LED display arrangement system enhancing grayscale recognition effect of images by human eye

Abstract

To provide an LED display arrangement system that enhances the grayscale recognition effect of images by a human eye.SOLUTION: An LED display layout system includes a PWM dimming module 10, a gamma modulation module 11, a grayscale zone compensation module 12, and a switching module 13. The grayscale zone compensation module sets a first current to form a first brightness range 100, forming a first modulation section from X to 100%, with Y% as the minimum allowable value. Subsequent currents are set to form modulation sections, and when it is determined that brightness X% is the minimum allowable value or more, subsequent currents are set, and the determination is repeated until the brightness X% of an Nth modulation section becomes the minimum allowable value or less. For any two adjacent modulation sections, the maximum brightness output of the latter modulation section is the brightness X% or more of the previous modulation section, such that the set currents corresponding to the first through Nth modulation sections gradually decrease. This allows a product to form and switch between modulation sections optimal for practical brightness needs.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a display system, and more particularly to an LED display arrangement system that enhances the grayscale perception effect of an image by the human eye. [Background technology]

[0002] During the manufacturing process of conventional displays, the operating brightness range is adjusted by controlling the current magnitude of the LED display to meet the market needs of the final product. However, this type of technical method of adjusting the displayed brightness range by controlling the current combination can cause color cast problems when the display requires a high brightness range, which is detrimental to the overall display quality of the product. Therefore, another prior art method provides a method of using a fixed current combination to multiply a percentage coefficient by the originally set gamma value to obtain a new gamma value, and then using this new gamma value to control the grayscale of the entire screen to improve quality. In other words, the aforementioned prior art uses a percentage coefficient to perform precise gamma correction, adjusting the distinction and balance of the grayscale of colors within a pixel, thereby achieving the effect of correcting the visual brightness of the entire image. Summary of the Invention [Problem to be solved by the invention]

[0003] However, when the display is used for a high-luminance display, the luminance adjustment method, which multiplies the gamma value by a percentage coefficient according to the luminance ratio based on the needs, may cause excessive adjustment of the gamma value due to an excessive multiplication of the percentage coefficient, resulting in a smooth curve and an inability to properly represent the gray scale. In view of these drawbacks, the present invention aims to address the problem of how to correct the gamma value and simultaneously form multiple adaptive luminance range areas on the display based on ambient lighting by adjusting the current in combination, thereby improving the drawbacks of the prior art, solving the color cast problem, and achieving image quality with the best gamma modulation effect.

[0004] The present invention provides an LED display alignment system for use in a direct-view LED display screen, which forms multiple brightness range modulation sections by combining selected gamma values ​​with gradually decreasing set currents, and selects the brightness range modulation sections based on the actual usage of the display to achieve the best image gray scale. At the same time, to accommodate the constantly changing brightness gradients in different locations and environments, the present invention provides an LED display alignment system with two different switching sensitivities, which can be effectively implemented in different application locations and devices. [Means for solving the problem]

[0005] To achieve the above-mentioned objectives, the present invention provides an LED display arrangement system for a direct-view LED display screen, which has high switching sensitivity and enhances the grayscale perception effect of an image by the human eye. The system includes a PWM dimming module, a gamma modulation module, a grayscale zone compensation module, and a switching module. The PWM (Pulse-Width Modulation) dimming module adjusts and has a brightness range expressed as a percentage. The gamma modulation module is provided with a plurality of gamma values ​​for modulation selection. The grayscale zone compensation module is communicatively connected to the PWM dimming module and the gamma modulation module. The grayscale zone compensation module has N modulation sections, where N is an integer greater than or equal to 2, each modulation section having a respective set current, and the set currents are respectively defined as a first current to an Nth current. In the first modulation section, the compensation reference value is X% of the brightness range and Y% is the minimum allowable value based on the light output of the first current and the selected gamma value. Based on the same compensation reference value, the corresponding set currents for the subsequent modulation sections from the first modulation section to the Nth modulation section are sequentially arranged. In any two adjacent modulation sections, the maximum brightness output of the set current for the latter modulation section is equal to or slightly greater than the brightness output based on the compensation reference value in the previous modulation section, resulting in a gradually decreasing relationship between the set currents for the first modulation section to the Nth modulation section. Furthermore, the brightness output in the Nth modulation section based on the compensation reference value is lower than the brightness output in the first modulation section based on the minimum allowable value. All of the modulation sections operate within a brightness range of 100% to X%. The switching module is communicatively connected to the grayscale zone compensation module and provides manual or automatic switching selection for the modulation interval.

