CN111462686A - Driving device and driving method of display pixel - Google Patents
Driving device and driving method of display pixel Download PDFInfo
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- CN111462686A CN111462686A CN202010475948.8A CN202010475948A CN111462686A CN 111462686 A CN111462686 A CN 111462686A CN 202010475948 A CN202010475948 A CN 202010475948A CN 111462686 A CN111462686 A CN 111462686A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Abstract
A driving device and a driving method for a display pixel are provided. The driving method comprises the following steps: illuminating the first light emitting element and the second light emitting element in a first laser time interval in each of a plurality of first time intervals; and lighting the first light-emitting element and the third light-emitting element in a second laser time interval in each of the plurality of second time intervals, wherein the wavelengths of the emitted light of the first light-emitting element, the second light-emitting element and the third light-emitting element are different.
Description
Technical Field
The present invention relates to a driving device and a driving method for a display pixel, and more particularly, to a driving device and a driving method for a display pixel of a pulse type display device.
Background
In conventional pulsed display devices, current is often supplied to light the leds by a short duration of laser time drive. With the increase of the pixel density on the panel, the driving method in the prior art increases the possibility of generating flicker on the display screen due to the increase of the driving time. The prior art overcomes the above problems by increasing the scanning frequency, but this greatly increases the power consumption of the circuit.
In addition, the prior art provides a corresponding driving circuit for each light emitting diode to drive. This requires a relatively high area for layout of the driver circuits and limits the layout density of the display pixels. On the premise that the layout density of the display pixels cannot be improved, the possibility of flicker generation of the display picture is also improved.
Disclosure of Invention
The invention provides a driving device and a driving method of a plurality of display pixels, which can effectively reduce the phenomenon of display flicker.
The driving method of a display pixel of the present invention is applicable to a pulse type display device, and includes: illuminating the first light emitting element and the second light emitting element in a first laser time interval in each of a plurality of first time intervals; and illuminating the first light-emitting element and the third light-emitting element in a second laser time interval in each of the plurality of second time intervals, wherein the wavelengths of the emitted light of the first light-emitting element, the second light-emitting element and the third light-emitting element are different.
The driving device of the display pixel is suitable for a pulse type display device. The driving device comprises a first driving circuit, a second driving circuit and an output selection circuit. The first driving circuit receives the first pixel data and generates a first driving signal to drive the first light-emitting element according to the first pixel data. The second drive circuit receives the selected pixel data and generates a second drive signal according to the selected pixel data. The output selection circuit is coupled to the second driving circuit, receives the selection signal, and enables the second driving circuit to provide the second driving signal to drive the second light emitting element or the third light emitting element according to the selection signal. Wherein the wavelengths of the emitted light of the first light emitting element, the second light emitting element and the third light emitting element are different.
The driving device of another display pixel of the invention is suitable for a pulse type display device. The driving device comprises a driving circuit and an output selection circuit. The drive circuit receives the selected pixel data and generates a drive signal according to the selected pixel data. The output selection circuit is coupled with the driving circuit. The output selection circuit receives the selection signal, and enables the driving circuit to provide a driving signal to drive the first light-emitting element, the second light-emitting element or the third light-emitting element according to the selection signal.
Based on the above, the driving device of the display pixel of the invention can drive the plurality of light emitting elements to emit light in the same time interval, thereby effectively improving the intensity of the brightness and reducing the flicker phenomenon generated by the display device. In addition, by integrally laying out the driving circuits for driving the plurality of light-emitting elements, the layout density of the light-emitting elements in the display device can be improved, and the flicker phenomenon generated by the display device can be reduced.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a flow chart of a driving method of a display pixel according to an embodiment of the invention
Fig. 2 shows a timing diagram of a driving method of a display pixel according to an embodiment of the present invention.
Fig. 3A is a schematic diagram of a driving apparatus for a display pixel according to an embodiment of the invention.
Fig. 3B is a schematic diagram of a driving apparatus for a display pixel according to another embodiment of the present invention.
