Glass-based electromagnetic regulation and control array based on TFT varactor and TFT driving array

Abstract

The invention discloses a glass-based electromagnetic regulation and control array based on a TFT varactor and a TFT driving array, belongs to the field of magnetic regulation and control arrays, and provides a brand-new glass-based electromagnetic regulation and control array technology based on combination of the TFT varactor and the TFT driving array to jointly regulate and control a metal excitation unit aiming at a traditional TFT-LCD display semiconductor technology. The glass-based electromagnetic regulation and control array based on the display semiconductor process has a flexible supporting form and a transparent supporting form, has the advantages of ultrahigh integration level, high reliability and high precision, can realize accurate regulation and control, and is low in manufacturing cost and suitable for large-scale manufacturing.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic control arrays, and in particular to a glass-based electromagnetic control array based on a TFT varactor and a TFT drive array. Background Art

[0002] With the rapid development of wireless communication, radar detection, electronic countermeasures and other technologies, higher requirements are placed on the ability to precisely control electromagnetic waves. Traditional electromagnetic control methods mostly rely on mechanical adjustment or complex electronic circuits, and have problems such as slow adjustment speed, low precision, and high cost. In recent years, electromagnetic control arrays based on microelectronics technology have gradually become a research hotspot due to their advantages such as high integration, fast response and flexible control. However, electromagnetic control arrays in existing technologies often use silicon-based materials, which have shortcomings such as high manufacturing cost, lack of transparency and poor flexibility.

[0003] With the rapid development of modern electronic technology, the demand for high-performance, high-integration and low-cost electronic components is growing. As a core component of modern display technology, the application scope of thin film transistors (TFT) is no longer limited to the field of liquid crystal display (LCD), but has gradually expanded to many aspects of radio frequency (RF) electronics, sensor technology, and microelectronic systems. Among them, TFT thin film transistors have shown great potential in the production of varactors due to their unique structural characteristics and manufacturing processes. In recent years, with the advancement of display technology, glass-based TFTs have shown broad application prospects in many fields due to their good electrical properties, transparency and processability. Introducing TFT technology into the field of electromagnetic regulation is expected to develop a new type of high-efficiency and low-cost electromagnetic regulation array. Summary of the invention

[0004] The present invention provides a glass-based electromagnetic control array based on TFT varactors and TFT drive arrays to solve the problems that the electromagnetic control arrays in the prior art often use silicon-based materials, have high manufacturing costs, lack of transparency and poor flexibility.

[0005] The embodiment of the present invention provides a glass-based electromagnetic control array based on a TFT varactor and a TFT driving array, comprising:

[0006] A plurality of electromagnetic control units composed of TFT varactors and metal patches, wherein the TFT varactor includes a control terminal and two signal terminals, the control terminal is realized by controlling the parasitic capacitance of the TFT varactor through a low-frequency voltage signal, and the two signal terminals are connection points on both sides of the TFT varactor to form an equivalent capacitance to transmit a high-frequency signal; the metal patch or the signal ground is connected to at least one signal terminal of the TFT varactor, and the equivalent capacitance of the TFT varactor is changed by controlling the control terminal voltage of the TFT varactor, so that the electromagnetic coupling characteristics of the metal patch are changed;

[0007] A TFT driving array is composed of a plurality of TFT driving units, each TFT driving unit is connected to an electromagnetic control unit, and the control terminal voltage of each electromagnetic control unit is controlled by the TFT driving unit.

[0008] Optionally, in one embodiment of the present invention, the structure of the TFT varactor is:

[0009] The source and drain of the TFT tube are connected and grounded as a signal end of the TFT varactor, the gate is used as another signal end, and the control end is connected to the gate, wherein the signal end of the gate is the positive electrode of the equivalent capacitor of the TFT varactor, and the signal end formed by connecting the source and the drain is the negative electrode of the equivalent capacitor of the TFT varactor.

[0010] Optionally, in one embodiment of the present invention, the structure of the TFT varactor is:

[0011] The source and drain of the TFT tube are used as signal terminals respectively, the source is grounded, and the gate is used as a control terminal, wherein the signal terminal of the source is the positive electrode of the equivalent capacitor of the TFT varactor, and the signal terminal of the drain is the negative electrode of the equivalent capacitor of the TFT varactor.

