CN113066442A - Control system of AMOLED display screen - Google Patents
Control system of AMOLED display screen Download PDFInfo
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- CN113066442A CN113066442A CN202110271799.8A CN202110271799A CN113066442A CN 113066442 A CN113066442 A CN 113066442A CN 202110271799 A CN202110271799 A CN 202110271799A CN 113066442 A CN113066442 A CN 113066442A
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- brightness
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0286—Details of a shift registers arranged for use in a driving circuit
Abstract
The invention discloses a control system of an AMOLED display screen, which comprises: the main control chip sends an image display signal and a brightness control signal; the driving chip receives the image display signal and the brightness control signal, and sends a data signal, a scanning control signal and a brightness signal to the AMOLED display screen; the main control chip is provided with two types; the driving chip comprises a register which stores a corresponding relation table of the refresh frame number and the brightness value; and when the main control chip is switched to the second display mode, the main control chip stops sending the brightness control signal and optionally sends an image display signal, and the driving chip selects display data from the register to update the data of the AMOLED display screen. The invention has the advantages that the register is arranged in the driving chip and the frame number-brightness comparison table is stored, so that the main control chip does not need to send the brightness control signal and the image display signal in real time, the power consumption is reduced on the basis of ensuring the display effect, the light-emitting time of the pixel is reduced, and the screen burning phenomenon of the display screen is delayed.
Description
Technical Field
The invention relates to the field of AMOLED display, in particular to a control system of an AMOLED display screen.
Background
In recent years, with the development of display technology and the application of new materials, AMOLED display screens have become widely popular.
In the field of existing display technologies, many manufacturers research out many new applications based on the inherent characteristics of the AMOLED display screen, such as using the AMOLED to control the light emission and turn-off of a single pixel to achieve higher contrast, performing finer brightness control, such as using the AMOLED to achieve information display, reducing the overall power consumption of the display screen in specific requirements, or using the AMOLED to achieve a flexible display screen, and so on.
In the display technology of the information screen, the prior art usually selects a low-brightness or low-frame-rate display scheme, or adopts the same brightness as that of normal display, resulting in the disadvantages of poor display effect or low power consumption, etc.
Disclosure of Invention
In view of the above problems in the prior art, a control system for an AMOLED display screen is provided.
The specific technical scheme is as follows:
a control system of an AMOLED display screen, comprising: a main control chip for sending image display signal and brightness control signal; the driving chip receives the image display signal and the brightness control signal sent by the main control chip and sends a data signal, a scanning control signal and a brightness signal to the AMOLED display screen; the main control chip is provided with a first display mode and a second display mode; the driving chip comprises a register, and a corresponding relation table of the refresh frame number and the brightness value is stored in the register; when the main control chip is switched to the second display mode, the main control chip stops sending the brightness control signal and optionally sends the image display signal, and the driving chip selects display data from the register to update the data of the AMOLED display screen.
Preferably, the step of the driving chip selecting the display data from the register to update the data of the AMOLED display screen includes:
step S1: the driving chip records the current refreshing frame number from a starting point;
step S2: searching a corresponding brightness value from the corresponding relation table according to the current refreshing frame number;
step S3: refreshing the AMOLED display screen according to the brightness value;
step S4: and judging whether the current refresh frame number reaches a threshold value, if not, repeating the step S2, and if so, repeating the step S1.
Preferably, the comparison relationship between the refresh frame number and the brightness value in the correspondence table is a power function relationship or a linear function relationship.
Preferably, the number of the refresh frames in the correspondence table is provided with a first section and a second section, and a boundary between the first section and the second section is referred to as a first node;
the first interval range is from the starting point to the first node, and when the value of the refresh frame number is in the first interval, the function contrast relation between the refresh frame number and the brightness value is a monotone decreasing function;
and the second interval range is from the first node to the threshold value, and when the value of the refresh frame number is in the second interval, the function contrast relation between the refresh frame number and the brightness value is a monotone increasing function.
Preferably, the brightness value in the correspondence table is greater than the lowest display brightness of the AMOLED display screen and less than the peak brightness of the AMOLED display screen.
