KR20190122154A - Electronic device capable of reducing color shift or increasing luminous efficacy - Google Patents

Abstract

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

Description

ELECTRONIC DEVICE CAPABLE OF REDUCING COLOR SHIFT OR INCREASING LUMINOUS EFFICACY}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic devices, and more particularly to electronic devices capable of reducing color shift or increasing luminous efficacy.

In the prior art, an active matrix light-emitting diode display can drive a light emitting diode (LED) by regulating the current so that the LED emits light with different brightness. (emit). However, the light emitted by the LED is easy to color shift with the change of current, which seriously affects the image quality. Accordingly, the present invention proposes an electronic device capable of reducing color shift or increasing luminous efficiency.

In addition, an embodiment includes an electronic device including a light emitting diode (LED) and an electronic unit including a driving unit coupled to the light emitting diode to receive 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 figures and the embodiments shown in the figures.

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.
3 illustrates an operation sequence of a first column of electronic units of the electronic device of FIG. 1.
FIG. 4 illustrates another operation sequence of a first column of electronic units of the electronic device of FIG. 1.
FIG. 5 illustrates another operational sequence of a first column of electronic units of the electronic device of FIG. 1.
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.
8 illustrates an operation sequence of a first column of electronic units of the electronic device of FIG. 6.
FIG. 9 illustrates another operation sequence of a first column of electronic units of the electronic device of FIG. 6.

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

As used herein, the terms "generally" and "roughly" refer to 20%, 10% or 5% of a given value or range. The amounts given herein are approximate quantities, meaning "almost" and "approximately" which may be implied without specific explanation.

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, 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 placed in the same column. The first positive number in parentheses shown corresponds to the row and the second positive number in parentheses corresponds to the column.

2 is a circuit diagram of an electronic unit 100 (1, 1) according to an 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 coupled, they may comprise two elements which are electrically connected directly or connected to one another via another element. In one frame period of the electronic unit 100 (1, 1), storage of the data voltage 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 a data voltage delivered 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. The LED 110 can then 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, but is not limited to, quantum dot (QD) materials, fluorescent materials, phosphor materials, or other suitable light converting materials. It is not limited. The 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 FIG. 2, the switch unit 130 may include a transistor M1A (eg, a switching transistor). The driving unit 120 may include, but is not limited to, a transistor M2A (eg, a driving transistor), a capacitor C1A, and a transistor M3A (eg, a control transistor). Transistor M1A is coupled to scan line SN1 and data line D1. When the data voltage is stored, a scan voltage is transferred through the scan line SN1 to turn on the transistor M1A, so that the capacitor C1A stores the data voltage delivered by the data line D1. Can be. The process of "storing the data voltage" allows the transistor M2A to generate a current in accordance with the data voltage in a subsequent drive period, and the transistor M2A controls the brightness or the brightness emitted by the amount of current flowing through the LED. I can drive it. In some embodiments, the transistor M3A may be coupled to the emission control line EM1 to control the turn on or turn off of the transistor M3A by supplying a control voltage delivered by the emission control line EM1. . The emission control line EM1 supplies a control voltage to turn on the transistor M3A in the driving period, and the emission control line EM1 transmits the transistor in another period (for example, an interval other than the driving period). The 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. The drive unit 120 of the present invention only shows transistor M2A, capacitor C1A and transistor M3A, but in other embodiments, drive unit 120 may include other transistors, capacitors or other circuit components. have. For example, the driving unit 120 may include a compensation transistor and a reset transistor, but is not limited thereto. In some embodiments, electronic unit 100 (1, 1) may include a plurality of LEDs 110. Although the transistors of the present invention show only three-terminal transistors (gate terminals, drain terminals, and source terminals), in other embodiments some transistors are four-terminal transistors (two gate terminals). , A drain terminal and a source terminal).

