Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1998-09-21
1999-10-26
Epps, Georgia
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359267, 359275, 351 44, G02F 115, G02F 1153, G02F 1163
Patent
active
059738189
ABSTRACT:
A method and concomitant apparatus for use in an electrochromic control system in which components causing the charging and discharging of an electrochromic device are subject to drift errors and other errors. In the case of such errors, the actual programming level and the desired programming level as indicated by, e.g., a count value, may diverge. The invention periodically determines the actual programming level of the electrochromic device and responsively adjusts a parameter representative of the desired programming level.
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Copending U.S. application No. 09/157,724 entitled "Apparatus for Controlling an Electrochromic Device", filed Sept. 21, 1998, by Walter P. Sjursen.
U.S. application No. 09/157,725 entitled "Method and Apparatus for Controlling an Electrochromic Device", filed Sept. 21, 1998, by Timothy A. Pletcher, et al.
U.S. application No. 09/046,386 entitled "Method for Forming a Molded Edge Seal", filed Mar. 23, 1998, by John E. Smarto, et al.
Gregory Christopher C.
Sjursen Walter P.
Burke Margaret
Epps Georgia
Mitchell William C.
PPG Industries Ohio Inc.
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