Display driving chip, OLED display and display driving method

Abstract

The present application proposes a display driver chip, an OLED display, and a display driver method. The display driver chip includes: a frame memory for writing multiple frames of RGB pixel data of a display panel; a rounding processor for obtaining multiple frames of RGB pixel data from the frame memory; an accident processor connected to the rounding processor, and identifying the black state area of ​​the display panel according to the multiple frames of RGB pixel data read by the rounding processor; and, for the black state area of ​​the display panel, the rounding processor stops the read and write operations from the frame memory, and controls the signal amplifier to be in an inactive state. The present application can reduce the power consumption of the non-display area, which is conducive to extending the battery life, and can be applied to the display of various shapes of interfaces.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display driver chip, an OLED (Organic Light-Emitting Diode) display, and a display driving method. Background Art

[0002] OLED display is a display technology with great development prospects. It not only has excellent display performance, but also has the characteristics of self-luminescence, simple structure, ultra-lightness, fast response speed, wide viewing angle, low power consumption and flexible display. It is known as the "dream display". In addition, its production equipment investment is far less than that of liquid crystal display (Liquid Crystal Display, LCD), which has been favored by major display manufacturers and has become the main force of the third generation of display devices in the display field.

[0003] With the popularity of various smart devices and applications (APP), in order to support display interfaces of various shapes, OLED display panels have added CRP (Circle-Rounding Processor). CRP is generally used to control the non-display area, that is, the non-display area is always displayed as black, and some data is refined in units of sub-pixels at the boundary with the display area of ​​the corresponding shape, while the display area of ​​the corresponding shape is still displayed according to the traditional driving method. This CRP driving method still needs to apply the level required to display the black screen to the sub-pixels in the non-display area, obtain the RGB pixel data of the non-display area, and the signal amplifier is also in an activated state. These power consumptions will shorten the battery life. Summary of the invention

[0004] In view of this, the present application provides a display driver chip, an OLED display and a display driver method, which can improve the problem that the power consumption in the non-display area of ​​the CRP driving method will shorten the battery life.

[0005] The present application provides a display driver chip, comprising:

[0006] A frame memory, used for writing multiple frames of RGB pixel data of a display panel;

[0007] A rounding processor is used to obtain the multiple frames of RGB pixel data from the frame memory;

[0008] an accident processor connected to the rounding processor, and identifying a black state area of ​​the display panel according to the multiple frames of RGB pixel data read by the rounding processor; and

[0009] For the black state area of ​​the display panel, the rounding processor stops the read and write operations from the frame memory, and controls the signal amplifier to be in an inactive state, wherein the signal amplifier is used to amplify the received display signal carrying RGB pixel data.

[0010] Optionally, the accident processor is used to send a read / write control signal to the rounding processor, so as to instruct the rounding processor to stop the read / write operation from the frame memory through the read / write control signal.

[0011] Optionally, the frame memory is a static storage array, and the accident processor sends a control signal to a power controller connected between the power generator and the static storage array to instruct the power generator to output a preset voltage, which is less than the minimum voltage required for the static storage array to save data.

[0012] Optionally, the accident processor is a central processor of the display panel.

[0013] Optionally, the rounding processor obtains the multiple frames of RGB pixel data from the frame memory through a full read operation.

[0014] The present application provides an OLED display, comprising a display panel and a display driver chip as described in any one of the above items, wherein the display driver chip is used to control the display panel to display images.

[0015] The present application provides a display driving method, comprising:

[0016] The frame memory writes multiple frames of RGB pixel data of the display panel;

[0017] The rounding processor obtains the multiple frames of RGB pixel data from the frame memory;

[0018] The accident processor identifies the black state area of ​​the display panel according to the multiple frames of RGB pixel data read by the rounding processor; and

[0019] For the black state area of ​​the display panel, the rounding processor stops the read and write operations from the frame memory, and controls the signal amplifier to be in an inactive state, wherein the signal amplifier is used to amplify the received display signal carrying RGB pixel data.

[0020] Optionally, the rounding processor stops the reading and writing operations from the frame memory, including:

[0021] The accident processor sends a read / write control signal to the rounding processor, and instructs the rounding processor to stop the read / write operation from the frame memory through the read / write control signal.

[0022] Optionally, the frame memory is a static storage array, and the rounding processor stops reading and writing operations from the frame memory, including:

[0023] The accident processor sends a control signal to a power controller connected between a power generator and a static storage array, instructing the power generator to output a preset voltage, wherein the preset voltage is less than a minimum voltage required by the static storage array to save data, thereby stopping the read and write operations from the frame memory.

[0024] Optionally, the rounding processor obtains the multiple frames of RGB pixel data from the frame memory through a full read operation.