Fig. 4 shows a schematic diagram of an embodiment of a pixel data selection circuit.
Fig. 5 shows a circuit schematic of a driving apparatus according to an embodiment of the present invention.
Fig. 6 is a timing chart showing the operation of the light emitting device according to the embodiment of the present invention.
Fig. 7 shows a circuit diagram of a driving apparatus according to another embodiment of the present invention.
Fig. 8 shows a schematic view of a drive device according to another embodiment of the invention.
Fig. 9 shows a timing diagram for driving the light emitting device according to the embodiment of fig. 8 of the present invention.
Fig. 10 shows another driving timing diagram of the light emitting device according to the embodiment of fig. 8 of the present invention.
Description of reference numerals:
s110 and S120: step (ii) of
TD1, TD 2: time interval
t11, t 21: initialization time interval
t12, t 22: reset time zone
t13, t 23: laser time interval
301. 302: drive device
310. 320, 510, 520, 810: driving circuit
330. 530, 820: output selection circuit
340. 540: laser control switch
400: pixel data selection circuit
511. 521: driver
512. 522: compensator
C51, C52: storage capacitor
G [ n ]: scanning signal
G [ n-1 ]: preceding stage scanning signal
EM: laser control signal
DATA1, DATAR, DATAB: pixel data
DATA 2: selecting pixel data
VDD: supply voltage
VSS, DC: reference voltage
DV1, DV2, DV: drive signal
L E1-L E3, L E11-L E33 light-emitting element
SE L selection Signal
SE L1, SE L2, SE L3 selector signal
M1-M716, M7A, M7B, M7C: transistor with a metal gate electrode
G: green light
B: blue light
R: red light
C71-C74: capacitor with a capacitor element
SWEEP, GG-RES, GG-VTH: signal
T91-T1030: laser time interval
Detailed Description
Referring to fig. 1, fig. 1 is a flowchart illustrating a driving method of a display pixel according to an embodiment of the invention. The driving method shown in fig. 1 is applicable to a pulse display device. In step S110, the first and second light emitting elements are turned on for a first laser time interval in each of the plurality of first time intervals, and in step S120, the first and third light emitting elements are turned on for a second laser time interval in each of the plurality of second time intervals. Here, the first light-emitting element, the second light-emitting element, and the third light-emitting element may constitute one display pixel. The first light emitting element, the second light emitting element, and the third light emitting element may emit emission lights of different wavelengths. For example, the first light emitting element may be a green light emitting diode, the second light emitting element may be a red light emitting diode, and the third light emitting element may be a blue light emitting diode.
In addition, the first time intervals and the second time intervals are staggered on the time axis. It is noted that, in the embodiment of the invention, by lighting the two light emitting elements in a single laser time interval, the total amount of the display pixels provided in the single laser time interval can be increased, and the flicker phenomenon of the whole picture displayed by the impulse type display device can be effectively reduced.
Referring to fig. 2, fig. 2 is a timing diagram illustrating a driving method of a display pixel according to an embodiment of the invention. The first time interval TD1 has a first initialization time interval t11, a first reset time interval t12 and a first laser time interval t13 arranged in sequence. The second time interval TD2 has a second initialization time interval t21, a second reset time interval t22 and a second laser time interval t23 in sequence.
In the present embodiment, the second time interval TD2 is arranged after the first time interval TD 1. In addition, in the first laser time interval t13, the first light emitting device and the second light emitting device can be driven to emit light simultaneously, and in the first laser time interval t23, the first light emitting device and the third light emitting device can be driven to emit light simultaneously. In this way, by increasing the brightness generated in the first laser time interval t13, the brightness generated in the second reset time interval t22 can be attenuated, so that the phenomenon of excessive flicker of human vision is avoided, and the display quality is improved.
