DE19733054A1 - Colour filter for colour screen - Google Patents
Colour filter for colour screenInfo
- Publication number
- DE19733054A1 DE19733054A1 DE1997133054 DE19733054A DE19733054A1 DE 19733054 A1 DE19733054 A1 DE 19733054A1 DE 1997133054 DE1997133054 DE 1997133054 DE 19733054 A DE19733054 A DE 19733054A DE 19733054 A1 DE19733054 A1 DE 19733054A1
- Authority
- DE
- Germany
- Prior art keywords
- pixels
- filter
- color
- colour
- blue
- 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.)
- Withdrawn
Links
- 238000010521 absorption reaction Methods 0.000 claims abstract description 10
- 239000003086 colorant Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 239000011521 glass Substances 0.000 claims abstract description 3
- 239000000758 substrate Substances 0.000 claims abstract description 3
- 238000005516 engineering process Methods 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Optical Filters (AREA)
Abstract
Description
Die Erfindung betrifft einen Farbfilter für einen Farb bildschirm, welcher einzeln ansteuerbare Bildpunkte für die Erzeugung der Grundfarben "rot", "grün" und "blau" hat, so daß durch additive Farbmischung beliebige Farb eindrücke erzeugbar sind.The invention relates to a color filter for a color screen, which individually controllable pixels for generation of the basic colors "red", "green" and "blue" has so that any color by additive color mixing impressions can be generated.
Farbfilter der vorstehenden Art sind für farbige Displays allgemein bekannt und gebräuchlich. Bei ihnen sind die Bildpunkte jeweils als Absorptionsfilter ausgebildet. Da bei hat es sich als nachteilig herausgestellt, daß die blauen Bildpunkte eine wesentlich schlechtere Transmis sion haben als die roten und grünen Bildpunkte. Um den noch für alle Farben gleiche Helligkeit zu erreichen, bildet man die blauen Bildpunkte großflächiger aus als die übrigen Bildpunkte, wodurch die angestrebt hohe An zahl der Bildpunkte vermindert wird. Weiterhin ist bei manchen Anwendungen die durch die Absorptionsfilter ent stehende Wärmeentwicklung unerwünscht groß.Color filters of the above type are for colored displays well known and common. They are with them Pixels each designed as an absorption filter. There it has turned out to be disadvantageous in that the blue pixels a much worse transmission sion than the red and green pixels. To the to achieve the same brightness for all colors, the blue pixels are formed larger than the remaining pixels, whereby the desired high An number of pixels is reduced. Furthermore, at some applications ent through the absorption filter standing heat development undesirably large.
Der Erfindung liegt das Problem zugrunde, einen Farbfil ter der eingangs genannten Art so zu gestalten, daß alle drei Grundfarben mit möglichst geringem Aufwand und mit möglichst kleinflächigen Bildpunkten zu erreichen sind. Weiterhin soll ein Verfahren zur Herstellung eines sol chen Farbfilters geschaffen werden.The invention is based on the problem of a color film ter of the type mentioned so that all three basic colors with the least possible effort and with the smallest possible pixels can be reached. Furthermore, a method for producing a sol Chen color filters are created.
Das erstgenannte Problem wird erfindungsgemäß dadurch ge löst, daß nur die Bildpunkte der Farben "rot" und "grün" als Absorptionsfilter, die Bildpunkte für die blaue Farbe jedoch als Interferenzfilter ausgebildet sind. The first-mentioned problem is thereby ge according to the invention resolves that only the pixels of the colors "red" and "green" as an absorption filter, the pixels for the blue color but are designed as an interference filter.
