EP0035299A2
Expired / Lapsed
EP
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Display device
Assignee: Koninklijke Philips NV
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Filing: 1981-02-18
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Granted: —
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Expires: 2001-02-18
Abstract
Abstract A display device having a transparent supporting plate (10) which is provided with transflective regions (11). At a short distance from the first supporting plate (10) resilient electrodes (14) are connected which are manufactured from a partially reflective material. By varying the distance between the resilient electrodes (10) and the transflective regions (11), the reflection of incident light can be controlled from zero to maximum intensity as a result of the occurring interference. Both monocolour and multicolour pictures can be displayed by means of such a display device. Such a display device is particularly suitable for use in a projection television device.
Inventors
- 👤 Ties Siebolt Te Velde
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 12:41
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/37; G09F9/372; G02; G02B; G02B26/00; G02B26/001; G02F; G02F1/00; G02F1/01; G02F1/21
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
111 words
A display device comprising a transparent first supporting plate having a transflective layer, and a partially reflective layer which reflects to substantially the same extent as the transflective layer and which is spaced apart from the transflective layer and which is secured so as to be movable to the first supporting plate in such manner that when light is incident on the device, interference phenomena occur dependent on the distance between the transflective layer and the partially reflective layer, characterized in that the partially reflective layer constitutes a pattern of resiliently connected electrodes and the transflective layer is divided into regions which are common for one or more resiliently connected electrodes.
Claim 2
Dependent Claim
111 words
A display device comprising a transparent first supporting plate having a transflective layer, and a partially reflective layer which reflects to substantially the same extent as the transflective layer and which is spaced apart from the transflective layer and which is secured so as to be movable to the first supporting plate in such manner that when light is incident on the device, interference phenomena occur dependent on the distance between the transflective layer and the partially reflective layer, characterized in that the partially reflective layer constitutes a pattern of resiliently connected electrodes and the transflective layer is divided into regions which are common for one or more resiliently connected electrodes.
Claim 3
Dependent Claim
47 words
A display device as claimed in Claim 1 characterized in that the pattern of resiliently connected electrodes constitutes a first grid of parallel strips and the common regions of the transflective layer constitute a second grid of parallel strips which cross the strips of the first grid.
Claim 4
Dependent Claim
38 words
A display device as claimed in Claim 1 or 2, characterized in that the pattern of resiliently connected electrodes constitutes a first set of electrodes and the regions of the transflective layer constitute a second set of electrodes.
Claim 5
Dependent Claim
57 words
A display device as claimed in Claim 1 or 2, characterized in that the pattern of resiliently connected electrodes constitutes a first set of electrodes and a second supporting plate which is provided with a set of electrodes which is in registration with the regions of the transflective layer is spaced apart from the first supporting plate.
Claim 6
Dependent Claim
59 words
A display device as claimed in Claim 3 in which the electrodes of the first set are interconnected and the electrodes of the second set are strip-shaped, characterized in that a second supporting plate is spaced apart from the first supporting plate and has a third set of strip-shaped electrodes which cross the strip-shaped electrodes of the second set.
Claim 7
Dependent Claim
26 words
A display device as claimed in Claim 1, 2 or 3, characterized in that the display device comprises means to provide charge on the resilient electrodes.
Claim 8
Dependent Claim
54 words
A display device as claimed in Claim 6, characterized in that the first supporting plate forms part of a glass envelope comprising an electron gun to generate an electron beam directed onto the first supporting plate, which beam scans the first supporting plate according to a regular pattern and charges the resiliently connected electrodes.
Claim 9
Dependent Claim
42 words
A data processing device comprising a display device as claimed in Claim 6 or 7, a light source, and first optical means to obtain a parallel light beam which is incident on the display device, which display device modulates the incident light.
Claim 10
Dependent Claim
74 words
A projection television device comprising at least two display devices as claimed in Claim 6 or 7, each of which display devices is provided with a light source which emits light of one colour, first optical means to obtain a parallel light beam which is incident on the display device which modulates the incident light, and second optical means to project the modulated light on a screen which is common for the display devices.
Claim 11
Independent Claim
118 words
A method of manufacturing a display device as claimed in any of the preceding Claims, characterized by a) providing a pattern of a transflective material on a supporting plate, b) providing a layer of aluminium which can be etched with a first etchant, c) anodizing regions of the layer of aluminium which should remain connected to the supporting plate, d) electro depositing a layer of an electrode material which can be etched with a second etchant, e) providing an electrode pattern in the layer of electrode material by means of a photo-etching method and the second etchant, f) removing the non-anodized parts of the aluminium via the edges of the layer of electrode material with the first etchant.
Claim 12
Independent Claim
126 words
A method of manufacturing a display device as claimed in any of the preceding Claims 1 to 9, characterized by: a) providing a pattern of a transflective material on a supporting plate, b) providing a layer of aluminium which can be etched by means of a first etchant, c) removing regions in the layer of aluminium by means of a photo-etching method and the first etchant, d) electro depositing a layer of an electrode material which can be etchedby means of a second etchant, e) providing an electrode pattern in the layer of electrode material by means of a photo-etching method and the second etchant, f) removing the layer of aluminium via the edges of the layer of electrode material by means of the first etchant.
Claim 13
Dependent Claim
31 words
A method as claimed in Claim 10 or 11, characterized in that, after step e), the effective part of the electrodes of the electrode pattern is provided with a reinforcing layer.
References Cited (Backward Citations)
No citation records indexed.
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