WO2019113823A1

WO2019113823A1 - Display device and display driving method

Info

Publication number: WO2019113823A1
Application number: PCT/CN2017/115884
Authority: WO
Inventors: 郭星灵; 谭小平
Original assignee: 深圳市柔宇科技有限公司
Priority date: 2017-12-13
Filing date: 2017-12-13
Publication date: 2019-06-20
Also published as: CN111433840A

Abstract

A display device (100) and a display driving method capable of reducing power consumption while maintaining or improving the display screen quality. The display device (100) comprises a driving circuit (1), a plurality of light-emitting display devices (2) arranged in an array, and a processing unit (3). The driving circuit (1) includes multiple driving units (11), and each driving unit (11) corresponds to a light-emitting display device (2) and comprises a display driving sub-unit (12) and an adjusting sub-unit (13); the processing unit (3) is connected with all the multiple driving units (11) for applying, according to display data of a current display screen, a corresponding driving signal to the corresponding display driving sub-units (12) to drive, by means of the corresponding display driving sub-units (12), the corresponding light-emitting display devices (2) to emit light; the processing unit (3) is also configured to control, according to the display parameters of the display screen, the corresponding adjusting sub-units (13) to adjust the light emission of the light emitting display devices (2).

Description

Display device and display driving method

Technical field

The present invention relates to a display technology, and in particular, to a display device and a display driving method.

Background technique

The power consumption of existing electronic devices such as mobile phones and tablet computers generally accounts for 60%-70% of the power consumption of the whole machine, while in the screen, the backlight power consumption accounts for 70%-80% of the total screen power consumption. With the current development of electronic devices such as mobile phones, the built-in battery capacity is getting smaller and smaller. How to make the screen more power-saving and improve the endurance of the electronic device has become a consistent goal in the industry.

The current mainstream display screens include TFT-LCD screens, AMOLED (Active Matrix/Organic Light Emitting Diode) screens, etc. Since the display effect of the AMOLED screen is better, the application is more and more extensive.

Among them, in the AMOLED display architecture, each pixel is a self-luminous independent control body, and the energy consumption of the illumination directly comes from the anode power supply end and the cathode power supply end of the light emitting diode, and drives the pixel in the power consumption of the AMOLED display screen. The energy consumption of diode illumination is still a large part of the AMOLED display energy consumption. At present, the conventional AMOLED screen power-saving power consumption method is to control the size of the LED current by adjusting the Gamma voltage of the pixel electrode to achieve the purpose of power saving, but the brightness of the display screen needs to meet the human eye. The characteristics of Gamma 2.2, so when adjusting the Gamma voltage of the pixel electrode, the brightness of all gray scales can only be controlled up or down by the feedback of the display brightness of the entire display screen, although the power saving effect can also be achieved, but the display screen is displayed. The quality of the picture is greatly reduced.

Summary of the invention

The embodiment of the invention discloses a display device and a display driving method, which can effectively reduce the power consumption of the display screen and maintain the display quality of the display screen.

Embodiments of the present invention disclose a display device including a driving circuit, a plurality of light emitting display devices arranged in an array, and a processing unit, the driving circuit including a plurality of driving units, each driving The unit is corresponding to a light-emitting display device, each of the driving units includes a display driving sub-unit and an adjusting sub-unit, and the processing unit is connected to the plurality of driving units for applying a corresponding driving signal according to display data of the current display screen. And corresponding to the display driving subunit, to drive the corresponding light emitting display device to emit light by using the corresponding display driving subunit, and the processing unit is further configured to control the corresponding adjusting subunit to the light emitting display device according to the display parameter of the display screen The illumination is adjusted.

The embodiment further discloses a display driving method, which is applied to a display device, wherein the display device comprises a plurality of arrayed light emitting display devices and a plurality of driving units, each driving unit corresponding to a light emitting display device, each driving unit a display driving subunit and a regulating subunit; the display driving method includes the steps of: applying a corresponding driving signal to the corresponding display driving subunit according to the display data of the current display screen, to drive the corresponding by the corresponding display driving subunit The illuminating display device emits light; and applies a corresponding adjustment signal to the corresponding adjusting sub-unit according to the display parameter of the display screen to control the corresponding adjusting sub-unit to adjust the illuminating of the corresponding illuminating display device.

In the display device and the display method of the present invention, in addition to displaying a display screen by illuminating a light-emitting display device that drives a display device by a driving signal, the light-emitting display device of the display device is adjusted according to display parameters of the display screen, thereby The power consumption of the light emitting display device is reduced while the display quality of the display screen is improved or maintained.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without paying any creative work.

1 is a block diagram showing the structure of a display device in an embodiment of the present invention.

FIG. 2 is a schematic diagram showing the specific structure of a driving unit in a display device according to an embodiment of the invention.

FIG. 3 is a schematic diagram of partitioning a display screen according to an embodiment of the present invention.

4 is a schematic diagram showing generation of an adjustment signal of each partition of a display screen according to an embodiment of the present invention; Figure.

FIG. 5 is a schematic diagram showing changes of an adjustment signal of a multi-frame display screen according to an embodiment of the present invention.

