CN110648634B - Backlight brightness determining and adjusting method and device, storage medium and electronic equipment - Google Patents
Backlight brightness determining and adjusting method and device, storage medium and electronic equipment Download PDFInfo
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- CN110648634B CN110648634B CN201810672684.8A CN201810672684A CN110648634B CN 110648634 B CN110648634 B CN 110648634B CN 201810672684 A CN201810672684 A CN 201810672684A CN 110648634 B CN110648634 B CN 110648634B
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/3406—Control of illumination source
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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
- G09G3/34—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 by control of light from an independent source
- G09G3/36—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 by control of light from an independent source using liquid crystals
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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
- G09G2320/06—Adjustment of display parameters
- G09G2320/0613—The adjustment depending on the type of the information to be displayed
- G09G2320/062—Adjustment of illumination source parameters
Abstract
The invention discloses a backlight brightness determining and adjusting method and device, a storage medium and electronic equipment, which are applied to a medical display and relate to the technical field of display. The backlight brightness determination method comprises the following steps: acquiring a cycle and a plurality of integration time periods of a dimming signal for adjusting a backlight brightness signal; wherein the integration period does not exceed a period of the dimming signal at maximum; determining a plurality of integration starting points with the same phase on the dimming signal; sequentially integrating the backlight brightness signal for multiple times according to the multiple integration starting points and the multiple integration time periods, and determining the result of the multiple times of integration as multiple candidate brightness; determining a maximum brightness among the plurality of candidate brightnesses as a backlight brightness. The backlight brightness can be accurately determined.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a backlight brightness determination method for a medical display, a backlight brightness determination apparatus for a medical display, a backlight brightness adjustment method for a medical display, a backlight brightness adjustment apparatus for a medical display, a storage medium, and an electronic device.
Background
With the development of display technology and the increasingly demanding social demands, the precise and stable backlight brightness of the lcd has become a basic requirement for display, and especially in the medical display scene, it is necessary to ensure the precise display of medical-grade images.
On one hand, the backlight of the display can age with long-term use, resulting in the brightness of the display also fading with time; on the other hand, the backlight of the display is also affected by the change of the ambient temperature inside the display, resulting in the unstable brightness. In this case, the reading of the sensor for sensing the backlight brightness is also reduced synchronously, and the reading of the sensor can be adjusted to the factory setting value by pulling up the backlight.
However, when the luminance data is acquired by the sensor, due to the existence of the dimming frequency of the dimming signal PWM (Pulse Width Modulation), when the frequency is low, the influence on the luminance data acquired by the sensor is large, so that the data acquired by the sensor is unstable, and finally the backlight luminance adjustment also fluctuates.
At present, in order to obtain stable backlight brightness, a PWM frequency synchronization signal may be obtained through an external circuit, so that PWM phases corresponding to each reading time point are as consistent as possible.
It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.
Disclosure of Invention
An object of the present disclosure is to provide a backlight brightness determining method for a medical display, a backlight brightness determining apparatus for a medical display, a backlight brightness adjusting method for a medical display, a backlight brightness adjusting apparatus for a medical display, a storage medium, and an electronic device, thereby overcoming, at least to some extent, the problem of inaccurate backlight brightness obtained by a light sensor due to limitations and disadvantages of the related art.
According to an aspect of the present disclosure, there is provided a backlight brightness determination method of a medical display, including: acquiring a cycle and a plurality of integration time periods of a dimming signal for adjusting a backlight brightness signal; wherein the integration period does not exceed a period of the dimming signal at maximum; determining a plurality of integration starting points with the same phase on the dimming signal; sequentially integrating the backlight brightness signal for multiple times according to the multiple integration starting points and the multiple integration time periods, and determining the result of the multiple times of integration as multiple candidate brightness; determining a maximum brightness among the plurality of candidate brightnesses as a backlight brightness.
Optionally, the integration time periods corresponding to the integration starting points are sequentially increased.
Optionally, the integration time periods corresponding to the integration starting points are sequentially decreased.
Optionally, the integration time period is an integer multiple of a unit integration time t.
Optionally, the maximum integration period n × t is less than or equal to the period of the dimming signal; wherein, (n +1) × t is greater than the period of the dimming signal, and n is a positive integer.
Optionally, the time intervals between each adjacent two integration start points of the plurality of integration start points are equal.
According to an aspect of the present disclosure, a backlight brightness determination apparatus of a medical display may include an information acquisition module, an integration start point determination module, a candidate brightness determination module, and a backlight brightness determination module.
