Display driving method and apparatus for display panel

Abstract

This invention provides a display driving method and a display driving device for a display panel, relating to the field of display technology, to avoid flickering problems caused by sudden brightness changes in the display panel when switching gamma. The display driving method includes acquiring N sets of target gammas and at least one set of transition gammas located between two adjacent sets of target gammas, where different target gammas correspond to different ambient illuminances; wherein N is an integer and N≥3; detecting the ambient illuminance of the environment in which the display panel is located at a preset frequency; determining whether the absolute value of the difference between the currently detected ambient illuminance and the previously detected ambient illuminance is greater than or equal to a preset threshold; if so, calling the target gamma corresponding to the currently detected ambient illuminance and the transition gamma corresponding to the target gamma from the N sets of target gammas, and controlling the display panel to be driven first with the transition gamma and then with the target gamma.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a display driving method and apparatus for a display panel. Background Technology

[0002] The relationship between grayscale voltage and brightness of a display panel can be represented by gamma. When driving the display panel, different gamma values ​​are used to drive the display panel under different ambient light conditions.

[0003] Currently, when switching gamma, the display panel exhibits a flickering problem due to sudden changes in brightness. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a display driving method and apparatus for a display panel to avoid flickering caused by sudden changes in brightness when switching gamma.

[0005] In a first aspect, the present invention provides a display driving method for a display panel, comprising: Obtain N sets of target gammas and at least one set of transition gammas located between two adjacent sets of target gammas. Different target gammas correspond to different ambient light intensities. Wherein, N is an integer and N≥3. Under the same grayscale, the data voltage corresponding to the transition gamma is located between the data voltages corresponding to the two adjacent sets of target gammas. The ambient light level of the environment in which the display panel is located is detected at a preset frequency; Determine whether the absolute value of the difference between the currently detected ambient illuminance and the previously detected ambient illuminance is greater than or equal to a preset threshold. If so, select the target gamma corresponding to the currently detected ambient light intensity and the transition gamma corresponding to the target gamma from the N groups of target gammas, and control the display panel to first drive with the transition gamma and then drive with the target gamma.

[0006] Secondly, based on the same inventive concept, the present invention also provides a display driving device for a display panel, comprising an acquisition unit, an ambient light sensor, a judgment unit, a control unit, and a driving circuit; wherein, The acquisition unit is used to acquire N sets of target gammas and at least one set of transition gammas located between two adjacent sets of target gammas. Different target gammas correspond to different ambient light intensities. N is an integer and N≥3. Under the same grayscale, the data voltage corresponding to the transition gamma is located between the data voltages corresponding to the two adjacent sets of target gammas. An ambient light sensor is used to detect the ambient light intensity of the environment in which the display panel is located at a preset frequency, and sends a signal corresponding to the ambient light intensity to the judgment unit. The judgment unit is used to determine whether the absolute value of the difference between the currently detected ambient light intensity and the previously detected ambient light intensity is greater than or equal to a preset threshold, and when the result is yes, to send a first call instruction to the control unit; The control unit is used to call, according to the first call instruction, a target gamma corresponding to the currently detected ambient light intensity and a transition gamma corresponding to the target gamma from N groups of target gammas; The driving circuit is used to control the display panel to first drive with transition gamma and then drive with target gamma.

[0007] By employing the display driving method and apparatus provided by this invention, and by setting multiple sets of target gammas, it can adapt to a wider range of ambient light levels, ensuring good display performance under varying ambient light conditions. Furthermore, by setting a transition gamma between adjacent target gammas, when the change in ambient light meets a preset threshold, the display panel can be driven first with the transition gamma and then with the target gamma. This effectively allows the display panel to gradually transition from the previous target gamma to the currently required target gamma, resulting in a smooth transition and near-continuous brightness changes, avoiding flickering noticeable to the human eye due to sudden brightness changes.

[0008] Furthermore, by providing different target gammas corresponding to different ambient light intensities, when driving the display panel under different ambient light intensities, even when affected by the ambient light under different intensities, the grayscale and brightness mapping relationship of different target gammas is matched with different ambient light intensities. Therefore, the brightness contrast actually presented by the display screen at each grayscale will be larger. In other words, the contrast that the human eye can actually perceive is more obvious, thereby effectively compensating for the influence of light on the brightness contrast corresponding to some grayscale levels, so that the human eye can still clearly see the details that are to be presented in the picture, thus enhancing the details of the picture. Attached Figure Description

[0009] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of a display driving method for a display panel provided in an embodiment of the present invention; Figure 2 A schematic diagram of ambient light intensity, target gamma, and transition gamma provided for an embodiment of the present invention; Figure 3A schematic diagram of another display driving method for a display panel provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of another display driving method for a display panel provided in an embodiment of the present invention; Figure 5 This is a schematic diagram of another display driving method for a display panel provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of another display driving method for a display panel provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of another display driving method for a display panel provided in an embodiment of the present invention; Figure 8 A schematic diagram of a liquid crystal display module including a liquid crystal display panel and a backlight module is provided for an embodiment of the present invention; Figure 9 A schematic diagram of a display panel and a driving device for driving it, provided in an embodiment of the present invention; Figure 10 A schematic diagram of another display panel and a driving device for driving it, provided in an embodiment of the present invention; Figure 11 A schematic diagram of an acquisition unit and a control unit provided in an embodiment of the present invention; Figure 12 This is a schematic diagram of the operating timing of a driving circuit provided in an embodiment of the present invention; Figure 13 A schematic diagram of another display panel and a driving device for driving it, provided in an embodiment of the present invention; Figure 14 This is a schematic diagram of another display panel and a driving device for driving it, provided in an embodiment of the present invention. Detailed Implementation

[0011] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0012] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0013] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention are also intended to include the plural forms unless the context clearly indicates otherwise.

[0014] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0015] In view of this, embodiments of the present invention provide a display driving method for a display panel, such as... Figure 1 As shown, Figure 1 This is a schematic diagram of a display driving method for a display panel provided in an embodiment of the present invention. The display driving method includes: Step S1: Obtain N sets of target gammas and at least one set of transition gammas located between two adjacent sets of target gammas. Different target gammas correspond to different ambient light intensities. Wherein, N is an integer and N≥3. Under the same grayscale, the data voltage corresponding to the transition gamma is located between the data voltages corresponding to the two adjacent sets of target gammas. For example, such as Figure 2 As shown, Figure 2 This is a schematic diagram of ambient light intensity, target gamma, and transition gamma provided in an embodiment of the present invention. The diagram uses a transition gamma 2 between two adjacent groups of target gamma 1 as an example. Following the order of increasing ambient light intensity, the N groups of target gamma 1 are labeled as Gamma1_1, Gamma1_2, ..., Gamma1_N-1, Gamma1_N, respectively. Similarly, the multiple groups of transition gamma 2 are labeled as Gamma2_1, Gamma2_2, ..., Gamma2_N-2, Gamma2_N-1, respectively. Figure 2 The diagram illustrates the N sets of ambient illuminance corresponding to the N target gamma values ​​Gamma1. The N sets of ambient illuminance are labeled as I1, I2, ..., I(N-1), IN.

