Liquid crystal panel driving circuit system for reducing temperature of IC (integrated circuit)

Abstract

The invention provides a liquid crystal panel driving circuit system for reducing IC (integrated circuit) temperature, which comprises a time sequence control module for generating a control time sequence and data required by image display by receiving a front-end data signal; the data driving module is used for opening the corresponding control end according to the control time sequence; according to the method, the liquid crystal display panel is used for displaying data, the brightness corresponding to each pixel point in the data required by image display and a driving signal are used for driving the liquid crystal display panel line by line to display the data, and the driving gear for driving the liquid crystal display panel is adjusted in the stable output stage of adjacent lines or / and the non-display time period of switching of adjacent frames so that the driving gear can be lower than the driving gear in the normal display time period. The driving capability of the data driving module in an unstable output stage or / and a non-display period is reduced by using the variable driving gear, so that the data driving module works in a low-power-consumption mode, the temperature of the data driving module is reduced, and the working temperature of an IC (Integrated Circuit) is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid crystal display devices, and in particular relates to a liquid crystal panel driving circuit system for reducing IC temperature. Background Art

[0002] In modern electronic devices, liquid crystal displays often include display panel drive circuits, in which driver ICs play a key role, responsible for controlling the working status of various electronic components. Especially in liquid crystal displays (LCDs), the role of driver ICs is particularly important, as they need to receive signals generated by timing control circuits and convert them into electrical signals to drive liquid crystal molecules to deflect and display images.

[0003] However, the driver IC generates a lot of heat during operation, which not only affects its own performance, but may also affect the stability of the entire system. And with the average size of panel shipments growing by one inch each year, RC Loading needs to increase synchronously. At the same time, in order to meet the dynamic effect of TV screens, the method of increasing the refresh rate and high frame rate is often adopted. From the power consumption formula P = (1 / 2)fCV2, it can be seen that the greater the load, the higher the refresh rate, and the greater the power consumption. As a result, the COF temperature rises, and the temperature rise increases the risk of melting the LCD display frame. Therefore, how to effectively reduce the temperature of the driver IC and improve its working efficiency and stability is an urgent problem to be solved in the current electronic equipment design.

[0004] The existing solutions to the problem of excessive temperature of the driver IC are mainly to improve the design and materials of the driver IC to improve its heat dissipation efficiency. For example, the driver IC package can be made of materials with high thermal conductivity, or a heat sink can be added to the driver IC. In addition, the operating frequency and operating voltage of the driver IC can be optimized to reduce its heat generation. However, there are some problems with the existing solutions. First, these solutions often require high costs, not only to increase the heat sink process, but also to increase the site, workstations and manpower, which is easy to reduce the yield while increasing the cost burden for mass-produced electronic products. Secondly, these solutions may have a certain impact on the performance of the driver IC. For example, adding a heat sink may increase the volume and weight of the driver IC, thereby affecting its working stability. Finally, the existing solutions often cannot effectively reduce the operating temperature of the driver IC in the non-display area (such as the v-blanking area), which may cause the driver IC to work inefficiently in the non-display area, and may even cause it to be overheated and damaged. Summary of the invention

[0005] In order to solve the above problems existing in the prior art, the present invention provides a liquid crystal panel driving circuit system for reducing the temperature of IC. The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0006] A liquid crystal panel driving circuit system for reducing IC temperature comprises:

[0007] A timing control module, used to generate data required for controlling the timing and image display by receiving the front-end data signal;

[0008] A data driving module is used to open the corresponding control terminal according to the control timing, and use the brightness corresponding to each pixel in the data required for the image display to drive the liquid crystal panel row by row to display the required data with the image, and adjust the driving gear of the liquid crystal panel during the stable output period of adjacent rows and / or the non-display period of adjacent frames to make it lower than the driving gear during the normal display period.

