公开(公告)号：US20070018557A1

公开(公告)日：2007-01-25

申请号：US11490809

申请日：2006-07-21

申请人： Masaru Fujiwara ,  Tsutomu Niimura ,  Makoto Natori

发明人： Masaru Fujiwara ,  Tsutomu Niimura ,  Makoto Natori

IPC分类号： G09G3/36 ,  H01J1/62

CPC分类号： G02F1/133604 ,  G02F1/133603 ,  G02F1/133609 ,  G02F2001/133614

摘要： A liquid crystal display and a light source apparatus capable of improving color reproduction compared to related arts without declining intensity. A light source apparatus includes: a cold cathode fluorescent tube including a B phosphor for blue and a G phosphor for green; and a light emitting diode for red, wherein the G phosphor emits a single-spectrum light with a peak wavelength of 510 to 530 nm, and the light emitting diode emits a single-spectrum light with a peak wavelength of 620 to 650 nm.

摘要翻译： 与相关技术相比，能够在不降低强度的情况下，能够改善色彩再现的液晶显示器和光源装置。 光源装置包括：包括蓝色B荧光体和绿色荧光粉的冷阴极荧光管; 以及用于红色的发光二极管，其中所述G荧光体发射峰值波长为510至530nm的单光谱，并且所述发光二极管发射峰值波长为620至650nm的单光谱。

公开(公告)号：US5083209A

公开(公告)日：1992-01-21

申请号：US614046

申请日：1990-10-31

申请人： Tatsuo Inoue ,  Tsutomu Niimura

发明人： Tatsuo Inoue ,  Tsutomu Niimura

IPC分类号： G03B7/097 ,  H04N5/225 ,  H04N5/235 ,  H04N5/238

CPC分类号： H04N5/2352

摘要： An automatic exposure control type video camera is designed to cope with the problem of deterioration in the image quality, for an object of higher brightness, by an arrangement in which a diaphragm is actuated when the brightness of the object light is below a predetermined threshold value, and in which the shutter speed is changed when the brightness of the object light is above the predetermined threshold value. More particularly, when the brightness of the object light is below a predetermined value, the shutter speed is set so as to remain constant and rotary diaphragm vanes, for example, are actuated mechanically to control the opening size of the diaphragm to limit the volume of incident light on the image sensing device. Conversely, when the brightness of the object light exceeds a predetermined value and the opening size of the diaphragm vanes reaches a predetermined value, the diaphragm is set so as to remain constant and the shutter is actuated to control the exposure time of the image sensing device to limit the incident light volume.

摘要翻译： 自动曝光控制型摄像机被设计成通过在物体的亮度低于预定阈值的情况下致动隔膜的布置来应对对于较高亮度的物体的图像质量劣化的问题 ，并且当对象光的亮度高于预定阈值时快门速度改变。 更具体地，当目标光的亮度低于预定值时，将快门速度设定为保持恒定，并且例如旋转的膜片叶片机械地致动以控制隔膜的开口尺寸以限制 摄像装置上的入射光。 相反，当物体光的亮度超过预定值并且光圈叶片的开口尺寸达到预定值时，将光阑设定为保持恒定，并且启动快门以控制图像感测装置的曝光时间 以限制入射光体积。

公开(公告)号：US4589021A

公开(公告)日：1986-05-13

申请号：US568258

申请日：1984-01-04

申请人： Joichi Sato ,  Ryuji Shiono ,  Tsutomu Niimura ,  Toshiaki Isogawa ,  Mitsuru Sato

发明人： Joichi Sato ,  Ryuji Shiono ,  Tsutomu Niimura ,  Toshiaki Isogawa ,  Mitsuru Sato

