Glass-based electromagnetic control array based on TFT varactor and TFT driver array

Abstract

The present invention discloses a glass-based electromagnetic control array based on a TFT varactor and a TFT drive array, belonging to the field of magnetic control arrays. Aiming at the traditional TFT-LCD display semiconductor process, the present invention proposes a new glass-based electromagnetic control array technology based on a combination of TFT varactors and TFT array drivers to jointly control metal excitation units. The glass-based electromagnetic control array based on the display semiconductor process has the advantages of supporting flexible and transparent forms, ultra-high integration, high reliability, and high precision, can achieve precise control, has low manufacturing cost, and is 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] The rapid development of technologies such as wireless communications, radar detection, and electronic countermeasures has led to higher demands for precise control of electromagnetic waves. Traditional electromagnetic control methods rely on mechanical adjustments or complex electronic circuits, which suffer from slow control speed, low precision, and high cost. In recent years, electromagnetic control arrays based on microelectronics have become a research hotspot due to their high integration, fast response, and flexible control. However, existing electromagnetic control arrays often use silicon-based materials, which have limitations such as high manufacturing costs, 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 process. 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 control is expected to develop a new type of high-efficiency and low-cost electromagnetic control 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 in the prior art of electromagnetic control arrays that often use silicon-based materials, have high manufacturing costs, lack of transparency and poor flexibility.

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

[0006] Multiple 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 achieved by controlling the parasitic capacitance of the TFT varactor via a low-frequency voltage signal. The two signal terminals are connection points on both sides of the TFT varactor, forming an equivalent capacitance to transmit high-frequency signals. The metal patch or signal ground is connected to at least one signal terminal of the TFT varactor. By controlling the voltage at the control terminal of the TFT varactor, the equivalent capacitance of the TFT varactor is changed, thereby changing the electromagnetic coupling characteristics of the metal patch.

[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 terminal of the TFT varactor, the gate serves as another signal terminal, and the control terminal is connected to the gate, 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 the connection of the source and 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 serve as signal terminals respectively, the source is grounded, and the gate serves as the control terminal. The signal terminal of the source 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.

[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 serve as signal terminals respectively, the source is grounded, and the drain serves as the control terminal. The signal terminal of the source is the positive terminal of the equivalent capacitor of the TFT varactor, and the signal terminal of the gate is the negative terminal 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 serve as signal terminals respectively, the drain is grounded, and the source serves as the control terminal. 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 terminals, and the other serves as a control terminal, the gate driver sequentially activates the TFT driving unit 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 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 configured 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, changing the equivalent capacitance of the TFT varactor by controlling the control terminal voltage of the TFT varactor so as to change the electromagnetic coupling characteristics of the metal patch includes:

[0019] By controlling the change in the equivalent capacitance of the TFT varactor, the metal patch equivalent diameter 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 varactors and TFT drive arrays in the embodiments of the present invention proposes a new glass-based electromagnetic control array technology based on a combination of TFT varactors and TFT array drivers to jointly control metal excitation units for traditional TFT-LCD display semiconductor processes. The glass-based electromagnetic control array based on display semiconductor processes has the advantages of supporting flexible forms and supporting transparent forms, and has the advantages of ultra-high integration, high reliability, and high precision. It can achieve precise control, is low in cost, and is suitable for large-scale manufacturing.

[0021] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may 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 readily 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 They are all 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 Schematic diagram of a TFT driving array according to an embodiment of the present invention;

[0028] Figure 6 for Figure 3A Schematic diagram of the 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] The following describes embodiments of the present invention in detail, 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 are not to 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 driver array, comprising:

[0032] Multiple electromagnetic control units composed of TFT varactors and metal patches. The TFT varactor includes a control terminal and two signal terminals. The control terminal is achieved by controlling the parasitic capacitance of the TFT varactor through a low-frequency voltage signal. The two signal terminals are connection points on both sides of the TFT varactor, forming an equivalent capacitor to transmit high-frequency signals. The metal patch or signal ground is connected to at least one signal terminal of the TFT varactor. By controlling the voltage at the control terminal of the TFT varactor, the equivalent capacitance of the TFT varactor is changed, thereby changing the electromagnetic coupling characteristics of the metal patch.

[0033] A TFT driving array is composed of multiple 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 the figure, 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 manner (such as a thin wire).

[0035] like Figure 2A As shown in FIG, the structure of the TFT varactor is as follows: the source and drain of the TFT tube are connected and grounded as a signal terminal of the TFT varactor, the gate serves as another signal terminal, and the control terminal is connected to the gate in a high-resistance 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 the connection of the source and drain is the negative electrode of the equivalent capacitor of the TFT varactor.