Specifically, the information obtaining module may be configured to obtain a period of a dimming signal used for adjusting the backlight luminance signal and a plurality of integration periods configured based on the period of the dimming signal; wherein the integration period does not exceed a period of the dimming signal at maximum; the integration starting point determining module may be configured to determine a plurality of integration starting points with the same phase on the dimming signal; the candidate brightness determining module may be configured to sequentially perform multiple integrations on the backlight brightness signal according to the multiple integration starting points and the multiple integration time periods, and determine a result of the multiple integrations as multiple candidate brightnesses; the backlight brightness determination module may be configured to determine a maximum brightness of the plurality of candidate brightnesses as the backlight brightness.
Optionally, the integration time periods corresponding to the integration starting points are sequentially increased.
Optionally, the integration time periods corresponding to the integration starting points are sequentially decreased.
Optionally, the integration time period is an integer multiple of a unit integration time t.
Optionally, the maximum integration period n × t is less than or equal to the period of the dimming signal; wherein, (n +1) × t is greater than the period of the dimming signal, and n is a positive integer.
Optionally, the time intervals between each adjacent two integration start points of the plurality of integration start points are equal.
According to an aspect of the present disclosure, there is provided a backlight brightness adjusting method of a medical display, including: determining the backlight brightness of the medical display by the backlight brightness determination method; comparing the backlight brightness with a preset brightness; and if the backlight brightness is not consistent with the preset brightness, adjusting the backlight brightness.
Optionally, the backlight brightness adjusting method further includes: after the backlight brightness is adjusted, the current backlight brightness is determined by the backlight brightness determination method; and if the current backlight brightness is consistent with the preset brightness, determining that the process of adjusting the backlight brightness is finished.
According to one aspect of the present disclosure, a backlight brightness adjusting apparatus of a medical display is provided, which may include a brightness determining module, a brightness comparing module, and a brightness adjusting module.
Specifically, the brightness determining module may be configured to determine the backlight brightness of the medical display by the backlight brightness determining method; the brightness comparison module can be used for comparing the backlight brightness with a preset brightness; the brightness adjusting module may be configured to adjust the backlight brightness if the backlight brightness is inconsistent with the preset brightness.
Optionally, the backlight brightness adjusting device may further include a brightness re-determination module.
Specifically, the brightness re-determination module may be configured to determine the current backlight brightness by the backlight brightness determination method after the backlight brightness is adjusted; and if the current backlight brightness is consistent with the preset brightness, determining that the process of adjusting the backlight brightness is finished.
According to an aspect of the present disclosure, there is provided a light sensor including the backlight luminance determining apparatus of any one of the above.
According to an aspect of the present disclosure, there is provided a backlight brightness adjusting system including the above-mentioned light sensor.
According to an aspect of the present disclosure, there is provided a storage medium having stored thereon a computer program which, when executed by a processor, implements the backlight brightness determination method of any one of the above.
According to an aspect of the present disclosure, there is provided an electronic device including: a processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to perform any one of the above-described backlight brightness determination methods via execution of the executable instructions.
In the technical solutions provided by some embodiments of the present disclosure, a cycle of a dimming signal and a plurality of integration time periods that do not exceed the cycle at maximum are obtained, a plurality of integration starting points with the same phase on the dimming signal are determined, a backlight luminance signal is integrated for a plurality of times according to the integration starting points and the integration time periods, and the maximum integration result is determined as the backlight luminance, on one hand, the present disclosure can accurately determine the backlight luminance, specifically determine the backlight luminance by taking the maximum integration value, rather than the existing average value manner, so that the determined luminance is closer to the actual luminance; on the other hand, the present disclosure does not increase hardware design cost, and does not require the signal synchronization process of the prior art, and is less likely to have errors due to synchronization.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty. In the drawings:
fig. 1 schematically shows a waveform of a dimming signal in an ideal state;
FIG. 2 schematically illustrates sensor readings corresponding to particular points in the waveform of FIG. 1;
fig. 3 schematically illustrates a flow chart of a backlight brightness determination method according to an exemplary embodiment of the present disclosure;
fig. 4 shows a schematic diagram of a correspondence of integration start points and integration time periods on a dimming signal according to an exemplary embodiment of the present disclosure;
fig. 5 shows a schematic diagram of a correspondence of integration start points and integration time periods on a dimming signal according to another exemplary embodiment of the present disclosure;
fig. 6 schematically shows a block diagram of a backlight brightness determination apparatus according to an exemplary embodiment of the present disclosure;
fig. 7 schematically illustrates a flowchart of a backlight brightness adjustment method according to an exemplary embodiment of the present disclosure;
fig. 8 schematically illustrates a block diagram of a backlight brightness adjusting apparatus according to an exemplary embodiment of the present disclosure;
fig. 9 schematically illustrates a block diagram of a backlight brightness adjusting apparatus according to another exemplary embodiment of the present disclosure;
FIG. 10 shows a schematic diagram of a storage medium according to an example embodiment of the present disclosure; and
fig. 11 schematically shows a block diagram of an electronic device according to an exemplary embodiment of the present disclosure.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.
