JPS5518612A - Electro-optical display device - Google Patents
Electro-optical display deviceInfo
- Publication number
- JPS5518612A JPS5518612A JP9082778A JP9082778A JPS5518612A JP S5518612 A JPS5518612 A JP S5518612A JP 9082778 A JP9082778 A JP 9082778A JP 9082778 A JP9082778 A JP 9082778A JP S5518612 A JPS5518612 A JP S5518612A
- Authority
- JP
- Japan
- Prior art keywords
- polarizing films
- dichromatic
- liquid crystal
- display device
- increase
- 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
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
PURPOSE: To differ the tone of segment parts and the tone of other parts and improve the contrast of display by forming the liquid crystal display device by the use of the specific polarizing films of dichromatic ratios varying with wavelengths.
CONSTITUTION: In the field effect type liquid crystal display device formed by sealing nematic liquid crystal 14 between two sheets of glass substrates 12, 18, provided respectively with transparent electrodes 13, 17 and disposing polarizing films 11, 19 on both sides thereof, the polarizing films whose dichromatic ratios increase with an increase in wavelength in the wavelength region longer than the maximum absorption wavelength thereof. Such polarizing films are obtained by dyeing the high polymer films composed of polyvinyl alcohol with the dyes shown by formulasI, II, etc. then thermally uniaxially orienting the same. It is desirable that the dichromatic ratios of the abovementioned polarizing films increase in the wavelength region longer by more than 25nm than the maximum absorption wavelength. In addition, their use in combination with iodine polarizing films enables additional improvement in the contrast to be achieved.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9082778A JPS5518612A (en) | 1978-07-25 | 1978-07-25 | Electro-optical display device |
GB7917801A GB2023301A (en) | 1978-05-24 | 1979-05-22 | Colour polarizing film containing a dichroic dye, especially for use with liquid crystal display devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9082778A JPS5518612A (en) | 1978-07-25 | 1978-07-25 | Electro-optical display device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5518612A true JPS5518612A (en) | 1980-02-08 |
Family
ID=14009413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9082778A Pending JPS5518612A (en) | 1978-05-24 | 1978-07-25 | Electro-optical display device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5518612A (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4946758A (en) * | 1972-09-08 | 1974-05-04 |
-
1978
- 1978-07-25 JP JP9082778A patent/JPS5518612A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4946758A (en) * | 1972-09-08 | 1974-05-04 |
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