, JungmokDONG, Xue
    • G09G3/20G11C19/28
    • G11C19/28G09G3/20G09G3/3677G09G3/3688G09G2310/0267G09G2310/0286G11C19/184H01L27/1222H01L27/124H01L27/1251
    • The present application discloses a method of driving a gate driving circuit in an operation cycle divided into a first sub-cycle and a second sub-cycle, including providing a gate driving circuit having a first plurality of shift register units with a second plurality of shift register units, the first plurality of shift register units being configured so that each odd/even numbered shift register unit includes a first bias-control terminal to receive a first/second bias signal CLK1/CLK2, a second bias-control terminal to receive a second/first bias signal CLK2/CLK1, and a first control level terminal provided with a first control voltage VC1, the second plurality of shift register units being configured so that each odd/even numbered shift register unit includes a third bias-control terminal to receive a third/fourth bias signal CLK3/CLK4, a fourth bias-control terminal to receive a fourth/third bias signal CLK4/CLK3, and a second control level terminal provided with a second control voltage VC2; configuring the first bias signal CLK1 and the second bias signal CLK2 as first pair of clock signals at respective turn-on level and turn-off level with inverted phase in the first sub-cycle; setting the first control voltage VC1 to a turn-off level so that the first plurality of shift register units is controlled along with the first pair of clock signals to respectively output corresponding gate driving output signals in an output phase within the first sub-cycle; setting both the third bias signal CLK3 and the fourth bias signal CLK4 to a turn-off level and the second control voltage VC2 to turn-on level during the first sub-cycle; configuring the third bias signal CLK3 and the fourth bias signal CLK4 as second pair of clock signals at respective turn-on level and turn-off level with inverted phase in the second sub-cycle; setting the second control voltage VC2 to a turn-off level so that the second plurality of shift register units are controlled along with the second pair of clock signals to respectively output corresponding gate driving output signals in an output phase within the second sub-cycle; and setting the first bias signal CLK1 and the second bias signal CLK2 to a turn-off level and the second control voltage VC1 to a turn-on level during the second sub-cycle.
    • 14. 发明公开
    • PROJECTOR
    • EP3407131A1
    • 2018-11-28
    • EP17741284.8
    • 2017-01-12
    • Seiko Epson Corporation
    • YANASE Shigehiro
    • G03B21/14G03B21/00G09G3/20G09G3/34H04N5/74
    • G03B21/00G03B21/14G09G3/20G09G3/34H04N5/74
    • In a case where rotational frequency detection and light source turn-on control are performed on an illuminator basis, and when a rotation mechanism in one of the illuminators malfunctions and the light source is therefore caused to stop operating, but when the light source in the other illuminator keeps emitting light, a projected image differs from an original image, undesirably resulting in decrease in reliability of the projector.
      A projector includes a first rotation mechanism that rotates a first optical element that affects light from a light source section, a first detector that detects a first rotational frequency of the first rotation mechanism, a second rotation mechanism that rotates a second optical element that affects the light from the light source section, a second detector that detects a second rotational frequency of the second rotation mechanism, a light modulator, a projection optical apparatus, and a control section. The control section causes the light source section to stop emitting the light in a case where at least one of the first rotational frequency and the second rotational frequency detected by the first detector and the second detector decreases to a value smaller than or equal to a non-zero threshold corresponding to the rotational frequency.