JPS58209783A - Display control system - 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] [Technical Field of the Invention] The present invention provides a display control method that maintains the brightness of the entire display device constant regardless of the display amount [Technical Background of the Invention and Problems thereof] As an example of a display device , CRT display monitors, CRT controllers, and CRT controllers can be easily removed using detailed drawings. Conventionally, a CRT display monitor and a CRT control unit are shown in FIGS. 1 and 2, respectively.
The friend is configured as shown in the figure.

That is, the content iq of the buffer memory 15 in which a display take for one screen or more is stored, and the horizontal and vertical synchronization signals (H8YNC) generated by the timing control circuit 16 under the control of the CRT controller 14.

Vitio signal (vrngo) is synchronized with V8YNC).
) and simultaneously fed to the CRT monitor.

The CRT monitor receives the video signal and the video amplification circuit 1
and generates a signal to be amplified and supplied to the CRT display 3. The CRT display 3 emits an electron beam corresponding to the received signal.

In addition, in order to align the entire electron beam horizontally and vertically, horizontal and vertical synchronization signals are applied to the deflection circuit 2, and the deflection coil 4t
- Generate a refined driving signal.

Is the high voltage output produced by 13 one child beam? It is necessary for the deflection to occur, and is normally made in synchronization with the deflection circuit 2, so it is included in block 2 here.

As described above, the contents of the buffer memory 15 are displayed on the CRTi screen 3 as a display screen intended to be controlled by the CRT controller 14.

Figure 3 is a timing chart showing the operation timing of the video signal and vertical synchronization signal for one frame and one intercostal space (for one screen). CRT mo! Depending on the evening specifications, TV
The wall thickness should be f'' large.

According to the above-mentioned CRT screen monitor and CFl'l' controller, the display rate varies depending on the amount of data written to the buffer memory 15. This situation is expressed by video signals VA-VD in the diagram. Vitio signal VA
At the time of taI7) Kanma Kyu is displayed, hereafter, 1IIF! 4i of the period display of TC, TD, respectively! This is assuming an i-ji meeting.

FIG. 4 shows the video signals VA to VD and C shown in FIG.
The brightness of the RT display screen is averaged 7 on the TV all the time.
This is an illustration of the situation. In the figure, Tfba1
During the frame period, L indicates brightness.

Figure 3, 4th evil? As you can clearly see, there should be a lot of displayed content.
It can be understood that the worse the f, the brighter the CRT display tube surface becomes. In other words, the display amount is proportional to the ψ stiffness of the CRT display tube surface.

If the operator handles all the displays where the display contents are constantly changing and the F yh capital on one screen is also constantly changing, the operator's eyes will be very tired. This also causes a decrease in operability for the operator.

[Purpose of the invention]

The present invention has been made based on the above-mentioned circumstances, and it eliminates the quality of brightness of the CRT display tube surface due to changes in display amount, and reduces eye fatigue. It is an object of the present invention to provide a display control method for a light display device.

[Summary of the invention]

The present invention includes a counter that counts the display value of one frame period (including the case of counting on 10 grams), and a brightness change of the display device according to the counter value. A signal to control? The f15 control unit that generates and controls the brightness of the CRT display tube is controlled so that the brightness of the CRT display tube surface is always constant regardless of the display amount indicated by the counter.

This not only reduces operator eye fatigue, but also ensures that the power consumption of the display device is approximately constant, making it operationally stable and constant. Can be provided.

[Example of invention]

FIG. 5 shows the implementation of the Nice Play control device in which the present invention is implemented. This is a block diagram. In the figure, only one part related to the present invention is extracted and shown on the back. It is called the display amount configuration control circuit 50 and will be explained here.

