TW201211972A - Control board for amorphous silicon gate - Google Patents

Abstract

A control board and a control method for an amorphous silicon gate are disclosed. The amorphous silicon gate outputs gate driving signals and the control board comprises a DC/DC converter, an adaptive power circuit, and a level shifter. The DC/DC converter outputs a DC voltage. The adaptive power circuit comprises a temperature-sensibility component, and a voltage modulation circuit. The temperature-sensibility component senses a temperature. The voltage modulation circuit couples to the temperature-sensibility component, and modulates the DC voltage to output a operating voltage according to temperature. The level shifter outputs at least one signal to the amorphous silicon gate so that logical level of gate driving signals relate to the operating voltage.

Description

201211972

TW6361PA VI. Description of the Invention: [Technical Field] The present invention relates to a control circuit board and a control method for a gate driver, and more particularly to an Amorphous Silicon Gate (ASG) Control circuit board and control method. [Prior Art]

With the growth of amorphous Aussie manufacturing technology, the Amorphous Silicon Gate (ASG) has been integrated into the liquid crystal panel. This gate driver is also called amorphous.矽 Gate driver. Since the amorphous gate driver is formed by an amorphous silicon thin film transistor (a-si TFT) in the liquid crystal panel, the use of the original gate driver wafer and the external zero can be reduced. The number of contacts for the component. Referring to Fig. 1 'the 1st show system is a conventional amorphous stone liquid crystal display (10): intention. The conventional amorphous lithographic liquid crystal display i G includes a liquid crystal panel manufacturing = 敕 12G, a source driving 1113G, and an amorphous glaze 140. Assuming an amorphous austenitic gate driver 124 on the liquid helium panel 110. The core circuit Ϊ 12° includes a DC converter 122 and a potential conversion i control circuit is driven to 130 and the amorphous gate driver 140 is controlled by 3 v 〇 FF = 12Q. The DC converter (2) outputs a DC voltage ν 〇Ν ^ Wang potential converter 124, 佶 is $, to the amorphous stone 极 pole drive number 140. The converter 124 outputs the signal voltage vss \, the time pulse #b CK2, the start signal STV, and the work outputted by the p-packet converter 124. The source driver 130 is configured to output corresponding pixel data to 4 . 201211972

TW6361PA 曰曰 panel. 110, and the amorphous gate driver 14 turns the gate driving signal to the liquid crystal panel 110 according to the clock signal cK, the pulse CK2, the start signal STV, and the operating voltage VSS. . Referring to Fig. 2, the second figure shows the block of the amorphous gate driver ^0. The amorphous germanium gate driver 140 includes shifting the temporary state 8 to SRn+i. The shift register 8 core to SR· is output according to the clock signal CK1 clock signal CK2, the start signal STV and the operating voltage vss output gate drive signal OUT to 〇υτΝ. At the same time, the δ month refers to the third and fourth figures. The third figure shows the circuit diagram of the Nth and the sinister registers, and the fourth figure shows the sequence diagram of the ninth diagram. The Nth stage shift register sRn includes transistors Μι to Μ*. The transistor M3 outputs a gate driving signal 〇UTN' according to the clock signal CK1/CK2, and the transistor M4 is coupled to the transistor and controlled by the gate driving signal 〇UTn+i of the first stage shifting temporary storage SRN+1 output. . The transistor is controlled by the gate driving signal 〇UTn+i ’, and the transistor M1 is consuming the transistor M2 ’. The transistor M3 is driven according to the N_th level gate driving signal 〇υτ. The transistor M1 is consumed by the transfer capacitor C1 to the transistor pair. However, since the mobility (Mobility) and the threshold voltage of the amorphous germanium film transistor change with temperature, it is liable to cause the liquid crystal display to malfunction at high or low temperatures. SUMMARY OF THE INVENTION The present invention relates to an amorphous germanium gate driver (ASG) control circuit board and control method for dynamically adjusting the high logic level or low logic bit of the gate driving signal according to temperature. Accurate, 201211972

