KR102664522B1 - Electronic device capable of reducing color shift or increasing luminous efficacy - Google Patents

Abstract

The electronic device includes an electronic unit including a light emitting diode (LED) and a drive unit coupled to the light emitting diode to receive a data voltage. The electronic unit has a plurality of driving periods in the frame period, and the driving unit drives the LED according to the data voltage in the plurality of driving periods.

Description

Electronic device capable of reducing color shift or increasing luminous efficiency {ELECTRONIC DEVICE CAPABLE OF REDUCING COLOR SHIFT OR INCREASING LUMINOUS EFFICACY}

The present invention relates to electronic devices, and particularly to electronic devices that can reduce color shift or increase luminous efficacy.

In the prior art, an active matrix light-emitting diode display can drive light-emitting diodes (LEDs) by adjusting the current, so that the LEDs emit light with different brightness. (emit). However, the light emitted by LED is prone to color shift with changes in current, which seriously affects image quality. Accordingly, the present invention proposes an electronic device that can reduce color shift or increase luminous efficiency.

Additionally, the embodiment includes an electronic device including an electronic unit including a light emitting diode (LED) and a driving unit coupled to the light emitting diode for receiving a first data voltage. to provide. The electronic unit has a plurality of driving periods in the frame period, and the driving unit drives the LED according to the first data voltage in the plurality of driving periods.

These and other objects of the present invention will no doubt become apparent to those skilled in the art after reading the following detailed description of the various drawings and the embodiments shown in them.

1 is a diagram of an electronic device according to an embodiment of the present invention.
FIG. 2 is a circuit diagram of an electronic unit of the electronic device of FIG. 1.
Figure 3 shows the operational sequence of the first row of electronic units of the electronic device of Figure 1;
Figure 4 shows another operational sequence of the first row of electronic units of the electronic device of Figure 1;
Figure 5 shows another operational sequence of the first row of electronic units of the electronic device of Figure 1;
Figure 6 is a diagram of an electronic device according to another embodiment of the present invention.
FIG. 7 is a circuit diagram of an electronic unit of the electronic device of FIG. 6.
Figure 8 shows the operation sequence of the first row of electronic units of the electronic device of Figure 6;
Figure 9 shows another operational sequence of the first row of electronic units of the electronic device of Figure 6;

This application claims the benefit of U.S. Provisional Application No. 62/660,206, filed 2018/04/19, which is incorporated herein by reference.

As used herein, the terms “generally” and “roughly” mean 20%, 10% or 5% of a given value or range. The amounts given herein are approximate, and the terms "generally" and "approximately" are meant to be implied without specific description.

1 is a diagram of an electronic device 10 according to an embodiment of the present invention. The electronic device 10 may include a plurality of electronic units 100(1, 1) to 100(M, N), where M and N are positive integers of 2 or more. In some embodiments, the electronic units 100(1, 1) to 100(M, N) may be arranged in an array. In FIG. 1, the electronic units 100(1, 1) to 100(1, N) may be arranged in the same row, and the electronic units 100(1, 1) to 100(M, 1) may be arranged in the same row. )) can be placed in the same column. The first positive number in parentheses corresponds to the row, and the second positive number in parentheses corresponds to the column.

Figure 2 is a circuit diagram of the electronic unit 100(1, 1) according to one embodiment. In some embodiments, electronic units 100(1, 1) to 100(M, N) may have the same or different circuit configurations. In FIG. 2 , the electronic unit 100(1, 1) may include a light emitting diode (LED) 110, a driving unit 120, and a switch unit 130. The driving unit 120 may be coupled to the LED 110, and the switch unit 130 may be coupled to the driving unit 120. When two elements are referred to as being combined, these may include two elements that are electrically connected directly or connected to each other through another element. In one frame period of electronic unit 100(1, 1), storage of data voltages is performed first. For example, when the switch unit 130 of the electronic unit 100 (1, 1) is turned on, the driving unit 120 may receive the data voltage transmitted by the data line D1. . The data voltage is first stored in the capacitor of the driving unit 120, and then the driving unit 120 can drive the LED 110 by generating a corresponding amount of current according to the data voltage. Afterwards, LED 110 can emit corresponding brightness. LED 110 may include, but is not limited to, a micro-LED, mini-LED, organic light emitting diode (OLED), or other suitable light emitting diode component. In some embodiments, LED 110 may include quantum dot (QD) material, fluorescent material, phosphor material, or other suitable light converting material. It is not limited. Electronic device 10 may include, but is not limited to, a display device, a light emitting device, a sensing device, or other suitable device. In some embodiments, the electronic device 10 may be applied to a tiled device.

