Electronic device

Abstract

The present disclosure provides an electronic device. The electronic device includes a substrate and a pixel circuit. The substrate has an active region and a peripheral region. The peripheral region is adjacent to the active region. The pixel circuit is disposed on the active region of the substrate. The pixel circuit includes an amplifier circuit and an adjustable element. The amplifier circuit includes a non-inverting input terminal, an inverting input terminal, and an output terminal. The output terminal is electrically connected to the inverting input terminal, so that the amplifier circuit constitutes a negative feedback circuit. The adjustable element is electrically connected to the output terminal of the amplifier circuit.

Description

Technical Field

[0001] This disclosure relates to an electronic device, and more particularly to an electronic device including adjustable elements. Background Technology

[0002] In the prior art, when the diode in the adjustable element is operating under reverse bias, the diode has an unstable cross voltage, causing variations in the equivalent capacitance. Summary of the Invention

[0003] This disclosure provides an electronic device that enables a diode in an adjustable element to have a stable voltage across the diode and reduces the variability of the equivalent capacitance.

[0004] The electronic device disclosed herein includes a substrate and a pixel circuit. The substrate has an active region and a peripheral region. The peripheral region is adjacent to the active region. The pixel circuit is disposed on the substrate and within the active region. The pixel circuit includes an amplifier circuit and an adjustable element. The amplifier circuit includes a non-inverting input terminal, an inverting input terminal, and an output terminal. The output terminal is electrically connected to the inverting input terminal so that the amplifier circuit constitutes a negative feedback circuit. The adjustable element is electrically connected to the output terminal of the amplifier circuit.

[0005] The electronic device disclosed herein includes an amplifier circuit and an adjustable element. The amplifier circuit includes a non-inverting input, an inverting input, and an output. The output is electrically connected to the inverting input to enable the amplifier circuit to form a negative feedback circuit. The adjustable element is electrically connected to the output of the amplifier circuit.

[0006] To make the foregoing more understandable, several embodiments, accompanied by accompanying drawings, are described in detail below. Attached Figure Description

[0007] Figure 1 A block diagram showing an embodiment of an electronic device of the present disclosure;

[0008] Figure 2 Show Figure 1 A block diagram of the pixel circuit in the embodiment;

[0009] Figure 3A A block diagram of a pixel circuit according to an embodiment of the present disclosure is shown;

[0010] Figure 3B Show Figure 3A A waveform diagram of the control signal;

[0011] Figure 4A A block diagram illustrating a pixel circuit according to another embodiment of the present disclosure;

[0012] Figure 4B Show Figure 4AA waveform diagram of the control signal. Detailed Implementation

[0013] This disclosure can be understood by referring to the following detailed description in conjunction with the accompanying drawings. It should be noted that, for ease of understanding and for the sake of brevity, many of the drawings in this disclosure depict only a portion of the electronic device, and certain components in the drawings are not drawn to scale. Furthermore, the number and dimensions of the components in the drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure.

[0014] In the following description and claims, the words “containing” and “including” are open-ended terms and should therefore be interpreted as “containing but not limited to…”.

[0015] It should be understood that although the terms first, second, third… can be used to describe multiple components, the components are not limited to these terms. These terms are used only to distinguish a single component from other components in the specification. The same terms may not be used in the claims, but rather replaced by first, second, third… in the order of the elements declared in the claims. Therefore, in the following description, a first component may be a second component in the claims.

[0016] In some embodiments of this disclosure, terms such as "connection" and "interconnection," unless specifically defined, may refer to two structures being in direct contact, or to two structures not being in direct contact, with other structures disposed between them. Furthermore, these terms may include situations where both structures are movable or both structures are fixed. Additionally, the term "coupled" includes any direct and indirect electrical connection means. In the case of a direct electrical connection, the endpoints of components on two circuits are directly connected or interconnected by a conductor segment, while in the case of an indirect electrical connection, the endpoints of components on two circuits are connected by a switch, diode, capacitor, inductor, resistor, other suitable components, or combinations thereof, but are not limited thereto.

