JP4184429B2 - Wrist blood pressure monitor and cuff spring - Google Patents

Wrist blood pressure monitor and cuff spring Download PDF

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Publication number
JP4184429B2
JP4184429B2 JP2008193706A JP2008193706A JP4184429B2 JP 4184429 B2 JP4184429 B2 JP 4184429B2 JP 2008193706 A JP2008193706 A JP 2008193706A JP 2008193706 A JP2008193706 A JP 2008193706A JP 4184429 B2 JP4184429 B2 JP 4184429B2
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cuff
wrist
spring
sphygmomanometer
cuff spring
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JP2008193706A
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JP2008253822A (en
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淳一 加藤
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日本精密測器株式会社
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  The present invention relates to a wrist sphygmomanometer that can be mounted on a wrist and can measure blood pressure, and a cuff spring used as a core material of a cuff band of the wrist sphygmomanometer.

  Conventional sphygmomanometers are generally the ones that measure blood pressure by wearing a cuff band on the upper arm, but as sphygmomanometers that measure blood pressure by the oscillometric method are put into practical use, As a blood pressure meter described in Patent Document 1, a blood pressure meter that can measure blood pressure with a wrist has been proposed.

As shown in FIG. 5, the sphygmomanometer 50 is formed by integrating a cuff band 52 wound around the wrist 100 into the sphygmomanometer main body 51. An air bag 54 is disposed inside the cuff band 52, and air is supplied from the sphygmomanometer main body 51 to the air bag 54 to inflate the air bag 54 to expand the arteries passing through the wrist 100 (ulna artery 101, radial artery 102). ) To measure blood pressure. In FIG. 5, reference numeral 104 denotes a tendon, 105 denotes an ulna, and 106 denotes a radius.
JP-A-11-299748

  However, the cuff spring (clip plate) 53 included in the cuff band 52 as the core material of the cuff band 52 matches the pulsation part 103 side of the wrist 100 where the ulnar artery 101, radial artery 102 and tendon 104 are located. It is formed in a curved surface shape. Therefore, with the cuff spring 53 aligned with the pulsation portion 103 side of the wrist 100, the cuff band 52 is wound around the wrist 100, and air is supplied from the blood pressure monitor main body 51 to the air bag 54, so that the air bag 54 When the air bag 54 is inflated, the inflated portion of the air bag 54 is not formed in the vicinity of the ulnar artery 101 and the radial artery 102, and the ulnar artery 101 and the radial artery 102 may not be favorably compressed. The blood pressure may not be measured with high accuracy.

  In other conventional sphygmomanometers, an air bag of a cuff belt is bisected at the center position in the circumferential direction of the cuff spring, and air is supplied to each air bag. Some compress the arteries 102 individually. However, in this case, since the air bag is separated, there is a problem that it is difficult to wrap the cuff belt around the wrist 100.

  Further, in the conventional sphygmomanometer 50 in FIG. 5, the cuff spring 53 in the cuff band 52 is a substantially elliptic cylindrical body having a cross-sectional elliptic arc shape in which a part in the circumferential direction is cut, and the curvature of the cuff ring 53 is It is constant in the axial direction of the cuff ring 53. On the other hand, the wrist 100 around which the cuff belt 52 is wound becomes gradually thicker from the hand side toward the arm side. Therefore, when the cuff belt 52 including the cuff spring 53 is wound around the wrist 100, the cuff spring 53 is The cuff band 52 is not easily fitted to the wrist 100 and the cuff band 52 tends to be displaced in the longitudinal direction and the circumferential direction of the wrist 100. Therefore, also in this case, the blood pressure measurement by the sphygmomanometer 50 becomes unstable, and the blood pressure measurement accuracy is lowered.

  An object of the present invention has been made in consideration of the above-described circumstances, and provides a wrist sphygmomanometer that can improve blood pressure measurement accuracy and a cuff spring used as a core material of a cuff band of the wrist sphygmomanometer. There is.

A first aspect of the present invention is a cuff spring formed in a curved surface shape that matches the pulsation part side of the wrist, and includes a mount part on the outside, and the cuff spring is included as a core material, and air is provided on the inside. A wrist having a cuff band wound around the wrist and a sphygmomanometer body attached to the mount portion of the cuff spring and provided with a pressurizing pump for supplying air to the air bag. In the sphygmomanometer, the cuff spring is characterized in that a protruding portion that protrudes inward is formed at a substantially central position in the circumferential direction.