[0006] X may be greater than or equal to 50, and Y may be less than or equal to 10. The LED display arrangement system further includes an ambient light sensor module connected to the switching module, which automatically senses the ambient light brightness in real time and outputs an illuminance level. The system can manually select a modulation section based on the illuminance level, or the ambient light sensor module can output an illuminance level to the switching module, which can then automatically select a modulation section based on the illuminance level. The switching module includes a switching decision device. After the direct-view LED display screen selects and operates a modulation section, the switching decision device detects the average operating luminance range of the direct-view LED display screen within a certain time zone. If the average operating luminance range is found to be in the overlapping range of the previous and next modulation sections, a range switching signal is fed back to the switching module, causing the switching module to automatically switch to the next modulation section. Each modulation section employs a different gamma value, and each gamma value has its own coefficient to achieve a complete gamma modulation effect.

[0007] To achieve the above objective, the present invention provides another LED display arrangement system that enhances the grayscale perception of images by the human eye, while having slightly lower switching sensitivity compared to the previous system. It is used in a direct-view LED display screen and includes a PWM dimming module, a gamma modulation module, a grayscale zone compensation module, and a switching module. The PWM (Pulse-Width Modulation) dimming module performs adjustment and has a brightness range expressed as a percentage. The gamma modulation module is provided with multiple gamma values ​​for modulation selection. The grayscale zone compensation module is communicatively connected to the PWM dimming module and the gamma modulation module. The grayscale zone compensation module has N modulation sections, where N is an integer greater than or equal to 2, each with a respective set current, and the set currents are respectively defined as a first current through an Nth current. In the first modulation section, a compensation reference value of X% of the brightness range is set according to the first current and the light-emitting output of the selected gamma value, and a minimum allowable value of Y% is set according to the same compensation reference value. The corresponding set currents for the subsequent modulation sections from the first modulation section to the Nth modulation section are sequentially arranged based on the same compensation reference value. In any two adjacent modulation sections, the maximum brightness output of the set current for the latter modulation section is lower than the brightness output based on the compensation reference value in the previous modulation section. Therefore, the set currents corresponding to the first modulation section to the Nth modulation section have a gradually decreasing relationship, and the brightness output based on the compensation reference value in the Nth modulation section is lower than the brightness output based on the first modulation section's minimum allowable value. The switching module is communicatively connected to the grayscale zone compensation module and selects the modulation sections manually or automatically.

[0008] X may be greater than or equal to 50, and Y may be less than or equal to 10. The LED display arrangement system further includes an ambient light sensor module connected to and communicating with the switching module, which automatically senses the ambient light brightness in real time and outputs an illuminance level. The system can manually select a modulation period based on the illuminance level, or the ambient light sensor module can output an illuminance level to the switching module, which can then automatically select a modulation period based on the illuminance level. When N=2, the interval between the brightness X% output from the first modulation period and the brightness 100% output from the second modulation period is 7-26% of the brightness range of the first modulation period. Each modulation period employs a different gamma value, and each gamma value has its own coefficient to achieve a perfect gamma modulation effect.

[0009] To summarize the above, the present invention achieves the objective of achieving high image grayscale discrimination in a wide brightness range by combining the traditional current adjustment technique with the gamma value modification technique. In other words, the technique of forming the first to Nth modulation sections that have a decreasing force relationship by combining the first to Nth currents with the selected gamma values ​​to achieve a wide brightness range image display capability. This allows the direct-view LED display screen to easily select and switch among the modulation sections based on the actual usage environment to match the required brightness range of ambient illumination. This allows display products to be adapted to a wide market range and improves the economic efficiency of the product. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a structural schematic diagram relating to a first embodiment of the present invention. [Figure 2] 1 is a flowchart relating to a first embodiment of the present invention. [Figure 3A] 10 is a flowchart relating to a second embodiment of the present invention. [Figure 3B]10 is a flowchart relating to a second embodiment of the present invention. [Figure 4] FIG. 4 is a structural schematic diagram relating to a second embodiment of the present invention. [Figure 5] FIG. 10 is a diagram showing a modulation section according to a second embodiment of the present invention. [Figure 6] FIG. 10 is a diagram showing a modulation section according to a third embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] In order to allow those skilled in the art to clearly understand the contents of the present invention, the following description is accompanied by drawings, please refer to them.