[0025] As described above, the present application adds an ARD (Accident-Rounding Device). The ARD identifies the black area of ​​the display panel based on the multi-frame RGB pixel data read by the CRP. The black area can be regarded as a non-display area. For the black area of ​​the display panel, the ARD controls the CRP to stop the read and write operations from the frame memory, and controls the signal amplifier to be in an inactive state, so that there is no need to apply the levels required for display, such as reading and writing, signal amplification, etc. to the black area, thereby reducing the power consumption of the non-display area, which is beneficial to extending the battery life and can be applied to the display of various shape interfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of a display driver chip provided in an embodiment of the present application;

[0027] Figure 2 A flow chart of a display driving method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly described below in conjunction with specific embodiments and corresponding drawings. Obviously, the embodiments described below are only part of the embodiments of the present application, not all of the embodiments. In the absence of conflict, the following embodiments and their technical features can be combined with each other and also belong to the technical solutions of the present application.

[0029] Please also read Figure 1 As shown, a display driver chip 1 provided in an embodiment of the present application includes a frame memory 11 , a CRP 12 , an ARD 13 and a signal amplifier 14 .

[0030] The frame memory 11 is used to write multiple frames of RGB pixel data of the display panel. The so-called multiple frames of RGB pixel data can be RGB data of all frames to be displayed by the display panel within a preset period of time. The preset period of time can be a part of a complete image (such as a picture or image when an APP is running) or the entire period of the complete image.

[0031] The CRP 12 is connected to the frame memory 11 and is used to obtain multiple frames of RGB pixel data from the frame memory 11. For example, the CRP 12 obtains multiple frames of RGB pixel data from the frame memory through a full read operation, that is, the CRP 12 can read multiple frames of RGB pixel data stored in the frame memory 11 at one time.

[0032] ARD 13 is connected to CRP 12, and identifies whether there is a black state area of ​​the display panel according to the multiple frames of RGB pixel data read by CRP 12. The black state area can be understood as a non-display area, or a normally black area, which always displays black in the period corresponding to the multiple frames of RGB pixel data.

[0033] If no black area is identified in the display panel, the CRP 12 sends the read multiple frames of RGB pixel data to the signal amplifier 14 according to the display timing. The signal amplifier 14 amplifies the received display signal carrying the RGB pixel data and transmits it to the corresponding pixel for display.

[0034] If it is identified that there is a black area in the display panel, the CRP 12 stops the read and write operations from the frame memory 11 for the black area of ​​the display panel, and controls the signal amplifier 14 to be in an inactive state, thereby eliminating the need to apply the levels required for display, such as read and write, and signal amplification, to the black area, thereby reducing power consumption in the non-display area, which is beneficial for extending battery life and can be applied to the display of various shape interfaces.

[0035] It should be noted that this operation is only applicable to black areas. Even if there are areas in the display area of ​​the display panel that appear black, this method is not used, but a traditional driving method is used.

[0036] CRP 12 stops the read and write operations from the frame memory, optionally including at least one of the following methods:

[0037] Mode 1: ARD 13 sends a read / write control signal to CRP 12, and instructs CRP 12 to stop the read / write operation from frame memory 11 through the read / write control signal.

[0038] Mode 2: If the frame memory 11 is a static random-access memory (SRAM), the ARD 13 sends a control signal to a power controller connected between the power generator and the static memory array 11, instructing the power generator to output a preset voltage, which is less than the minimum voltage required for the static memory array 11 to save data, thereby stopping the read and write operations from the frame memory 11.

[0039] Mode 3: If the frame memory 11 is a static memory array, the ARD 13 sends a control signal to a power controller connected between the power generator and the static memory array 11, instructing the power generator to stop outputting voltage, thereby powering off the static memory array 11 and making it impossible to write or read any data, thereby causing the CRP 12 to stop reading and writing operations from the frame memory 11.

[0040] In an actual scenario, the ARD 13 may be a central processing unit (CPU) of the display panel, and / or the CRP 12 may also be a central processing unit.

[0041] The embodiment of the present application also provides an OLED display, comprising a display panel and a display driver chip 1 as described in any one of the above, wherein the display driver chip 1 is used to control the display panel to display images, thereby producing the beneficial effects of the display driver chip 1 of the corresponding embodiment.

[0042] The display driver chip 1 and / or OLED display of the embodiment of the present application can adopt the following Figure 2 The display driving method shown drives pixels to display images.

[0043] The display driving method includes the following steps S11 to S14.

[0044] S11: The frame memory writes multiple frames of RGB pixel data of the display panel.

[0045] S12: The CRP obtains multiple frames of RGB pixel data from the frame memory. Optionally, the CRP obtains multiple frames of RGB pixel data from the frame memory through a full read operation.

