JPS592081A - Pdp driving circuit - 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 (11) Technical Field of the Invention The present invention relates to a driving circuit for a complex plasma display panel (hereinafter abbreviated as IPDP).

(2) Technical background In recent PDPs, there are many display contents, for example, 7
The combination of segment displays, dot matrix displays, and Union Jack displays is progressing. mosquito\
In a combined FDP display, the drive circuits are driven by separate and independent drive circuits for different reasons for the display. In such a PDP, completely unrelated and independent circuits coexist, and if one is working but the other is not, it will not work, and the blanking operations of each circuit will be performed unrelated. There are many cases. Therefore, since power is supplied even in the non-operating state, the power consumption is wasted, which is not desirable from the viewpoint of power saving.

(3) Purpose of the invention In view of the above-mentioned drawbacks of the conventional art, it is an object of the present invention to provide an FDP drive circuit which centrally controls each of the combined displays and saves power. It is.

(4) Structure of the invention According to the invention, this purpose is segment display and dotma)
In a composite display plasma display panel (FDP) that has a plurality of displays such as an IJx display and each of the plurality of displays is driven by a separate drive circuit, a switch circuit is provided in the power supply section of each drive circuit, This is achieved by providing an FDP driving circuit characterized in that the plurality of displays in a non-display state or a blanking state are formed so that the switch circuit shuts off the front distribution power supply section.

(5) Examples of the invention Embodiments according to the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of a PDP drive circuit according to the present invention, and in the same figure, la.

1b is a drive circuit for driving the PDP with the following display, and the feature of the present invention is that each drive circuit 1
A switch circuit 2a is installed in the power supply section of a and lb.

2b is provided, and this switch circuit controls the power supply on and off to cut off the power supply section of the area that is not displayed.
This is to centrally control the valley display of P.

FIG. 2 is a detailed block diagram of the switch circuit in FIG. 1. In FIG. 2, 3 is a signal detection circuit, 4 is a timer circuit, 5 is a switch circuit, ■ζ1°R, , R is a resistor, DI and D are diodes, and T.

T, , T, and t represent transistors, respectively.

In FIG. 2, a control signal is applied to the 'C signal detection circuit 3. This control signal is a signal input when data to be displayed is input, and when the signal detection circuit 3 detects this control signal, it turns off the switch circuit 5. Further, when this control signal is not detected, the timer 4 operates, and when a certain time control signal is not detected, the switch circuit 5 is kept in the on state. When the output of the switch circuit 5 is turned on, the transistor T is turned on, and current flows through the resistor 3, turning off the transistor T, so that P jJ P
No power is supplied to the Aj'
T.

is turned on and power is supplied to the drive circuit. Furthermore, the second
In the figure, the power input can be either AC or DC, but in the case of AC, positive voltage can be turned on and off.

Note that the circuit in FIG. 2 shows only one embodiment.
Of course, such a switch circuit can be constructed from various other circuits. In the above description, the case where there are two types of display has been explained, but the present invention is not limited to this, and it goes without saying that it can be applied to the case where there are three or more types of display.

(6) Effects of the Invention As explained in detail above, according to the present invention, a large number of composite displays are centrally controlled by a switch circuit provided in the power supply unit, and power is cut off to areas that are not displayed, thereby saving power. Since the present invention can be applied to a composite display PDP, the effect is extremely large.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of a PDP driving circuit according to the present invention, and FIG. 2 is a detailed block diagram of the power switch circuit in FIG. 1. In the drawings, 2a and 2b each indicate a power switch circuit. Patent applicant Fujitsu Limited Patent agent Akira Aoki Patent attorney Kazuyuki Nishidate Patent attorney Yukio Uchida Akira Yamaguchi

Claims (1)

[Claims] 1. A composite display plasma display panel (4) having four plurality of displays such as a segment display and a dot matrix display, each of which is driven by a separate drive circuit.
FDP), a power supply switch circuit is provided in the power supply section of each of the drive circuits, and the display in a non-display state or a blanking state during the plurality of displays is configured to be turned off by the switch circuit and the front distribution power supply section is cut off. A PDP drive circuit characterized by the following. 2. A signal detection circuit for the power switch circuit to detect the data input signal of the display; a timer circuit that operates when the signal detection circuit does not detect the input signal; and a timer circuit for the signal detection circuit to detect the data input signal. 2. The switch circuit according to claim 1, further comprising a switch circuit that turns on the power of the drive circuit when the timer circuit is detected and turns off the power of the drive circuit when the timer circuit is operating. PDP drive circuit.