[0009] Beneficial effects:

[0010] The present invention provides a liquid crystal panel driving circuit system for reducing the temperature of an IC, comprising a timing control module for generating a control timing and data required for image display by receiving a front-end data signal; a data driving module for opening a corresponding control terminal according to the control timing, and using the brightness and driving signal corresponding to each pixel in the data required for image display, driving the liquid crystal panel row by row to display data, and adjusting the driving gear of the liquid crystal panel during the stable output stage of adjacent rows or / and the non-display period of adjacent frame switching to be lower than the driving gear during the normal display period. The present invention uses a variable driving gear to reduce the driving capability of the data driving module during the unstable output stage or / and the non-display period, so that it works in a low power consumption mode, reducing the temperature of the data driving module, and thus reducing the operating temperature of the IC.

[0011] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of a liquid crystal panel driving circuit system for reducing IC temperature provided by the present invention;

[0013] Figure 2 It is a driving schematic diagram of the non-display period and the display period provided by the present invention;

[0014] Figure 3 It is a schematic diagram of the driving capability variation during the stable output period provided by the present invention. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below with reference to specific embodiments, but the embodiments of the present invention are not limited thereto.

[0016] refer to Figures 1 to 3 The present invention provides a liquid crystal panel driving circuit system for reducing IC temperature, including: a power supply module 11, a timing control module 12, a level conversion module 13, a grayscale control module 14 and a data driving module 15.

[0017] The power supply module 11 is used to provide working voltage and reference voltage for the timing control module, the data driving module, the level conversion module and the grayscale control module;

[0018] The timing control module 12 is used to generate data required for controlling the timing and image display by receiving the front-end data signal;

[0019] The timing control module is also used to generate a detection signal, and use the detection signal to detect whether the adjacent rows and / or adjacent frames start switching or end switching, and determine the time when the adjacent rows start switching and end switching are used as a stable output period, and determine the time when the adjacent frames start switching and end switching are used as a non-display period.

[0020] It is worth noting that the conditions for detecting whether the switching starts or ends by the detection signal include but are not limited to time, signal trigger edge, voltage, etc.

[0021] The timing control module of the present invention includes but is not limited to a microcontroller, a programmable logic controller, etc.

[0022] The level conversion module 13 is used to convert the control timing into a level timing for controlling pixel points;

[0023] The grayscale control module 14 is used to provide the data driving module 15 with brightness corresponding to the pixel value.

[0024] The data driving module 15 is used to open the corresponding control end according to the control timing, and use the brightness corresponding to each pixel in the data required for the image display to drive the liquid crystal panel row by row to display the required data for the image, and adjust the driving gear of the liquid crystal panel during the stable output period of adjacent rows and / or the non-display period of adjacent frames to make it lower than the driving gear during the normal display period.

[0025] The present invention utilizes variable driving gears to reduce the driving capability of the data driving module in the non-display period, so that the data driving module operates in a low power consumption mode, thereby reducing the temperature of the data driving module and thus reducing the operating temperature of the IC.

[0026] In a specific implementation of the present invention, the data driving module is used to:

[0027] a. Receive data required for controlling timing and image display;

[0028] b. Open the corresponding control terminal according to the control sequence;

[0029] c. Determine the brightness of each pixel in the data required for image display according to the brightness corresponding to the pixel value;

[0030] d. Set the driving gear; wherein, the driving gear is not less than 2 gears, the highest gear is the first gear, the highest gear has the strongest driving ability, and the lowest gear has the weakest driving ability; the driving ability is positively correlated with the size of the charging level.

[0031] The present invention can divide the driving gears according to the external charging level of the data driving module. The higher the charging level, the greater the driving capability. Different gears can be divided according to the percentage of the charging level.

[0032] e. driving the liquid crystal panel row by row to display data according to the brightness and driving gear corresponding to each pixel in the data required for image display;

[0033] In this step, according to the brightness corresponding to each pixel point in the data required for image display and the driving gear, the liquid crystal panel is charged row by row according to the charging level corresponding to the brightness, so that the liquid crystal panel displays the data required for image display; wherein the absolute value of the charging level is positively correlated with the brightness.

[0034] f. During the stable output period of the adjacent rows and / or the non-display period of the adjacent frames, the driving gear of the liquid crystal panel is adjusted to be lower than the driving gear during the normal display period.