[0046] S13: ARD identifies the black state area of ​​the display panel according to the multiple frames of RGB pixel data read by the CRP.

[0047] S14: For the black state area of ​​the display panel, the CRP stops the read and write operations from the frame memory, and controls the signal amplifier to be in an inactive state, wherein the signal amplifier is used to amplify the received display signal carrying RGB pixel data.

[0048] The CRP stops the read and write operations from the frame memory, optionally including at least one of the following methods:

[0049] Mode 1: ARD sends a read / write control signal to CRP, and instructs CRP to stop the read / write operation from the frame memory through the read / write control signal.

[0050] Mode 2: If the frame memory is a static storage array, ARD sends a control signal to a power controller connected between the power generator and the static storage array, instructing the power generator to output a preset voltage, which is less than the minimum voltage required for the static storage array to save data, thereby stopping the read and write operations from the frame memory.

[0051] Mode 3: If the frame memory is a static memory array, ARD sends a control signal to a power controller connected between the power generator and the static memory array, instructing the power generator to stop outputting voltage, thereby powering off the static memory array and making it impossible to write or read any data, thereby causing CRP to stop reading and writing operations from the frame memory.

[0052] For the black area of ​​the display panel, ARD controls CRP to stop the read and write operations from the frame memory, and controls the signal amplifier to be in an inactive state, so that there is no need to apply the levels required for display, such as reading and writing, and signal amplification, to the black area, thereby reducing the power consumption of the non-display area, which is beneficial to extending the battery life and can be applied to the display of various shapes of interfaces.

[0053] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. For ordinary technicians in this field, all equivalent structural changes made using the contents of this specification and drawings are also included in the patent protection scope of the present application.

[0054] Although the terms "first, second", etc. are used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. In addition, the singular forms "one", "an", and "the" are intended to include plural forms as well. The terms "or" and "and / or" are interpreted as inclusive, or mean any one or any combination. Only when the combination of elements, functions, steps, or operations is inherently mutually exclusive in some way, an exception to this definition will occur.

Claims

1. A display driver chip, characterized in that: include: A frame memory, which is a static memory array SRAM and is used to write multiple frames of RGB pixel data of the display panel, wherein the multiple frames of RGB pixel data are the entire time period of a complete image; A rounding processor, which obtains the multiple frames of RGB pixel data from the frame memory through a full read operation; An accident processor is connected to the rounding processor and identifies a black state area of ​​the display panel according to the multiple frames of RGB pixel data read by the rounding processor; as well as, For the black state area of ​​the display panel, the rounding processor stops the read and write operations from the frame memory, and controls the signal amplifier to be in an inactive state, wherein the signal amplifier is used to amplify the received display signal carrying RGB pixel data.

2. The display driver chip according to claim 1, characterized in that: The accident processor is used to send a read / write control signal to the rounding processor, so as to instruct the rounding processor to stop the read / write operation from the frame memory through the read / write control signal.

3. The display driver chip according to claim 1, characterized in that: The accident processor sends a control signal to a power controller connected between a power generator and a static storage array to instruct the power generator to output a preset voltage, wherein the preset voltage is less than a minimum voltage required by the static storage array to store data.

4. The display driver chip according to any one of claims 1 to 3, characterized in that: The accident processor is the central processor of the display panel.

5. An OLED display, characterized in that: It comprises a display panel and a display driver chip as claimed in any one of claims 1 to 4, wherein the display driver chip is used to control the display panel to display images.

6. A display driving method, characterized in that: include: The frame memory writes multiple frames of RGB pixel data of the display panel, wherein the frame memory is a static memory array SRAM, and the multiple frames of RGB pixel data are all time periods of a complete image; The rounding processor obtains the multiple frames of RGB pixel data from the frame memory through a full read operation; The accident processor identifies the black state area of ​​the display panel according to the multiple frames of RGB pixel data read by the rounding processor; as well as, For the black state area of ​​the display panel, the rounding processor stops the read and write operations from the frame memory, and controls the signal amplifier to be in an inactive state, wherein the signal amplifier is used to amplify the received display signal carrying RGB pixel data.

7. The method according to claim 6, characterized in that The rounding processor stops the reading and writing operations from the frame memory, including: The accident processor sends a read / write control signal to the rounding processor, and instructs the rounding processor to stop the read / write operation from the frame memory through the read / write control signal.

8. The method according to claim 6, characterized in that The frame memory is a static storage array, and the rounding processor stops the reading and writing operations from the frame memory, including: The accident processor sends a control signal to a power controller connected between a power generator and a static storage array, instructing the power generator to output a preset voltage, wherein the preset voltage is less than a minimum voltage required by the static storage array to save data, thereby stopping the read and write operations from the frame memory.

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