Resolution refresh method for variable resolution panel source circuit

Abstract

The application discloses a refresh method of a variable resolution panel source circuit, and is applied to a driving chip, and comprises the following steps: S1, receiving display configuration information from an upper computer; the configuration information comprises the number of first PADs corresponding to the display panel and relative position information of the first PADs; the number of the first PADs is less than or equal to the number of second PADs on the driving chip; S2, determining position information of a target PAD in the second PADs corresponding to the driving chip based on the configuration information and attribute information of the driving chip; the attribute information of the driving chip comprises the number and position information of the first PADs on the driving chip; S3, changing the working state of the target PAD based on the position information of the target PAD, and completing refresh of the resolution; the application improves the compatibility of the DDIC or the source chip, brings power consumption matching while being compatible with smaller resolution, and avoids additional power consumption of invalid display.

Description

Technical Field

[0001] This invention relates to display circuits, and more particularly to a resolution refresh method for a variable resolution panel source circuit. Background Technology

[0002] The source driver circuit is a circuit that converts the multi-bit digital signal corresponding to the sub-pixel into an analog signal and outputs it to the display panel. It is also known as the column driver circuit or data driver circuit and is an indispensable part of the display driver circuit of LCD or OLED panels. Different peripheral circuit solutions exist in the display industry depending on the type of panel and the resolution of the panel. The source driver circuit may be independent of the timing control circuit and the gate driver circuit, or all three may be integrated together to form a DDIC (Display Driver Integrated Circuit).

[0003] For display panels with different resolutions, it is necessary to design a DDIC or source circuit with the corresponding resolution for matching. If an incompatible DDIC or source circuit is used, it will cause incomplete display or invalid display areas. When the effective resolution of the source is greater than that of the panel, the invalid display areas will cause additional power consumption. Summary of the Invention

[0004] To address the aforementioned shortcomings in the prior art, the resolution refresh method for the variable resolution panel source circuit provided by this invention improves the compatibility of DDIC or source chips, achieving power matching while being compatible with smaller resolutions, and avoiding additional power consumption from invalid displays.

[0005] To achieve the aforementioned objectives, the present invention employs the following technical solution: a refresh method for a variable resolution panel source circuit, characterized in that it is applied to a driver chip and includes:

[0006] S1. Receive display configuration information from the host computer; the configuration information includes the number of first PADs corresponding to the display panel and the relative position information of the first PADs; the number of first PADs is less than or equal to the number of second PADs on the driver chip;

[0007] S2. Based on the configuration information and the attribute information of the driver chip, determine the position information of the target PAD in the second PAD corresponding to the driver chip; the attribute information of the driver chip includes the number and position information of the first PAD on the driver chip;

[0008] S3. Based on the location information of the target PAD, change the working state of the target PAD to complete the resolution refresh.

[0009] Further: In S1, the first PAD corresponding to the display panel is the PAD of the valid connection of the current refresh line on the display panel;

[0010] When the display panel is an irregularly shaped panel, the effective connected PAD is the PAD that displays the lit sub-pixel of the current row;

[0011] When the display panel is not an irregularly shaped panel, the PADs with valid connections are equivalent to all rows, and all PADs on the display panel are the first PADs.

[0012] The second PAD is the PAD on the source display driver chip.

[0013] Further: In S2, when the display panel is symmetrical, the position information of the target PAD is the corresponding position of the target PAD obtained by the driver chip based on the symmetry property and the number of the first PAD, with the central axis as the center of symmetry.

[0014] When the display panel is asymmetrical, the position information of the target PAD is determined by the number of first PADs to the left and right of any line, and the offset of the central axis is determined. The driver chip parses the position of the target PAD by the offset of the central axis and the number of first PADs. The position information of the target PAD corresponds to the first PAD of the current display row.

[0015] Further: In S3, the method for changing the working state of the target PAD is as follows: the driver chip controls the target PAD to change from the working state to the low power / non-working state, so that the output of the target PAD is a low level of hiz or vss.

[0016] Furthermore: In S3, when the display panel is an irregularly shaped panel, the resolution is refreshed row by row, and the first PAD of the current row is matched in different rows respectively;

[0017] When the display panel is not an irregularly shaped panel, the resolution is refreshed frame by frame or refreshed globally once.

[0018] Furthermore: the driver chip includes an electrically connected source control circuit and a fully custom source circuit;

[0019] The source control circuit is used to generate a source signal and output it to the source fully customized circuit.

[0020] The source fully custom circuit is used to receive the source signal and generate a sequence of pulses;

[0021] The sequence pulse includes several pulse signals, each pulse signal corresponding to a PAD on the driver chip. The target PAD is selected by the PAD selection signal latched by the pulse signal, and the working state of the circuit corresponding to the target PAD is changed.