• - TW6361PA ensures the LCD monitor is working properly. According to the present invention, a control circuit board of an amorphous austenitic closed-pole driver (Bai Chong_ = Face Gate, ASG) is proposed. The control circuit board of the 赖1·ASG) includes a DC power conversion benefit, an adaptive power supply circuit and a potential converter (the coffee maker), and the actuator is used to output a plurality of interpole drive signals. The DC m is used to provide a DC voltage. The adaptive power circuit includes temperature • an adjustment circuit. The temperature sensing element senses the temperature. Voltage = Sensing component, and dynamically adjusts the DC-Sir voltage according to the temperature. The potential converter outputs to the level correlation according to the operating voltage, and the logic bit of the idle driving signal is correlated with the operating voltage. bamboo

Siiic:=Fei 2 proposes an amorphous inter-electrode driver (Am-h_ output gate drive signal = method. Amorphous 矽 gate driver is used to sense temperature and utilization and control method includes: using temperature sensing element# Pressing to turn off the electric power and pressure regulation circuit to dynamically adjust the DC current to the amorphous rock gate drive according to the temperature to rotate at least one signal according to the operating voltage to operate the voltage. a 'make the logic level of the driver signal For the above and other aspects of the following specific description, the following is a detailed description of the following example: [Embodiment] The nighttime display of the embodiment does not work properly due to temperature changes. , the next kind of control amorphous austenite pole driver (Amorphous 201211972

TW6361PA *· ,,

Silicon Gate, ASG) control board and control method. The control circuit board of the Amorphous Silic Gate Gate (ASG) includes a DC power converter, an adaptive power supply circuit and a potential converter ter)' and a non-fourth gate driver for outputting a plurality of gate drivers Signal. A DC power converter is used to provide a DC voltage. The adaptive power supply circuit includes a temperature sensing element and a voltage adjustment circuit. The temperature sensing element senses the temperature. The voltage adjustment circuit is coupled to the temperature sensing element and dynamically turns the DC voltage by 5 weeks according to the temperature to rotate the operating voltage. The potential converter outputs at least one signal to the amorphous gate driver according to the operating voltage, so that the logic level of the gate driving signal is related to the operating voltage. The control method of the non-daily 夕 〇 闸 闸 驱动 驱动 AS AS AS AS AS AS AS AS AS AS AS AS AS AS AS AS AS 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制 控制The electric C 5 week whole circuit dynamically adjusts the DC voltage according to the temperature to output the known voltage, and outputs at least one signal according to the operating voltage to the amorphous gate driving benefit, so that the logic level of the gate driving signal is related to the operation. Voltage. Several embodiments are described in detail below. The same is true for the embodiment of the present invention. The fifth embodiment of the present invention is a schematic diagram showing the display state of the solar eclipse in accordance with the embodiment of the present invention. The amorphous germanium liquid crystal display panel includes a germanium panel 210, a control circuit board 220, a source driver 230, and an amorphous austenitic gate driver integrated on the liquid crystal panel 21 by a y b 闸 gate fabrication technique. 240. The control circuit board 220 includes a DC converter 222 (DC/DC Converter), a potential converter 224 ([(9) is output in %), and an adaptive power supply circuit 226. The source driver 23 is controlled by the control circuit board 22〇201211972

