Electronic device

Abstract

The present disclosure provides an electronic device including a light emitting unit and a voltage comparator. The voltage comparator is coupled to the light emitting unit and configured to receive a first voltage and a second voltage. When the first voltage is greater than the second voltage, the voltage comparator outputs a comparison signal having a first voltage level to turn on the light emitting unit. When the first voltage is less than the second voltage, the voltage comparator outputs a comparison signal having a second voltage level to turn off the light emitting unit. The electronic device of the present disclosure can effectively drive the light emitting unit.

Description

Technical Field

[0001] This disclosure relates to an apparatus, and more particularly to an electronic device having a light-emitting unit. Background Technology

[0002] Currently, most traditional light-emitting units used in displays are driven by active-matrix (AM) pulse-amplitude modulation (PAM). However, traditional driving methods often suffer from problems such as excessively large amounts of display data, data loss during brightness adjustments, and the appearance of water ripples when a camera captures the light-emitting unit. Summary of the Invention

[0003] This disclosure relates to an electronic device that can effectively drive a light-emitting unit.

[0004] According to an embodiment of this disclosure, the electronic device includes a light-emitting unit and a voltage comparator. The voltage comparator is coupled to the light-emitting unit and is used to receive a first voltage and a second voltage. When the first voltage is greater than the second voltage, the voltage comparator outputs a comparison signal having a first voltage level to turn on the light-emitting unit. When the first voltage is less than the second voltage, the voltage comparator outputs a comparison signal having a second voltage level to turn off the light-emitting unit.

[0005] Based on the above, the electronic device disclosed herein can drive light-emitting units of a random type active-matrix (AM) array.

[0006] 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 display 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. Attached Figure Description

[0007] Figure 1 These are circuit diagrams of electronic devices according to some embodiments of this disclosure;

[0008] Figure 2 This is a pixel circuit diagram of a pixel in some embodiments of this disclosure;

[0009] Figure 3 These are timing diagrams of the driving devices of some embodiments of the present disclosure;

[0010] Figure 4This is a schematic diagram of the voltage-brightness ratio curves of some embodiments disclosed herein;

[0011] Figure 5 This is a schematic diagram of the voltage-brightness ratio curves of some embodiments disclosed herein.

[0012] Explanation of reference numerals in the attached figures

[0013] 100: Electronic devices;

[0014] 110: Pixel array;

[0015] 120: Data drive;

[0016] 130: Scan driver;

[0017] 210: Voltage comparator;

[0018] 220: Light-emitting unit;

[0019] P(1,1)~P(n,m), 200: pixels;

[0020] Sa_1~Sa_m, Sa: First scan signal;

[0021] Sb: Second scan signal;

[0022] DL_1~DL_n, DL: Data signal lines;

[0023] SLa_1~SLa_m, SLa: First scan signal lines;

[0024] SLb: Second scan signal line;

[0025] Ds_1~Ds_n, Ds: Data signals;

[0026] P1: During the first frame;

[0027] P2: During the second frame;

[0028] 301, 302, 303, 304: Squares;

[0029] DV_1, DV_2~DV_M: Driver timing;

[0030] t0~t14: Time;

[0031] 401~403, 501, 502: Voltage value-brightness ratio curves. Detailed Implementation

[0032] Reference will now be made in detail to exemplary embodiments of the invention, 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.

[0033] 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.

[0034] Throughout this specification and the appended claims, certain terms are used to refer to specific elements. Those skilled in the art will understand that electronic device manufacturers may use different names to refer to the same components. This document is not intended to distinguish between components that function identically but have different names. In the following specification and claims, words such as "containing" and "comprising" are open-ended terms and should therefore be interpreted as meaning "containing but not limited to...".

[0035] In some embodiments disclosed herein, terms such as “connection” and “interconnection”, unless specifically defined, may refer to two structures in direct contact, or to two structures not 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 terms “electrical connection” and “coupling” include any direct and indirect electrical connection means.

[0036] The ordinal numbers used in the specification and claims, such as "first," "second," etc., to modify elements, do not in themselves imply or represent any prior ordinal number for that or those components, nor do they represent the order of one element with another, or the order of manufacturing methods. The use of these ordinal numbers is solely to clearly distinguish one named element from another element with the same name. The claims and specification may not use the same terminology; therefore, a first component in the specification may be a second component in the claims. It should be understood that the following embodiments can be implemented by substituting, recombining, or combining technical features from several different embodiments without departing from the spirit of this disclosure to complete other embodiments.

