公开(公告)号：WO2006126549B1

公开(公告)日：2007-02-15

申请号：PCT/JP2006310266

申请日：2006-05-23

Applicant: SONY CORP ,  SATO SATOSHI ,  KAWAMURA SATOSHI ,  SENOUE MASAHARU ,  FURUKAWA NORIMASA ,  SASAKI KENICHI

Inventor： SATO SATOSHI ,  KAWAMURA SATOSHI ,  SENOUE MASAHARU ,  FURUKAWA NORIMASA ,  SASAKI KENICHI

IPC: G02B5/28 ,  G02F1/1335

CPC classification number: G02B5/286 ,  G02F1/133509 ,  G02F1/133603 ,  G02F2001/133521 ,  G02F2203/055

Abstract: There is provided a liquid crystal display device capable of suppressing coloring of an image when a liquid crystal panel is viewed in an oblique direction. An optical filter (4) is arranged on the front-most surface of the liquid crystal panel (11). The optical filter (4) changes transmittance when visible light of a predetermined wavelength range is emitted in an oblique direction than when emitted in the front direction. When a wide color range light source such as an LED is employed as a light source (8) of a backlight unit (12), the entire screen appears reddish and the color temperature tends to be lowered if the liquid crystal panel (11) is viewed in an oblique direction. In this case, by configuring the optical filter (4) so as to selectively attenuate the intensity of the red-based visible light range and increase the intensity of the blue-based visible light range, it is possible to suppress reddish-ness of the screen when viewed in an oblique direction.

Abstract translation: 提供一种当在倾斜方向观看液晶面板时能够抑制图像着色的液晶显示装置。 在液晶面板（11）的最前面配置有滤光器（4）。 当沿着正向发射的倾斜方向发出预定波长范围的可见光时，滤光器（4）改变透射率。 当使用诸如LED的宽色彩范围光源作为背光单元（12）的光源（8）时，如果液晶面板（11）是（...），则整个屏幕显示为微红色，并且如果液晶面板 从倾斜的方向看。 在这种情况下，通过将滤光器（4）配置为选择性地衰减红色可见光范围的强度并增加蓝色可见光范围的强度，可以抑制红色可见光范围的红色 在倾斜方向观看屏幕。

公开(公告)号：US3576389A

公开(公告)日：1971-04-27

申请号：US3576389D

申请日：1968-02-06

Applicant: SONY CORP

Inventor： SASAKI KENICHI ,  NISHI KAZUNORI

IPC: H04N9/68 ,  H04N9/48

CPC classification number: H04N9/68

Abstract: In an automatic color control circuit for color television receivers, color burst signals separated from the output of a carrier chrominance signal amplifier are rectified to produce a control signal for varying the gain of the amplifier inversely with respect to the control signal, and the control signal is suppressed, as by the application to the rectifier circuit of a reverse bias which varies inversely with the burst signals, so as to reduce the amplifier gain from its maximum level only when the input chrominance signals, and hence the burst signals separated therefrom, are at least at predetermined levels.

公开(公告)号：EP1884806A4

公开(公告)日：2009-07-29

申请号：EP06746750

申请日：2006-05-23

Applicant: SONY CORP

Inventor： SASAKI KENICHI ,  FURUKAWA NORIMASA ,  SENOUE MASAHARU ,  KAWAMURA SATOSHI ,  SATO SATOSHI

IPC: G02B5/28 ,  G02F1/1335

CPC classification number: G02B5/286 ,  G02F1/133509 ,  G02F1/133603 ,  G02F2001/133521 ,  G02F2203/055

Abstract: A liquid-crystal display that can inhibit the coloring of an image when a liquid-crystal panel is viewed from an oblique direction is provided. An optical filter 4 is disposed at the forward end of a liquid-crystal panel 11, the optical filter 4 having different transmittances between a light component that travels in an oblique direction and a light component that travels in a direction normal to the multilayer, both of the light components having a predetermined wavelength range. In the case where a wide-color-gamut light source, such as LEDs, is used as a light sources 8 of a backlight unit 12, when the liquid-crystal panel 11 is viewed from an oblique direction, the entire image area tends to be reddish, and the color temperature tends to decrease. In this case, the optical filter 4 is configured such that the intensity of a visible red light component is selectively reduced and such that the intensity of a visible blue light component is increased, thereby inhibiting the reddening of an image area when viewed from an oblique direction.

