Display driving device and display device

Abstract

The embodiment of the utility model provides a display driving device and a display device. The display driving device and the display device aim at giving consideration to the display effect and energy efficiency. The display driving device is applied to a display substrate, and the display driving device comprises a first driving unit which is configured to drive a second driving unit to drive the first driving unit to drive the second driving unit to drive the first driving unit to drive the second driving unit to drive the second driving unit to drive the second driving unit to drive the third driving unit to drive the third driving unit to drive the third driving unit to drive the third driving unit to drive the fourth driving unit to drive the fourth driving unit to drive the fourth driving unit to drive the alternately writing a first gamma voltage into the first color sub-pixel and writing a second gamma voltage into the second color sub-pixel line by line along the first direction; the second driving unit is configured to drive the display substrate to display the current display refresh rate within the time of one display frame under the condition that the current display refresh rate of the display substrate is not higher than a first preset refresh rate threshold value or the continuous preset frame number of the current display frame data is not changed; a first gamma voltage is alternately written to at least every two first color sub-pixels and a second gamma voltage is alternately written to at least every two second color sub-pixels in a first direction.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of display devices, and in particular to a display driving device and a display device. Background Art

[0002] With the popularization of portable electronic devices, the market has put forward further requirements for various aspects of electronic equipment performance, including battery life. In mobile terminal electronic devices, the energy consumption of the display screen is often an important factor affecting the battery life of electronic devices. The energy consumption of the display screen is closely related to many factors such as the material of the light-emitting element and the way of light-emitting display. For technicians, how to reduce the energy consumption of the display device while minimizing the negative impact on the display effect of the display device is a problem that still needs to be further solved or improved.

[0003] It should be noted that the information provided in the above background technology is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Utility Model Content

[0004] The embodiments of the present application provide a display driving device and a display device, which are intended to take into account both the driving effect and energy efficiency of the display driving device, so as to help further take into account both the display effect and energy efficiency of the display device.

[0005] In one aspect, an embodiment of the present application provides a display driving device, applied to a display substrate, the display substrate comprising: a plurality of sub-pixels arranged in an array, wherein any column of the sub-pixels arranged along a first direction comprises: a plurality of first color sub-pixels and a plurality of second color sub-pixels arranged alternately;

[0006] The display driving device is configured to write a gamma voltage into the sub-pixel to drive the sub-pixel to emit light; the gamma voltage includes: a first gamma voltage and a second gamma voltage; the display driving device includes:

[0007] a first driving unit, configured to, when a current display refresh rate of the display substrate is higher than a first preset refresh rate threshold and current display frame data changes, alternately write the first gamma voltage to the first color sub-pixels in a column of the sub-pixels and write the second gamma voltage to the second color sub-pixels in the column of the sub-pixels row by row along the first direction within a display frame;

[0008] The second driving unit is configured to, when a current display refresh rate of the display substrate is not higher than the first preset refresh rate threshold or the current display frame data remains unchanged for a preset number of consecutive frames, alternately write the first gamma voltage row by row to at least every two first color sub-pixels in a column of the sub-pixels and write the second gamma voltage row by row to at least every two second color sub-pixels in the column of the sub-pixels along the first direction within a display frame.

[0009] Optionally, the frequency at which the second driving unit alternately writes the first gamma voltage to the first color sub-pixel and writes the second gamma voltage to the second color sub-pixel is positively correlated with the current display refresh rate; and / or,

[0010] The number of rows in which the second driving unit alternately writes the first gamma voltage to the first color sub-pixel or writes the second gamma voltage to the second color sub-pixel is negatively correlated with the current display refresh rate.

[0011] Optionally, any column of the sub-pixels arranged along the first direction further includes: a plurality of third color sub-pixels, arranged alternately with the plurality of first color sub-pixels and the plurality of second color sub-pixels; the gamma voltage further includes: a third gamma voltage;

[0012] The first driving unit is further configured to, when a current display refresh rate of the display substrate is higher than a first preset refresh rate threshold and current display frame data changes, alternately write the first gamma voltage to the first color sub-pixels in a column of the sub-pixels, write the second gamma voltage to the second color sub-pixels in the column of sub-pixels, and write the third gamma voltage to the third color sub-pixels in the column of sub-pixels row by row within a display frame time along the first direction;

[0013] The second driving unit is further configured to, when a current display refresh rate of the display substrate is not higher than the first preset refresh rate threshold or the current display frame data remains unchanged for a preset number of consecutive frames, alternately write the first gamma voltage row by row to at least every two first color sub-pixels in a column of the sub-pixels, write the second gamma voltage row by row to at least every two second color sub-pixels in the column of sub-pixels, and write the third gamma voltage row by row to at least every two third color sub-pixels in the column of sub-pixels along the first direction within a display frame.

[0014] Optionally, the sub-pixel further includes: a plurality of third color sub-pixels; in any row of the sub-pixels arranged along the second direction, the first color sub-pixels, the second color sub-pixels and the third color sub-pixels are arranged alternately; the second direction intersects the first direction; the gamma voltage further includes: a third gamma voltage;

[0015] The display driving device further includes:

[0016] The third driving unit is configured to write the third gamma voltage to the third color sub-pixel within a display frame.