  According to a second aspect of the present invention, a cuff spring formed in a curved surface shape matching the pulsation part side of the wrist and having a mount part on the outside, the cuff spring is included as a core material, and air is provided on the inside. A wrist having a cuff band wound around the wrist and a sphygmomanometer body attached to the mount portion of the cuff spring and provided with a pressurizing pump for supplying air to the air bag. In the sphygmomanometer, the cuff spring is formed with a slit extending in the circumferential direction at an arbitrary position in the axial direction, and both side portions of the slit in the axial direction of the cuff spring are formed with different curvatures. It is a feature.

  According to a third aspect of the present invention, a cuff spring having a curved surface shape matching the pulsation portion side of the wrist and having a mount portion on the outside is included, and the cuff spring is included as a core material, and air is provided on the inside. A wrist having a cuff band wound around the wrist and a sphygmomanometer body attached to the mount portion of the cuff spring and provided with a pressurizing pump for supplying air to the air bag. In the sphygmomanometer, the cuff spring is formed with a protruding portion that protrudes inward at a substantially central position in the circumferential direction, and the cuff spring has a slit extending in the circumferential direction at an arbitrary position in the axial direction. It is formed, and both side portions of the slit in the axial direction of the cuff spring are formed with different curvatures.

According to a fourth aspect of the present invention, in the invention described in the first or third aspect, the cuff spring is provided with a reinforcing rib that reinforces the protruding portion, and is integrally provided on the protruding portion. To do.
A fifth aspect of the present invention is a cuff spring used as a core material of a cuff band of a wrist sphygmomanometer, and a plate-like elastic material is formed into a curved surface shape that matches the pulsation side of the wrist, A projecting portion projecting inward is provided at a substantially central position in the circumferential direction.

  A sixth aspect of the present invention is a cuff spring used as a core material of a cuff band of a wrist sphygmomanometer, and a plate-like elastic material is formed into a curved surface shape that matches the pulsation side of the wrist, A slit extending in the circumferential direction is formed at an arbitrary position in the axial direction, and both side portions of the slit in the axial direction of the cuff spring are formed with different curvatures.

  According to a seventh aspect of the present invention, the cuff spring according to the fifth or sixth aspect is included as a core material, an air bag is disposed on the inner side, and the cuff band wound around the wrist, and the cuff band described above. And a sphygmomanometer body provided with a pressurizing pump that is provided separately and supplies air to the air bag of the cuff belt.

According to the first or third aspect of the present invention, a cuff spring having a curved surface serving as a core member of a cuff belt wound around a wrist while attaching a sphygmomanometer body including a pressurizing pump to a mount portion, Since the protrusion that protrudes inward is formed at the approximate center position in the circumferential direction, this protrusion is when the cuff belt is wound around the wrist with the cuff spring properly aligned with the pulsation side of the wrist. In the circumferential direction of the cuff spring, the cuff spring is positioned between positions corresponding to the two arteries passing through the pulsation part of the wrist. For this reason, when air is supplied from the pressurizing pump of the sphygmomanometer body to the cuff belt air bag, the air bag avoids the protruding part in the circumferential direction of the cuff spring, and both side parts with this protruding part as a boundary Therefore, each of the two arteries of the wrist can be effectively compressed by this expanded portion, and the measurement accuracy of the blood pressure can be improved.

  According to the second or third aspect of the present invention, the cuff spring is formed with a slit extending in the circumferential direction at an arbitrary position in the axial direction, and both side portions of the slit in the axial direction of the cuff spring are formed. Since the cuff spring can be fitted around the wrist whose thickness changes gradually because it has a different curvature, when the cuff band is wrapped around the wrist, the gap between the cuff band and the wrist Can be reduced. As a result, it is possible to prevent the cuff belt from shifting in the longitudinal direction and the circumferential direction of the wrist, so that the measurement of blood pressure can be stabilized and the measurement accuracy of blood pressure can be improved.

  According to the 4th aspect of this invention, since the reinforcement rib which reinforces a protrusion part was integrally provided in the said cuff spring in the said protrusion part, the rigidity of this protrusion part increases. For this reason, in addition to preventing the deformation of the protrusion, the pressure at which the inflated portions of the air bags formed on both sides of the protrusion in the circumferential direction of the cuff spring act on the artery of the wrist becomes even more effective.