* · TW6361PA out pixel data to the liquid crystal panel 210' and the amorphous rock gate driver 240 is controlled by the control circuit board 220 to output a gate driving signal to the liquid crystal panel 210. The DC converter 222 outputs DC voltages VON and VOFF to the adaptive power supply circuit 226, and the adaptive power supply circuit 226 includes a temperature sensing element 226a and a voltage adjustment circuit 226b. The temperature sensing component 226a senses the temperature T′ and the voltage adjusting circuit 226b is coupled to the temperature sensing component 226a, and dynamically adjusts the DC voltages VON and VOFF according to the temperature T to output the singular operating voltages VON(T) and VOFF(T). ). The potential converter 224 outputs the clock signal CK1, the clock signal CK2, the start signal STv, and the operating voltage VSS to the amorphous gate drive 240' according to the operating voltages VON(T) and VOFF(T) to make the gate driving signal The high logic level and the low logic level value $ are related to the operating voltages V0N(T) and VOFF(T). Since the adaptive power supply circuit 226 dynamically adjusts the DC voltages VON and VOFF according to the temperature, the operating voltages V〇N(T) and VOFF(T) are turned to the potential converter 224 because of the high logic bit of the inter-turn driving signal. The quasi-low and low logic levels are dynamically adjusted with temperature changes to prevent the LCD from malfunctioning due to temperature variations. ..., ^ Please refer to FIG. 6 and FIG. 7 , FIG. 6 is a circuit diagram of an adaptive power supply circuit according to the first practical example, and FIG. 7 is a corresponding operating voltage corresponding to the first practical example. Schematic diagram of changes with temperature. The adaptive power supply circuit 226 shown in FIG. 5 is, for example, the adaptive power supply circuit 60 shown in FIG. 6, and the temperature sensing element 226a and the voltage circuit 226b shown in FIG. 5 are, for example, FIG. 6 shows the temperature sensing element 6〇a and the turtle hardening circuit 60b. The temperature sensing element 60a includes a negative temperature coefficient thermistor RT' and the voltage adjusting circuit 6'b includes a transistor qi, an electric ps 201211972 TW6361PA, , a R R1 and a resistor R2. The first end of the transistor Q1 receives the DC voltage VON, and the second end of the transistor Q1 outputs the operating voltage VON (T). The resistor R1 is coupled between the first end of the transistor Q1 and the control terminal of the transistor Q2. The resistor R2 is coupled between the thermistor RT and a ground, and the thermistor RT is coupled between the resistor R1 and the resistor R2. It should be noted that the current flowing through the pixel in the liquid crystal panel = 'When the temperature rises', the moving rate will rise, which will cause the current to rise. At this time, if the voltage of the amorphous germanium thin film transistor can be relatively reduced. It will be able to suppress the rise of the current. Conversely, when the temperature drops, the rate of movement will drop, which will cause the current to drop. At this time, if the voltage L of the amorphous germanium thin film transistor can be relatively increased, the fall of the current 4 can be suppressed. Operating voltage in Figure 6

VONiT) = VON x R2 + RT--Κβ/. When the temperature rises, the resistance voltage R\ + R2 + RT RT decreases, so the operating voltage VON(T) will decrease. Conversely, when the temperature drops, the operating voltage VON (T) will rise as the resistance of the thermistor RT rises. Since the rise of the operating voltage VON (T) causes the high logic level of the gate driving signal to rise, the voltage core of the amorphous germanium transistor transistor increases, thereby suppressing the current drop to ensure the normal operation of the liquid crystal display. . Please refer to Figure 11, which shows a schematic diagram of the high logic level of the gate drive signal as a function of temperature. As mentioned earlier, the high logic level of the scan drive signal changes with the operating voltage VON(T). For example, 201211972

, · TW6361PA When the temperature T! rises to the temperature of 72, the operating power rises and falls, causing the scan drive signal to follow the temperature.