The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the steps. For example, some steps may be decomposed, and some steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
Most medical displays collect the backlight brightness of the liquid crystal display through the optical sensor, and can perform brightness compensation by adjusting the duty ratio of the dimming signal PWM of the backlight source, so that the brightness stability is realized. The luminance sampling integration time of the light sensor is fixed, but when the display system issues a command to the light sensor and reads luminance data, due to the allocation of system resources, each time the command is issued and the light sensor reads the luminance data has a certain delay, and the delay is slightly different due to different system resource occupation conditions. It is easy to understand that although the sampling and integration time of the two times of brightness of the light sensor is the same, the on and off time of the backlight covered in the sampling and integration process is different, so that there is a difference in the reading of the two times of brightness data, and when the difference is large, the system may misunderstand that the brightness of the backlight has changed, so as to erroneously adjust the duty ratio of the dimming signal PWM of the backlight, and cause the brightness to become unstable.
In addition, for example, when the period of the PWM is 6ms and the integration time of the photosensor is about 3ms, the time for the photosensor to acquire data is on the order of magnitude of the PWM period, so that the acquired data is inaccurate due to its own operating characteristics without replacing the sensor.
Currently, some techniques determine the actual brightness by averaging the readings of the light sensor, which is a relatively large error. In addition, a signal synchronization mode is adopted, specifically, a PWM frequency synchronization signal is obtained through an external circuit, so that PWM phases corresponding to each time point of reading are consistent as much as possible, however, the signal synchronization also causes a problem of a large error.
Fig. 1 schematically shows a waveform of a dimming signal in an ideal state. The points read by the photosensors are random, such as illustrated at t0, t1, and t 2. Described herein is an ideal case where, as described above, when the dimming signal and the time for the light sensor to read data are on the order of magnitude, the result as shown in fig. 1 may not be read.
In addition, even when synchronization is performed, the acquisition time of the circuit cannot be exactly as specified at a specified position (e.g., a rising edge or a falling edge) due to the presence of a reception response time. The process of measuring data by the light sensor is an integration process, that is, measuring at a certain time and integrating for a certain time to obtain a value at the time. The light sensor determines that the brightness may be different at three times of t0, t1 and t2 as shown in fig. 1, and specifically, the determined brightness integration result may be shown in fig. 2, for example.
In view of the above-mentioned deficiencies of the prior art, the present disclosure provides a backlight brightness determination method.
Fig. 3 schematically shows a flow chart of a backlight brightness determination method of a medical display of an exemplary embodiment of the present disclosure. Referring to fig. 3, the backlight luminance determining method of the present disclosure may include the steps of:
s32, acquiring a period and a plurality of integration time periods of a dimming signal for adjusting the backlight brightness signal; wherein the integration period does not exceed a period of the dimming signal at maximum.
The dimming signal described in this disclosure is a PWM signal, and the period and the duty ratio thereof may be directly related to the liquid crystal panel, that is, when the liquid crystal panel is determined, the backlight dimming signal PWM corresponding to the liquid crystal panel is also determined. In addition, in order to meet the actual lighting requirement, a debugging person can adjust the period and the duty ratio of the PWM signal by himself. It is easily understood that the PWM signal is used as a signal for adjusting the backlight brightness, and once the PWM signal is set, the period of the backlight brightness signal is the same as that of the PWM signal.
The integration time period described in this disclosure may mean an integration time period, that is, the above-mentioned luminance sampling integration time, and the integration result of the backlight luminance signal in the integration time period is the backlight luminance representing the corresponding time point.
Specifically, the integration period may be determined based on a period of the dimming signal, and the plurality of integration periods may not exceed the period of the dimming signal at maximum. Taking the cycle of the dimming signal as 6ms as an example, the plurality of integration periods may be configured to be 100 μ s, 200 μ s, 500 μ s, 1ms, 1.5ms, 3ms, 5.8ms, or the like. The integration time period may be randomly determined, that is, a plurality of times may be selected from less than 6ms by using an existing random algorithm as the integration time period, and the number and specific values of the integration time period are not particularly limited in the present disclosure.