[0036] like Figure 2B As shown in FIG, the structure of the TFT varactor is as follows: the source and drain of the TFT tube serve as signal terminals respectively, the source is grounded, and the gate serves 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 in FIG, the structure of the TFT varactor is as follows: the source and gate of the TFT tube serve as signal terminals respectively, the source is grounded, and the drain serves 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 in FIG, the structure of the TFT varactor is as follows: the drain and gate of the TFT tube serve as signal terminals respectively, the drain is grounded, and the source serves 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, a single metal patch electromagnetic control unit is formed by connecting one signal terminal of the TFT varactor. Figure 3A 、 Figure 3B 、 Figure 3C 、 Figure 3D As shown, or connecting the two signal terminals of the TFT varactor to form a bimetallic patch electromagnetic control unit, such as Figure 4A 、 Figure 4B 、 Figure 4C 、 Figure 4D As shown, a metal patch is connected to at least one signal terminal of a TFT varactor, and an electromagnetic control unit is formed by controlling the voltage at the control terminal. Multiple TFT varactors and corresponding metal patches form an electromagnetic control unit, and multiple electromagnetic control units and multiple TFT drive units form an electromagnetic control array.

[0040] Furthermore, the equivalent capacitance of each TFT varactor can be adjusted by controlling the voltage at the terminal. The voltage change causes the equivalent capacitance of the TFT varactor to change. The change in equivalent capacitance causes the equivalent aperture, impedance and other characteristics of the metal patch to change, 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 This is a TFT-based array control circuit. Each node has a charge and discharge capacitor. The horizontal and vertical control circuits can quickly and accurately manage the voltage of the charge and discharge capacitors, typically in 256 voltage steps. The charge and discharge capacitors are connected to the control terminals of the aforementioned TFT-based variable capacitance electromagnetic control units. By precisely 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 serve as two signal terminals, and the other serves as a control terminal. The gate driver sequentially activates the TFT driving unit 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. The timing control circuit coordinates the operation of the gate driver and the source driver to ensure voltage stability and voltage refresh of all charge and discharge capacitors in the array.

[0043] The embodiments of the present invention accurately change the voltage of the charge and discharge varactor through the TFT driving array. This voltage controls the control terminal of the TFT varactor, thereby changing the control terminal voltage of the TFT varactor, thereby achieving precise control of the electromagnetic characteristics of the electromagnetic control array.

[0044] exist Figure 5 The driving control circuit of the TFT array 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 driving control circuit:

[0045] Gate driver: Responsible for controlling row (or column) scanning in the array, activating the control TFTs row by row (or column by column), turning on the control TFTs of each unit 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 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 driver unit, controlling the charge and discharge capacitor voltages, 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 across each electromagnetic control unit varactor can be controlled, achieving different electromagnetic control effects. Support for high grayscale levels allows for higher precision in unit electromagnetic control.

[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 can be said for the case where the metal patch electromagnetic control unit constitutes a complete glass-based electromagnetic control array.

[0052] According to the glass-based electromagnetic control array based on TFT varactor and TFT driving 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 driver 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, and has the advantages of ultra-high integration, high reliability and high precision. It 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" 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 expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or N embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0054] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "N" means at least two, such as two, three, etc., unless otherwise specifically defined.

Claims

1. A glass-based electromagnetic control array based on TFT varactor and TFT driver array, characterized in that: include: Multiple 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 achieved by controlling the parasitic capacitance of the TFT varactor via a low-frequency voltage signal. The two signal terminals are connection points on both sides of the TFT varactor, forming an equivalent capacitance to transmit high-frequency signals. The metal patch or signal ground is connected to at least one signal terminal of the TFT varactor. By controlling the voltage at the control terminal of the TFT varactor, the equivalent capacitance of the TFT varactor is changed, thereby changing the electromagnetic coupling characteristics of the metal patch. A TFT driving array composed of multiple 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; 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 terminals, and the other serves as a control terminal. 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 to each activated charge and discharge capacitor, thereby controlling the control terminal voltage of the TFT varactor. The timing control circuit coordinates the operation of the gate driver and the source driver to ensure voltage stability and voltage refresh of all charge and discharge capacitors in the array. The method changes the equivalent capacitance of the TFT varactor by controlling the control terminal voltage of the TFT varactor so as to change the electromagnetic coupling characteristics of the metal patch, including: By controlling the change in the equivalent capacitance of the TFT varactor, the metal patch equivalent diameter 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.

2. The glass-based electromagnetic control array based on TFT varactor and TFT driver 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 terminal of the TFT varactor, the gate serves as another signal terminal, and the control terminal is connected to the gate, 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 the connection of the source and 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 driver array according to claim 1, characterized in that: The structure of the TFT varactor is: The source and drain of the TFT tube serve as signal terminals respectively, the source is grounded, and the gate serves as the control terminal. The signal terminal of the source 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.

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

5. The glass-based electromagnetic control array based on TFT varactor and TFT driver array according to claim 1, characterized in that: The structure of the TFT varactor is: The drain and gate of the TFT tube serve as signal terminals respectively, the drain is grounded, and the source serves as the control terminal. 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 driver array according to claim 1, 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.

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