| Electroluminescence Gray Scale Display Driving Method and Circuit |
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| 作者姓名： | KANG Hao LI Rong-yu YANG Xin |
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| 作者单位： | [1]Department of Electronic and Engineering; [2]Institute of Image Processing and Pattern Recognition, Shanghai Jiao Tong University, Shanghai 200240, CHN |
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| 摘 要： | The increasing use of color terminals for personal computers has raised a demand for video graphic adapter（VGA）-format panel displays. Since only monochrome（ZnS ： Mn） electroluminescence（EL） displays of suitable size and speed are available, lack of colors has to be replaced by grayscale in the first place. There are two basic driving methods to achieve grayscale in thin-film EL displays： pulse amplitude modulation（PAM） method and pulse width modulation（PWM） method. But there are serious disadvantages of the two traditional methods. For the former method, the high voltage PAM ICs are too expensive to produce the grayscale EL display in bulks and the driver integrated circuit（IC） is complex. Though the PWM method has good grayscale display quality, the hardware implementation is too complex. A new driving method with which the width and the amplitude of the pulse can be modulated and simultaneously the challenge can be solved efficaciously is presented.
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| 关 键 词： | 电致发光 显示技术 电路 传输方法 |
| 文章编号： | 1007-0206（2007）03-0225-05 |
| 收稿时间： | 2007/4/23 |
| 修稿时间： | 2007-04-232007-06-02 |
Electroluminescence Gray Scale Display Driving Method and Circuit |
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| KANG Hao LI Rong-yu YANG Xin.Electroluminescence Gray Scale Display Driving Method and Circuit[J].Semiconductor Photonics and Technology,2007,13(3):225-229. |
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| Authors: | KANG Hao LI Rong-yu YANG Xin |
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| Abstract: | The increasing use of color terminals for personal computers has raised a demand for video graphic adapter(VGA)-format panel displays. Since only monochrome(ZnS∶Mn) electroluminescence(EL) displays of suitable size and speed are available, lack of colors has to be replaced by grayscale in the first place. There are two basic driving methods to achieve grayscale in thin-film EL displays: pulse amplitude modulation(PAM) method and pulse width modulation(PWM) method. But there are serious disadvantages of the two traditional methods. For the former method, the high voltage PAM ICs are too expensive to produce the grayscale EL display in bulks and the driver integrated circuit(IC) is complex. Though the PWM method has good grayscale display quality, the hardware implementation is too complex. A new driving method with which the width and the amplitude of the pulse can be modulated and simultaneously the challenge can be solved efficaciously is presented. |
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| Keywords: | electroluminescence(EL) display gray scale representation PAM&PWM method PWM generator circuit |
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