In the embodiment of FIG. 1, the electronic device 10 may sequentially turn on the electronic units from the first row to the M-th row. Specifically, the scan lines of the first to Mth rows sequentially transfer the scan voltage to the combined electronic units and turn on the corresponding switch unit. At this time, the electronic units each transmit a data voltage through the coupled data line. The data voltage may be stored in the capacitor of the drive unit to complete the step of storing the data voltage. In some embodiments, electronic units corresponding to the same row (eg, electronic units 100 (1, 1) to 100 (1, N)) are coupled to scan line SN1, and the electronic units ( 100 (2, 1) to 100 (2, N) are coupled to scan line SN2. Thus, the electronic units 100 (M, 1) to 100 (M, N) are coupled to the scan line SNM. In addition, 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). , N)) is coupled to the emission control line EM2 and the like. Therefore, 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 through the emission control line EMM can control corresponding electronic units, and the emission control line EM1 through the emission control line EMM are respectively coupled to different control terminals. . The control terminal may include a gate on panel (GOP) or an integrated circuit (IC), but is not limited thereto. In some embodiments, electronic units in the same column (such as electronic units 100 (1, 1) through 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 and the like. 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). The storage of the data voltage may be started on, for example, but not limited to. The manner in which the scan line, data line or light emission control line is coupled to the electronic units in different columns or different rows is just one example, which may vary depending on the application. For example, the emission control line may be coupled to electronic units coupled to the same column, and an extension direction of the emission control line may be parallel to an extension direction of the data line.

3 illustrates an operation sequence of the electronic units 100 (1, 1) to 100 (M, 1) of the electronic device 10. In FIG. 3, the electronic units 100 (1, 1) to 100 (M, 1) perform a storing 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 a corresponding data voltage in the time period TP1 and completes data storage. In the subsequent plurality of driving periods (eg, driving periods of TSA1 to TSAK), a corresponding current is generated in accordance with the data voltage to drive the LED 110 of the electronic unit 100 (1, 1). Where K is an integer of 1 or greater. In the frame period TF1, the driving unit 120 may drive the LED 110 K times. That is, the LED 110 may emit light K times. According to the method, since the number of light emission by the LED 110 increases, it is difficult for the human eye to recognize the flicker. In FIG. 3, in the frame period TF2 of the electronic unit 100 (2, 1), the driving unit 120 is supplied with a corresponding data voltage in the period TP2 and completes storing 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 LEDs 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 the plurality of driving periods in the frame period TF1 ( Each start time of TSA1 to TSAK may be different from that in frame period TF2. That is, the light emission start time for the LEDs 110 in the first row of electronic units is different from the light emission start time for the LEDs 110 in the second row. In the manner described above, the electronic units in the first row and the electronic units in the second row (or the electronic units in the other row) can flow current through the combined LEDs collectively. It can reduce the current flowing simultaneously through the LEDs coupled to the electronics in the same column (and other rows) at the same start time, thereby reducing the current loading. In the embodiment of FIG. 3, it should be noted that electronic units in adjacent rows generally emit light at different start times, but are not limited thereto. In some embodiments, the start time of the driving period TSA1 in the frame period TF1 is equal to the first of the plurality of driving periods in the frame periods TFM to TF2 (eg, the driving period TSB1). It may be different from the start time). The start time of the drive period TSAK in the frame period TF1 may be equal to one of the start times of the drive periods TSB1 to TSBK in the frame period TF2, but is not limited thereto.

According to the driving method illustrated 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 for the LED 110 to emit light with the same brightness, the drive unit 120 will generate a larger current to drive the LED 110, and the current may be increased by eight times, but It is not limited. For example, in a conventional electronic device, the LED 110 may be continuously driven at a current of 50 microamps (μA) for one frame period. The term " continuous " described above means that the LED 110 can be turned on continuously for one frame period. This means that the duty ratio is one. For a detailed definition of the duty ratio, please refer to the following description. 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 (ie, the duty ratio is 1/8). The drive unit 120 then generates a current of approximately 400 μA (0.4 mA = 50 μA x 8 = 400 μA) to drive the LED 110. Since the LED 110 of the design is driven by a relatively large current, the problem of the color shift of the LED 110 according to the amount of current can be reduced, thereby improving the quality of the electronic device 10. Moreover, depending on the characteristics of the LED 110, when the driving current increases from the microamperage level to the milliampere level, the luminous efficiency of the LED 110 can be increased. Therefore, 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 a corresponding brightness, but is not limited thereto. By reducing the time interval of the light emitting time of the LED 110 in the frame period, the problem of color shift due to various driving currents can be reduced. In addition, as the driving current increases, the luminous efficiency of the LED 110 may be increased, thereby reducing power loss of the electronic device.

