摘要:
An image display apparatus comprises, in a vacuum container whose inside is kept under vacuum, a fluorescent layer, an electron emission source having a plurality of electron sources, a deflecting electrode to deflect electron beams emitted from the electron emission source, and an ultrafocusing electrode to focus the electron beams and land the focused electron beams on predetermined positions of the fluorescent layer. The ultrafocusing electrode is arranged between the electron emission source and the fluorescent layer while the deflecting electrode is arranged between the electron emission source and the ultrafocusing electrode, so that the fluorescent layer is illuminated by the electron beams. If the landing position of the electron beam is deviated because of errors such as manufacturing errors in assembling the components into the image display apparatus, the deviation is minimized and an image display apparatus with high resolution can be obtained.
摘要:
An image display apparatus comprises, in a vacuum container formed by a rear container and a front glass container, a fluorescent layer, an electron emission source, electrodes to control electron beams emitted from the electron emission source. The electrodes are formed by stringing wires on frames made of a resilient material, and the frames on which the wires are strung have respectively pairs of opposing sides that are flat plates formed on the same surface. The electrodes that are free from waviness or warping have high flatness, control the focusing and deflection of the electron beams appropriately, and prevent deviation of the landing positions of the electron beams and errors including error irradiation. Such an image display apparatus can provide excellent images and high resolution.
摘要:
A picture display device using direct heating type linear cathodes as electron beam sources. Inorganic material vibration prevention elements having a hole thereon are provided. The linear cathodes penetrate the vibration prevention elements at one end part or both end parts of respective linear cathodes. This damps vibrations occurring at the time when an external force is applied and cuase them to cease rapidly.
摘要:
A field discrimination circuit for use in a television receiver, which includes a shift register for shifting an input vertical synchronizing signal so as to produce n (n.gtoreq.6) pseudo vertical synchronizing signals having the same phase difference, a selector for selecting one of the n pseudo vertical synchronizing signals and delivering the selectd pseudo vertical synchronizing signal as a reference vertical synchronizing signal, a latch circuit for detecting input timing of the reference vertical synchronizing signal into one of n time sections obtained by dividing one horizontal scanning period by n, to thereby generate a latch output signal, and a decoder for effecting field discrimination on the basis of the latch output signal and generating a field discrimination signal.
摘要:
An AC plasma display device allows the display quality improved, to perform a write operation reliably and reduce a write operation period by reducing discharge delay at the write operation. Pairs of scan electrode and sustain electrode are arranged on a front substrate in parallel and covered by a dielectric layer. A protect film is formed on the dielectric layer. Data electrodes covered by an insulating layer are formed on a rear substrate. Partitions are located on the insulating layer in parallel with and between data electrodes. Conductive phosphor layers made of a mixture comprising an insulating phosphor material and a conductive material are formed from the surface of the insulating layer to each side of the partitions. Ignition gaps are defined between a surface of the protective film and peaks of the phosphor layer close to the surface.
摘要:
In an image display apparatus, horizontal-extended line cathodes (22a-22d), an electron beam extraction electrode (23), a control electrode (24), a first focusing electrode (25) having horizontal-elongated apertures (35, 45), a second focusing electrode (26) having vertical-elongated apertures (36, 46), a horizontal deflection electrode (27a, 27b), a vertical deflection electrode (28a, 28b) and a screen (29) are provided in this order toward a travelling direction of electron beam, and each of both deflection electrodes comprises a pair of comb-shaped conductive sheets which are insulatedly interdigitated with each other on the same vertical plane.
摘要:
A method of driving a plasma display device that includes a plurality of scanning electrodes, a plurality of sustaining electrodes, and a plurality of data electrodes is such that, when m is any given integer, the data electrodes are applied with a negative polarity pulse when a voltage applied to the scanning electrodes gradually decreases during the initialization period, if a final pulse in a sustain period of an (m−1)-th subfield is applied to the scanning electrodes and an m-th subfield includes an initialization period. If the final pulse in the sustain period of the (m−1)-th subfield is applied to the sustaining electrodes and the m-th subfield includes the initialization period, the data electrodes are applied with a positive polarity pulse when a voltage applied to the scanning electrodes gradually increases during the initialization period.
摘要:
A video image display apparatus comprising line cathodes for emitting electron beams, a phosphor screen having a phosphor layer which emits light at impingement by said electron beams, and a vacuum enclosure containing the above-mentioned components therein, wherein undesirable vibration is prevented by providing damping strings across and lightly touching the line cathodes for reducing the vibration of the line cathodes by their damping effect.
摘要:
The present invention provides a plasma display device for displaying a high quality image, and its driving method, with which the production cost and power consumption may be reduced and write errors may be suppressed. In the driving method, the length of the erase period D2 is T0+160 μsec, based on the number of sustain pulses being greater than or equal to 25 and less than 50 in the discharge sustain period C2. The length is set by a T1 setting unit according to the information on the number of the sustain pulses sent from a preprocessor in a driving unit, and a T1 table stored in a T1 table storage unit. The T1 setting unit sets T1=160 μsec referring to an extension time period T1 corresponding to the number of sustain pulses that is greater than or equal to 25 and less than 50 in the T1 table.
摘要:
A method of driving an AC plasma display panel for carrying out gray-scale display using a structure in which each field consists of a plurality of subfields, each of which includes an initialization period, a write period, and a sustain period. At least in one predetermined subfield out of the plurality of subfields, at least a part of a sustain operation in the sustain period and at least a part of an initialization operation in the initialization period in a subsequent subfield are carried out at the same time. The visibility of black is improved considerably and the contrast can be enhanced greatly.