[0016] Step S2: Detect the ambient light intensity of the environment in which the display panel is located at a preset frequency; for example, the ambient light intensity of the environment in which the display panel is located can be detected by an ambient light sensor. The ambient light sensor includes a photoelectric sensor, which can convert the collected ambient light intensity signal into an electrical signal and send it to the processing unit for processing.

[0017] Step S3: Determine whether the absolute value of the difference between the currently detected ambient light intensity and the previously detected ambient light intensity is greater than or equal to a preset threshold; If so, proceed to step S4; Step S4: From the N groups of target gamma1, call the target gamma1 corresponding to the currently detected ambient light intensity and the transition gamma2 corresponding to the target gamma1, and control the display panel to first drive with the transition gamma2 and then drive with the target gamma1.

[0018] In other words, when the current detected ambient illuminance changes significantly compared to the previous detected ambient illuminance, the display panel is not directly controlled to drive with the target gamma 1 corresponding to the current detected ambient illuminance. Instead, the display is first driven by the transitional gamma 2 to gradually transition from the previous target gamma 1 to the target gamma 1 that matches the current ambient illuminance.

[0019] For example, the above-mentioned preset threshold can be set according to the sensitivity of the application scenario to ambient light. For example, the preset threshold can be 30 Lux, 60 Lux, 80 Lux or 100 Lux.

[0020] In this embodiment of the invention, at the same gray level, the data voltage corresponding to the transition gamma 2 is located between the data voltages corresponding to the two adjacent target gamma 1s. Therefore, the brightness of the display panel when driven by the transition gamma 2 is located between the brightness when driven by the previous target gamma 1 and the brightness when driven by the current target gamma 2.

[0021] Therefore, by using the display driving method provided in this embodiment of the invention, multiple target gammas (Gamma1) can be set to adapt to more different ambient light levels, ensuring good display performance under varying ambient light conditions. Furthermore, by setting a transition gamma (Gamma2) between two adjacent target gammas (Gamma1), when the change in ambient light meets a preset threshold, the display panel can be driven first by the transition gamma (Gamma2) and then by the target gamma (Gamma1). This effectively allows the display panel to gradually transition from the previous target gamma (Gamma1) to the currently required target gamma (Gamma1), resulting in a smooth transition and near-continuous brightness changes, avoiding flickering noticeable to the human eye due to sudden brightness changes.

[0022] Furthermore, by providing different target gammas (Gamma1) corresponding to different ambient light levels, when driving the display panel under different ambient light levels, even when affected by the ambient light under different illuminance, the grayscale and brightness mapping relationship of different target gammas (Gamma1) matches the different ambient light levels. Therefore, the brightness contrast of the displayed image at each grayscale level will be larger. In other words, the contrast that the human eye can actually perceive is more obvious, which can effectively compensate for the influence of light on the brightness contrast of some grayscale levels, so that the human eye can still clearly see the details that are to be presented in the image, thereby enhancing the details of the image.

[0023] For example, the number of transition gammas Gamma2 between two adjacent target gammas Gamma1 can be one or at least two groups. For instance, there can be three, four, five, or six groups, etc.

[0024] For example, the display panel includes any one of the following: Liquid Crystal Display (LCD), Organic Light Emitting Diode (OLED), Quantum Dot Light Emitting Diode (QLED), Micro-Light Emitting Diode (Micro-LED), and Mini-Light Emitting Diode (Mini-LED). This embodiment of the invention does not limit the type of display panel.

[0025] For example, such as Figure 3 As shown, Figure 3 This is a schematic diagram of another display driving method for a display panel provided by an embodiment of the present invention. When the judgment result of the above step S3 is negative, that is, when the absolute value of the difference between the currently detected ambient light intensity and the previously detected ambient light intensity is less than a preset threshold, the above display driving method further includes: executing step S5. Step S5: Select the target gamma 1 corresponding to the currently detected ambient light intensity from the N groups of target gamma 1, and control the display panel to be driven by the target gamma 1.

[0026] When the absolute value of the difference between the currently detected ambient illuminance and the previously detected ambient illuminance is less than a preset threshold, it indicates that the currently detected ambient illuminance is close to the previously detected ambient illuminance. The brightness of the display panel driven with the target gamma 1 corresponding to the currently detected ambient illuminance is also close to the brightness driven with the target gamma 1 corresponding to the previously detected ambient illuminance. When switching between the two, the human eye will not perceive any flickering caused by the difference. In this case, embodiments of the present invention can directly control the display panel to be driven with the target gamma 1 corresponding to the current ambient illuminance, instead of switching from the transition gamma 2 to the target gamma 1 corresponding to the currently detected ambient illuminance. This avoids flickering of the display panel and also reduces the driving complexity of the display panel.

[0027] For example, in this embodiment of the invention, the duration of display driven by transitional gamma 2 is the first duration, and the duration of display driven by target gamma 2 is the second duration, with the first duration being shorter than the second duration. This setting avoids flickering caused by the display panel switching between different target gamma 1 values, while also preventing excessively long periods of driving with transitional gamma 2. It ensures that the display panel has sufficient driving time with the target gamma 1 that matches the current ambient light level, guaranteeing that the display panel maintains a brightness level matching the current ambient light level for a considerable period.

[0028] For example, such as Figure 4 As shown, Figure 4 This is a schematic diagram of another display driving method for a display panel provided in an embodiment of the present invention. The display driving method further includes: Step S50: Set multiple sets of hysteresis thresholds corresponding to two adjacent target gammas (Gamma1). For example, two adjacent target gammas (Gamma1) can form a target gamma group, and the same target gamma group can form a target gamma group with each of the two target gammas located on either side of it. Taking target gamma1_2 as an example, target gamma1_2 can form a first target gamma group with target gamma1_1, and can also form a second target gamma group with target gamma1_3.

[0029] In this embodiment of the invention, a set of hysteresis threshold groups corresponds to a target gamma group. For example, when N target gamma groups are set, this embodiment of the invention can set N-1 hysteresis threshold groups. Specifically, the N-1 hysteresis threshold groups respectively include a first hysteresis threshold group corresponding to target gammas Gamma1_1 and Gamma1_2, a second hysteresis threshold group corresponding to target gammas Gamma1_2 and Gamma1_3, a third hysteresis threshold group corresponding to target gammas Gamma1_3 and Gamma1_4; ...; and an (N-1)th hysteresis threshold group corresponding to target gammas Gamma1_N-1 and Gamma1_N.