Preferably, the base number of the power function relationship is the refresh frame number, and the exponent value includes:
when the function contrast relation is increased, taking the value of an index [0, 2.2 ];
and when the function contrast relation is decreased progressively, taking the index as [0, 1/2.2 ].
Preferably, the main control chip continuously transmits the image display signal in the second display mode, or transmits the image display signal at intervals.
Preferably, the display data includes a clock and a calendar and the brightness value.
Preferably, the first display mode is a normal display mode, and the second display mode is a message screen display mode.
The technical scheme has the following advantages or beneficial effects:
the register is arranged in the driving chip and the frame number-brightness comparison table is stored, so that the main control chip does not need to send brightness control signals and image display signals in real time, power consumption is reduced on the basis of ensuring the display effect, the light emitting time of pixels is shortened, and the screen burning phenomenon of the display screen is delayed.
Drawings
Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and are not restrictive of the scope of the invention.
FIG. 1 is an overall schematic diagram of an embodiment of the present invention;
FIG. 2 is a flow chart of updating brightness values of a display screen according to an embodiment of the present invention;
FIG. 3 is a graph showing the frame number and brightness comparison relationship according to the embodiment of the present invention;
FIG. 4 is an example of actual sampling for an embodiment of the present invention;
fig. 5 is a schematic power consumption diagram of various aspects of an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
The invention includes a control system for an AMOLED display screen, as shown in fig. 1, comprising: a main control chip 1 for sending image display signal 5 and brightness control signal 6; the driving chip 2 receives the image display signal 5 and the brightness control signal 6 sent by the main control chip 1, and sends a data signal 8, a scanning control signal 9 and a brightness signal 10 to the AMOLED display screen 3; the main control chip 1 is provided with a first display mode and a second display mode; the driving chip 2 comprises a register 4, and a corresponding relation table 7 of the number of refreshing frames and the brightness value is stored in the register 4; when the main control chip 1 is switched to the second display mode, the main control chip 1 stops sending the brightness control signal 6, and optionally sends the image display signal 5, and the driving chip 2 selects display data from the register 4 to update the data of the AMOLED display screen 3.
In a preferred embodiment, as shown in fig. 2, the step of the driver chip 2 selecting the display data from the register 4 to update the data of the AMOLED display screen includes:
step S1: the driving chip 2 records the current refreshing frame number from a starting point;
step S2: searching a corresponding brightness value from the corresponding relation table 7 according to the current refreshing frame number;
step S3: refreshing the AMOLED display screen according to the brightness value;
step S4: and judging whether the current refresh frame number reaches a threshold value, if not, repeating the step S2, and if so, repeating the step S1.
In a preferred embodiment, the comparison relationship between the refresh frame number and the brightness value in the correspondence table 7 is a power function relationship or a linear function relationship.
In a preferred embodiment, the refresh frame number in the correspondence table 7 is provided with a first section and a second section, and a boundary between the first section and the second section is referred to as a first node;
the first interval range is from a starting point to a first node, and when the value of the refresh frame number is in the first interval, the function contrast relation between the refresh frame number and the brightness value is a monotone decreasing function;
the second interval range is from the first node to the threshold value, and when the refresh frame number value is in the second interval, the function contrast relation between the refresh frame number and the brightness value is a monotone increasing function.
In a preferred embodiment, the brightness value in the correspondence table is greater than the lowest display brightness of the AMOLED display screen and less than the peak brightness of the AMOLED display screen.
Specifically, as shown in fig. 3, 0 is the lowest display luminance, 1 is the peak luminance, bright (m) to bright (1) are luminance values, fstep (m) is the first node, and fstep (n) is the maximum value. As is evident from FIG. 3, as the value of fstep (x) increases, the value of bright (y) decreases gradually from bright (1) to bright (m), and when fstep (x) is located between fstep (m-1) and fstep (m), bright (y) reaches the lowest display luminance bright (m), and then fstep (x) increases gradually to fstep (n), bright (y) increases to bright (1).
In a preferred embodiment, as shown in fig. 4, the value of bright (1) is 100% display brightness, and the value of bright (m) is 10% display brightness, and the corresponding sampling effect is as shown in the figure.