[0012] 1 and 2 are a structural schematic diagram and a flowchart, respectively, of a first embodiment of the present invention. As shown, an LED display alignment system 1 for improving the grayscale perception of an image by the human eye is used in a direct-view LED display screen and includes a PWM dimming module 10, a gamma modulation module 11, a grayscale zone compensation module 12, and a switching module 13. The grayscale zone compensation module 12 is communicatively connected with the PWM dimming module 10, the gamma modulation module 11, and the switching module 13, and the gamma modulation module 11 has a plurality of gamma values ​​110 for selecting modulation. To adapt to time-varying luminance gradients in different environments, the LED display alignment system 1 provides two different alignment methods with switching sensitivities. This embodiment takes switching to a relatively high-sensitivity LED display alignment method as an example, which may include the following steps:

[0013] In step S10, the brightness range 100 to be adjusted is expressed as a percentage. Thus, the PWM dimming module 10 has the brightness range 100 to be adjusted and expressed as a percentage, and X% of the brightness range 100 is used as a compensation reference value. In step S11, the grayscale zone compensation module 12 sets a first current and combines the light output of the gamma value 110 to form the first brightness range 100. Based on this compensation reference value, a first modulation section 120 is formed from X to 100% of the first brightness range 100, and Y% of the first brightness range 100 is used as the minimum allowable value. In step S12, the grayscale zone compensation module 12 sets a second current based on the brightness X% of the first modulation section 120 and combines the light output of the gamma value 110 to form the second brightness range 100. In addition, based on the same compensation reference value, a second modulation section 120 is formed from X to 100% of the second brightness range 100.

[0014] In step S13, the grayscale zone compensation module 12 determines whether the luminance X% of the second modulation section 120 is lower than the minimum allowable value. If not, and the grayscale zone compensation module 12 determines that the luminance X% of the second modulation section 120 obtained is equal to or greater than the minimum allowable value, in step S14, the subsequent current is set based on the luminance X% of the second modulation section 120, and the light output of the gamma value 110 is combined to form the subsequent luminance range, and the subsequent modulation section 120 is formed based on the same compensation reference value. That is, if the grayscale zone compensation module 12 determines that the luminance X% of the previous modulation section 120 obtained is equal to or greater than the minimum allowable value, the subsequent currents up to the Nth current are reset to form the Nth modulation section 120, and this continues until the luminance X% is equal to or less than the minimum allowable value.

[0015] As can be seen from the above, the grayscale zone compensation module 12 has N modulation sections 120, where N is an integer greater than or equal to 2. Each modulation section 120 has its own set current, which are respectively defined as the first current through the Nth current. The first modulation section 120 uses the first current and the selected gamma value 110 as the light output, with X% of the brightness range 100 as the compensation reference value and Y% as the minimum allowable value. Based on the same compensation reference value, the corresponding set currents are arranged sequentially from the first modulation section 120 to the Nth modulation section 120. Furthermore, all modulation sections 120 operate within a brightness range of 100% to X%. It should be noted that for any two adjacent modulation sections 120, the maximum brightness output of the set current of the latter modulation section 120 is equal to or slightly greater than the brightness output based on the compensation reference value of the former modulation section 120. Therefore, the set currents corresponding to the first modulation section 120 through the Nth modulation section 120 exhibit a gradually decreasing relationship. Furthermore, the brightness output from the Nth modulation section 120 according to the compensation reference value is equal to or lower than the brightness output from the first modulation section 120 according to the minimum allowable value.

[0016] In step S15, the switching module 13 manually or automatically switches the modulation section 120 to set the brightness range in which the direct-view LED display screen operates according to the actual application conditions of the product. This not only ensures a wide brightness range to meet market needs, but also maintains the best stable image for a long time, thereby increasing the economic value of the product. In addition, the actual setting of the direct-view LED display screen by switching the selected modulation section 120 is not limited to using all modulation sections 120 or restricting the use of one of the modulation sections 120.