[0030] For example, the hysteresis threshold group includes a hysteresis rise switching threshold and a hysteresis fall switching threshold. The hysteresis rise switching threshold in the same hysteresis threshold group is greater than the hysteresis fall switching threshold. For example, the hysteresis fall switching threshold in the first hysteresis threshold group is 150 Lux, and the hysteresis rise switching threshold is 300 Lux.

[0031] Step S511: Determine whether the currently detected ambient light intensity is greater than the previously detected ambient light intensity; if so, proceed to step S521. Step S521: Determine whether the currently detected ambient light intensity is greater than or equal to the hysteresis rise switching threshold. If so, proceed to step S531. Step S531: From the N groups of target gammas, retrieve the next target gamma Gamma1_i+1 that is adjacent to the previous target gamma Gamma1_i in the first order, and drive the display panel with the next target gamma Gamma1_i+1; wherein, the previous target gamma Gamma1_i corresponds to the previously detected ambient light intensity, and the ambient light intensity corresponding to the next target gamma Gamma1_i+1 is greater than the ambient light intensity corresponding to the previous target gamma Gamma1_i; wherein i is an integer, and 1≤i≤N-1. The first order can be in descending order of the brightness of the ambient light corresponding to the target gamma Gamma1. For example, when the ambient light illuminance changes from 100 Lux to 310 Lux corresponding to the target gamma Gamma1_1, and the rising switching threshold corresponding to the target gamma Gamma1_1 and the target gamma Gamma1_2 is 300 Lux, the gamma driving the display panel will be switched from the target gamma Gamma1_1 to the target gamma Gamma1_2 because 310 Lux is greater than 300 Lux.

[0032] For example, such as Figure 4 As shown, the display driving method also includes: Step S512: Determine whether the currently detected ambient light intensity is less than the previously detected ambient light intensity; if so, proceed to step S522. Step S522: Determine whether the currently detected ambient light intensity is less than or equal to the hysteresis descent switching threshold. If so, proceed to step S532. Step S532: From the N groups of target gammas, retrieve the next target gamma, Gamma1_i-1, which is adjacent to the previous target gamma, Gamma1_i, in the second order, and drive the display panel with the next target gamma, Gamma1_i-1. The second order is the reverse of the first order; the previous target gamma, Gamma1_i, corresponds to the previously detected ambient light intensity, and the ambient light intensity corresponding to the next target gamma, Gamma1_i-1, is less than the ambient light intensity corresponding to the previous target gamma, Gamma1_i. Here, i is an integer, and 2 ≤ i ≤ N. For example, if the first order is a descending order of ambient light intensity corresponding to target gamma1, the second order is a ascending order of ambient light intensity corresponding to target gamma1. For example, when the ambient light illuminance changes from 300 Lux to 140 Lux, corresponding to the target gamma Gamma1_2, and the threshold for the decrease switching between the target gamma Gamma1_1 and the target gamma Gamma1_2 is 150 Lux, the gamma driving the display panel will be switched from the target gamma Gamma1_2 to the target gamma Gamma1_1 because 140 Lux is less than 150 Lux.

[0033] This configuration avoids repeatedly triggering target gamma switching near a critical point in the illuminance range corresponding to two adjacent target gammas (Gamma1), thus reducing the driving complexity.

[0034] It should be noted that the execution order of steps S511 and S512 is not limited in the embodiments of the present invention. Figure 4 Taking step S511 as an example, if the result of step S511 is negative, step S512 can be executed. Alternatively, the order of steps S511 and S512 can be interchanged, that is, step S512 can be executed first, and if the result of step S512 is negative, step S511 can be executed. Or, steps S511 and S512 can be performed simultaneously, which will not be illustrated in the accompanying diagram.

[0035] For example, the difference between the rising switching threshold and the falling switching threshold of different hysteresis threshold groups can be the same. For instance, the rising switching threshold and the falling switching threshold of the first hysteresis threshold group can be 300 Lux and 150 Lux, respectively, and the rising switching threshold and the falling switching threshold of the second hysteresis threshold group can be 600 Lux and 450 Lux, respectively.

[0036] Alternatively, the difference between the rising switching threshold and the falling switching threshold can also be different for different hysteresis threshold groups. For example, the rising switching threshold and the falling switching threshold of the first hysteresis threshold group can be 250 Lux and 150 Lux, respectively, and the rising switching threshold and the falling switching threshold of the second hysteresis threshold group can be 450 Lux and 300 Lux, respectively.

[0037] When setting the correspondence between the target gamma (Gamma1) and ambient illuminance, for example, such as... Figure 2 As shown, the illuminance ranges I corresponding to different target gammas (Gamma1) may partially overlap. For example, a target gamma (Gamma1_1) may correspond to an ambient illuminance of less than 100 Lux, while a target gamma (Gamma1_2) may correspond to an ambient illuminance in the range of 50 Lux to 200 Lux.

[0038] Alternatively, embodiments of the present invention may also allow the illuminance intervals corresponding to different target gammas (Gamma1) to not overlap.

[0039] For example, the method described above for calling the next target gamma 1 that is adjacent to the previous target gamma 1 in a second order from N groups of target gamma 1, and driving the display panel with the next target gamma 1, may include: first driving the display panel with a transition gamma 2 located between the previous target gamma 1_i and the next target gamma 1_i+1, and then driving with the next target gamma 1_i+1. This configuration allows the display panel to gradually transition from the previous target gamma 1_i to the next target gamma 1_i+1, avoiding flickering caused by brightness jumps when switching target gamma 1.

[0040] Optional, such as Figure 5 As shown, Figure 5 This is a schematic diagram of another display driving method for a display panel provided by an embodiment of the present invention. When the judgment result of the above step S521 is negative, that is, when the currently detected ambient light intensity is less than the hysteresis rise switching threshold, the display driving method further includes: executing step S541. Step S541: Control the display panel to drive the above target gamma 1.

[0041] When the currently detected ambient illuminance is greater than the previously detected ambient illuminance, and the currently detected ambient illuminance is less than the hysteresis rise switching threshold, it indicates that the change in ambient illuminance is small. In this case, the embodiment of the present invention can stop switching the target gamma (Gamma1) and allow the display panel to still be driven with the target gamma (Gamma1) corresponding to the previously detected ambient illuminance. This ensures the normal driving of the display panel while avoiding the problem of increased driving complexity caused by frequent switching of the target gamma.

[0042] Or, such as Figure 6 As shown, Figure 6 This is a schematic diagram of another display driving method for a display panel provided by an embodiment of the present invention. When the judgment result of the above step S522 is negative, that is, when the currently detected ambient light intensity is greater than the hysteresis descent switching threshold, the display driving method further includes: executing step S541. Step S541: Control the display panel to drive the above target gamma 1.