IPC分类号： H04N5/202 ,  H04N5/57 ,  H04N9/69

CPC分类号： H04N5/202

摘要： A circuit having a nonlinear response characteristic provides gamma compensation to a video luminance signal and matches any desired output response curve by selecting the number of diodes connected as series-connected circuits in the compensation circuit. The relationship among the various numbers of series-connected diodes is dependent upon having a current flowing into an output circuit which is the same as a current flowing out of a collector circuit of a differential amplifier, to which the input video luminance signal is applied, and through series-connected diode circuit. These currents are maintained equal by use of a current-mirror circuit, which provides an input current to an output transistor that has in its emitter circuit one of the series-connected diode circuits, and the compensated luminance signal flows in the collector circuit thereof. The differential amplifier is stabilized and balanced by a difference amplifier connected in feedback across the collector leads of the differential amplifier in conjunction with a pedestal clamping synchronization signal and a capacitor to provide a balancing signal at the base lead of the second transistor of the differential transistor amplifier.

摘要翻译： 具有非线性响应特性的电路向视频亮度信号提供伽马补偿，并通过选择在补偿电路中串联连接的电路连接的二极管的数量来匹配任何期望的输出响应曲线。 各种数量的串联二极管之间的关系取决于流入输出电路的电流，该输出电路与从应用输入视频亮度信号的差分放大器的集电极电流流出的电流相同， 并通过串联二极管电路。 这些电流通过使用电流镜电路而保持相等，电流镜电路向输出晶体管提供输入电流，输出晶体管在其发射电路中具有串联二极管电路中的一个，并且经补偿的亮度信号在其集电极电路中流动。 差分放大器通过连接在差分放大器的集电极引线上的差分放大器结合基座钳位同步信号和电容器来稳定和平衡，以在差分晶体管的第二晶体管的基极引线提供平衡信号 放大器

公开(公告)号：US4347531A

公开(公告)日：1982-08-31

申请号：US186706

申请日：1980-09-12

申请人： Akira Yamakoshi ,  Kyoichi Murakami ,  Tsutomu Niimura

发明人： Akira Yamakoshi ,  Kyoichi Murakami ,  Tsutomu Niimura

IPC分类号： H03F3/30 ,  H03F3/347 ,  H03F3/45 ,  H03G1/00 ,  H03G3/10 ,  H04N5/18

CPC分类号： H03G1/0023 ,  H03F3/3066 ,  H03F3/347 ,  H03F3/45071 ,  H03G3/10

摘要： A signal converting circuit, which has particular application as a pedestal clamp circuit for a video signal, includes a differential amplifier having a pair of transistors which produce first and second differential currents at the respective collectors thereof; a first circuit supplied with the first differential current and including a diode and a first resistor having a first resistance value connected in series between the collector of one of the transistors of the differential amplifier and a reference potential; a second circuit supplied with the second differential current and including a second resistor having a second resistance value and a transistor having its collector emitter path connected in series with the second resistor between the collector of the other transistor of the differential amplifier and the reference potential; and an output circuit for producing an output current in response to the second differential current and including a current mirror transistor having its base-collector path connected in parallel with the collector-emitter path of the transistor of the second circuit, wherein the current gain of the signal converting circuit is controlled by the resistance values of the first and second resistors.

摘要翻译： 具有作为视频信号的基座钳位电路的特殊应用的信号转换电路包括具有一对晶体管的差分放大器，该晶体管在其各自的集电极处产生第一和第二差分电流; 提供有第一差分电流并包括二极管的第一电路和具有串联连接在差分放大器的一个晶体管的集电极与参考电位之间的第一电阻值的第一电阻; 提供有第二差分电流的第二电路，并且包括具有第二电阻值的第二电阻器和晶体管，其晶体管的集电极发射极路径与差分放大器的另一晶体管的集电极与参考电位之间的第二电阻器串联; 以及输出电路，用于响应于第二差分电流产生输出电流，并且包括其基极集电极路径与第二电路的晶体管的集电极 - 发射极路并联连接的电流镜晶体管，其中， 信号转换电路由第一和第二电阻器的电阻值控制。

