Patent
Display device and control method thereof
| العنوان: | Display device and control method thereof |
|---|---|
| Document Number: | 20070164937 |
| تاريخ النشر: | July 19, 2007 |
| Appl. No: | 11/483748 |
| Application Filed: | July 07, 2006 |
| مستخلص: | A display device with improved brightness and a method of controlling the display device are presented. The display device includes a driving transistor, a pixel electrode electrically connected to the driving transistor, a detecting transistor detecting a magnitude of an electric signal transferred from the driving transistor to the pixel electrode, and a controller. The controller regulates a data voltage applied to the pixel electrode based on a difference between the detected electric signal and a predetermined reference level. The display device achieves improved homogeneity of brightness by compensating for any deterioration of TFTs. |
| Inventors: | Jung, Kwang-chui (Gyeonggi-do, KR); Goh, Joan-chul (Seoul, KR); Yun, Young-soo (Gyeonggi-do, KR); Choi, Beohm-rock (Seoul, KR) |
| Claim: | 1. A display device comprising: a driving transistor; a pixel electrode electrically connected to the driving transistor; a detecting transistor detecting a magnitude of an electric signal transferred from the driving transistor to the pixel electrode; and a controller regulating a data voltage applied to the pixel electrode based on a difference between the detected electric signal and a predetermined reference level. |
| Claim: | 2. The display device according to claim 1, further comprising: a driving voltage line applying the driving voltage to the driving transistor; a switching transistor connected to a gate electrode of the driving transistor; a data line applying the data voltage to the switching transistor; and a gate line applying a gate on voltage to the switching transistor. |
| Claim: | 3. The display device according to claim 1, further comprising a detecting line connected to the detecting transistor. |
| Claim: | 4. The display device according to claim 3, wherein the detecting line extends substantially parallel to one of the driving voltage line and the data line. |
| Claim: | 5. The display device according to claim 2, wherein the gate line is a first gate line and a gate electrode of the detecting transistor is connected to a second gate line. |
| Claim: | 6. The display device according to claim 2, wherein the controller comprises a memory storing a table of reference levels that correspond to a range of voltages including the data voltage, and wherein the controller determines a compensation voltage based on a difference between the data voltage that corresponds to a magnitude of the detected electrical signal and a voltage corresponding to the reference level. |
| Claim: | 7. The display device according to claim 6, wherein the controller applies the compensation voltage to the data line. |
| Claim: | 8. The display device according to claim 6, wherein the controller determines the compensation voltage if the difference is outside a predetermined range of values. |
| Claim: | 9. The display device according to claim 1, wherein the electric signal is a measurement of either a voltage or a current. |
| Claim: | 10. The display device according to claim 1, wherein the predetermined range comprises an error range in which the detected electric signal is substantially same as the predetermined reference level. |
| Claim: | 11. A display device comprising: a pixel electrode; a detecting transistor detecting a pixel current applied to the pixel electrode; and a controller regulating a pixel voltage applied to the pixel electrode based on a difference between the pixel current and a predetermined reference level. |
| Claim: | 12. The display device according to claim 11, wherein the controller comprises a memory storing a table of reference levels including a reference level that corresponds to the pixel current, and wherein the controller determines a compensation voltage based on a difference between the pixel voltage that corresponds to a magnitude of the detected pixel current and a voltage corresponding the reference level. |
| Claim: | 13. The display device according to claim 12, wherein the controller applies the compensation voltage to the pixel electrode. |
| Claim: | 14. The display device according to claim 11, wherein the predetermined range comprises an error range in which the detected electric signal is substantially same as the predetermined reference level. |
| Claim: | 15. A method of controlling a display device, the method comprising: turning on a driving transistor; detecting an electric signal transmitted from the driving transistor to a pixel electrode; comparing the detected electric signal with a predetermined reference level; and regulating a data voltage applied to the pixel electrode based on a difference between the electric signal and the predetermined reference level. |
| Claim: | 16. The method according to claim 15, wherein regulating the data voltage comprises determining a compensation voltage corresponding to a difference between the data voltage that corresponds to a magnitude of the detected electric signal and a voltage that corresponds to the reference level. |
| Claim: | 17. The method according to claim 16, further comprising applying the compensation voltage to the pixel electrode. |
| Claim: | 18. The method according to claim 15, wherein the electric signal is a measurement of either a voltage or a current. |
| Current U.S. Class: | 345076/000 |
| Current International Class: | 09 |
| رقم الانضمام: | edspap.20070164937 |
| قاعدة البيانات: | USPTO Patent Applications |
كن أول من يترك تعليقا!