[0043] When the currently detected ambient illuminance is less than the previously detected ambient illuminance, and the currently detected ambient illuminance is greater than the hysteresis descent switching threshold, it indicates that the change in ambient illuminance is small. In this case, the embodiment of the present invention can stop switching the target gamma (Gamma1) and allow the display panel to still be driven with the target gamma (Gamma1) corresponding to the previously detected ambient illuminance. This ensures the normal driving of the display panel while avoiding the problem of increased driving complexity caused by frequent switching of the target gamma.

[0044] For example, the target gamma 1 mentioned above can be stored in a storage module; optionally, such as Figure 7 As shown, Figure 7 This is a schematic diagram of another display driving method for a display panel provided by an embodiment of the present invention. Step S4 above, which involves calling the target gamma1 corresponding to the ambient light intensity from N groups of target gamma1, includes: Step S401: Obtain the addresses of the current gamma and the target gamma Gamma1 in the storage module respectively; Step S402: Determine whether the address of the current gamma is greater than the address of the target gamma Gamma1; if yes, proceed to step S403; if no, proceed to step S404. Step S403: Gradually decrease the address of the current gamma until the current gamma address is equal to the address of the target gamma Gamma1; Step S404: Gradually increase the address of the current gamma until the current gamma address is equal to the address of the target gamma Gamma1; Following steps S403 and S404 above, the method for retrieving the target gamma Gamma1 corresponding to the ambient illuminance from N groups of target gammas further includes: Step S405: Obtain the target gamma Gamma1 based on the address of the target gamma.

[0045] In this embodiment of the invention, there is a one-to-one correspondence between the target gamma (Gamma1) stored in the storage module and its address. Using this configuration, the target gamma (Gamma1) can be obtained by looking up its address, reducing the difficulty of finding the target gamma (Gamma1).

[0046] For example, the aforementioned transition gamma 2 is calculated from two sets of target gamma 1 located on either side and adjacent to it. Using this configuration, when the display panel needs to be driven by the transition gamma 2, the transition gamma 2 can be calculated based on the existing target gamma 1, thereby reducing the amount of pre-stored transition gamma 2, or even eliminating the need to pre-store the transition gamma 2, thus lowering the memory requirements of the storage module storing the target gamma.

[0047] Optionally, the calculation method includes interpolation calculation, such as linear interpolation, or other algorithms can be used. This embodiment of the invention does not limit the specific method used.

[0048] For example, the display driving method provided in this embodiment of the invention further includes: adjusting the color temperature of the display panel according to the currently detected ambient light intensity.

[0049] This setting allows the display panel's color temperature to match the ambient light level. For example, in dark environments with low ambient light, the display panel can display a warm color tone to provide eye protection. In bright environments with high ambient light, the display panel can display a cool color tone to improve the visibility of the displayed image.

[0050] For example, in this embodiment of the invention, the target gamma can be bound to the automatic white balance register value. When switching the target gamma according to the ambient light intensity, the color temperature can be switched synchronously.

[0051] Optionally, the above-mentioned display panel includes a liquid crystal display panel, such as... Figure 8 As shown, Figure 8This is a schematic diagram of a liquid crystal display module 1 including a liquid crystal display panel and a backlight module, provided as an embodiment of the present invention. The liquid crystal display module 1 includes a liquid crystal display panel 11 and a backlight module 12. The liquid crystal display panel 11 receives light from the backlight module 12. The liquid crystal display panel 11 includes an array substrate 111, a color filter substrate 112, and a liquid crystal layer 110. When the liquid crystal display module 1 is displaying, the liquid crystal layer 110 can be deflected under the action of the voltage difference between the pixel electrode (not shown) and the common electrode (not shown) to modulate the emitted light from the backlight module 12 to different degrees, so that the liquid crystal display module 10 achieves the target brightness.

[0052] For example, the display driving method for driving a display panel provided in the embodiments of the present invention further includes: The light intensity of the backlight module 12 is adjusted based on the currently detected ambient light level. For example, when the ambient light level is low, the light intensity of the backlight module 12 is also reduced; when the ambient light level is high, the light intensity of the backlight module 12 is increased. This is to match the light output brightness of the liquid crystal display module with the ambient light level.

[0053] For example, the method for adjusting the light intensity of the backlight module 12 described above includes: The luminous power of the light-emitting units, such as LEDs, in the backlight module 12 can be adjusted. For example, in this embodiment of the invention, the current flowing through the light-emitting unit can be adjusted to regulate the luminous power of the unit. This setting avoids the use of pulse width modulation (PWM) dimming. PWM dimming refers to a dimming method that adjusts the brightness of the light-emitting unit by controlling the ratio of its bright to dark time within a unit cycle. While adjusting the light intensity of the backlight module 12, flickering issues in the backlight module 12 can be avoided.

[0054] Based on the same inventive concept, embodiments of the present invention also provide a display driving device for a display panel, such as... Figure 9 As shown, Figure 9 This is a schematic diagram of a display panel and a driving device for driving it, provided by an embodiment of the present invention. The display driving device 2 includes an acquisition unit 21, an ambient light sensor (ALS) 22, a judgment unit 23, a control unit 24, and a driving circuit 25; wherein, The acquisition unit 21 is used to acquire, for example, Figure 2The diagram shows N sets of target gamma1 and at least one set of transition gamma2 located between two adjacent sets of target gamma1. Different target gamma1 correspond to different ambient light intensities. N is an integer and N≥3. Under the same grayscale, the data voltage corresponding to the transition gamma2 is located between the data voltages corresponding to the two adjacent sets of target gamma1. The ambient light sensor 22 is used to detect the ambient light intensity of the environment where the display panel 11 is located at a preset frequency, and send the signal corresponding to the ambient light intensity to the judgment unit 23. The judgment unit 23 is used to determine whether the absolute value of the difference between the currently detected ambient light intensity and the previously detected ambient light intensity is greater than or equal to a preset threshold, and when the result is yes, it sends a first call command to the control unit 24; The control unit 24 is used to call the target gamma 1 corresponding to the currently detected ambient light intensity and the transition gamma 2 corresponding to the target gamma 1 from the N sets of target gamma 1 acquired by the acquisition unit 21 according to the first call instruction. The driving circuit 25 is used to control the display panel 11 to be driven first with transition gamma 2 and then with target gamma 1.

[0055] By employing the display driving device provided in this embodiment of the invention, multiple target gammas (Gamma1) can be pre-acquired by the acquisition unit 21, enabling adaptation to a wider range of ambient light levels and ensuring good display performance under varying ambient light conditions. Furthermore, by acquiring the transition gamma (Gamma2) located between two adjacent target gammas (Gamma1), when the change in ambient light meets a preset threshold, the driving circuit 25 can control the display panel 11 to first be driven by the transition gamma (Gamma2) and then by the target gamma (Gamma1). This effectively allows the display panel 11 to gradually transition from the previous target gamma (Gamma1) to the currently required target gamma (Gamma1), resulting in a smooth transition and near-continuous brightness changes, avoiding sudden brightness changes that cause flickering perceptible to the human eye.