[0037] It should be understood that the features in the following embodiments can be replaced, recombined, or mixed to complete other embodiments without departing from the spirit of this disclosure. Features between embodiments can be arbitrarily mixed and combined as long as they do not violate the spirit of the invention or conflict with it.

[0038] The electronic devices disclosed herein may include, but are not limited to, display devices, antenna devices, sensing devices, touch displays, packaging devices, curved displays, or free-shape displays. The electronic devices may be bendable or flexible. Antenna devices may be, for example, liquid crystal antennas or variable capacitor antennas, but are not limited to these. Antenna devices may include, for example, antenna splicing devices, but are not limited to these. Packaging devices may be suitable for wafer-level packaging (WLP) or panel-level packaging (WLP) technologies, such as chip-first or reverse-dip (RDL) first processes. It should be noted that the electronic devices may be any combination of the foregoing, but are not limited to these. Furthermore, the shape of the electronic devices may be rectangular, circular, polygonal, with curved edges, or other suitable shapes. The electronic devices may include electronic components. Electronic components may include passive and active components, such as capacitors, resistors, inductors, diodes, transistors, etc. Diodes may include light-emitting diodes (LEDs) or photodiodes. LEDs may include, for example, organic light-emitting diodes (OLEDs), mini LEDs, micro LEDs, or quantum dot LEDs, but are not limited thereto. Electronic devices may have peripheral systems such as drive systems, control systems, light source systems, etc., to support display devices, antenna devices, wearable devices (e.g., augmented reality or virtual reality), automotive devices (e.g., automotive windshields), or splicing devices.

[0039] Figure 1 This is a circuit diagram of an electronic device according to some embodiments of this disclosure. (See reference...) Figure 1 The electronic device 100 includes a pixel array 110, a data driver 120, and a scan driver 130. The pixel array 110 includes a plurality of pixels P(1,1) to P(n,m), where m and n are positive integers. The data driver 120 is coupled to a plurality of pixels P(1,1) to P(n,m) in a plurality of columns of the pixel array 110 via a plurality of data signal lines DL_1 to DL_n. The scan driver 130 is coupled to a plurality of pixels P(1,1) to P(n,m) in a plurality of rows of the pixel array 110 via a plurality of first scan signal lines SLa_1 to SLa_m and a second scan signal line SLb.

[0040] In this embodiment, the data driver 120 can provide data signals Ds_1 to Ds_n with a first voltage and a second voltage to multiple data signal lines DL_1 to DL_n in a time-division multiple manner. The scan driver 130 can provide first scan signals Sa_1 to Sa_m to multiple first scan signal lines SLa_1 to SLa_m, and provide a second scan signal Sb to multiple second scan signal lines SLb. In this embodiment, each row of pixels P(1,1) to P(n,m) can be turned on at different times according to the first scan signals Sa_1 to Sa_m, so as to obtain data signals Ds_1 to Ds_n with the first voltage at different times, wherein each row of pixels P(1,1) to P(n,m) can obtain data signals with the same or different first voltages. In this embodiment, each row of pixels P(1,1) to P(n,m) can be turned on at the same time according to the second scan signal Sb, so as to obtain data signals with the second voltage simultaneously.

[0041] Figure 2 This is a schematic diagram of the pixel circuit of a pixel in some embodiments of this disclosure. (Reference) Figure 2 , Figure 1 Each of the pixels P(1,1) to P(n,m) in the embodiment can be implemented as follows: Figure 2 The pixel circuit architecture is shown. In this embodiment, pixel 200 includes a voltage comparator 210, a light-emitting unit 220, a first scanning transistor T1, a second scanning transistor T2, and storage capacitors C1 and C2. The output terminal of voltage comparator 210 is coupled to light-emitting unit 220. The first terminal of the first scanning transistor T1 is coupled to data signal line DL. The second terminal of the first scanning transistor T1 is coupled to the first input terminal of voltage comparator 210. The control terminal of the first scanning transistor T1 is coupled to the first scanning signal line SLa. The first terminal of the second scanning transistor T2 is coupled to data signal line DL. The second terminal of the second scanning transistor T2 is coupled to the second input terminal of voltage comparator 210. The control terminal of the second scanning transistor T2 is coupled to the second scanning signal line SLb. The first terminal of storage capacitor C1 is coupled to the second terminal of scanning transistor T1. The second terminal of storage capacitor C1 is coupled to ground voltage. The first terminal of storage capacitor C2 is coupled to the second terminal of second scanning transistor T2. The second terminal of storage capacitor C2 is coupled to ground voltage. In this embodiment, the first scanning transistor T1 and the second scanning transistor T2 may be N-type transistors (e.g., N-type metal-oxide-semiconductor (NMOS) transistors), but this disclosure is not limited thereto.