FIG. 6 is a structural block diagram of a processing unit in an embodiment of the present invention.

FIG. 7 is a flowchart of a display driving method according to an embodiment of the present invention.

Figure 8 is a sub-flow diagram of step S73 of Figure 7.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Please refer to FIG. 1 , which is a structural block diagram of a display device 100 according to an embodiment of the present invention. As shown in FIG. 1, the display device 100 includes a driving circuit 1, a plurality of light emitting display devices 2 arranged in an array, and a processing unit 3. The at least one illuminating display device 2 can correspond to one pixel of the display device 100. The number of the at least one illuminating display device 2 is determined by the resolution of the display device 100. Only two illuminating display devices 2 are illustrated in FIG. As an example.

The driving circuit 1 is electrically connected to the processing unit 3 and the plurality of light emitting display devices 2 arranged in an array, and the driving circuit 1 is configured to apply a corresponding driving signal according to display data of the current display screen to drive the corresponding The light emitting display device 2 emits light, and the processing unit 3 is configured to control the driving circuit 1 to adjust the light emission of the light emitting display device 2 according to display parameters of the display screen.

The driving circuit 1 includes a plurality of driving units 11, the number of the driving units 11 is the same as the number of the light emitting display devices 2, and each driving unit 11 is electrically connected to a light emitting display device 2 for driving corresponding The light-emitting display device 2 emits light. Each of the driving units 11 includes a display driving sub-unit 12 and an adjusting sub-unit 13. The processing unit 3 is connected to the plurality of driving units 12 for applying a corresponding driving signal to the corresponding display data according to the current display screen. The display driving sub-unit 12 is configured to drive the corresponding light-emitting display device 2 to emit light by the corresponding display driving sub-unit 12, and the processing unit 3 is further configured to control the corresponding according to the display parameter of the display screen. The adjustment sub-unit 13 adjusts the illumination of the corresponding light-emitting display device 2, while reducing the display power quality of the display screen while reducing the illumination energy consumption.

In some embodiments, please refer to FIG. 2 together, which is a schematic structural diagram of a driving unit 11. The display driving subunit 12 of each driving unit 11 includes a scan switch tube T1 and a drive switch tube T2. The driving switch tube T2 is electrically connected between a driving power source Vpos, the scan switch tube T1 and the corresponding light emitting display device 2. The scan switch tube T1 is also electrically connected to the processing unit 3.

The driving signal applied by the processing unit 3 according to the display data of the current display screen includes a scan signal Gn and a data signal Dn, and the processing unit 3 outputs the scan signal Gn to the corresponding scan switch tube T1 to control the scan switch tube. T1 is turned on, and outputs a data signal Dn to the turned-on scan switch tube T1 to transmit the data signal Dn to the drive switch tube T2 through the turned-on scan switch tube T1, and controls the drive The conduction state of the switch tube T2 and the degree of conduction, that is, the drive switch tube T2 is turned on with a certain degree of conduction, so that the driving power source Vpos can apply a corresponding driving voltage to the light emitting display device 2 to control the light emission. The display device 2 corresponds to light emission.

As shown in FIG. 2, the adjustment subunit 13 includes an adjustment switch tube T3 electrically connected between the driving power source Vpos and a corresponding light emitting display device 2, and the processing unit 3 is configured to The display parameter of the display screen controls the output of the adjustment signal En having the corresponding duty ratio to the adjustment sub-unit 13 / the adjustment switch T3 to further change the drive voltage supplied to the light-emitting display device 2 by the drive power source Vpos for the illumination The illumination of the display device 2 is adjusted.

Wherein, the display data of the display screen determines the driving signal, that is, which of the light-emitting display devices 2 in the array of the light-emitting display devices 2 are to be controlled to emit light and emit light, so that the arrays are arranged to emit light. The light emission of the display device 2 forms the display screen.

In some embodiments, the display parameter is grayscale information of a currently displayed screen. The gray scale information includes at least information of a gray scale distribution, a gray scale turning brightness calculation color hue (Hue), and saturation.

The processing unit 3 controls the corresponding adjustment sub-unit 13 to adjust the illumination of the corresponding illumination display device 2 according to the gray scale information of the current display screen, and further adjusts the display screen so as to save energy consumption without degrading the display quality. Further, the processing unit 3 further controls the output of the adjustment signal En having the corresponding duty ratio to the adjustment subunit 13 / the adjustment switch T3 according to the gray scale information of the display screen to further change the driving power supply Vpos to provide illumination. Display device 2 drive power The light emission of the light-emitting display device 2 is adjusted while being pressed.

In some embodiments, the processing unit 3 further outputs an initial enable signal E1 to the adjustment switch T3 according to the display data of the display screen, and the initial enable signal is applied to the corresponding synchronization signal synchronously with the scan signal. The adjustment switch tube T3 of the driving unit 11 and the scan switch tube T1 are such that the same drive unit 11 synchronously applies the initial enable signal E1 when the scan signal is applied, so that the adjustment switch tube T3 is synchronously turned on to drive The power source Vpos can supply power to the light emitting display device 12.