[0017] Optionally, the light emitting color of the first color sub-pixel may include red, the light emitting color of the second color sub-pixel may include blue, and the light emitting color of the third color sub-pixel may include green.

[0018] Optionally, it also includes:

[0019] The first detection unit is configured to obtain a current display refresh rate of the display substrate, and detect whether the current display refresh rate is higher than the first preset refresh rate threshold.

[0020] Optionally, it also includes:

[0021] A second detection unit is configured to obtain the current display frame data;

[0022] a processing unit configured to reduce the current display refresh rate of the display substrate to no higher than the second preset refresh rate threshold value when the current display frame data has a continuous preset number of frames unchanged, until the current display frame data changes;

[0023] Among them, the second preset refresh rate threshold is smaller than the first preset refresh rate threshold.

[0024] Optionally, the first preset refresh rate threshold is equal to 1 / 2 of the maximum display refresh rate of the display substrate.

[0025] Optionally, the second driving unit is further configured to, when the current display refresh rate of the display substrate is lower than the second preset refresh rate threshold or the current display frame data remains unchanged for a preset number of consecutive frames, successively perform one of the following within a display frame: write the first gamma voltage row by row to all the first color sub-pixels in a column of the sub-pixels, and write the second gamma voltage row by row to all the second color sub-pixels in the column of the sub-pixels;

[0026] Among them, the second preset refresh rate threshold is smaller than the first preset refresh rate threshold.

[0027] Optionally, the display substrate further comprises: a plurality of transistor switches corresponding one-to-one to the plurality of sub-pixels; the display driving device further comprises: a GOA driving circuit;

[0028] The GOA driving circuit comprises: a first sub-circuit and a second sub-circuit;

[0029] The first sub-circuit is electrically connected to the odd-numbered rows of sub-pixels arranged along the first direction, and is configured to control the on or off of transistor switches of the odd-numbered rows of sub-pixels according to a control instruction of the display driving device;

[0030] The second sub-circuit is electrically connected to the even-numbered rows of sub-pixels arranged along the first direction, and is configured to control the on or off of transistor switches of the even-numbered rows of sub-pixels according to a control instruction of the display driving device.

[0031] The display driving device provided in the embodiment of the present application has the following advantages:

[0032] Through the above embodiments, on the one hand, when the display substrate displays dynamic images and displays at a high refresh rate, the sub-pixels are scanned row by row to avoid the display device from having a tearing sensation when displaying a high dynamic image at a high refresh rate, thereby effectively ensuring the display effect of the display device. On the other hand, when the display substrate displays static images or displays at a low refresh rate, the sub-pixels are scanned across rows in conjunction with the gamma voltage required by the sub-pixels. This can effectively avoid the display driver chip from frequently switching the gamma voltages required for sub-pixels of different colors while minimizing the occurrence of tearing display images that can be captured by the human eye. Since there is a voltage difference between different gamma voltages, reducing the voltage switching frequency helps to reduce the analog power consumption of the display driver chip, and can also ensure sufficient voltage compensation time under high energy efficiency, which in turn helps to further reduce the energy consumption of the display device.

[0033] On the other hand, an embodiment of the present application further provides a display device, including: a display substrate and a display driving device as in any of the above embodiments.

[0034] The display device provided in the embodiments of the present application includes the display driving device in any one of the above embodiments, and also has all the advantages of the above display driving devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings are for reference and illustration only and are not intended to limit the scope of protection of this application. The technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0036] Figure 1 A structural block diagram of a display driving device in an embodiment provided by the present application is shown.

[0037] Figure 2 A schematic diagram of a pixel array of a display substrate in an embodiment provided by the present application is shown.

[0038] Figure 3 A driving schematic diagram of a display substrate in an embodiment provided in the present application is shown.

[0039] Figure 4 A schematic diagram of a pixel array of a display substrate in yet another embodiment provided in the present application is shown.

[0040] Figure 5 A structural block diagram of a display driving device in another embodiment provided by the present application is shown.

[0041] Figure 6 A structural block diagram of a display driving device in another embodiment provided by the present application is shown.

[0042] Figure 7 A structural block diagram of a display driving device in another embodiment provided by the present application is shown.

[0043] Figure 8 A driving timing diagram in an embodiment provided by the present application is shown.

[0044] Fig. 9 A driving timing diagram in another embodiment provided in the present application is shown. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] Organic light-emitting diode (OLED) display devices use organic light-emitting materials as light-emitting sub-pixels to achieve luminous display of images, and have the advantages of low power consumption, high brightness and high response speed. Low-temperature polysilicon oxide thin-film transistor (LTPO TFT) technology is an emerging thin-film transistor technology in recent years. Theoretically, LTPO TFT can dynamically adjust different display refresh rates according to different screen application scenarios or user needs. Compared with traditional low-temperature polysilicon thin-film transistor (LTPS TFT) technology, it can further save energy consumption of the display screen.