[0022] The beneficial effects of this invention are as follows:

[0023] 1. This invention reuses the original data transmission and display circuits, but adds a small amount of additional circuit resources to achieve resolution selection, that is, to internally select and switch the analog circuit part of the source.

[0024] 2. This greatly enhances the compatibility of source / DDIC with panels of different resolutions and effectively reduces power consumption waste during the driving process of various resolution panels. Attached Figure Description

[0025] Figure 1 This is a flowchart of the resolution refresh method for a variable resolution panel source circuit.

[0026] Figure 2 This diagram illustrates a method for refreshing the resolution and displaying the image using a driver chip.

[0027] Figure 3 This diagram illustrates the specific steps involved in refreshing the resolution and displaying the image using the driver chip. Detailed Implementation

[0028] The specific embodiments of the present invention are described below to enable those skilled in the art to understand the present invention. However, it should be understood that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, various changes are obvious as long as they are within the spirit and scope of the present invention as defined and determined by the appended claims. All inventions utilizing the concept of the present invention are protected.

[0029] like Figure 1 As shown, in one embodiment of the present invention, a refresh method for a variable resolution panel source circuit, applied to a driver chip, includes:

[0030] S1. Receive display configuration information from the host computer; the configuration information includes the number of first PADs corresponding to the display panel and the relative position information of the first PADs; the number of first PADs is less than or equal to the number of second PADs on the driver chip;

[0031] S2. Based on the configuration information and the attribute information of the driver chip, determine the position information of the target PAD in the second PAD corresponding to the driver chip; the attribute information of the driver chip includes the number and position information of the first PAD on the driver chip;

[0032] S3. Based on the location information of the target PAD, change the working state of the target PAD to complete the resolution refresh.

[0033] In S1, the first PAD corresponding to the display panel is the PAD of the valid connection of the current refresh line on the display panel;

[0034] When the display panel is an irregularly shaped panel, the effective connected PADs are the PADs that display the lit sub-pixels of the current row; and the number and relative position of the first PADs are related to the row in which the display is located.

[0035] When the display panel is not an irregularly shaped panel, the PADs with valid connections are equivalent to all rows, and all PADs on the display panel are the first PADs.

[0036] The second PAD is the PAD on the source display driver chip.

[0037] Since the spacing between the PADs is the same, determining the number allows us to determine their relative positional relationships. Therefore:

[0038] In step S2, when the display panel is symmetrical, the position information of the target PAD is obtained by the driver chip based on the symmetry property and the number of the first PADs, with the central axis as the center of symmetry.

[0039] When the display panel is asymmetrical, the position information of the target PAD is determined by the number of first PADs to the left and right of any line, and the offset of the central axis is determined. The driver chip parses the position of the target PAD by the offset of the central axis and the number of first PADs. The position information of the target PAD corresponds to the first PAD of the current display row.

[0040] In S3, the method for changing the working state of the target PAD is as follows: the driver chip controls the target PAD to change from the working state to the low power / non-working state, so that the output of the target PAD is a low level of hiz or vss.

[0041] In step S3, when the display panel is an irregularly shaped panel, the resolution is refreshed line by line, and the first PAD of the current row is matched in different rows respectively.

[0042] When the display panel is not an irregularly shaped panel, the resolution is refreshed frame by frame or refreshed globally once.

[0043] In this embodiment, the driver chip includes an electrically connected source control circuit and a fully custom source circuit;

[0044] The source control circuit is used to generate a source signal and output it to the source fully customized circuit.

[0045] The source fully custom circuit is used to receive the source signal and generate a sequence of pulses;

[0046] The sequence pulse includes several pulse signals, each pulse signal corresponding to a PAD on the driver chip. The target PAD is selected by the PAD selection signal latched by the pulse signal, and the working state of the circuit corresponding to the target PAD is changed.

[0047] like Figure 2 and Figure 3 As shown, in one embodiment of the present invention, the source control circuit includes a flip-flop and an AND gate for generating a source signal. The source signal (shift_en) is transmitted step by step in the circuit control module to generate a sequence of pulses enabling the latch group step by step. Figure 2 In the data bus, data_bus represents the data bus group used to receive signals from the host computer, and clk_shift is the clock signal.

[0048] The source fully custom circuitry includes digital circuitry and analog circuitry. The digital circuitry includes, for example: Figure 2 The digital circuit shown includes a display section comprising a first-level digital grayscale data latch, a second-level digital grayscale data latch, and a third-level digital grayscale data latch connected in sequence.

[0049] The analog circuit section includes, for example: Figure 2 The analog circuit shown includes a level shifter, a digital-to-analog converter, and a driver module connected in sequence.