In some embodiments, as shown in Figure 2, switch unit 130 may include transistor M1A (eg, a switching transistor). The driving unit 120 may include, but is not limited to, transistor M2A (eg, driving transistor), capacitor C1A, and transistor M3A (eg, control transistor). Transistor M1A is coupled to scan line SN1 and data line D1. When the data voltage is stored, the scan voltage is transmitted through the scan line SN1 to turn on the transistor M1A, so that the capacitor C1A stores the data voltage transmitted by the data line D1. You can. The "storage of data voltage" process allows the transistor (M2A) to generate a current according to the data voltage in the subsequent drive cycle, and the transistor (M2A) controls the brightness emitted by the amount of current flowing through the LED or turns off the LED. It can be driven. In some embodiments, transistor M3A may be coupled to emission control line EM1 to control the turn on or turn off of transistor M3A by supplying a control voltage delivered by emission control line EM1. . The emission control line EM1 supplies a control voltage to turn on the transistor M3A during the driving period, and the emission control line EM1 supplies the transistor M3A in other periods (for example, intervals other than the driving period). (M3A) can be turned off, thereby adjusting the amount of current flowing through the LED or the time interval of the driving period to adjust the brightness of the light emitted by the LED. Although drive unit 120 of the present invention shows only transistor M2A, capacitor C1A, and transistor M3A, in other embodiments drive unit 120 may include other transistors, capacitors, or other circuit components. there is. For example, the driving unit 120 may include, but is not limited to, a compensation transistor and a reset transistor. In some embodiments, electronic unit 100(1, 1) may include a plurality of LEDs 110. Although the transistor of the present invention is shown only as a three-terminal transistor (gate terminal, drain terminal, and source terminal), in other embodiments some transistors may be four-terminal transistors (two gate terminals). , drain terminal and source terminal).

In the embodiment of FIG. 1, the electronic device 10 may turn on electronic units sequentially from the first row to the Mth row. Specifically, the scan lines of the first to Mth rows sequentially transfer the scan voltage to the coupled electronic units and turn on the corresponding switch unit. At this time, the electronic units transmit data voltage through their respective combined data lines. The data voltage may be stored in the capacitor of the driving unit to complete the step of storing the data voltage. In some embodiments, electronic units corresponding to the same row (e.g., electronic units 100(1, 1) to 100(1, N)) are coupled to scan line SN1, and electronic units ( 100(2,1) to 100(2,N)) are coupled to scan line SN2. Accordingly, electronic units 100(M, 1) to 100(M, N) are coupled to the scan line SNM. Moreover, in some embodiments, the electronic units 100(1, 1) to 100(1, N) are coupled to the emission control line EM1, and the electronic units 100(2, 1) to 100(2) are coupled to the emission control line EM1. , N)) is coupled to the emission control line (EM2), etc. Accordingly, the electronic units 100(M, 1) to 100(M, N) are coupled to the emission control line (EMM), but are not limited thereto. In some embodiments, the emission control line EM1 to EMM can control corresponding electronic units, and the emission control line EM1 to EMM are each coupled to different control terminals. . The control terminal may include, but is not limited to, a Gate on Panel (GOP) or an integrated circuit (IC). In some embodiments, electronic units in the same row (such as electronic units 100(1, 1) to 100(M, 1)) are coupled to data line D1, and electronic units 100(1) , 1) to 100(M, 2)) are coupled to the data line D2, etc. The electronic units 100(1, N) to 100(M, N) are coupled to the data line DN, but are not limited thereto. After the data voltages of the electronic units 100(1, 1) to 100(1, N) are stored, the electronic device 10 stores the electronic units 100(2, 1) to 100(2, N). It may, but is not limited to, start storing data voltage, etc. The manner of coupling scan lines, data lines or emission control lines to electronic units in different columns or different rows is only an example and may vary depending on the application. For example, the emission control line may be coupled to electronic units coupled to the same column, and the extension direction of the emission control line may be parallel to the extension direction of the data line.