[0047] The driving mode of the display device also affects the power consumption. As the resolution of the display device increases, the number of source channels of the data driver in the display device will increase, thereby increasing the manufacturing cost. In order to reduce the manufacturing cost, the related art proposes a demultiplexing driving scheme or a demux driving scheme, wherein each source channel of the data driver in the demultiplexing driving scheme can drive two or more sub-pixel columns. In a display device adopting a demultiplexing driving scheme, since each source channel drives two or more sub-pixel columns in a time-division manner, it may not be possible to ensure sufficient threshold voltage compensation time to compensate for the threshold voltage of the driving transistor included in each sub-pixel, making it difficult to take into account both the energy efficiency and the display effect of the display device.

[0048] The inventors also found that when the current display driver uses the GOA drive circuit to scan and drive the sub-pixels, if the sub-pixels are scanned row by row, the gamma voltage required by the sub-pixels of different colors will be different, causing the display driver chip (DDIC) to frequently switch the output gamma voltage, resulting in high analog power consumption of the chip, which is not conducive to reducing the power consumption of the display screen. However, if the sub-pixels are not scanned in row order, it will easily cause tearing of the display screen in the human eye's perception, and it is also difficult to take into account the energy efficiency and display effect of the display device.

[0049] Current portable terminal devices, such as mobile phones and smart watches, have a strong demand for reducing device power consumption. To this end, considering that current OLED display screens can dynamically adjust the display refresh rate, the inventor further proposes to provide different scanning drive modes for different display refresh rates or dynamic and static display images, thereby reducing the analog power consumption of the display driver chip, and then reducing the energy consumption of the display screen and the terminal device.

[0050] In view of the consideration and analysis of the above problems, the embodiment of the present application proposes a display driver device and a display device. On the one hand, when the display substrate performs dynamic picture display and high refresh rate display, the sub-pixel is scanned row by row, so as to avoid the screen tearing when the display device displays high dynamic pictures, thereby effectively ensuring the display effect of the display device. On the other hand, when the display substrate performs static picture display or low refresh rate display, the sub-pixel is scanned across rows in accordance with the gamma voltage required by each row of sub-pixels. In this way, the display driver chip can be effectively prevented from frequently switching the gamma voltage required for sub-pixels of different colors without causing the tearing display picture captured by the human eye. Since there is a voltage difference between different gamma voltages, reducing the switching frequency of the voltage helps to reduce the analog power consumption of the display driver chip, and can also ensure sufficient voltage compensation time under high energy efficiency, which helps to further reduce the energy consumption of the display device. In this way, the display effect and energy efficiency of the display device are taken into consideration.

[0051] The embodiments of the present application are described below with reference to the accompanying drawings.

[0052] Figure 1 FIG. 2 shows a structural block diagram of a display driving device 300 in an embodiment provided by the present application. Figure 1 As shown, an embodiment of the present application provides a display driving device 300 applied to a display substrate.

[0053] Figure 2 FIG. 4 shows a schematic diagram of a pixel array of a display substrate 400 in an embodiment provided by the present application. Figure 2 As shown, the display substrate 400 includes: a plurality of sub-pixels arranged in an array, and any column of sub-pixels arranged along a first direction includes: a plurality of first color sub-pixels 401 and a plurality of second color sub-pixels 402 arranged alternately.

[0054] In some optional embodiments, the display driving device 300 can be applied to an OLED display substrate. Accordingly, the sub-pixel can include an organic light-emitting sub-pixel. The light-emitting colors of the first color sub-pixel 401 and the second color sub-pixel 402 can be any two of red, green and blue (RGB).

[0055] Figure 3 FIG. 4 shows a driving schematic diagram of a display substrate 400 in an embodiment provided by the present application. Figure 3 As shown, in some optional embodiments, the display substrate 400 may include a plurality of data lines DT (in Figure 3 / 8 / 9 are represented by DT1, DT2, etc., the same below) and multiple gate lines GT (in Figure 3 / 8 / 9 are represented by GT1, GT2, ..., the same below), the multiple data lines DT and the multiple gate lines GT are insulated and overlapped with each other, and the multiple data lines DT and the multiple gate lines GT can enclose a plurality of pixel units, so that sub-pixels can be set in the pixel units.

[0056] The display driving device 300 is configured to write a gamma voltage into a sub-pixel to drive the sub-pixel to emit light.

[0057] like Figure 3 As shown, in some optional implementations, the display driving device 300 may include a display driving chip (not shown) and / or a GOA driving circuit, wherein the GOA driving circuit may also be referred to as a GOA circuit.

[0058] The gamma voltage may also be called a data voltage. The display driving device 300 may use any gate line GT to control transistor switches corresponding to a row of sub-pixels arranged along the second direction, and cooperate with any data line DT to write a gamma voltage to sub-pixels in a column of sub-pixels arranged along the first direction, thereby writing corresponding gamma voltages to sub-pixels of different luminous colors, so that each sub-pixel emits light.

