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AssigneeU.S. Philips Corporation
InventorsSiebe T. De Zwart, Nicolaas Lambert, Gerardus G. P. Van Gorkom, Petrus H. F. Trompenaars
Estimating the term…
A picture display device having a flat vacuum envelope which is provided with a transparent face plate with a luminescent screen and with a rear wall, which display device has an electron supply section with an electron source for emitting electron currents in a direction parallel to the face plate, and an active selection electrode section with first, preselection, electrodes and second, fine-selection, electrodes, located closer to the screen, for directing each electron current towards desired pixels on the luminescent screen. The fine-selection electrodes are divided into groups and corresponding fine-selection electrodes of at least two groups are interconnected in a series or parallel arrangement in such a way that the technology of providing these electrodes is as simple as possible and/or the possible fine-selection electrode patterns are such that the number of required selection drivers can be reduced considerably.
A picture display device having a flat vacuum envelope which is provided with a transparent face plate with a luminescent screen and with a rear wall, said display device comprising an electron supply section for emitting electron currents, and an active selection electrode section having first, preselection, electrodes and second, fine-selection, electrodes, located closer to the screen, for directing a plurality of electron currents towards desired positions on the luminescent screen, characterized in that:
A picture display device having a flat vacuum envelope which is provided with a transparent face plate with a luminescent screen and with a rear wall, said display device comprising an electron supply section having an electron source for emitting electron currents in a direction parallel to the face plate, and an active selection electrode section having first, preselection, electrodes and second, fine-selection, electrodes, located closer to the screen, for directing a plurality of electron currents towards desired positions on the luminescent screen, characterized in that the fine-selection electrodes comprise n groups of m electrodes each with a first and a second end, in that both the first ends of corresponding electrodes of at least two groups and the second ends of corresponding electrodes of at least two groups are connected in a parallel arrangement.
A picture display device having a flat vacuum envelope which is provided with a transparent face plate with a luminescent screen and with a rear wall, said display device comprising an electron supply section having an electron source for emitting electron currents in a direction parallel to the face plate, and an active selection electrode section having first preselection electrodes and second fine-selection electrodes, located closer to the screen, for directing a plurality of electron currents towards desired positions on the luminescent screen, characterized in that auxiliary electrodes for capturing unwanted electrons are arranged along the electron paths between the preselection and fine-selection electrodes and in that these auxiliary electrodes are arranged in the form of tracks each having a width corresponding to the width of an associated group of fine-selection electrodes.
A display device comprising an evacuable envelope and including a face plate bearing a luminescent screen having a multiplicity of predefined areas and means for selectively energizing respective ones of said areas to produce an image, said means comprising:
Dependencies are inferred from the claim text.