An electronic device, comprising: a power source unit; and a plurality of electronic units, a plurality of data lines and a plurality of scan lines, wherein each electronic unit comprises: - a first switch, coupled to the power source unit, wherein the first switch comprises a gate electrode; - a alight-emitting unit, coupled to the first switch; - a plurality of N pulse switches (PM_1~PM_N), all connected between a data line and the gate electrode of the first switch, N being a positive integer greater than 1; and - a capacitor connected between the gate electrode of the first switch and a reference voltage terminal; wherein the plurality of N pulse switches comprise a first pulse switch (PM_1) and a second pulse switch (PM_2), the electronic device is arranged such that a first operation time of the first pulse switch is twice as long as a second operation time of the second pulse switch, and the first operation time and the second operation time do not overlap, to express 2 N different gray levels from an image data coded over N bits wherein each of the pulse switches sequentially receives a separate data signal ( DS1-DSN) of said image data, transmitted through the data line, and each of said data signals (DS1-DSN) is either equal to a high voltage level ("1") or a low voltage level ("0") wherein the electronic device is arranged such that the first operation time comprises a first pulse time and a first interval time (TD2_1), the second operation time comprises a second pulse time and a second interval time (TD2_2), and the second interval time is less than or equal to the first interval time; wherein the first pulse time corresponds to a duration time that the first pulse switch is turned on, the first interval time (TD2_1) corresponds to a duration time that each of the pulse switches is turned off, the second pulse time corresponds to a duration time that the second pulse switch is turned on, and the second interval time (TD2_2) corresponds to a duration time that each of the pulse switches is turned off, wherein the electronic device is arranged such that the lengths of the first and second pulse times (T11 and T12) are similar, and the length of the first interval time (TD2_1) is greater than the length of the second interval time (TD2_2) a power source unit; and a plurality of electronic units, a plurality of data lines and a plurality of scan lines, wherein each electronic unit comprises: - a first switch, coupled to the power source unit, wherein the first switch comprises a gate electrode; - a alight-emitting unit, coupled to the first switch; - a plurality of N pulse switches (PM_1~PM_N), all connected between a data line and the gate electrode of the first switch, N being a positive integer greater than 1; and - a capacitor connected between the gate electrode of the first switch and a reference voltage terminal; - a first switch, coupled to the power source unit, wherein the first switch comprises a gate electrode; - a alight-emitting unit, coupled to the first switch; - a plurality of N pulse switches (PM_1~PM_N), all connected between a data line and the gate electrode of the first switch, N being a positive integer greater than 1; and - a capacitor connected between the gate electrode of the first switch and a reference voltage terminal; - a capacitor connected between the gate electrode of the first switch and a reference voltage terminal; wherein the plurality of N pulse switches comprise a first pulse switch (PM_1) and a second pulse switch (PM_2), the electronic device is arranged such that a first operation time of the first pulse switch is twice as long as a second operation time of the second pulse switch, and the first operation time and the second operation time do not overlap, to express 2 N different gray levels from an image data coded over N bits wherein each of the pulse switches sequentially receives a separate data signal ( DS1-DSN) of said image data, transmitted through the data line, and each of said data signals (DS1-DSN) is either equal to a high voltage level ("1") or a low voltage level ("0") wherein the electronic device is arranged such that the first operation time comprises a first pulse time and a first interval time (TD2_1), the second operation time comprises a second pulse time and a second interval time (TD2_2), and the second interval time is less than or equal to the first interval time; wherein the first pulse time corresponds to a duration time that the first pulse switch is turned on, the first interval time (TD2_1) corresponds to a duration time that each of the pulse switches is turned off, the second pulse time corresponds to a duration time that the second pulse switch is turned on, and the second interval time (TD2_2) corresponds to a duration time that each of the pulse switches is turned off, wherein the electronic device is arranged such that the lengths of the first and second pulse times (T11 and T12) are similar, and the length of the first interval time (TD2_1) is greater than the length of the second interval time (TD2_2)