Vgh drops to the scan drive signal. , the position of the ground, the person, the sound of the field τ! 4 material level Vgh2. On the contrary, when the field/span T1 drops to a temperature of 3, the operating voltage V〇N(t)2 rises with the temperature drop, causing the scan driving signal g 糸Vgh to rise to the high logic of the scan driving signal G(T3). Level: The second embodiment of the second embodiment, please refer to Figure 8 and Figure 9. Figure 8 shows the circuit diagram of the adaptive power supply circuit of the system, IX. A schematic diagram of the corresponding operating voltage as a function of temperature. The f-type adaptive power supply circuit 226 is, for example, adapted to the δ diagram, the circuit 80, and the temperature sensing element 22 shown in FIG. The adjustment circuit 226b is, for example, the temperature sensing element 8 shown in FIG. 8, such as the voltage adjustment circuit 80b. When the adaptive power supply circuit 60 is shown in Fig. 6 on the adaptive power supply circuit shown in Fig. 8, the curves of the operating voltages v〇Ni and VOFF(T) as a function of temperature are as shown in Fig. 9. The temperature sense 1 element 80a includes a thermistor RT of a negative temperature coefficient, and the voltage regulator I 80b includes a transistor Q1, a resistor R1, and a resistor R2. One end of the transistor receives the DC voltage V〇FF ' and the second end of the transistor Q1 outputs the voltage VOFF (T). The resistor R1 is connected to the control of the transistor Q1 and the thermistor RT', and the thermistor RT is coupled between the first end of the transistor Q丨 and the control terminal of the transistor. The resistor R2 is coupled between the resistor R1 and the ground.

201211972 TW6361PA 需 ' 1 = \_ c w , 疋, the current flowing through the pixel in the liquid crystal panel ’ When the temperature rises, the mobility increases with the film crystal c. At this time, if the amorphous thin can be relatively reduced, when the temperature is lowered, the second: can suppress the rise of the current. Conversely, the rate of temple movement will drop, and it will lead to 'if you can. Electricity' " IL 々 decline. The relative suppression current / of the amorphous 矽 film transistor will reduce the ϋ. In Figure 8, φ V〇FF{T)^v〇FFx RX + R2 'operating voltage ^TT^IT^+FTM is shown. When the temperature rises, the resistance of & RT decreases with the thermal breaking resistance K. 'Therefore the operating voltage V〇FF rises. On the contrary, when (T) will follow L, the field's brewing declines, because the thermistor rises, so the resistance of the thumb will be known as the voltage V〇FF(T) will drop accordingly. Ff (D., because the rise of the operating power will cause the gate drive signal to rise, so the non-曰硗 low logic position 匕 non-daily 矽溥 film transistor voltage L with suppression of lightning, * 7 ΛΑ I &lt ; lower, and then the rise of the claws, to ensure that the liquid crystal display's positive A* hang 4 乍〇h multi-photograph 12, the 12th picture shows the system is the 柘 汲 汲 及 and the low button 躯 矾 之The high and low clamps are temperature-adjusted. The high logic level of the scan drive signal and the low logic level change before the 'voltages VON(1) and VqFF(t). ^;, do not rise with the operation T1 to the temperature T4 , operating voltage v〇N ( T ) : 〇 儿 ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' Decrease V0砰(1) depending on the temperature rise, causing 1 operating voltage field cans; 201211972

The low logic level Vgl of the TW6361PA rises to the low logic level of the scan drive signal G(T4) gl4. Conversely, when the temperature T1 drops to the temperature of 丁5, the operating voltage = 〇N(1) rises with temperature, causing scanning. The gate signal level Vgh of the driving signal g(ti) rises to the high logic level Vgh5 of the sweep driving signal G(T5), and the operating voltage v〇FF(7) decreases as the temperature drops, resulting in the scan driving signal G (T1). The low logic level % drops to the low logic level vgi5 of scan drive designation G (T5). #^Second Embodiment Example Referring to Fig. 10 in Fig. 10, Fig. 10 is a circuit diagram showing an adaptive power supply circuit in accordance with the third embodiment. The adaptive power supply circuit 226 shown in FIG. 5 is, for example, the adaptive power supply circuit 9 第 shown in FIG. 1 , and the temperature sensing element 226 a and the voltage adjustment circuit shown in FIG. 5 are, for example, the 10th. The temperature sensing element 90a and the voltage adjusting circuit 9B are shown. The temperature sensing element 9A includes a negative temperature coefficient thermistor scale, Φ and the voltage adjusting circuit 90b includes a buffer 910, a bias circuit 920, a bias circuit 930, a clamp circuit 940, and a feedback circuit 950. , Comparator 960 and Rabbit Electric Pump 970 (Charge Pump). The feedback circuit 950 includes resistors R3 and R4 and provides a feedback voltage FB according to the operating voltage V〇N (τ). The comparator outputs a comparison voltage Vc based on the wheeling voltage Vy of the buffer and the feedback voltage FB. The charging help ice 970 outputs an operating voltage v〇N(T) according to the reference voltage. The skew circuit 920 is coupled to the buffer 91〇 and sets the attack voltage Vy(max) of the buffer 91〇 to determine the maximum value of the operating voltage γ〇Ν(τ).

