EP0154662A1 - Dispositif d'affichage optique par ligne - Google Patents

Dispositif d'affichage optique par ligne Download PDF

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Publication number
EP0154662A1
EP0154662A1 EP84102878A EP84102878A EP0154662A1 EP 0154662 A1 EP0154662 A1 EP 0154662A1 EP 84102878 A EP84102878 A EP 84102878A EP 84102878 A EP84102878 A EP 84102878A EP 0154662 A1 EP0154662 A1 EP 0154662A1
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EP
European Patent Office
Prior art keywords
line
display device
light
delay lines
lines
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Withdrawn
Application number
EP84102878A
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German (de)
English (en)
Inventor
Hans Werba
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Individual
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Individual
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Priority to EP84102878A priority Critical patent/EP0154662A1/fr
Publication of EP0154662A1 publication Critical patent/EP0154662A1/fr
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2007—Display of intermediate tones
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/2085—Special arrangements for addressing the individual elements of the matrix, other than by driving respective rows and columns in combination

Definitions

  • the invention relates to a line-shaped optical display device for displaying information.
  • Line-shaped optical display devices can be used as such, for example for displaying a modulation intensity or the like. However, they can also be put together to form a flat display device, for example a screen. Conventional display devices use a matrix-like control in the row and column direction in both cases in order to be able to illuminate a specific point of the display device in a controlled manner.
  • Each pixel consists of a small gas discharge path at the point of intersection between a certain row electrode and a certain column electrode. If a pixel is to be illuminated, a voltage is applied to the associated row electrode and the associated column electrode, these two voltages being dimensioned such that the resulting potential difference is greater than the ignition voltage for the luminous gas discharge. However, the voltages applied to the row and column electrodes are not in themselves sufficient to ignite a luminous gas discharge. If you want to get a variable display, you have to cyclically control the entirety of the pixels, each time corresponding to the image to be displayed. Bring the pixels of the screen to light by appropriately controlling the row and column electrodes. This control of the individual pixels requires a relatively large amount of control. In addition, it is impossible, but at least extremely problematic, to make such a plasma screen compatible with conventional television transmission systems.
  • a line-shaped optical display device is to be made available which can be operated with less control effort and which, when used as a flat screen, enables compatibility with conventional television transmission systems in a relatively simple manner.
  • the coincidence of the two pulse groups is determined at another pair of longitudinal positions.
  • the selection of the longitudinal position pair at which the coincidence of the pulse groups is determined depends on the phase difference between the two pulse groups at the beginning of the line. By controlling this phase difference, it can now be achieved that the coincidence occurs at the desired selected longitudinal position pairs.
  • This position selection of the coincidence along the two delay lines can now be achieved by a controllable phase change device, by means of which the phase differences of the pulse groups at the beginning of the line can be controlled depending on the desired coincidence position along the delay lines
  • phase shifter can also assign a phase shifter to each of the two delay lines.
  • two light pulse sources will preferably be used and the phase change device used to control the time interval between the delivery times of the light pulses supplied by the two pulse sources and fed into the two light guides.
  • the display device With the display device according to the invention it is now possible either to selectively illuminate discrete light sources or to illuminate a continuous luminous medium at desired locations.
  • two pairs of consumers are formed along the two delay lines, the two consumers of each pair of customers, with the exception of one pair, being at different distances from the beginning of the lines if both delay lines are designed for the same group speeds.
  • the distances from the lines of the lines can be the same for all pairs of customers if the two runtime lines are designed for different group speeds.
  • delay lines that are designed for the same group speeds the differences between the distances from the beginning of the line to the customers of a customer pair are also made different for the different customer pairs.
  • the two customers of each customer pair are connected to a coincidence detector assigned to this customer pair, preferably in the form of an AND gate.
  • a discrete light source is connected to the output of this coincidence detector, preferably in the form of a light-emitting diode (LED).
  • LED light-emitting diode
  • Discrete light sources can also be used in the event that the delay lines are formed by light guides.