[0017] The electronic devices disclosed herein may include, but are not limited to, display devices, antenna devices, sensing devices, light-emitting devices, or splicing devices. The electronic devices may include bendable or flexible electronic devices. The electronic devices may include electronic components. Electronic devices may include, for example, liquid crystal layers or light-emitting diodes (LEDs). Electronic components may include passive and active components, such as capacitors, resistors, inductors, variable capacitors, filters, diodes, transistors, sensors, microelectromechanical systems (MEMS) components, liquid crystal chips, controllers, etc., but are not limited to these. Diodes may include light-emitting diodes or photodiodes. Light-emitting diodes may include, for example, organic light-emitting diodes (OLEDs), miniLEDs, microLEDs, quantum dot LEDs, fluorescent, phosphorescent, or other suitable materials, or combinations thereof, but are not limited to these. Sensors may include, for example, capacitive sensors, optical sensors, electromagnetic sensors, fingerprint sensors (FPS), touch sensors, antennas, or pen sensors, but are not limited to these. Controllers may include, for example, timing controllers, but are not limited to these. The following description uses a display device as an example of an electronic device, but this disclosure is not limited thereto.

[0018] Reference will now be made in detail to exemplary embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same element references are used in the drawings and description to denote the same or similar parts.

[0019] Figure 1 A block diagram of an electronic device according to an embodiment of the present disclosure is shown. Figure 2 Show Figure 1 A block diagram of the pixel circuit in the embodiment. Please refer to... Figure 2The electronic device 100 includes an amplifier circuit 122 and a tunable element 124. The amplifier circuit 122 includes a non-inverting input IN1, an inverting input IN2, and an output OUT. According to some embodiments, the output OUT of the amplifier circuit 122 is electrically connected to the inverting input IN2, so that the amplifier circuit 122 constitutes a negative feedback circuit. The tunable element 124 is electrically connected to the output OUT of the amplifier circuit 122.

[0020] Please refer to some embodiments. Figure 1 and Figure 2 The electronic device 100 includes a substrate 110 and a pixel circuit 120. The substrate 110 has an active region AA and a peripheral region PA, with the peripheral region PA adjacent to the active region AA. The pixel circuit 120 is disposed on the substrate 110 and within the active region AA. The active region AA may be disposed, for example, at the center of the substrate 110, and the peripheral region PA may be disposed, for example, at the edge of the substrate 110 (this disclosure is not limited thereto). Specifically, the peripheral region PA may be closer to the side 110S of the substrate 110 than the active region AA. The active region AA may be a region for emitting and receiving electromagnetic waves.

[0021] According to some embodiments, such as Figure 1 As shown, the electronic device 100 includes a substrate 110, a pixel circuit 120, and a driving circuit 130. The substrate 110 has an active region AA and a peripheral region PA. The peripheral region PA is adjacent to the active region AA. The pixel circuit 120 and the driving circuit 130 are disposed on the substrate 110 and within the active region AA, respectively. The driving circuit 130 is used to drive the respective pixel circuit 120.

[0022] like Figure 2 As shown, pixel circuit 120 includes amplifier circuit 122 and adjustable element 124. Amplifier circuit 122 operates, for example, between a first operating voltage ARVDD and a second operating voltage ARVSS. Adjustable element 124 is represented by the equivalent circuit of diode D3 and its junction capacitance C3. Adjustable element 124 may include diode D3. In this embodiment, adjustable element 124 may be a communication element. Adjustable element 124 may be, for example, a varactor, a radio frequency component, or a radio frequency radiation element. The present invention does not limit the type of adjustable element 124. According to some embodiments, specific parameters (e.g., physical parameters) of the adjustable element may be adjusted according to the applied signal. Specific parameters may include, for example, capacitance, inductance, resistance, dielectric constant, or combinations thereof.

[0023] like Figure 2As shown, the electronic device 100 includes a data line DL and a first control element 126. The pixel circuit 120 is coupled to the data line DL via the first control element 126. The drive circuit 130 outputs at least one control signal Ctrl1 to control the conduction state of the first control element 126. The first control element 126 receives the data voltage VD provided by the data line DL. When the first control element 126 is turned on, the data voltage VD can be input to the amplifier circuit 122.

[0024] Figure 3A A block diagram of a pixel circuit according to an embodiment of the present disclosure is shown. According to some embodiments, such as... Figure 2 As shown, the pixel circuit 120 includes an amplifier circuit 122 and an adjustable element 124. The amplifier circuit 122 includes a non-inverting input terminal IN1, an inverting input terminal IN2, and an output terminal OUT. The output terminal OUT is electrically connected to the inverting input terminal IN2, so that the amplifier circuit 122 constitutes a negative feedback circuit. The adjustable element 124 is electrically connected to the output terminal OUT of the amplifier circuit 122. The pixel circuit 120 includes the amplifier circuit 122, the adjustable element 124, a first control element 126, and a first storage capacitor C1. The first storage capacitor C1 is electrically connected between the first control element 126 and the amplifier circuit 120. The amplifier circuit 122 includes an amplifier 200 and resistors R1 and R2. The amplifier 200 includes a non-inverting input terminal IN1, an inverting input terminal IN2, and an output terminal OUT. One end of resistor R1 is coupled to ground, and the other end of resistor R1 is coupled to the inverting input terminal IN2. One end of resistor R2 is coupled to the inverting input terminal IN2, and the other end of resistor R2 is coupled to the output terminal OUT. The output terminal OUT is electrically connected to the inverting input terminal IN2 through resistor R2, so that amplifier circuit 122 forms a negative feedback circuit. Adjustable element 124 is electrically connected to the output terminal OUT of amplifier circuit 120. First control element 126 is used to receive the data voltage VD provided by data line DL. First storage capacitor C1 is electrically connected between first control element 126 and amplifier circuit 122.