[0059] The gamma voltages include a first gamma voltage and a second gamma voltage.

[0060] The first gamma voltage may be a data voltage that enables the first color sub-pixel 401 to emit light according to a set light intensity, and the second gamma voltage may be a data voltage that enables the second color sub-pixel 402 to emit light according to a set light intensity. Specifically, by adjusting the magnitude of the gamma voltage, the light intensity of the sub-pixel can be adjusted.

[0061] like Figure 1 As shown, the display driving device 300 includes: a first driving unit 310 and a second driving unit 310 .

[0062] The first driving unit 310 is configured to, when the current display refresh rate of the display substrate 400 is higher than the first preset refresh rate threshold and the current display frame data changes, alternately write a first gamma voltage to the first color sub-pixel 401 in a column of sub-pixels and a second gamma voltage to the second color sub-pixel 402 in the column of sub-pixels row by row along a first direction within a display frame.

[0063] Wherein, under the control of the first driving unit 310 , the GOA driving circuit can scan and drive the display substrate 400 with every 2 rows of sub-pixels arranged along the first direction as a cycle.

[0064] In some optional implementations, the first preset refresh rate threshold is equal to 1 / 2 of the maximum display refresh rate of the display substrate 400 .

[0065] In an optional example, the maximum display refresh rate of the display substrate 400 may be 120 Hz, and the first preset refresh rate threshold may be 60 Hz.

[0066] The second driving unit 320 is configured to, when the current display refresh rate of the display substrate 400 is not higher than the first preset refresh rate threshold or the current display frame data remains unchanged for a preset number of consecutive frames, alternately write the first gamma voltage row by row to at least every two first color sub-pixels 401 in a column of sub-pixels and write the second gamma voltage row by row to at least every two second color sub-pixels 402 in the column of sub-pixels along the first direction within a display frame.

[0067] To facilitate periodic driving of sub-pixels, along the first direction, the second driving unit 320 controls the number of rows of first color sub-pixels 401 to which the first gamma voltage is written each time to be equal to the number of rows of second color sub-pixels 402 to which the second gamma voltage is written each time.

[0068] Exemplarily, the second driving unit 320 controls the number of rows of the first color sub-pixels 401 to which the first gamma voltage is written each time to be 2, 3, 4..., and the number of rows of the second color sub-pixels 402 to which the second gamma voltage is written each time can also be 2, 3, 4... Then, under the control of the second driving unit 320, the GOA driving circuit can scan and drive the display substrate 400 with 4, 6, 8... rows of first color sub-pixels 401 and second color sub-pixels 402 arranged along the first direction as a period.

[0069] Through the above embodiments, on the one hand, when the display substrate displays dynamic images and displays at a high refresh rate, the GOA driving circuit can be used to perform line-by-line scanning of sub-pixels of different colors, so as to avoid the display device from having a sense of screen tearing when displaying high dynamic images, thereby effectively ensuring the display effect of the display device. On the other hand, when the display substrate displays static images or displays at a low refresh rate, the GOA driving circuit can be used to perform multi-line synchronous scanning, which can effectively avoid the display driver chip from frequently switching the gamma voltages required for sub-pixels of different colors without the occurrence of tearing display images captured by the human eye. Since there is a voltage difference between different gamma voltages, reducing the voltage switching frequency helps to reduce the analog power consumption of the display driver chip, which in turn helps to further reduce the energy consumption of the display device.

[0070] Figure 8 FIG. 2 shows a driving timing diagram of an embodiment provided by the present application. Figure 3 and Figure 8As shown, in an example provided in the present application, for a display substrate provided with 1920 rows of sub-pixels, when the current display refresh rate of the display substrate is higher than the first preset refresh rate threshold and the current display frame data changes, within the time of a display frame, the GOA circuit scans row by row, and the gate lines GT1 to GT1920 turn on the transistor switches in sequence. Under the joint action of the data voltage terminal FT and the data selection line MUX, any of the odd-numbered data lines DT1, DT3, ... arranged along the second direction alternately provides a gamma voltage corresponding to the sub-pixel according to the time of row-by-row scanning. Exemplarily, any of the odd-numbered data lines DT1, DT3, ... arranged along the second direction alternately provides a first gamma voltage ( Figure 8 or Fig. 9 01 in the figure) and the second gamma voltage ( Figure 8 or Fig. 9 The even-numbered data lines DT2, DT4, etc. arranged along the second direction provide a third gamma voltage ( Figure 8 or Fig. 9 03 in the figure).