  • the two light guides are ground at the discrete pickup positions or over their entire length, so that a radial light emission capability of the light guides is generated at the ground points. You can then use photodiodes at these ground pickup positions arrange, the electrical outputs of the two photodiodes belonging to a pair of consumers can be connected to the inputs of an AND logic circuit, to the output of which a discrete light source, preferably in the form of an LED, is connected.
  • the two delay lines are designed for different group speeds.
  • the coincidence of the two pulse groups fed along the two delay lines then depends on the phase difference with which the two pulse groups were fed into the two delay lines.
  • the location at which coincidence occurs between the two pulse groups that run through the two delay lines depends in each case on the phase difference that has been set for the two pulse groups at the beginning of the line by means of the controllable phase change device.
  • a luminous medium is used which can only be illuminated when the two pulse groups sent through the delay lines coincide, but not at all other locations.
  • the location along the two delay lines at which light is to be generated can now be determined with the aid of the control signal supplied to the phase change device.
  • a luminous point migrate from luminous point to luminous point by supplying the phase change device with a step voltage as a control signal. From level to level of this staircase voltage, the red dot along the two runtime lines will gradually advance towards the end of the line.
  • the phase changing device is supplied with a constant control signal for as long as the lighting is to continue at this specific point.
  • the light / dark control and the brightness control are preferably achieved with the help of an AND gate, which is connected between the output of the pulse source and the inputs of the delay lines.
  • the output of the pulse source is connected to an input of the AND gate, while the light control signal is applied to the other input of the AND gate. If two pulse sources are used, each of which feeds one of the two delay lines, an AND gate is assigned to each pulse source, whereby both AND gates are opened with the same light control signal.
  • a color display can be achieved by using three display lines according to the invention, each display line being assigned a different basic display color, preferably the three basic colors red, green and blue.
  • each display line being assigned a different basic display color, preferably the three basic colors red, green and blue.
  • a single phase change device and a single brightness control device are required, which act in parallel on all display lines.
  • a controllable switch is connected at least before the input of one of the two delay lines of each display line, the control connection of which is connected to a line selection device.
  • the row selection device By means of the row selection device, the individual A n Selfezeilen be sequentially activated.
  • the image to be displayed on the flat screen is thereby displayed line by line, as is the case with a conventional television receiver.
  • the line selection device either has its own clock, the clock pulses of which are preferably counted using a counter contained in the line selection device, each count value corresponding to the activation of one of the switches assigned to the individual display lines.
  • the line selection device can also be supplied with an external clock via an external control connection, for example the line synchronization signals which are derived from the received television signal in conventional television receivers.
  • an external control connection for example the line synchronization signals which are derived from the received television signal in conventional television receivers.
  • the flat screen according to the invention is compatible with the conventional television transmission system, so that such a screen could easily be used in the context of the conventional television transmission system.
  • the individual display lines can each be replaced by a triple color display line.
  • the display device can be realized with different light sources.
  • Kerr cells can be used in addition to the light-emitting diodes already mentioned, to which electrical potentials are supplied with the aid of the two delay lines, which are preferably designed as strip lines.
  • the transparency of each Kerr cell for the transmission of the light from this light source to the viewer depends on whether on a specific pair of customers, i.e. on a specific Kerr -Cell, coincidence of the pulse groups running over the delay lines occurs or not.
  • the Kerr cells not only the Kerr cells but also the runtime lines that interact with them are made of transparent material.
  • a display device with a luminous medium arranged between the two delay lines over their entire length can be realized with different luminous media.
  • One possibility is to use a glow discharge gas between high-frequency delay lines that are designed for different group speeds.
  • the pulses with different polarity are fed into the two delay lines and the voltage amplitude of the high-frequency pulses fed into these delay lines is selected so that the sum voltage occurring when two pulses coincide is above the ignition threshold value of the glow discharge gas, but the voltage value of each pulse is both below the ignition voltage threshold as well as below the voltage value that is required to maintain a glow discharge once ignited.
  • a glow discharge occurs at that point on the display line at which coincidence occurs between the pulses passing through the two delay lines, the coincidence point being able to be selected with the aid of the phase control signal.
