Image display device
An image display device and capacitor technology, applied in static indicators, nonlinear optics, instruments, etc., can solve the problems of different stable states, decreased display quality, uneven display, etc., and achieve the effect of eliminating afterimages
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Embodiment approach 1
[0116] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0117] figure 1 It is a block diagram showing the electrical configuration of the image display device of the present invention. figure 1 The image display device 1 in FIG. 1 includes a control circuit 2 , a memory 3 , a scanning line driving circuit 4 , a signal line driving circuit 5 , and a display unit 6 .
[0118] in addition, figure 2 It is a diagram showing a circuit configuration of a light-emitting pixel included in the display unit according to Embodiment 1 of the present invention and connections to peripheral circuits thereof. figure 2 The light-emitting pixel 10 in the LED includes switching transistors 11, 12 and 19, electrostatic holding capacitors 13 and 23, driving transistor 14, organic EL element 15, signal line 16, scanning lines 17 and 18, reference power supply lines 20 and 24, positive power supply lines 21. Negative power line 22. In addi...
Embodiment approach 2
[0184] In Embodiment 1, an example of the control method in the case where the signal propagation delay when the scanning line drive circuit 4 applies the on-voltage to the scanning line 17 is not taken into account has been described. On the other hand, in Embodiment 2, an example of a control method in consideration of a signal transmission delay of the scanning line 17 will be described.
[0185] First, use figure 1 and figure 2 The signal transmission delay of the scanning line 17 will be described.
[0186] The signal transmission delay of the scan line 17 is caused by the wiring resistance of the scan line 17 itself and other control lines and power lines such as the signal line 16, the scan line 18, the reference power line 20, the positive power line 21 or the negative power line 22, etc. The resulting capacitance is specified. That is, when the output of the scanning line driving circuit 4 applied to the scanning line 17 is switched from the on voltage to the off...
Embodiment approach 3
[0201] In Embodiment 1 and Embodiment 2, an example of the control method of the image display device was described. In Embodiment 3, on the basis of Embodiments 1 and 2, afterimages caused by hysteresis characteristics of drive transistors are eliminated by appropriately performing wiring layout of the image display device, which will be described below.
[0202] Hereinafter, problems in the case where the wiring layout is not properly performed will first be described, and then the wiring layout of the image display device in this embodiment will be described.
[0203] For example, it is an important function for the switching transistor 12 to stably hold the gate voltage ( VREF1 ) of the driving transistor 14 together with the electrostatic holding capacitor 13 without leaking during the reset period. Here, the reset period is after the voltage level of the scanning line 17 changes from a high level (on voltage) to a low level (off voltage) as described above (for example, ...
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