CN116704950A - Display method of Mini/Micro LED vehicle-mounted display - Google Patents
Display method of Mini/Micro LED vehicle-mounted display Download PDFInfo
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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]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
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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
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The embodiment of the invention discloses a display method of a Mini/Micro LED vehicle-mounted display, which comprises the following steps: acquiring external illumination intensity received by the panel part through the sensor array; interpolation is carried out on the external illumination intensity received by the part of positions, and a light intensity matrix formed by the external illumination intensity at each pixel unit in the panel is generated; weighting the light intensity matrix and the signal to be displayed to compensate the display screen brightness deficiency caused by external illumination; and controlling each pixel unit to emit light for display according to the weighted signals to be displayed. The embodiment reduces the adverse effect caused by external light reflection and refraction and improves the definition and readability of information on a screen.
Description
Technical Field
The embodiment of the invention relates to the field of vehicle-mounted display, in particular to a display method of a Mini/Micro LED vehicle-mounted display.
Background
In-vehicle displays play an important role in modern vehicles as well as in smart travel, and are considered to be the primary vehicle for information interaction and information transfer between the driver and the vehicle.
Current in-vehicle displays still have some limitations in the application of certain specific scenarios. Such as: when the vehicle-mounted display screen is subjected to strong light direct irradiation, certain reflection and refraction phenomena can be caused, and the acquisition of information on the screen by a driver is influenced. Especially, aiming at key information such as vehicle speed, navigation information, driving state, oil consumption and the like, the phenomenon greatly influences the judgment of a driver on the current situation of the vehicle and the safety of the driver in the driving process of the vehicle.
Disclosure of Invention
The embodiment of the invention provides a display method of a Mini/Micro LED vehicle-mounted display, which reduces adverse effects caused by external light reflection and refraction and improves the definition and readability of information on a screen.
In a first aspect, an embodiment of the present invention provides a display method of a Mini/Micro LED vehicle-mounted display, where the Mini/Micro LED vehicle-mounted display is an LED direct display, and a sensor array is bonded on a display panel;
the method comprises the following steps:
acquiring external illumination intensity received by the panel part through the sensor array;
interpolation is carried out on the external illumination intensity received by the part of positions, and a light intensity matrix formed by the external illumination intensity at each pixel unit in the panel is generated;
weighting the light intensity matrix and the signal to be displayed to compensate the display screen brightness deficiency caused by external illumination;
and controlling each pixel unit to emit light for display according to the weighted signals to be displayed.
In a second aspect, an embodiment of the present invention provides a Mini/Micro LED vehicle-mounted display, where the display is an LED direct display, and the method includes:
a display panel on which a pixel cell array is mounted;
the sensor array is bonded to the panel and used for acquiring external illumination intensity;
a video signal receiving unit for receiving a signal to be displayed of a plurality of clock cycles;
and the data processing module is used for realizing the display method provided by the embodiment.
In a third aspect, the embodiment of the invention also provides an automobile, which is provided with the Mini/Micro LED vehicle-mounted display provided by the embodiment.
According to the embodiment of the invention, a Mini/Micro LED direct display screen is introduced into a vehicle-mounted display, and a display method for reducing adverse effects caused by external light reflection and refraction and improving the definition and readability of information on the screen is provided, and according to the intensity of external light on the screen, independent brightness adjustment is carried out on different pixel units of a display screen panel, so that brightness enhancement of a local area under strong light irradiation can be realized, and visibility and user experience are improved. The method detects the illumination intensity at different positions of the panel in real time by means of the sensor array, and is particularly suitable for continuous change of light illumination conditions, such as direct sunlight, night illumination and the like, in the running process of the vehicle. In consideration of the characteristic that the direct display screen emits light independently by taking pixel units as units, the sensor data are interpolated into the coefficient matrix with the same size as the pixel unit array, so that the coefficient matrix corresponds to the pixel units one by one and is combined with the independent light emitting characteristic of the linear display screen, the accurate light modulation of the pixel units is realized, the visibility and definition of each position are improved accurately and differently, visual discomfort caused by overhigh global brightness is avoided, and energy consumption waste caused by overhigh global brightness is also avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a Mini/Micro LED vehicle-mounted display provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of the position of a sensor array according to an embodiment of the present invention;
FIG. 3 is an overall schematic diagram of each part of a Mini/Micro LED vehicle-mounted display and external illumination according to an embodiment of the present invention;
FIG. 4 is a flow chart of a display method of a Mini/Micro LED vehicle-mounted display provided by the embodiment of the invention;
FIG. 5 is a schematic diagram of the position of another sensor array according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the invention, are within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The embodiment of the invention provides a display method of a Mini/Micro LED vehicle-mounted display. To illustrate the method, a vehicle-mounted display to which the method is applied is preferentially introduced. In the prior art, the liquid crystal display is adopted as the vehicle-mounted display, and compared with the liquid crystal display, the Mini/Micro LED has the advantages of higher brightness, higher contrast ratio, wider color gamut, faster response speed, lower energy consumption, longer service life and higher stability. Therefore, the embodiment of the invention provides a Mini/Micro LED vehicle-mounted display, which is an LED direct display, comprising: a display panel on which a pixel cell array is mounted; the sensor array is bonded to the panel and used for acquiring external illumination intensity; a video signal receiving unit for receiving a signal to be displayed of a plurality of clock cycles; and the data processing module is used for controlling the pixel unit array to emit light for display according to the signals acquired by the sensor array and the signals to be displayed.