[0012] Optionally, in one embodiment of the present invention, the structure of the TFT varactor is:

[0013] The source and gate of the TFT tube are used as signal terminals respectively, the source is grounded, and the drain is used as a control terminal, wherein the signal terminal of the source is the positive electrode of the equivalent capacitor of the TFT varactor, and the signal terminal of the gate is the negative electrode of the equivalent capacitor of the TFT varactor.

[0014] Optionally, in one embodiment of the present invention, the structure of the TFT varactor is:

[0015] The drain and gate of the TFT tube are used as signal terminals respectively, the drain is grounded, and the source is used as a control terminal, wherein the signal terminal of the gate is the positive terminal of the equivalent capacitor of the TFT varactor, and the signal terminal of the drain is the negative terminal of the equivalent capacitor of the TFT varactor.

[0016] Optionally, in one embodiment of the present invention, the TFT driving unit includes a regulating TFT tube, a charge and discharge capacitor, a gate driver, a source driver and a timing control circuit; wherein, the gate of the regulating TFT tube is connected to the gate driver, the source is connected to the source driver, the drain, the gate, and any two ends of the gate serve as two signal ends, and the other serves as a control end, the gate driver sequentially activates the TFT driving units of each row or column of the TFT driving array, or the source driver provides a charge and discharge voltage signal for each activated charge and discharge capacitor, thereby controlling the control terminal voltage of the TFT varactor, and the timing control circuit coordinates the operation of the gate driver and the source driver to ensure the voltage stability and voltage refresh of all charge and discharge capacitors in the array.

[0017] Optionally, in one embodiment of the present invention, the timing control circuit is specifically used to generate a clock signal, a synchronization signal and / or an enable signal to coordinate the timing of the gate driver and the source driver.

[0018] Optionally, in one embodiment of the present invention, the control terminal voltage of the TFT varactor is controlled to change the equivalent capacitance of the TFT varactor so that the electromagnetic coupling characteristic of the metal patch is changed, including:

[0019] By controlling the change of the equivalent capacitance of the TFT varactor, the metal patch equivalent caliber and impedance characteristics of the metal patch are changed, and the distribution characteristics of the metal patch current are changed, thereby changing the electromagnetic radiation or scattering characteristics of the TFT varactor and the metal patch.

[0020] The glass-based electromagnetic control array based on TFT varactor and TFT driving array in the embodiment of the present invention proposes a new glass-based electromagnetic control array technology based on TFT varactor and TFT array driving combination to jointly control the metal excitation unit for the traditional TFT-LCD display semiconductor process. The glass-based electromagnetic control array based on the display semiconductor process has the advantages of supporting flexible form and supporting transparent form, ultra-high integration, high reliability and high precision, can realize precise control, and has low cost, and is suitable for large-scale manufacturing.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 This is a schematic diagram of a TFT tube according to an embodiment of the present invention;

[0024] Figure 2A , Figure 2B , Figure 2C , Figure 2D All of them are structural diagrams of TFT varactors according to embodiments of the present invention;

[0025] Figure 3A , Figure 3B , Figure 3C , Figure 3D For the embodiment of the present invention Figure 2A , Figure 2B , Figure 2C , Figure 2D The single metal patch electromagnetic control unit corresponding to the TFT varactor;

[0026] Figure 4A , Figure 4B , Figure 4C , Figure 4D For the embodiment of the present invention Figure 2A , Figure 2B , Figure 2C , Figure 2D The bimetallic patch electromagnetic control unit corresponding to the TFT varactor;

[0027] Figure 5 A schematic diagram of a TFT driving array according to an embodiment of the present invention;

[0028] Figure 6 for Figure 3A Schematic diagram of a glass-based electromagnetic control array corresponding to the electromagnetic control unit;

[0029] Figure 7 for Figure 4A Schematic diagram of the glass-based electromagnetic control array corresponding to the electromagnetic control unit. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] The present invention proposes a glass-based electromagnetic control array based on a TFT varactor and a TFT driving array, comprising:

[0032] A plurality of electromagnetic control units composed of TFT varactor and metal patches, wherein the TFT varactor includes a control terminal and two signal terminals, the control terminal is realized by controlling the parasitic capacitance of the TFT varactor through a low-frequency voltage signal, and the two signal terminals are connection points on both sides of the TFT varactor to form an equivalent capacitance to transmit a high-frequency signal; the metal patch or the signal ground is connected to at least one signal terminal of the TFT varactor, and the equivalent capacitance of the TFT varactor is changed by controlling the control terminal voltage of the TFT varactor, so that the electromagnetic coupling characteristics of the metal patch are changed;

[0033] A TFT driving array is composed of a plurality of TFT driving units, each TFT driving unit is connected to an electromagnetic control unit, and the control terminal voltage of each electromagnetic control unit is controlled by the TFT driving unit.

