摘要:
A novel stimulable phosphor having a high sensitivity to a semiconductor laser as a stimulating light is disclosed, and is represented by the formula:{(M.sup.II X.sup.1.sub.2-2u X.sup.2.sub.2u).sub.1-x-y (M.sup.I X.sup.1.sub.1-v X.sup.2.sub.v).sub.x (M.sup.III X.sup.1.sub.3-3w X.sup.2.sub.3w).sub.y }.sub.1-a A.sub.a :bEu.sup.2+where M.sup.II represents at least one divalent metal such as Ba, Be, Mg or Ca; M.sup.I represents at least one monovalent metal such as Li, Na, K, Rb or Cs; M.sup.II represents at least one divalent metal such as Ba, Be, Mg or Ca; M.sup.III represents at least one trivalent metal such as Sc, La, Y, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Al, Ga, In or Tl; X.sup.1 represents Br or Cl; X.sup.2 represents at least one halogen atom that is different from X.sup.1 ; A represents at least one metal oxide such as BeO, MgO, CaO, SrO, BaO, Al.sub.2 O.sub.3, Y.sub.2 O.sub.3, La.sub.2 O.sub.3, In.sub.2 O.sub.3, Ga.sub.2 O.sub.3, SiO.sub.2, TiO.sub.2, ZrO.sub.2, GeO.sub.2, SnO.sub.2, Nb.sub.2 O.sub.5, Ta.sub.2 O.sub.5 and ThO.sub.2 ; and wherein 0.ltoreq.x+y.ltoreq.0.5; 0.ltoreq.u+v+w.ltoreq.0.1; 0.ltoreq.a.ltoreq.0.1; and 0.ltoreq.b.ltoreq.0.2.
摘要:
The invention relates to a display element displaying images utilizing a cholesteric liquid crystal. The display element has improved contrast and can therefore display high quality images. The display element includes a pair of substrates, a liquid crystal enclosed between the pair of substrates, first electrodes formed on either of the pair of substrates, second electrodes formed on the other of the pair of substrates, a pixel region defined by disposing the substrates such that the first electrodes and the second electrodes face each other in an intersecting relationship, a wall structure formed between the pair of substrates and outside the pixel region so as to surround the pixel region, an opening provided in a part of the wall structure to allow the liquid crystal to flow, and a reflectance reducing portion formed at the opening to reduce the reflectance of the liquid crystal at the opening.
摘要:
In a digital X-ray apparatus for exposing an X-ray transmitted through an object onto a photostimulable phosphor plate, for scanning the photostimulable phosphor plate by an excitation beam, and for obtaining an X-ray image, the digital X-ray apparatus includes a switch unit connected to a storage unit and switching between a standard photographing mode and an actual photographing mode; a correction coefficient conversion unit converting the X-ray image data to an image data having a standardized lightness; a first storage unit storing an initial correction coefficient after standardization in the correction coefficient conversion unit; a second storage unit storing a correction coefficient after standardization in the correction coefficient conversion unit; a detection unit comparing a value of the correction coefficient from the second storage unit with a value of the initial correction coefficient from the first storage unit, and detecting whether or not a difference between the value of the correction coefficient at each picture element and the value of the initial correction coefficient at each picture element exceeds a predetermined threshold value; and a generation unit displaying a number of abnormal picture elements detected by the detection unit and generating an alarm message when the number of abnormal picture elements exceeds a predetermined number, the predetermined number being defined by a ratio of the number of abnormal picture elements to the number of all the picture elements.