Exemplary, fig. 1 is a schematic structural diagram of a Mini/Micro LED vehicle-mounted display according to an embodiment of the present invention. The electric signal obtained by the sensor in fig. 1 is input into the data processing module after being converted into a digital signal through analog-to-digital conversion, the video signal receiving unit comprises an HDMI (High Definition Multimedia Interface ) decoding chip, and the HDMI signal sent by the upper computer is input into the data processing module after being decoded into a plurality of frames of video signals to be displayed; and after the digital signals of the sensor and the signals to be displayed are processed by the data processing module, the pixel unit array of the Mini/Micro LED is controlled to emit light and display by the driving IC.
Further, each sensor in the sensor array may be a MEMS (Microelectro Mechanical System ) sensor, and fig. 2 is a schematic position diagram of a sensor array according to an embodiment of the present invention, as shown in fig. 2, where each MEMS sensor is located between four pixel units of the pixel unit array and is uniformly distributed in a panel range. FIG. 3 is an overall schematic diagram of portions of a Mini/Micro LED vehicle display with external illumination, and in combination with FIGS. 2 and 3, the sensor array may be bonded in any of the following alternative ways:
in the first optional bonding mode, each sensor is bonded in a gap between the pixel units on the front surface of the panel, and is connected with the FPGA control board through wiring in micro-nano processing modes such as exposure, etching and the like. The thickness of the sensor and the thickness of the panel are fully utilized, the thickness is not additionally increased, wiring is direct, and punching of the glass base is not needed.
And in the second optional bonding mode, each sensor is bonded on the back of the panel, and wiring is connected with an FPGA (Field Programmable Gate Array ) control board by adopting a COG (chip on glass) process through micro-nano processing modes such as exposure, etching and the like. Because the panel adopts glass base and is transparent material, light can be irradiated to the back of the panel. This approach also does not add thickness and the sensor is relatively free in size and location, but requires routing by punching or edge routing.
In a third alternative bonding mode, each sensor is transparent and bonded to a transparent film in front of the panel, the transparent film being equally large as the panel and being located between the external light source and the panel. The transparent film is added outside the panel, so that the thickness of the whole display is increased, but the bonding process is simple and easy to control after being independent of the panel.
In practical application, any bonding mode can be selected according to the process requirements and the installation space, and the embodiment is not particularly limited.
Based on the direct display type Mini/Micro LED vehicle-mounted display, fig. 4 is a flow chart of a display method of the Mini/Micro LED vehicle-mounted display provided by the embodiment of the invention. The method is suitable for the condition that the vehicle-mounted display is irradiated by external strong light, and can be executed by a data processing module in the vehicle-mounted display. As shown in fig. 4, the method specifically includes:
s110, acquiring the external illumination intensity received by the position of the panel part through the sensor array.
The sensor may be a light sensor, a temperature sensor or an infrared sensor, as long as the signal output therefrom can be converted into the intensity of external illumination. With reference to fig. 1, the sensor senses that the corresponding position is irradiated by strong light, and causes the electric signal of the corresponding position to change. The signals output by the sensor are analog signals, and in order to facilitate the post-processing of the signals, the analog signals need to be converted into digital signals which can be processed by the FPGA through analog-to-digital conversion.