[0017] 3A, 3B, 4, and 5 are a flowchart, a structural diagram, and a modulation section of a second embodiment of the present invention, respectively. As shown in the figures, in order to solve the image quality problems caused by inaccurate grayscales and low discrimination rates that easily occur in direct-view LED display screens (not shown) when applying a conventional wide brightness range, the present invention provides an LED display layout method with high switching sensitivity and improved grayscale recognition by the human eye, which includes the following steps: In step S20, a brightness range 100 to be adjusted is expressed as a percentage, and X% of the brightness range 100 is used as a compensation reference value. In step S21, a first current is set and a light output from a plurality of gamma values ​​110 is combined to form the first brightness range 100. Based on the compensation reference value, a first modulation section 120 is formed from X to 100% of the first brightness range 100, and Y% of the first brightness range 100 is used as the minimum allowable value. In step S22, a second current is set based on the brightness X% of the first modulation section 120, and the second brightness range 100 is formed by combining the light emitting output of the gamma value 110. Also, a second modulation section 120 is formed from X to 100% of the second brightness range 100 based on the same compensation reference value.

[0018] In step S23, it is determined whether the luminance X% output by the compensation reference value in the second modulation section 120 is less than the minimum allowable value. If the acquired luminance X% of the second modulation section 120 is equal to or greater than the minimum allowable value, in step S24, a third current is set based on the luminance X% of the second modulation section 120, and the light-emitting output of the gamma value 110 is combined to form a third luminance range 100. The third modulation section 120 is then formed based on the same compensation reference value. Subsequently, in step S25, it is determined whether the luminance X% output by the compensation reference value in the previous modulation section 120 is less than the minimum allowable value. If the acquired luminance X% of the previous modulation section 120 is equal to or greater than the minimum allowable value, in step S26, a subsequent current is set based on the luminance X% of the further previous modulation section 120, and the light-emitting output of the gamma value 110 is combined to form a subsequent luminance range 100. The subsequent modulation section 120 is then formed based on the same compensation reference value. In this manner, repeated determination is made. As soon as it is determined that the brightness X% of the previous modulation section 120 is above the minimum allowable value, the currents from the next modulation section 120 to the Nth modulation section 120 are reset. This process is repeated until the brightness X% of the formed Nth modulation section 120 is below the minimum allowable value, and then step S27 is entered. In this embodiment, X is greater than or equal to 50, and Y is less than or equal to 10. Moreover, different gamma values ​​110 may be used in the modulation sections 120, and each gamma value 110 has its own coefficient, thereby achieving a complete gamma value modulation effect. Between any two adjacent modulation sections 120, the maximum brightness output of the next modulation section 120 is equal to or slightly greater than the brightness output based on the compensation reference value of the previous modulation section 120, so that the set currents corresponding to the first modulation section 120 to the Nth modulation section 120 have a gradually decreasing relationship.

[0019] In step S27, the real-time brightness of the surrounding light is automatically sensed and an illuminance level is output. Then, in step S28, the modulation section 120 is manually selected based on the illuminance level. Alternatively, in step S29, one of the first modulation section 120 to the Nth modulation section 120 is automatically selected based on the illuminance level to set the operating luminance range of the direct-view LED display screen. Furthermore, the present invention may also perform step S30, but is not necessarily limited to this. In step S30, for the direct-view LED display screen operating in one of the modulation sections 120, the average operating luminance range over a certain period of time is checked. If the comparison reveals that the average operating luminance range is less than the set value, a range switching signal is fed back to automatically switch to the next modulation section 120. In this way, the direct-view LED display screen is provided with an operating environment. After the operator makes the initial setting, the direct-view LED display screen is provided with the function of appropriately adjusting the operating luminance range in real time, thereby ensuring image quality and improving user satisfaction.

[0020] As described above, the present inventors have provided an LED display arrangement system 1 for improving the grayscale perception of an image by the human eye to realize the LED display arrangement method. The LED display arrangement system 1 includes a PWM dimming module 10, a gamma modulation module 11, a grayscale zone compensation module 12, a switching module 13, and an ambient light sensor module 14. The grayscale zone compensation module 12 is connected in communication with the PWM dimming module 10, the gamma modulation module 11, and the switching module 13, and the switching module 13 is connected in communication with the ambient light sensor module 14. The PWM dimming module 10 performs adjustment and has a brightness range 100 expressed as a percentage. The gamma modulation module 11 is provided with a plurality of gamma values ​​110 for modulation selection, and the switching module 13 is provided with a switching determiner 130.