  • the glow discharge gas used does not emit visible radiation or light in the desired color during a glow discharge
  • a fluorescent material can be used in addition to the luminous medium, with the aid of which the radiation released during the gas discharge is converted into visible light of the desired color can.
  • Such two-stage stimulating phosphors are excited, for example, with ultraviolet rays into a first energy level and can then be excited to emit light with a different type of radiation.
  • phosphors is reported for example in the European patent application with the publication number 0056639.
  • Such a phosphor as a luminous medium can be used in connection with two light guides as delay lines.
  • the two runtime lines are designed for different group speeds. Pulses of the radiation exciting the phosphor in the first energy level are fed into one light guide, while the radiation exciting the phosphor into the second energy level is fed into the other light guide. At that point along the two transit time lines at which coincidence of the radiation pulses fed into the two light guides occurs, there is a glow.
  • a phosphor is used which has lost its excitation energy again after a time corresponding to the length of the delay lines.
  • light guides with radial radiation capability are required, which can be achieved by grinding the opposite sides of the two light guides.
  • a further possibility for realizing such a display device according to the invention is to use a luminous medium / which can be brought into a luminous state by exposure to a light of a first type, for example UV light, in accordance with the Gudden Pohl effect, which can be brought about by exposure to a light of a second type, for example infrared light, can be extinguished again.
  • a light of a first type for example UV light
  • a second type for example infrared light
  • the Er invention one light guide is traversed by UV pulses, while the other light guide is continuously exposed to infrared light, which is only interrupted by an infrared light gap pulse passing through this light guide. Only at that location along the transit time lines, at which the coincidence between the UV pulse on one light guide and the light gap pulse on the other light guide, does the luminous medium light up briefly. At the other points, the simultaneous exposure to the illuminating medium with the UV light and the infrared light ensures that either it does not come to light or the lighting state is deleted again.
  • the pulse groups are fed into the two line ends with the same or with opposite polarity. In the case of luminous media or light sources in which the energy accumulation at the point of coincidence of the two pulse groups running in opposite directions through the delay line is important, the pulse groups will be fed in with the same polarity.
  • the display device according to the invention can be used advantageously for an analog / digital converter.
  • the phase change device is controlled with the analog signal to be converted into digital values.
  • the location of the coincidence of the pulse groups that run through the two delay lines or the only delay lines then depends on the instantaneous value of the analog signal. This means that the respective point of coincidence at which light emission occurs is a measure of the respective analog signal value.
  • a certain light pattern is produced from a luminous light source and non-luminous light sources.
  • strip-shaped light detectors can be arranged along the delay lines, for example in the form of strip-shaped photodiodes.
  • the individual light sources or the luminous medium itself can be designed as a storage medium by using the light sources or the luminous medium assigns a luminescent phosphor or uses a luminescent phosphor as a luminous medium.
  • the afterglow duration should be at least as long as the transit time of the light pulses through the transit time lines. After the pulses have passed through the delay lines, a light pattern is available along the delay lines or the only delay line depending on the analog signal value to be implemented, which light pattern can then be adopted in a memory after a photoelectric conversion in the form of an electrical quantization pattern.
  • the display device shown in FIG. 1 has two delay lines La, Lb, both of which are designed for the same group speeds.
  • the upper delay line La is provided with five customers Aa1, Aa2, ..., Aa5 and the lower delay line Lb has five customers Abl, Ab2, ... Ab5.
  • the consumers of the two delay lines La and Lb form associated customer pairs Aa1 and Ab1, and Ab2, ..., Aa5 and Ab5.
  • the distances between the customers Aa1, Aa2, ... of the delay line La are greater than the distances between the customers Ab1, Ab2, ... of the delay line Lb.
  • the two customers Aa1 and Ab1 of the first pair of customers have the same distances from the line starts 10 or 11 of the delay lines La or Lb.
  • the customers of all other pairs of customers are at different distances from the line starts 10 and 11, respectively.