公开(公告)号：US3968453A

公开(公告)日：1976-07-06

申请号：US528935

申请日：1974-12-02

申请人： Masayuki Hongu ,  Tsutomu Niimura

发明人： Masayuki Hongu ,  Tsutomu Niimura

IPC分类号： H03G3/10 ,  H03G1/00 ,  H03G3/00 ,  H03G3/02 ,  H03G3/30

CPC分类号： H03G1/0052 ,  H03G3/00 ,  H03G3/02

摘要： A signal to be controlled is applied to the base of an emitter-follower input transistor, the emitter of which is connected to an input terminal of a differential amplifier. This input terminal of the amplifier is connected by a diode to a controllable current source so that the base current of the differential amplifier input transistor is controlled. A constant current source is connected to the common emitter circuit of the differential amplifier, and the gain of the circuit is determined by the ratio of current in the latter source to current in the controllable source. A current conducting circuit, such as, an emitter load resistor, is connected to the emitter of the input transistor to hold the output impedance thereof at a substantially constant low value inspite of changes in the current of the controllable current source, Maximum gain of the circuit may be determined by separating the controllable current source into a controllable portion and a fixed portion in parallel so that the minimum current is at least as great as the current of the fixed portion. This limits the maximum circuit gain by limiting the maximum ratio of fixed current to controllable current. A fixed voltage source connected to the common circuit point between the controllable current source and the diode assures that the gain of the circuit will not fall below a selected minimum value.

摘要翻译： 要控制的信号被施加到射极跟随器输入晶体管的基极，其发射极连接到差分放大器的输入端。 放大器的该输入端子通过二极管连接到可控电流源，以便控制差分放大器输入晶体管的基极电流。 恒流源连接到差分放大器的公共发射极电路，电路的增益取决于后者的电流与可控电源电流的比值。 诸如发射极负载电阻器的电流传导电路连接到输入晶体管的发射极，以将其输出阻抗保持在基本上恒定的低值，从可控电流源的电流变化来看，最大增益为 可以通过将可控电流源分成可控部分和平行的固定部分来确定电路，使得最小电流至少与固定部分的电流一样大。 这通过限制固定电流与可控电流的最大比例来限制最大电路增益。 连接到可控电流源和二极管之间的公共电路点的固定电压源确保电路的增益不会低于所选择的最小值。

公开(公告)号：US4343018A

公开(公告)日：1982-08-03

申请号：US208193

申请日：1980-11-19

申请人： Tsutomu Niimura ,  Kyoichi Murakami ,  Akira Yamakoshi

发明人： Tsutomu Niimura ,  Kyoichi Murakami ,  Akira Yamakoshi

IPC分类号： H04N9/45 ,  H04N9/64 ,  H04N9/68 ,  H04N9/535

CPC分类号： H04N9/68

摘要： A chrominance signal processing circuit for generating a gain-controlled chrominance signal carrier and a phase-controlled burst signal is provided with a first differential amplifier receiving a chrominance signal carrier and having a first constant current source, a second differential amplifier receiving an output signal of the first differential amplifier, a phase control circuit connected to the output of the second differential amplifier, the second differential amplifier receiving its bias current from a second constant current source during a chroma interval and from a third constant current source during a burst interval, the ratio of the currents of the first and second constant current sources being controlled for controlling the gain of the chrominance signal, and the output of the second differential amplifier being controlled at least during the burst interval, for controlling the phase of the burst signal.

摘要翻译： 用于产生增益控制的色度信号载波和相位控制的突发信号的色度信号处理电路设置有接收色度信号载波并具有第一恒定电流源的第一差分放大器，接收第一恒定电流源的输出信号的第二差分放大器 所述第一差分放大器，连接到所述第二差分放大器的输出的相位控制电路，所述第二差分放大器在色度间隔期间从第二恒定电流源接收其偏置电流，并且在突发间隔期间从所述第三恒定电流源接收所述偏置电流， 控制第一和第二恒定电流源的电流的比率用于控制色度信号的增益，并且至少在突发间隔期间控制第二差分放大器的输出，以控制突发信号的相位。