And S120, interpolating the external illumination intensity received by the part of positions to generate a light intensity matrix formed by the external illumination intensity at each pixel unit in the panel.
The signal of each sensor can only represent the external illumination intensity at the sensor position, and the external illumination intensity of the whole panel cannot be accurately reflected. In the step, the external illumination intensity measured by each sensor is interpolated to obtain the external illumination intensity at each pixel unit in the panel, so as to form a light intensity matrix. The matrix has the same size as the display signal matrix, so that the brightness loss of the display signal under strong light can be conveniently compensated in the subsequent steps.
In a specific embodiment, in consideration of limited space and resource conditions in the vehicle environment, vehicle-mounted DDR (dynamic random Access memory) may be used to implement interpolation operation, as shown in FIG. 1. Firstly, storing the external illumination intensity received by the part of positions acquired by a sensor array in a first matrix in DDR; meanwhile, a second matrix consistent with the number of pixel units is created in DDR for storing the illumination intensity at each pixel unit. Then, according to the sparseness of the sensor array in the panel, selecting a calculation model of the external illumination intensity at the pixel unit; determining a periodic read enable signal of FIFO (first in first out queue) consistent with the number of pixel units according to the calculation model, wherein when the read enable signal is high, the read FIFO of DDR reads out one bit; when the read enable signal is low, the data read out in the previous clock cycle is read. And finally, reading the read FIFO in the first matrix by adopting the read enabling signal, calculating the read data by adopting the calculation model, writing the calculation result into the second matrix at the same clock frequency, and taking the final second matrix as a light intensity matrix.
The specific implementation mode utilizes the DDR rapid read-write attribute, reads and writes the first matrix and the second matrix by adopting the FIFO enabling signals with the same frequency, can complete data processing through chip integration, does not need to add extra processing equipment, and is particularly suitable for scenes with limited space and resources under the vehicle-mounted condition. Alternatively, assuming that m×n sensors and M1×n1 pixel units (M1×n1×3 light emitting chips) (M1 > M, N1> N) are bonded on the panel, two counters are designed in the DDR read/write process, the rows and columns of the coefficient matrix are respectively counted, the column counter is incremented by 1 every readout of one number, and the row counter is incremented by 1 every readout of one row. Interpolation is achieved during reading by controlling the read enable state and simple computation of the read FIFO (first in first out queue) of the DDR (the read rule of the FIFO is that data in each clock cycle FIFO is shifted out by one bit when the read enable is high, and data read out when the enable bit is low is always data read out in the previous clock cycle when the enable is pulled down), a matrix of size m×n is interpolated to size m1×n1.
Further, the sparseness of the sensor array determines the magnitude of the influence of the illumination intensity at each sensor on each pixel unit. According to the difference of sparsity, the reading and writing process comprises the following two optional embodiments:
in a first alternative embodiment, if the ratio of the number of pixel units to the number of sensors per row of the panel is greater than or equal to a set threshold, a first calculation model is selected: the panel is divided into a plurality of areas on average by taking each sensor as the center, and the external illumination intensity acquired by each area sensor is taken as the external illumination intensity at all pixel units of each area. At this time, the periodic read enable signal of the first matrix is determined in the following manner: rounding down the pixel unit to sensor number ratio of each row to M; for each row of pixel units, the first clock period of the periodic read enable signal is set to be high, and the periodic read enable signal is continuously circulated with the high-low potential ratio of 1/(M-1) from the first clock period. Under the reading enabling signal, the signal read in each clock period is the illumination intensity of each pixel unit, and the light intensity matrix is obtained by sequentially writing the signals into the second matrix.
Illustratively, the set threshold is 2 and the number ratio of pixel cells to sensors per row is equal to the set threshold, as shown in fig. 5. At this time, the first clock period of the read enable signal is set to be high for each row of pixels, the data of the first sensor is read and written into the position of the first pixel unit in the second matrix, the read enable signal is set to be low in the following M-1 clock periods, and the data of the first sensor is continuously written into the position of the M-1 pixel units after the first pixel unit in the second matrix. In the (M+1) -th clock period, the reading enabling signal is high again, and the operation is repeated once again with the high-low potential ratio of 1/(M-1), and the operation is repeated in a circulating mode until all the positions of one row of pixel units in the second matrix are written.