  • the difference between the distances of the customers of a pair of customers from the beginnings 10 and 11 of the delay lines La and Lb for the different customer pairs is also different.
  • the consumers of each pair of customers are connected to the two inputs of an AND logic circuit, to the output of which a light source 6 1 , 6 2 , ..., 6 5 is connected.
  • Fig. 1 only five pairs of customers are shown. In practical embodiments of the display device according to the invention, however, a much larger number of pickup pairs is preferably used. If the display line shown in FIG. 1 is used in a flat screen, 512 pickup pairs are provided along the display line, for example.
  • Electromagnetic pulse groups are fed into the beginning of lines 10 and 11 of the two delay lines La and Lb, which come from a pulse source 1.
  • An input E1 of an AND gate 2, which has a second input E2 is connected to the output of the pulse source 1.
  • the line start 10 of the delay line La is directly connected to the output A of the AND gate 2 and the line start 11 of the delay line Lb is connected via a series circuit comprising a phase shifter 3 and a polarity converter 7.
  • the phase shifter 3 has a control connection E3.
  • the polarity converter 7 is designed as a transformer.
  • the two delay lines La and Lb are each terminated with an impedance Za or Zb, the impedance value of which is terminated with the characteristic impedance of the associated delay line La or Lb, in order to avoid disturbing reflections at the end of the delay lines.
  • the embodiment shown in FIG. 1 has electromagnetic delay lines, for example in the form of coaxial lines, strip lines, LC elements or the like, and is fed with electromagnetic pulse groups in the form of high-frequency (RF) pulses.
  • RF high-frequency
  • a phase voltage is supplied to the phase shifter 3 via the control connection E3, as is shown in line E3 of FIG.
  • the phase shifter 3 is designed, for example, so that it has a control signal zero at the control input E3 causes no phase difference between the two pulses fed into the delay lines La and Lb, so that in this case coincidence of the pulses occurs on the pair of consumers Aa1, Ab1 on the two delay lines La and Lb and the light source 6 1 lights up.
  • the second discrete light source 6 2 should light up, for example, the third discrete light source 6 3 , etc. in the second stage of the staircase signal
  • the temporal relationship between the step lengths of the staircase voltage and the spacing of the pulses from the pulse source 1 is preferably chosen so that a certain number of pulses can be fed into the delay lines per step length.
  • gate opening pulses which are fed to the second connection E2 of the AND gate 2 and are shown in line E2 in FIG. 2, for example, the number of pulses from the pulse source 1 passing through the AND gate 2 per step can now be controlled . If the pulses from pulse generator 1 are blocked for the entire duration of a stair step, the light source assigned to this stair step remains dark.
  • the effect of the luminous intensity on the viewer of the display device is greater the more pulses from the pulse source 1 per stair step reach the associated light source and this light source is accordingly often illuminated. So not only is a dark / light control but also a brightness control with fine brightness gradations, such as are desired for a television picture, possible.
  • the light sources 6 1 , 6 2 ' ... can even be used as AND logic circuits, for example by using glow discharge lamps as light sources, the ignition threshold of which can only be exceeded by a voltage which is opposite when the two pulses occur together Polarity arises over the glow lamp.
  • the voltage amplitude of the pulses is selected so that when a voltage pulse occurs only on one pickup of a pair of pickups, neither the ignition threshold nor the ignition hold threshold, beyond which a glow discharge lamp which has been ignited once can be kept in the ignited state, is reached.
  • the individual glow discharge lamps 6 1 , 6 2 ,... Can also be replaced by a glow discharge line with a large number of adjacent glow cells, the individual glow cells being connected to a pair of consumers.
  • the embodiment of a display line shown in FIG. 1 can also be implemented with light guides as delay lines La and Lb.
  • light pulses which preferably originate from two separate light pulse sources, preferably laser sources, are fed into the line starts 10 and 11.
  • the light pulses are fed into line starts 10 and 11 at different times, the time difference between the two light pulse feeds being controllable, for example depending on the phase difference control signal shown in line E3 in FIG. 2.