[0050] For the target PAD, the source control circuit also generates a PAD selection signal (PAD_EN), which is used to turn off the target PAD;

[0051] The sequence of pulses enabling the latch group is latched in the latch of the target PAD corresponding to the PAD selection signal;

[0052] When the latched PAD selection signal is high, the PAD is selected. The PAD selection signal changes the state of the pulse generation signal in the circuit corresponding to the PAD, so that no pulse is generated subsequently and no data is latched in the display area. The PAD selection signal changes the analog drive module in the circuit corresponding to the PAD, and enters a low-power state. The PAD output is hiz or vss.

[0053] For the target PAD, the PAD selection signal can latch the pulse generation circuit corresponding to the PAD, thereby preventing the generation of the first-stage latch trigger pulse and achieving energy saving.

[0054] For non-target PADs, the method for displaying a refreshed resolution image includes the following steps:

[0055] The first-level data latch group receives the digital grayscale signal (verf_gary) and the pulse enable of the latch group, and latches / releases the digital grayscale signal sequentially according to the pulse enable group of the latch;

[0056] The second-stage latch group latches the digital grayscale signal released by the first-stage latch group, and when the pulse enable (Latch2_en) of the second-stage latch group arrives, all digital grayscale signals are released simultaneously.

[0057] The third-level latch group latches the digital grayscale signal released by the second-level latch group, and when the pulse enable (Latch3_en) of the third-level latch group arrives, all digital grayscale signals are released simultaneously. The simultaneous release of all digital grayscale signals by the third-level latch group is used as parallel output data.

[0058] The parallel output data is transferred to the medium voltage domain by a level conversion circuit to obtain the medium sub-domain signal;

[0059] The Central Asia domain signal is converted into analog display configuration information using a digital-to-analog converter;

[0060] The driver unit amplifies the previous stage analog signal and fixes the output state of the PAD and the analog display configuration information (Buf_state_ctrl) according to the resolution information. The driver outputs a valid grayscale signal through the non-target PAD to light up the corresponding sub-pixel on the driver panel, thus completing the display of the refreshed resolution image.

[0061] The digital grayscale signal, the pulse enable of the second-level latch group, and the pulse enable of the third-level latch group all come from the host computer.

[0062] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A refresh method for a variable resolution panel source circuit, characterized in that, Applied to driver chips, including: S1. Receive display configuration information from the host computer; the configuration information includes the number of first PADs corresponding to the display panel and the relative position information of the first PADs; the number of first PADs is less than or equal to the number of second PADs on the driver chip; S2. Based on the configuration information and the attribute information of the driver chip, determine the position information of the target PAD in the second PAD corresponding to the driver chip; the attribute information of the driver chip includes the number and position information of the first PAD on the driver chip; S3. Based on the location information of the target PAD, change the working state of the target PAD to complete the resolution refresh; In S1, the first PAD corresponding to the display panel is the PAD of the valid connection of the current refresh line on the display panel; When the display panel is an irregularly shaped panel, the effective connected PAD is the PAD that displays the lit sub-pixel of the current row; When the display panel is not an irregularly shaped panel, the PADs with valid connections are equivalent to all rows, and all PADs on the display panel are the first PADs. The second PAD is the PAD on the source display driver chip; In step S3, when the display panel is an irregularly shaped panel, the resolution is refreshed line by line, and the first PAD of the current row is matched in different rows respectively. When the display panel is not an irregularly shaped panel, the resolution is refreshed frame by frame or refreshed globally once.

2. The refresh method for the variable resolution panel source circuit according to claim 1, characterized in that, In step S2, when the display panel is symmetrical, the position information of the target PAD is obtained by the driver chip based on the symmetry property and the number of the first PADs, with the central axis as the center of symmetry. When the display panel is asymmetrical, the position information of the target PAD is determined by the number of first PADs to the left and right of any line, and the offset of the central axis is determined. The driver chip parses the position of the target PAD by the offset of the central axis and the number of first PADs. The position information of the target PAD corresponds to the first PAD of the current display row.

3. The refresh method for the variable resolution panel source circuit according to claim 1, characterized in that, In S3, the method for changing the working state of the target PAD is as follows: the driver chip controls the target PAD to change from the working state to the low power / non-working state, so that the output of the target PAD is a low level of hiz or vss.

4. The refresh method of the variable resolution panel source circuit according to any one of claims 1 to 3, wherein the driving chip includes an electrically connected source control circuit and a fully customized source circuit; The source control circuit is used to generate a source signal and output it to the source fully custom circuit. The source fully custom circuit is used to receive the source signal and generate a sequence of pulses; The sequence pulse includes several pulse signals, each pulse signal corresponding to a PAD on the driver chip. The target PAD is selected by the PAD selection signal latched by the pulse signal, and the working state of the circuit corresponding to the target PAD is changed.

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