According to some embodiments of the present disclosure, the present disclosure may determine the plurality of integration periods as described above in a predetermined rule. Specifically, the integration time period may be an integral multiple of a unit integration time T, where the unit integration time T may be determined based on a period T of the dimming signal, and a maximum integration time period n × T is less than or equal to the period of the dimming signal, where (n +1) × T is greater than the period of the dimming signal, and n is a positive integer.
For example, when the period T of the dimming signal is in the order of 6ms, the unit integration time T may be set to 100 μ s, and at this time, since the integration time period does not exceed the period T of the dimming signal at maximum, 60 integration time periods may be determined, which are 100 μ s, 200 μ s, 300 μ s, …, 5.9ms, and 6ms, respectively.
It is to be understood that the above determination of the unit integration time t is only exemplary, and the scheme of determining the unit integration time according to the period of the dimming signal should belong to the concept of the present invention.
And S34, determining a plurality of integration starting points with the same phase on the dimming signal.
In an exemplary embodiment of the present disclosure, first, a reference phase may be determined on the dimming signal, and the reference phase may be randomly determined, that is, the reference phase may be any phase including a rising edge or a falling edge on the dimming signal.
Next, a plurality of integration start points on the dimming signal having the same phase as the reference phase may be determined. Specifically, the integration start points may be determined by temporally shifting an integral multiple Δ T of the dimming signal period T based on the reference phase. Here, Δ T may represent a fixed time interval, that is, the determined time intervals between adjacent integration start points are equal, and may be, for example, three times the period T of the dimming signal. In addition, Δ T may also be a variable value, that is, the determined time intervals between adjacent integration start points may not be equal, for example, the time interval between the first integration start point and the second integration start point is the dimming signal period T, the time interval between the second integration start point and the third integration start point is twice the dimming signal period T, the time interval between the third integration start point and the fourth integration start point is five times the dimming signal period T, and so on.
It is easily understood that the number of integration start points determined in step S34 of the present disclosure is the same as the number of integration time periods determined in step S32, so that integration calculation can be performed based on the integration start points and the corresponding integration time periods.
S36, sequentially and respectively carrying out multiple times of integration on the backlight brightness signal according to the multiple integration starting points and the multiple integration time periods, and determining the multiple times of integration results as multiple candidate brightness.
After the integration starting point and the integration time period are determined, the backlight brightness signal detected by the light sensor can be sequentially integrated for multiple times according to the integration starting point and the integration time period, and each integration result corresponds to one candidate brightness.
According to some embodiments of the present disclosure, the number of integration start points and integration periods is the same, and the integration start points may be randomly corresponding to the integration periods. Specifically, the first integration start point may correspond to any one of the n integration periods, and a result calculated based on this integration may be used as the first candidate luminance; the second integration start point may correspond to any one of the remaining n-1 integration periods, and a result calculated based on this integration may be a second candidate luminance; etc., whereby n candidate luminances can be determined.
According to some further embodiments, the integration time periods corresponding to the integration start points may be sequentially incremented. That is, the integration time period corresponding to each integration start point gradually increases in chronological order. For example, the first integration start point corresponds to an integration period of 100 μ s, the second integration start point corresponds to an integration period of 300 μ s, the third integration start point corresponds to an integration period of 1ms, and so on. In addition, taking the period T of the dimming signal as 6ms as an example, the integration period corresponding to the nth integration start point may be 6ms or some predetermined time (e.g., 5.9ms) approaching 6ms in an incremental manner.
Referring to fig. 4, in an embodiment in which the integration periods of the present disclosure are configured as integer multiples of the unit integration time T, the above reference phase corresponds to Ts in fig. 4, and each integration start point is the same as the phase of Ts, corresponding to T01, T02, T03, and the like in fig. 4. The integration time period corresponding to the first integration starting point T01 is the unit integration time T, and at this time, the integration ending point corresponding to the first integration starting point T01 can be denoted as T1, and then T1 is denoted as T01+ T, and it can be seen that the corresponding first candidate luminance can be calculated based on T01 and T. Similarly, a second candidate luminance and a third candidate luminance may be calculated, respectively. It is easily understood that fig. 4 is only an exemplary description, and n candidate luminances may be actually calculated, where n × T is equal to or less than the period T of the dimming signal, and (n +1) × T is greater than the period T of the dimming signal.
According to some other embodiments, the integration time periods corresponding to the integration start points may be sequentially decreased. That is, the integration time period corresponding to each integration start point gradually decreases in chronological order. For example, the integration period corresponding to the first integration start point is 1ms, the integration period corresponding to the second integration start point is 0.8ms, the integration period corresponding to the third integration start point is 0.7ms, and so on. In addition, taking the period T of the dimming signal as 6ms as an example, the integration period corresponding to the first integration start point may be 6ms or some predetermined time (e.g., 5.9ms) approaching 6ms in an incremental manner.