In a second alternative embodiment, if the ratio of the number of pixel units per row of the panel to the number of sensors is less than a set threshold, a second calculation model is selected: and averaging the external illumination intensities acquired by two adjacent sensors in the same row, wherein the external illumination intensities are used as the external illumination intensities at the pixel units between the two sensors. Rounding down the pixel unit to sensor number ratio of each row to M; setting the first clock period of a periodic read enabling signal to be high for each row of pixel units, and determining the low potential period number N2-1 after the first clock period according to the pixel unit number N2 before the first sensor; starting a second high-potential period after the end of the (N2-1) low-potential periods, and continuously cycling with the high-low potential ratio of 1/(N-1) from the position of the second high-potential period, wherein N is the number of pixel units between two sensors; and after the last sensor data is read, continuously lasting N3 low potential periods according to the number N3 of pixel units behind the last sensor. Under the reading enabling signal, when the reading enabling signal is high from the second high potential period, averaging the data read when the current and last reading enabling signals are high, and writing the data into the second matrix; and writing the read data into the second matrix in the rest clock period. And writing each element of the second matrix in turn, and finally obtaining the light intensity matrix.
Illustratively, the set threshold is 2, and the number ratio of pixel units to sensors in each row is less than 2, as shown in fig. 2. Setting the first clock period of a read enabling signal to be high for each row of pixels, reading data of a first sensor, writing the data into the position of a first pixel unit in a second matrix, determining the low potential period after the first clock period to be 0 according to the number 1 of the pixel units before the first sensor, starting a second high potential period, continuously cycling (namely continuously keeping high potential) with the high-low potential ratio of 1/0 from the period, averaging the data of a new sensor with the data of the sensor read by the last high potential after each high potential reading, and writing the data into the corresponding position of the second matrix (namely the corresponding position of the pixel unit between the two high potential sensors); and after the data of the last sensor is read, continuing 1 low potential according to the number 1 of pixel units behind the sensor, and writing the data of the last sensor into the position of the last pixel unit to finish writing one row of pixel units in the second matrix.
It should be noted that the greater the number of sensors, the finer the granularity of measurement and regulation of the light intensity. Fig. 2 corresponds to the case where the number of sensors is the largest, and at this time, the set threshold is set to 2, so that the most accurate measurement can be performed on the external light intensity of each pixel unit. The small size and the process requirements of the MEMS sensor can meet the requirements, and the accurate reflection of the light intensity outside each area of the panel is realized.
In addition, when the sensor array is bonded to the front surface of the panel, denser sensor distribution can be realized, and a proper threshold value can be set, so that the number of pixel units and sensors in each row is smaller than or equal to the set threshold value; when the sensor array is bonded on the back and the front of the panel, the distribution of the sensors is relatively sparse under the influence of processes such as punching, wiring and the like, and a proper threshold value can be set, so that the number ratio of pixel units of each row to the sensors is larger than the set threshold value. In practical application, an appropriate calculation model can be selected according to the bonding mode of the sensor, and the embodiment is not particularly limited.
And S130, weighting the light intensity matrix and the signal to be displayed so as to compensate the display screen brightness deficiency caused by external illumination.
The analog-to-digital converted sensor signal cannot directly act on the display screen, and the signal needs to be converted into a coefficient matrix according to the brightness perception capability of human eyes and then weighted to the brightness value of the expected display signal in the previous clock cycle. Optionally, after the operation of S120, the light intensity matrix is consistent with the data matrix of the signal to be displayed, and the light intensity matrix is gamma-expanded to obtain a coefficient matrix conforming to the human eye feeling rule. And carrying out Hadamard product operation on the coefficient matrix and the signal to be displayed in the previous clock period (in order to keep time synchronization) to obtain a weighted signal to be displayed.
In combination with the specific embodiment of fig. 1, in synchronization with S110 and S120, the upper computer outputs video data to be displayed in an HDMI format, converts the video data into VGA video signals through an HDMI decoding chip, delays the VGA video signals in a data synchronization module, and performs timing synchronization with a coefficient matrix to compensate for delay caused by data processing; and finally, weighting the synchronized data through a zone brightness enhancement calculation module so as to enhance the local brightness of the display screen in the strong light irradiation scene.
And S140, controlling each pixel unit to emit light for display according to the weighted signals to be displayed.
