JPS6291992A - Multiresulutions addressed display - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a display suitable for displaying signals of arbitrary resolution in a display that displays each picture element in a +J selection type. .

[Background of the invention]

Image display devices such as televisions have been developed in a variety of ways depending on their purpose, ranging from projection types of 100 inches or more, viewfinders of 1 to 2 inches, and thin types using liquid crystals. ing. Furthermore, as described in Japanese Patent Application Laid-Open No. 57-135590, a thin type display divides the screen into a plurality of sections in the vertical direction, generates a pressure electron beam for each section, and directs each electron beam in four orthogonal directions. It is known that a television screen image is displayed as a whole by deflecting the light to a plurality of lines and displaying a plurality of lines.

The display of the above method is considered to be one of the effective methods for making televisions thinner. However, CA DlCA
Adaptation to narrow displays such as M etc. has a limit of 16 in terms of beam convergence, and it is thought that it is not as good as the generally known display plow yf (hereinafter referred to as CDT). Therefore, a display device that is thin and capable of high r1m display has been considered, and will be explained using FIGS. 4 to 6.

FIG. 4 shows the arrangement of divided unit screens. Note that although there are gaps between the unit screens in the figure for convenience of explanation, there are no gaps on the display screen. FIG. 5 is a diagram showing the display system of the unit screen, in which 51 is an electron gun;
2 and 53 are horizontal and vertical electrostatic deflection plates, and 54 is a display image.

Here, the electron gun is the above-mentioned CDT (Charactgr
It has the same configuration as Dippray Tubs). FIG. 6 shows the configuration of one pixel on the display surface.

Next 1cm! +Explain the work.

The entire screen is divided into two unit screens horizontally and vertically, as shown in FIG. 4, and each unit screen is divided into two unit screens, as shown in FIG.
5, the rask is deflected in a staircase waveform of 3 stages in the horizontal direction and m stages in the vertical direction. Here, the horizontal deflection frequency firv of the unit screen is 1. ,, is determined by = &. fHI) is the horizontal deflection frequency of the input signal.

Further, the vertical deflection frequency frU of the unit screen is equal to the vertical deflection frequency fyn of the input signal. That is, an electron beam is generated and focused by an electron gun 51, and an electron beam 52
, 55, horizontally from 1 to 1 in FIG.
Each dot of vertical 1 to rIL is irradiated. Furthermore, in the horizontal direction, each dot is sequentially turned to the side in three stages: RoG and H.
Display color images. The data for both prefectures at this time is read out from the memory for all dots provided for each unit screen. Note that the memory installed in each unit is replaced in synchronization with the input signal.

With the above system, it is possible to select colors without using a shadow mask, and the time that the electron beam is irradiated on one dot of phosphor is twice as long as in the case of a normal CDT. If the brightness is the same as a normal CDT, the beam current can be extremely reduced. Therefore, high-definition display is possible despite being thin.

However, in this display, the number of dots on the unit screen is C.
n, m), and also the number of units (i.

)), the resolution (signal specifications) is determined.

In other words, it becomes a display device paired with a signal, and no progress can be expected in the field of CAD/CAE, which uses a variety of signal specifications.

Note that the selected dot display method (ma) like this system
(including IJ box selection, etc.) is for TVs with clear signal specifications.
(standard systems such as NTSC, pAL, SECAM, etc.), and development is progressing for liquid crystal, plasma displays, etc.

As an example of a matrix type display device, for example,
5-79419, t! ! Examples include f-kansho 5b-2115.

[Purpose of the invention]

The purpose of the present invention is to eliminate the above-mentioned drawbacks of the prior art, and to provide arbitrary signal specifications (deflection frequency, resolution, etc.) within a predetermined range.
The purpose of the present invention is to provide a thin, cylindrical display with a selective dot display method that can be used for various purposes.

[Summary of the invention]

The display of the present invention has horizontal input.

It is characterized by determining the number of vertical lines and furthermore the number of horizontal dots from the vertical synchronization signal, and based on this information, determines the deflection frequency of the unit screen, and determines the effective display unit and its display area.

[Embodiments of the invention]

FIGS. 4 to 6, which illustrate the examples of the present invention described above, and
This will be explained in detail with reference to Figures 1 to 3 and Figures 7 to 8. Figure 1 is a diagram 1022 showing the configuration of the deflection signal control circuit for the unit screen of the present invention, and 1 is a diagram 1022 showing the configuration of the deflection signal control circuit for the unit screen of the present invention. il wave number counter, a three-digit total in number counter, 2 a unit polarization signal generator, and 4 a CPU 16 a polarization staircase wave generator.

Figure 2 is the total line Shuto Tsunta! , a specific circuit diagram of the HD frequency counter 1. FIG. 5 is a time chart diagram showing the operating waveforms of FIG. 2. FIG. FIG.