In the present application, the adjustment signal En is a signal obtained by converting the initial enable signal E1 and finally outputting to the adjustment switch T3. In the normal case, the initial enable signals E1 of all the regulating switches T3 are the same.

In some embodiments, the processing unit 3 controls the corresponding adjustment sub-unit 13 to adjust the illumination of the corresponding illumination display device 2 according to the grayscale information of the current display screen, including: counting the grayscale information of the entire current display screen (including: Gray scale distribution, gray scale conversion brightness calculation color hue, saturation, etc.); determining PWM (pulse width modulation) of the initial enable signal of each switch unit T3 of each drive unit 11 according to the statistical gray scale information The modulation signal) gain G1 combines the initial enable signal E1 of the adjustment switch T3 of each drive unit 11 with the corresponding PWM gain G1 to obtain an adjustment signal En, and applies the adjustment signal to the corresponding adjustment switch tube T3. En, thereby adjusting the illumination of the corresponding light-emitting display device 2.

In general, the applied initial enable signal E1 is a continuous high level signal. For the same driving unit 11, the regulating switch tube T3 is continuously guided for the duration of applying the scan signal Gn to the scan switch tube T1. In response to the action of the data signal Dn, the driving power source Vpos can supply a corresponding voltage to the light-emitting display device 2 to control the light-emitting display device 2 to emit corresponding light.

In the present application, the adjustment signal En in the form of a PWM signal is obtained by combining the initial enable signal E1 which is the continuous high level signal with the PWM gain G1, so that during the duration of applying the scan signal Gn to the scan switch tube T1, The power supply to the light-emitting display device 2 is cut off at a part of time, thereby achieving an energy-saving effect. In addition, since the PWM gain G1 is reasonably derived based on the gray-scale information, the display effect of the corresponding pixel point is not affected.

Please refer to FIG. 3 together for a schematic diagram of partitioning a display screen in an embodiment. In an embodiment, the determining, by the processing unit 3, the PWM gain G1 of the initial enable signal of the adjustment switch T3 of each driving unit 11 according to the statistical gray scale information includes: the processing unit 3 according to the system The grayscale information of the current display picture is divided into the current display picture P1 to obtain a plurality of partitions F1 to Fn; the processing unit 3 determines the PWM gain G1 of each partition and the coordinate value range of each partition, and according to The range of coordinate values of each partition determines the light-emitting display device 2 corresponding to each of the partitions, and then determines the PWM gain G1 of the initial enable signal of the plurality of drive units 11 corresponding to the light-emitting display device 2 in each partition as described Corresponding to the PWM gain G1 of the partition, the PWM gain G1 of the initial enable signal of the adjustment switch T3 of all the driving units 11 is obtained.

Referring to FIG. 4 together, the initial enable signal E1 of the adjustment switch tube T3 of each drive unit 11 is combined with the corresponding PWM gain G1 to obtain the adjustment signal En of the adjustment switch tube T3 of each drive unit 11 including: The initial enable signal E1 of the adjustment switch tube T3 of the corresponding driving unit 11 of the internal light-emitting display device 2 is combined with the PWM gain G1 of the corresponding partition to obtain the adjustment switch tube T3 of the driving unit 11 corresponding to the light-emitting display device 2 in each partition. The adjustment signal En is obtained, thereby obtaining the adjustment signal En of each partition.

Therefore, in the subsequent display process of the display screen, when a driving signal including a scan signal and a data signal is applied to a certain driving unit 11 to drive the corresponding light emitting display device 2 to perform light emitting display, the processing unit 2 according to the The partition in which the display device 2 is located is illuminated, and the predetermined adjustment signal En of the partition is acquired, and the adjustment signal En is applied to the adjustment switch T3.

In other embodiments, the adjustment signal En of each partition may not be predetermined. When a driving signal including a scan signal and a data signal is applied to a certain driving unit 11 to drive the corresponding light emitting display device 2 to perform light emitting display, The processing unit 2 determines a corresponding PWM gain G1 according to the partition in which the light emitting display device 2 is located, and controls the initial enable signal E1 to be combined with the PWM gain G1 to obtain an adjustment signal En in the form of a PWM signal, and adjusts the adjustment signal En The switching tube T3 applies the adjustment signal En to perform corresponding illumination adjustment.

In this embodiment, the display mode of the display device 100 is a line scanning mode, and each of the foregoing partitions F1 FFn includes at least one row of pixel points, and the coordinate value range of the partition also includes at least one row of pixel points. coordinate of.

In some embodiments, the processor 3 determines that the PWM gain G1 of each partition is determined according to at least the brightness and/or contrast of the respective partitions, wherein the processor 3 has a higher brightness of a certain partition, Determining that the higher the PWM gain G1 is, the lower the brightness of a certain partition is, the lower the PWM gain G1 is determined; and/or the higher the contrast of the processor 3 is, the higher the contrast of a certain partition is. The higher the PWM gain G1 of the partition, the lower the contrast of a certain partition, the lower the PWM gain G1 of the partition is determined. That is, the PWM gain G1 is proportional to the brightness and/or contrast of the corresponding partition.

Wherein, the PWM gain G1 is expressed as a PWM signal, and the higher the PWM gain G1 is the higher the duty ratio of the PWM signal, and the lower the PWM gain G1 is the duty ratio of the PWM signal. The lower.