With reference to fig. 1, the weighted data is input into a dynamic control module, and the dynamic control module is used for configuring register values required by the driving IC, and simultaneously controlling data reading and writing in cooperation with a data reading and writing control module, so that the IC can work normally in an expected manner. The data signal output at this time is fed into a drive IC, and a PWM (pulse width modulation) signal for controlling the luminance of the display screen is generated by the IC.
In another specific embodiment, the interleaving of S120, S130 and S140 may be performed, the external illumination intensity detected in S120 and the signal to be displayed in S130 may be stored in DDR in real time, the external illumination intensity of each sensor may be read in real time by the read enable signal of the DDR read FIFO, the external light intensity at each pixel unit may be calculated in real time, the external light intensity at each pixel unit may be weighted with the data to be displayed at each pixel unit in real time, and the real-time light emission of each pixel unit may be controlled in real time according to the weighted data. The actual display of the previous pixel unit may be performed simultaneously with the difference, weighting of the pixel units, and the operations of S120, S130 and S140 are not in absolute sequence.
In conventional lcd panels, a backlight module is generally used to provide brightness of the entire screen, which cannot be adjusted independently for different areas. This results in that the brightness of the whole screen is increased under strong light irradiation, but this increases power consumption and visual discomfort. According to the embodiment, the Mini/Micro LED direct display screen is introduced into the vehicle-mounted display, the display method for reducing adverse effects caused by reflection and refraction of external light and improving the definition and readability of information on the screen is provided, and according to the intensity of the external light on the screen, independent brightness adjustment is carried out on different pixel units of the display screen panel, so that brightness enhancement can be carried out on a local area under strong light irradiation, and the visibility and user experience are improved. By means of the MEMS sensor with small size, the method can detect the illumination intensity of different positions of the panel in real time, and is particularly suitable for continuous change of light irradiation conditions in the running process of vehicles, such as direct sunlight, night illumination and the like. In consideration of independent light emission of the direct display screen by taking the pixel units as a unit, the sensor data is interpolated into the coefficient matrix with the same size as the pixel unit array, so that the coefficient matrix corresponds to the pixel units one by one, and the independent light emission characteristic of the linear display screen is combined, so that the accurate light adjustment of the pixel units is realized, the visibility and the definition of each position are improved accurately in a differential mode, visual discomfort caused by overhigh global brightness is avoided, and energy consumption waste caused by overhigh global brightness is also avoided. In addition, the embodiment adopts DDR to realize interpolation of the light intensity matrix, and according to the sparseness degree of the sensor array under different bonding modes, an adaptive calculation model and a read-write enabling signal are provided, matrix interpolation can be rapidly completed through rapid read-write operation and calculation, and the method is particularly suitable for the situation that space and calculation resources are limited under a vehicle-mounted scene.
The embodiment of the invention also provides an automobile provided with the Mini/Micro LED vehicle-mounted display according to any one of the embodiments. The display can be integrated in an instrument panel in a vehicle, and provides clear display effect for a driver under strong light conditions.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the essence of the corresponding technical solutions from the technical solutions of the embodiments of the present invention.
Claims (10)
1. A display method of a Mini/Micro LED vehicle-mounted display is characterized in that the Mini/Micro LED vehicle-mounted display is an LED direct display, and a sensor array is bonded on a display panel;
the method comprises the following steps:
acquiring external illumination intensity received by the panel part through the sensor array;
interpolation is carried out on the external illumination intensity received by the part of positions, and a light intensity matrix formed by the external illumination intensity at each pixel unit in the panel is generated;
weighting the light intensity matrix and the signal to be displayed to compensate the display screen brightness deficiency caused by external illumination;
and controlling each pixel unit to emit light for display according to the weighted signals to be displayed.
2. The method of claim 1, wherein the intensity of external illumination received by the partial locations is stored in a first matrix in the DDR;
the interpolation is performed on the external illumination intensity received by the part of the positions to obtain a light intensity matrix formed by the external illumination intensity at each pixel unit in the panel, and the method comprises the following steps:
creating a second matrix consistent with the number of pixel units in DDR;
selecting a calculation model of external illumination intensity at a pixel unit according to the sparseness of the sensor array in the panel;
determining FIFO periodic reading enabling signals consistent with the number of pixel units according to the calculation model, wherein when the reading enabling signals are high, reading one bit of the DDR reading FIFO; reading the data read out in the previous clock period when the reading enabling signal is low;
and reading the read FIFO of the first matrix by adopting the read enabling signal, calculating the read data by adopting the calculation model, writing the calculation result into the second matrix at the same clock frequency, and taking the final second matrix as a light intensity matrix.