[0071] Fig. 9 FIG. 2 shows a driving timing diagram in another embodiment provided by the present application. Figure 3 and Fig. 9 As shown, in an example provided in the present application, for a display substrate provided with 1920 rows of sub-pixels, when the current display refresh rate of the display substrate is not higher than the first preset refresh rate threshold or the current display frame data is continuously preset for a constant number of frames, within the time of a display frame, the GOA circuit first scans all odd-numbered rows of sub-pixels line by line in the first half frame, and the odd-numbered row gate lines GT1, GT3, ... to GT1919 turn on the transistor switches in sequence, and then scans all even-numbered rows of sub-pixels line by line in the second half frame, and the even-numbered row gate lines GT2, GT4, to GT1920 turn on the transistor switches in sequence. Under the joint action of the data voltage terminal FT and the data selection line MUX, any data line of the odd-numbered column data lines DT1, DT3, ... arranged along the second direction provides a gamma voltage corresponding to the sub-pixel in the first half frame, and provides another gamma voltage corresponding to the sub-pixel in the second half frame. Exemplarily, starting from the data line DT1, any data line arranged along the second direction with four columns as one period, including the data line DT1, first provides the first gamma voltage, and then provides the second gamma voltage, for example, jumping from the red gamma voltage to the blue gamma voltage. Starting from the data line DT3, any data line arranged along the second direction with four columns as one period, including the data line DT3, first provides the second gamma voltage, and then provides the first gamma voltage. Any data line of the even-numbered data lines DT2, DT4, ... arranged along the second direction provides the third gamma voltage.

[0072] Figure 8 The driving timing in can avoid the tearing feeling of dynamic display screen with high refresh rate. Figure 8 The drive timing in Fig. 9 The driving timing shown can not only reduce the hopping frequency of the data selection terminal connected to the data selection line MUX, but also reduce the hopping frequency of the data voltage terminal FT, which can be applied to low refresh rate or static display images, thereby effectively reducing the analog power consumption of the display driver chip.

[0073] In some optional embodiments, the higher the display refresh rate, the stronger the corresponding display screen dynamics, and the increase in the GOA shift period is more likely to cause a sense of screen tearing visible to the human eye. To this end, in an optional embodiment, the present application also provides a display driver device 300, wherein the frequency of alternating writing of the first gamma voltage to the first color sub-pixel 401 and the second gamma voltage to the second color sub-pixel 402 by the first driver unit 310 or the second driver unit 320 is positively correlated with the current display refresh rate.

[0074] And / or, the number of rows at which the first driving unit 310 or the second driving unit 320 alternately writes the first gamma voltage to the first color sub-pixel 401 or the second gamma voltage to the second color sub-pixel 402 is negatively correlated with the current display refresh rate.

[0075] For example, assuming that the display substrate is provided with 1920 rows of sub-pixels along the first direction, when the current display refresh rate is 60 Hz, the second driving unit 320 progressively scans 2 rows of first color sub-pixels 401 and 2 rows of second color sub-pixels 402 along the first direction at a time, and the alternating frequency is 480 times per frame. When the current display refresh rate is 30 Hz, the second driving unit 320 can progressively scan 4 rows of first color sub-pixels 401 and 4 rows of second color sub-pixels 402 along the first direction at a time, and the alternating frequency is 240 times per frame.

[0076] In the embodiment of the present application, the frequency of writing the first gamma voltage to the first color sub-pixel 401 and the second gamma voltage to the second color sub-pixel 402 alternately may not only be related to the display refresh rate, but may also be related to the number of the first color sub-pixels 401 and the second color sub-pixels 402 in a column of sub-pixels along the first direction. Assume that along the first direction, the display substrate has a preset number of rows of first color sub-pixels 401 and second color sub-pixels 402. In some optional embodiments, when the current display refresh rate of the display substrate 400 is higher than the first preset refresh rate threshold, the frequency of writing the first gamma voltage to the first color sub-pixel 401 and the second gamma voltage to the second color sub-pixel 402 alternately by the first driving unit 310 may be equal to half of the product of the current display refresh rate and the preset number of rows.

[0077] In some optional implementations, the purpose of changing the scanning timing of each row of sub-pixels can be achieved by adjusting the timing position of the start signal (STV) and / or the clock signal (CLK) period and adjusting the shift period of the odd and even rows GOA.

[0078] For example, the shift period of the GOA for odd / even rows can be set to 2 row times respectively, so that the sub-pixels in the odd / even rows can be refreshed in sequence. The shift period of the GOA for odd / even rows can also be adjusted to 1 row time, so that the odd rows are refreshed first and the even rows are refreshed later.

[0079] Figure 4 FIG. 4 shows a schematic diagram of a pixel array of a display substrate 400 in another embodiment provided by the present application. Figure 4 As shown, in some optional implementations, the present application considers setting the RGB arrangement along the first direction, so that the display driver 300 can dynamically adjust the number of GOA scanning lines and the gamma voltage switching frequency of the three sub-pixels according to the dynamic and static state or refresh rate of the display screen. To this end, in an optional implementation, the present application also provides a display driver 300, such as Figure 4 As shown, any column of sub-pixels arranged along the first direction further includes: a plurality of third color sub-pixels 403, which are arranged alternately with the plurality of first color sub-pixels 401 and the plurality of second color sub-pixels 402. The gamma voltage further includes: a third gamma voltage.