[0042] In this embodiment, when the first scan transistor T1 is turned on according to the first scan signal Sa provided by the first scan signal line SLa, the data signal line DL can provide a data signal Ds with a first voltage V1 to the first terminal of the scan transistor T1, so that the first voltage V1 is stored in the storage capacitor C1 through the scan transistor T1. Then, when the scan transistor T2 is turned on according to the second scan signal Sb provided by the second scan signal line SLb, the data signal line DL can provide a data signal Ds with a second voltage V2 to the first terminal of the scan transistor T2, so that the second voltage V2 is stored in the storage capacitor C2 through the scan transistor T2.

[0043] In this embodiment, the first and second terminals of the voltage comparator 210 can receive a first voltage V1 and a second voltage V2, respectively. When the voltage value of the first voltage V1 is greater than the voltage value of the second voltage V2, the voltage comparator 210 outputs a comparison signal VC with a first voltage level (e.g., a high voltage level) to turn on the light-emitting unit 220. When the voltage value of the first voltage V1 is less than the voltage value of the second voltage V2, the voltage comparator 210 outputs a comparison signal VC with a second voltage level (e.g., a low voltage level) to turn off the light-emitting unit 220. In this embodiment, the first scanning transistor T1 can be turned on during a first period to provide the first voltage V1 to the first input terminal of the voltage comparator 210, and the second scanning transistor T2 can be turned on during a second period to provide the second voltage V2 to the second input terminal of the voltage comparator 210, wherein the first and second periods do not overlap. In some embodiments, the first scanning transistor T1 may be turned on during a first period to provide a first voltage V1 to the first input terminal of the voltage comparator 210, and the second scanning transistor T2 may be turned on during a second period to provide a second voltage V2 to the second input terminal of the voltage comparator 210, wherein the first period and the second period may overlap, but this disclosure is not limited thereto.

[0044] In this embodiment, the data driver (e.g.) Figure 1The data driver 120 can provide a data signal Ds with a first voltage V1 to the pixel 200 according to the display data, and can randomly provide a data signal Ds with a second voltage V2 to the pixel 200. For example, the voltage values ​​of the first voltage V1 and the second voltage V2 can both be between 0 volts and 10 volts. However, the voltage value of the first voltage V1 can be a fixed voltage value (e.g., 5 volts) determined according to the display data of the current frame, while the voltage value of the second voltage V2 can be a random value randomly selected between 0 volts and 10 volts. In this regard, whether the light-emitting unit 220 is turned on or off is determined according to the voltage value of the second voltage V2. In this embodiment, the data driver can update the first voltage V1 of the data signal Ds frame by frame, and the data driver can update the second voltage V2 of the data signal Ds according to the vertical clock (V clock) signal of the panel, wherein the vertical clock signal can switch multiple times between frames. In other words, the comparison signal VC output by the voltage comparator 210 can change with the voltage value of the second voltage V2, thereby dynamically turning the light-emitting unit 220 on or off. Therefore, the brightness ratio of the light-emitting unit 220 in one frame can conform to the following formula (1). In the following formula (1), B% can be the brightness ratio, L_on can be the number of times the light-emitting unit 220 is turned on during one frame, L_off can be the number of times the light-emitting unit 220 is turned off during one frame, and DR% can be the duty ratio of the vertical clock signal.

[0045]

[0046] In some embodiments, DR% may also be generated based on a horizontal synchronization (Hsync) signal and / or a vertical synchronization (Vsync) signal, wherein the horizontal synchronization signal and the vertical synchronization signal (which may be used, for example, to determine the switching frequency between frames) may conform to the following relationship, and it can be seen from the following relationship that the frequency of the horizontal synchronization signal may be higher than the frequency of the vertical synchronization signal.