In addition, since the LEDs 110 that emit light of different colors have different luminous efficiency characteristics or different color shifting characteristics, the LEDs of different colors of light may be produced with different amounts of current as needed. 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 drive unit 120 is greater than the number of transistors in the green light LED drive unit 120. In some embodiments, the number of transistors emitting green light in the LED drive unit 120 is greater than the number of transistors emitting blue light in the LED drive unit 120. In addition, 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 cumulative current may be larger, but is not limited thereto. Therefore, in some embodiments, the sum of the time intervals of the drive periods of the electronic units having different colored light in one frame period may be different, but is not limited thereto. For example, the LED 110 in the electronic unit 100 (1, 1) may emit blue light or green light, and the LED 110 in the electronic unit 100 (2, 1) emit red light. can do. Since the LED emitting red light may be suitable to be driven with a small current, the sum of the time intervals of the driving periods TSB1 to TSBK in the frame period TF2 is the driving periods TSA1 in the driving period TF1. To TSAK), but not limited to the sum of the time intervals. In some embodiments, the sum of the time intervals of the driving periods TSA1 to TSAK in the frame period TF1 is the same as or different from the time interval of the driving periods TSB1 to TSBK in the frame period TF2.

In addition, since the correlation curves of luminous efficiency for LEDs emitting blue and / or green light may be similar, in some embodiments, the time interval of the driving period of the electronic unit emitting blue and green light 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 drive cycles of the light LEDs emitting red light may or may not be equal to the sum of the time intervals of the drive cycles of the LEDs emitting blue light (and / or the LEDs emitting green light). have. According to another embodiment, the sum of the time intervals of the driving periods of the LEDs emitting the red light, blue light and / or green light LEDs 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 driving periods in the driving periods TSA1 to TSAK may be the same as, but not limited to, the time interval between another two adjacent driving 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 two adjacent drive periods. The above-described time interval may exclude a period TP, which may be defined as a time period during which no current passes through the LED 110. In another embodiment, at least two of the driving periods TSA1 to TSAK in the frame period TF1 may have different time intervals, and two different time intervals may be two adjacent driving periods or two non-adjacent driving periods. Drive periods. Although three driving periods TSA1, TSA2 and TSAK are shown in the frame period TF1, it should be noted that the embodiment is not limited thereto. In some embodiments, frame period TF1 may have two driving periods (ie, K is 2) for the same reason, and the number of driving periods in frame period TF2 or other frame periods is shown in the figure shown. It is not limited to. Although the electronic unit 100 (1, 1) in the figure shows the driving period of one frame period TF1, after completing the processing in the frame period TF1, the electronic unit 100 (1, 1) It is to be noted that) may perform processing in another frame period TF1 or the like. The electronic units 100 (2, 1) to 100 (M, 1) are similar and will not be described again.

4 illustrates 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). Similarly, the time intervals of the driving periods TSB1 ', TSB2', and TSBK 'in the frame period TF2' are different in the electronic unit 100 (2,1) or the like. In the electronic unit 100 (M, 1), the time intervals of the plurality of driving periods in the frame period TFM 'are different, but not limited thereto. In some embodiments, the time interval of the driving period in the frame period of the electronic units of at least one row may be the same as the time interval of the driving period in the frame period of the electronic units corresponding to the other row. In some embodiments, the time interval of the driving period in the frame period of the electronic units corresponding to the at least one row may be different from the time interval of the driving period in the frame period of the electronic units corresponding to the other row. Electronic units located in different rows may have different driving modes depending on requirements, such as the time interval of each driving period in one frame period and / or the number of driving periods in the frame period, but is not limited thereto. 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. In the frame period TF2 'of the electronic unit 100 (2,1) corresponding to the two rows, the driving periods TSB1', TSB2 ', and TSBK' may have the same time interval.

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

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

6 is a diagram of an electronic device 20 according to another embodiment. The electronic device 20 and the electronic device 10 may have a similar circuit configuration. The 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, electronic units 200 (1, 1) to 200 (M, N) may be arranged in an array. In FIG. 6, the electronic units 200 (1, 1) to 200 (1, N) may be arranged in the same row, while the electronic units 200 (1, 1) to 200 (M, 1) ) May be placed in the same column. The electronic device 20 may sequentially turn on electronic units corresponding to different rows. For example, similar to the electronic device 10, the electronic device 20 may sequentially turn on the electronic units corresponding to the first to Mth rows. Therefore, the description here will not be repeated.

