Electrooptical device, electronic equipment, and driving method for electrooptical device
A technology of electro-optical devices and electro-optical components, which can be applied to instruments, static indicators, etc., and can solve problems such as deterioration of display area clarity, narrowing of connection distances, difficulty in connecting pixel matrix substrates, etc.
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no. 1 approach
[0062] An embodiment of the present invention is an electro-optical device including a drive circuit using an EL element as an electro-optical element. exist figure 1 In , an overall block diagram of an electronic device including such an electro-optical device is shown.
[0063] Such as figure 1 As shown, this electronic device has the function of displaying a predetermined image by a computer, and at least includes a display circuit 1 , a drive controller 2 and a computer device 3 .
[0064] The computer device 3 is a general-purpose or special-purpose computer device, and outputs data (gradation display data) representing grayscales expressed as intermediate values for each pixel (dot) to the drive controller 2 . In the case of a color image, halftones of dots displaying each primary color are designated by grayscale display data, and the synthesis of halftones of dots of each designated primary color is expressed as a specific color pixel.
[0065] The drive control...
no. 2 approach
[0088] The second embodiment of the present invention is a further development of the electronic device and electronic equipment shown in the above-mentioned first embodiment.
[0089] Figure 5 The structure of the specific electronic device of the second embodiment is shown in Figure 8 Represents a timing diagram illustrating its operation. Figure 5 One color pixel PmnC that performs color display, a current latch circuit Lm that supplies current to the color pixel, a D / A converter CIm, and a current amplifier circuit Bm are shown. Blocks (indicated by dotted lines) of each pixel circuit, current amplifier circuit, and constant current output circuit (D / A converter) CI m are the same as those in the first embodiment, and thus will be briefly described. in addition, Figure 7 A circuit diagram of the current latch circuit Lm is shown in .
[0090] This embodiment differs from the first embodiment in the following points. First, a current latch circuit Lm is newly provi...
no. 3 approach
[0104] The third embodiment of the present invention is a further development on the basis of the second embodiment in order to expand the gray scale (brightness) adjustment range to achieve the object of the present invention. In particular, in the third embodiment, focusing on the fact that the organic EL element can perform high-speed switching on the order of μsec, it is characterized in that the light emission control line Vgn of the pixel circuit shown in the first and second embodiments is pulsed Drive organic EL elements.
[0105] Figure 9 A block diagram showing a driving circuit of the third embodiment, Figure 10 An explanatory diagram showing the principle of the third embodiment, Figure 11 A timing chart of the drive circuit of the third embodiment is shown. exist Figure 9 , 11 Among them, the parts different from the second embodiment are the control method of the light emission control lines Vgn and Vg(n-1) of the pixel circuit and the connection with th...
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