The adjusting signal En in the form of a PWM signal obtained by combining the initial enable signal E1 with the PWM gain G1 means multiplying the initial enable signal E1 by the PWM gain G1 in the form of the PWM signal to obtain the PWM signal. The form of the adjustment signal En.

Therefore, in the present application, by dividing the display screen, different PWM gains G1 are determined for different partitions, and the adjustment signals En of different partitions are obtained, and the partitions can be better targeted according to the gray scale information of each partition. The display is adjusted to achieve the effect of enhancing or maintaining the display effect and reducing the energy consumption.

In another embodiment, the determining, by the processing unit 3, the PWM gain G1 of the initial enable signal of the adjustment switch T3 of each driving unit 11 according to the statistical gray scale information includes: the processing unit according to the current display of the statistics The gray scale information of the picture determines the overall brightness and/or contrast of the current display picture, and then determines the overall PWM gain G1 of the current display picture according to the overall brightness and/or contrast of the current display picture, and then determines the adjustment switch tube T3 of each drive unit 11. The PWM gain G1 of the initial enable signal is the overall PWM gain G1.

That is, in another embodiment, the processing unit 3 does not partition each/frame display picture, but determines different PWM gains G1 suitable for the entire display picture according to the display picture gray scale information of different frames.

Similarly, the processor 3 determines that the PWM gain G1 of each display screen is determined according to at least an overall brightness and/or an overall contrast of the display screen, wherein the brightness of the processor 3 on a certain display screen is higher. When the time is high, it is determined that the higher the PWM gain G1 is, the lower the brightness of a certain display picture is, the lower the PWM gain G1 is determined; and/or the higher the contrast of the processor 3 is on a certain display screen. It is determined that the higher the PWM gain G1 of the display screen is, the lower the contrast of a certain display screen is, the lower the PWM gain G1 of the display screen is determined.

Please refer to FIG. 5 together, for example, the multi-display pictures P1 to Pn in FIG. 5, along with the middle of the black area. When the white area is increased, the brightness is increased, and the PWM gain G1 is also getting larger.

The brightness of each display screen may be the average brightness of the display screen, and the contrast of each display screen may be a contrast value considering the gray scale of all the pixels of the display screen.

In another embodiment, the initial enable signal E1 of the adjustment switch T3 of each of the drive units 11 is combined with the corresponding PWM gain G1 to obtain an adjustment signal En of the adjustment switch T3 of each drive unit 11, including: When the display screen of the current frame is displayed, the initial enable signal E1 of the adjustment switch T3 of each drive unit 11 is combined with the PWM gain G1 of the display screen to obtain the adjustment of the drive unit 11 corresponding to each of the light-emitting display devices 2. The adjustment signal En of the switch tube T3.

Therefore, in another embodiment, by specifically adjusting each display screen, different display screens can be adjusted according to their own grayscale information, enhancing the overall screen display effect and reducing energy consumption.

Referring back to FIG. 2 , specifically, the light emitting display device 2 includes at least one Organic Light Emitting Diode (OLED) D1. The organic light emitting diode D1 includes a positive electrode V+ and a negative electrode V−.

The scan switch tube T1 includes a first control terminal T11, a first conduction terminal T12, and a second conduction terminal T13. The driving switch tube T2 includes a second control terminal T21, a third conduction terminal T22, and a fourth guide. The third terminal T22 and the fourth terminal T23 are electrically connected between the driving power source Vpos and the anode of the corresponding organic light emitting diode D1, and the anode V- of the organic light emitting diode D1. The second conduction end T13 of the scan switch tube T1 is connected to the second control end T21 of the drive switch tube T2, and the first control end T11 and the first conduction end T12 of the scan switch tube T1 are The processing unit 3 is connected.

The adjustment switch T3 includes a third control terminal T31, a fifth conduction terminal T32, and a sixth conduction terminal T33. The third control terminal T31 of the adjustment switch tube T3 is connected to the processing unit 3 for receiving. The adjustment signal En. The fifth conduction end T32 is electrically connected to the driving power source Vpos, and the sixth conduction end T33 is connected to the third conduction end T22 of the driving switch tube T2.

The processing unit 3 determines to apply a driving signal to a certain driving unit 11 to cause the corresponding light emitting display device 2 to perform light emitting display according to the display data of the display screen, and controls the output of the scan signal to the scan switch tube T1 of the corresponding driving unit 11. a first control terminal T11, such that the scan switch tube T1 is turned on, and controls outputting a data signal to the turned-on scan switch tube T1, and passes the guide The pass scan switch tube T1 applies the data signal to the second control terminal T21 of the second switch tube T2, and controls the second switch tube T2 to conduct a corresponding degree.

At the same time, the processor 3 determines an adjustment signal En applied to the adjustment switch tube T3 according to display parameters such as gray scale information of the display screen, and outputs the adjustment signal En to the third control of the adjustment switch tube T3. The terminal T31, because the adjustment signal En is a signal in the form of PWM, thereby converting the DC voltage outputted by the driving power source Vpos into a voltage in the form of a switching power supply, thereby causing the voltage supplied to the organic light emitting diode D1 to be changed, thereby making The illumination of the organic light emitting diode D1 is adjusted accordingly.

