1. A method of controlling an optical deflector adapted to deflect light from a light source so as to make deflected beams of light scan, said method comprising:
a position detecting step of detecting a position of a deflected beam of light moving on a light receiving element in one direction and a position of another deflected beam of light moving on the light receiving element in the opposite direction;
a sensing step of sensing a phase difference between a phase as detected in said detecting step and a predefined phase; and
a controlling step of controlling either a drive frequency being applied to said optical deflector or a modulation timing for reciprocative drawing according to an outcome of said sensing step.
2. A method according to claim 1, wherein said position detecting step is a step of detecting a modulated pixel position in a photoelectric conversion element by weighting the center coordinates of a plurality of light receiving sections on the basis of information on the detected quantity of light from each of the plurality of light receiving sections, and adding the weighted center coordinates of the light receiving sections.
3. A method according to claim 1, wherein said position detecting step is a step of determining the light receiving section having the largest quantity of light as a modulated pixel position on the basis of information on the detected quantity of light from each of the plurality of light receiving sections.
4. A method according to claim 1, wherein said position detecting step is a step of detecting a modulated pixel position by means of a plurality of photoelectric conversion elements arranged two-dimensionally and contained in the light receiving element and is also a step of detecting the positions of the deflected beams of light displaced from each other in a direction perpendicular to the scanning direction and corresponding respectively to the scanning period in the one direction and the scanning period in the opposite direction.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1.-5. (canceled)
6. A display apparatus comprising:
a substrate having wiring lines including at least signal lines arranged in columns, and scanning lines arranged in rows; and
a matrix of pixels, wherein the wiring lines are formed by a conductor film;
a light-emitting material interposed between an anode electrode and a cathode electrode; and
a first uneven zone and a second uneven zone are between the anode electrode of the pixel and the anode electrode of an adjacent pixel;
wherein
the first uneven zone is formed on the substrate due to level differences resulting from the presence of the scanning lines;
the second uneven zone is formed on the substrate also due to level differences resulting from the presence of the scanning lines; and
a pattern of the conductor film of which the wiring lines are made is formed such that part of recessed portions of the first uneven zone are located behind their corresponding raised portions of the second uneven zone, as viewed from inside the pixel.
7. The display apparatus according to claim 6, wherein the conductor film includes an upper layer and a lower layer;
the wiring lines include upper layer lines formed by patterning the upper layer and lower layer lines formed by patterning the lower layer; and
a pattern of the lower layer is formed properly such that the recessed portions of the outer uneven zone are located directly behind their corresponding raised portions of the inner uneven zone, as viewed from inside the pixel.
8. The display apparatus according to claim 6, wherein the pattern of the conductor film is electrically connected to the wiring lines and constitutes part of the wiring lines.
9. The display apparatus according to claim 6, wherein the pattern of the conductor film includes pads that are electrically isolated from the wiring lines and compensate for level differences resulting from the presence of the wiring lines.