[0034] Thin-film transistor (TFT) is a semiconductor device widely used in liquid crystal displays (LCD) and other display technologies. TFT works by controlling the current through an electric field. Figure 1 As shown in FIG. 1 , it consists of four main parts: source, drain, gate and semiconductor film. The voltage change on the gate can control the flow of electrons in the semiconductor film, thereby adjusting the current between the source and drain. Based on the basic process principle of TFT, the present invention proposes four ways to construct TFT varactor, which are respectively: Figure 2A , Figure 2B , Figure 2C , Figure 2D As shown, the control end is a low-frequency voltage signal that controls the parasitic capacitance of the TFT, and the two signal ends are high-frequency signals that form signal connection points on both sides of the capacitor. When necessary, the control end is directly connected to the signal end in a high-resistance (such as a thin wire) manner.

[0035] like Figure 2A As shown, the structure of the TFT varactor is: the source and drain of the TFT tube are connected and grounded as a signal terminal of the TFT varactor, the gate is used as another signal terminal, and the control terminal is connected to the gate in a high-impedance manner, wherein the signal terminal of the gate is the positive electrode of the equivalent capacitor of the TFT varactor, and the signal terminal formed by connecting the source and the drain is the negative electrode of the equivalent capacitor of the TFT varactor.

[0036] like Figure 2B As shown, the structure of the TFT varactor is: the source and drain of the TFT tube are respectively used as signal terminals, the source is grounded, and the gate is used as a control terminal, wherein the signal terminal of the source is the positive electrode of the equivalent capacitor of the TFT varactor, and the signal terminal of the drain is the negative electrode of the equivalent capacitor of the TFT varactor.

[0037] like Figure 2CAs shown, the structure of the TFT varactor is: the source and gate of the TFT tube are respectively used as signal terminals, the source is grounded, and the drain is used as a control terminal, wherein the signal terminal of the source is the positive electrode of the equivalent capacitor of the TFT varactor, and the signal terminal of the gate is the negative electrode of the equivalent capacitor of the TFT varactor.

[0038] like Figure 2D As shown, the structure of the TFT varactor is: the drain and gate of the TFT tube are respectively used as signal terminals, the drain is grounded, and the source is used as a control terminal, wherein the signal terminal of the gate is the positive electrode of the equivalent capacitor of the TFT varactor, and the signal terminal of the drain is the negative electrode of the equivalent capacitor of the TFT varactor.

[0039] In the embodiment of the present invention, the metal patch is connected to at least one signal terminal of the TFT varactor, that is, connected to one signal terminal of the TFT varactor to form a single metal patch electromagnetic control unit. Figure 3A , Figure 3B , Figure 3C , Figure 3D As shown, or connecting the two signal ends of the TFT varactor to form a bimetallic patch electromagnetic control unit, such as Figure 4A , Figure 4B , Figure 4C , Figure 4D As shown, the metal patch is connected to at least one signal terminal of the TFT varactor, and an electromagnetic control unit is formed by controlling the voltage of the control terminal. Multiple TFT varactors and corresponding metal patches form an electromagnetic control unit, and multiple electromagnetic control units and multiple TFT driving units form an electromagnetic control array.

[0040] Furthermore, the equivalent capacitance of each TFT varactor can be adjusted by controlling the terminal voltage. The voltage change causes the change of the equivalent capacitance of the TFT varactor. The change of the equivalent capacitance causes the change of the equivalent aperture, impedance and other characteristics of the metal patch, further changing the distribution characteristics of the metal patch current, thereby changing the electromagnetic radiation or scattering characteristics of the metal patch.

