JPS54116197A - Liquid crystal display unit - Google Patents
Liquid crystal display unitInfo
- Publication number
- JPS54116197A JPS54116197A JP2390478A JP2390478A JPS54116197A JP S54116197 A JPS54116197 A JP S54116197A JP 2390478 A JP2390478 A JP 2390478A JP 2390478 A JP2390478 A JP 2390478A JP S54116197 A JPS54116197 A JP S54116197A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- fed
- selection
- liquid crystal
- δεh
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Electric Clocks (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
PURPOSE: To obtain excellent contrast without no realtion to the number of digits, by driving two frequency dynamic method for the display unit using the liquid crystal caried with frequency for the anisotropy of dielectric constant.
CONSTITUTION: When the anisotropy of dielectric constant has positive value ΔεL at lower frequency than the frequency fx and negative value ΔεH at higher frequency than fc, if the absolute value of ΔεH/(ΔεL+ΔεH) is greater, the value of the ratio of the effective voltage at selection condition to that non-selective condition VON/VOFF is greater, obtaining excellent contrast. Each frequency is selected so that this can be satisfied, and rectangular wave Ao at addressing (at selection) is fed at timing signal and low frequency Bo is fed at non-selection, and when CON and COFF are respectively fed as the data signal at ON and OFF in phase or opposite phase to the wave form Ao, the voltage FON(R-CON), FOFF (R-COFF) is fed to the liquid crystal video element, high harmonic is fed at selection causing OFF state and ON state is caused at non-selection.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2390478A JPS54116197A (en) | 1978-03-01 | 1978-03-01 | Liquid crystal display unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2390478A JPS54116197A (en) | 1978-03-01 | 1978-03-01 | Liquid crystal display unit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54116197A true JPS54116197A (en) | 1979-09-10 |
Family
ID=12123444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2390478A Pending JPS54116197A (en) | 1978-03-01 | 1978-03-01 | Liquid crystal display unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54116197A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5967592A (en) * | 1982-10-06 | 1984-04-17 | セイコーインスツルメンツ株式会社 | Display unit |
-
1978
- 1978-03-01 JP JP2390478A patent/JPS54116197A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5967592A (en) * | 1982-10-06 | 1984-04-17 | セイコーインスツルメンツ株式会社 | Display unit |
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