Additionally, because human eyes feel green light more sensitively, the embodiment of the invention can make the first light emitting element, which is a green light emitting diode, be turned on during both the first laser time interval t13 and the second laser time interval t 23. Of course, in other embodiments of the present invention, the designer may change the color of the light emitted by the first light emitting element, the second light emitting element and the third light emitting element according to the requirement of the product, without any fixed limitation.
Referring to fig. 3A, fig. 3A is a schematic diagram of a driving apparatus for a display pixel according to an embodiment of the invention, the driving apparatus 301 is suitable for a pulse type display apparatus, and includes driving circuits 310 and 320 and an output selection circuit 330, the driving circuit 310 receives pixel DATA1 and generates a driving signal DV1 according to the pixel DATA1 to drive a first light emitting element L E1, the driving circuit 320 receives selected pixel DATA2 and generates a driving signal dv2 according to the selected pixel DATA2, the output selection circuit 330 is coupled to the driving circuit 320, the output selection circuit 330 receives a selection signal SE L, and the driving circuit 120 provides the driving signal DV2 according to the selection signal SE L to drive a second light emitting element L E2 or a third light emitting element L E3.
In detail, the driving circuits 310 and 320 receive the power voltage VDD as an operating power, the driving circuit 310 further receives the scan signal G [ n ], the previous scan signal G [ n-1] and the laser control signal EM. and generates the driving signal DV1 to drive the first light emitting element L E1 according to the pixel DATA1 and to enable the first light emitting element L E1 to emit light, the driving circuit 320 receives the scan signal G [ n ] and the previous scan signal G [ n-1] and generates the driving signal dv2 according to the selected pixel DATA2 and to enable the driving signal DV2 to be transmitted to the second light emitting element L E2 or the third light emitting element L E3 according to the selected selection signal SE L, and the second light emitting element L E2 and the third light emitting element L E3 sequentially emit light in a time-sharing manner.
In addition, the first light emitting element, the second light emitting element, the third light emitting element L E1, L E2, and L E3 are all light emitting diodes, cathodes of the first light emitting element L E1, the second light emitting element L E2, and the third light emitting element L E3 are commonly coupled to a reference voltage terminal VSS (for example, a ground terminal), an anode of the first light emitting element L E1 receives the driving signal DV1, and anodes of the second light emitting element L E2 and the third light emitting element L E3 receive the driving signal DV2 in a time sharing manner.
Specifically, the first light emitting device L E1 can receive the driving signal DV1 to generate the emitting light during a first laser time interval of the first time interval, meanwhile, the second light emitting device L E2 can receive the driving signal DV2 to generate the emitting light, the first light emitting device L E1 can receive the driving signal DV1 to generate the emitting light during a second laser time interval of the second time interval, and meanwhile, the third light emitting device L E3 can receive the driving signal DV2 to generate the emitting light.
In addition, the two driving circuits 310 and 320 can drive three light-emitting elements (the first, second and third light-emitting elements L E1, L E2 and L E3), so that the size of the driving circuits is effectively reduced, the layout density of the display device can be increased, and the degree of the flicker phenomenon can be reduced.
Referring to fig. 3B, fig. 3B is a schematic diagram of a driving apparatus for a display pixel according to another embodiment of the invention, the driving apparatus 302 is suitable for a pulse type display apparatus, and includes driving circuits 310 and 320, an output selection circuit 330, and a laser control switch 340. unlike the previous embodiments, the laser control switch 340 is coupled between the driving circuit 310 and the first light emitting element L E1. the laser control switch 340 determines whether to provide a driving signal DV1 to drive the first light emitting element L E1 according to the laser control signal EM.
Referring to the schematic diagram of the pixel DATA selection circuit shown in fig. 4, the pixel DATA selection circuit 400 includes two switches constructed by transistors M1 and M2, wherein the transistor M1 is controlled by a first selection sub-signal SE L to be turned on or off, the transistor M2 is controlled by a second selection sub-signal SE L to be turned on or off, first terminals of the transistor M1 and the transistor M2 respectively receive the pixel DATA DATAR and DATAB, and second terminals of the transistor M1 and the transistor M2 jointly generate the selected pixel DATA 2.