Figure 3 shows the operation sequence of the electronic units 100(1, 1) to 100(M, 1) of the electronic device 10. In Figure 3, the electronic units 100(1, 1) to 100(M, 1) perform a storage step of the data voltage in a time period (TP1) to a time period (TPM). In the frame period TF1, the driving unit 120 of the electronic unit 100(1, 1) is supplied with the corresponding data voltage in the time period TP1 and completes data storage. In the subsequent plurality of driving periods (e.g., driving periods of TSA1 to TSAK), a corresponding current will be generated according to the data voltage to drive the LED 110 of the electronic unit 100(1, 1). can be, where K is an integer greater than 1. In the frame period TF1, the driving unit 120 may drive the LED 110 K times. That is, the LED 110 can emit light K times. According to the above method, because the number of light emissions by the LED 110 increases, it is difficult for the human eye to perceive the flicker. In FIG. 3, in the frame period TF2 of the electronic unit 100 (2, 1), the driving unit 120 receives the corresponding data voltage in the period TP2 and completes storage of the data voltage. In the subsequent plurality of driving periods (TSB1 to TSBK), corresponding currents may be respectively generated according to the voltage data to drive the LED 110 of the electronic unit 100 (2, 1). Electronic unit 100(M, 1) may operate in a similar manner. In FIG. 3, the frame period TF1 and the frame period TF2 (and/or the frame period TFM) correspond to the same picture frame, and a plurality of driving periods in the frame period TF1 ( The start time of each of TSA1 to TSAK) may be different from that in the frame period TF2. That is, the light emission start time for the LEDs 110 in the electronic units in the first row is different from the light emission start time for the LEDs 110 in the second row. In the above-described manner, the electronic units in the first row and the electronic units in the second row (or the electronic units in other rows) can simultaneously flow current through the combined LEDs. It can reduce the current flowing simultaneously through LEDs coupled to electronic units in the same column (and different rows) at the same start time, thereby reducing current loading. It should be noted that in the embodiment of Figure 3, electronic units in adjacent rows emit light at generally, but not limited to, different starting times. In some embodiments, the start time of drive period TSA1 in frame period TF1 is the first of a plurality of drive periods in frame periods TFM through TF2 (e.g., of drive period TSB1). Please note that the start time may be different. The start time of the drive period TSAK in the frame period TF1 may be the same as, but is not limited to, one of the start times of the drive periods TSB1 to TSBK in the frame period TF2.

According to the driving method shown in FIG. 3, the sum of the time intervals of the driving periods (TSA1 to TSAK) may be smaller than the time interval of the frame period (TF1). In some embodiments, the ratio of the sum of the time intervals of the driving periods (TSA1 to TSAK) and the time interval of the frame period (TF1) may be 1/8 or less, but is not limited thereto. In this case, in order to make the LED 110 emit light with the same brightness, the driving unit 120 will generate a larger current to drive the LED 110, and the current may be increased by 8 times, but It is not limited. For example, in a conventional electronic device, LED 110 may be driven continuously with a current of 50 microamps (μA) during one frame period. The above-mentioned “continuous” means that the LED 110 can be turned on continuously during one frame period. This means that the duty ratio is 1. For a detailed definition of duty ratio, please refer to the following explanation. In an embodiment of the present invention, the ratio of the sum of the time intervals of the driving periods (TSA1 to TSAK) and the time interval of the frame period (TF1) is designed to be 1/8 (that is, the duty ratio is 1/8). Drive device 120 then generates a current of approximately 400 μA (0.4 mA = 50 μA x 8 = 400 μA) to drive LED 110. Since the LED 110 of the above design is driven by a relatively large current, the problem of color shift of the LED 110 depending on the amount of current can be reduced, thereby improving the quality of the electronic device 10. Furthermore, depending on the characteristics of the LED 110, if the driving current increases from the microampere level to the milliampere level, the luminous efficiency of the LED 110 may increase. Accordingly, in the above embodiment, the driving unit 120 may generate a current of 400 μA or less to drive the LED 110 to emit light of corresponding brightness, but is not limited thereto. By reducing the time interval of the light emission time of the LED 110 in the frame period, the problem of color shift due to various driving currents can be reduced. Additionally, as the driving current increases, the luminous efficiency of the LED 110 can be increased, thereby reducing power loss of the electronic device.