[0056] Furthermore, in this embodiment of the invention, the acquisition unit 21 acquires different target gammas (Gamma1) corresponding to different ambient light intensities. When driving the display panel under different ambient light intensities, even if affected by the ambient light under different intensities, the grayscale and brightness mapping relationship of the target gamma (Gamma1) matches the ambient light intensities. Therefore, the brightness contrast of the displayed image will be larger at each grayscale level. In other words, the contrast that the human eye can actually perceive is more obvious, which can effectively compensate for the influence of light on the brightness contrast of some grayscale levels, so that the human eye can still clearly see the details that are to be presented in the image, thereby enhancing the details of the image.

[0057] For example, the number of transition gammas Gamma2 between two adjacent target gammas Gamma1 can be one set or at least two sets.

[0058] For example, when determining whether the absolute value of the difference between the currently detected ambient light intensity and the previously detected ambient light intensity is greater than or equal to a preset threshold, if the result is no, that is, when the absolute value of the difference between the currently detected ambient light intensity and the previously detected ambient light intensity is less than the preset threshold, the determination unit 23 is further used to send a second calling instruction to the control unit 24. The control unit 24 is also configured to, according to the second calling instruction, call the target gamma 1 corresponding to the currently detected ambient light intensity from the N sets of target gamma 1 acquired by the acquisition unit 21; The drive circuit 25 is used to control the display panel 11 to be driven by the target gamma 1 according to the second call command.

[0059] When the absolute value of the difference between the currently detected ambient illuminance and the previously detected ambient illuminance is less than a preset threshold, it indicates that the currently detected ambient illuminance is close to the previously detected ambient illuminance, and the human eye will not perceive the flicker caused by this difference. In this case, the present invention embodiment can allow the judgment unit 23 to send a second call command to the control unit 24. The control unit 24, according to the second call command, calls the target gamma 1 corresponding to the currently detected ambient illuminance from N groups of target gamma 1. The driving circuit 25 directly controls the display panel 11 to be driven by the target gamma 1, instead of switching from the transition gamma 2 to the target gamma 1 corresponding to the currently detected ambient illuminance. This avoids the flickering problem caused by sudden brightness changes in the display panel and also reduces the driving complexity of the display panel 11.

[0060] For example, such as Figure 10 As shown, Figure 10This is a schematic diagram of another display panel and a driving device for driving it provided in an embodiment of the present invention. The judgment unit 23 further includes a hysteresis switching threshold setting unit 230. The hysteresis switching threshold setting unit 230 is used to set multiple sets of hysteresis thresholds corresponding to two adjacent target gammas Gamma1 respectively. The hysteresis threshold sets include a hysteresis rising switching threshold and a hysteresis falling switching threshold. The aforementioned judgment unit 23 further includes a first switching judgment unit 231, which is used to send a first switching command to the control unit 24 when the currently detected ambient light intensity is greater than the previously detected ambient light intensity, and the currently detected ambient light intensity is greater than or equal to the rising switching threshold. The aforementioned control unit 24 is also used to, according to the first switching command, call the next target gamma Gamma1_i+1 that is adjacent to the previous target gamma Gamma1_i in the first order from the N groups of target gamma Gamma1 acquired by the acquisition unit 21. Wherein, the previous target gamma Gamma1_i corresponds to the previously detected ambient light intensity, and the ambient light intensity corresponding to the next target gamma Gamma1_i+1 is greater than the ambient light intensity corresponding to the previous target gamma Gamma1_i. Alternatively, the aforementioned judgment unit 23 may further include a second switching judgment unit 232. The second switching judgment unit 232 is used to send a second switching instruction to the control unit 24 when the currently detected ambient light intensity is less than the previously detected ambient light intensity, and the currently detected ambient light intensity is less than the decreasing switching threshold. The control unit 24 is also used to, according to the second switching instruction, call the next target gamma Gamma1_i-1 that is adjacent to the previous target gamma Gamma1_i in a second order from the N groups of target gamma Gamma1 acquired by the acquisition unit 21. The second order is the opposite of the first order, the previous target gamma Gamma1_i corresponds to the previously detected ambient light intensity, and the ambient light intensity corresponding to the next target gamma Gamma1_i-1 is less than the ambient light intensity corresponding to the target gamma Gamma1_i.

[0061] This configuration avoids repeatedly triggering switching near a critical point in the illuminance range corresponding to two adjacent target gammas (Gamma1), thus reducing the driving complexity.

[0062] For example, the first switching judgment unit 231 is further configured to send a hold command to the control unit 24 when the currently detected ambient light intensity is greater than the previously detected ambient light intensity and the currently detected ambient light intensity is less than the hysteresis rise switching threshold; the control unit 24 is configured to control the drive circuit 25 to maintain the target gamma corresponding to the previously detected ambient light intensity according to the hold command.

[0063] When the currently detected ambient illuminance is greater than the previously detected ambient illuminance, and the currently detected ambient illuminance is less than the hysteresis rise switching threshold, it indicates that the change in ambient illuminance is small. In this case, the embodiment of the present invention can send a hold command to the control unit 24 through the first switching judgment unit 231, so that the driving circuit 25 can stop switching the target gamma 1 under the action of the hold command. The driving display panel 11 will still display with the target gamma 1 corresponding to the previously detected ambient illuminance. While ensuring the normal driving of the display panel 11, the problem of increased driving complexity caused by frequent switching of target gamma 1 can be avoided.

[0064] Alternatively, the second switching judgment unit 232 is further configured to send a hold command to the control unit 24 when the currently detected ambient light intensity is less than the previously detected ambient light intensity and the currently detected ambient light intensity is greater than the hysteresis descent switching threshold; the control unit 24 is configured to control the drive circuit 25 to maintain the target gamma corresponding to the previously detected ambient light intensity according to the hold command.

[0065] When the currently detected ambient illuminance is less than the previously detected ambient illuminance, and the currently detected ambient illuminance is greater than the hysteresis descent switching threshold, it indicates that the change in ambient illuminance is small. In this case, the embodiment of the present invention can send a hold command to the control unit 24 through the second switching judgment unit 232, so that the driving circuit 25 can stop switching the target gamma 1 under the action of the hold command. The driving display panel 11 will still display with the target gamma 1 corresponding to the previously detected ambient illuminance. While ensuring the normal driving of the display panel 11, the problem of increased driving complexity caused by frequent switching of the target gamma 1 can be avoided.