The difference between the electronic device 20 of FIG. 6 and the electronic device 10 of FIG. 1 is that the radiation control line EM1 to the radiation control line 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 line EM1 to the emission control line 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 are not limited thereto. In some embodiments, some of the emission control lines (such as the emission control line EM1 to the emission control line EMM) are combined and the other is combined. The discharge control line is thus separated into two or more parts. Different portions of the light emission 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 the electronic unit, scan line, data line, or other component described above is disposed on the substrate, but is 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 terminal, electronic unit, scan line, data line or other component is disposed on the same substrate and the control terminal may comprise a GOP. The material of the substrate may comprise glass, quartz, organic polymer or metal. The organic polymer may include, but is not limited to, polyimide (PI), polyethylene terephthalate (PET), polycarbonate (PC), and the like. 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, but not limited to, the electronic unit 100 (1, 1) of FIG. 2 or the electronic unit 200 (1, 1) of FIG. 7. The electronic unit 200 (1, 1) of FIG. 7 will be described in detail in subsequent paragraphs.

The aforementioned electronic units 200 (1, 1) to 200 (M, N) have a similar circuit configuration, which has the same number of switch units, drive units, LEDs or other components in the electronic units. 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 merely a simple illustration of the components or circuits basically required, the invention In other embodiments, the circuit configuration of the electronic units may be added together with other components, such as other transistors or other components, wherein the added component is one of the existing components of the electronic units in the embodiment. It can be coupled to either terminal.

In some embodiments, the circuit configuration or stacked configuration of the electronic units 100 (1, 1) to 100 (M, N) in FIG. 1 may or may not be similar. For example, the electronic units 100 (1, 1) to 100 (M, N) may emit light in different colors (including red, blue, green or other colors). The material or stacking configuration of some layers or elements of electronic units may thus be different. For example, LED chips or light emitting materials used in different electronic units may be different. Similarly, the circuit configuration or stacked 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, the electronic unit 200 (1, 1) performs a step of storing a data voltage. For example, when the switch unit 230 of the electronic unit 200 (1, 1) is turned on, the driving unit 220 receives a 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 at a corresponding brightness.

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

8 illustrates an operation sequence of the electronic units 200 (1, 1) to 200 (M, 1) of the electronic device 20. In FIG. 8, the electronic units 200 (1, 1) to 200 (M, 1) in the first column perform data storage in the time periods TP1 to TPM, respectively. After the electronic unit 200 (1, 1) obtains the data voltage in the time period TP1 in the frame period TF1 of the electronic unit 200 (1, 1), the data is in the subsequent driving period TSA. The current is generated to drive the LED 210 according to the voltage. Similarly, the electronic unit 200 (2, 1) drives the LED 210 in the driving period TSB after the storing step of the data voltage is completed in the period TP2 of the frame period TF2. 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 TBS in the frame period TF2 is substantially the same as the start time of the drive period TSA in the frame period TF1. Therefore, 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 TBS may be substantially the same, but are not limited thereto. 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 with the end time of the drive period TSA. The end time of the driving period TSB may be different. In FIG. 8, although the electronic units 200 (1, 1) to 200 (M, 1) respectively perform data storage in different periods TP1 to TPM, the electronic units 200 (1, 1) to 1. 200 (M, 1) may drive the 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 the different rows is the same, the LEDs in the electronic units can emit light simultaneously. The foregoing "simultaneous" may be defined as a time difference of less than about 10 μS, but is not limited thereto. Also, "simultaneously" can be described using other embodiments. Electronic units in the same row are coupled to the same voltage signal line. For example, the electronic units 200 (1, 1) to 200 (M, 1) of FIG. 6 are coupled to the voltage signal line VDD1. When the voltage signal line VDD1 transfers a voltage, it may be simultaneously received by the electronic units 200 (1, 1) to 200 (M, 1).

In FIG. 8, two of such a design (eg, 200 (1.1)), because the driving period (including start time and / or end time) in the frame period of electronic units corresponding to different rows are the same. The time interval between adjacent drive periods may be greater than the time interval between two adjacent drive periods for the embodiment of FIG. 3. In some embodiments, in order to reduce flickering, the frame rate of the electronic unit can be increased above 60 Hz. In some embodiments, the frame rate may be greater than or equal to 120 Hz, but is not limited thereto.

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 design, the amount of driving current of the LED 210 can be increased to reduce color shift, increase luminous efficiency, and reduce power loss.