[0047] (Formula): Hsync = Vsync × N (i.e., the number of times frames can be further segmented)

[0048] Figure 3 This is a timing diagram of the drive of an electronic device according to some embodiments of this disclosure. (See reference...) Figure 1 as well as Figure 3 The driving timing of pixels P(1,1) to P(n,m) can be as follows: Figure 3As shown. In this embodiment, the driving timing DV_1 can correspond to the voltage write results of pixels P(1,1) to P(n,1). The driving timing DV_2 can correspond to the voltage write results of pixels P(1,2) to P(n,2). And so on, the driving timing DV_M can correspond to the voltage write results of pixels P(1,M) to P(n,M). In this embodiment, the period from time t0 to time t8 can be the first frame period P1, and the period from time t9 to time t14 can be the second frame period P2.

[0049] For the first frame period P1, during the period from time t0 to time t1, the first scan signal Sa_1 may be at a high voltage level, for example, to turn on the first transistors of pixels P(1,1) to P(n,1). Data signal lines DL_1 to DL_n may provide data signals Ds_1 to Ds_n with the same or different voltage values ​​according to the light emission (or based on display data) requirements of the current frame. Therefore, corresponding to block 301, pixels P(1,1) to P(n,1) may be written to (or updated) with a new voltage value during the period from time t0 to time t1. Furthermore, during the period from time t0 to time t1, the first scan signals Sa_2 to Sa_m may be at a low voltage level, for example, to turn off the first transistors of pixels P(1,2) to P(n,M). Therefore, corresponding to block 302, pixels P(1,2) to P(1,m) may not be written to (or updated) with a new voltage value during the period from time t0 to time t1. Furthermore, the second scan signal Sb may be at a low voltage level during the period from time t0 to time t1, in order to turn off the second transistors of pixels P(1,1) to P(n,m).

[0050] During the period from time t1 to time t2, corresponding to a periodic switch of the vertical clock signal, the second scan signal Sb can be, for example, a high voltage level to turn on the second transistors of pixels P(1,1) to P(n,m), and the data signal lines DL_1 to DL_n can synchronously provide data signals Ds_1 to Ds_n with the second voltage. Therefore, corresponding to block 303, pixels P(1,1) to P(n,m) can be synchronously written with a second voltage with a new voltage value (random value) during the period from time t1 to time t2. In this way, the voltage comparators of each pixel P(1,1) to P(n,m) can determine whether to turn on or off based on the voltage values ​​of the first and second voltages currently stored.

[0051] During the period from time t2 to time t3, corresponding to the next periodic switch of the vertical clock signal, the second scan signal Sb can be, for example, a high voltage level to turn on the second transistors of pixels P(1,1) to P(n,m), and the data signal lines DL_1 to DL_n can synchronously provide data signals Ds_1 to Ds_n with another second voltage. Therefore, corresponding to block 304, pixels P(1,1) to P(n,m) can be synchronously written with another second voltage with another new voltage value (another random value) during the period from time t2 to time t3. In this way, the voltage comparators of each pixel P(1,1) to P(n,m) can determine whether to turn on or off based on their respective currently stored first voltage and the voltage value of the other second voltage. In other words, in this embodiment, the voltage values ​​of the second voltages stored by pixels P(1,1) to P(n,m) are updated with the vertical clock signal.

[0052] During the period from time t4 to time t5, the first scan signal Sa_2 may be at a high voltage level, for example, to turn on the first transistors of pixels P(1,2) to P(n,2). Data signal lines DL_1 to DL_n may provide data signals Ds_1 to Ds_n with the same or different voltage values ​​according to the light emission (or display) requirements of the current frame. Therefore, pixels P(1,2) to P(n,2) may be written to (or updated) with a new voltage value during the period from time t4 to time t5. Furthermore, during the period from time t4 to time t5, the first scan signals Sa_1, Sa_3 to Sa_m may be at a low voltage level, for example, to turn off the first transistors of pixels P(1,1) to P(n,1) and P(1,3) to P(n,M). Therefore, pixels P(1,2) to P(1,m) may not be written to (or updated) with a first voltage during the period from time t4 to time t5. Furthermore, the second scan signal Sb may be at a low voltage level during time t4 to time t5 to turn off the second transistors of pixels P(1,1) to P(n,m). Similarly, pixels P(1,m) to P(n,m) may be written to (or updated) with a first voltage value during time t6 to time t7. Therefore, the voltage value of the first voltage stored in each row of pixels P(1,1) to P(n,m) can be updated sequentially according to the illumination requirements of the current frame (or based on display data).