[0041] Figure 5 It is an array control circuit based on TFT. Each node has a charge and discharge capacitor. The voltage of the charge and discharge capacitor can be quickly and accurately managed through the horizontal and vertical control circuit, which is generally 256 voltage steps. The charge and discharge capacitor is connected to the control end of the electromagnetic control unit based on the TFT varactor mentioned above. By accurately controlling the voltage and refresh rate, the equivalent capacitance of each electromagnetic control unit in the array can be controlled.

[0042] In this embodiment, the TFT driving unit includes a regulating TFT tube, a charge and discharge capacitor, a gate driver, a source driver and a timing control circuit; wherein, the gate of the regulating TFT tube is connected to the gate driver, the source is connected to the source driver, the drain, the gate, and any two ends of the gate are used as two signal ends, and the other is used as a control end, the gate driver activates the TFT driving unit of each row or column of the TFT driving array in sequence, or the source driver provides a charge and discharge voltage signal for each activated charge and discharge capacitor, thereby controlling the control terminal voltage of the TFT varactor, and the timing control circuit coordinates the work of the gate driver and the source driver to ensure the voltage stability and voltage refresh of all charge and discharge capacitors in the array.

[0043] The embodiment of the present invention accurately changes the voltage of the charge and discharge varactor through the TFT driving array. This voltage controls the control end of the TFT varactor, thereby changing the control end voltage of the TFT varactor, thereby achieving accurate control of the electromagnetic characteristics of the electromagnetic control array.

[0044] exist Figure 5 In the TFT array drive control circuit, the drive control circuit is composed of several key components, including the gate driver, source driver and timing controller. The following is the basic principle of the TFT array drive control circuit:

[0045] Gate driver: responsible for controlling the row (or column) scanning in the array, activating the control TFT tube row by row (or column by column), so that the control TFT tube of each unit is turned on in turn. The gate driver is usually integrated at the edge of the glass substrate and connected to the gate electrode of the TFT varactor.

[0046] Source driver: responsible for providing appropriate voltage signals to each TFT drive unit in the array. According to the input display data, the source driver generates corresponding analog or digital signals and transmits them to each TFT drive unit through the data line. The source driver is usually located on both sides or the bottom of the glass-based panel and is connected to the source electrode of the TFT array.

[0047] Timing control circuit: controls the timing of the entire TFT drive array operation process, including data transmission, line scanning and frame refresh. According to the display requirements, the timing control circuit generates various control signals, such as clock signals, synchronization signals and enable signals. These signals coordinate the operation of the gate driver and the source driver to ensure the correct display timing.

[0048] Data transmission: Data signals are transmitted from the source driver to the control TFT tube of each TFT drive unit to control the charging and discharging capacitor voltage, thereby changing the TFT varactor characteristics. Data signals are usually digital signals.

[0049] Frame refresh: In order to maintain the stability of array voltage control, the driving circuit of the TFT drive array needs to continuously refresh the control voltage, and the timing control circuit controls the entire refresh process.

[0050] Grayscale control: By adjusting the voltage output by the source driver, the voltage of each electromagnetic control unit varactor can be controlled to achieve different electromagnetic control effects. The support of high grayscale levels makes the unit electromagnetic control more accurate.

[0051] Figure 6 yes Figure 3A The single metal patch electromagnetic control unit consists of Figure 5 The TFT driving array drives the formation of a complete glass-based electromagnetic control array. Figure 3B , Figure 3C , Figure 3D The case where a single metal patch electromagnetic control unit constitutes a complete glass-based electromagnetic control array is analogous. Figure 7 yes Figure 4A The single metal patch electromagnetic control unit consists of Figure 5 The TFT driving array drives the formation of a complete glass-based electromagnetic control array. Figure 4B , Figure 4C , Figure 4D The same is true for the case where the metal patch electromagnetic control units constitute a complete glass-based electromagnetic control array.

