公开(公告)号：JP2570775B2

公开(公告)日：1997-01-16

申请号：JP27811187

申请日：1987-11-02

Applicant: SONY CORP

Inventor： SASAKI KENICHI ,  TSUCHA KEIJI

IPC: H05B41/392 ,  G02F1/133 ,  G02F1/1335 ,  G02F1/13357 ,  G09G3/18

公开(公告)号：JPH08167491A

公开(公告)日：1996-06-25

申请号：JP33348794

申请日：1994-12-15

Applicant: SONY CORP

Inventor： SASAKI KENICHI

IPC: H05B41/282 ,  H05B41/392 ,  H05B41/29

Abstract: PURPOSE: To provide a wide scope of dimming function without hurting the starting property of a fluorescent tube by superposing an input voltage generating means having the first frequency, and an input voltage generating means for dimming having the second frequency lower than the first frequency. CONSTITUTION: Of the inverter circuits of a fluorescent tube, the P.W.M. controller 31 is the first input voltage generating means to generate the input voltage having the first frequency. A dimming signal generator 100 is the second input voltage generating means to generate the input voltage having the second frequency for dimming and to superpose it to the input voltage having the first frequency. The P.W.M. controller 31 is regulated by a high frequency such as 70 kHz, while a dimming duty generating circuit 120 is regulated by a low frequency such as 200Hz, by a VR 120 for dimming. In the dimming time, the fluorescent tube is lighted in the ON time t1 at 200Hz, and it is not lighted in the OFF time t2. Since the brightness is determined by the ratio t1/t2, the wave height value of the tube voltage applied to the fluorescent tube 21 is maintained constant, and the starting property is never hurt.

公开(公告)号：JPH07234657A

公开(公告)日：1995-09-05

申请号：JP4788894

申请日：1994-02-22

Applicant: SONY CORP

Inventor： SASAKI KENICHI

IPC: G02B6/00 ,  G02F1/133 ,  G09G3/18 ,  H05B37/02

Abstract: PURPOSE:To obtain the liquid crystal back light unit wherein the luminance difference of each light source is corrected with simple, low-cost constitution by providing variable resistances connected in series with the respective light sources. CONSTITUTION:Each fluorescent tube 11 is impressed with a high-frequency voltage at one electrode from an inverter transformer 13d through a high-frequency capacitor 13e. Then a variable resistance 14 is connected in series with the lower end of the fluorescent tube 11. Consequently, a driving current supplied from a turn-ON circuit 13 flows to the fluorescent tube 11, which illuminates; and this driving current is adjusted to a specific current value by adjusting the variable resistance 14. Therefore, the luminance difference of each fluorescent tube 11 due to variance of constituent components of the fluorescent tube 11 and turn-ON circuit 13 is corrected. Thus, respective fluorescent tubes 11 illuminate with the substantially equal luminance in the liquid crystal back light unit 10, so a luminance distribution which is relatively uniform and not uneven in a specific direction is obtained.

公开(公告)号：JPH06273761A

公开(公告)日：1994-09-30

申请号：JP8265893

申请日：1993-03-17

Applicant: SONY CORP

Inventor： SASAKI KENICHI ,  KATOU HIRONORI

IPC: F21V3/04 ,  F21S2/00 ,  G02F1/1335 ,  G02F1/13357 ,  G09F13/04 ,  G09F13/14

Abstract: PURPOSE:To provide a backlight unit capable of performing uniform back illumination without useless spot by improving the unevenness of luminance of the backlight unit to nearly a perfect state. CONSTITUTION:This unit is provided with a light source 14, a reflection part 13 reflecting light from the light source, and a light diffusing part 11 arranged on the front side of the light source and diffusing the light directly made incident from the light source or the light guided after reflecting the light from the light source by the reflection part; and illumination for an equipment arranged on the front side is performed through the light diffusing part in the unit. A light absorption part 21 is provided at a spot corresponding to an area A where the luminance of the light source 14 is specially high in the light diffusing part 11.