[0021] The grayscale zone compensation module 12 has N modulation sections, where N is an integer greater than or equal to 2. Each modulation section 120 has a set current, which are respectively defined as a first current to an Nth current. The first modulation section 120 uses a compensation reference value of X% (e.g., X is 50 or more) of the brightness range 100 based on the first current and the light-emitting output of the selected gamma value, and a minimum allowable value of Y% (e.g., Y is 10 or less) of the brightness range 100. Based on the same compensation reference value, the set currents corresponding to the Nth modulation sections 120 are sequentially arranged from the end of the first modulation section 120 to the end of the Nth modulation section 120. Furthermore, for any two adjacent modulation sections 120, the maximum brightness output of the set current of the latter modulation section 120 is equal to or slightly greater than the brightness output based on the compensation reference value of the former modulation section 120. Therefore, the set currents corresponding to the first modulation section 120 to the Nth modulation section 120 have a gradually decreasing relationship. The brightness output by the Nth modulation section 120 according to the compensation reference value is equal to or lower than the brightness output by the first modulation section 120 according to the minimum allowable value. All modulation sections 120 have an operating zone within a brightness range 100 of 100% to X%. Each modulation section 120 may employ a different gamma value 110, and each gamma value 110 has its own coefficient. Thus, each modulation section 120 adjusts the corresponding setting current in combination with at least one of the gamma value 110 and its coefficient, thereby improving the completeness of the gamma adjustment effect and the display quality of the display.

[0022] The ambient light sensor module 14 automatically senses the real-time brightness of the surrounding light and outputs an illumination level, which is then used to manually switch the switching module 13 to select the modulation section 120; alternatively, the ambient light sensor module 14 outputs an illumination level to the switching module 13, which then automatically switches based on the illumination level to select the modulation section 120. In one possible embodiment, after the direct-view LED display screen selects one of the modulation sections 120 to operate, the switching decision device 130 detects the average operating brightness range of the direct-view LED display screen within a certain time zone, and if it is determined through comparison that the average operating brightness range is located in the overlapping range of the two preceding and following modulation sections 120, a range switching signal is fed back so that the switching module 13 automatically switches to the following modulation section 120. For example, the maximum brightness output of the set current of the second modulation section 120 is equal to or slightly greater than the brightness output by the compensation reference value of the first modulation section 120, resulting in an overlapping range between the two. At this time, after the direct-view LED display screen selects the first modulation section 120 to operate, if the switching decision device 130 detects that the average brightness range during operation is within the overlapping joint or overlapping area between the first modulation section 120 and the second modulation section 120, a switching signal is fed back, and the switching module 13 switches to the second modulation section 120 for operation.

[0023] The present invention also discloses an LED display configuration system 1 that improves the human eye's grayscale perception of images, while slightly reducing the switching sensitivity of the previous embodiment. It is used in a direct-view LED display screen adapted for service applications, and employs a relatively small number of modulation sections 120, as shown in FIG. 6, to meet the actual needs of users and improve their satisfaction with the practicality of the product. The LED display configuration system 1 includes a PWM dimming module 10, a gamma modulation module 11, a grayscale zone compensation module 12, a switching module 13, and an ambient light sensor module 14. The grayscale zone compensation module 12 is in communication with the PWM dimming module 10, the gamma modulation module 11, and the switching module 13, and the switching module 13 is in communication with the ambient light sensor module 14. The PWM dimming module 10 adjusts and has a brightness range 100, expressed as a percentage. The gamma modulation module 11 is provided with a plurality of gamma values ​​110 for modulation selection, and each gamma value 110 is provided with a respective coefficient to achieve a complete gamma modulation effect.