In the figure, 51 is a counter for counting display dots t, and outputs data 2 indicating display tAk. A video signal is supplied to the counter 51 from an external source via a line 501, and a video signal is supplied from the counter control circuit 52 via a line 501.
02 and the operation is started by obtaining the drive signal (DRV)'i. Counter control circuit 52! , f''1 A trigger signal (TR) for operating the external circuit 50' is supplied via line 503, and a vertical synchronization signal (VSYNC) or an equivalent signal is supplied via line 504.

The counter 51 output is supplied to the lightness determining circuit 53 via line 505. The lightness determining circuit 53 generates a control signal for controlling the entire brightness based on the amount of data supplied by the counter 51. Signal (LD) generated by the lightness determining circuit 53
is supplied to the lightness control circuit 54 through line 506. The lightness control circuit 54 controls the brightness of the CRT display tube surface based on the signal generated by the lightness determination circuit 53.
A video signal (VIDEO) is also supplied to the 07f valve.

Below, Section 5. The operation of the display amount detection control circuit 2 shown in A will be explained.

The counter 51 conveniently used in the present invention calculates the total display amount, and does not necessarily have to be a do-ware counter, and may be counted on a program.

52° is a control circuit for the counter 51, which controls the counter 51 by controlling the vertical synchronization signal or a signal in its place.
First, instruct all initial aid value settings. The counter 51 starts counting in response to the video signal.

If there is a possibility that the bit signal may appear as a DC signal, the driving signal (DRVl) should include a 7 ring clock.
The total display amount (for the screen) is counted and outputted as the total display amount data. The lightness determining circuit 53 outputs a control signal (LD)' (via the r line 506) for controlling the entire brightness on the CRT display tube surface according to the display amount data.

In the case of C, the operation of the lightness determining circuit 53 is to generate a control signal sound that makes the display darker when the amount of display is large, and brighter when the amount of display is small. The lightness determination circuit 53 may also include a digital bone analog conversion circuit in which the data supplied through the line 501r is a digital quantity. In this case, the control signal output via line 506 can be varied analogously. If it is determined that there is little visible difference, line 5
06'! Accordingly, the control signal outputted through f'' may also be limited to a small step change of one degree.The signal LC, which is the output of the lightness control circuit 54, is connected to the line 506.
The level of the video signal is fully controlled in accordance with the brightness control signal input via the line 5os2, and is output as a video signal via the line 5os2.

The above is an explanation of the display amount detection circuit 50, which is the core of the present invention.

By controlling as described above, as shown in FIG. 11 (a timing chart showing the operation timing of the video signal and the vertical auxiliary signal for one frame period), the video signal V to VD becomes 1. Even if the display amount for the screen is different, the signal finally supplied to the display device will be as shown on the right, and the brightness for 1 dl + screen will be as shown in Figure 12 (as shown in Figure 11, the diπ signal V ~ VD The brightness when viewed on the screen of a CRT display tube is averaged over the entire time on the TV and becomes constant as shown in the figure for fc.

6 to 8 show the positioning of the display amount detection control circuit Σ1 shown in FIG. 5 within the display control system. In the present invention, this display amount detection control circuit 50? The content of the control changes depending on where it is placed in the display control box. 10 in the figure is the basic circuit for display including display buffer memory? show.

According to the embodiment shown in FIG. 6, the display amount detection control circuit 50 is arranged after the basic circuit 10.

Therefore, desired data for at least one page of 1iffi is displayed on the taste device without any brightness control.

According to the actual 7M example in FIG.
/CNT) is also supplied to the display amount detection control circuit at the same time. According to this example, since the data t and display amount detection control circuit A are detected at the same time, the basic display control circuit OVC is completed and the next time the brightness is fully controlled by the signal (LC)? It is possible to prepare. Therefore, when the video signal is output, a control signal with a fine control signal for brightness is already generated and does not change even momentarily, so that a better result than the embodiment shown in FIG. 6 can be obtained. 2. According to the embodiment of FIG. 8, the display amount detection circuit J can be simplified by having the nine circuits shown in FIG. In the embodiment shown in FIG. 8, the value calculated on the program from the control circuit (comprised of the CPU) that performs the filling in the buffer memory (calculation of display amount Chittan t line lO:
It is ltB' that the a input is applied to the l'f valve. According to this, the display j detection control circuit 50 only needs to generate one elaborate word for controlling the brightness, and therefore the circuit is simplified compared to the one shown in FIG. In this case as well, if synchronization with writing is performed as in the embodiment shown in FIG. 7, brightness control can be realized immediately after the display data changes.