公开(公告)号：JPH05113565A

公开(公告)日：1993-05-07

申请号：JP30250691

申请日：1991-10-22

Applicant: SONY CORP

Inventor： SASAKI KENICHI

IPC: G02F1/1335 ,  G02F1/13357

Abstract: PURPOSE:To obtain the liquid crystal back light unit which is thin, decreases unequal brightness, is large in the quantity of the light released therefrom and is inexpensive by constituting a diffusion plate for diffusing the light released from a fluorescent tube of plural sheets of thin plates. CONSTITUTION:The U-shaped fluorescent tube 1 is held on a reflection plate 2 and the light released from the fluorescent tube 1 is reflected by the reflection plate 2 toward a liquid crystal panel. The diffusion plate 41 is made of a two- layered structure consisting of the main diffusion plate 41 and the auxiliary diffusion plate 42. A space 44 is provided via a spacer 43 between the two diffusion plates 41 and 42. The light released from the fluorescent tube 1 is diffused by the auxiliary diffusion plate 42 and further, this light is diffused by the space 44 and the main diffusion plate 41. Then, the unequal brightness is sufficiently removed even if the distance between the fluorescent tube 1 and the auxiliary diffusion plate 42 decreases. In addition, the total of the thicknesses of the diffusion plates 41, 42 is small and, therefore, the quantity of the light transmitted therethrough is less attenuated and the brightness having the high uniformity is obtd.

公开(公告)号：JPH02201896A

公开(公告)日：1990-08-10

申请号：JP2221489

申请日：1989-01-31

Applicant: SONY CORP

Inventor： SASAKI KENICHI

IPC: G02F1/133 ,  G09F9/00 ,  H05B41/24 ,  H05B41/392

Abstract: PURPOSE:To make it possible to adjust the luminance of a fluorescent lamp with a simple structure by lighting the fluorescent lamp periodically and controlling the ratio of the periods of light-on and light-off. CONSTITUTION:In an oscillation circuit 20A of a lighting apparatus 20 used for a back light for a liquid crystal display device, a variable resistor 21 for luminance adjusting is connected in parallel to a resistor 22 to divide voltage VCC of an electric power source, and by this, the variable resistor 21 is adjusted so as to variably control a base voltage of a transistor 23. Also, an emitter resistor 25 is formed in the transistor 23 and collector voltage is divided by resistor 27, 28 so as to apply the divided voltage to a transistor 29. Meanwhile, the transistor 29 is connected to the emitter resistor of the transistor 23 through a resistor 30 and at the same time connected to the base of the transistor 23 through a capacitor 31 and a resistor 32, and thus an output signal of the transistor 29 is returned to the transistor 23. As a result, by only adjusting the resistor 21, an oscillation output signal with variable duty ratio can be obtained and periodically lighting a fluorescent lamp is made possible.

公开(公告)号：JPH01120798A

公开(公告)日：1989-05-12

申请号：JP27811187

申请日：1987-11-02

Applicant: SONY CORP

Inventor： SASAKI KENICHI ,  TSUCHIYA KEIJI

IPC: H05B41/392 ,  G02F1/133 ,  G02F1/1335 ,  G02F1/13357 ,  G09G3/18

Abstract: PURPOSE:To adjust brightness of a fluorescent lamp well without generating any noise by switching terminals, on the midpoint side where DC power is supplied to respective primary winding divided into two so as to change the number of winding in the appropriate primary winding. CONSTITUTION:The primary winding 2 of a transformer 1 is divided into two at a midpoint while the terminals 16a, 16b, 17a and 17b on the side of the midpoint where DC power 3 is supplied to respective primary windings 2a and 2b divided into two are switched so as to change the number of the primary windings 2 in order to change brightness of a fluorescent lamp 7 connected to the secondary winding 6 of the transformer 1. The terminals on the midpoint side of the primary winding 2 to be supplied with DC power 3 having no voltage fluctuation are switched so as to change over the number of windings of the primary winding 2. Thereby, even when a change-over switch is pulled around, no noise plunges into the circuit of a television picture tube for example by switching.

公开(公告)号：JPS60116293A

公开(公告)日：1985-06-22

申请号：JP22379483

申请日：1983-11-28

Applicant: SONY CORP

Inventor： SASAKI KENICHI

IPC: H04N7/14 ,  H04N7/15

Abstract: PURPOSE:To display on a monitor picture that who is the speaker, by installing display devices to positions facing plural attendants of a conference and at the same time, providing a detecting means which detects speakers. CONSTITUTION:Aural signals SA-SC of each attendant obtained from microphones 11a-11c are added to a transmitting device 12 and a sound signal SP is supplied to a receiving device 33 of a conference room Q. When the sound signal SP is supplied to the receiving device 33, a loudspeaker is sounded. At the same time, the device 12 detects thst who is the speaker and gives corresponding detection signals SC-SE to corresponding display devices 18a-18c. When the detection signals SC-SE are given to the display devices 18a-18c, display surfaces of the devices 18a-18c are flickered. On the other hand, a TV camera 16 simultaneously takes photographs of the attendants, microphones 11a-11c, and devices 11a-11c and sends a picture signal SF to a receiving device 34 through a transmitting device 34. Thus the attendants, etc., are projected on the picture of a monitor device 35.