[0025] Figure 3B Show Figure 3A The waveform diagram of the control signal is shown below. Please refer to it. Figure 3A and Figure 3BThe first control element 126 is controlled by the first control signal Ctrl1. The control signal (first control signal) Ctrl1 is used to control the conduction state of the first control element 126. The control signal Ctrl1 includes a first period P1 and a second period P2. Taking the first control element 126 as an example, which includes an N-type transistor, during the first period P1, the control signal Ctrl1 is at a high level (first level), causing the first control element 126 to conduct. Therefore, the data voltage VD can charge the first storage capacitor C1, making the voltage at the non-inverting input terminal IN1 equal to the data voltage VD. At this time, the inverting input terminal IN2 serves as another input terminal of the amplifier 200, and its voltage is also equal to the data voltage VD. During the second period P2, the control signal Ctrl1 is at a low level (second level), causing the first control element 126 to de-conduct.

[0026] like Figure 3A and Figure 3B As shown, due to the negative feedback circuit architecture of amplifier 122, the voltage at the non-inverting input IN1 is the same as the voltage at the inverting input IN2. The current I is determined by the voltage at the inverting input IN2 and the resistor R1, and the output voltage is the voltage across resistor R2 plus the voltage at the inverting input IN2. Therefore, the data voltage VD is amplified and a stable inverting voltage is generated at the output OUT, and the diode D3 in the adjustable element 124 operates at a stable inverting bias. Therefore, the junction of diode D3 forms a stable reverse-bias capacitor C3, ensuring the proper operation of subsequent circuits coupled to the adjustable element 124.

[0027] Figure 4A A block diagram of a pixel circuit according to another embodiment of the present disclosure is shown. Figure 4B Show Figure 4A A waveform diagram of the control signal. Figure 4A The amplifier circuit in the image is designated 123. Pixel circuit 120 includes amplifier circuit 123 and adjustable element 124. Amplifier circuit 123 includes a non-inverting input IN1, an inverting input IN2, and an output OUT. Output OUT is electrically connected to the inverting input IN1, so that amplifier circuit 123 constitutes a negative feedback circuit. Figure 3B Similarly, the pixel circuit 120 includes a first control element 126 and a first storage capacitor C1. Additionally, please refer to... Figure 4A and Figure 4BThe pixel circuit 120 also includes a second control element 128 and a second storage capacitor C2. The amplifier circuit 123 also has a negative feedback circuit architecture. The second control element 128 and its non-inverting input IN1 are coupled to ground voltage GND. The second storage capacitor C2 is electrically connected between the second control element 128 and the amplifier circuit 123. Control signal Ctrl1 is used to control the conduction state of the first control element 126 and the switching element 221. Control signal (second control signal) Ctrl2 is used to control the conduction state of the second control element 128 and the switching element 222. The first control element 126 is controlled by the first control signal Ctrl1, and the second control element is controlled by the second control signal Ctrl2. Control signals Ctrl1 and Ctrl2 include a first period P1 and a second period P2.

[0028] Please refer to Figure 4A and Figure 4B Taking the first control element 126, which includes an N-type transistor, as an example, during the first period P1, the control signal Ctrl1 is high (first level), turning on the first control element 126 and the switching element 221. Taking the second control element 128, which also includes an N-type transistor, as an example, the control signal Ctrl2 is low (second level), turning off the second control element 128 and the switching element 222. Therefore, the data voltage VD can charge node N1 of the first storage capacitor C1 and node N2 of the second storage capacitor C2, making the voltages of nodes N1 and N2 equal to the data voltage VD. At this time, since the non-inverting input IN1 is coupled to the ground voltage GND, the inverting input IN2, as another input of the amplifier 200, also has a voltage equal to the ground voltage GND. On the other hand, since the switching element 221 is in the on state, the voltage of the output terminal OUT can be reset to a DC voltage.