FIGS. 9 and 10 are illustrated to explain in which part of the entire display control device t the control signal obtained as described above is made effective.

FIG. 9 shows an example of controlling the video signal level Kk supplied to a display device, which is effective in a system where the display device changes brightness depending on the level of the video signal.

In this case, the video signal (VIDEOIN)' is set to level ti according to the brightness control signal (LC),
The present invention is realized by outputting as vrngo OUT.

Figure 10 shows an example of controlling the inside of the display device. This is what makes the xylophone Koushi come true.

Above, I mainly talked about CRT display monitors, but
It can also be applied to all other disc ray devices.

In addition, it can be applied to analog display screens such as ordinary televisions (TVs), and the present invention can be immediately put into practice when applied to TV receivers, which should reduce eye fatigue and bring business benefits. It is. Furthermore, using the present invention, dual brightness? When applied to a nice play device that has conventional technology, when a large portion of the Shin 28 brightness is displayed, the overall brightness increases, and this i
Improved the brightness of the Fudori brightness part? ! -Since it can be made constant regardless of the display amount, it becomes possible to clearly distinguish between seven points.

Is the part of the invention that always has constant brightness constant? If the system is further developed and adjusted to the external environment (room brightness, etc.) and kept constant at the t level, eye fatigue will be further reduced.

〔Effect of the invention〕

As explained above, according to the present invention, when the display amount constantly changes, the brightness of the entire DISRAY device changes? By keeping it constant, eye fatigue is reduced compared to conventional methods. or,
By promoting the above-mentioned matters as business features,
Design from an ergonomic standpoint, which has recently begun to attract attention overseas? The fist you're doing? , it is advantageous because it can be emphasized.

Furthermore, as an effect of xylophone F3) 3, the nice play device disappears! 7. Is the display system operationally stable because the power is approximately constant? Can be provided.

[Brief explanation of drawings]

Figures 1 and 2 show the configuration of a conventional CRT display monitor and a CRT control unit. Ming? The timing chart shown in Fig. 4 shows the video signal shown in Fig. 3 when the brightness is averaged over the time t when viewed on the CRT display screen (Fig. 5). 6, 7, and 8 are block diagrams illustrating the display detection control circuit in which the invention is adopted, and a display control device of the display amount detection control circuit shown in FIG. 5. The various embodiments shown in Figures 9 and 10 are for the purpose of clarifying in which part of the control system the control signal generated by the invention is effective. FIG. 11 is a timing chart illustrating the operation timing of the video signal and vertical synchronization signal during one frame period when the present invention is realized, and FIG. The video signal VA'-VD2Ci shown by (the brightness when viewed on the T display tube fc and when averaged over time t TV) is shown in the figure. 10...Basic display control circuit, 50...・Display amount detection control circuit, 51...Counter, 52...Counter system @1
Circuit, 53...Lightness Kekkyoukaiyu, 54...Lightness control circuit. Applicant's agent Patent attorney Takeshi Suzue Chinka 3ml Article 4- VA VB VC゛1511 119 Figure 11 Garden 11211 Va Vs Vc
V.

Claims (1)

[Claims] A counting means for counting the display of one frame period; a circuit for generating a signal tone for controlling the brightness of the display device according to the value obtained by the counting means; When the brightness of the display device is fully controlled by the signal output from the control circuit, the brightness of the display device is always constant regardless of the display amount indicated by the upper dpi counting means. , or a display control method characterized by controlling brightness according to a certain constant.