基于MOTFT的行集成驅(qū)動電路的研究
發(fā)布時間：2018-12-26 18:52
【摘要】：金屬氧化物薄膜晶體管(MOTFT)具有遷移率高、制備工藝簡單,可以生長在柔性襯底上等優(yōu)點(diǎn),是具有重大發(fā)展?jié)摿Φ南乱淮鶷FT技術(shù),采用MOTFT設(shè)計顯示驅(qū)動電路,以滿足大尺寸、高分辨率、柔性透明的顯示需求,并降低顯示屏成本和實(shí)現(xiàn)顯示設(shè)備的窄邊框設(shè)計,近年來已成為國內(nèi)外的研究熱點(diǎn)之一。為適應(yīng)顯示屏低功耗和高分辨率的發(fā)展趨勢,從降低功耗和提高輸出速度兩個方面對基于MOTFT的行集成驅(qū)動電路進(jìn)行研究。在低功耗型的行集成驅(qū)動電路的研究中,分析了現(xiàn)有交流和直流驅(qū)動輸出級在功耗和速度上的優(yōu)缺點(diǎn),設(shè)計了交直流驅(qū)動輸出級,大幅降低交流驅(qū)動輸出級的動態(tài)功耗,并縮短了直流驅(qū)動輸出級的上升時間。在此基礎(chǔ)上,設(shè)計了一種采用交直流驅(qū)動輸出級的行集成驅(qū)動電路,并采用BCE工藝在玻璃襯底上制作了46級電路進(jìn)行測試,實(shí)驗(yàn)結(jié)果顯示,與采用交流驅(qū)動輸出級的行集成驅(qū)動電路相比,采用交直流驅(qū)動輸出級的行集成驅(qū)動電路節(jié)省約57%的功耗。另一方面,分析了現(xiàn)有行集成驅(qū)動電路中二極管接法反相器和時鐘控制反相器存在的問題,設(shè)計了反饋型反相器,大幅減少了二極管接法反相器的靜態(tài)功耗,避免了時鐘控制反相器的動態(tài)功耗。在此基礎(chǔ)上,設(shè)計了一種采用反饋型反相器的行集成驅(qū)動電路,使單級電路中僅有一個小尺寸的晶體管與時鐘信號相連接以降低動態(tài)功耗,48級采用BCE工藝集成在柔性襯底上的電路實(shí)驗(yàn)結(jié)果顯示,單級該行集成驅(qū)動電路的功耗為18.3μW,與現(xiàn)有采用單時鐘控制的行集成驅(qū)動電路相比,節(jié)省了約44.8%的功耗,有效降低了電路功耗。在高輸出速度的行集成驅(qū)動電路的研究中,分析了現(xiàn)有行集成驅(qū)動電路的輸入級和輸出級在速度上存在的問題,并對現(xiàn)有的輸入級和輸出級進(jìn)行優(yōu)化設(shè)計,以提高輸出晶體管的柵極電壓,增大輸出電流,提高電路的輸出速度。在此基礎(chǔ)上,設(shè)計了一種采用優(yōu)化后的輸入級與輸出級的雙邊行集成驅(qū)動電路,仿真結(jié)果顯示,相同條件下與現(xiàn)有采用交流驅(qū)動輸出級的行集成驅(qū)動電路相比,該電路上拉時輸出晶體管柵極電壓提高了約40.1%,下拉時輸出晶體管柵極電壓提高了約144.4%,輸出上升與下降時間均減少約44.4%,有效提高了輸出速度。
[Abstract]:Metal oxide thin film transistor (MOTFT) has the advantages of high mobility, simple preparation process, and can be grown on flexible substrates. It is the next generation TFT technology with great development potential. The display drive circuit is designed by using MOTFT to satisfy the large size. In recent years, high resolution, flexible and transparent display demand, reducing the cost of display screen and realizing the narrow border design of display equipment have become one of the research hotspots at home and abroad. In order to adapt to the development trend of low power consumption and high resolution of display screen, the row integrated drive circuit based on MOTFT is studied from two aspects of reducing power consumption and increasing output speed. In the research of the low power type row integrated drive circuit, the advantages and disadvantages of the current AC and DC drive output stages in power consumption and speed are analyzed, and the AC / DC drive output stage is designed, which greatly reduces the dynamic power consumption of the AC drive output stage. The rise time of DC drive output stage is shortened. On this basis, a row integrated drive circuit with AC / DC drive output level is designed, and 46 stage circuits are fabricated on glass substrate by BCE process. Compared with the row integrated drive circuit with AC drive output stage, the line integrated drive circuit using AC / DC drive output stage saves about 57% power consumption. On the other hand, the problems of diode connection inverter and clock controlled inverter are analyzed, and the feedback inverter is designed, which greatly reduces the static power consumption of diode junction inverter. The dynamic power consumption of the clock controlled inverter is avoided. On this basis, a row integrated drive circuit with feedback inverter is designed, in which there is only one small transistor connected to the clock signal to reduce the dynamic power consumption. The experimental results of 48 stage integrated circuit on flexible substrate using BCE process show that the power consumption of single-stage integrated drive circuit is 18.3 渭 W, which is about 44.8% less than that of the current row integrated drive circuit controlled by single clock. The circuit power consumption is reduced effectively. In the research of row integrated drive circuit with high output speed, this paper analyzes the speed problems of the input and output stages of the current line integrated drive circuit, and optimizes the design of the existing input and output stages. In order to improve the gate voltage of the output transistor, increase the output current, improve the output speed of the circuit. On this basis, a two-sided row integrated drive circuit with optimized input and output levels is designed. The simulation results show that, under the same conditions, compared with the existing row integrated drive circuit with AC drive output level, The gate voltage of the output transistor increases about 40.1 when the circuit is pulled up, the gate voltage of the output transistor increases about 144.4 when the output is pulled down, the time of output rise and fall is reduced by about 44.4, and the output speed is improved effectively.