In addition, because the LEDs 110 emitting different colors of light have different luminous efficiency characteristics or different color shifting characteristics, the LEDs 110 emitting different colors of light emit different amounts of current as needed. It can be driven. The drive unit 120 may have different numbers of transistors corresponding to different colors. The color shift characteristic described above may be a chromaticity shift caused by a change in the amount of current flowing through the LED. In one embodiment, the number of transistors in the red light LED driving unit 120 is greater than the number of transistors in the green light LED driving unit 120. In some embodiments, the number of transistors that emit green light in the LED drive unit 120 is greater than the number of transistors that emit blue light in the LED drive unit 120. Furthermore, the amount of current can be adjusted by controlling the time interval of the driving period in the above-described frame period. When the driving period is longer than the time interval, the accumulated current may be larger, but is not limited to this. Therefore, in some embodiments, the sum of time intervals of driving cycles of electronic units with different colors of light in one frame period may be different, but is not limited to this. For example, LED 110 in electronic unit 100(1, 1) may emit blue or green light, and LED 110 in electronic unit 100(2,1) may emit red light. can do. Since an LED emitting red light may be suitable for being driven with a small current, the sum of the time intervals of the drive periods (TSB1 to TSBK) in the frame period (TF2) is the sum of the time intervals of the drive periods (TSA1) in the drive period (TF1). to TSAK), but is not limited to this. In some embodiments, the sum of the time intervals of the drive periods (TSA1 to TSAK) in the frame period TF1 is the same as or different from the time interval of the drive periods (TSB1 to TSBK) in the frame period TF2.

Furthermore, because the correlation curves of luminous efficiency for LEDs emitting blue light and/or green light may be similar, in some embodiments, the time interval of the driving period of the electronic unit emitting blue light and/or green light may be similar. The sum may be less than or equal to the sum of the time intervals of the driving periods of the electronic units emitting red light, but is not limited thereto. According to another embodiment, the sum of the time intervals of the driving cycles of the light LEDs emitting red light may or may not be equal to the sum of the time intervals of the driving cycles of the LEDs emitting blue light (and/or the LEDs emitting green light). there is. According to another embodiment, the sum of the time intervals of the driving cycles of the LEDs that emit red light, blue light, and/or green light may be different from each other.

In FIG. 3, the driving periods (TSA1 to TSAK) in the frame period (TF1) may have substantially the same time interval. The time interval between two adjacent drive periods in the drive periods (TSA1 to TSAK) may be the same as, but is not limited to, the time interval between another two adjacent drive periods. In another embodiment, the time interval between two adjacent drive periods in the drive periods (TSA1 to TSAK) in the frame period TF1 is different from the time interval between another two adjacent drive periods. The time intervals described above may exclude a period of time (TP), which may be defined as a period of time during which no current passes through the LED 110. In another embodiment, at least two of the drive periods (TSA1 to TSAK) in frame period TF1 may have different time intervals, and the two different time intervals are two adjacent drive periods or two non-adjacent drive periods. It may be a dog drive period. It should be noted that although three driving periods (TSA1, TSA2 and TSAK) are shown in the frame period TF1, the embodiment is not limited thereto. In some embodiments, frame period TF1 may have two drive periods (i.e., K is 2) for the same reason, and the number of drive periods in frame period TF2 or other frame periods is as shown in the figure. is not limited to Although electronic unit 100(1, 1) in the figure shows a driving period of one frame period TF1, after completing processing in frame period TF1, electronic unit 100(1, 1) ) may perform processing in another frame period (TF1), etc. Since the electronic units 100(2, 1) to 100(M, 1) are similar, they will not be described repeatedly.

Figure 4 shows another operation sequence of the electronic units 100(1, 1) to 100(M, 1) of the electronic device 10. In FIG. 4 , the time intervals of the driving periods TSA1', TSA2', and TSAK' in the frame period TF1' may be different in the electronic unit 100(1, 1). Likewise, the time interval of the driving periods TSB1', TSB2' and TSBK' in the frame period TF2' is different in the electronic unit 100(2,1), etc. In the electronic unit 100 (M, 1), the time intervals of the plurality of driving periods in the frame period TFM' are different, but are not limited to this. In some embodiments, a time interval of driving periods in a frame period of electronic units in at least one row may be the same as a time interval of driving periods in a frame period of electronic units corresponding to another row. In some embodiments, a time interval of driving periods in a frame period of electronic units corresponding to at least one row may be different from a time interval of driving periods in a frame period of electronic units corresponding to another row. Electronic units located in different rows may have different drive modes depending on requirements, such as, but not limited to, the time interval of each drive period in one frame period and/or the number of drive periods in a frame period. no. For example, in the frame period TF1' of the electronic unit 100 (1, 1) corresponding to the first row, the driving periods TSA1', TSA2' and TSAK' may have different time intervals from each other, but In the frame period TF2' of the electronic unit 100(2,1) corresponding to row 2, the driving periods TSB1', TSB2', and TSBK' may have the same time interval.