  • the required AND gates 2 are either formed by optical AND gates or by electrical AND gates, each of which a photoelectric converter is assigned on the input side and output side.
  • light guides with radial radiation capability are used, which is achieved, for example, by grinding the light guides over their entire length or at the customer points.
  • Fig. 3 shows an embodiment of a display line according to the invention, in which the Kerr effect is used.
  • a large number of Kerr cells are combined to form an integrated Kerr row.
  • Each Kerr cell has two Kerr electrodes, namely an upper (in FIG. 3) upper Kerr electrode 13 and a lower (in FIG. 3) lower Kerr electrode 23.
  • Each of these Kerr electrodes has the shape of a strip conductor piece.
  • the Kerr electrodes 13 and 23 are each connected to adjacent Kerr electrodes 13 and 23 via an inductor 19 and 19 ', which is preferably arranged as an inductance coating on a strip-shaped dielectric 15 and 25, respectively. These dielectric strips 15 and 25 also form the substrates for the Kerr electrodes 13 and 23.
  • a Kerr medium for example nitrobenzene, is located between the Kerr electrodes 13 and 23.
  • the Kerr medium 31 can be separated by individual cell walls 29 between the individual Kerr cells.
  • the upper Kerr electrodes 13 together with the inductance coatings 19 form the one delay line La, while the lower Kerr electrodes 23 together with the lower inductance coatings 19 'form the other delay line Lb.
  • High-frequency pulses are fed into the beginning of lines 10 and 11 of these two delay lines La and Lb.
  • this display device On the side facing away from the viewer of this display device there are one or more strip-shaped light sources arranged individual light sources, the light of which is only visible on the observer side when a certain voltage is above the Kerr electrodes 13, 23.
  • the polarizers customary in Kerr cells are not shown in FIG. 3.
  • the Kerr-line and fed into the line beginnings 10 and 11 pulses are chosen so that only DER jeni g en Kerr cell, electrodes Kerr coincidence of two pulses injected into the delay lines La and Lb occurs at the light for Viewer is let through.
  • FIG. 4 shows an embodiment with two delay lines La and Lb, between which a luminous medium 9 is located.
  • the delay lines La and Lb have neither discrete pickup pairs nor discrete light sources.
  • the two delay lines La and Lb are designed for different group speeds. This means that if the pulses are fed into the two delay lines La and Lb in phase, the two pulses will coincide at line beginnings 10 and 11 and thus the luminous medium 9 will light up at the beginning of the display line shown in FIG. 4. If there is a phase difference between the pulses fed into the two delay lines La and Lb, lighting occurs at some other location along the display line, this location depending on the respective phase difference.
  • the embodiment shown in FIG. 4 can be implemented with electromagnetic delay lines when high-frequency pulse groups are fed in or with optical fibers when light pulses are fed in. First, the implementation with electromagnetic delay lines and high-frequency pulses is considered.
  • a luminous medium 9 in the form of a glow discharge gas is used as the luminous medium, the two delay lines forming the two discharge electrodes.
  • the high-frequency pulses are fed into the two delay lines La and Lb with opposite polarity, for which purpose one of the two line starts 10 and 11 is preceded by a polarity converter, for example in the form of the transformer 7 shown in FIG. 1.
  • the amplitudes of the high-frequency pulses fed into the two delay lines La and Lb are chosen so that their voltage difference at the point of coincidence is above the ignition threshold value of the glow discharge gas, but the amplitude of each of these high-frequency pulses both below this ignition threshold and below the discharge hold threshold, above that a glow discharge once ignited is maintained.
  • a glow discharge can only occur at the location of the coincidence of the pulses on the two delay lines La and Lb, while there is no such glow discharge at the remaining locations along the delay lines.
  • the line part shown in FIG. 1 to the left of these line starts can be connected to the line starts 10 and 11.
  • the light guides functioning as delay lines La and Lb must have a radial radiation capability, which is achieved again, for example, by grinding the light guides on opposite sides. As a result, light or radiation energy can enter the luminous medium 9 arranged between the light guides and excite it to light up.