[0066] Optional, such as Figure 11 As shown, Figure 11 This is a schematic diagram of an acquisition unit and a control unit provided in an embodiment of the present invention. The acquisition unit 21 includes a programming module 211 and a storage module 212. The programming module 211 is used to program N groups of target gamma1 to the storage module 212. The control unit 24 includes a gamma address acquisition module 241, a gamma address comparison module 242, a processing module 243, and a mapping module 244; The gamma address acquisition module 241 is used to acquire the addresses of the current gamma and the target gamma Gamma1 in the storage module 212 respectively; the gamma address comparison module 242 is used to compare the address of the current gamma and the address of the target gamma Gamma1; if the address of the current gamma is greater than the address of the target gamma, the processing module 243 is used to gradually decrease the address of the current gamma until the current gamma address is equal to the address of the target gamma Gamma1; if the address of the current gamma is less than the address of the target gamma Gamma1, the processing module 243 is used to gradually increase the address of the current gamma until the current gamma address is equal to the address of the target gamma Gamma1; the mapping module 244 is used to obtain the target gamma Gamma1 based on the address of the target gamma Gamma1.

[0067] In this embodiment of the invention, there is a one-to-one correspondence between the target gamma 1 stored in the storage module 212 and its address. Using this configuration, the target gamma 1 can be obtained by looking up the address, reducing the difficulty of finding the target gamma 1.

[0068] For example, the acquisition unit 21 may also include a calculation module, which is used to calculate the transition gamma Gamma2 based on two sets of target gamma Gamma1 located on both sides of and adjacent to the transition gamma Gamma2.

[0069] By adopting this setting, when the transition gamma 2 needs to be used to drive the display panel 11, the transition gamma 2 can be calculated based on the existing target gamma 1, thereby reducing the number of pre-stored transition gamma 2, or even not storing the transition gamma 2 in advance, which can reduce the memory requirements of the storage module 212.

[0070] Optionally, the calculation method includes interpolation calculation, such as linear interpolation, or other algorithms can be used. This embodiment of the invention does not limit the specific method used.

[0071] For example, such as Figure 12 As shown, Figure 12This is a timing diagram of a driving circuit according to an embodiment of the present invention. The operation of the driving circuit 25 includes a blanking time Vblank, a display driving time display, and a touch driving time TP. In this embodiment, the control unit 24 is used to select the target gamma 1 corresponding to the currently detected ambient light intensity from N groups of target gamma 1s during the blanking time Vblank. By using this setting, the command sent to the driving circuit 25 to switch the target gamma 1 using the blanking time Vblank can avoid affecting the display operation during the display driving time display and the touch operation during the touch driving time TP.

[0072] For example, the driving circuit 25 described above can employ a Touch and Display Driver Integration (TDDI) chip. Compared to conventional chips used only for display driving or only for touch driving, TDDI has a larger memory. By selecting TDDI in this embodiment of the invention, the target gamma 1 can be stored in the TDDI. While implementing display operations and touch operations, more target gamma 1 can be stored in the larger memory of the TDDI.

[0073] For example, the drive circuit 25 includes random access memory (RAM). Figure 13 As shown, Figure 13 This is a schematic diagram of another display panel and a driving device for driving it provided in an embodiment of the present invention. The above-mentioned acquisition unit 21 further includes a flash memory (FLASH) 213 and a loading module 214; the flash memory 213 is used to pre-store N sets of target gamma1.

[0074] Optionally, the flash memory 213 also stores firmware (FW).

[0075] For example, flash memory 213 can be externally connected to drive circuit 25. Loading module 214 can load N sets of target gamma1 from flash memory 213 into random access memory during the power-on phase of drive circuit 25; control unit 24 is used to... Figure 12 The blanking time Vblank shown retrieves the target gamma Gamma1 corresponding to the currently detected ambient illuminance from the random access memory.

[0076] Optionally, the color temperature register value can also be pre-stored in the flash memory 213. During the power-on phase of the driving circuit 25, the color temperature register value can be loaded into the random access memory to realize automatic gradual adjustment of color temperature and improve the display visual effect under multiple ambient light conditions with different illuminance.

[0077] For example, such as Figure 14 As shown, Figure 14 This is a schematic diagram of another display panel and a driving device for driving it according to an embodiment of the present invention. The display driving device 2 includes at least two of the driving circuits 25, and the at least two driving circuits 25 are cascaded.

[0078] Optionally, at least two cascaded drive circuits 25 can be used for medium-sized display panels such as flat panel displays, laptops, desktop computers, and automotive displays. For example, different drive circuits 25 can drive different areas of the display panel 11.

[0079] Optionally, during the blanking time Vblank, at least two cascaded drive circuits 25 can synchronize the parameters.

[0080] In this embodiment of the invention, during the power-on phase of the driving circuit 25, all target gammas in the flash memory 213 can be loaded into the random access memory of the driving circuit 25 to avoid downloading the target gamma Gamma1 in the flash memory 213 within the blanking time Vblank, thus avoiding encroaching on the limited duration of the blanking time Vblank.

[0081] Optionally, in this embodiment of the invention, the number of pre-stored target gamma1 can be determined based on the size of the random access memory.

[0082] For example, such as Figure 13 As shown, the acquisition unit 21 includes a flash memory 213, which is used to pre-store N sets of target gammas Gamma1; the control unit 24 is used to retrieve the target gamma corresponding to the currently detected ambient light intensity from the flash memory 213 during the blanking time Vblank.

[0083] Optional, such as Figure 13 As shown, the display driver 2 includes only one driver circuit 25. For example, this driver circuit 25 can read the corresponding target gamma from the flash memory 213 during the blanking time Vblank.

[0084] For example, the number of gammas stored in flash memory 213 can be set according to the storage space size of flash memory 213 and the storage space occupied by the touch firmware (FW). Taking a storage space of 250KB for flash memory 213, 200KB for the touch firmware, and approximately 58 bytes for one gamma, flash memory 213 can store approximately 862 gammas.

[0085] For example, in this embodiment of the invention, the driving circuit 25 is also used to receive touch reporting information from the display panel 11.

[0086] like Figure 9 , Figure 10 , Figure 13 and Figure 14 As shown, the display driver 2 also includes a first communication bus 31, and the first call command and the touch reporting information can share the first communication bus 31.

[0087] For example, the first invocation command and touch reporting information can be transmitted in a time-division multiplexing manner via the first communication bus 31. For instance, the touch reporting information can be transmitted via... Figure 12 The touch drive time (TP) transmission shown is located between two display drive times (display). The first call instruction can be transmitted during the blanking time (Vblank).

[0088] Optionally, the first communication bus 31 includes an I2C bus.

[0089] For example, the display panel 11 includes a liquid crystal display panel that receives light from the backlight module 12; such as Figure 8 As shown, the liquid crystal display panel 11 receives light from the backlight module 12. For example, the display driving device 2 also includes a backlight adjustment unit, which sends a backlight adjustment command to the backlight module 12 based on the currently detected ambient light level. The backlight adjustment command is used to adjust the light intensity emitted by the backlight module 12.

[0090] For example, such as Figure 9 , Figure 10 , Figure 13 and Figure 14 As shown, the display driver 2 also includes a second communication bus 32, and the ambient light illuminance and backlight adjustment commands can share the second communication bus 32.