Figure 5 shows another operation sequence of the electronic units 100(1, 1) to 100(M, 1) of the electronic device 10. In Figure 5, the time interval between the drive period (TSA1") and the drive period (TSA2") in the frame period (TF1") of the electronic unit 100 (1, 1) is the drive period (TSA2") and the drive period ( TSA3"). Similarly, the time interval between the drive period TSB1" and the drive period TSB2" in the frame period TF2" of the electronic unit 100 (2,1) is different from the time interval between the drive period TSB2". The time interval between the period (TSB2") and the driving period (TSB3") is different. In the frame period (TFM") of the electronic unit 100 (M, 1), the time interval between two adjacent drive periods is different from, but is not limited to, the time interval of another two adjacent drive periods. Some In an embodiment, the time interval between the drive period TSA1" and the drive period TSA2" in the frame period TF1" of the electronic units 100(1, 1) of the first row is the drive period TSA2 ") and the time interval between the driving period (TSA3") is different. However, the time interval between the drive period TSB1" and the drive period TSB2" in the frame period TF2" of the electronic unit 100(2,1) in the second row is the drive period TSB2" and It may be equal to the time interval between driving periods (TSB3").

The electronic device 10 can adjust the amount of current by adjusting the sum of time intervals of the driving period in one frame period. In this way, the LEDs in the electronic unit can emit light with corresponding brightness. Here, the ratio of the sum of the time intervals of the driving period in one frame period and the time interval of the frame period can be defined as the duty ratio. In some embodiments, the duty ratio of the electronic unit may be designed to be less than 1. In some embodiments, the duty ratio of the electronic unit may be designed to be 1/2 or less. In some embodiments, the duty ratio of the electronic unit may be designed to be 1/4 or less. In some embodiments, the duty ratio of the electronic unit may be designed to be 1/8 or less. In some embodiments, the duty ratio of the electronic unit may be designed to be 1/16 or less.

FIG. 6 is a diagram of an electronic device 20 according to another embodiment. Electronic device 20 and electronic device 10 may have similar circuit configurations. Electronic device 20 may include a plurality of electronic units 200(1, 1) to 200(M, N), where M and N are positive integers. In some embodiments, the electronic units 200(1, 1) to 200(M, N) may be arranged in an array. In Figure 6, electronic units 200(1, 1) to 200(1, N) can be placed in the same row, while electronic units 200(1, 1) to 200(M, 1) ) can be placed in the same column. The electronic device 20 may sequentially turn on electronic units corresponding to different rows. For example, the electronic device 20 may sequentially turn on electronic units corresponding to the first to Mth rows, similar to the electronic device 10. Therefore, the explanation will not be repeated here.

The difference between the electronic device 20 of FIG. 6 and the electronic device 10 of FIG. 1 is that the emission control line EM1 to EMM in the electronic device 20 are coupled to the same control terminal. The control terminal may include a gate on panel (GOP) or an integrated circuit (IC). In some embodiments, the emission control lines EM1 to EMM of the electronic device 10 of FIG. 1 are not coupled to each other, and the emission control lines are coupled to different control terminals, but the present invention is not limited thereto. In some embodiments, some of the emission control lines (such as emission control line EM1 through EMM) are coupled and other portions are coupled. The emission control line is therefore separated into different parts (at least two parts). Different portions of the luminescence control line may be coupled to different control terminals.

In some embodiments, the control terminal is disposed on a circuit board. The circuit board is coupled to a substrate, and electronic units, scan lines, data lines or other components as described above are disposed on the substrate, but are not limited thereto. The circuit board may be, but is not limited to, a flexible circuit board or a printed circuit board. In some embodiments, the control terminals, electronic units, scan lines, data lines or other components are disposed on the same substrate, and the control terminals may include a GOP. The substrate material may include glass, quartz, organic polymer, or metal. Organic polymers may include, but are not limited to, polyimide (PI), polyethylene terephthalate (PET), and polycarbonate (PC). The substrate may be an array or a chip on film (COF).

In some embodiments, electronic units 200(1, 1) through 200(M, N) may have similar circuit configurations, but are not limited thereto. The circuit configuration may be similar to the electronic unit 100(1, 1) of FIG. 2 or similar to the electronic unit 200(1, 1) of FIG. 7, but is not limited thereto. Electronic unit 200(1, 1) of Figure 7 will be described in detail in subsequent paragraphs.