In operation details, taking the embodiment of fig. 3A as an example, the data selecting operation of the pixel data selecting circuit 400 corresponds to the selecting operation of the driving signal DV2 by the output selecting circuit 330, when the transistor M1 is turned on (the transistor M2 is turned off), the pixel data selecting circuit 400 selects the pixel data DATAR as the selected data data2. at this time, the output selecting circuit 330 supplies the driving signal DV2 to drive the second light emitting element L E2. further, when the transistor M2 is turned on (the transistor M1 is turned off), the pixel data selecting circuit 400 selects the pixel data DATAR as the selected data data2. at this time, the output selecting circuit 330 supplies the driving signal DV2 to drive the third light emitting element L E3.
In the above example, the pixel DATA DATAR corresponds to a red gray scale value of the pixel, the pixel DATA DATAB corresponds to a blue gray scale value of the pixel, the second LED L E2 is a red LED, and the third LED L E3 is a blue LED, in addition, the pixel DATA DATA1 corresponds to a green gray scale value of the pixel, and the first LED L E1 is a green LED.
Referring to fig. 5, fig. 5 is a circuit diagram of a driving device according to an embodiment of the invention. The driving apparatus 500 includes driving circuits 510 and 520, an output selection circuit 530, and a laser control switch 540. The driving circuit 510 includes a driver 511, a reset switch provided by a transistor M55, a laser switch provided by a transistor M52, a data input switch provided by a transistor M51, a compensator 512, and a storage capacitor C51. The driver 511 and the compensator 512 are respectively constructed by transistors M53 and M54.
The first terminal of the transistor M53 receives the power voltage VDD through the transistor M52, and the control terminal of the transistor M53 is coupled to one terminal of the storage capacitor C51, thereby receiving a control bias voltage. The second terminal of the transistor M53 is coupled to the laser control switch 540. The other end of the storage capacitor C51 receives the power supply voltage VDD.
The transistor M54 serving as the compensator 512 is coupled between the second terminal and the control terminal of the transistor M53 for compensating the variation of the turn-on voltage of the transistor M53. The first terminal of the transistor M52 receives the power voltage VDD, the second terminal of the transistor M52 is coupled to the first terminal of the transistor M53, and the control terminal of the transistor M52 receives the laser control signal EM.
In addition, the transistor M55 is coupled between the reference voltage DC and the control terminal of the transistor M53. The control terminal of the transistor M55 receives the previous stage scanning signal G [ n-1], and adjusts the control bias voltage during the reset time interval so that the control bias voltage is equal to the reference voltage DC. One end of the transistor M51, which is used as a DATA input switch, receives the pixel DATA1 and is turned on according to the scan signal G [ n ] during the DATA writing time interval, so that the pixel DATA1 is written into the storage capacitor C51.
On the other hand, the driving circuit 520 includes a driver 521, a reset switch provided by the transistor M511, a laser switch provided by the transistor M58, a data input switch provided by the transistor M57, a compensator 522, and a storage capacitor C52. The driver 521 and the compensator 522 are respectively constructed by transistors M59 and M510.
In the present embodiment, the driving circuit 520 and the driving circuit 510 have substantially the same circuit structure, and details are not repeated.
The output selection circuit 530 includes two switches constructed by transistors M512 and M513. the transistor M512 is coupled between the second terminal of the transistor M59 and the second light emitting element L E2 and controlled by the first selection sub-signal SE L1. the transistor M513 is coupled between the second terminal of the transistor M59 and the third light emitting element L E3 and controlled by the second selection sub-signal SE L2.
The laser control switch 540 is constructed by a transistor M56, a transistor M56 is coupled between the transistor M53 and the first light emitting element L E1, and a transistor M56 is controlled by a laser control signal EM.
In operation, taking the driving circuit 510 as an example, in the reset time interval, the transistor M55 is turned on, and the transistors M51, M52, and M54 are all turned off, at the same time, the first light emitting element L E1 does not generate emitting light.