Referring to fig. 5, in an embodiment in which the integration periods are configured as integer multiples of the unit integration time T of the present disclosure, the reference phase corresponds to Ts in fig. 5, and each integration start point is the same as the phase of Ts, corresponding to T01, T02, T03, and the like in fig. 5. The integration time period corresponding to the first integration starting point T01 is the unit integration time T, and at this time, the integration ending point corresponding to the first integration starting point T01 may be denoted as T1, and then T1 is denoted as T01+ n × T, and the corresponding first candidate luminance may be calculated. Similarly, a second candidate luminance and a third candidate luminance may be calculated, respectively. It is easily understood that fig. 5 is only an exemplary description, and n candidate luminances may be actually calculated, where n × T is equal to or less than the period T of the dimming signal, and (n +1) × T is greater than the period T of the dimming signal.
And S38, determining the maximum brightness in the candidate brightness as the backlight brightness.
In the exemplary embodiment of the present disclosure, a plurality of candidate luminances may be determined by the integral calculation in step S36, and a candidate luminance having the largest luminance among the determined plurality of candidate luminances may be output as the backlight luminance in step S38. That is, the backlight luminance actually output by the light sensor is the maximum value among the plurality of candidate luminances.
In addition, the present disclosure may further include a process in which the dimming system adjusts the backlight by the backlight brightness output by the light sensor. For example, when the backlight brightness output by the light sensor is greater than the brightness required by the system, the backlight brightness can be reduced by means of PWM chopping and controlling the on-time of the light-emitting circuit; when the backlight brightness output by the light sensor is less than the brightness required by the system, the brightness can be improved by increasing the backlight power.
The backlight luminance determining method of the present disclosure will be explained below by way of an example.
For example, the period T of the dimming signal PWM is 6ms, and the unit integration time T may be set to 80 μ s, where T80 μ s may be the unit integration time suitable for the PWM signal determined by the commissioning person according to the test result. First, the number n of candidate luminances, i.e. the value of T divided by T and rounded down, can be determined, in which case n is 75.
Next, 75 integration start points with the same phase may be taken on the dimming signal, and the time intervals between two adjacent ones of the integration start points may be the same. Specifically, when the backlight luminance signal arrives, a phase (reference phase) may be randomly determined on a first cycle of the backlight luminance signal, and integrated with 80 μ s as an integration period thereafter to obtain a 1 st candidate luminance; taking a time point with the same phase as the reference phase in the second period as a second integration starting point, and performing integration by taking the subsequent 2 x 80 mus as an integration time period to obtain a second candidate brightness; taking a time point with the same phase as the reference phase in the third period as a third integration starting point, and performing integration by taking the subsequent 3 x 80 mus as an integration time period to obtain a third candidate brightness; and so on until a total of 75 candidate luminances are obtained.
Then, the maximum value of the 75 candidate luminances can be taken as the backlight luminance output by the light sensor.
In summary, the backlight brightness determining method of the present disclosure can determine the backlight brightness accurately in real time without a signal synchronization process. In addition, the present disclosure does not increase hardware design costs.
It should be noted that although the various steps of the methods of the present disclosure are depicted in the drawings in a particular order, this does not require or imply that these steps must be performed in this particular order, or that all of the depicted steps must be performed, to achieve desirable results. Additionally or alternatively, certain steps may be omitted, multiple steps combined into one step execution, and/or one step broken down into multiple step executions, etc.
Further, the present exemplary embodiment also provides a backlight brightness determination apparatus for a medical display.
Fig. 6 schematically illustrates a block diagram of a backlight brightness determination apparatus according to an exemplary embodiment of the present disclosure. Referring to fig. 6, the backlight luminance determining apparatus 6 according to an exemplary embodiment of the present disclosure may include an information obtaining module 61, an integration start point determining module 63, a candidate luminance determining module 65, and a backlight luminance determining module 67.
Specifically, the information obtaining module 61 may be configured to obtain a period of a dimming signal used for adjusting the backlight luminance signal and a plurality of integration periods configured based on the period of the dimming signal; wherein the integration period does not exceed a period of the dimming signal at maximum; the integration starting point determining module 63 may be configured to determine a plurality of integration starting points with the same phase on the dimming signal; the candidate luminance determining module 65 may be configured to sequentially integrate the backlight luminance signal for multiple times according to the multiple integration starting points and the multiple integration time periods, and determine a result of the multiple integration as multiple candidate luminances; backlight brightness determination module 67 may be configured to determine a maximum brightness of the plurality of candidate brightnesses as a backlight brightness.