[0080] Combination Figure 1As shown, the first driving unit 310 is also configured to, when the current display refresh rate of the display substrate 400 is higher than the first preset refresh rate threshold and the current display frame data changes, alternately write the first gamma voltage to the first color sub-pixel 401 in a column of sub-pixels, write the second gamma voltage to the second color sub-pixel 402 in the column of sub-pixels, and write the third gamma voltage to the third color sub-pixel 403 in the column of sub-pixels row by row along the first direction within the time of one display frame.

[0081] The second driving unit 320 is further configured to, when the current display refresh rate of the display substrate 400 is not higher than the first preset refresh rate threshold or the current display frame data remains unchanged for a preset number of consecutive frames, alternately write the first gamma voltage row by row to at least every two first color sub-pixels 401 in a column of sub-pixels, write the second gamma voltage row by row to at least every two second color sub-pixels 402 in the column of sub-pixels, and write the third gamma voltage row by row to at least every two third color sub-pixels 403 in the column of sub-pixels in a first direction within the time of one display frame.

[0082] The first gamma voltage may be a data voltage that enables the third color sub-pixel 403 to emit light according to a set light intensity.

[0083] In some optional implementations, the present application considers setting the RGB arrangement along the second direction, and the second direction intersects with the first direction. Therefore, the display driver device 300 can dynamically adjust the number of GOA scanning lines and the switching frequency of the gamma voltage of the two sub-pixels according to the dynamic and static state or refresh rate of the display screen, thereby further reducing the analog power consumption of the display driver chip. To this end, in an optional implementation, the present application also provides a display driver device 300, Figure 5 FIG. 2 shows a structural block diagram of a display driving device in another embodiment provided by the present application. Figure 2 and Figure 5 As shown, the sub-pixels further include: a plurality of third color sub-pixels 403. In any row of sub-pixels arranged along the second direction, the first color sub-pixels 401, the second color sub-pixels 402 and the third color sub-pixels 403 are arranged alternately. The second direction intersects the first direction. The gamma voltage further includes: a third gamma voltage.

[0084] The display driving device 300 further includes:

[0085] The third driving unit 330 is configured to write a third gamma voltage to the third color sub-pixel 403 within a display frame.

[0086] In order to facilitate the GOA driving circuit to implement row-by-row scanning along the first direction, in some optional embodiments, the number of rows of the third gamma voltage written to the third color sub-pixel 403 by the third driving unit 330 each time is the same as the number of rows of the first gamma voltage written to the first color sub-pixel 401 each time or the number of rows of the second gamma voltage written to the second color sub-pixel 402 each time.

[0087] Exemplarily, assuming that the third color sub-pixel 403 is arranged in the same row as the first color sub-pixel 401 along the second direction, when the first color sub-pixel 401 is scanned and the first gamma voltage is written, the third color sub-pixel 403 is also synchronously scanned and the third gamma voltage is written. Assuming that the third color sub-pixel 403 is arranged in the same row as the second color sub-pixel 402 along the second direction, when the second color sub-pixel 402 is scanned and the second gamma voltage is written, the third color sub-pixel 403 is also synchronously scanned and the third gamma voltage is written.

[0088] In order to realize RGB combined light emission, in an optional implementation, the light emission colors of the first color sub-pixel 401 , the second color sub-pixel 402 , and the third color sub-pixel 403 may include: red, green, and blue.

[0089] In an optional implementation, the luminous color of the first color sub-pixel 401 may include red, the luminous color of the second color sub-pixel 402 may include blue, and the luminous color of the third color sub-pixel 403 may include green.

[0090] Figure 6 FIG. 2 shows a structural block diagram of a display driving device 300 in another embodiment provided by the present application. Figure 6 As shown, the present application also considers that the display driver device 300 detects and determines the current display refresh rate of the display substrate 400. To this end, in an optional implementation, the present application also provides a display driver device 300, further comprising:

[0091] The first detection unit 341 is configured to obtain a current display refresh rate of the display substrate 400 and detect whether the current display refresh rate is higher than a first preset refresh rate threshold.

[0092] Figure 7 FIG. 2 shows a structural block diagram of a display driving device 300 in another embodiment provided by the present application. Figure 7As shown, the embodiment of the present application can not only directly judge the dynamic and static state of the display screen according to whether the current display frame data changes, thereby selecting the number of alternating rows driven by the GOA scan, but also consider that the display driver device 300 dynamically adjusts the display refresh rate according to whether the display frame data changes, so as to further reduce the energy consumption of the display device. To this end, in an optional implementation, the present application also provides a display driver device 300, further comprising:

[0093] The second detection unit 342 is configured to obtain current display frame data.

[0094] The processing unit 350 is configured to reduce the current display refresh rate of the display substrate 400 to no higher than a second preset refresh rate threshold when the current display frame data has a continuous preset number of frames unchanged, until the current display frame data changes;

[0095] Among them, the second preset refresh rate threshold is smaller than the first preset refresh rate threshold.

[0096] Exemplarily, the preset number of frames may be 10 frames, the second preset refresh rate threshold may be 30 Hz, and the first preset refresh rate threshold may be 60 Hz.

