CN111489690A - Gray data display method - Google Patents

Gray data display method Download PDF

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Publication number
CN111489690A
CN111489690A CN202010356558.9A CN202010356558A CN111489690A CN 111489690 A CN111489690 A CN 111489690A CN 202010356558 A CN202010356558 A CN 202010356558A CN 111489690 A CN111489690 A CN 111489690A
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China
Prior art keywords
data
remainder
coefficient
display
integer
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Withdrawn
Application number
CN202010356558.9A
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Chinese (zh)
Inventor
徐银森
张宏根
李小东
杨林
颜色金
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Sichuan Suining Lipuxin Microelectronic Co ltd
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Sichuan Suining Lipuxin Microelectronic Co ltd
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Application filed by Sichuan Suining Lipuxin Microelectronic Co ltd filed Critical Sichuan Suining Lipuxin Microelectronic Co ltd
Priority to CN202010356558.9A priority Critical patent/CN111489690A/en
Publication of CN111489690A publication Critical patent/CN111489690A/en
Priority to CN202110387832.3A priority patent/CN112837652B/en
Priority to CN202110384076.9A priority patent/CN113012635B/en
Withdrawn legal-status Critical Current

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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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping

Abstract

The invention discloses a gray data display method, which comprises the following steps: 1): storing common integer data of gray data received from outside in a memory, residue data of the gray data being divided into N groups, wherein each group of residue data is weighted by the same residue weight WRDifferent coefficient of residue RiComposition is carried out; 2): multiplying the common integer data by the display times M and the remainder coefficient R of each group of remainder dataiMultiplying by the remainder weight WRThe gray data are formed by superposition; 3): transmitting the gray scale data obtained in the step 2) to a PWM generating device to generate a PWM pulse signal for driving a display device to display. By the mode, the occupied space of remainder data in the memory is reduced, and the chip cost is reduced.