[0035] refer to Figure 2 When operating in a stable output period or / and a non-display period, the data driving module can reduce the driving capability to an appropriate level and operate in a low-power mode.

[0036] In a specific embodiment of the present invention, the stable output period of the adjacent rows is divided into a rising stage, a stable stage and an end stage; in the rising stage, the driving gear of the data driving module is adjusted to gear 1; in the stable stage, the driving gear is adjusted to be lower than gear 1; there are multiple division intervals in the stable stage, and the division intervals are consistent with the number of driving gears.

[0037] In a specific implementation of the present invention, when the driving gear is 2, in the stable output period of the adjacent row, adjusting the driving gear of the liquid crystal panel to be lower than the driving gear in the normal display period includes:

[0038] In the rising stage, the driving gear of the liquid crystal panel is kept at the first gear;

[0039] In the stable stage, adjusting the driving gear of the liquid crystal panel to the second gear;

[0040] In the end stage, the driving gear for driving the liquid crystal panel is maintained at the second gear.

[0041] In a specific implementation of the present invention, when the driving gear is greater than 2 gears, in the stable output period of the adjacent row, adjusting the driving gear of the liquid crystal panel to be lower than the driving gear in the normal display period includes:

[0042] a. In the rising phase of the adjacent row, the driving gear of the liquid crystal panel is kept at the first gear;

[0043] b. In a stable phase of adjacent rows, adjusting the driving gear of the liquid crystal panel to increase gradually according to the divided intervals;

[0044] c. At the end stage of the adjacent rows, the driving gear for driving the liquid crystal panel is kept consistent with the driving gear last adjusted in the stable stage.

[0045] refer to Figure 3 As shown, Figure 3 The output and control timing TP of the data driving module S0C-OF are shown in FIG. When the falling edge of TP arrives, the data driving module is in a stable output period. The stable output period is divided into a rising stage, a stable stage and an end stage, and the stable stage is divided into 3 division intervals. The stable stage of the stable output period is divided into 3 division intervals. The starting driving force of the rising stage is 100%, and after the stable stage is divided according to the first division interval, it is divided into 3 intervals. The driving gear increases successively, and the driving force decreases successively to 80%, 60%, and 40% respectively.

[0046] In an optional implementation manner of the present invention, in a non-display period of adjacent frames, adjusting the driving gear of the liquid crystal panel to be lower than the driving gear in a normal display period includes:

[0047] In the non-display period of adjacent frames, the driving gear of the liquid crystal panel is adjusted so that the driving capacity corresponding to the driving gear is 80%-70% of the driving capacity corresponding to the driving gear in the normal display period.

[0048] The present invention provides a liquid crystal panel driving circuit system for reducing the temperature of an IC, comprising a timing control module for generating a control timing and data required for image display by receiving a front-end data signal; a data driving module for opening a corresponding control terminal according to the control timing; and using the brightness corresponding to each pixel point in the data required for image display and a driving signal, driving the liquid crystal panel row by row to display data, and adjusting the driving gear of the liquid crystal panel during the stable output stage of adjacent rows or / and the non-display period of adjacent frame switching to be lower than the driving gear during the normal display period. The present invention uses a variable driving gear to reduce the driving capability of the data driving module during the unstable output stage or / and the non-display period, so that it works in a low power consumption mode, reducing the temperature of the data driving module, and thus reducing the operating temperature of the IC.

[0049] It is worth noting that the terms "first" and "second" in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0050] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality of components or steps.

[0051] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A liquid crystal panel driving circuit system for reducing IC temperature, characterized in that: include: A timing control module, used to generate data required for controlling the timing and image display by receiving the front-end data signal; A data driving module is used to open the corresponding control terminal according to the control timing, and use the brightness corresponding to each pixel in the data required for the image display to drive the liquid crystal panel row by row to display the required data with the image, and adjust the driving gear of the liquid crystal panel during the stable output period of adjacent rows and / or the non-display period of adjacent frames to make it lower than the driving gear during the normal display period.

