Display apparatus and method for driving the same
A display device, capacitive load technology, used in static indicators, instruments, etc., can solve problems such as inability to improve brightness and limit the total number of sustain pulses
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no. 1 approach
[0025] FIG. 1 is a schematic diagram showing a basic configuration example of a plasma display (display device) according to a first embodiment of the present invention. Control circuit unit 101 includes display load factor detection unit 111 and sustain pulse control unit 112 , and controls address driver 102 , X sustain circuit 103 for driving X electrodes, Y sustain circuit 104 for driving Y electrodes, and scan driver 105 .
[0026] Address driver 102 supplies predetermined voltages to address electrodes A1, A2, A3, . . . The individual address electrodes A1, A2, A3... or their collective names are hereinafter collectively referred to as address electrodes Aj, where j denotes an additional word.
[0027] Under the control of the control circuit unit 101 and the Y sustain circuit 104 , the scan driver 105 supplies a predetermined voltage to the Y electrodes Y1 , Y2 , Y3 . . . . Each of the Y electrodes Y1, Y2, Y3... or their generic term is hereinafter collectively referre...
no. 2 approach
[0066] Next, a second embodiment of the present invention will be described. Unlike the sustain pulses of FIGS. 5A and 5B in the first embodiment, this embodiment generates the sustain pulses of FIGS. 6A and 6B .
[0067]FIG. 6A is a timing chart showing a sustain pulse of the Y electrode Yi when the display load factor is large. FIG. 6B is a timing chart showing a sustain pulse of the Y electrode Yi when the display load factor is small. Under the control of the sustain pulse control unit 112, the Y sustain circuit 104 in FIG. 1 generates a sustain pulse as shown in FIG. sustain pulse as shown in Figure 6B. The sustain pulses in FIGS. 6A and 6B are generated by the Y sustain circuit in FIG. 4 during the sustain period Ts in FIG. 3 .
[0068] FIG. 6A shows a sustain pulse when the load factor is high, and is the same as the sustain pulse shown in FIG. 5A. Therefore, the sustain pulse of FIG. 6A can be generated by adopting the same method as that of the sustain pulse of FI...
no. 3 approach
[0076] 7 is a graph showing the relationship between the display load factor and the total number of sustain pulses in the third embodiment of the present invention. The horizontal axis represents the display load ratio, and the vertical axis represents the total number of sustain pulses for each frame of image. The total number of sustain pulses N1 is the total number of sustain pulses per one frame image of the sustain pulses in FIG. 5A or FIG. 6A when the display load factor is large. The total number of sustain pulses N2 is the total number of sustain pulses for each frame image of the sustain pulses in FIG. 5B or FIG. 6B when the display load factor is small, and the total number of sustain pulses N2 is greater than the total number of sustain pulses N1 .
[0077] The relationship between the display load rate and the total number of sustain pulses has a hysteresis characteristic, that is, the first threshold D2 when the display load rate increases is different from the f...
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