The aforementioned electronic units 200(1, 1) to 200(M, N) have similar circuit configurations, meaning that the number of switch units, drive units, LEDs or other components in the electronic units are the same. means. However, the size (or stacking configuration) of the switch units, drive units, LEDs or other components need not be the same. Although the circuit diagram of the electronic unit 100(1, 1) in FIG. 2 or the electronic unit 200(1, 1) in FIG. 7 is only a simple example of the basic required components or circuits, the present invention In other embodiments, the circuit configuration of the electronic units may include added components such as other transistors or other components among the existing components of the electronic units in the embodiment. It can be coupled to any one terminal.

In some embodiments, the circuit configuration or stacking configuration of the electronic units 100(1, 1) to 100(M, N) in FIG. 1 may or may not be similar. For example, electronic units 100(1, 1) to 100(M, N) may emit light in different colors (including red, blue, green, or other colors). Accordingly, the materials or stacking configurations of some layers or elements of the electronic units may be different. For example, the LED chips or light-emitting materials used in different electronic units may be different. Similarly, the circuit configuration or stacking structure of the electronic units 200(1, 1) to 200(M, N) may or may not be similar. The description will not be repeated here.

7 is a circuit diagram of the electronic unit 200(1, 1) of the electronic device 20. In FIG. 7 , the electronic unit 200(1, 1) may include an LED 210, a driving unit 220, and a switch unit 230. The driving unit 220 may be combined with the LED 210, and the switch unit 230 may be combined with the driving unit 220. In one frame period, electronic unit 200(1, 1) performs the steps of storing data voltages. For example, when the switch unit 230 of the electronic unit 200 (1, 1) is turned on, the driving unit 220 transmits the data voltage transmitted by the data line D1 through the switch unit 230. Receive. The data voltage may be stored in the capacitor C1B of the driving unit 220. Subsequently, the driving unit 220 generates a corresponding amount of current according to the data voltage to drive the LED 210, so that the LED 210 emits light with corresponding brightness.

The difference between Fig. 7 and Fig. 2 is that the drive unit 220 does not include transistor M3A (control transistor). Specifically, the switch unit 230 of the electronic unit 200(1, 1) of FIG. 7 may include a transistor M1B (switch transistor). The driving unit 220 may include a transistor M2B (driving transistor) and a capacitor C1B. One terminal of the capacitor C1B is coupled to the emission control line EM1. The transistor M1B is coupled to the scan line SN1 and the data line D1. During the storage phase of the data voltage, a scan voltage is delivered through the scan line SN1 to turn on the transistor M1B. At this time, the data line (D1) transfers the data voltage to the capacitor (C1B), the data voltage can be stored in the subsequent driving period, and the transistor (M2B) generates a corresponding amount of current according to the data voltage to control the LED 210. can be driven. Since one terminal of the capacitor C1B is coupled to the emission control line EM1, it can be determined whether the transistor M2B is turned on. The transistor M2B is turned on during a drive period and turned off for another time equal to the time interval between two adjacent drive periods, thereby controlling the sum or duty ratio of the time intervals of the drive periods. It should be noted that the circuit diagram of electronic unit 200 (1, 1) in FIG. 7 is exemplary only and that electronic unit 200 (1, 1) may include other transistors, capacitors or other suitable components. do.