  According to the 5th-6th aspect of this invention, the cuff spring used for the wrist blood pressure monitor as described in the 1st or 3rd aspect can be obtained. Further, according to the seventh aspect of the present invention, a wrist sphygmomanometer in which the cuff belt and the main body are separated can be obtained.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view showing an embodiment of a wrist blood pressure monitor according to the present invention. FIG. 2 is a sectional view taken along line II-II in FIG.

  A wrist sphygmomanometer 10 shown in FIG. 1 has a sphygmomanometer body 11 attached with a cuff strip 12, and the sphygmomanometer body 11 is attached to the wrist 1 by wrapping the cuff strip 12 around the wrist 1. The blood pressure is measured at the wrist 1 using the metric method. The wrist sphygmomanometer 10 includes the sphygmomanometer body 11, the cuff band 12, and a cuff spring 13.

  Here, inside the wrist 1, as shown in FIG. 2, the ulna 2 and the radius 3 pass in parallel, and the ulnar artery 5 and the radial artery 6 also pass in parallel. The ulnar artery 5 and radial artery 6 are positioned at one side of the ulna 2 and radius 3 at the wrist 1, that is, within the pulsation part 4 of the wrist 1 with a gap. Further, a plurality of tendons 7 are positioned and passed between the ulnar artery 5 and the radial artery 6 in the pulsating portion 4 of the wrist 1.

  As shown in FIG. 1, the sphygmomanometer main body 11 includes a pressurization pump, a pressure reduction control valve, a pressure sensor (not shown), and these controls in an upper case 14 and a lower case 15 whose openings are joined to each other. The main mechanism for blood pressure measurement, such as a control means for storing, is housed. A liquid crystal display unit 16 and various switches 17 are arranged on the upper surface of the upper case 14. Furthermore, a battery 18 is attached to the side of the blood pressure monitor main body 11. For example, the measured blood pressure and pulse are digitally displayed on the display unit 16.

As shown in FIGS. 1 and 2, the cuff band 12 includes a curved surface-shaped cuff spring 13, which will be described in detail later, as a core material, and an air bag 19 is disposed inside. The cuff belt 12 is wound around the wrist 1 and is wound around the wrist 1 and fixed using a hook-and-loop fastener 20 provided on the inside. In a state where the cuff band 12 is wound around the wrist 1 and fixed, air is supplied from the pressurizing pump of the sphygmomanometer body 11 to the air bag 19 of the cuff band 12, and the wrist 1 is compressed by air pressure.

  As shown in FIGS. 2, 3 and 4, the cuff spring 13 is formed of a flexible synthetic resin or the like, and has a curved surface shape that matches at least a half circumference of the wrist 1 on the pulsating portion 4 side. To be molded. In other words, the cuff spring 13 is a substantially elliptical cylindrical body having an elliptical cross section having a cutout portion 21 that is partially cut in the circumferential direction. The cuff spring 13 is expanded in diameter by expanding the cutout portion 21 and narrows the cutout portion 21. It is provided so that the diameter can be reduced.

  On the outer peripheral side of the cuff spring 13, a mount portion 22 is formed at a substantially central position in the circumferential direction facing the cut portion 21. The mount portion 22 includes a plurality of locking claws 23 and screwing pieces 24, and these locking claws 23 and screwing pieces 24 are cut and raised from the cuff spring 13. Molded integrally. The locking claw 23 is locked to the lower case 15 of the sphygmomanometer body 11 and the screwing piece 24 is screwed, whereby the sphygmomanometer body 11 is attached to the mount portion 22 of the cuff spring 13. An opening 25 is formed in the mount portion 22. A communication pipe (not shown) that connects the pressurization pump of the sphygmomanometer body 11 and the air bag 19 of the cuff belt 12 is inserted into the opening 25.

  Further, the cuff spring 13 is formed with, for example, an arch-shaped projecting portion 26 projecting inward at a substantially central position in the circumferential direction facing the cut portion 21, with a full length along the axial direction of the cuff spring 13. As shown in FIG. 2, the protruding portion 26 is positioned at a position facing the tendon 7 in the pulsating portion 4 of the wrist 1, and the cuff spring 13 is appropriately positioned on the pulsating portion 4 side of the wrist 1. When the cuff band 12 is wound around the wrist 1 in this state, in the circumferential direction of the cuff spring 13, a substantially central position between positions corresponding to the ulnar artery 5 and radial artery 6 in the pulsating portion 4 of the wrist 1, respectively. Positioned on. As a result, when air is supplied to the air bag 19 of the cuff belt 12, the air bag 19 avoids the protruding portion 26 in the circumferential direction of the cuff spring 13, and at both side portions with the protruding portion 26 as a boundary, As shown by the two-dot chain line in FIG. 2, the ulnar artery 5 and the radial artery 6 on both sides of the tendon 7 are effectively compressed in the wrist 1.