201211972 IW6361PA value. The bias circuit 920 includes a constant current source II and a resistor R1 and provides a bias voltage Vx to the power supply terminal of the buffer 910. Among them, the bias voltage Vx=nxRi. Since the power supply terminal of the buffer 91 receives the bias voltage ν , the maximum output voltage Vy (max) of the buffering 910 is equal to the bias voltage ν χ . Therefore, the maximum value of the operating voltage VON(T) is equal to (4) + urgency. The bias circuit 93 is connected to the thermistor RT and the buffer 91A. The clamp circuit 940 is coupled to the output of the buffer 9ι and sets the minimum output voltage Vy(min) of the buffer 910 to determine the minimum value of the operating voltage V0N(T). For example, when the minimum output voltage Vy(min) of the buffer 91〇 is equal to L24V, the minimum value of the operating voltage ν〇Ν(τ} is equal to 丨μ ♦ I. When the output voltage Vy of the buffer w〇 is between When between 1.24 and Vx, the % of the pinch voltage of the buffer 91 will change with the I voltage VNTC, so that the operating voltage v〇n(t) is equal to (9)G + f). Since the voltage VNTC is dynamically adjusted with the thermistor RT, the operating voltage VON(T) will be dynamically adjusted with temperature to ensure the positive operation of the liquid crystal display. In addition, the adaptive power supply circuit 9G can also step the maximum and minimum values of the operating voltage side (7). The power supply circuit 90 is adjusted to operate the electric house.

If not MM, ^V〇N(T) is taken as an example, and the present invention is not limited thereto, and the adaptive power supply voltage v〇FFa> adjustment operation. The present invention uses the above-described plurality of embodiments to make the high logic bit of the iron signal. Quasi or low 遴耝 & Huai &# ',,,,, 闸 驱 驱 敫 士 士 士 士 士 士 辑 辑 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随 随201211972

TW6361PA In summary, although the invention has been disclosed above in the preferred embodiments, it is not intended to limit the invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a conventional amorphous germanium liquid crystal display. Φ Figure 2 shows a block diagram of an amorphous germanium gate driver 140. Figure 3 is a circuit diagram showing the Nth stage shift register. Figure 4 is a timing diagram of the signal shown in Figure 3. Fig. 5 is a view showing an amorphous germanium liquid crystal display according to an embodiment of the present invention. Fig. 6 is a circuit diagram showing an adaptive power supply circuit in accordance with the first embodiment. Fig. 7 is a view showing the operation voltage corresponding to the first embodiment as a function of temperature. Fig. 8 is a circuit diagram showing an adaptive power supply circuit in accordance with the second embodiment. Fig. 9 is a view showing the operation voltage corresponding to the second embodiment as a function of temperature. Fig. 10 is a circuit diagram showing an adaptive power supply circuit in accordance with the third embodiment. Figure 11 shows the high logic level of the gate drive signal with temperature 201211972 TW6361PA * - Adjustment diagram. Figure 12 is a schematic diagram showing the high logic level of the gate drive signal and the low logic level as a function of temperature. [Main component symbol description] 10. Conventional amorphous chopped liquid crystal display Atom 2 0: Amorphous broken liquid crystal according to the embodiment of the present invention is not 110, 210. Liquid crystal panels 120, 220: Control circuit boards 122, 222: DC converters 124, 224: potential converters 130, 230: source drivers 140, 240: amorphous gate drivers 226: adaptive power circuits 226a, 60a, 80a, 90a: temperature sensing elements 226b, 60b, 80b 90b: voltage adjustment circuit 910: buffer 920, 930: bias circuit 940: clamp circuit 950: feedback circuit 960: comparator 970: charging pump Π, 12: constant current source VON, VOFF: direct current Voltage 201211972