In the present embodiment, the driving circuits 510 and 520 are both a circuit architecture of 6T1C (6 transistors and 1 capacitor).
Referring to fig. 6, fig. 6 shows a timing diagram of the operation of the light emitting device according to the embodiment of the invention, corresponding to the embodiment of fig. 5, different laser time intervals can be defined according to the laser control signal EM, the laser control signal EM is pulled down to a low voltage level (enabled) in the first laser time interval, the driving device 500 can drive the light emitting elements L E1 and L E2 to respectively transmit the green light G and the red light r according to the pulled down first selection sub-signal SE L1, the laser control signal EM is pulled down to a low voltage level again in the second laser time interval, and the driving device 500 can drive the light emitting elements L E1 and L E3 to respectively transmit the green light G and the blue light B according to the pulled down second selection sub-signal SE L2.
Referring to fig. 7, fig. 7 is a circuit diagram of a driving device according to another embodiment of the invention. The driving apparatus 700 includes driving circuits 710 and 720, an output selection circuit 730, and a laser control switch 740. In the present embodiment, the driving circuit 710 includes transistors M71 to M78 and capacitors C71 and C72, and the driving circuit 720 includes transistors M79 to M716 and capacitors C73 and C74. In the present embodiment, the driving circuit 710 and the driving circuit 720 are circuit structures of 8T2C (8 transistors and 2 capacitors). The transistors M78 and M715 receive the signal SWEEP and are controlled by the signal GG-RES. The transistors M73 and M710 are controlled by the scan signal G1[ n ], and respectively receive the pixel DATA DATA1 and the selected pixel DATA DATA 2. The transistors M76 and M713 act as drivers and generate different driving signals, respectively. The transistors M75 and M78 are controlled by signals GG-VTH and GG-RES, respectively, and the transistors M712 and M715 are also controlled by signals GG-VTH and GG-RES, respectively. The transistors M77 and M715 are also controlled by the scan signal G2[ n ].
On the other hand, the output selection circuit 730 is formed of transistors M7B and M7C. The laser control switch 740 is formed by a transistor M7A.
According to the embodiment of the present invention and the embodiment of fig. 5, it can be seen that the driving circuit in the driving device of the embodiment of the present invention can be implemented by different circuit architectures. The circuit diagrams of fig. 5 and 7 are merely illustrative examples. Incidentally, in the embodiments of fig. 5 and 7, the circuit architectures of the driving circuits in the same driving device may be different.
Referring to fig. 8, fig. 8 shows a schematic diagram of a driving apparatus according to another embodiment of the invention, the driving apparatus 800 includes a driving circuit 810 and an output selection circuit 820, the driving circuit 810 is coupled to the output selection circuit 820, the driving circuit 810 receives selected pixel DATA, the output selection circuit 820 generates a driving signal DV. according to the selected pixel DATA, receives a selection signal including selection sub-signals SE L1, SE L2, S L E3, and enables the driving circuit 810 to provide the driving signal DV to drive the first light emitting element L E1, the second light emitting element L E2, or the third light emitting element L E3 according to the selection sub-signals SE L1, SE L2, S L E3.
In the present embodiment, the driving circuit 810 can be implemented by using any one of the driving circuits in the embodiments of fig. 5 and 7. Taking the driving circuit 510 as an example, the driving circuit 810 receives the scan signal G [ n ], the previous scan signal G [ n-1] and the laser control signal EM, and generates the driving signal DV according to the selected pixel DATA DATA.
The output selection circuit 820 may include a plurality of switches, and respectively transmit the driving signal DV to one of the first light emitting element L E1, the second light emitting element L E2, and the third light emitting element L E3 in the same laser time interval according to the selection sub-signals SE L1, SE L2, and S L E3.
It should be noted that the output selection circuit 820 can sequentially transmit the driving signal DV to the first light emitting element L E1, the second light emitting element L E2 and the third light emitting element L E3. in a plurality of laser time intervals, and enable the first light emitting element L E1, the second light emitting element L E2 and the third light emitting element L E3 to sequentially generate the emitted lights with different wavelengths in different laser time intervals.