  In the region of the mount portion 22 on the outer peripheral side of the cuff spring 13, a reinforcing rib 27 is formed integrally with the protruding portion 26 outside the protruding portion 26. As shown in FIGS. 3 and 4, a plurality of the reinforcing ribs 27 are provided at predetermined intervals in the axial direction of the cuff spring 13 to reinforce the protruding portion 26 and increase the rigidity of the protruding portion 26.

  Further, the cuff spring 13 having a substantially elliptic cylindrical shape has a slit 28 extending in the circumferential direction from the cut portion 21 to the mount portion 22 at an arbitrary position in the axial direction, in the present embodiment, in the axial center position. In FIG. A portion of the cuff spring 13 excluding the mount portion 22 and the protruding portion 26 is divided into a hand-side divided portion 29 and an arm-side divided portion 30 by these slits 28, and the curvatures of these divided portions are different. Composed. That is, the curvature Rb of the arm side divided portion 30 is configured to be larger than the curvature Ra of the hand side divided portion 29. Thereby, when the cuff belt 12 is wound around the wrist 1, the cuff spring 13 of the cuff belt 12 follows the change in the thickness of the wrist 1 even if the wrist 1 gradually increases from the hand side to the arm side. The cuff spring 13, that is, the gap between the cuff belt 12 and the wrist 1 is reduced by fitting to the wrist 1.

  Next, the operation will be described.

The cuff belt 12 is wound around the wrist 1 and the cuff belt 12 is fixed using the hook-and-loop fastener 20. At this time, the protruding portion 26 of the cuff spring 13 in the cuff band 12 is positioned to face the tendon 7 on the pulsating portion 4 side of the wrist 1, and the cuff spring 13 is properly matched with the pulsating portion 4 side of the wrist 1. State. Then, the hand is opened gently with the palm up, the wrist 1 is at the heart height on the upper surface of the desk or the like, and the switches 17 of the sphygmomanometer body 11 are turned on.

  Then, air is supplied from the pressurizing pump of the sphygmomanometer body 11 to the air bag 19 of the cuff belt 12, and the air bag 19 is inflated. In the air bag 19, in the circumferential direction of the cuff spring 13 in the cuff belt 12, both side portions of the protruding portion 26 are appropriately inflated, and these inflated portions are ulnar arteries on both sides of the tendon 7 in the wrist 1. 5 and the radial artery 7 are effectively compressed. In a predetermined progress from this state, the blood pressure is measured by the pressure sensor of the sphygmomanometer body 11 and the measurement result is displayed on the display unit 16 of the sphygmomanometer body 11.

  Since it was configured as described above, the following effects (1) to (4) are achieved according to the above embodiment.

  (1) Since the curved cuff spring 13 serving as a core material of the cuff belt 12 wound around the wrist 1 has a protruding portion 26 protruding inward at a substantially central position in the circumferential direction, the protruding portion 26, the protrusion 26 is made to face the tendon 7 on the pulsation part 4 side of the wrist 1 so that the cuff spring 13 is properly matched with the pulsation part 4 side of the wrist 1, and the cuff band 12 is placed on the wrist 1 in this state. When wound around the cuff spring 13, the cuff spring 13 is positioned at a substantially central position between positions corresponding to the ulnar artery 5 and radial artery 6 passing through the pulsation portion 4 of the wrist 1. For this reason, when air is supplied from the pressurizing pump of the sphygmomanometer body 11 to the air bag 19 of the cuff belt 12, the air bag 19 avoids the protrusion 26 in the circumferential direction of the cuff spring 13, and this protrusion Since both side portions with 26 as a boundary are appropriately inflated, each of the ulnar artery 5 and the radial artery 6 located on both sides of the tendon 7 can be effectively compressed by the inflated portion, and blood pressure measurement accuracy is improved. Can be made.