[0091] For example, the adjustment of the light output intensity of the backlight module 12 can be performed simultaneously with the switching of the target gamma 1. For instance, when the ambient light intensity increases, the gamma is switched to the target gamma corresponding to the high ambient light intensity while the light output intensity of the backlight module 12 is increased. When the ambient light intensity decreases, the gamma is switched to the target gamma corresponding to the low ambient light intensity while the light output intensity of the backlight module 12 is decreased.

[0092] For example, the luminous power of the light-emitting unit, such as an LED, in the backlight module 12 can be adjusted. By adjusting the luminous power, the light intensity of the backlight module 12 can be adjusted. For example, in this embodiment of the invention, the current flowing through the light-emitting unit can be adjusted to achieve adjustment of the luminous power of the light-emitting unit. Using this setting method, pulse width modulation (PWM) dimming can be avoided. PWM dimming refers to a dimming method that adjusts the brightness of the light-emitting unit by controlling the ratio of the bright and dark time periods of the light-emitting unit per unit cycle. While adjusting the light intensity of the backlight module 12, flickering problems in the backlight module 12 can be avoided.

[0093] As can be seen from the above embodiments, the display module and display device provided by the present invention achieve at least the following beneficial effects: The present invention provides a display driving method for a display panel, comprising: Obtain N sets of target gammas and at least one set of transition gammas located between two adjacent sets of target gammas. Different target gammas correspond to different ambient light intensities. Wherein, N is an integer and N≥3. Under the same grayscale, the data voltage corresponding to the transition gamma is located between the data voltages corresponding to the two adjacent sets of target gammas. The ambient light level of the environment in which the display panel is located is detected at a preset frequency; Determine whether the absolute value of the difference between the currently detected ambient illuminance and the previously detected ambient illuminance is greater than or equal to a preset threshold. If so, select the target gamma corresponding to the currently detected ambient light intensity and the transition gamma corresponding to the target gamma from the N groups of target gammas, and control the display panel to first drive with the transition gamma and then drive with the target gamma.

[0094] This invention, by setting multiple target gammas, can adapt to a wider range of ambient light levels, ensuring good display performance under varying conditions. Furthermore, by setting a transition gamma between adjacent target gammas, when changes in ambient light meet a preset threshold, the display panel can be driven first by the transition gamma and then by the target gamma. This effectively allows the display panel to gradually transition from the previous target gamma to the currently desired target gamma, resulting in a smooth transition and near-continuous brightness changes, avoiding flickering noticeable to the human eye due to sudden brightness changes.

[0095] Furthermore, by providing different target gammas corresponding to different ambient light intensities, when driving the display panel under different ambient light intensities, even when affected by the ambient light under different intensities, the grayscale and brightness mapping relationship of different target gammas is matched with different ambient light intensities. Therefore, the brightness contrast actually presented by the display screen at each grayscale will be larger. In other words, the contrast that the human eye can actually perceive is more obvious, thereby effectively compensating for the influence of light on the brightness contrast corresponding to some grayscale levels, so that the human eye can still clearly see the details that are to be presented in the picture, thus enhancing the details of the picture.

[0096] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A display driving method for a display panel, characterized in that, include: N sets of target gammas and at least one set of transition gammas located between two adjacent sets of target gammas are obtained, and different target gammas correspond to different ambient light intensities; where N is an integer and N≥3; under the same gray level, the data voltage corresponding to the transition gamma is located between the data voltages corresponding to the two adjacent sets of target gammas; The ambient light level of the environment in which the display panel is located is detected at a preset frequency; Determine whether the absolute value of the difference between the currently detected ambient illuminance and the previously detected ambient illuminance is greater than or equal to a preset threshold. If so, the target gamma corresponding to the currently detected ambient illuminance and the transition gamma corresponding to the target gamma are called from the N groups of target gammas, and the display panel is controlled to first be driven by the transition gamma and then by the target gamma.

2. The display driving method according to claim 1, characterized in that, When the absolute value of the difference between the currently detected ambient illuminance and the previously detected ambient illuminance is less than the preset threshold, the display driving method further includes: The target gamma corresponding to the currently detected ambient light intensity is selected from the N groups of target gammas, and the display panel is controlled to drive with the target gamma.

3. The display driving method according to claim 1, characterized in that, The duration for which the display is driven by the transition gamma is defined as the first duration, and the duration for which the display panel is driven by the target gamma is defined as the second duration, wherein the first duration is shorter than the second duration.

4. The display driving method according to claim 1, characterized in that, Also includes: Multiple sets of hysteresis thresholds are set, each corresponding to two adjacent target gammas. The hysteresis threshold sets include hysteresis rise switching thresholds and hysteresis fall switching thresholds. When the currently detected ambient illuminance is greater than the previously detected ambient illuminance, and the currently detected ambient illuminance is greater than or equal to the hysteresis rise switching threshold, the next target gamma that is adjacent to the previous target gamma in the first order is selected from the N groups of target gammas, and the display panel is driven by the next target gamma; wherein, the previous target gamma corresponds to the previously detected ambient illuminance, and the ambient illuminance corresponding to the next target gamma is greater than the ambient illuminance corresponding to the previous target gamma; When the currently detected ambient illuminance is less than the previously detected ambient illuminance, and the currently detected ambient illuminance is less than the hysteresis descent switching threshold, the next target gamma that is adjacent to the previous target gamma in a second order is selected from the N groups of target gammas, and the display panel is driven by the next target gamma; wherein, the second order is the opposite of the first order, the previous target gamma corresponds to the previously detected ambient illuminance, and the ambient illuminance corresponding to the next target gamma is less than the ambient illuminance corresponding to the previous target gamma.

5. The display driving method according to claim 4, characterized in that, Also includes: When the currently detected ambient illuminance is greater than the previously detected ambient illuminance, and the currently detected ambient illuminance is less than the hysteresis rise switching threshold; or when the currently detected ambient illuminance is less than the previously detected ambient illuminance, and the currently detected ambient illuminance is greater than the hysteresis fall switching threshold, Control the display panel to drive the target gamma as described above.

6. The display driving method according to claim 4, characterized in that, The hysteresis rise switching threshold in the same hysteresis threshold group is greater than the hysteresis fall switching threshold.

7. The display driving method according to claim 1, characterized in that, The target gamma is stored in the storage module; Retrieving the target gamma corresponding to the ambient light intensity from N groups of target gammas includes: Obtain the addresses of the current gamma and the target gamma in the storage module, respectively; Determine whether the address of the current gamma is greater than the address of the target gamma; If so, gradually decrease the address of the current gamma until the current gamma address is equal to the address of the target gamma; If not, gradually increase the address of the current gamma until the current gamma address is equal to the address of the target gamma; The target gamma is obtained based on the address of the target gamma.