Figure 8 shows the operation sequence of the electronic units 200(1, 1) to 200(M, 1) of the electronic device 20. In Figure 8, the electronic units 200(1, 1) to 200(M, 1) in the first row perform data storage in the time period TP1 to TPM respectively. After the electronic unit 200(1, 1) acquires the data voltage in the time period TP1 in the frame period TF1 of the electronic unit 200(1, 1), the data voltage is acquired in the subsequent drive period TSA. Current is generated to drive the LED 210 according to the voltage. Likewise, the electronic unit 200(2,1) drives the LED 210 in the drive period TSB after the storage phase of the data voltage in period TP2 of the frame period TF2 is completed. The frame period TF1 and the frame period TF2 correspond to the same image frame, and the time interval of the frame period TF1 is substantially the same as the time interval of the frame period TF2. In FIG. 8, the start time of the drive period (TSB) in the frame period (TF2) is substantially the same as the start time of the drive period (TSA) in the frame period (TF1). Accordingly, the start time of the drive period (TSM) in the frame period (TFM) is substantially the same as the start time of the drive period (TSA) in the frame period (TF1). In another embodiment, the end time of the drive period (TSA) and the end time of the drive period (TSB) may be substantially the same, but are not limited to this. In some embodiments, the start time of the drive period (TSM) in the frame period (TFM) is substantially the same as the start time of the drive period (TSA) in the frame period (TF1), but is equal to the end time of the drive period (TSA). The end time of the drive period (TSB) may be different. In FIG. 8, although the electronic units 200(1, 1) to 200(M, 1) each perform data storage in different periods (TP1 to TPM), the electronic units 200(1, 1) to 200(M, 1) perform data storage in different periods (TP1 to TPM). 200(M, 1)) can drive LEDs 210 to emit light at the same start time. In this case, since the start time of the driving period of the electronic units arranged in different rows is the same, the LEDs in the electronic units can emit light simultaneously (simultaneously). The above-mentioned “simultaneously” may be defined as a time difference of less than about 10 μS, but is not limited thereto. Additionally, “simultaneously” can be explained using other embodiments. Electronic units in the same row are coupled to the same voltage signal line. For example, electronic units 200(1, 1) to 200(M, 1) of FIG. 6 are coupled to voltage signal line VDD1. When the voltage signal line VDD1 transmits voltage, it can be simultaneously received by the electronic units 200(1, 1) to 200(M, 1).

In Figure 8, since the driving period (including start time and/or end time) in the frame period of the electronic units corresponding to different rows is the same, two of such designs (e.g. 200(1.1)) The time interval between adjacent drive periods may be larger than the time gap between two adjacent drive periods for the embodiment of FIG. 3 . In some embodiments, the frame rate of the electronic unit may be increased above 60 Hz to reduce flickering. In some embodiments, the frame rate may be, but is not limited to, 120 Hz or higher.

As shown in FIG. 8, the time interval of the driving period TSA in the frame period TF1 is smaller than the time interval of the frame period TF1. The time interval of the driving period (TSB) in the frame period (TF2) is smaller than the time interval of the frame period (TF2). By the above-described design, the amount of driving current of the LED 210 can be increased to reduce color shift, increase luminous efficiency, and reduce power loss.

Figure 9 shows another operation sequence of the electronic units 200(1, 1) to 200(M, 1) of the electronic device 20. In FIG. 9, two drive periods, a drive period (TSA1') and a drive period (TSA2'), may be included in the frame period (TF1'). The drive period (TSB1') and the drive period (TSB2') may be included in the frame period (TF2'), etc. Two driving periods may also be included in the frame period (TFM'). For example, a drive period (TSM1') and a drive period (TSM2') may be included, but are not limited thereto. As shown in FIG. 9, the drive period TSA1', drive period TSB1', and drive period TSM1' have substantially the same start time, but the drive period TSA1', drive period TSB1' and The drive period TSM1' usually has a different end time. Drive period TSA2', Drive period TSB2', and Drive period TSM2' have the same start time, but Drive period TSA1', Drive period TSB1', and Drive period TSM2' have the same end time. time, but is not limited to this.

To observe whether the driving method of the electronic device is similar to the provided embodiment, the user can use the display panel to display the image, the time interval of the driving period, the number of driving periods in one frame period, two adjacent Photo sensors corresponding to the electronic units can be used to obtain the time interval between driving periods, duty ratio, etc. A driving method between electronic units of different rows can be obtained in this way.

Those skilled in the art will readily appreciate that many modifications and variations of the apparatus and method may be made while retaining the teachings of the present invention. Accordingly, the invention should be construed as being limited only by the boundaries and limits of the appended claims.

Claims (22)