3. The method of claim 2, wherein the sensor array is uniformly distributed in the panel and each sensor is located between four pixel cells;
the method for determining the calculation model of the external illumination intensity at the pixel unit according to the sparseness of the sensor array in the panel comprises the following steps:
if the number ratio of the pixel units to the sensors in each row of the panel is greater than or equal to a set threshold, selecting a first calculation model: dividing the panel into a plurality of areas by taking each sensor as a center, and taking the external illumination intensity acquired by each area sensor as the external illumination intensity of all pixel units of each area;
if the ratio of the number of pixel units to the number of sensors in each row of the panel is smaller than a set threshold value, selecting a second calculation model: and averaging the external illumination intensities acquired by two adjacent sensors in the same row, wherein the external illumination intensities are used as the external illumination intensities at the pixel units between the two sensors.
4. A method according to claim 3, wherein, in case a first calculation model is selected, said determining a periodic read enable signal consistent with the number of pixel cells from said calculation model comprises:
rounding down the pixel unit to sensor number ratio of each row to M;
setting the first clock period of the periodic read enable signal to be high for each row of pixel units, and continuously cycling with the high-low potential ratio of 1/(M-1) from the first clock period;
correspondingly, the reading the data in the first matrix by using the read enabling signal, calculating the read data by using the calculation model, and writing the data into the second matrix at the same clock frequency, including:
and sequentially writing signals read in each clock cycle into the second matrix.
5. A method according to claim 3, wherein in case a second calculation model is chosen, said determining a periodic read enable signal consistent with the number of pixel cells from said calculation model comprises:
setting the first clock period of a periodic read enabling signal to be high for each row of pixel units, and determining the low potential period number after the first clock period according to the number of the pixel units before the first sensor; determining a second high potential period position according to the position of the first sensor, and continuously cycling with a high-low potential ratio of 1/(N-1) from the second high potential period position, wherein N is the number of pixel units between two adjacent sensors; after the data of the last sensor is read, determining the last low potential period number according to the number of pixel units behind the last sensor;
correspondingly, the reading the data in the first matrix by using the read enabling signal, calculating the read data by using the calculation model, and writing the data into the second matrix at the same clock frequency, including:
from the second high potential period, when the reading enabling signal is high, averaging the data read when the current reading enabling signal and the last reading enabling signal are high, and writing the data into the second matrix; and writing the read data into the second matrix in the rest clock period.
6. The method of claim 1, wherein weighting the light intensity matrix with the signal to be displayed to compensate for display screen brightness deficiency caused by external illumination comprises:
performing gamma expansion on the light intensity matrix to obtain a coefficient matrix conforming to the human eye feeling rule;
and carrying out Hadamard product operation on the coefficient matrix and the signal to be displayed in the previous clock period to obtain a weighted signal to be displayed.
7. The Mini/Micro LED vehicle-mounted display is characterized in that the display is an LED direct display, and the display comprises:
a display panel on which a pixel cell array is mounted;
the sensor array is bonded to the panel and used for acquiring external illumination intensity;
a video signal receiving unit for receiving a signal to be displayed of a plurality of clock cycles;
a data processing module for implementing the display method of any one of claims 1-6.
8. The vehicle-mounted display of claim 7, wherein each sensor in the sensor array is a MEMS sensor and is located between four pixel cells of the pixel cell array; the bonding mode adopts any one of the following modes:
each sensor is bonded in a gap between the pixel units on the front surface of the panel and is connected with the FPGA control board through micro-nano processing mode wiring;
each sensor is bonded on the back of the panel and is connected with the FPGA control board by adopting COG process wiring;
each sensor is transparent and is bonded to a transparent film in front of the panel.
9. The vehicle display of claim 8, wherein,
when the sensor array is bonded on the front surface of the panel, the number ratio of the pixel units to the sensors in each row is smaller than or equal to a set threshold value;
when the sensor array is bonded to the back and front of the panel, the pixel cell to sensor count ratio of each row is greater than a set threshold.
10. An automobile, characterized in that the Mini/Micro LED onboard display of any one of claims 7-9 is loaded.
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