8. The display driving method according to claim 1, characterized in that, The transition gamma is calculated from the two sets of target gammas located on either side of and adjacent to it.

9. The display driving method according to claim 1, characterized in that, The display panel includes a liquid crystal display panel, which receives light from the backlight module; The display driving method further includes: The light intensity of the backlight module is adjusted based on the currently detected ambient light level.

10. The display driving method according to claim 9, characterized in that, A method for adjusting the light emission intensity of the backlight module includes: Adjust the luminous power of the light-emitting unit in the backlight module.

11. A display driving device for a display panel, characterized in that, It includes an acquisition unit, an ambient light sensor, a judgment unit, a control unit, and a drive circuit; among which, The acquisition unit is used to acquire N sets of target gammas and at least one set of transition gammas located between two adjacent sets of target gammas, wherein different target gammas correspond to different ambient light intensities, where N is an integer and N≥3; under the same gray level, the data voltage corresponding to the transition gamma is located between the data voltages corresponding to the two adjacent sets of target gammas; The ambient light sensor is used to detect the ambient light intensity of the environment in which the display panel is located at a preset frequency, and to send a signal corresponding to the ambient light intensity to the judgment unit. The judgment unit is used to determine whether the absolute value of the difference between the currently detected ambient illuminance and the previously detected ambient illuminance is greater than or equal to a preset threshold, and when the result is yes, to send a first calling instruction to the control unit. The control unit is configured to, according to the first calling instruction, call from the N groups of target gammas the target gamma corresponding to the currently detected ambient illuminance and the transition gamma corresponding to the target gamma; The driving circuit is used to control the display panel to first be driven by the transition gamma and then by the target gamma.

12. The display driving device according to claim 11, characterized in that, The judgment unit is further configured to send a second calling instruction to the control unit when the absolute value of the difference between the currently detected ambient illuminance and the previously detected ambient illuminance is less than the preset threshold. The control unit is further configured to, according to the second calling instruction, call the target gamma corresponding to the currently detected ambient light intensity from the N groups of target gammas; The driving circuit is used to control the display panel to drive the target gamma.

13. The display driving device according to claim 11, characterized in that, The judgment unit includes a hysteresis handover threshold setting unit, a first handover judgment unit, or a second handover judgment unit; The hysteresis switching threshold setting unit is used to set multiple threshold groups corresponding to two adjacent target gammas, and the threshold groups include hysteresis rising switching threshold and hysteresis falling switching threshold. The first switching determination unit is used to send a first switching command to the control unit when the currently detected ambient light intensity is greater than the previously detected ambient light intensity, and the currently detected ambient light intensity is greater than or equal to the rising switching threshold. The second switching determination unit is used to send a second switching command to the control unit when the currently detected ambient light intensity is less than the previously detected ambient light intensity, and the currently detected ambient light intensity is less than the decreasing switching threshold. The control unit is further configured to, according to the first switching instruction, call the next target gamma that is adjacent to the previous target gamma in a first order from the N groups of target gammas; wherein, the previous target gamma corresponds to the previously detected ambient light intensity, and the ambient light intensity corresponding to the next target gamma is greater than the ambient light intensity corresponding to the previous target gamma. The control unit is further configured to, according to the second switching instruction, call the next target gamma that is adjacent to the previous target gamma in a second order from the N groups of target gammas; wherein, the second order is the opposite of the first order, the previous target gamma corresponds to the previously detected ambient light intensity, and the ambient light intensity corresponding to the next target gamma is less than the ambient light intensity corresponding to the first target gamma.

14. The display driving device according to claim 13, characterized in that, The determination unit is further configured to send a hold command to the control unit when the currently detected ambient light intensity is greater than the previously detected ambient light intensity and the currently detected ambient light intensity is less than the hysteresis rise switching threshold, or when the currently detected ambient light intensity is less than the previously detected ambient light intensity and the currently detected ambient light intensity is greater than the hysteresis fall switching threshold. The control unit is used to control the drive circuit to maintain the target gamma corresponding to the previously detected ambient light intensity according to the hold command.

15. The display driving device according to claim 11, characterized in that, The acquisition unit includes a burning module and a storage module. The burning module is used to burn N sets of the target gammas into the storage module. The control unit includes a gamma address acquisition module, a gamma address comparison module, a processing module, and a mapping module; The gamma address acquisition module is used to acquire the addresses of the current gamma and the target gamma in the storage module, respectively. The gamma address comparison module is used to compare the size of the current gamma address and the target gamma address; If the address of the current gamma is greater than the address of the target gamma, the processing module is used to gradually decrease the address of the current gamma until the current gamma address is equal to the address of the target gamma; If the address of the current gamma is less than the address of the target gamma, the processing module is used to gradually increase the address of the current gamma until the current gamma address is equal to the address of the target gamma; The mapping module is used to obtain the target gamma based on the address of the target gamma.

16. The display driving device according to claim 11, characterized in that, The acquisition unit includes a calculation module, which is used to calculate the transition gamma based on two sets of target gammas located on both sides of and adjacent to the transition gamma.

17. The display driving device according to claim 11, characterized in that, The working process of the driving circuit includes blanking time, display driving time, and touch driving time. The control unit is used to, during the blanking time, retrieve the target gamma corresponding to the currently detected ambient illuminance from the N groups of target gammas.

18. The display driving device according to claim 17, characterized in that, The driving circuit includes a random access memory; The acquisition unit includes a flash memory and a loading module; the flash memory is used to pre-store N sets of the target gamma; the flash memory is externally connected to the driving circuit; the loading module is used to load the N sets of the target gamma in the flash memory into the random access memory during the power-on phase of the driving chip; The control unit is used to retrieve the target gamma corresponding to the currently detected ambient illuminance from the random access memory during the blanking time.

19. The display driving device according to claim 18, characterized in that, The display driving device includes at least two driving circuits, and the at least two driving circuits are cascaded.

20. The display driving device according to claim 17, characterized in that, The acquisition unit includes a flash memory, which is used to pre-store N sets of the target gamma; The control unit is used to retrieve the target gamma corresponding to the currently detected ambient illuminance from the flash memory during the blanking time.

21. The display driving device according to claim 20, characterized in that, The display driving device includes only one driving circuit.

22. The display driving device according to claim 11, characterized in that, The driving circuit is also used to receive touch reporting information from the display panel; The display driver further includes a first communication bus, and the first call instruction and the touch reporting information share the first communication bus.

23. The display driving device according to claim 11, characterized in that, The display panel includes a liquid crystal display panel, which receives light from the backlight module; The display driving device further includes a backlight adjustment unit, which is used to send a backlight adjustment command to the backlight module according to the currently detected ambient light intensity, and the backlight adjustment command is used to adjust the light output intensity of the backlight module.

24. The display driving device according to claim 23, characterized in that, The display driver also includes a second communication bus, which is shared by the ambient light illuminance and the backlight adjustment command.

Images