As shown in FIG. 2, the driving unit 11 further includes a capacitor C1, a capacitor C2, and a reset switch tube T4. The two ends of the capacitor C1 are electrically connected to the anode V+ of the organic light emitting diode D1 and the driving switch. Between the control terminals T21 of the tube T2, the voltage of the drive switch tube T2 is maintained for a period of time after the power is turned off, and the two ends of the capacitor C2 are connected to the fifth conduction end T32 of the adjustment switch tube T3. Between the positive electrode V+ of the organic light emitting diode D1 for maintaining the voltage of the driving power source Vpos, the reset switch transistor T4 includes a fourth control terminal T41, a seventh conduction terminal T42 and an eighth conduction terminal T43. The fourth control terminal T41 is configured to receive a reset signal, and the seventh conductive terminal T42 and the eighth conductive terminal T43 are respectively connected to the positive terminal V+ and the input terminal Vin of the organic light emitting diode D1. The input terminal Vin can be a ground point. The reset switch transistor T4 is turned on when the fourth control terminal T41 receives the reset signal, and grounds the positive electrode V+ of the organic light emitting diode D1 so that the voltage of the organic light emitting diode D1 is zero to perform display reset. The reset signal received by the fourth control terminal T41 may be generated by a user operating a reset button on the display device.

Herein, only one organic light emitting diode D1 is illustrated in FIG. 2. It is obvious that in other embodiments, the light emitting display device 2 may include a plurality of organic light emitting diodes D1 connected in series or in parallel.

The scan switch tube T1, the drive switch tube T2, the adjustment switch tube T3, and the reset switch tube T4 may be a MOS tube or a BJT transistor. The first control terminal T11, the second control terminal T21, the third control terminal T31, and the third control terminal T41 correspond to a gate of a MOS transistor or a base of a BJT gate tube, and the first conductive terminal T12, The third conductive terminal T22, the fifth conductive terminal T32, and the seventh conductive terminal T42 correspond to the drain of the MOS transistor or the collector of the BJT transistor, and the second conductive terminal T12 and the fourth conductive terminal T23. The sixth conduction end T33 and the eighth conduction end T43 correspond to the source of the MOS tube The emitter of a pole or BJT transistor.

Referring to FIG. 1 , the display device 100 further includes a memory 4 in which display data of a screen to be displayed is stored, and the processing unit 3 acquires display data of a screen to be displayed from the memory 4, Further, through the display data analysis, the display parameters of the display screen, that is, the gray scale information as described above, are obtained.

Referring to FIG. 6 , in some embodiments, the processing unit 3 may include a display controller 31 and a processor 31 .

The display controller 31 is connected to the scan switch tube T1 of each drive unit 11 for applying a corresponding drive signal to the corresponding display drive sub-unit 12 according to the display data of the current display screen to pass the corresponding display. The driving subunit 12 drives the corresponding light emitting display device 2 to emit light.

The processing unit 3 is further configured to control the corresponding adjustment sub-unit 13 to adjust the illumination of the corresponding illumination display device 2 according to the display parameters of the display screen.

The processor 31 is connected to the adjustment switch tube T3 in each of the driving units 11 for performing the function of adjusting the corresponding illumination sub-unit 13 according to the display parameter of the display screen to adjust the illumination of the corresponding illumination display device 2, including the foregoing The function of determining the PWM gain G1 of the screen is displayed.

In some embodiments, the display controller 31 and the processor 32 are two independent chips.

Obviously, in other embodiments, the processing unit 3 can also be an integrated chip, and has the functions of the display controller and the aforementioned adjustment functions.

The processing unit 3 or the processor 31 may be a central processing unit, a microcontroller, a microprocessor, a single chip microcomputer, a digital signal processor, or the like.

The memory 4 can be a computer readable storage medium such as a memory card, a solid state memory, a micro hard disk, an optical disk, or the like. In some embodiments, the memory 4 stores a number of program instructions that can be executed by the processing unit 3 or the processor 31 to perform the aforementioned functions.

The display device 100 can be an AMOLED display, a mobile phone including an AMOLED display, a tablet computer, a television, and the like.

Please refer to FIG. 7, which is a flowchart of a display driving method according to an embodiment of the present invention. The display driving method is applied to the aforementioned display device 100, and the order of execution is not limited to the order shown in FIG. As described above, the display device 100 includes a plurality of arrayed light-emitting display devices 2 and a drive circuit 1 electrically connected to the array-arranged light-emitting display devices 2. The method includes the steps of:

A corresponding driving signal is applied to the driving circuit 1 according to the display data of the current display screen to drive the corresponding light-emitting display device 2 to emit light by the driving circuit 1 (S71). In some embodiments, the driving circuit 1 includes a plurality of driving units 11, each of which is electrically connected to a light emitting display device 2, each driving unit 11 including a display driving subunit 12 and a regulating subunit 13, according to The driving signal applied by the display data of the current display screen includes the scan signal Gn and the data signal Dn. The display driving sub-unit 12 includes the scan switch tube 1 and the drive switch tube T2. The step S71 specifically includes: outputting the scan signal Gn to the corresponding scan. Switching the tube T1 to control the scan switch tube T1 to be turned on, and outputting a data signal Dn to the turned-on scan switch tube T1 to transmit the data signal Dn to the Driving the switch tube T2, and controlling the conduction state and the conduction degree of the drive switch tube T2, so that the driving power source Vpos can apply a corresponding driving voltage to the light emitting display device 2 to control the corresponding light emission of the light emitting display device 2. .