According to the exemplary embodiment of the present disclosure, the integration time periods corresponding to the integration start points are sequentially increased.
According to the exemplary embodiment of the present disclosure, the integration time periods corresponding to the integration start points are sequentially decreased.
According to an exemplary embodiment of the present disclosure, the integration time period is an integer multiple of a unit integration time t.
According to an exemplary embodiment of the present disclosure, the maximum integration period n × t is less than or equal to the period of the dimming signal; wherein, (n +1) × t is greater than the period of the dimming signal, and n is a positive integer.
According to an exemplary embodiment of the present disclosure, a time interval between each adjacent two integration start points among the plurality of integration start points is equal.
By the backlight brightness determining device, the backlight brightness can be determined accurately in real time, and a signal synchronization process is not needed. In addition, the present disclosure does not increase hardware design costs.
Since each functional module of the program operation performance analysis apparatus according to the embodiment of the present invention is the same as that in the embodiment of the present invention, it is not described herein again.
Further, the present exemplary embodiment also provides a light sensor, and the light sensor may include the backlight brightness determination device.
Further, the present exemplary embodiment also provides a backlight brightness adjusting system, which may include the above-mentioned light sensor.
The backlight brightness adjusting system can realize accurate display of the brightness of the display, and has wide application prospect in medical treatment, military use or other systems needing to ensure stable and accurate display.
Further, the present exemplary embodiment also provides a backlight brightness adjusting method for a medical display. Referring to fig. 7, the backlight brightness adjusting method of the exemplary embodiment of the present disclosure may include the steps of:
and S72, determining the backlight brightness of the medical display.
Specifically, the backlight brightness may be determined by using the backlight brightness determination method, and the specific process is described in detail above and is not described herein again.
S74, comparing the backlight brightness with a preset brightness.
In an exemplary embodiment of the present disclosure, the preset brightness may be configured by a debugger according to an actual application scenario, and the present disclosure does not specifically limit a specific value of the preset brightness.
And S76, if the backlight brightness is not consistent with the preset brightness, adjusting the backlight brightness.
In an exemplary embodiment of the present disclosure, an error range may be configured for the preset luminance, and if the backlight luminance is within the error range of the preset luminance, it may be determined that the backlight luminance is consistent with the preset luminance.
In addition, if the backlight luminance is outside the error range of the preset luminance, it may be determined that the backlight luminance is not identical to the preset luminance, in which case the backlight luminance may be adjusted. For example, when the backlight brightness is greater than the preset brightness, the backlight brightness can be reduced by means of PWM chopping and controlling the on-time of the light-emitting circuit; when the backlight brightness is less than the preset brightness, the brightness can be improved by increasing the backlight power.
According to some embodiments of the present disclosure, the backlight brightness adjusting method of the exemplary embodiment of the present disclosure may further include: after the backlight brightness is adjusted, the backlight brightness may be determined again as the current backlight brightness by the above-described backlight brightness determination method. In this case, if the current backlight brightness is consistent with the preset brightness, it may be determined that the process of adjusting the backlight brightness is finished; if the current backlight brightness is inconsistent with the preset brightness, the backlight brightness can be adjusted again, or an alarm message is sent out to prompt a debugging person that the display may have problems.
Further, the present exemplary embodiment also provides a backlight brightness adjusting device of a medical display. Referring to fig. 8, the backlight luminance adjusting apparatus 8 of the exemplary embodiment of the present disclosure may include a luminance determining module 81, a luminance comparing module 83, and a luminance adjusting module 85.
Specifically, the brightness determining module 81 may be configured to determine the backlight brightness of the medical display by the backlight brightness determining method; the brightness comparison module 83 may be configured to compare the backlight brightness with a preset brightness; the brightness adjusting module 85 may be configured to adjust the backlight brightness if the backlight brightness is not consistent with the preset brightness.
According to an exemplary embodiment of the present disclosure, referring to fig. 9, the backlight luminance adjusting apparatus 9 may further include a luminance re-determination module 91 in addition to the luminance determination module 81, the luminance comparison module 83, and the luminance adjustment module 85.
Specifically, the brightness re-determination module 91 may be configured to determine the current backlight brightness by the backlight brightness determination method after the backlight brightness is adjusted; and if the current backlight brightness is consistent with the preset brightness, determining that the process of adjusting the backlight brightness is finished.