摘要:
A method for forming an X-ray image. The method involves the use of an X-ray transforming sheet which includes a novel stimulable phosphor on a substrate. The phosphor has a high sensitivity to a semiconductor laser as a stimulating light and is represented by the formula:{(M.sup.II X.sup.1.sub.2-2u X.sup.2.sub.2u).sub.1-x-y (M.sup.I X.sup.1.sub.1-v X.sup.2.sub.v).sub.x (M.sup.III X.sup.1.sub.3-3w X.sup.2.sub.3w).sub.y }.sub.1-a A.sub.a :bEu.sup.2+where M.sup.II represents at least one divalent metal such as Ba, Be, Mg or Ca; M.sup.1 represents at least one monovalent metal such as Li, Na, K, Rb or Cs; M.sup.III represents at least one trivalent metal such as Sc, La, Y, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Al, Ga, In or Tl; X.sup.1 represents Br or Cl; X.sup.2 represents at least one halogen atom that is different from X.sup.1 ; A represents at least one metal oxide such as BeO, MgO, CaO, SrO, BaO, ZnO, Al.sub.2 O.sub.3, Y.sub.2 O.sub.3, La.sub.2 O.sub.3, In.sub.2 O.sub.3, Ga.sub.2 O.sub.3, SiO.sub.2, TiO.sub.2, ZrO.sub.2, GeO.sub.2, SnO.sub.2, Nb.sub.2 O.sub.5, Ta.sub.2 O.sub.5 and ThO.sub.2 ; and wherein 0>x+y>0.5; 0>u+v+w a>0.1; and 0 0.2. The transforming sheet is exposed to X-rays and then the exposed phosphor is stimulated with electromagnetic radiation to release the stored energy as a phosphostimulated luminescent light which may be detected to thereby obtain an image of the object.
摘要翻译:一种形成X射线图像的方法。 该方法涉及使用在基片上包含新型可刺激荧光体的X射线转换片。 荧光体对作为刺激光的半导体激光器具有高灵敏度,并由下式表示:{(MIIX12-2uX22u)1-xy(MIX11-vX2v)x(MIIIX13-3wX23w)y} 1-aAa:bEu2 +其中 MII代表至少一种二价金属如Ba,Be,Mg或Ca; M1表示Li,Na,K,Rb或Cs中的至少一种一价金属; MIII表示至少一种三价金属如Sc,La,Y,Ce,Pr,Nd,Sm,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Al,Ga,In或Tl; X1表示Br或Cl; X2表示与X1不同的至少一个卤原子; A表示BeO,MgO,CaO,SrO,BaO,ZnO,Al2O3,Y2O3,La2O3,In2O3,Ga2O3,SiO2,TiO2,ZrO2,GeO2,SnO2,Nb2O5,Ta2O5和ThO2中的至少一种金属氧化物; 并且其中0> x + y> 0.5; 0> u + v + w <0.1; 0> a> 0.1; 和0 <0.2。 将转印片暴露于X射线,然后用电磁辐射刺激暴露的荧光体,以释放存储的能量作为可被检测的磷光体发光,从而获得物体的图像。
摘要:
A digital X-ray apparatus forms a latent image of an object on a photostimulable phosphor plate as an energy distribution pattern using X-ray energy and reads the latent image using an excitation light beam. A plate, of a material which does not transmit the excitation light beam, has holes formed therein with photostimulable phosphor positioned in the holes, the photostimulable phosphor emitting a fluorescent light when irradiated by the excitation light beam, the emitted light beam gathered and a corresponding signal produced. The excitation light beam reflected from the photostimulable phosphor plate is also gathered and a signal responsive thereto also is produced. A method of production by stacking and bonding plural metal sheets having appropriate patterns of holes therein with the photostimulable phosphor and a transparent protection film layer thereon provides the structure of the photostimulable phosphor plate.
摘要:
In a liquid crystal display device that uses a liquid crystal material having spontaneous polarization and is actively driven by a TFT, a voltage corresponding to image data is applied twice by driving the TFT of each pixel electrode on a line by line basis of a liquid crystal panel, during writing in one frame. During erasure in one frame, voltage application to liquid crystal by batch selection of all the pixel electrodes is performed three times. With this three times of voltage application, it is possible to achieve a black display state in each pixel and make the stored charge amount at the liquid crystal in each pixel substantially zero.
摘要:
A backlight device for a transmissive liquid crystal display device includes a plurality of light sources, including a cold cathode fluorescent lamp and an LED, a liquid crystal panel, and a light guide plate. The light guide plate causes light entering into it through one surface thereof to emerge out of another surface thereof toward the liquid crystal panel. A controller for the backlight device selects at least one of the cold cathode fluorescent lamp and LED, depending on brightness required for the liquid crystal display device and determines, in accordance with the required brightness, the brightness of the selected light source to operate the light source accordingly.