A corresponding adjustment signal is applied to the drive circuit 1 according to display parameters of the display screen to control the drive circuit 1 to adjust the illumination of the corresponding light-emitting display device 2 (S73). The adjustment sub-unit 13 includes an adjustment switch tube T3 electrically connected between the driving power source Vpos and the corresponding light-emitting display device 2, and the display parameter includes gray-scale information, and the step S73 specifically includes: the processing unit 3 controls the corresponding adjustment subunit 13 / the adjustment switch T3 to adjust the illumination of the corresponding illumination display device 2 according to the gray scale information of the current display screen, and further adjusts the display screen so that Reduce display quality while saving energy. Further, the processing unit 3 controls the output of the adjustment signal En having the corresponding duty ratio to the adjustment sub-unit 13 according to the gray-scale information of the display screen to further change the driving of the driving power source Vpos to the light-emitting display device 2. The light emission of the light-emitting display device 2 is adjusted by voltage.

Please refer to FIG. 8 as a sub-flowchart in step S73 of FIG. 7 in an embodiment. The driving circuit 1 includes a plurality of driving units 11, each of which is electrically connected to a light-emitting display device 2, each of which includes a display driving sub-unit 12 and an adjusting sub-unit 13, and each of the regulators When the unit 13 includes the adjustment switch tube T3, as shown in FIG. 8, the step S73 includes the following steps.

The gray scale information of the entire current display screen is counted (S730). The grayscale information includes: grayscale distribution, grayscale brightness calculation color hue, saturation, and the like.

Determining the initial enable of the adjustment switch tube T3 of each drive unit 11 according to the gray scale information that is counted PWM (pulse width modulation signal) gain G1 of the signal (S732);

The initial enable signal E1 of the adjustment switch T3 of each drive unit 11 is combined with the corresponding PWM gain G1 to obtain an adjustment signal En (S734). The PWM gain G1 is expressed as a PWM signal, and the PWM gain G1 of the adjustment switch T3 of each driving unit 11 is combined with the corresponding initial enable signal E1 to obtain an adjustment signal En, including: The enable signal E1 is multiplied by the PWM gain G1 in the form of the PWM signal to obtain an adjustment signal En in the form of the PWM signal.

The adjustment signal En is applied to the corresponding adjustment switch tube T3, thereby adjusting the illumination of the corresponding light-emitting display device 2 (S736).

In some embodiments, the step S732 further includes: partitioning the current picture according to the grayscale information of the currently displayed picture to obtain a plurality of partitions F1 to Fn; determining a PWM gain G1 of each partition and each The range of coordinate values of the partitions; and determining the light-emitting display devices 2 corresponding to the respective partitions according to the range of coordinate values of each partition, and then determining the initial enable of the plurality of driving units 11 corresponding to the light-emitting display devices 2 in each of the partitions The PWM gain G1 of the signal is the PWM gain G1 of the corresponding partition, thereby obtaining the PWM gain G1 of the initial enable signal of the adjustment switch T3 of all the driving units 11.

In some embodiments, the step S734 further includes: combining the initial enable signal E1 of the adjustment switch T3 of the driving unit 11 corresponding to the light-emitting display device 2 in each partition with the PWM gain G1 of the corresponding partition to obtain each The adjustment signal En of the adjustment switch tube T3 of the drive unit 11 corresponding to the illumination display device 2 in the sub-region. That is, the adjustment signal En of the adjustment switch tube T3 of the drive unit 11 corresponding to the light-emitting display device 2 in the same partition is the same.

Wherein, determining the PWM gain G1 of each partition comprises: determining at least according to brightness and/or contrast of each partition, wherein the processor 3 determines that the higher the PWM brightness G1 is, the higher the brightness of a certain partition is. The lower the brightness of a certain partition, the lower the PWM gain G1 is determined; and/or the higher the contrast of a certain partition is, the higher the PWM gain G1 of the partition is determined. The lower the contrast of a certain partition, the lower the PWM gain G1 of the partition is determined.

In other embodiments, the step S732 further includes: the grayscale information of the current display screen is determined to determine the overall brightness and/or contrast of the current display image, and then according to the current display. The overall brightness and/or contrast of the face determines the overall PWM gain G1 of the currently displayed picture, and then the PWM gain G1 of the initial enable signal of the adjustment switch T3 of each drive unit 11 is determined to be the overall PWM gain G1.

Wherein, the higher the brightness of a certain display picture, the higher the PWM gain G1 is, the lower the brightness of a certain display picture is, the lower the PWM gain G1 is determined; and/or, on a certain display screen When the contrast is higher, it is determined that the higher the PWM gain G1 of the display screen is, the lower the contrast of a certain display screen is, the lower the PWM gain G1 of the display screen is determined.

