Method for efficiently charging for organic light-emitting diode matrix capacitance
A technology for charging light-emitting diodes and capacitors, which is applied in the direction of electroluminescent light sources, light sources, electric light sources, etc., can solve the problems of increasing the cost of the mask, difficult to estimate errors, and wrong output signals
Active Publication Date: 2008-11-12
AU OPTRONICS CORP
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Depend on Figure 4 It can be seen that when the effective scanning period of a triple column unit 51T ends, the effective scanning period of another adjacent triple column unit 51T will be performed immediately, but when a triple column unit 51T ends its effective scanning period, it includes The capacitors of each capacitor may not have been charged to the data voltage they intend to represent, thus causing errors in the output signal
When the errors of such output signals are accumulated in different triple column units 51T, the resulting errors will be difficult to estimate
In addition, due to image 3 The circuit is applied to the thin-film transistor liquid crystal display, so when forming different groups of column data lines, it is necessary to use different layers of photomasks, so as not to reduce the aperture ratio of the liquid crystal display, but this method also increases the cost of the photomask used
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[0033] see Figure 5 and Figure 6 . Figure 5 It is a schematic diagram of the OLED row unit 200 and the data integrated circuit 223 included in the OLED matrix for implementing the method of the present invention. Figure 6 For implementing the method of the present invention in Figure 5 The waveform diagram of the OLED row unit 200 is shown. Such as Figure 5 As shown, the OLED row unit 200 includes a plurality of OLED units 201, a drain voltage source 203, a source voltage source 205, a reference voltage source 207, a first column data line 217, a second column data line 221, and A set of row scan lines 219 . The organic light emitting diode unit 201 includes an N-type metal oxide semiconductor 209; a capacitor 211, whose first end is coupled to the source of the N-type metal oxide semiconductor 209; a P-type metal oxide semiconductor 213, whose gate is coupled to the N-type the source of the metal oxide semiconductor 209; the diode 215, the first end of which is co...
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The invention includes precharging the row datawire which is connected onto the organic light-emitting diode unit for a time, then charging the said organic light-emitting diode unit with the said row datawire to make sure that the capacity of the said organic light-emitting diode unit can be charged to an anticipated data voltage and can,t have the condition that the said organic light-emitting diode unit can,t positively reflect the data voltage variation.
Description
technical field [0001] The invention relates to a method for charging a capacitor, in particular to a method for efficiently charging the capacitor of an organic light emitting diode matrix. Background technique [0002] In a general display panel, when the driving integrated circuit needs to write data voltages to each pixel included in the display panel, the column data lines extending from the driving integrated circuit to each pixel can be directly regarded as capacitors. In the process of each pixel receiving the data voltage from the driving integrated circuit, it is necessary to charge and discharge the column data lines, which are regarded as capacitors, so that each pixel included in the display panel can be controlled according to the driving integrated circuit. The issued data voltage works correctly. [0003] see figure 1 and figure 2 . figure 1 It is a schematic diagram of the row pixel unit 100 and the data integrated circuit 123 in the circuit included in...
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IPC IPC(8): G09G3/32G09G3/30G09G3/20H05B33/08H05B33/14G09G3/3208H05B44/00
Inventor 唐宇骏
Owner AU OPTRONICS CORP