  (2) Since the cuff spring 13 in the cuff band 12 is formed with a protruding portion 26 protruding inward at a substantially central position in the circumferential direction, the protruding portion 26 is used as a tendon in the pulsating portion 4 of the wrist 1. 7, the cuff spring 13 is matched with the pulsation part 4 side of the wrist 1, so that a contact feeling of the protruding part 26 can be given to a specific part where the tendon 7 of the wrist 1 exists. Thereby, when the cuff belt 12 is wound around the wrist 1, the protruding portion 26 of the cuff spring 13 faces the tendon 7 of the wrist 1 and the cuff spring 13 is appropriately positioned on the pulsating portion 4 side of the wrist 1. Therefore, the compression of the ulnar artery 5 and radial artery 6 of the wrist 1 due to the inflation of the air bag 19 of the cuff belt 12 can be optimized, the blood pressure measurement is stabilized, and the blood pressure can be measured accurately.

  (3) Since the reinforcing rib 27 for reinforcing the protruding portion 26 is integrally provided on the cuff spring 13, the rigidity of the protruding portion 26 is increased. For this reason, in addition to preventing deformation of the protrusion 26, the pressure at which the inflated portions of the air bag 19 formed on both sides of the protrusion 26 in the circumferential direction of the cuff spring 13 act on the ulnar artery 5 and radial artery 6 of the wrist 1. Is even more effective.

  (4) In the cuff spring 13, a slit 28 extending in the circumferential direction from the cut portion 21 to the mount portion 22 is formed symmetrically at a substantially central position in the axial direction, and the slit 28 in the axial direction of the cuff spring 13 is formed. Since the curvatures of the hand-side divided portion 29 and the arm-side divided portion 30 on both sides of the arm-side divided portion 30 are formed to be larger than those of the hand-side divided portion 29, the thickness is increased from the hand side toward the arm side. The cuff spring 13 can be fitted (fitted) around the wrist 1 where is gradually increased. As a result, when the cuff belt 12 is wound around the wrist 1, the gap between the cuff belt 12 and the wrist 1 can be reduced, and the cuff belt 12 can be prevented from being displaced in the longitudinal direction and the circumferential direction of the wrist 1. Measurement can be stabilized, and blood pressure measurement accuracy can be further improved.

As mentioned above, although this invention was demonstrated based on the said embodiment, this invention is not limited to this.

  For example, in the present embodiment, the cuff spring 13 is provided with a slit 28 in the center position in the axial direction, and the portion excluding the mount portion 22 and the protruding portion 26 of the cuff spring 13 is the hand-side split portion 29 and the arm. As described above, the slit 28 is formed at a plurality of positions in the axial direction of the cuff spring 13, and a portion excluding the mounting portion 22 and the protruding portion 26 of the cuff spring 13 is described. It may be divided into three or more in the axial direction, and the curvature of each divided portion may be sequentially increased from the hand side to the arm side.

  In the above embodiment, the cuff spring 13 is provided with the protruding portion 26, the reinforcing rib 27, and the slit 28. However, the protruding portion 26 and the reinforcing rib 27 are provided and the slit 28 is not formed. Alternatively, the slit 28 may be formed and the protrusion 26 and the reinforcing rib 27 may not be provided.

  Furthermore, in the above-described embodiment, an example in which the cuff band 12 is attached to the sphygmomanometer main body 11 is shown. This is because the sphygmomanometer main body 11 and the cuff band 12 are separated from each other like a general sphygmomanometer. Of course, they may be formed separately.

It is a perspective view which shows one Embodiment of the blood pressure meter for wrists which concerns on this invention. It is sectional drawing which follows the II-II line of FIG. The cuff spring of FIG. 2 is shown, (A) is a top view, (B) is a side view. It is a perspective view of the cuff spring of FIG. It is sectional drawing which shows the conventional blood pressure monitor for wrists.

Explanation of symbols

1 wrist 4 pulsation part 5 ulnar artery 6 radial artery 10 wrist sphygmomanometer 11 sphygmomanometer body 12 cuff belt 13 cuff spring 19 air bag 22 mount part 26 protrusion part 27 reinforcing rib 28 slit 29 hand side split part 30 arm side split portion

Claims (3)