公开(公告)号：JPH1167482A

公开(公告)日：1999-03-09

申请号：JP21629797

申请日：1997-08-11

Applicant: SONY CORP

Inventor： SASAKI KENICHI

IPC: G02B6/00 ,  F21V8/00 ,  G02F1/133 ,  H02M7/48 ,  H05B41/24

Abstract: PROBLEM TO BE SOLVED: To provide a stable lighting circuit for a fluorescent tube by reducing the gain of tube current when input voltage becomes a set value or less and providing a gain control part to raise the frequency of output voltage applied to a piezoelectric transformer. SOLUTION: An input voltage VDC of an input power source 3 detected by an input voltage detection part 5 is controlled by a frequency control part 7 in terms of frequency. A boosting part 9 imparts its output voltage which is boosted and varying periodically to a fluorescent tube 11 and a tube current detection part detects the tube current flowing through the fluorescent tube 11. When the input voltage VDC becomes a predetermined value or less, a gain control part 15 reduces the gain of the tube current and performs the control to raise the frequency of the output voltage imparted to the piezoelectric transformer. Thus, the transformer current of the piezoelectric transformer 41 is so controlled that it never exceed its peak value even if the input voltage VDC is reduced and thereby, the wide range of input voltage can be dealt with. The fluorescent tube 11 is a back light to make a liquid crystal display device 21 easy to see and accordingly, it is preferable that the output voltage from the boosting part 9 should be sinusoidal.

公开(公告)号：JPH10162985A

公开(公告)日：1998-06-19

申请号：JP31573596

申请日：1996-11-27

Applicant: SONY CORP

Inventor： SASAKI KENICHI

IPC: H05B41/282 ,  H05B41/29

Abstract: PROBLEM TO BE SOLVED: To eliminate uneven brightness caused by temperature distribution in the upper and lower position relation of a plurality of fluorescent tubes. SOLUTION: A back light device has a plurality of fluorescent tubes 2a-2d which illuminate a liquid crystal display panel from the back side, drivers 7a-7d which drive the fluorescent tubes 2a-2d and a plurality of driving circuit means capable of variably controlling the driving current, and a plurality of temperature sensors 6b-6d arranged in the vicinity of part of each of the fluorescent tubes 2a-2d, and driving current supplied to the fluorescent tubes 2a-2d is individually controlled based on the temperature information detected with the temperature sensors 6b-6d.

公开(公告)号：JPH05129085A

公开(公告)日：1993-05-25

申请号：JP29011391

申请日：1991-11-06

Applicant: SONY CORP

Inventor： SASAKI KENICHI

IPC: H05B41/24 ,  H05B41/42

Abstract: PURPOSE:To attain a smaller power, miniaturization and a lower cost minimize power by providing a plurality of taps on the primary side coil of the transformer of a starting circuit, and operating a tap switching circuit to generate a starting voltage and a lighting keeping voltage, respectively. CONSTITUTION:By inputting a signal from a signal input terminal (a) after inputting a power source from a power source terminal (c), transistors Q3, Q4 are alternately ON/OF and laid in oscillating states, and a discharge starting voltage is applied to a fluorescent lamp 5. The discharge starting voltage induces a high voltage from the primary side coil 1a having a small coil winding number between taps 13, 12 or taps 13 14 to the secondary side coil lb. When the signal is switched by a signal switching circuit and inputted to the input terminal (b) after the fluorescent lamp 5 reaches the arc discharge state, transistors Q1, Q2 are alternately ON/OFF and laid in oscillating states, and a discharge keeping voltage about a half the discharge starting voltage is applied from the coil 1a between the taps 13, 11 or 13, 15 to the coil 1b. Thus, the number of parts can be reduced, and the miniaturization and reduction in cost can be attained.