[0052] According to the glass-based electromagnetic control array based on TFT varactor and TFT drive array proposed in the embodiment of the present invention, for the traditional TFT-LCD display semiconductor process, a new glass-based electromagnetic control array technology based on the combination of TFT varactor and TFT array drive is proposed to jointly control the metal excitation unit. The glass-based electromagnetic control array based on the display semiconductor process has the advantages of supporting flexible form and supporting transparent form, ultra-high integration, high reliability and high precision, can achieve precise control, and has low cost, and is suitable for large-scale manufacturing.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "N" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

Claims

1. A glass-based electromagnetic control array based on TFT varactor and TFT driving array, characterized in that: include: A plurality of electromagnetic control units composed of TFT varactors and metal patches, wherein the TFT varactor includes a control terminal and two signal terminals, the control terminal is realized by controlling the parasitic capacitance of the TFT varactor through a low-frequency voltage signal, and the two signal terminals are connection points on both sides of the TFT varactor to form an equivalent capacitance to transmit a high-frequency signal; the metal patch or the signal ground is connected to at least one signal terminal of the TFT varactor, and the equivalent capacitance of the TFT varactor is changed by controlling the control terminal voltage of the TFT varactor, so that the electromagnetic coupling characteristics of the metal patch are changed; A TFT driving array is composed of a plurality of TFT driving units, each TFT driving unit is connected to an electromagnetic control unit, and the control terminal voltage of each electromagnetic control unit is controlled by the TFT driving unit.

2. The glass-based electromagnetic control array based on TFT varactor and TFT driving array according to claim 1, characterized in that: The structure of the TFT varactor is: The source and drain of the TFT tube are connected and grounded as a signal end of the TFT varactor, the gate is used as another signal end, and the control end is connected to the gate, wherein the signal end of the gate is the positive electrode of the equivalent capacitor of the TFT varactor, and the signal end formed by connecting the source and the drain is the negative electrode of the equivalent capacitor of the TFT varactor.

3. The glass-based electromagnetic control array based on TFT varactor and TFT driving array according to claim 1, characterized in that: The structure of the TFT varactor is: The source and drain of the TFT tube are used as signal terminals respectively, the source is grounded, and the gate is used as a control terminal, wherein the signal terminal of the source is the positive electrode of the equivalent capacitor of the TFT varactor, and the signal terminal of the drain is the negative electrode of the equivalent capacitor of the TFT varactor.

4. The glass-based electromagnetic control array based on TFT varactor and TFT driving array according to claim 1, characterized in that: The structure of the TFT varactor is: The source and gate of the TFT tube are used as signal terminals respectively, the source is grounded, and the drain is used as a control terminal, wherein the signal terminal of the source is the positive electrode of the equivalent capacitor of the TFT varactor, and the signal terminal of the gate is the negative electrode of the equivalent capacitor of the TFT varactor.

5. The glass-based electromagnetic control array based on TFT varactor and TFT driving array according to claim 1, characterized in that: The structure of the TFT varactor is: The drain and gate of the TFT tube are used as signal terminals respectively, the drain is grounded, and the source is used as a control terminal, wherein the signal terminal of the gate is the positive terminal of the equivalent capacitor of the TFT varactor, and the signal terminal of the drain is the negative terminal of the equivalent capacitor of the TFT varactor.

6. The glass-based electromagnetic control array based on TFT varactor and TFT driving array according to any one of claims 1 to 5, characterized in that: The TFT driving unit includes a regulating TFT tube, a charge and discharge capacitor, a gate driver, a source driver and a timing control circuit; wherein the gate of the regulating TFT tube is connected to the gate driver, the source is connected to the source driver, the drain, the gate, and any two ends of the gate are used as two signal ends, and the other is used as a control end, the gate driver activates the TFT driving units of each row or column of the TFT driving array in sequence, or the source driver provides a charge and discharge voltage signal for each activated charge and discharge capacitor, thereby controlling the control terminal voltage of the TFT varactor, and the timing control circuit coordinates the work of the gate driver and the source driver to ensure the voltage stability and voltage refresh of all charge and discharge capacitors in the array.

7. The glass-based electromagnetic control array based on TFT varactor and TFT driving array according to claim 6, characterized in that: The timing control circuit is specifically used to generate a clock signal, a synchronization signal and / or an enable signal to coordinate the timing of the gate driver and the source driver.

8. The glass-based electromagnetic control array based on TFT varactor and TFT driving array according to claim 1, characterized in that: The method changes the equivalent capacitance of the TFT varactor by controlling the control terminal voltage of the TFT varactor so that the electromagnetic coupling characteristic of the metal patch is changed, including: By controlling the change of the equivalent capacitance of the TFT varactor, the metal patch equivalent caliber and impedance characteristics of the metal patch are changed, and the distribution characteristics of the metal patch current are changed, thereby changing the electromagnetic radiation or scattering characteristics of the TFT varactor and the metal patch.

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