In a preferred embodiment, as shown in fig. 4, the base value of the power function relationship includes:
when the function contrast relation is increased, the index takes a value of [0, 2.2 ];
when the function contrast relation is decreased, the index takes the value of [0, 1/2.2 ].
Further, as shown in fig. 4, the power consumption of the existing scheme is approximately equal to the sum of the power consumption areas 1, 2, 3, 4 and 5 within a fixed time; in the scheme 1, the power consumption of the linear function relation at the same fixed time is approximately equal to the sum of the power consumption areas 2, 3, 4 and 5; scheme 2, i.e. the power consumption of the power function relation at the same fixed time is approximately equal to the sum of power consumption regions 4 and 5. Therefore, the display mode provided by the invention can effectively reduce the power consumption of the AMOLED display screen in the second display mode. In addition, through the actual test of testers, the transition effect of the scheme 2 is most natural, and the display effect is better.
In a preferred embodiment, the main control chip 1 transmits the image display signal 5 continuously in the second display mode, or transmits the image display signal 5 at intervals.
In a preferred embodiment, the display data includes a clock and calendar and brightness values.
In a preferred embodiment, the first display mode is a normal display mode, and the second display mode is a message screen display mode.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (9)
1. A control system of an AMOLED display screen, comprising:
a main control chip for sending image display signal and brightness control signal;
the driving chip receives the image display signal and the brightness control signal sent by the main control chip and sends a data signal, a scanning control signal and a brightness signal to the AMOLED display screen;
the main control chip is provided with a first display mode and a second display mode;
the driving chip comprises a register, and a corresponding relation table of the refresh frame number and the brightness value is stored in the register;
when the main control chip is switched to the second display mode, the main control chip stops sending the brightness control signal and optionally sends the image display signal, and the driving chip selects display data from the register to update the data of the AMOLED display screen.
2. The control system according to claim 1, wherein the step of the driver chip selecting the display data from the register to update the data of the AMOLED display screen comprises:
step S1: the driving chip records the current refreshing frame number from a starting point;
step S2: searching a corresponding brightness value from the corresponding relation table according to the current refreshing frame number;
step S3: refreshing the AMOLED display screen according to the brightness value;
step S4: and judging whether the current refresh frame number reaches a threshold value, if not, repeating the step S2, and if so, repeating the step S1.
3. The control system according to claim 1, wherein the comparison relationship between the refresh frame number and the luminance value in the correspondence table is a power function relationship or a linear function relationship.
4. The control system according to claim 1, wherein the refresh frame number in the correspondence table is provided with a first section and a second section, and a boundary between the first section and the second section is referred to as a first node;
the first interval range is from the starting point to the first node, and when the value of the refresh frame number is in the first interval, the function contrast relation between the refresh frame number and the brightness value is a monotone decreasing function; and the second interval range is from the first node to the threshold value, and when the value of the refresh frame number is in the second interval, the function contrast relation between the refresh frame number and the brightness value is a monotone increasing function.
5. The control system of claim 1, wherein the brightness values in the correspondence table are greater than the lowest display brightness of the AMOLED display screen and less than the peak brightness of the AMOLED display screen.
6. The low power consumption display method according to claim 3, wherein the base of the power function relationship is the refresh frame number, and the exponent value includes:
when the function contrast relation is increased, taking the value of an index [0, 2.2 ];
and when the function contrast relation is decreased progressively, taking the index as [0, 1/2.2 ].
7. The control system of claim 1, wherein the main control chip continuously transmits the image display signal in the second display mode or transmits the image display signal at intervals.
8. The control system of claim 1, wherein the display data includes a clock and calendar and the brightness value.
9. The control system according to claim 1, wherein the first display mode is a normal display mode, and the second display mode is a breath screen display mode.
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| CN202110271799.8A CN113066442B (en) | 2021-03-12 | 2021-03-12 | Control system of AMOLED display screen |
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| CN202110271799.8A CN113066442B (en) | 2021-03-12 | 2021-03-12 | Control system of AMOLED display screen |
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