The detailed description of the backlight brightness adjusting device is already described in the backlight brightness adjusting method, and is not repeated herein. In addition, the backlight brightness adjusting method and device of the medical display can accurately adjust the backlight brightness so as to meet the requirement of an actual lighting scene.
In an exemplary embodiment of the present disclosure, there is also provided a computer-readable storage medium having stored thereon a program product capable of implementing the above-described method of the present specification. In some possible embodiments, aspects of the invention may also be implemented in the form of a program product comprising program code means for causing a terminal device to carry out the steps according to various exemplary embodiments of the invention described in the above section "exemplary methods" of the present description, when said program product is run on the terminal device.
Referring to fig. 10, a program product 1000 for implementing the above method according to an embodiment of the present invention is described, which may employ a portable compact disc read only memory (CD-ROM) and include program code, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.
Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).
In an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided.
As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.
An electronic device 1100 according to this embodiment of the invention is described below with reference to fig. 11. The electronic device 1100 shown in fig. 11 is only an example and should not bring any limitations to the function and the scope of use of the embodiments of the present invention.
As shown in fig. 11, electronic device 1100 is embodied in the form of a general purpose computing device. The components of the electronic device 1100 may include, but are not limited to: the at least one processing unit 1110, the at least one memory unit 1120, a bus 1130 connecting different system components (including the memory unit 1120 and the processing unit 1110), and a display unit 1140.
Wherein the storage unit stores program code that is executable by the processing unit 1110 to cause the processing unit 1110 to perform steps according to various exemplary embodiments of the present invention as described in the above section "exemplary methods" of the present specification. For example, the processing unit 1110 may perform steps S32 to S38 as shown in fig. 3 or steps S72 to S76 as shown in fig. 7.
The storage unit 1120 may include a readable medium in the form of a volatile memory unit, such as a random access memory unit (RAM)11201 and/or a cache memory unit 11202, and may further include a read only memory unit (ROM) 11203.
The electronic device 1100 may also communicate with one or more external devices 1200 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 1100, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 1100 to communicate with one or more other computing devices. Such communication may occur via an input/output (I/O) interface 1150. Also, the electronic device 1100 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the internet) via the network adapter 1160. As shown, the network adapter 1160 communicates with the other modules of the electronic device 1100 over the bus 1130. It should be appreciated that although not shown, other hardware and/or software modules may be used in conjunction with the electronic device 1100, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.
Furthermore, the above-described figures are merely schematic illustrations of processes involved in methods according to exemplary embodiments of the invention, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is to be limited only by the terms of the appended claims.
Claims (12)
1. A method for backlight brightness determination for a medical display, comprising:
acquiring a cycle and a plurality of integration time periods of a dimming signal for adjusting a backlight brightness signal; wherein the integration period does not exceed a period of the dimming signal at maximum;
determining a reference phase on the dimming signal, and based on the reference phase, shifting an integral multiple of the period of the dimming signal in time to determine a plurality of integration starting points with the same phase on the dimming signal;
sequentially integrating the backlight brightness signal for multiple times according to the multiple integration starting points and the multiple integration time periods, and determining the result of the multiple times of integration as multiple candidate brightness;
determining a maximum brightness among the plurality of candidate brightnesses as a backlight brightness.
2. The backlight luminance determining method according to claim 1, wherein the integration time periods corresponding to the integration start points are sequentially incremented.
3. The backlight luminance determining method according to claim 1, wherein the integration time periods corresponding to the integration start points are sequentially decreased.
4. The backlight luminance determination method according to any one of claims 1 to 3, wherein the integration period is an integral multiple of a unit integration time t.
5. The backlight brightness determination method according to claim 4, wherein the maximum integration period n x t is less than or equal to the period of the dimming signal;
wherein, (n +1) × t is greater than the period of the dimming signal, and n is a positive integer.
6. The backlight luminance determination method according to any one of claims 1 to 3, wherein a time interval between each adjacent two of the plurality of integration start points is equal.
7. A backlight brightness determination apparatus for a medical display, comprising:
the backlight brightness control device comprises an information acquisition module, a control module and a display module, wherein the information acquisition module is used for acquiring the period of a dimming signal for adjusting a backlight brightness signal and a plurality of integration time periods configured based on the period of the dimming signal; wherein the integration period does not exceed a period of the dimming signal at maximum;
the integral starting point determining module is used for determining a reference phase on the dimming signal and shifting integral multiples of the period of the dimming signal in time based on the reference phase so as to determine a plurality of integral starting points with the same phase on the dimming signal;
the candidate brightness determining module is used for sequentially performing multiple times of integration on the backlight brightness signal according to the multiple integration starting points and the multiple integration time periods, and determining the multiple times of integration results as multiple candidate brightness;
and the backlight brightness determining module is used for determining the maximum brightness in the candidate brightness as the backlight brightness.