公开(公告)号：JPH05113563A

公开(公告)日：1993-05-07

申请号：JP30250491

申请日：1991-10-22

Applicant: SONY CORP

Inventor： SASAKI KENICHI

IPC: G02F1/1335 ,  G02F1/13357

Abstract: PURPOSE:To improve an insulating characteristic and to reduce a size and cost by integrally forming a coating part for coating the high-voltage part of a power source circuit part in a part of a reflection plate. CONSTITUTION:A U-shaped fluorescent tube 2 is disposed on the rear surface of a liquid crystal panel 1. The fluorescent tube 2 is held on the reflection plate 3 having a rectangular planar shape. An inverter circuit housing part 6 enclosed by a top plate 4 and a side plate 5 is provided on one side on both ends sides of the fluorescent tube 2 of the reflection plate 3. A high-voltage generating part housing part 7 is provided by projecting between both ends of the fluorescent tube 2 at the center in the longitudinal direction of the inverter circuit housing part 6. The high-voltage generating part housing part 7 is formed by molding integrally with the reflection plate 3 to a box shape opened on the rear surface and is closed at other five surfaces. The printed circuit board 9 of an inverter circuit part 8 is mounted on the rear surface of the inverter circuit housing part 6 of the reflection plate 3. The high-voltage generating part 10 is housed in the high-voltage generating part housing part 7 and is coated and insulated by the housing part 7.

公开(公告)号：JPH04149991A

公开(公告)日：1992-05-22

申请号：JP27329090

申请日：1990-10-15

Applicant: SONY CORP

Inventor： YOSHIDA HIROAKI ,  SASAKI KENICHI ,  TSUCHIYA KEIJI

IPC: H05B41/24 ,  H05B41/18

Abstract: PURPOSE:To keep the brightness constant without increasing power consumption by controlling switching according to a drive current of a discharge lamp. CONSTITUTION:When an FET 13 is turned on, a capacitor 11 and a primary coil 12a act as a resonance circuit, a voltage is introduced to a secondary coil 12b, and it is applied to a discharge lamp 3. A switching frequency of the FET 13 is set to be high frequency, the high frequency is also applied to the lamp 3. A drive current for the lamp 3 is detected by a serial resistor 21, and it is converted into a voltage to be outputted to a control circuit 5. it is compared with a reference current here, and a servo is applied to make them equal so as to keep it constant. The brightness of the lamp 3 can thus be regulated by changing the reference voltage. The brightness can be next constant regardless of an input voltage.

公开(公告)号：JPH0451025A

公开(公告)日：1992-02-19

申请号：JP15953790

申请日：1990-06-18

Applicant: SONY CORP

Inventor： HANZAWA MASANORI ,  HANIYUU ATSUHIDE ,  SASAKI KENICHI

IPC: G02F1/1335 ,  F21V23/00 ,  G02F1/13357 ,  G02F1/1345 ,  G09F9/00 ,  G11B33/06

Abstract: PURPOSE:To improve the assembly operability, serviceability, etc., by fitting a reflecting plate unit detachably to the back surface of a liquid crystal panel and coupling the connector of a DA inverter with the connector of the reflecting plate unit in a disconnectable state. CONSTITUTION:In the liquid crystal display 3 used for a TV integrated type VTR, etc., the reflecting plate unit 50 formed by unitizing a light emission body, i.e. fluorescent tube 52 is fitted detachably to the back surface of the liquid crystal panel of a liquid crystal display main body 4 and the connector 61 of the DA inverter 60 is coupled with the connector of the reflecting plate unit 50 in the disconnectable state. The liquid crystal display 3 can easily be assembled or disassembled. Consequently, the assembly operability of the liquid crystal display 3 and the serviceability at the time of the replacement of the fluorescent tube 52, etc., can be improved more.

公开(公告)号：JPS63314983A

公开(公告)日：1988-12-22

申请号：JP15212087

申请日：1987-06-18

Applicant: SONY CORP ,  NIPPON TELEGRAPH & TELEPHONE

Inventor： SASAKI KENICHI ,  ARAKI AKISHI ,  TAKEUCHI KENICHI ,  UCHIUMI NORIYUKI

IPC: H04N7/14

Abstract: PURPOSE:To prevent the blooming of a image pickup tube and to realize good recovery from the blooming by providing a shutter mechanism on the front of the image pickup tube and closing this shutter mechanism at least in the off-state period of a power source. CONSTITUTION:The shutter mechanism 41 is provided on the from of the image pickup part 1 and can be closed at least by interlocking with the off-state of the power source (a switch 39). Since the shutter mechanism 41 can be closed at least by interlocking with the off-state of the power source, the blooming of the image pickup tube generated by the exposure of image pickup tube to an external light does not occure. Besides, the blooming can be well recovered by closing the shutter device 41 at the off-state time of the power source.