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    • 44. 发明授权
    • Illuminating device and liquid crystal display device
    • 照明装置和液晶显示装置
    • US08462293B2
    • 2013-06-11
    • US13228558
    • 2011-09-09
    • Yuhsaku AjichiTakeshi Masuda
    • Yuhsaku AjichiTakeshi Masuda
    • G02F1/1335
    • G02B6/0028G02B6/0046G02B6/0068G02B6/008
    • A tandem type backlight comprises plural light-emitting units (11) including at least one point light source (5) and a light guide plate (7) for causing light from the at least one point light source to be diffused and surface-emitted. In each of the light-emitting units (11), a length X of a light guide area (9) is set so that an area, on a boundary surface between a light-emitting area (10) and the light guide area (9), of a cross-section of a light beam that is emitted from the at least one point light source (5) and is diffused in the light guide plate (7) is equal to or larger than an area of the boundary surface (interface). Moreover, a length X, in a length direction D1, of the light guide area is smaller than a length Y, in the length direction D1, of the light-emitting area.
    • 串联型背光源包括多个包括至少一个点光源(5)的发光单元(11)和用于使来自至少一个点光源的光漫射和表面发射的导光板(7)。 在每个发光单元(11)中,将导光区域(9)的长度X设定为使得发光区域(10)和导光区域(9)之间的边界面上的面积 )从所述至少一个点光源(5)发射并在所述导光板(7)中扩散的光束的横截面等于或大于所述边界面(界面 )。 此外,导光区域的长度方向D1的长度X比发光区域的长度方向D1的长度Y小。
    • 45. 发明授权
    • Illumination device and display device
    • 照明装置和显示装置
    • US08414173B2
    • 2013-04-09
    • US12599944
    • 2008-07-25
    • Takeshi MasudaYuhsaku AjichiYukihide Kohtoku
    • Takeshi MasudaYuhsaku AjichiYukihide Kohtoku
    • F21V7/04
    • G02B6/0055G02B6/0028G02B6/0043G02B6/0068G02B6/008G02F1/133603G02F1/133611
    • An illumination device includes a plurality of light source units (20) each having a light guide plate and at least one light source. The light guide plate is provided with an illumination region (4) through which an incident beam of light from the at least one light source is emitted outward and a light guide region (3) through which the incident beam of light from the at least one light source is guided toward the illumination region (4), with the illumination region (4) and the light guide region (3) laid side-by-side. Light source units (20) adjacent to each other along a direction of an optical axis of the at least one light source are disposed so that the illumination region (4) of one of the light source units (20) covers at least a part of the light guide region (3) of the other light source unit (20). A diffuse reflection sheet (33) and a specular reflection sheet (32) or a light absorption sheet are provided between the light guide plate (LG(k)) of the one of the light source units (20) and the at least one light source (BL(k+1)) of the other light source unit (20) in such a way as to be put on top of each other. This makes it possible to suppress uneven irradiation and improve luminance uniformity and color-mixing properties of a tandem illumination device having light guide plates disposed in such a way as to be overlapped.
    • 照明装置包括多个光源单元(20),每个光源单元具有导光板和至少一个光源。 导光板设置有照射区域(4),来自至少一个光源的入射光束通过该照明区域向外发射;以及导光区域(3),来自至少一个光源的入射光束穿过该导光区域 光源被引导到照明区域(4),照明区域(4)和导光区域(3)并排放置。 沿着至少一个光源的光轴的方向彼此相邻的光源单元(20)被布置成使得光源单元(20)中的一个的照明区域(4)覆盖至少一部分 另一个光源单元(20)的导光区域(3)。 在所述一个光源单元(20)的导光板(LG(k))和所述至少一个光线之间设置漫反射片(33)和镜面反射片(32)或光吸收片 源(BL(k + 1)),以使其彼此重叠。 这使得可以抑制不均匀的照射并提高具有以重叠的方式设置的导光板的串联照明装置的亮度均匀性和混色特性。
    • 48. 发明申请
    • LED Driver Circuit, Light Source Device, And LCD Device
    • LED驱动器电路,光源器件和LCD器件
    • US20120098462A1
    • 2012-04-26
    • US13379578
    • 2010-04-14
    • Naoto InoueAkira TomiyoshiTakeshi MasudaYuhsaku Ajichi
    • Naoto InoueAkira TomiyoshiTakeshi MasudaYuhsaku Ajichi
    • H05B37/02
    • H05B33/0815G09G3/3406H05B33/0851
    • An LED driver circuit which provides a cost reduction is provided by employing a circuit configuration which allows a size reduction. In at least one example embodiment, the LED driver circuit includes a first switching element, a second switching element, a sense resistor, a sensing unit, a calculator, and a driver. The plurality of LEDs, the first switching element, the second switching element, and the sense resistor are coupled to each other in series in this order. The sensing unit receives a voltage at a node between the second switching element and the sense resistor, and generates voltage data representing the voltage. The calculator calculates a temporal average of a current flowing through the LEDs based on the voltage data, and generates current data corresponding to the temporal average. The driver drives the first switching element and the second switching element based on the current data.
    • 通过采用允许尺寸减小的电路配置来提供降低成本的LED驱动器电路。 在至少一个示例实施例中,LED驱动器电路包括第一开关元件,第二开关元件,感测电阻器,感测单元,计算器和驱动器。 多个LED,第一开关元件,第二开关元件和检测电阻器按顺序相互耦合。 感测单元在第二开关元件和检测电阻之间的节点处接收电压,并产生表示电压的电压数据。 计算器基于电压数据计算流过LED的电流的时间平均,并且生成对应于时间平均的当前数据。 驱动器基于当前数据驱动第一开关元件和第二开关元件。