As an electronic device,
Comprising a first electronic unit,
The first electronic unit is,
first light emitting diode; and
A first driving unit coupled to the first light emitting diode and supplied with a first data voltage,
The first electronic unit is operated in a plurality of driving periods following the first frame period TF1, and the first driving unit operates the first light emitting diode according to the first data voltage in the plurality of driving periods. drive,
The electronic device further includes a second electronic unit disposed in a row adjacent to the first electronic unit, the second electronic unit comprising:
second light emitting diode; and
It includes a second driving unit coupled to the second light emitting diode and supplied with a second data voltage,
The second electronic unit is operated in a plurality of driving periods following the second frame period TF2, and the second driving unit operates the second light emitting diode according to the second data voltage in the plurality of driving periods. drive,
A first driving period in time sequence in the subsequent plurality of driving periods (TSA1 to TSAK) of the first frame period (TF1) and the subsequent plurality of driving periods (TSB1 to TSBK) of the second frame period (TF2) ), wherein the first driving period in the time sequence does not overlap. According to paragraph 1,
The electronic device, characterized in that the plurality of driving periods in the first frame period have the same time interval. According to paragraph 1,
At least two driving periods among the plurality of driving periods in the first frame period have different time intervals. According to paragraph 1,
The electronic device, wherein a time interval between two adjacent driving periods of the plurality of driving periods in the first frame period is equal to a time interval between another two adjacent driving periods of the plurality of driving periods. According to paragraph 1,
The electronic device, wherein a time interval between two adjacent driving periods of the plurality of driving periods in the first frame period is different from a time interval between another two adjacent driving periods of the plurality of driving periods. delete According to paragraph 1,
The electronic device, characterized in that the sum of the time intervals of the plurality of driving periods in the first frame period is different from the sum of the time intervals of the plurality of driving periods in the second frame period. According to paragraph 1,
The electronic device, characterized in that the sum of time intervals of a plurality of driving periods in the first frame period is smaller than the time interval of the first frame period. According to clause 8,
The electronic device, characterized in that the ratio of the sum of the time intervals of the plurality of driving periods in the first frame period and the time interval of the first frame period is 1/2 or less. According to paragraph 1,
further comprising another electronic unit, the other electronic unit comprising: another light emitting diode and another driving unit;
The other driving unit is coupled to the other light emitting diode and is supplied with a different data voltage, and the other driving unit drives the other light emitting diode according to the different data voltage,
The electronic device, characterized in that the number of transistors of the first driving unit is different from the number of transistors of the other driving units. According to clause 10,
The first light emitting diode emits a first color, the other light emitting diode emits a second color, and the first color and the second color are different. According to paragraph 1,
The electronic device further comprises an emission control line coupled to the first light emitting diode, wherein the emission control line is coupled to a control terminal. According to clause 12,
An electronic device, wherein the control terminal includes a gate on panel or an integrated circuit. As an electronic device,
first electronic unit; And a second electronic unit;
The first electronic unit is,
first light emitting diode; and
It includes a first driving unit coupled to the first light emitting diode and supplied with a first data voltage.
The second electronic unit is,
second light emitting diode;
It includes a second driving unit coupled to the second light emitting diode and supplied with a second data voltage,
The first electronic unit is operated in at least one driving period in the first frame period, and the first driving unit is configured to operate the first electronic unit according to the first data voltage in at least one driving period in the first frame period. driving a light emitting diode,
The second electronic unit is operated in at least one driving period in the second frame period, and the second driving unit is configured to operate the second electronic unit according to the second data voltage in at least one driving period in the second frame period. driving a light emitting diode,
The start time of the first driving unit supplied with the first data voltage is different from the start time of the second driving unit supplied with the second data voltage, and at least one driving period in the first frame period The electronic device, characterized in that the start time is equal to the start time of at least one driving period in the second frame period. According to clause 14,
The first frame period and the second frame period correspond to the same image frame, the sum of the time intervals of at least one driving period in the first frame period is less than the time interval of the first frame, and the second frame period is smaller than the time interval of the first frame. The electronic device, characterized in that the sum of at least one time interval of at least one driving period in a frame period is less than the time interval of the second frame period. According to clause 14,
characterized in that the sum of at least one time interval of the at least one driving period in the first frame period is different from the sum of at least one time interval of the at least one driving period in the second frame. Device. According to clause 16,
The electronic device, wherein the ratio of the sum of at least one time interval of at least one driving period in the first frame period and the time interval of the frame period is 1/2 or less. According to clause 14,
The electronic device, characterized in that the number of transistors of the first driving unit is different from the number of transistors of the second driving unit. According to clause 18,
The first light emitting diode emits a first color, the second light emitting diode emits a second color, and the first color and the second color are different. According to clause 14,
The electronic device further includes a light emission control line coupled to the first light emitting diode, wherein the light emission control line is coupled to a first control terminal. According to clause 20,
An electronic device, wherein the control terminal includes a gate on panel or an integrated circuit. According to clause 20,
The electronic device further comprises a light emission control line coupled to the second light emitting diode, and the light emission control line coupled to the second light emitting diode is coupled to a second control terminal different from the first control terminal. .