• TW6361PA VON(T), V0FF(T): Operating voltage Vc: Compare voltage

Vy: output voltage

Vx : Bias VNTC : Voltage FB : Feedback voltage CK1 , CK2 : Clock signal STV : Start signal

VSS: Operating voltage OUT]~ουτΝ: Gate drive signal SR] to SRN+1: Shift register Μ1~M4, Q1, Q2: Transistor Τ, ΤΙ, Τ2, Τ3, Τ4, Τ5: Temperature

Rl, R2, R3, R4, R5: Resistance RT: Thermistor

Vgh, Vgh2, Vgh3, Vgh4, Vgh5: high logic level Vgl, Vgl2, Vgl3, Vgl4, Vgl5: low logic level

Claims (1)

201211972 TW6361PA VII. Patent application scope: . 'Amorphous silicon gate driver (ASG) control circuit board, the amorphous gate driver is used to output a plurality of gate drive signals, the control The circuit board includes: a DC power converter for providing a first DC voltage; an adaptive power circuit comprising: a temperature sensing component for sensing a temperature; a temperature sensing component, and outputting a An operation-voltage adjustment circuit is coupled to dynamically adjust the first DC voltage according to the temperature; and '.^ " to drive the pole drive to the amorphous gate driver according to the first operation One of the first logic bits of the signal is in phase. . Wide 2. If you apply for a patent range! The item is staying. Shangqifeng .m, the ^ system board, issued 5 Haidi a logic level is a high logic level. /, 2nd ~ control circuit board, its f.3⁄4 ^ ^ ^ t * 』: r, _ connected to the transistor: the first end and the electro-crystal 'sensing component system —; patent range first tear (4) The circuit board, #弟一避辑准系系为为low logic level. r ^ 5 Control circuit board as claimed in item 4 of the patent application, wherein; 201211972 • TW6361PA voltage adjustment circuit includes: a transistor, The first end of the transistor receives the first DC voltage, and the second end of the transistor outputs the first operating voltage; a first resistor is coupled between the control end of the transistor and a ground. The temperature sensing element is coupled between the first end of the transistor and the control end of the transistor. 6. The control circuit board of claim 1, wherein the DC power converter further provides a second DC voltage, the voltage adjustment circuit dynamically adjusts the second DC voltage according to the temperature to output a second operating voltage, and the potential converter determines one of the gate driving signals according to the second operating voltage Low logic level. The potential converter is based on the first The second operating voltage outputs the signal to the amorphous gate driver such that one of the gate drive signals has a second logic level associated with the second operating voltage. 7. The control circuit of claim 6 a board, wherein the first logic level and the second logic level are respectively a high logic level and a low logic level. 8. The control circuit board of claim 1, wherein the The voltage adjustment circuit includes: a buffer; a first bias circuit, I is connected to the buffer, and sets a maximum output voltage of the buffer to determine a maximum value of the first operating voltage; a biasing circuit coupled to the temperature sensing component and the buffer; and a clamping circuit coupled to the output of the buffer and setting a minimum output voltage of the buffer to determine the first The operating voltage of the most 17 201211972 D W636IPA value of the patent scope of the scope of the eighth and the voltage adjustment circuit further includes: work system 9. such as pressure; circuit board, wherein the feedback circuit, according to the first operating voltage Supplying-receiving a comparator, according to the buffer, a comparison voltage; the output voltage and the feedback voltage are sent to a charging pump for outputting the first operating voltage according to the reference voltage. The control circuit board of the above aspect, wherein the temperature sensing component is a thermistor.