Screen brightness detection device
By integrating power management, buck circuit, photosensor and temperature compensation module, and combining with microcontroller module for signal processing and communication, the problem of large size and high cost of screen brightness detection equipment is solved, and low-cost and high-efficiency brightness detection effect is achieved.
Patent Information
- Application Number
- CN202423211447.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-25
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-25
AI Technical Summary
Existing screen brightness testing equipment is bulky, expensive, and inconvenient to operate in complex environments, making it difficult to meet the high-efficiency testing needs of production lines.
It employs a power management module, a step-down circuit module, a microcontroller module, a photosensor module, and a temperature acquisition and compensation module, combined with signal processing and communication mechanisms. The microcontroller module receives data from the photosensor and performs temperature compensation and analog-to-digital conversion to achieve accurate transmission and display of brightness data.
It enables low-cost and efficient brightness detection in a continuous operation environment, reduces reliance on complex hardware, and ensures measurement accuracy and real-time monitoring capabilities.
Smart Images
Figure CN223525991U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of screen production line brightness detection, is applicable to the production process detection of vehicle and industrial control screen product, and specifically relates to a screen brightness detection device. BACKGROUND
[0002] In modern automobiles, display screens have become an indispensable component, which are widely used in instrument panels, center consoles and co-pilot positions to display key information to drivers and passengers. However, the visibility of display screens is significantly affected by environmental lighting conditions. In strong light environments, if the brightness of the display screen is not sufficient to counteract external light, users will have difficulty identifying information on the screen; on the contrary, in dark light environments, an overly bright display screen will produce glare, not only causing visual discomfort to users, but also possibly causing visual fatigue and increasing the risk of misreading information, thus endangering driving safety. Therefore, it is crucial to ensure that display screens can provide clear and comfortable visual experience under different lighting conditions.
[0003] Therefore, display screens must undergo strict brightness detection during the production process. Currently, there are two main methods for brightness detection: imaging type luminance meter and spectral type luminance meter. The working principle of the imaging type luminance meter is to image the light source on the CCD photosensitive surface, or to collect images through a lens using machine vision technology, and to obtain brightness data by using algorithms. A typical structure of this method is the Kepler telescope, which contains two light paths: one for visual aiming, and the other for detection. However, this structure results in a large overall device size, which is not conducive to portability and integration. In addition, the imaging type luminance meter needs to integrate multiple precision components such as objective lens, condenser lens and photodetector, which not only increases the size and complexity of the device, but also increases the manufacturing and maintenance costs. The spectral type luminance meter is to decompose the light into different wavelength beams by a spectrometer, then read the light intensity on the detector, and calculate the brightness based on the detected spectral data. This method usually requires the use of high-precision photodetectors and color filter sets, as well as complex optical systems, which have high production costs. Especially when XYZ color filter sets are used to calculate the chroma and brightness of the measured object point, this configuration not only increases the manufacturing cost, but also increases the maintenance and calibration cost. In a production environment with a large number of testers, heavy testing tasks and limited space, it is not practical to use large and expensive equipment for brightness measurement. Although both methods can provide accurate brightness measurement, they require complex optical path design and specific testing environment, including temperature control conditions, which results in large testing equipment size, strict operating environment requirements and high cost. SUMMARY
[0004] The utility model provides a simple structure, detects effectual, low in cost's screen brightness detection device.
[0005] The screen brightness detection device, comprising power management module, voltage reduction circuit module, singlechip module, photosensitive sensor module, temperature acquisition compensation module,
[0006] One end of the photosensitive sensor module is connected with the singlechip module, and the other end is connected with the power management module, for receiving the light of the measured screen, and converting the received light brightness of different intensities into corresponding changed electric signal values and transmitting to the singlechip module.
[0007] One end of the temperature acquisition compensation module is connected with the singlechip module, and the other end is connected with the power management module, for detecting the working environment temperature of the photosensitive sensor module and transmitting the working environment temperature information to the singlechip module.
[0008] The voltage reduction circuit module is connected between the power management module and the singlechip module, and converts the voltage into the voltage that can drive the singlechip to work.
[0009] Further, the upper computer is further connected with the singlechip module in communication.
[0010] Further, the photosensitive sensor module is single photosensitive sensor or multiple matrix photosensitive sensors, one end of which is connected with the pin of the singlechip module, and the other end is connected with the power management module.
[0011] Further, the photosensitive sensor module and the singlechip module are further connected with the operational amplifier.
[0012] Further, the temperature acquisition compensation module and the singlechip module are further connected with the operational amplifier.
[0013] Further, the voltage reduction circuit module comprises the voltage stabilizing chip, the capacitor, the power inductance, the self-recovery fuse and the protection resistance connected in sequence.
[0014] The screen brightness detection device, through the single-chip microcomputer module, receives the working environment temperature information from the temperature collection compensation module and is used for dynamically adjusting the output signal of the photosensitive sensor module, so as to ensure that the voltage is stable when the temperature changes, and the signal processing algorithm written in the single-chip microcomputer is used to establish a mathematical model according to the output data of the photosensitive sensor module at different temperatures, the measurement error caused by the temperature change is predicted and corrected through the mathematical model, so as to improve the accuracy of the measurement data; the single-chip microcomputer module is used to receive the brightness information transmitted by the photosensitive sensor module to carry out analog-digital conversion, the analog signal is converted into a digital signal, and the communication between the single-chip microcomputer module and the upper computer (such as a computer) is realized through the TCP / IP protocol. In this way, the converted brightness data can be transmitted to the computer and displayed on the screen, which is convenient for users to monitor and analyze in real time. The utility model reduces the dependence on complex hardware, reduces the cost, and ensures the measurement accuracy through accurate temperature compensation and signal processing. Through the integration of temperature compensation, signal processing and communication mechanism, the economic and efficient brightness detection is realized, and is suitable for flow operation environment. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a kind of screen brightness detection device structure block diagram. DETAILED DESCRIPTION
[0016] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.
