Abstract: An image display device includes a flat evacuated envelope which has a front and a back wall. On the inner surface of the front wall is a phosphor screen for displaying the image. A first set of electron beam guides is between the back wall and the screen. A second set of electron beam guides is at one end of the first set of beam guides. A source of electrons is postioned to inject an electron beam into the second set of guides. A deflection means is provided to direct the electron beam from the second set of guides into the first set of guides.

Abstract: Across the screen is a mosaic of phosphor bodies which will emit light of different colors when excited by electrons. Phosphors which will emit three different colors, e.g. red, green and blue, are used and are disposed in a regular repetitive array of groups of three, i.e. triads. In every other triad the phosphor body which emits the color which has the least acuity to the eye, e.g. blue, is replaced by a nonluminescent black material. This black material is used to hide the edges of a support wall which extends to the screen.

Abstract: An evacuated envelope having a plurality of parallel channels extending along and between spaced front and back walls. Each channel contains a plurality of parallel beam focusing guides, each of which is adapted to receive a beam of electrons at one end of the channel and confine the electrons in the beams as the beam flows through the focusing guide and to selectively deflect the beam toward a phosphor screen on the front wall of the envelope at a plurality of points along the channel. At each side of each channel is an electrode which extends from the front wall to a point spaced from the beam focusing guides. The electrodes are electrically connected to the phosphor screen and with the focusing guides serve to create an electrostatic field which fans out the paths of the electron beams emitted from the focusing guides so as to spread out the beams across the entire lateral dimension of the channel.