[0053] Similarly, for the second frame period P2, pixels P(1,1) to P(n,1) can be written to (or updated) with a new first voltage value during time t8 to time t9. Pixels P(1,2) to P(n,2) can be written to (or updated) with a new first voltage value during time t10 to time t11. Pixels P(1,m) to P(n,m) can be written to (or updated) with a new first voltage value during time t12 to time t13. In other words, in this embodiment, the voltage values ​​of the first voltage stored by each pixel P(1,1) to P(n,m) are updated frame by frame.

[0054] Therefore, the pixels P(1,1) to P(n,m) in this embodiment can emit light randomly during a frame (or even during the entire light emission process), thus achieving a random light emission effect in both time and space. This effectively overcomes the problem of water ripples appearing in the image captured by the camera of the light emission unit. Furthermore, for example, assuming that the voltage relationship curve (e.g., the X-axis can be the voltage scale value, brightness ratio, or grayscale value, while the Y-axis can be the voltage value) is linear, if pixel P(1,1) wants to display 100% brightness (i.e., present the highest brightness) during the first frame, then the voltage value of the first voltage V1 obtained by pixel P(1,1) during the first frame can be, for example, 10 volts (the voltage value of the first voltage V1 can be between 0 volts and 10 volts). Therefore, regardless of the voltage value of the second voltage V2 obtained by pixel P(1,1) during the first frame (the voltage value of the second voltage V1 can be randomly selected between 0 volts and 10 volts), pixel P(1,1) will be turned on during the first frame, thus achieving the result of displaying 100% brightness (i.e., presenting the highest brightness). For example, if pixel P(1,1) wants to display 50% brightness (i.e., half brightness) during the second frame, the voltage value of the first voltage V1 obtained by pixel P(1,1) during the second frame can be, for example, 5 volts (the voltage value of the first voltage V1 can be between 0 volts and 10 volts). Therefore, since the probability that the voltage value of the second voltage V2 obtained by pixel P(1,1) during the second frame is higher than the voltage value of the first voltage V1 is 50% (i.e., in one hundred random changes, there may be fifty times when the randomly selected voltage value of the second voltage V2 is higher than the voltage value of the first voltage V1), based on the above equation (1), pixel P(1,1) can achieve the result of displaying 50% brightness (i.e., half brightness) during the second frame. In some embodiments, the voltage relationship curve (e.g., the X-axis can be the voltage scale value, brightness ratio, or grayscale value, while the Y-axis can be the voltage value) can also be a non-linear relationship, and this disclosure is not limited thereto.

[0055] Figure 4This is a schematic diagram of the voltage-brightness ratio curves of some embodiments disclosed herein. (Reference) Figure 4 The first voltage and second voltage described in the various embodiments of this disclosure can be generated by a data driver based on display data and, as well as... Figure 4 The linear voltage-brightness ratio curve 401, the decreasing nonlinear voltage-brightness ratio curve 402, or the increasing nonlinear voltage-brightness ratio curve 403 shown are used to generate the signal, where the curvature of the nonlinear curve can be determined based on the internal resistance of the voltage comparator. The linear voltage-brightness ratio curve 401, the decreasing nonlinear voltage-brightness ratio curve 402, and the increasing nonlinear voltage-brightness ratio curve 403 respectively represent the relationship between the brightness ratio of the displayed data and the voltage value. For example, the data driver can determine the corresponding voltage value as the first voltage based on the brightness ratio (or grayscale value) corresponding to a certain pixel in the current image data. Therefore, the electronic device disclosed herein can achieve effective light emission (or display) driving without the need to bind the gamma curve to the driving voltage of the light-emitting unit.

[0056] Figure 5 This is a schematic diagram of the voltage-brightness ratio curves of some other embodiments disclosed herein. (See reference) Figure 5 In some embodiments, the electronic devices described in the present disclosure may adjust the brightness of the light-emitting unit, for example, by digital setting. In this regard, the data driver may determine the voltage values ​​of the first voltage and the second voltage, for example, based on the same voltage-brightness ratio curve 501, but the brightness ratios (or grayscale values) corresponding to the voltage values ​​of the first voltage and the second voltage are different.