The source of the selected pixel DATA DATA may be adjusted according to the selection operation of the output selection circuit 820. taking the example where the first light emitting device L E1, the second light emitting device L E2 and the third light emitting device L E3 are a green light emitting diode, a red light emitting diode and a blue light emitting diode respectively, the selected pixel DATA DATA may be sequentially a green gray scale value of the pixel, a red gray scale value of the pixel and a blue gray scale value of the pixel corresponding to the first light emitting device L E1, the second light emitting device L E2 and the third light emitting device L E3 which are sequentially driven.
Referring to fig. 9, fig. 9 shows a driving timing diagram of the light emitting device of the embodiment of fig. 8 of the present invention, in fig. 9, the driving apparatus includes a plurality of driving circuits and a plurality of output selection circuits respectively corresponding to the driving circuits, wherein each of the driving circuits and the output selection circuits is used for driving three light emitting devices, for example, L E11, L E12, L0E 13 are coupled to the same first driving circuit, L1E 21, L E22, L E23 are coupled to the same second driving circuit, furthermore, L E11, L E21 form a first pixel, L E12, L E22 form a second pixel, and L E13, L E23 form a third pixel.
In the first laser time interval T91, the first and second driving circuits simultaneously enable the light emitting elements L E11, L E21 to emit light, in the second laser time interval T92, the first and second driving circuits simultaneously enable the light emitting elements L E12, L E22 to emit light, and in the third laser time interval T93, the first and second driving circuits simultaneously enable the light emitting elements L E13, L E23 to emit light.
Incidentally, in this embodiment, the light emitting elements L E11 and L E23 are red light emitting diodes, the light emitting elements L E12 and L E21 are green light emitting diodes, and the light emitting elements L E13 and L E22 are blue light emitting diodes.
Referring to fig. 10, fig. 10 shows another driving timing diagram of the light emitting device according to the embodiment of the invention shown in fig. 8, in fig. 10, the driving apparatus includes a plurality of driving circuits and a plurality of output selection circuits respectively corresponding to the driving circuits, wherein each group of driving circuits and output selection circuits is used for driving three light emitting devices, for example, the light emitting devices L E L, L E L are coupled to the same first driving circuit, the light emitting devices L E L, L E L are coupled to the same second driving circuit, the light emitting devices L E L, L E L are coupled to the same third driving circuit, in addition, the light emitting devices L E L, L form a first pixel, the light emitting devices L E L, L form a second pixel, and the light emitting devices L E L, L E L form a third pixel.
In the first laser time interval T1010, the first, second and third driving circuits simultaneously enable the light emitting elements L E11, L E21, L31 to generate emission light, in the second laser time interval T1020, the first, second and third driving circuits simultaneously enable the light emitting elements L E12, L E22, L32 to generate emission light, and in the third laser time interval T1030, the first, second and third driving circuits simultaneously enable the light emitting elements L E13, L E23, L33 to generate emission light.
Incidentally, in this embodiment, the light emitting elements L E11, L E23 and L E32 are red light emitting diodes, the light emitting elements L E12, L E21 and L E33 are green light emitting diodes, and the light emitting elements L E13, L E22 and L E31 are blue light emitting diodes.
In summary, the driving device of the present invention drives the plurality of light emitting elements to generate the emitted light in the same laser time interval, so as to increase the brightness of the emitted light generated in the same laser time interval and effectively reduce the possibility of flicker generation on the display screen. In the embodiment of the invention, the plurality of light-emitting elements share the same drive circuit, so that the circuit area is effectively reduced, the layout density of display pixels is improved, and the possibility of flicker generation of a display picture is effectively reduced.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (21)
1. A method of driving a display pixel, comprising:
illuminating a first light emitting element and a second light emitting element in a first laser time interval of each of a plurality of first time intervals; and
illuminating the first light emitting device and a third light emitting device in a second laser time interval of each of a plurality of second time intervals,
wherein the wavelengths of the emitted light of the first light-emitting element, the second light-emitting element and the third light-emitting element are different.