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN873;TN321.5
本文編號：2392541
[Abstract]:Metal oxide thin film transistor (MOTFT) has the advantages of high mobility, simple preparation process, and can be grown on flexible substrates. It is the next generation TFT technology with great development potential. The display drive circuit is designed by using MOTFT to satisfy the large size. In recent years, high resolution, flexible and transparent display demand, reducing the cost of display screen and realizing the narrow border design of display equipment have become one of the research hotspots at home and abroad. In order to adapt to the development trend of low power consumption and high resolution of display screen, the row integrated drive circuit based on MOTFT is studied from two aspects of reducing power consumption and increasing output speed. In the research of the low power type row integrated drive circuit, the advantages and disadvantages of the current AC and DC drive output stages in power consumption and speed are analyzed, and the AC / DC drive output stage is designed, which greatly reduces the dynamic power consumption of the AC drive output stage. The rise time of DC drive output stage is shortened. On this basis, a row integrated drive circuit with AC / DC drive output level is designed, and 46 stage circuits are fabricated on glass substrate by BCE process. Compared with the row integrated drive circuit with AC drive output stage, the line integrated drive circuit using AC / DC drive output stage saves about 57% power consumption. On the other hand, the problems of diode connection inverter and clock controlled inverter are analyzed, and the feedback inverter is designed, which greatly reduces the static power consumption of diode junction inverter. The dynamic power consumption of the clock controlled inverter is avoided. On this basis, a row integrated drive circuit with feedback inverter is designed, in which there is only one small transistor connected to the clock signal to reduce the dynamic power consumption. The experimental results of 48 stage integrated circuit on flexible substrate using BCE process show that the power consumption of single-stage integrated drive circuit is 18.3 渭 W, which is about 44.8% less than that of the current row integrated drive circuit controlled by single clock. The circuit power consumption is reduced effectively. In the research of row integrated drive circuit with high output speed, this paper analyzes the speed problems of the input and output stages of the current line integrated drive circuit, and optimizes the design of the existing input and output stages. In order to improve the gate voltage of the output transistor, increase the output current, improve the output speed of the circuit. On this basis, a two-sided row integrated drive circuit with optimized input and output levels is designed. The simulation results show that, under the same conditions, compared with the existing row integrated drive circuit with AC drive output level, The gate voltage of the output transistor increases about 40.1 when the circuit is pulled up, the gate voltage of the output transistor increases about 144.4 when the output is pulled down, the time of output rise and fall is reduced by about 44.4, and the output speed is improved effectively.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN873;TN321.5
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