  • a substance is selected as the luminous medium 9 which can only be excited to light up when the light or radiation pulses fed into the two delay lines coincide, but not through the light or radiation pulse on only one delay line.
  • an example of this is a two-stage stimulable phosphor which has already been mentioned in the introduction and is excited, for example, by UV light to a first, non-radiating energy state and by additional irradiation by visible light or infrared light to a second, luminous or radiating state.
  • the phosphor should at least have lost the excitation energy absorbed by one or the other pulse radiation after a time corresponding to the length of the delay lines, so that pulses that subsequently enter the Runtime lines are fed in, do not cause the lighting medium to light up in places where there is no coincidence for the subsequently fed pulses.
  • a further possibility for realizing the embodiment shown in FIG. 4 is to use a luminous medium which shows the Gudden-Pohl effect.
  • a luminous medium is, for example, CaS: (Bi) phosphor.
  • the mode of action of a phosphor having this effect has already been described in the introduction.
  • light guides with radial radiation capability are used again, which is again caused, for example, by longitudinal grinding of the light guides on opposite sides.
  • the luminous medium 9 can be used together with a dye which converts the radiation generated by the luminous medium 9, be it in the form of visible light or other radiation, into visible light of a desired wavelength. This is particularly necessary if you want to create a specific color with a display line.
  • a colored display device is intended which can be composed of three display lines according to the invention, each of which shines with a different basic color, preferably red, green and blue. In this way, a color display line can be realized.
  • the three finelines of this color display line can be operated with a common phase change device so that the location of the coincidence is the same for the three colors to be overlaid for color display.
  • the three individual lines of this color display line are operated with separate brightness control devices, so that one can influence the proportions of the primary colors in the color to be displayed.
  • a particularly advantageous application of the invention consists in a flat screen which is composed of a plurality of display lines according to the invention.
  • a flat screen is constructed with 512 lines, each of which preferably has a line length equal to the total height of all display lines.
  • Such a flat screen can be designed as a color screen by constructing it from color display lines of the type described above, which each comprise three individual display lines with the different display colors red, blue and green.
  • Such a flat screen can be controlled in two different ways.
  • One is to control all display lines in parallel, as has already been mentioned.
  • a phase change device and a brightness control device are assigned to each display line.
  • a parallel control With such a parallel control, a very rapid image change is possible, since the entire image content is possible after a period of time corresponding to the runtime through the individual runtime lines.
  • FIG. 5 shows four display lines, each with two delay lines La1, Lbl; La2, Bb2; ... shown, whereby a flat screen will have a lot more display lines in practice.
  • the circuit part shown in FIG. 1 to the left of line beginnings 10 and 11, with respect to its functioning reference is made to the corresponding explanations in connection with FIG. 1 . 1 with the pulse source 1, the AND gate 2, the phase shifter 3 and possibly the polarity converter 7 is connected in the embodiment shown in FIG. 5 to connection points Va and Vb.
  • connection point Va is connected to the line starts 10 1 , 10 2 , ... 10 4 of the upper delay lines La1, La2, ... La4 of each display line via a controllable switch 33 1 , 33 2 , ... 33 4 , which for example by a switching transistor, a thyristor, an AND gate or the like.
  • the line starts 111, 11 2 , ... 11 4 of the respective other delay lines Lb1, Lb2, ... Lb4 are jointly connected to the connection point Vb.
  • Control connections S1, S2, ... S4 of the switches 3 3 1 , 33 2 , ... 33 4 are connected to control outputs SA1, SA2, ... SA4 of a line selection device 39.
  • the individual display lines are activated in sequence by means of the line selection device 39 and the switches 33 1 , 33 2 ,.
  • the display location information generated with the aid of the phase shifter 3 and the brightness control information generated with the aid of the AND gate 2 is provided for all display lines at the same time, but is only effective for one display line at a time due to the line selection control.
  • the line selection device 39 has a control connection E4, with which the line selection device 39 has line control pulses can be supplied.
  • These line control pulses can be, for example, the line pulses which are derived from the received television signal in conventional television sets.