2. The driving method according to claim 1, wherein each of the first time intervals further includes a first reset time interval and a first initialization time interval, and each of the second time intervals further includes a second reset time interval and a second initialization time interval.
3. The driving method according to claim 1, wherein each of the first time intervals is staggered with each of the second time intervals.
4. The driving method according to claim 1, wherein the first light emitting element is a green light emitting diode, the second light emitting element is a red light emitting diode, and the third light emitting element is a blue light emitting diode.
5. A driving arrangement for a display pixel, suitable for a pulsed display arrangement, comprising:
a first driving circuit for receiving a first pixel data and generating a first driving signal to drive a first light emitting element according to the first pixel data;
the second drive circuit receives selected pixel data and generates a second drive signal according to the selected pixel data; and
an output selection circuit coupled to the second driving circuit for receiving a selection signal and enabling the second driving circuit to provide the second driving signal to drive a second light emitting device or a third light emitting device according to the selection signal,
wherein the wavelengths of the emitted light of the first light-emitting element, the second light-emitting element and the third light-emitting element are different.
6. The device according to claim 5, wherein the first driving circuit and the second driving circuit make the first light emitting device and the second light emitting device emit light at a plurality of first laser time intervals simultaneously, and make the first light emitting device and the third light emitting device emit light at a plurality of second laser time intervals simultaneously.
7. The driving apparatus of claim 6, wherein the first laser time intervals respectively occur in a plurality of first time intervals, the second laser time intervals respectively occur in a plurality of second time intervals, and each of the first time intervals and each of the second time intervals are staggered.
8. The driving device as claimed in claim 5, further comprising a pixel data selecting circuit coupled to the second driving circuit for selecting one of a second pixel data and a third pixel data to generate the selected pixel data.
9. The driving device as claimed in claim 5, wherein each of the first driving circuit and the second driving circuit is a pulse width modulation control driving circuit or a pulse amplitude modulation driving circuit.
10. The driving apparatus as claimed in claim 5, wherein each of the first driving circuit and the second driving circuit comprises:
a driver, receiving a power voltage and coupled to the corresponding light emitting element, wherein a control end of the driver receives a control bias voltage;
a reset switch, receiving a reference voltage, controlled by a preceding scanning signal to adjust the control bias voltage in a reset time interval;
a laser switch coupled between the paths of the driver for receiving the power voltage and turned on in a laser time interval;
one end of the storage capacitor is coupled to the control end of the driver, and the other end of the storage capacitor receives the power supply voltage;
a compensator coupled between the control end of the driver and the correspondingly driven light-emitting element for compensating the variation of the conducting voltage of the driver; and
and the data input switch receives the corresponding pixel data and enables the corresponding pixel data to be written into the storage capacitor in a data writing time interval.
11. The driving apparatus of claim 5, wherein the output selection circuit comprises:
a first switch; and
a second switch for controlling the operation of the switch,
the first switch and the second switch are coupled to each other at first ends and receive the second driving signal, the first switch and the second switch are coupled to the first light emitting element and the second light emitting element at second ends respectively, and the first switch and the second switch receive a first selection sub-signal and a second selection sub-signal of the selection signal at control ends respectively.
12. The driving device as claimed in claim 5, wherein the first light-emitting element is a green light-emitting diode, the second light-emitting element is a red light-emitting diode, and the third light-emitting element is a blue light-emitting diode.
13. The drive device of claim 5, further comprising:
and a laser control switch coupled between the first driving circuit and the first light emitting element for determining whether to provide the first driving signal to drive the first light emitting element according to a laser control signal.