[0017] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial, …), the directional indications are only used to explain the relative position relationship, movement condition and the like between the components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directional indications also change accordingly.
[0018] If the embodiments of the utility model have involved the description of "first" or "second", etc., the description of "first" or "second" etc. is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical features of each embodiment can be combined arbitrarily, and for the sake of brevity, all possible combinations of the technical features in the embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the description.
[0019] As shown in Figure 1 A screen brightness detection device comprises a power management module, a voltage reduction circuit module, a single-chip microcomputer module, a photosensitive sensor module and a temperature acquisition compensation module.
[0020] One end of the photosensitive sensor module is connected with the single-chip microcomputer module, and the other end is connected with the power management module, for receiving the light of the measured screen, and converting the received light brightness of different intensities into corresponding changing electrical signal values and transmitting the electrical signal values to the single-chip microcomputer module.
[0021] One end of the temperature acquisition compensation module is connected with the single-chip microcomputer module, and the other end is connected with the power management module, for detecting the working environment temperature of the photosensitive sensor module and transmitting the working environment temperature information of the photosensitive sensor module to the single-chip microcomputer module.
[0022] The voltage reduction circuit module is connected between the power management module and the single-chip microcomputer module, for converting the voltage into a voltage that can drive the single-chip microcomputer to work.
[0023] The screen brightness detection device receives the working environment temperature information from the temperature acquisition compensation module through the single-chip microcomputer module and uses the working environment temperature information to dynamically adjust the output signal of the photosensitive sensor module, so as to ensure that the voltage of the photosensitive sensor module remains stable when the temperature changes, and uses the signal processing algorithm written in the single-chip microcomputer to establish a mathematical model according to the output data of the photosensitive sensor module at different temperatures, predicts and corrects the measurement error caused by the temperature change through the mathematical model, so as to improve the accuracy of the measurement data. Then, the single-chip microcomputer module receives the brightness information transmitted by the photosensitive sensor module, performs analog-digital conversion, converts the analog signal into a digital signal, and realizes the communication between the single-chip microcomputer module and the host computer (such as a computer) through the TCP / IP protocol. In this way, the converted brightness data can be transmitted to the computer and displayed on the screen, which is convenient for users to monitor and analyze in real time. The utility model reduces the dependence on complex hardware, reduces the cost, and ensures the measurement accuracy through accurate temperature compensation and signal processing. Through the integration of temperature compensation, signal processing and communication mechanism, the utility model realizes economical and efficient brightness detection, and is suitable for flow production environment.
[0024] Further, the single-chip microcomputer module is connected with a host computer 6, and the single-chip microcomputer is connected with the host computer through TCP / IP protocol, and the host computer can be a computer, and the host computer displays the analog-digital conversion result on the computer through the ADC module (analog-digital converter, ADC) of the single-chip microcomputer.
[0025] The photosensitive sensor module is a single photosensitive sensor or a plurality of matrix photosensitive sensors, one end of which is connected with a pin of the single-chip microcomputer module, and the other end is connected with the power management module.
[0026] Further, the photosensitive sensor module and the single-chip microcomputer module are further connected with an operational amplifier, and the temperature acquisition compensation module and the single-chip microcomputer module are further connected with an operational amplifier.
[0027] The voltage reduction circuit module comprises a voltage stabilizing chip, a capacitor, a power inductor, a self-recovery fuse and a protection resistor connected in sequence, so as to convert the voltage into a voltage that can drive the single-chip microcomputer to work.
[0028] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields within the scope of the present application is included in the patent protection range of the present application.
[0029] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge range of ordinary skilled persons in the art without departing from the purpose of the present application. In addition, the embodiments and the features in the embodiments of the present application can be combined with each other without conflict.
Claims
1. A screen brightness detection apparatus, characterized by comprising: It comprises a power management module (1), a step-down circuit module (2), a single-chip microcomputer module (3), a photosensitive sensor module (4), and a temperature acquisition compensation module (5). One end of the photosensitive sensor module is connected with the single-chip microcomputer module, and the other end is connected with the power management module, for receiving light of a screen to be measured, converting the received light of different intensities into corresponding varying electrical signal values, and transmitting the electrical signal values to the single-chip microcomputer module. One end of the temperature acquisition compensation module is connected with the single-chip microcomputer module, and the other end is connected with the power management module, for detecting the working environment temperature of the photosensitive sensor module and transmitting the working environment temperature information to the single-chip microcomputer module. The step-down circuit module is connected between the power management module and the single-chip microcomputer module, for converting voltage into voltage that can drive the single-chip microcomputer to work.
2. The screen brightness detection apparatus according to claim 1, characterized by It further comprises a host computer (6) in communication connection with the single-chip microcomputer module.
3. The screen brightness detection apparatus according to claim 1, characterized by The photosensitive sensor module is a single photosensitive sensor or a plurality of matrix photosensitive sensors, one end of which is connected with a pin of the single-chip microcomputer module, and the other end is connected with the power management module.
4. The screen brightness detection apparatus according to claim 1, characterized by An operational amplifier is further connected between the photosensitive sensor module and the single-chip microcomputer module.
5. The screen brightness detection apparatus according to claim 1, wherein An operational amplifier is further connected between the temperature acquisition compensation module and the single-chip microcomputer module.
6. The screen brightness detection apparatus according to claim 1, wherein The step-down circuit module comprises a voltage stabilizing chip, a capacitor, a power inductor, a self-recovery fuse, and a protection resistor connected in sequence.