公开(公告)号：JP2008139832A

公开(公告)日：2008-06-19

申请号：JP2007223487

申请日：2007-08-30

Applicant: Sony Corp ,  ソニー株式会社

Inventor： SEGAMI MASAHARU ,  MORISAWA KAZUHIKO ,  MACHIYA CHIHARU ,  MORIYAMA HIRONOBU ,  SASAKI KENICHI

IPC: G02F1/1335 ,  G02B5/22 ,  G02B5/30 ,  G02F1/13357

Abstract: PROBLEM TO BE SOLVED: To provide a liquid crystal display capable of suppressing deterioration in sensitivity to a remote controller caused by near-IR light emitted from a backlight, and to provide an optical element used for the display. SOLUTION: The liquid crystal display 10A includes a liquid crystal display panel 11, a backlight unit 12 having a cold cathode tube, and an optical element (optical filter) 4A transmitting light in a visible region and partially absorbing light at wavelengths in an IR region. The optical filter 4A comprises a coloring material-containing resin layer 6 containing a near-IR light absorbing coloring material dye, and shows an average transmittance of 85% or more for light at wavelengths of 400 to 700 nm and an average transmittance of 85% or less for light at wavelengths of 850 to 1,150 nm. Thereby, reduction in sensitivity of peripheral devices and the display itself to remote controllers caused by IR light in the above wavelength range emitted from the backlight can be suppressed, while reduction in the display luminance is suppressed. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种能够抑制由背光源发出的近红外光引起的对遥控器的灵敏度的劣化的液晶显示器，并提供用于显示的光学元件。 解决方案：液晶显示器10A包括液晶显示面板11，具有冷阴极管的背光单元12和透射可见光区域的光的光学元件（滤光器）4A，并部分地吸收波长为 一个IR区域。 滤光器4A包括含有近红外光吸收着色材料染料的含着色材料的树脂层6，并且对于波长为400至700nm且平均透射率为85％的光，平均透射率为85％以上， 或更低的波长为850至1150nm的光。 由此，能够抑制由背光源发出的上述波长范围内的红外线造成的外围设备和显示器本身对遥控器的灵敏度的降低，同时抑制了显示亮度的降低。 版权所有（C）2008，JPO＆INPIT

公开(公告)号：JP2007316156A

公开(公告)日：2007-12-06

申请号：JP2006143149

申请日：2006-05-23

Applicant: Sony Corp ,  ソニー株式会社

Inventor： SEGAMI MASAHARU ,  MORISAWA KAZUHIKO ,  SASAKI KENICHI ,  KAWAMURA SATOSHI ,  KATAKURA HITOSHI

IPC: G02F1/1335 ,  G02B5/28 ,  G09F9/00 ,  G09F9/35

Abstract: PROBLEM TO BE SOLVED: To provide a crystal display apparatus which suppresses the coloring of an image to occur when a liquid crystal panel is obliquely viewed. SOLUTION: A crystal display apparatus is equipped with the liquid crystal panel 11, a backlight unit 12 and an optical filter 4 arranged between the liquid crystal panel 11 and the backlight unit 12. The transmittance of red based visual light having ≥600 nm wavelength of the optical filter 4 when the light is emitted toward the oblique direction of the liquid crystal panel 11 is made lower than that when the light is emitted toward the front direction of the liquid crystal panel 11 and the transmittance of blue based visual light having ≤500 nm wavelength when the light is emitted toward the oblique direction of the liquid crystal panel 11, is made higher than that when the light is emitted toward the front direction of the liquid crystal panel 11. As a result, the red coloring and the yellow coloring of the image when the liquid crystal panel 11 is obliquely viewed are suppressed. COPYRIGHT: (C)2008,JPO&INPIT

Abstract translation: 要解决的问题：提供一种当倾斜地观看液晶面板时抑制图像着色的晶体显示装置。 解决方案：晶体显示装置配备有液晶面板11，背光单元12和布置在液晶面板11和背光单元12之间的滤光器4.具有≥600的红色视觉光的透射率 当光朝向液晶面板11的倾斜方向发射时，滤光器4的nm波长比当朝向液晶面板11的前方向发射光时的光学滤波器4的波长低，并且基于蓝色的视觉光的透射率 当朝向液晶面板11的倾斜方向发射光时，具有≤500nm的波长的光的高度比当朝向液晶面板11的前方向发光时的波长高。结果，红色着色和 抑制液晶面板11倾斜观看时的图像的黄色。 版权所有（C）2008，JPO＆INPIT