[0057] Alternatively, in other embodiments, the electronic devices described in the embodiments of this disclosure may adjust the brightness of the light-emitting unit in an analog setting manner, for example. In this regard, the data driver may determine the first voltage based on the voltage-brightness ratio curve 501, and the second voltage based on the voltage-brightness ratio curve 502, wherein the first voltage is equal to the second voltage multiplied by a certain attenuation coefficient (e.g., 0.7). In other words, the first voltage and the second voltage may be generated according to different voltage-brightness ratio curves.

[0058] Alternatively, in some other embodiments, the electronic device described in the present disclosure may adjust the brightness of the light-emitting unit by adjusting the duty cycle of the vertical clock signal, for example, during the brightness adjustment process. In this regard, as shown in equation (1) above, the brightness ratio of the light-emitting unit is proportional to the duty cycle DR% of the vertical clock signal. Therefore, the data driver can adjust the brightness of the light-emitting unit by changing the duty cycle DR% of the vertical clock signal.

[0059] It should be noted that in other embodiments disclosed herein, Figure 4 and Figure 5 The various relationship curves shown can also be represented as voltage-grayscale value relationship curves or other forms of gamma curves.

[0060] In summary, the electronic device disclosed herein can provide a voltage comparator in each pixel, and provide a first voltage with a fixed value in a frame and a second voltage that changes randomly with the vertical clock signal to the voltage comparator, which can dynamically turn the light-emitting unit on or off in a frame, and can realize active array pulse width modulation light-emitting unit driving.

[0061] 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, characterized in that, include: Light-emitting unit; as well as A voltage comparator, coupled to the light-emitting unit, is used to receive a first voltage and a second voltage. The first voltage is generated based on a first relationship curve describing the ratio of voltage value to brightness, and the second voltage is generated based on a second relationship curve describing the ratio of voltage value to brightness. The first relationship curve is different from the second relationship curve, and the curvature of the first relationship curve and the curvature of the second relationship curve are set according to the internal resistance value of the voltage comparator. When the first voltage is greater than the second voltage, the voltage comparator outputs a comparison signal with a first voltage level to turn on the light-emitting unit. When the first voltage is less than the second voltage, the voltage comparator outputs a comparison signal with a second voltage level to turn off the light-emitting unit.

2. The electronic device according to claim 1, characterized in that, The first voltage is updated frame by frame, and the second voltage is updated with the vertical clock signal.

3. The electronic device according to claim 1, characterized in that, The voltage value of the second voltage is a random value.

4. The electronic device according to claim 1, characterized in that, The light-emitting unit is turned on or off based on the voltage value of the second voltage.

5. The electronic device according to claim 1, characterized in that, The brightness ratio of the light-emitting unit conforms to the following formula: Where B% is the brightness ratio, L_on is the number of times the light-emitting unit is turned on during one frame, L_off is the number of times the light-emitting unit is turned off during one frame, and DR% is the duty cycle of the vertical clock signal.

6. The electronic device according to claim 1, characterized in that, Also includes: Multiple pixels, each including the light-emitting unit and the voltage comparator, The plurality of pixels receive the second voltage through the data signal line.

7. The electronic device according to claim 6, characterized in that, The plurality of pixels further individually include: A first scanning transistor, wherein the control terminal of the first scanning transistor is coupled to a first scanning signal line, a first terminal of the first scanning transistor is coupled to the data signal line, and a second terminal of the first scanning transistor is coupled to the first input terminal of the voltage comparator; as well as The second scanning transistor has a control terminal coupled to a second scanning signal line, a first terminal coupled to the data signal line, and a second terminal coupled to the second input terminal of the voltage comparator.

8. The electronic device according to claim 7, characterized in that, The first scan transistor is turned on during a first period to provide the first voltage to a first input of the voltage comparator, and the second scan transistor is turned on during a second period to provide the second voltage to a second input of the voltage comparator, wherein the first period and the second period do not overlap.

9. The electronic device according to claim 1, characterized in that, The brightness of the light-emitting unit is proportional to the duty cycle of the vertical clock signal.

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