Consider a case where a horizontal synchronization signal fll jl s vertical synchronization @fy n and video signals R, G, and B are received as intervention force signals.

Here, display 1h: The period of one dot of the signal is display 1i! ! + is unknown.

Therefore, the position of one dot of each unit on the wooden display: The following algorithm is used to synchronize and display one dot when input.The unit deflection frequency fHU% deflection plate drive Phantom stairs (di fuss 79r)
:demand.

1 dot iF of input signal, aspect ratio when always displayed α
, the aspect ratio of the display area is assumed to be β, the horizontal and vertical ratios of the display period of the signal are δ.

The number of vertical lines is measured by the total line counter 3 shown in FIG. Specifically, fgn is input to the A input in FIG. 2, and frn is input to the B input. In FIG. 2, 31 and 52 are D-shaped lip 7Qy amplifiers (hereinafter referred to as DFF), and when a CP large input rising edge is input, the state input to the D input is transferred to the Q output. Further, the Q output is set to 11 when the R input is at a logic level Low (hereinafter referred to as tLe). 33c, 2 n-1 counter, the output of each stage is outputted as Ql...Qn. Also, when the R input is 1L°, all outputs Q1...Qn
or mLa. Numeral 34 is a Lubit latch, and each state is transferred to each Q by a rising edge input to the LD terminal. D F F 51 is set at the rise time t1 of B. The DFF 52 is set for the first time at time t, and the output becomes ・L. This mutual output resets the above-mentioned DFF 51 and the counter 33 at the same time, and the Q output becomes ℃L" at time t. 34 latches the output of the counter 33 at time t3 (before the counter 35 is reset at time t4, indicating the number of vertical ground lines) as shown in F in FIG. , the number of vertical lines is always displayed from time t4, except for a slight state transition period.

Assuming that the number of vertical lines obtained above is Nu, the total number of dots NDI for one horizontal period of the input signal is Nu#δNDI=3T7Nl.

Also, the dot configuration of the unit screen is the 6th one as mentioned earlier.
The configuration is horizontal and vertical as shown in the figure.

Here, if the horizontal display period rate τU of the unit screen is the same as the input signal, the number of unit screens NU required to display all the input signals can be calculated as an integer rounded up to the nearest whole number.

Next, the horizontal deflection frequency fHI) of the input signal is determined.

fHD is detected by an HD frequency counter.

The specific configuration of the HD frequency counter is the circuit shown in FIG. 2, which has the same configuration as the total line counter 3 described above, with the A input receiving the pulse (fill) at the reference time and the A input receiving the reference time Traf pulse (
The period is clear, such as a 1-second period pulse, and input i, , (related to Trg7). Here Trεf=1zac
In this case, the output F of the latch S4 can detect fin in units of gz.

From this, the deflection frequency fllU of the unit screen is f.

= or -, 2) N.U. is required.

ftttt is fHl by the unit deflection signal generator 2.
) is obtained by dividing by NU. Specifically, this can be realized by the circuit shown in FIG. Reference numeral 21 is a presettable subtraction counter, which inputs the information of NU when the result of the calculation of vIj is that all 7 lip flops of each digit are 'L'KTI (when the hanging output B becomes 1〃1). By presetting from D1 to D, the input signal HD can be divided into Nu stations.

Here, the results of the above-mentioned equalization line counter 5 and HD frequency counter 1 are read out, and the calculation of the above formula (11, Kg and
unit deflection signal generator) jl (Nt
t) is controlled by the CPU 4.

Next, find the frequency f SS of the horizontal direction plate and driving staircase wave. When the dot configuration is vertical stripes of each color as shown in FIG. 6, fzss needs to be exactly the same as the dot frequency of the input video signal. (If the dot configuration is a horizontal stripe of each color, flsl is exactly τ times the dot clock; for other dot configurations, the calculation is based on the same algorithm.) From the above, flsg is calculated as firss = x s - (s + le x However, as mentioned above, fuss needs to be accurately synchronized with the pressure input signal, but τU1 to obtain the above equation (3) α and β to obtain the NDH in equation (1)
, τ, and δ are estimated values from general display signals. Therefore, fgss needs to be fine-tuned by observing the screen. The method of gJJl adjustment will be explained below. First, a specific circuit of the deflection staircase wave generator 6 is shown in FIG.

Figure 8 shows the generally known PLL (Phas
e Locked Loop), and detailed explanation will be omitted. 61 is a bamboo phase detector, 62 is a low-pass filter (L
pF), 63 is a voltage controlled oscillator (VCO), 65 is an inverter, and 64 is a presettable counter, which performs the same operation as in FIG.