2. The liquid crystal panel driving circuit system for reducing IC temperature according to claim 1, characterized in that: The liquid crystal panel driving circuit system for reducing the temperature of the IC further comprises: a power supply module, a level conversion module and a grayscale control module; The power supply module is used to provide working voltage and reference voltage for the timing control module, the data driving module, the level conversion module and the grayscale control module; The level conversion module is used to convert the control timing into a level timing for controlling pixel points; The grayscale control module is used to provide the data driving module with brightness corresponding to the pixel value.

3. The liquid crystal panel driving circuit system for reducing IC temperature according to claim 1, characterized in that: The data driving module is used for: Receiving the control timing and data required for image display; Open the corresponding control terminal according to the control timing sequence; Determining the brightness of each pixel in the data required for image display according to the brightness corresponding to the pixel value; Set the drive gear; According to the brightness and driving gear corresponding to each pixel in the data required for image display, the liquid crystal panel is driven row by row to display the data required for image display; During the stable output period of adjacent rows or the non-display period of adjacent frames, the driving gear for driving the liquid crystal panel is adjusted to be lower than the driving gear during the normal display period.

4. The liquid crystal panel driving circuit system for reducing IC temperature according to claim 3, characterized in that: The step of driving the liquid crystal panel row by row to display data according to the brightness and driving gear corresponding to each pixel in the data required for image display comprises: According to the brightness and driving gear corresponding to each pixel in the data required for the image display, the liquid crystal panel is charged row by row according to the charging level corresponding to the brightness, so that the liquid crystal panel displays the data; wherein the absolute value of the charging level is positively correlated with the brightness.

5. The liquid crystal panel driving circuit system for reducing IC temperature according to claim 3 or 4, characterized in that: The driving gear is no less than 2 gears, the highest gear is the first gear, the highest gear has the strongest driving ability, and the lowest gear has the weakest driving ability; the driving ability is positively correlated with the size of the charging level.

6. The liquid crystal panel driving circuit system for reducing IC temperature according to claim 1, characterized in that: The timing control module is also used to generate a detection signal, and use the detection signal to detect whether the adjacent row or / and adjacent frame starts switching or ends switching, and determines the time of starting switching and ending switching of the adjacent row as a stable output period; The times of starting and ending switching of adjacent frames are determined as non-display periods.

7. The liquid crystal panel driving circuit system for reducing IC temperature according to claim 6, characterized in that: The stable output period of the adjacent rows is divided into a rising stage, a stable stage and an ending stage; in the rising stage, the driving gear of the data driving module is adjusted to gear 1; in the stable stage, the driving gear is adjusted to be lower than gear 1; there are multiple division intervals in the stable stage, and the division intervals are consistent with the number of driving gears.

8. The liquid crystal panel driving circuit system for reducing IC temperature according to claim 7, characterized in that: When the driving gear is 2, in the stable output period of the adjacent row, adjusting the driving gear of the liquid crystal panel to be lower than the driving gear in the normal display period includes: In the rising stage, the driving gear of the liquid crystal panel is kept at the first gear; In the stable stage, adjusting the driving gear of the liquid crystal panel to the second gear; In the end stage, the driving gear for driving the liquid crystal panel is maintained at the second gear.

9. The liquid crystal panel driving circuit system for reducing IC temperature according to claim 7, characterized in that: When the driving gear is greater than 2 gears, in the stable output period of the adjacent row, adjusting the driving gear of the liquid crystal panel to be lower than the driving gear in the normal display period includes: In the rising stage, the driving gear of the liquid crystal panel is kept at the first gear; In the stable stage, adjusting the driving gear of the liquid crystal panel to increase gradually according to the divided intervals; In the end stage, the driving gear for driving the liquid crystal panel is kept consistent with the driving gear last adjusted in the stable stage.

10. The liquid crystal panel driving circuit system for reducing IC temperature according to claim 1, characterized in that: During the non-display period of adjacent frames, adjusting the driving gear of the liquid crystal panel to be lower than the driving gear during the normal display period includes: In the non-display period of adjacent frames, the driving gear of the liquid crystal panel is adjusted so that the driving capacity corresponding to the driving gear is 80%-70% of the driving capacity corresponding to the driving gear in the normal display period.

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