Durch die Ausbildung der blauen Bildpunkte als Interfe renzfilter ergibt sich für die blauen Bildpunkte eine hohe Transmission, so daß diese Bildpunkte zur Erzeugung gleicher Helligkeit nicht großflächiger ausgebildet wer den müssen als die als absorptive Filter wirkenden Bild punkte. Interferenzfilter, die durch abwechselnde Schich ten aus hochbrechenden und niedrigbrechenden Materialien gebildet werden, sind zwar teurer in der Herstellung als Absorptionsfilter, jedoch hat sich gezeigt, daß bei aus schließlicher Ausbildung der blauen Bildpunkte als Inter ferenzfilter die Gesamtkosten eines Displays mit einem solchen Farbfilter nicht höher liegen als wenn ein Farb filter mit ausschließlich durch Drucktechnik erzeugten absorptiven Farbfiltern benutzt würde. Der erfindungsge mäße Farbfilter ist wesentlich kostengünstiger herstell bar als ein ausschließlich nach dem Interferenzprinzip arbeitender Farbfilter, vermeidet jedoch die für die blauen Bildpunkte bei Absorptionsfiltern auftretende schlechte Transmission.Through the formation of the blue pixels as an interface limit filter results for the blue pixels high transmission, so these pixels for generation the same brightness not trained over a large area that must act as the image acting as an absorptive filter Points. Interference filter caused by alternating layers made of high-index and low-index materials are more expensive to manufacture than Absorption filter, however, has been shown to be off eventual formation of the blue pixels as Inter reference filter the total cost of a display with one such color filters are no higher than if a color filters with exclusively generated by printing technology absorptive color filters would be used. The fiction moderate color filter is much cheaper to manufacture cash as an exclusively based on the interference principle working color filter, but avoids those for blue pixels with absorption filters poor transmission.
Das zweitgenannte Problem wird erfindungsgemäß dadurch gelöst, daß ein Glassubstrat zunächst vollflächig mit Interferenzschichten beschichtet wird, die danach mittels einer Maske zur Erzeugung von blauen Bildpunkten struktu riert werden, und daß anschließend die roten und grünen Bildpunkte in herkömmlicher Drucktechnik als Absorptions filter erzeugt werden.According to the invention, the second-mentioned problem is thereby solved solved that a glass substrate initially with the entire surface Interference layers is coated, which is then by means of a mask for creating blue pixels struktu and then the red and green ones Pixels in conventional printing technology as absorption filters are generated.
Ein solches Herstellungsverfahren verursacht nur unwe sentlich höhere Kosten als ein ausschließlich absorptiv arbeitender Farbfilter, hat jedoch für den Display-Ein satz den Vorteil, bei gleich großen Bildpunkten gleiche Lichthelligkeiten zu ermöglichen.Such a manufacturing process causes only unwe considerably higher costs than an exclusively absorptive working color filter, but has for display on the advantage of having the same pixels To enable light brightness.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1997133054 DE19733054A1 (en) | 1997-07-31 | 1997-07-31 | Colour filter for colour screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1997133054 DE19733054A1 (en) | 1997-07-31 | 1997-07-31 | Colour filter for colour screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19733054A1 true DE19733054A1 (en) | 1999-02-04 |
Family
ID=7837530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1997133054 Withdrawn DE19733054A1 (en) | 1997-07-31 | 1997-07-31 | Colour filter for colour screen |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE19733054A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2890624A (en) * | 1952-10-07 | 1959-06-16 | Rca Corp | Interference color filter with blue absorbing layers |
| US3569614A (en) * | 1969-04-10 | 1971-03-09 | Thomas F Hanlon | Liquid crystal color modulator for electronic imaging systems |
| US4003081A (en) * | 1974-01-21 | 1977-01-11 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Display systems with controlled color filtering |
| DE3049175A1 (en) * | 1979-12-27 | 1981-10-01 | Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa | Multicolour optical filter - comprising interference filter formed from multilayer dielectric thin films and dye filter |
| EP0284182A2 (en) * | 1987-03-23 | 1988-09-28 | Tektronix Inc. | Color filter pattern for matrixed display devices |
-
1997
- 1997-07-31 DE DE1997133054 patent/DE19733054A1/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2890624A (en) * | 1952-10-07 | 1959-06-16 | Rca Corp | Interference color filter with blue absorbing layers |
| US3569614A (en) * | 1969-04-10 | 1971-03-09 | Thomas F Hanlon | Liquid crystal color modulator for electronic imaging systems |
| US4003081A (en) * | 1974-01-21 | 1977-01-11 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Display systems with controlled color filtering |
| DE3049175A1 (en) * | 1979-12-27 | 1981-10-01 | Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa | Multicolour optical filter - comprising interference filter formed from multilayer dielectric thin films and dye filter |
| EP0284182A2 (en) * | 1987-03-23 | 1988-09-28 | Tektronix Inc. | Color filter pattern for matrixed display devices |
Non-Patent Citations (2)
| Title |
|---|
| 5-333459 A * |
| JP Patents Abstracts of Japan: 60-134203 A.,P-408,Nov. 27,1985,Vol.9,No.29 * |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
| 8139 | Disposal/non-payment of the annual fee |