[0097] Under more extreme display conditions, such as when the display substrate displays a static image or the display refresh rate is low enough, the possibility of screen tearing is further reduced. The embodiment of the present application also considers scanning the second color sub-pixels 402 after scanning any column of first color sub-pixels 401 arranged along the first direction, or scanning the first color sub-pixels 401 after scanning any column of second color sub-pixels 402 arranged along the first direction. To this end, in an optional embodiment, the present application also provides a display driving device 300, wherein the second driving unit 320 is further configured to, when the current display refresh rate of the display substrate 400 is lower than the second preset refresh rate threshold or the current display frame data has a constant number of consecutive preset frames, successively perform one of the following within a display frame: write the first gamma voltage row by row to all the first color sub-pixels 401 in a column of sub-pixels, and write the second gamma voltage row by row to all the second color sub-pixels 402 in the column of sub-pixels.

[0098] Among them, the second preset refresh rate threshold is smaller than the first preset refresh rate threshold.

[0099] Exemplarily, the second preset refresh rate threshold may be 10 Hz.

[0100] When the current display refresh rate of the display substrate 400 is lower than the second preset refresh rate threshold, the first driving unit 310 may alternately write the first gamma voltage to the first color sub-pixel 401 and the second gamma voltage to the second color sub-pixel 402 at a frequency equal to the current display refresh rate. That is, the alternation is performed only once in each display frame, thereby minimizing the analog power consumption of the display driving chip.

[0101] like Figure 3 As shown, the embodiment of the present application considers using a GOA driving circuit to realize row scanning. To this end, in some optional implementations, the present application also provides a display driving device 300, wherein the display substrate 400 further includes: a plurality of transistor switches corresponding to a plurality of sub-pixels one by one. The display driving device 300 also includes: a GOA driving circuit.

[0102] The GOA driving circuit includes: a first sub-circuit G1 and a second sub-circuit G2.

[0103] The first sub-circuit G1 or the second sub-circuit G2 may be a cascade circuit.

[0104] The first sub-circuit G1 is electrically connected to the odd-numbered rows of sub-pixels arranged along the first direction, and is configured to control the on or off of transistor switches of the odd-numbered rows of sub-pixels according to a control instruction of the display driving device 300 .

[0105] The second sub-circuit G2 is electrically connected to the even-numbered rows of sub-pixels arranged along the first direction, and is configured to control the on or off of transistor switches of the even-numbered rows of sub-pixels according to a control instruction of the display driving device 300 .

[0106] Through the above embodiments, the display driver provided by the present application adjusts the GOA drive signal. Under the condition of high refresh frequency, each display frame only drives sub-pixels of one color in the first half frame or the second half frame, and the GOA is driven sequentially. Under the condition of low refresh frequency, the GOA is driven alternately. This can reduce the analog power consumption of the driver IC at low refresh frequency, and ensure that there is no visible tearing feeling when displaying dynamic images at high refresh rate, thereby maximizing the display effect and energy efficiency of the display device.

[0107] Based on the same concept, the present application also provides a display device, including: a display substrate 400 and a display driving device 300 as in any of the above embodiments.

[0108] Exemplarily, the display device may include a foldable mobile phone, a tablet computer, etc.

[0109] Based on the same concept, an embodiment of the present application further provides an electronic device, the electronic device comprising: the display device in any one of the above embodiments.

[0110] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0111] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0112] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0113] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0114] In this application, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or terminal device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or terminal device including the element.

[0115] In the description of this application, unless otherwise specified, "plurality" means two or more than two. Unless otherwise specified, "about", "approximately", "roughly" and the like are not absolute definitions and express values ​​within ±10% of a reference value.

[0116] It should be noted that, in the embodiments of the present application, words such as "exemplarily" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplarily" or "for example" is intended to present related concepts in a specific way.

[0117] In the description of this application, unless otherwise specified, "same layer" means that two or more defined objects are in the same layer position in a stacking relationship, or are completely or partially in the same horizontal plane in the thickness direction of the stacking relationship.

[0118] The terms "and / or" and "and / or" in this article are merely a way to describe the association relationship of associated objects, indicating that three possible relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0119] Finally, it should be noted that specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the technical solution and its core ideas of the present application. Although the preferred embodiments of the present application have been described, once the technical personnel in the field know the basic creative concepts, they can make additional changes and modifications to these embodiments. Therefore, the attached claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present application.

Claims

1. A display driving device, characterized in that: Applied to a display substrate, the display substrate comprises: a plurality of sub-pixels arranged in an array, and any column of the sub-pixels arranged along a first direction comprises: a plurality of first color sub-pixels and a plurality of second color sub-pixels arranged alternately; The display driving device is configured to write a gamma voltage into the sub-pixel to drive the sub-pixel to emit light; the gamma voltage includes: a first gamma voltage and a second gamma voltage; the display driving device includes: a first driving unit, configured to, when a current display refresh rate of the display substrate is higher than a first preset refresh rate threshold and current display frame data changes, alternately write the first gamma voltage to the first color sub-pixels in a column of the sub-pixels and write the second gamma voltage to the second color sub-pixels in the column of the sub-pixels row by row along the first direction within a display frame; The second driving unit is configured to, when a current display refresh rate of the display substrate is not higher than the first preset refresh rate threshold or the current display frame data remains unchanged for a preset number of consecutive frames, alternately write the first gamma voltage row by row to at least every two first color sub-pixels in a column of the sub-pixels and write the second gamma voltage row by row to at least every two second color sub-pixels in the column of the sub-pixels along the first direction within a display frame.