9 illustrates another operation sequence of the electronic units 200 (1, 1) to 200 (M, 1) of the electronic device 20. In FIG. 9, two driving periods, a driving period TSA1 ′ and a driving period TSA2 ′, may be included in the frame period TF1 ′. The driving period TSB1 'and the driving period TSB2' may be included in the frame period TF2 '. Two driving periods may also be included in the frame period TFM '. For example, the driving period TSM1 'and the driving period TSM2' may be included, but are not limited thereto. As shown in Fig. 9, the driving period TSA1 ', the driving period TBS1' and the driving period TSM1 'have substantially the same start time, but the driving period TSA1', the driving period TBS1 'and The driving period TSM1 'has a generally different end time. The driving period TSA2 ', the driving period TBS2' and the driving period TSM2 'have the same start time, but the driving period TSA1', the driving period TBS1 'and the driving period TSM2' have the same end time. Has time, but is not limited to such.

In order 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 an image, the time interval of the driving period, the number of driving periods in one frame period, two adjacent two A photo sensor corresponding to the electronic units can be used to obtain the time interval between the driving periods, the duty ratio ... and so on. The method of driving between the 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 methods may be made while maintaining the teachings of the present invention. Accordingly, the invention should be construed as limited only by the bounds and bounds of the appended claims.

Claims (20)

As an electronic device,
A first electronic unit,
The first electronic unit,
A first light emitting diode; And
And a first driving unit coupled to the first light emitting diode and receiving a first data voltage.
The first electronic unit has a plurality of driving periods in a first frame period, and the first driving unit drives the first light emitting diode according to the first data voltage in the plurality of driving periods. Electronic devices. The method of claim 1,
And the plurality of driving periods in the first frame period have the same time interval. The method of claim 1,
And at least two of the plurality of driving periods in the first frame period have different time intervals. The method of claim 1,
And the time interval between two adjacent driving periods of the plurality of driving periods is the same as the time interval between another two adjacent driving periods of the plurality of other driving periods in the first frame period. . The method of claim 1,
And the time interval between two adjacent driving periods of the plurality of driving periods is different from the time interval between another two adjacent driving periods of the plurality of driving periods in the first frame period. . The method of claim 1,
Further comprising a second electronic unit,
The second electronic unit,
A second light emitting diode; And
And a second driving unit coupled to the second light emitting diode and receiving a second data voltage.
The second electronic unit has a plurality of driving periods in a second frame period, and the second driving unit drives the second light emitting diode according to the second data voltage in a plurality of driving periods in the second frame period. An electronic device, characterized in that. The method of claim 6,
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. The method of claim 1,
The sum of time intervals of the plurality of driving periods in the first frame period is smaller than the time interval of the first frame period. The method of claim 8,
The ratio of the sum of the time intervals of the plurality of driving sections in the first frame period and the time interval of the first frame period is 1/2 or less. The method of claim 6,
The number of transistors of the first light emitting diode is different from the number of transistors of the second light emitting diode. The method of claim 1,
And an emission control line coupled to the first light emitting diode, wherein the emission control line is coupled to a control terminal. The method of claim 11,
And the control terminal comprises a gate on panel or an integrated circuit. As an electronic device,
A first electronic unit; And a second electronic unit;
The first electronic unit,
A first light emitting diode; And
And a first driving unit coupled to the first light emitting diode and receiving a first data voltage.
The second electronic unit,
A second light emitting diode;
And a second driving unit coupled to the second light emitting diode and receiving a second data voltage.
The first electronic unit has at least one driving period in a first frame period, and the first driving unit is in accordance with the first data voltage in at least one driving period in the first frame period. Drive it,
The second electronic unit has at least one driving period in a second frame period, and the second driving unit is in accordance with the second data voltage in at least one driving period in the second frame period. Drive it,
The start time of the first drive unit supplied with the first data voltage is different from the start time of the second drive unit supplied with the second data voltage, and at least one drive period in the first frame period is And a start time is equal to a start time of at least one driving period in the second frame period. The method of claim 13,
The first frame period and the second frame period correspond to the same image frame, and the sum of 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 The sum of the at least one time interval of the at least one driving period in the frame period is smaller than the time interval of the second frame period. The method of claim 13,
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. The method of claim 15,
The ratio of the sum of the at least one time interval of the at least one driving period and the time interval of the frame period in the first frame period is equal to or less than 1/2. The method of claim 13,
The number of transistors of the first light emitting diode is different from the number of transistors of the second light emitting diode. The method of claim 13,
And 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. The method of claim 18,
And the control terminal comprises a gate on panel or an integrated circuit. The method of claim 18,
And an emission control line coupled to the second light emitting diode, wherein the emission control line coupled to the second light emitting diode is coupled to a second control terminal different from the first control terminal. .

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