[0024] The grayscale zone compensation module 12 has N modulation sections 120, where N is an integer greater than or equal to 2. Each modulation section 120 has its own set current, and the set currents are respectively defined as a first current to an Nth current. The first modulation section 120 has a compensation reference value of, for example, X% or more of the luminance range 100, based on the first current and a selected gamma value 110, and a minimum allowable value of, for example, Y% or less of the luminance range 100. The set currents corresponding to the Nth modulation sections 120 are arranged sequentially from the first modulation section 120 based on the same compensation reference value. Each modulation section 120 may employ a different gamma value 110. Between any two adjacent modulation sections 120, the maximum luminance output of the set current of the latter modulation section 120 is lower than the luminance output based on the compensation reference value of the former modulation section 120. Therefore, the set currents corresponding to the first modulation section 120 to the Nth modulation section 120 have a gradually decreasing relationship. The brightness output from the Nth modulation section 120 according to the compensation reference value is equal to or lower than the brightness output from the first modulation section 120 according to the minimum allowable value. When N=2, the interval between the brightness X% output from the first modulation section 120 and the brightness 100% output from the second modulation section 120 is 7 to 26% of the brightness range 100 of the first modulation section 120.

[0025] The switching module 13 selects the modulation section 120 by switching manually or automatically. The ambient light sensor module 14 automatically senses the real-time environmental illumination brightness and outputs an illuminance level. The modulation section 120 is selected by manual switching based on the illuminance level, or the ambient light sensor module 14 outputs an illuminance level to the switching module 13, and the switching module 13 automatically switches based on the illuminance level to select the modulation section 120.

[0026] The modules described in this invention can be realized by hardware or software supplemented by hardware. For example, the PWM dimming module 10, gamma modulation module 11, grayscale zone compensation module 12, switching module 13, and ambient light sensor module 14 are essentially a combination of various hardware devices such as CPU, microprocessor, memory, signal transmitter, sensor, display chip, and transformer, as well as technical features realized by the software program supplementing them.

[0027] To summarize, the present invention achieves the objective of achieving high image grayscale discrimination in a wide brightness range by combining conventional current adjustment and gamma value modification techniques. In other words, the technical means of forming and corresponding to the first through Nth modulation periods, which have a gradually decreasing force relationship, by combining selected gamma values ​​with the first through Nth currents, which have a gradually decreasing force relationship, realizes the image display capability in a wide brightness range. This allows the direct-view LED display screen to easily select and switch among the modulation periods based on the actual usage environment to match the required brightness range of ambient illumination. This allows display products to be adapted to a wide market range and improves product economic efficiency. Furthermore, to address differences in brightness gradients due to constantly changing ambient brightness in different locations, the present invention's technical means with different switching sensitivities can be employed to significantly improve applicability to various environments and device needs. [Explanation of symbols]

[0028] 1 LED display placement system 10 PWM dimming modules 100 brightness range 11 Gamma Modulation Module 110 gamma value 12 Grayscale Zone Compensation Module 120 modulation section 13 Switching Module 130 Switching decision device 14 Ambient Light Sensor Module S10~S15 steps S20~S30 steps

Claims

1. An LED display arrangement system for enhancing the grayscale perception effect of an image by human eyes, which is used for a direct-view LED display screen, includes a PWM dimming module, a gamma modulation module, a grayscale zone compensation module and a switching module, The PWM (Pulse-width modulation) dimming module adjusts and has a brightness range expressed as a percentage; The gamma modulation module is provided with a plurality of gamma values ​​for modulation selection; the grayscale zone compensation module is communicatively connected to the PWM dimming module and the gamma modulation module, the grayscale zone compensation module having N modulation sections, N being an integer greater than or equal to 2, each modulation section having a respective set current, and the set currents are respectively defined as a first current to an Nth current; In a first modulation section, X% of the luminance range is set as a compensation reference value and Y% is set as a minimum allowable value according to the first current and the light emission output of the selected gamma value, and the corresponding set currents are sequentially arranged from the modulation section subsequent to the first modulation section to the Nth modulation section based on the same compensation reference value; In any two adjacent modulation sections among them, the maximum luminance output of the set current in the latter modulation section is equal to or slightly greater than the luminance output according to the compensation reference value in the former modulation section, so that the set currents corresponding to the first modulation section to the Nth modulation section respectively have a gradually decreasing relationship of power; Furthermore, the luminance output by the Nth modulation section according to the compensation reference value is equal to or less than the luminance output by the first modulation section according to the minimum allowable value, The modulation section has an operating zone in the brightness range of 100% to X%, The LED display arrangement system is characterized in that the switching module is communicatively connected to the grayscale zone compensation module, and manually or automatically switches and selects the modulation section, thereby improving the grayscale perception effect of the image by the human eye.