14. A driving arrangement for a display pixel, suitable for a pulsed display arrangement, comprising:
a first drive circuit for receiving a first selected pixel data and generating a first drive signal according to the first selected pixel data; and
a first output selection circuit coupled to the first driving circuit for receiving a selection signal, and enabling the first driving circuit to provide the first driving signal to drive a first light emitting device, a second light emitting device or a third light emitting device according to the selection signal,
wherein the wavelengths of the emitted light of the first light-emitting element, the second light-emitting element and the third light-emitting element are different.
15. The driving device of a display pixel according to claim 14, further comprising:
a pixel data selection circuit coupled to the driving circuit for selecting one of a first pixel data, a second pixel data and a third pixel data to generate the selected pixel data.
16. The driving device of a display pixel according to claim 14, wherein the driving circuit comprises:
a driver, receiving a power voltage and coupled to the corresponding light emitting element, wherein a control end of the driver receives a control bias voltage;
a reset switch, receiving a reference voltage, controlled by a preceding scanning signal to adjust the control bias voltage in a reset time interval;
a laser switch coupled between the paths of the driving circuit for receiving the power voltage and turned on in a laser time interval;
one end of the storage capacitor is coupled to the control end of the driver, and the other end of the storage capacitor receives the power supply voltage;
a compensator coupled between the control end of the driver and the correspondingly driven light-emitting element for compensating the variation of the conducting voltage of the driver; and
and the data input switch receives the corresponding pixel data and enables the corresponding pixel data to be written into the storage capacitor in a data writing time interval.
17. The display pixel driving apparatus according to claim 14, wherein the output selection circuit comprises:
a first switch;
a second switch; and
a third switch, which is connected to the first switch,
the first switch, the second switch and the third switch are coupled to receive the driving signal, the second switch and the third switch are coupled to the first light emitting element, the second light emitting element and the third light emitting element, respectively, and the control terminals of the first switch, the second switch and the third switch receive a first selection sub-signal, a second selection sub-signal and a third selection sub-signal of the selection signal, respectively.
18. The device according to claim 14, wherein the output selection circuit sequentially provides the driving signals to the first light emitting element, the second light emitting element and the third light emitting element.
19. The device for driving a display pixel according to claim 14, wherein the first light emitting element, the second light emitting element and the third light emitting element are a green light emitting diode, a red light emitting diode and a blue light emitting diode, respectively.
20. The driving device of a display pixel according to claim 14, further comprising:
the second drive circuit receives a second selected pixel data and generates a second drive signal according to the second selected pixel data; and
a second output selection circuit coupled to the second driving circuit for receiving the selection signal and enabling the second driving circuit to provide the second driving signal to drive a fourth light emitting device, a fifth light emitting device or a sixth light emitting device according to the selection signal,
the first light-emitting element and the fourth light-emitting element are simultaneously lightened and have different emitted light wavelengths; the second light-emitting element and the fifth light-emitting element are lighted at the same time and have different emitted light wavelengths; and the third light-emitting element and the sixth light-emitting element are lighted simultaneously and have different emitted light wavelengths
21. The driving device of the display pixel according to claim 20, further comprising:
a third driving circuit for receiving a third selected pixel data and generating a third driving signal according to the third selected pixel data; and
a third output selection circuit coupled to the third driving circuit for receiving the selection signal and enabling the third driving circuit to provide the third driving signal to drive a seventh light emitting device, an eighth light emitting device or a ninth light emitting device according to the selection signal,
the first light-emitting element, the fourth light-emitting element and the seventh light-emitting element are simultaneously lightened and have different emitted light wavelengths; the second light-emitting element, the fifth light-emitting element and the eighth light-emitting element are simultaneously lightened and have different emitted light wavelengths; and the third light emitting element, the sixth light emitting element and the ninth light emitting element are simultaneously lighted and have different emitted light wavelengths.
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| TW108145104 | 2019-12-10 | ||
| TW108145104A TWI737072B (en) | 2019-12-10 | 2019-12-10 | Driving device of display pixel and driving method thereof |
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| CN111462686B (en) | 2022-04-26 |
| TW202123203A (en) | 2021-06-16 |
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