  • the line selection device preferably contains a counter with which the individual line pulses are counted. Depending on the respective count value of this counter, a certain control output SA1, SA2, ... is then acted upon with a switch control signal.
  • the embodiment shown in FIG. 5 enables the operation of this flat screen to be compatible with conventional television systems in a simple manner.
  • the suitability of the flat screen of the type according to the invention is thus not only limited to, for example, computer terminals, but is also suitable for receiving existing television programs.
  • the invention therefore makes available a display device which has a pair of delay lines per display line, into which the same pulse groups with a controllable phase difference can be fed.
  • Discrete light sources or a luminous medium present along the entire runtime line lengths can then be used at display locations which are assigned to one another along both runtime lines and for which the pulses from the line starts have different group runtimes are made to light up when there is a coincidence of the two pulse groups running through the delay lines at this display location.
  • the location of such a coincidence along the delay lines depends on the controllable phase difference with which the pulse groups are fed into the two delay lines.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
EP84102878A 1984-03-15 1984-03-15 Dispositif d'affichage optique par ligne Withdrawn EP0154662A1 (fr)

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EP84102878A EP0154662A1 (fr) 1984-03-15 1984-03-15 Dispositif d'affichage optique par ligne

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994019788A1 (fr) * 1993-02-19 1994-09-01 Gold Robert J Procede et appareil d'adressage d'affichages matriciels
WO1996015519A1 (fr) * 1994-11-09 1996-05-23 Off World Laboratories, Inc. Ecran video et appareil et procede de commande
EP0814454A2 (fr) * 1996-06-19 1997-12-29 Sun Microsystems, Inc. Méthode et dispositif d'adressage activé par bande d'amplitude d'un réseau d'éléments
WO2010064184A1 (fr) * 2008-12-05 2010-06-10 Philips Intellectual Property & Standards Gmbh Delo avec structure de retard intégrée

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB823219A (en) * 1954-12-23 1959-11-11 Philips Electrical Ind Ltd Improvements in or relating to position-selecting, scanning and like systems
FR1334553A (fr) * 1962-06-30 1963-08-09 Electronique Et D Automatique Procédé et dispositifs de présentation graphique ou visuelle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB823219A (en) * 1954-12-23 1959-11-11 Philips Electrical Ind Ltd Improvements in or relating to position-selecting, scanning and like systems
FR1334553A (fr) * 1962-06-30 1963-08-09 Electronique Et D Automatique Procédé et dispositifs de présentation graphique ou visuelle

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994019788A1 (fr) * 1993-02-19 1994-09-01 Gold Robert J Procede et appareil d'adressage d'affichages matriciels
US5519414A (en) * 1993-02-19 1996-05-21 Off World Laboratories, Inc. Video display and driver apparatus and method
WO1996015519A1 (fr) * 1994-11-09 1996-05-23 Off World Laboratories, Inc. Ecran video et appareil et procede de commande
EP0814454A2 (fr) * 1996-06-19 1997-12-29 Sun Microsystems, Inc. Méthode et dispositif d'adressage activé par bande d'amplitude d'un réseau d'éléments
EP0814454A3 (fr) * 1996-06-19 1998-04-01 Sun Microsystems, Inc. Méthode et dispositif d'adressage activé par bande d'amplitude d'un réseau d'éléments
WO2010064184A1 (fr) * 2008-12-05 2010-06-10 Philips Intellectual Property & Standards Gmbh Delo avec structure de retard intégrée
CN102239512A (zh) * 2008-12-05 2011-11-09 皇家飞利浦电子股份有限公司 具有集成的延迟结构的oled
JP2012511172A (ja) * 2008-12-05 2012-05-17 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ 遅延構造体を組み込まれた有機発光ダイオード
US8686660B2 (en) 2008-12-05 2014-04-01 Koninklijke Philips N.V. OLED with integrated delay structure
CN102239512B (zh) * 2008-12-05 2014-12-17 皇家飞利浦电子股份有限公司 具有集成的延迟结构的oled

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