The operation is performed by inputting a preset value (D,..., 1) to the presettable subtraction counter 64 synchronized with the frequency of f and σ.
n) times the frequency fuss.

Therefore, fine adjustment is performed by sequentially setting the presettable constant of the presettable subtraction counter 64 to CP while observing the screen.
U4 may be used to perform addition or subtraction.

Furthermore, in the above system, unit screens and dots on unit screens that are not effective for display are blanked.

Note that any combination of effective unit screens may be used as long as the input video signal can be displayed normally.

In the specific circuits shown in Figures 2, 7, and 8 above, for convenience of explanation, we have specified counter addition, subtraction, flip-flop type, and input conditions.
As long as the operation algorithm is the same, the type and input conditions do not matter.

Also, fH13 was obtained by multiplying fxv, but the formula +11
(21, 131) may be obtained directly from fHD.

〔Effect of the invention〕

If the multi-resolution compatible display of the present invention is used, it can be used as a promising matrix selection type display for pan-top thin displays with arbitrary signal specifications (one direction frequency,
resolution, etc.) can be displayed by simply receiving a synchronization signal and a video signal (the synchronization signal may be superimposed on the video signal, but a synchronization signal separation circuit is required).

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of the deflection signal control circuit for the unit screen of the present invention, and FIG. 2 is a block diagram showing the specific circuit configuration of the input number counter 5 and the HD frequency counter 1. 3 is a time chart showing the operation of FIG. 2, FIG. 4 is an explanatory diagram showing the configuration of the unit screen, and FIG. 5 is a deflection system including the electron gun on the unit screen. FIG. 6 is an explanatory diagram showing the configuration of the unit screen, FIG. 7 is a block diagram showing the specific circuit configuration of the unit deflection signal generator, and FIG. The figure is a block diagram showing a specific circuit configuration of the deflection staircase wave generator. Explanation of symbols 1 is HD@fi number counter 2 is unit deflection signal generator 3 is total in number counter 4 is cpv 6 is deflection staircase wave generator 51.5
2 is a D-type 7 lip flop 53 is an addition counter 21 and 64 are subtraction counters 34
is the latch 22.65 is the inverter 51 is the electron gun 52, 53 is the electrostatic deflection plate 54 is the display surface
Reference numeral 61 indicates a phase detector 62, an a-pass filter 65, and a voltage controlled oscillator. Daishioiri Patent Attorney Katsutoshi Ogawa (12th, 11th, L)

Claims (1)

[Claims] 1) The display area of the display is horizontally and vertically i,
Each unit obtained by dividing into j equal parts (where i and j are each arbitrary integers) is equipped with a set of electron guns and horizontal and vertical deflection means, and each unit is equipped with:
In a display in which dots are selectively displayed in a stepwise manner by the deflection means of each unit, and the input video signal is displayed collectively in all units, means for detecting the number of vertical lines of the video signal from the input synchronization signal; The CPU also includes means for detecting a horizontal deflection frequency, a CPU, a unit deflection signal generating means controllable by the CPU, and a deflection staircase wave generating means also controllable by the CPU, and the CPU detects both of the above. The dot frequency of the input signal is calculated based on the detection signal of the means and setting information such as the display period rate and aspect ratio, and the unit screen N_u required to display all the input signals is calculated to deflect the unit. The unit deflection signal generating means determines the deflection frequency f_M of the unit screen from the number of unit screens N_u and a horizontal synchronization signal input separately.
_U and generates a unit deflection signal, and the deflection staircase wave generating means calculates the number of unit screens N supplied from the CPU.
The frequency f_■_S_S of the staircase wave for driving the horizontal deflection plate is determined from _u and the deflection frequency f_M_U of the unit screen supplied from the unit deflection signal generating means, and the deflection staircase wave of the unit screen is generated. A multi-resolution compatible display characterized by displaying dots of each unit in synchronization with the dot cycle of. 2) In the multi-resolution display according to claim 1, the effective horizontal unit screen number N_u
is an integer obtained by rounding up the decimal point of the value obtained by (Ne・δ)/(α・β・τ・n) (here, Ne is the number of vertical lines detected by the vertical line number detection means) output, τ, and δ are the horizontal and vertical display period ratios of the input signal, α is the aspect ratio of the input signal, β is the aspect ratio of the expected display area of the input signal, and n is the number of horizontal dots on the unit screen. show). 3) A multi-resolution compatible display according to claim 1 or 2, characterized in that the deflection frequency f_■_U of the unit screen is determined by f_■_D/N_u (however, f_■_ ＿
D indicates the horizontal deflection frequency of the input signal). 4) In the multi-resolution display according to claim 1, the output to the controllable deflection staircase wave generation means and the output to the unit deflection signal generation means, which are calculated by calculation, can be finely adjusted by the CPU. A display that supports multiple resolutions.