Wherein, when a plurality of program instructions are stored in the memory 4, the program instructions are used by the processing unit 3 or the processor 32 to execute execution to perform the steps in any of the foregoing methods.

Therefore, in the display device 100 and the display driving method method of the present invention, in addition to driving display of the light-emitting display device 2 in accordance with display data, the display of the display screen is used to adjust the light emission of the light-emitting display device 2, Therefore, when the display quality of the display screen is maintained or improved, the energy consumption of the light-emitting display device 2 can be saved, the energy consumption of the light-emitting display device 2 as the main energy-consuming component can be reduced, and the endurance capability of the display device 100 can be greatly improved. .

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It is the scope of protection of the present invention.

Claims

A display device, comprising: a driving circuit, a plurality of light emitting display devices arranged in an array, and a processing unit, wherein the driving circuit is electrically connected to the plurality of light emitting display devices arranged in an array and a processing unit, And a driving signal for driving the corresponding light emitting display device to emit light according to the display data of the current display screen, wherein the processing unit is configured to control the driving circuit to adjust the light emission of the light emitting display device according to the display parameter of the display screen. .
The display device as claimed in claim 1 , wherein the driving circuit comprises a plurality of driving units, each driving unit corresponding to a light emitting display device, each driving unit comprising a display driving subunit and a regulating subunit, the processing unit And a plurality of driving units, configured to apply a corresponding driving signal to the corresponding display driving sub-unit according to the display data of the current display screen, to drive the corresponding light-emitting display device to emit light through the corresponding display driving sub-unit, The processing unit is further configured to control the corresponding adjustment sub-unit to adjust the illumination of the light-emitting display device according to the display parameter of the display screen.
The display device as claimed in claim 2, wherein the display driving subunit of each driving unit comprises a scan switch tube and a drive switch tube, wherein the drive switch tube is electrically connected to a driving power source, the scan switch tube, and Between the corresponding light-emitting display devices, the scan switch tube is further electrically connected to the processing unit, the adjustment sub-unit includes an adjustment switch tube, the adjustment switch tube is electrically connected to the driving power source and the corresponding light-emitting Display between devices.
The display device according to claim 3, wherein the display parameter is grayscale information of a current display screen, and the grayscale information includes at least a grayscale distribution, a grayscale transition luminance, a color hue, and a saturation degree. The processing unit controls the corresponding adjustment sub-unit to adjust the illumination of the corresponding illumination display device according to the gray scale information of the current display screen, and further adjusts the display screen.
The display device according to claim 4, wherein the processing unit controls outputting an adjustment signal having a corresponding duty ratio to the adjustment subunit according to gray scale information of the display screen to further change the driving power supply to The light emission of the display device is illuminated to adjust the illumination of the light emitting display device.
The display device according to claim 4, wherein said processing unit is based on current The grayscale information of the display screen controls the corresponding adjustment subunit to adjust the illumination of the corresponding illumination display device, including: the processing unit statistics the grayscale information of the entire current display screen; and determines the adjustment of each driving unit according to the statistical grayscale information. The PWM gain of the initial enable signal of the switch tube combines the initial enable signal of the adjustment switch tube of each drive unit with the corresponding PWM gain, and applies the adjustment signal to the corresponding adjustment switch tube, thereby adjusting the corresponding Illumination of the light-emitting display device.
The display device according to claim 6, wherein the processing unit determines, according to the statistical gray scale information, a PWM gain of an initial enable signal of the adjustment switch of each driving unit, including: the processing unit according to the statistics The grayscale information of the current display picture partitions the current picture to obtain a plurality of partitions; the processing unit determines the PWM gain of each partition and the range of coordinate values of each partition, and determines according to the range of coordinate values of each partition a light-emitting display device corresponding to each of the partitions, and then determining a PWM gain of an initial enable signal of the adjustment switch of the plurality of driving units corresponding to the light-emitting display devices in each of the partitions as a PWM gain of the corresponding partition, thereby The PWM gain of the initial enable signal of the regulating switch of all the drive units is obtained.
The display device according to claim 7, wherein the processing unit combines an initial enable signal of the adjustment switch of each drive unit with a corresponding PWM gain to obtain an adjustment signal, including: the processing unit will The initial enable signal of the adjustment switch of the corresponding driving unit of the light-emitting display device in the sub-region is combined with the PWM gain of the corresponding partition to obtain an adjustment signal of the adjustment switch of the driving unit corresponding to the light-emitting display device in each partition.
The display device according to claim 7, wherein said processing unit partitions said display screen according to at least brightness and/or contrast of a display screen, and determines each at least according to brightness and/or contrast of each partition The PWM gain of the partition.
The display device according to claim 6, wherein the processing unit determines the PWM gain of the initial enable signal of the adjustment switch of each driving unit according to the statistical gray scale information, including: the processing unit according to the The gray scale information of the current display screen of the statistics determines the overall brightness and/or contrast of the current display screen, and then determines the overall PWM gain of the current display screen according to the overall brightness and/or contrast of the current display screen, and then determines the adjustment switches of the respective driving units. The PWM gain of the initial enable signal of the tube is the overall PWM gain.
The display device according to claim 10, wherein the processing unit combines an initial enable signal of the adjustment switch of each drive unit with a corresponding PWM gain to obtain an adjustment signal. The method includes: when the current display screen is displayed, the processing unit combines an initial enable signal of the adjustment switch of each driving unit with a PWM gain of the display screen to obtain an adjustment signal of each adjustment switch.
A display driving method is applied to a display device, wherein the display device comprises a plurality of arrayed light emitting display devices and a driving circuit; and the display driving method comprises the steps of:

Applying a corresponding driving signal to the driving circuit according to the display data of the current display screen to drive the corresponding light emitting display device to emit light through the driving circuit;

A corresponding adjustment signal is applied to the driving circuit according to a display parameter of the display screen to control the driving circuit to adjust the illumination of the corresponding light emitting display device.
The display driving method according to claim 12, wherein the driving circuit comprises a plurality of driving units, each driving unit corresponding to a light emitting display device, each driving unit comprising a display driving subunit and a regulating subunit; The display parameter is grayscale information of the current display screen, and the grayscale information includes at least information such as grayscale distribution, grayscale brightness calculation color hue, saturation, and the step “applies a corresponding according to display parameters of the display screen. The adjusting signal to the driving circuit includes: applying a corresponding adjusting signal to the corresponding adjusting sub-unit according to the gray-scale information of the display screen to control the corresponding adjusting sub-unit to adjust the lighting of the corresponding light-emitting display device.
The display driving method according to claim 13, wherein each of the adjusting subunits comprises an adjusting switch tube, and the step of "applying a corresponding adjustment signal to the corresponding adjusting subunit according to the grayscale information of the display screen to control The corresponding adjustment subunit adjusts the illumination of the corresponding illuminating display device" including:

Counting grayscale information of the entire current display screen;

Determining, according to the gray scale information, the PWM gain of the initial enable signal of the adjustment switch of each driving unit;

Combining an initial enable signal of the adjustment switch of each drive unit with a corresponding PWM gain to obtain an adjustment signal;

The adjustment signal is applied to the corresponding adjustment switch tube to adjust the illumination of the corresponding illumination display device.
A display driving method according to claim 14, wherein said step "based on The statistical gray scale information determines the PWM gain of the initial enable signal of the adjustment switch of each drive unit" includes:

Obtaining a plurality of partitions according to the grayscale information of the currently displayed screen to partition the current screen;

Determining the PWM gain of each partition and the range of coordinate values of each partition, and determining the light-emitting display devices corresponding to the respective partitions according to the range of coordinate values of each partition, and then determining the corresponding corresponding to the light-emitting display devices in each partition The PWM gain of the initial enable signal of the adjustment switch of the drive unit is the PWM gain of the corresponding partition, thereby obtaining the PWM gain of the initial enable signal of the adjustment switch of all the drive units.
The display driving method according to claim 15, wherein the step of "combining the initial enable signal of the adjustment switch of each driving unit with the corresponding PWM gain to obtain an adjustment signal" includes:

The initial enable signal of the adjustment switch of the drive unit corresponding to the light-emitting display device in each partition is combined with the PWM gain of the corresponding partition to obtain an adjustment signal of the adjustment switch of the drive unit corresponding to the light-emitting display device in each partition.
The display driving method according to claim 16, wherein the step of "partitioning the current picture according to the grayscale information of the current display picture to obtain a plurality of partitions" includes: at least according to the brightness of the display screen / or contrast to partition the display screen;

The step of "determining the PWM gain of each partition" includes determining the PWM gain of each partition based at least on the brightness and/or contrast of the respective partitions.
The display driving method according to claim 15, wherein the step of "determining the PWM gain of the initial enable signal of the adjustment switch of each driving unit based on the statistical gray scale information" includes:

Determining an overall brightness and/or contrast of the current display screen according to the grayscale information of the currently displayed display screen;

The overall PWM gain of the current display picture is determined according to the overall brightness and/or contrast of the current display picture, and then the PWM gain of the initial enable signal of the adjustment switch of each drive unit is determined to be the overall PWM gain.
A display driving method according to claim 18, wherein said step "will each The initial enable signal of the adjustment switch of the driving unit is combined with the corresponding PWM gain to obtain an adjustment signal" including:

When the current display screen is displayed, the initial enable signal of the adjustment switch of each drive unit is combined with the PWM gain of the display screen to obtain adjustment signals of the respective adjustment switches.
The display driving method according to claim 19, wherein said adjustment switch tube is electrically connected between said driving power source and said corresponding light-emitting display device, said step "applying according to gray scale information of a display screen Corresponding adjustment signals are sent to the corresponding adjustment subunits to control the corresponding adjustment subunits to adjust the illumination of the corresponding illumination display device, including:

The adjustment signal having the corresponding duty ratio is output to the adjustment sub-unit according to the display parameter of the display screen, thereby further changing the driving voltage supplied from the driving power source to the light-emitting display device to adjust the light emission of the light-emitting display device.