Description

Gray data display method
Technical Field
The invention relates to L ED display screen display technology, in particular to a gray scale data display method.
Background
L ED display screen has advantages of high gray scale, wide visual angle, rich color and customizable screen shape, and is widely used in industry, traffic, commercial advertisement and other fields, in the middle and high-order display screen, a constant current source driving chip capable of outputting high refresh PWM is usually adopted, such chip usually receives and stores gray scale data, and then PWM generating device is used to generate PWM driving signal.
Disclosure of Invention
The invention aims to provide a gray data display method, which stores integer data in a memory and transmits the integer data and remainder data to a PWM (pulse width modulation) generating device at the same time to generate PWM pulses, thereby reducing the space occupied by the remainder data in the memory and reducing the cost.
To solve the above technical problem, the present invention provides a gray scale data display method, including: 1): storing common integer data of gray data received from outside in a memory, residue data of the gray data being divided into N groups, wherein each group of residue data is weighted by the same residue weight WRDifferent coefficient of residue RiComposition is carried out; 2): multiplying the common integer data by the display times M and the remainder coefficient R of each group of remainder dataiMultiplying by the remainder weight WRThe gray data are formed by superposition; 3): transmitting the gray scale data obtained in the step 2) to a PWM generating device to generate a PWM pulse signal for driving a display device to display.
By adopting the technical scheme, the memory is used for storing the integer data and sending the integer data and the remainder data to the PWM generating device to generate the PWM pulse signal to drive the display device to display, wherein the memory is used for storing the integer data, and the remainder data is received and displayed while reading the integer data, so that the space occupied by the remainder data part of the memory is reduced, and the cost of a chip is further reduced.
In the gray scale data display method, each group of remainder data consists of the remainder weight and the nbit remainder coefficient.
In the gray scale data display method, each group of residue data consists of residue weight and 1bit or 2bit residue coefficient.
In the gray scale data display method, the common integer data is composed of the product of the common integer Q and the display times M.
In the gray scale data display method, the remainder weight W of the remainder dataRIs any one of 1, 2, 4, 8, and 16.
In the gray data display method, the bit width of the common integer data is at least 3 bits, and the integer memory stores at least 4 rows of integer data.
In the gray scale data display method, the public integer data and the remainder coefficient data are sent at different time intervals, and the public integer data and the remainder coefficient data are sent to the PWM generating device to be combined with the remainder weight W when the remainder coefficient data are receivedRTo generate a PWM pulse signal.
According to the gray data display method, when the remainder coefficient is 1bit, the common integer data are displayed circularly in each group of display periods, and whether the remainder data are displayed in each group of display periods is determined according to the numerical value of the remainder coefficient.
According to the gray data display method, when the remainder coefficient is larger than or equal to 2 bits, the public integer data are displayed circularly in each group of display periods, and whether the remainder data are displayed or partially displayed in each group of display periods is determined according to the numerical value of the remainder coefficient.
The method has the advantages that in the process of driving L ED display screen to display, integer data stored in the memory are read out and matched with the remainder coefficient to be sent to the PWM generating device in the chip to generate PWM pulse signals for driving the display device to display, only one memory is used for storing and reading the integer data to display, meanwhile, the remainder coefficient is received and combined with the remainder weight to generate the remainder data, and then the PWM pulse signals are generated by matching the integer data, so that the storage space of the driving chip is greatly reduced, and the cost is saved.
Drawings
FIG. 1 is a diagram illustrating an embodiment of a gray scale data display method according to the present invention;
FIG. 2 is a schematic diagram of PWM pulse signal generation according to a gray scale data display method of the present invention;
FIG. 3 is a schematic diagram of a receiving and displaying method of a gray scale data displaying method according to the present invention;
FIG. 4 is a schematic diagram illustrating a display effect of a gray scale data display method according to the present invention;
FIG. 5 is a schematic diagram of a display method of gray scale data according to the present invention.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
Referring to fig. 1 and 2, a gray data display method includes:
s01: 1): storing common integer data of gray data received from outside in a memory, residue data of the gray data being divided into N groups, wherein each group of residue data is weighted by the same residue weight WRDifferent coefficient of residue RiComposition is carried out;
s02: 2): multiplying the common integer data by the display times M and the remainder coefficient R of each group of remainder dataiMultiplying by the remainder weight WRThe gray data are formed by superposition;
s03: 3): transmitting the gray scale data obtained in the step 2) to a PWM generating device to generate a PWM pulse signal for driving a display device to display.
Further, as an alternative embodiment, each set of remainder data is composed of a remainder weight and a remainder coefficient of the nbit data. In other embodiments, as an alternative embodiment, each set of remainder data is composed of a remainder weight and a remainder coefficient of 1-bit or 2-bit data.
As further shown with reference to fig. 2 to 5, the common integer data is composed of the product of the common integer Q and the display times M. That is, the common integer data of the gray scale data is multiplied by the number M of display times in each display period by the common integer Q, and the remainder data of the gray scale data is multiplied by N sets of remainder coefficients R with the same weightiMultiplying by the remainder weight WRThen, the gradation data D can be expressed as:
Figure BDA0002473679710000031
wherein D is gray data, Q is a common integer, M is the number of times of display of the common integer data, and WRIs the remainder weight, RiIs the ith residue coefficient, and N is the residue data group number.
Further, as a preferred embodiment, the common integer data may further include a common integer Q, a display number M, and an integer weight WQThe product of (c). The gradation data D can be expressed as:
Figure BDA0002473679710000032
wherein, WQWeights for common portions of common integer data are extracted. By setting the integer weight W of the common integer dataQThe number of bits of the common integer data can be reduced.
Further, as an alternative embodiment, the remainder weight W of the remainder dataRIs any one of 1, 2, 4, 8, and 16.
Further, as an optional implementation manner, the bit width of the common integer data is at least 3 bits, and the integer memory stores at least 4 rows of integer data.
Further, as an optional implementation manner, the common integer data and the remainder coefficient data are sent in time segments, and when the remainder coefficient data are received, the common integer data and the remainder coefficient data are sent to the PWM generating device to be combined with the remainder weight WRTo generate a PWM pulse signal.
Further, as an optional implementation manner, when the data value of the remainder coefficient is 1bit, the common integer data is displayed cyclically in each group of display periods, and whether the remainder data is displayed in each group of display periods is determined according to the value of the remainder coefficient. For example, when receiving the remainder coefficient RiWhen the numerical value of (1) is equal to (1), the residue coefficient RiMultiplying by the remainder weight WRObtaining remainder data, displaying the remainder data together with the integer data, when receiving the remainder coefficient RiIf the value of (1) is 0, the remainder data obtained at this time is 0 or no remainder data is generated, and the remainder data is not displayed.
Further, as an alternative embodiment, when the data value of the remainder coefficient is greater than or equal to 2 bits, the common integer data is displayed cyclically in each group of display periods, and whether the remainder data is displayed or partially displayed in each group of display periods is determined according to the value of the remainder coefficient. For example, when receiving the remainder coefficient RiWhen the numerical value of (A) is 2bit or more than 2bit, the remainder coefficient RiMultiplying by the remainder weight WRThe remainder data may be displayed or not displayed together with the integer data and partially displayed in cooperation with the integer data. The remainder data is more flexible in matching with the integer data display process.
The display method disclosed by the invention receives the public integer data into the memory when receiving the gray data, then reads the integer data from the memory to transmit to the PWM generating device, and in the process, the remainder data is simultaneously received and is transmitted to the PWM generating device together with the public integer data to generate the PWM pulse signal. Wherein, the public integer data are displayed for M times in a circulating way, and the remainder data are according to the remainder weight W set by the upper computerRTransmit residue coefficient RiIn the PWM generating device in the chip, the PWM generating device generates the remainder weight W according to the setting of the upper computerRMultiplying by the remainder coefficient RiAnd generating a PWM pulse signal together with the integer data after the complete remainder data is obtained.
With further reference to FIG. 4, FIG. 4 illustrates an embodiment of receiving and displaying remainder coefficient data, wherein L1 represents line 1, G5 represents group 5, Q-L1 represents row 1 common integer data read from the integer memory, and R-L1-G5 represents received row 1 group 5 remainder coefficient data, and R-L1-G5 remainder coefficient data is received concurrently with the reading of Q-L1 common integer data.
The remainder data is formed by overlapping N groups of remainder coefficient data with equal weight, and the bit width of the remainder data can be reduced to the maximum extent, so that the bit width of the remainder data is as low as 1bit, the bandwidth occupation is further reduced, and the storage space of a driving chip is greatly reduced.
With further reference to fig. 5, fig. 5 illustrates a schematic diagram of common integer data and remainder coefficient generation PWM pulses. Wherein the common integer data is displayed identically in each set of PWM pulse signals, and the remainder data is based on a remainder coefficient RiDetermining to generate equal weight PWM pulse signal when remainder coefficient RiWhen the remainder data is controlled to be displayed, the generated PWM pulse signal and the PWM pulse signal generated by the common integer data are in a high level position together, the common integer data and the remainder data are displayed together, and when the remainder coefficient R isiWhen the control remainder data is not displayed, the generated PWM pulse signal is at a low level position, and the remainder data is not displayed at the moment.
It should be understood that fig. 4 and 5 illustrate one embodiment of the present invention, and that other display modes may be included in the implementation process. If necessary, a remainder memory can be additionally arranged for storing remainder coefficient data, and the remainder coefficient data can be simultaneously received and read and sent to the PWM generating device in cooperation with the common integer data.
In summary, the actual samples of the present invention are prepared according to the description and the drawings, and after a plurality of usage tests, the effect of the usage tests proves that the present invention can achieve the expected purpose, and the practical value is undoubted. The above-mentioned embodiments are only for convenience of illustration and not intended to limit the invention in any way, and those skilled in the art will be able to make equivalents of the features of the invention without departing from the technical scope of the invention.