  1. A cuff spring formed in a curved surface shape matching the pulsation side of the wrist, and provided with a mount on the outside;
    This cuff spring is included as a core material, an air bag is disposed on the inside, and a cuff belt wound around the wrist,
    A sphygmomanometer for a wrist having a sphygmomanometer body attached to the mount portion of the cuff spring and provided with a pressure pump for supplying air to the air bag,
    In the cuff spring, a slit extending in the circumferential direction is formed at an arbitrary position in the axial direction, and both side portions of the slit in the axial direction of the cuff spring are formed in different curvatures. Sphygmomanometer.
  2.   A cuff spring used as a core material for the cuff band of a wrist sphygmomanometer, in which a plate-like elastic material is formed into a curved surface shape that matches the pulsation side of the wrist, and is surrounded by an arbitrary position in the axial direction thereof. A cuff spring characterized in that a slit extending in a direction is formed, and both side portions of the slit in the axial direction of the cuff spring are formed with different curvatures.
  3. The cuff spring according to claim 2 is included as a core material, an air bag is disposed on the inside, a cuff belt wound around a wrist, and a cuff belt provided separately from the cuff belt to the air bag of the cuff belt A wrist sphygmomanometer, comprising: a sphygmomanometer body including a pressurizing pump for supplying air.
JP2008193706A 2008-07-28 2008-07-28 Wrist blood pressure monitor and cuff spring Active JP4184429B2 (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5825542A (en) 1995-06-26 1998-10-20 Minnesota Mining And Manufacturing Company Diffusely reflecting multilayer polarizers and mirrors
US5828488A (en) 1993-12-21 1998-10-27 Minnesota Mining And Manufacturing Co. Reflective polarizer display
US5831375A (en) 1995-08-11 1998-11-03 Minnesota Mining And Manufacturing Company Electroluminescent lamp using multilayer optical film
US5882774A (en) 1993-12-21 1999-03-16 Minnesota Mining And Manufacturing Company Optical film
US5946431A (en) 1993-07-30 1999-08-31 Molecular Dynamics Multi-functional photometer with movable linkage for routing light-transmitting paths using reflective surfaces
US6025897A (en) 1993-12-21 2000-02-15 3M Innovative Properties Co. Display with reflective polarizer and randomizing cavity
US6088067A (en) 1995-06-26 2000-07-11 3M Innovative Properties Company Liquid crystal display projection system using multilayer optical film polarizers
US6096375A (en) 1993-12-21 2000-08-01 3M Innovative Properties Company Optical polarizer
US6124971A (en) 1995-06-26 2000-09-26 3M Innovative Properties Company Transflective displays with reflective polarizing transflector
USRE38305E1 (en) 1992-10-09 2003-11-11 Asahi Glass Company Ltd. LCD device including an illumination device having a polarized light separating sheet between a light guide and the display
US6804058B1 (en) 1993-12-21 2004-10-12 3M Innovative Properties Company Electroluminescent light source and display incorporating same

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE38305E1 (en) 1992-10-09 2003-11-11 Asahi Glass Company Ltd. LCD device including an illumination device having a polarized light separating sheet between a light guide and the display
US5946431A (en) 1993-07-30 1999-08-31 Molecular Dynamics Multi-functional photometer with movable linkage for routing light-transmitting paths using reflective surfaces
US6096375A (en) 1993-12-21 2000-08-01 3M Innovative Properties Company Optical polarizer
US5828488A (en) 1993-12-21 1998-10-27 Minnesota Mining And Manufacturing Co. Reflective polarizer display
US5882774A (en) 1993-12-21 1999-03-16 Minnesota Mining And Manufacturing Company Optical film
US5962114A (en) 1993-12-21 1999-10-05 3M Innovative Properties Company Polarizing beam-splitting optical component
US5965247A (en) 1993-12-21 1999-10-12 3M Innovative Properties Company Process for forming reflective polarizer
US6613421B2 (en) 1993-12-21 2003-09-02 3M Innovative Properties Company Optical film
US6025897A (en) 1993-12-21 2000-02-15 3M Innovative Properties Co. Display with reflective polarizer and randomizing cavity
US6543153B1 (en) 1993-12-21 2003-04-08 3M Innovative Properties Company Reflective polarizer having improved properties and optical display with improved reflective polarizer
US6804058B1 (en) 1993-12-21 2004-10-12 3M Innovative Properties Company Electroluminescent light source and display incorporating same
US6124971A (en) 1995-06-26 2000-09-26 3M Innovative Properties Company Transflective displays with reflective polarizing transflector
US6088067A (en) 1995-06-26 2000-07-11 3M Innovative Properties Company Liquid crystal display projection system using multilayer optical film polarizers
US6018419A (en) 1995-06-26 2000-01-25 3M Intellectual Properties Company Diffuse reflectors
US5825542A (en) 1995-06-26 1998-10-20 Minnesota Mining And Manufacturing Company Diffusely reflecting multilayer polarizers and mirrors
US5831375A (en) 1995-08-11 1998-11-03 Minnesota Mining And Manufacturing Company Electroluminescent lamp using multilayer optical film

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