2. The display driving device according to claim 1, characterized in that: The frequency at which the second driving unit alternately writes the first gamma voltage to the first color sub-pixels in a column of the sub-pixels and writes the second gamma voltage to the second color sub-pixels in the column of sub-pixels is positively correlated with the current display refresh rate; and / or, The number of rows in which the second driving unit alternately writes the first gamma voltage to the first color sub-pixels in a column of sub-pixels or writes the second gamma voltage to the second color sub-pixels in the column of sub-pixels is negatively correlated with the current display refresh rate.

3. The display driving device according to claim 1, characterized in that: Any column of the sub-pixels arranged along the first direction further includes: a plurality of third color sub-pixels, arranged alternately with the plurality of first color sub-pixels and the plurality of second color sub-pixels; the gamma voltage further includes: a third gamma voltage; The first driving unit is further configured to, when a current display refresh rate of the display substrate is higher than a first preset refresh rate threshold and current display frame data changes, alternately write the first gamma voltage to the first color sub-pixels in a column of the sub-pixels, write the second gamma voltage to the second color sub-pixels in the column of sub-pixels, and write the third gamma voltage to the third color sub-pixels in the column of sub-pixels row by row within a display frame time along the first direction; The second driving unit is further configured to, when a current display refresh rate of the display substrate is not higher than the first preset refresh rate threshold or the current display frame data remains unchanged for a preset number of consecutive frames, alternately write the first gamma voltage row by row to at least every two first color sub-pixels in a column of the sub-pixels, write the second gamma voltage row by row to at least every two second color sub-pixels in the column of sub-pixels, and write the third gamma voltage row by row to at least every two third color sub-pixels in the column of sub-pixels along the first direction within a display frame.

4. The display driving device according to claim 1, characterized in that: The sub-pixels further include: a plurality of third color sub-pixels; in any row of the sub-pixels arranged along the second direction, the first color sub-pixels, the second color sub-pixels and the third color sub-pixels are arranged alternately; the second direction intersects the first direction; the gamma voltage further includes: a third gamma voltage; The display driving device further includes: The third driving unit is configured to write the third gamma voltage to the third color sub-pixel within a display frame.

5. The display driving device according to claim 4, characterized in that: The light-emitting color of the first color sub-pixel includes red, the light-emitting color of the second color sub-pixel includes blue, and the light-emitting color of the third color sub-pixel includes green.

6. The display driving device according to claim 1, characterized in that: Also includes: The first detection unit is configured to obtain a current display refresh rate of the display substrate, and detect whether the current display refresh rate is higher than the first preset refresh rate threshold.

7. The display driving device according to claim 1, characterized in that: Also includes: A second detection unit is configured to obtain the current display frame data; a processing unit configured to reduce the current display refresh rate of the display substrate to no higher than a second preset refresh rate threshold value when the current display frame data has a continuous preset number of frames unchanged, until the current display frame data changes; Among them, the second preset refresh rate threshold is smaller than the first preset refresh rate threshold.

8. The display driving device according to claim 1, characterized in that: The first preset refresh rate threshold is equal to 1 / 2 of the maximum display refresh rate of the display substrate.

9. The display driving device according to any one of claims 1 to 8, characterized in that: The second driving unit is further configured to, when a current display refresh rate of the display substrate is lower than a second preset refresh rate threshold or the current display frame data remains unchanged for a preset number of consecutive frames, successively perform one of the following within a display frame: write the first gamma voltage row by row to all the first color sub-pixels in a column of sub-pixels, and write the second gamma voltage row by row to all the second color sub-pixels in the column of sub-pixels; Among them, the second preset refresh rate threshold is smaller than the first preset refresh rate threshold.

10. The display driving device according to any one of claims 1 to 8, characterized in that: The display substrate further includes: a plurality of transistor switches corresponding to the plurality of sub-pixels one by one; the display driving device further includes: a GOA driving circuit; The GOA driving circuit comprises: a first sub-circuit and a second sub-circuit; The first sub-circuit is electrically connected to the odd-numbered rows of sub-pixels arranged along the first direction, and is configured to control the on or off of transistor switches of the odd-numbered rows of sub-pixels according to a control instruction of the display driving device; The second sub-circuit is electrically connected to the even-numbered rows of sub-pixels arranged along the first direction, and is configured to control the on or off of transistor switches of the even-numbered rows of sub-pixels according to a control instruction of the display driving device.

11. A display device, characterized in that: include: A display substrate and a display driving device as claimed in any one of claims 1 to 10.

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