Claims (9)

1. A method of displaying gradation data, comprising:
1): gray data to be received from outsideThe remainder data of the gray data is divided into N groups, wherein each group of the remainder data is weighted by the same remainder weight WRDifferent coefficient of residue RiComposition is carried out;
2): multiplying the common integer data by the display times M and the remainder coefficient R of each group of remainder dataiMultiplying by the remainder weight WRThe gray data are formed by superposition;
3): transmitting the gray scale data obtained in the step 2) to a PWM generating device to generate a PWM pulse signal for driving a display device to display.
2. The gradation data display method according to claim 1, wherein: each set of remainder data consists of a remainder weight and an nbit remainder coefficient.
3. The gradation data display method according to claim 2, wherein: each set of residue data consists of a residue weight and a 1bit or 2bit residue coefficient.
4. The gradation data display method according to claim 2, wherein: the common integer data is composed of a product of the common integer Q and the number of display times M.
5. The gradation data display method according to claim 2, wherein: remainder weight W of remainder dataRIs any one of 1, 2, 4, 8, and 16.
6. The gradation data display method according to claim 5, wherein: the bit width of the common integer data is at least 3 bits, and the integer memory stores at least 4 rows of integer data.
7. The gradation data display method according to claim 5, wherein: the public integer data and the remainder coefficient data are sent in time segments, and the public integer data and the remainder coefficient data are sent to the PWM generating device when the remainder coefficient data are receivedMiddle combined remainder weight WRTo generate a PWM pulse signal.
8. A gradation data display method according to claim 3, characterized in that: and when the remainder coefficient is 1bit, circularly displaying the common integer data in each group of display periods, and determining whether the remainder data is displayed in each group of display periods according to the numerical value of the remainder coefficient.
9. A gradation data display method according to claim 3, characterized in that: and when the remainder coefficient is greater than or equal to 2 bits, circularly displaying the common integer data in each group of display periods, and determining whether the remainder data is displayed or partially displayed in each group of display periods according to the numerical value of the remainder coefficient.
CN202010356558.9A 2020-04-15 2020-04-29 Gray data display method Withdrawn CN111489690A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202010356558.9A CN111489690A (en) 2020-04-29 2020-04-29 Gray data display method
CN202110387832.3A CN112837652B (en) 2020-04-15 2021-04-09 Gray scale data display driving module and gray scale data transmission method
CN202110384076.9A CN113012635B (en) 2020-04-15 2021-04-09 Gray data transmission controller, transmission control system and transmission method

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CN202010356558.9A CN111489690A (en) 2020-04-29 2020-04-29 Gray data display method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112992054A (en) * 2021-04-19 2021-06-18 成都利普芯微电子有限公司 Gray data display driving module, controller, transmission system and transmission method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112992054A (en) * 2021-04-19 2021-06-18 成都利普芯微电子有限公司 Gray data display driving module, controller, transmission system and transmission method
CN112992054B (en) * 2021-04-19 2023-08-08 成都利普芯微电子有限公司 Gray data display driving module, controller, transmission system and transmission method

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Application publication date: 20200804