[0029] During the second period P2, control signal Ctrl1 is low (second level), de-conducting the first control element 126 and switch element 221, while control signal Ctrl2 is high (first level), conducting the second control element 128 and switch element 222. Due to the negative feedback circuit architecture of the amplifier circuit, based on the virtual short-circuit principle, the voltage at the inverting input terminal IN2 will be the same as the voltage at the non-inverting input terminal IN1, which is equal to the ground voltage. At this time, the positive charge at the left end of the second storage capacitor C2 will flow to ground, and the negative charge at the right end of the second storage capacitor C2 will flow to the right end of the first storage capacitor C1. Therefore, the positive charge at the left end of the first storage capacitor C1 will double, thus amplifying the data voltage VD at node N1 by a factor of two. Consequently, the data voltage VD is amplified and generates a stable reverse voltage at the output terminal OUT (and causes diode D3 in the adjustable element 124 to operate at a stable reverse bias). Therefore, the junction of diode D3 will form a stable reverse-bias capacitor C3, which ensures that the subsequent circuits coupled to the adjustable element 124 can operate normally.

[0030] In summary, in the embodiments of this disclosure, the electronic device includes an amplifier circuit and an adjustable element. The amplifier circuit constitutes a negative feedback circuit, and the adjustable element is electrically connected to the output of the amplifier circuit. The adjustable element may include a diode. The amplifier circuit can stabilize the transverse voltage of the adjustable element operating at an inverting bias through the negative feedback circuit, thereby accurately controlling the equivalent capacitance of the adjustable element and reducing the variability of the equivalent capacitance.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electronic device comprising: A substrate having an active region and a peripheral region, the peripheral region being adjacent to the active region; as well as A pixel circuit is disposed on the substrate and within the active region, the pixel circuit comprising: An amplifier circuit includes a non-inverting input terminal, an inverting input terminal, and an output terminal, wherein the output terminal is electrically connected to the inverting input terminal, so that the amplifier circuit constitutes a negative feedback circuit; and An adjustable element, electrically connected to the output terminal of the amplifier circuit; and The data cable is disposed on the substrate and within the active area. The pixel circuit includes: A first control element is used to receive the data voltage provided by the data line; A first storage capacitor is electrically connected between the first control element and the amplifier circuit; The second control element is electrically connected to the ground voltage; and The second storage capacitor is electrically connected between the second control element and the amplifier circuit.

2. The electronic device according to claim 1, The second control element is controlled by a second control signal, which includes a first period and a second period. During the first period, the second control signal is at a second level, causing the second control element to be de-energized; and during the second period, the second control signal is at a first level, causing the second control element to be energized.

3. The electronic device of claim 2, wherein during the first period, the voltage at the output terminal of the amplifier circuit is reset to a DC voltage.

4. The electronic device according to claim 2, The first control element is controlled by a first control signal, which includes a first period and a second period. During the first period, the first control signal is at the first level, causing the first control element to be turned on; and during the second period, the first control signal is at the second level, causing the first control element to be turned off.

5. The electronic device according to claim 1, wherein the adjustable element is a variable capacitor.

6. The electronic device of claim 1, wherein the adjustable element is a radio frequency element.

7. An electronic device comprising: An amplifier circuit includes a non-inverting input terminal, an inverting input terminal, and an output terminal, wherein the output terminal is electrically connected to the inverting input terminal so that the amplifier circuit constitutes a negative feedback circuit. as well as An adjustable element is electrically connected to the output terminal of the amplifier circuit; The first control element is used to receive the data voltage provided by the data line; A first storage capacitor is electrically connected between the first control element and the amplifier circuit; The second control element is electrically connected to the ground voltage; as well as The second storage capacitor is electrically connected between the second control element and the amplifier circuit.

8. The electronic device according to claim 7, The second control element is controlled by a second control signal, which includes a first period and a second period. During the first period, the second control signal is at a second level, causing the second control element to be de-energized; and during the second period, the second control signal is at a first level, causing the second control element to be energized.

9. The electronic device of claim 8, wherein during the first period, the voltage at the output terminal of the amplifier circuit is reset to a DC voltage.

10. The electronic device according to claim 8, The first control element is controlled by a first control signal, which includes a first period and a second period. During the first period, the first control signal is at the first level, causing the first control element to be turned on; and during the second period, the first control signal is at the second level, causing the first control element to be turned off.

11. The electronic device of claim 7, wherein the adjustable element is a variable capacitor.

12. The electronic device of claim 7, wherein the adjustable element is a radio frequency element.

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