2. The LED display arrangement system for enhancing the gray scale perception effect of an image by human eyes as claimed in claim 1 , wherein X is equal to or greater than 50 and Y is equal to or less than 10.

3. 3. The LED display arrangement system for improving the grayscale recognition effect of images by the human eye as claimed in claim 2, characterized in that the LED display arrangement system further comprises an ambient illumination sensor module communicatively connected with the switching module, which automatically senses the ambient illumination brightness in real time and outputs an illumination level, and manually switches to select the modulation period based on the illumination level; or the ambient illumination sensor module outputs the illumination level to the switching module, and the switching module automatically switches to select the modulation period based on the illumination level.

4. 3. The LED display arrangement system for improving the grayscale recognition effect of images by human eyes according to claim 2, wherein the switching module comprises a switching decision device, and after the direct-view LED display screen selects the modulation section and operates, the switching decision device detects the average brightness range during operation within a certain time zone of the direct-view LED display screen, and when it is determined through comparison that the average brightness range during operation is located in the overlapping range of the two preceding and following modulation sections, a range switching signal is fed back so that the switching module automatically switches to the subsequent modulation section.

5. The LED display arrangement system for enhancing the grayscale perception effect of an image by the human eye according to any one of claims 1 to 4, characterized in that each of the modulation sections adopts a different gamma value, and each of the gamma values ​​has a coefficient, thereby achieving a complete gamma modulation effect.

6. An LED display arrangement system for enhancing the grayscale perception effect of an image by human eyes, which is used for a direct-view LED display screen, includes a PWM dimming module, a gamma modulation module, a grayscale zone compensation module and a switching module, The PWM (Pulse-width modulation) dimming module adjusts and has a brightness range expressed as a percentage; The gamma modulation module is provided with a plurality of gamma values ​​for modulation selection; the grayscale zone compensation module is communicatively connected to the PWM dimming module and the gamma modulation module, the grayscale zone compensation module having N modulation sections, N being an integer greater than or equal to 2, each modulation section having a respective set current, and the set currents are respectively defined as a first current to an Nth current; In a first modulation section, X% of the brightness range is set as a compensation reference value and Y% is set as a minimum allowable value according to the first current and the light emitting output of the selected gamma value, and the corresponding set currents are sequentially arranged from the modulation section subsequent to the first modulation section to the Nth modulation section based on the same compensation reference value; In any two adjacent modulation sections, the maximum luminance output of the set current in the latter modulation section is smaller than the luminance output according to the compensation reference value in the former modulation section, so that the set currents corresponding to the first modulation section to the Nth modulation section respectively have a gradually decreasing relationship of power, and the luminance output in the Nth modulation section according to the compensation reference value is lower than the luminance output in the first modulation section according to the minimum allowable value, The LED display arrangement system is characterized in that the switching module is communicatively connected to the grayscale zone compensation module, and manually or automatically switches and selects the modulation section, thereby improving the grayscale perception effect of the image by the human eye.

7. The LED display arrangement system for enhancing the gray scale perception effect of an image by human eyes as claimed in claim 6, wherein X is equal to or greater than 50 and Y is equal to or less than 10.

8. 10. The LED display arrangement system for improving the grayscale recognition effect of images by the human eye as claimed in claim 7, wherein the LED display arrangement system further comprises an ambient illumination sensor module communicatively connected with the switching module, which automatically senses the real-time illumination brightness of the environment and outputs an illumination level, and manually switches to select the modulation period based on the illumination level; or the ambient illumination sensor module outputs the illumination level to the switching module, and the switching module automatically switches to select the modulation period based on the illumination level.

9. The LED display arrangement system for enhancing the grayscale perception effect of an image by the human eye according to any one of claims 6 to 8, characterized in that when N=2, the brightness X% output from the first modulation section and the brightness 100% output from the second modulation section have an interval of 7 to 26% of the brightness range of the first modulation section.

10. The LED display arrangement system of claim 9, characterized in that each modulation section adopts a different gamma value, and each gamma value has a different coefficient, thereby achieving a complete gamma modulation effect.

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