Electroluminescent display panel and electronic apparatus
An electroluminescent display panel has pixel circuits for the active matrix driving system. Each pixel circuit has a thin-film transistor in which a portion of a pattern of a metal wiring material above the channel layer of the thin-film transistor is so laid out as to shield the channel region of the thin-film transistor.
1. An electroluminescent display panel having pixel circuits for an active matrix driving system, wherein at least one of the pixel circuits has a thin-film transistor in which a portion of a pattern of a metal wiring material above a channel layer of the thin-film transistor is positioned to shield a channel region of the thin-film transistor,
the portion of the pattern of the metal wiring material being connected to receive a pulse signal through a variable source line that is electrically separate from a signal line and a gate of the thin-film transistor, the gate of the thin-film transistor being connected to a write control line configured for connection to a write control scanner,
wherein a potential generated by the variable source line is set to change over time according to a variation of a threshold voltage of the thin-film transistor, and
wherein the write control scanner is configured to adjust a duration of a transistor-characteristic correction of the pixel circuit according to a brightness level of the pixel circuit.
2. The electroluminescent display panel as defined in claim 1 , wherein the portion of the pattern of the metal wiring material is connected to a control line of a gate electrode of the thin-film transistor.
3. The electroluminescent display panel as defined in claim 1 , the portion of the pattern of the metal wiring material is formed from the same metal wiring material as main electrodes of the thin-film transistor.
4. The electroluminescent display panel according to claim 3 , wherein the pattern of the metal wiring material is formed at the same time as the main electrodes of the thin-film transistor.
5. The electroluminescent display panel having pixel circuits for an active matrix driving system according to claim 1 , wherein the thin-film transistor is a sampling transistor.
6. An electronic device comprising the electroluminescent display panel according to claim 1 .
7. The electronic device according to claim 6 , wherein the electronic device is a mobile phone.
8. The electronic device according to claim 6 , wherein the electronic device is a camera.
9. The electronic device according to claim 6 , wherein the electronic device is a portable computer.
10. The electroluminescent display panel according to claim 1 , wherein the transistor-characteristic correction is a mobility correction.
11. An electroluminescent display panel having pixel circuits for an active matrix driving system, wherein at least one of the pixel circuits has a thin-film transistor in which a light shield pattern is positioned above a channel layer of the thin-film transistor,
the light shield pattern being connected to receive a pulse signal through a variable source line that is electrically separate from a signal line and a gate of the thin-film transistor, the gate of the thin-film transistor being connected to a write control line configured for connection to a write control scanner,
wherein a potential generated by the variable source line is set to change over time according to a variation of a threshold voltage of the thin-film transistor, and
wherein the write control scanner is configured to adjust a duration of a transistor-characteristic correction of the pixel circuit according to a brightness level of the pixel circuit.
12. The electroluminescent display panel as defined in claim 11 , wherein the light shield pattern is formed from a semiconducting material doped with metal atoms.
13. The electroluminescent display panel as defined in claim 11 , wherein the light shield pattern is formed from an organic material.
14. The electroluminescent display panel as defined in claim 13 , wherein the organic material includes black filters.
15. The electroluminescent display panel according to claim 11 , wherein the light shield pattern is formed at the same time as main electrodes of the thin-film transistor.
16. The electroluminescent display panel according to claim 11 , wherein the transistor-characteristic correction is a mobility correction.
17. An electronic apparatus comprising:
an electroluminescent display panel;
a system control section to control the operation of an entire system; and
an operation input section to accept input operation for the system control section,
the electroluminescent display panel having pixel circuits for an active matrix driving system, wherein at least one of the pixel circuits has a thin-film transistor in which a portion of a pattern of a metal wiring material above a channel layer of the thin-film transistor is so laid out as to shield a channel region of the thin-film transistor,
the portion of the pattern of the metal wiring material being connected to receive a pulse signal through a variable source line that is electrically separate from a signal line and a gate of the thin-film transistor, the gate of the thin-film transistor being connected to a write control line, which is connected to a write control scanner,
wherein a potential generated by the variable source line is set to change over time according to a variation of a threshold voltage of the thin-film transistor, and
wherein the write control scanner is configured to adjust a duration of a transistor-characteristic correction of the pixel circuit according to a brightness level of the pixel circuit.
18. The electronic apparatus according to claim 17 , wherein the thin-film transistor is a sampling transistor.
19. The electronic apparatus according to claim 17 , wherein the transistor-characteristic correction is a mobility correction.
20. An electronic apparatus comprising:
an electroluminescent display panel;
a system control section to control the operation of an entire system; and
an operation input section to accept input operation for the system control section,
the electroluminescent display panel having pixel circuits for an active matrix driving system, wherein at least one of the pixel circuits has a thin-film transistor in which a light shield pattern is laid out above a channel layer of the thin-film transistor,
the light shield pattern being connected to receive a pulse signal through a variable source line that is electrically separate from a signal line and a gate of the thin-film transistor, the gate of the thin-film transistor being connected to a write control line, which is connected to a write control scanner,
wherein a potential generated by the variable source line is set to change over time according to a variation of a threshold voltage of the thin-film transistor, and
wherein the write control scanner is configured to adjust a duration of a transistor-characteristic correction of the pixel circuit according to a brightness level of the pixel circuit.
21. The electronic apparatus according to claim 20 , wherein the thin-film transistor is a sampling transistor.
22. The electronic apparatus according to claim 20 , wherein the transistor-characteristic correction is a mobility correction.