8. A backlight brightness adjusting method of a medical display is characterized by comprising the following steps:
determining a backlight brightness of a medical display by the backlight brightness determination method of any one of claims 1 to 6;
comparing the backlight brightness with a preset brightness;
and if the backlight brightness is not consistent with the preset brightness, adjusting the backlight brightness.
9. The backlight luminance adjusting method according to claim 8, further comprising:
determining a current backlight brightness by the backlight brightness determination method of any one of claims 1 to 6 after adjusting the backlight brightness;
and if the current backlight brightness is consistent with the preset brightness, determining that the process of adjusting the backlight brightness is finished.
10. A backlight brightness adjustment apparatus for a medical display, comprising:
a brightness determination module for determining a backlight brightness of a medical display by the backlight brightness determination method of any one of claims 1 to 6;
the brightness comparison module is used for comparing the backlight brightness with a preset brightness;
and the brightness adjusting module is used for adjusting the backlight brightness if the backlight brightness is not consistent with the preset brightness.
11. A storage medium having stored thereon a computer program, wherein the computer program, when executed by a processor, implements the backlight brightness determination method of any one of claims 1 to 6 or the backlight brightness adjustment method of claim 8 or 9.
12. An electronic device, comprising:
a processor; and
a memory for storing executable instructions of the processor;
wherein the processor is configured to perform the backlight brightness determination method of any one of claims 1 to 6 or the backlight brightness adjustment method of claim 8 or 9 via execution of the executable instructions.
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| TWI721808B (en) * | 2020-03-04 | 2021-03-11 | 和碩聯合科技股份有限公司 | Luminance compensation method |
| CN111638756B (en) * | 2020-05-29 | 2022-03-22 | Oppo广东移动通信有限公司 | Control method, control device, electronic terminal, and computer-readable storage medium |
| CN114333708A (en) * | 2021-11-30 | 2022-04-12 | 北京德为智慧科技有限公司 | Display brightness obtaining method, automatic adjusting method and related equipment |
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| CN100592837C (en) * | 2002-03-01 | 2010-02-24 | 夏普株式会社 | Light emitting device and display unit using the light emitting device and reading device |
| US7176878B2 (en) * | 2002-12-11 | 2007-02-13 | Nvidia Corporation | Backlight dimming and LCD amplitude boost |
| CN101197115A (en) * | 2006-12-07 | 2008-06-11 | 鸿富锦精密工业（深圳）有限公司 | Automatic brightness regulation circuit of display equipment |
| CN101388183B (en) * | 2007-09-10 | 2011-01-05 | 北京京东方光电科技有限公司 | LCD device high dynamic contrast processing equipment and method |
| KR101301770B1 (en) * | 2008-01-23 | 2013-09-02 | 엘지디스플레이 주식회사 | Liquid Crystal Display and Dimming Controlling Method thereof |
| KR101789681B1 (en) * | 2010-09-10 | 2017-10-25 | 삼성전자주식회사 | Luminescence driving apparatus, display apparatus and driving method thereof |
| KR101706578B1 (en) * | 2010-10-08 | 2017-02-16 | 엘지디스플레이 주식회사 | backlight unit and liquid crystal display module including the same |
| JP5687880B2 (en) * | 2010-11-08 | 2015-03-25 | 船井電機株式会社 | Image display device |
| CN102543001A (en) * | 2011-12-15 | 2012-07-04 | 无锡中星微电子有限公司 | Backlight source brightness regulation method, system and device |
| CN105575341A (en) * | 2016-03-15 | 2016-05-11 | 武汉华星光电技术有限公司 | Liquid crystal display device and backlight control method thereof |
| CN106060285A (en) * | 2016-08-15 | 2016-10-26 | 广东欧珀移动通信有限公司 | Backlight control method and device, and mobile terminal |
| CN106782361A (en) * | 2016-12-08 | 2017-05-31 | 青岛海信电器股份有限公司 | The method and device of backlight control signal is generated in liquid crystal display device |
| CN106686811B (en) * | 2016-12-23 | 2018-11-09 | 深圳市思乐数据技术有限公司 | Lottery tickets machine self-aided terminal and its lamp light control method |
| CN106782378B (en) * | 2016-12-28 | 2019-12-31 | 青岛海信电器股份有限公司 | Backlight brightness acquisition method and device, data processing method and device thereof and liquid crystal display device |
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