CN108415799B - Time delay measuring system - Google Patents
Time delay measuring system Download PDFInfo
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- CN108415799B CN108415799B CN201810143185.XA CN201810143185A CN108415799B CN 108415799 B CN108415799 B CN 108415799B CN 201810143185 A CN201810143185 A CN 201810143185A CN 108415799 B CN108415799 B CN 108415799B
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- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
- G06F11/2205—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested
- G06F11/2221—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing using arrangements specific to the hardware being tested to test input/output devices or peripheral units
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Abstract
The invention relates to the technical field of virtual reality and measurement, in particular to a time delay measurement system. The delay measurement system is applied to measuring the delay of the virtual reality display equipment. The delay measurement system includes a delay measurement device and a measurement control tool. The time delay measuring equipment comprises a processor, and a gyroscope, a left photosensitive probe and a right photosensitive probe which are electrically connected with the processor. The measurement control tool is used for being installed on the virtual reality display equipment to be measured when time delay measurement is carried out. And the delay measuring equipment is fixed on the virtual reality display equipment when carrying out delay measurement. The delay measurement system can objectively measure the left delay and the right delay of the virtual reality display equipment, and the integrity of the virtual reality display equipment is not damaged.
Description
Technical Field
The invention relates to the technical field of virtual reality and measurement, in particular to a time delay measurement system.
Background
For the virtual reality display device, the picture content displayed on the screen needs to be updated in time along with the rotation of the head. Starting from the user's motion, until the corresponding image change is referred to as the motion-to-photo latency of the virtual reality display device. The delay is one of the most important parameters of the virtual reality display device, and if the delay is too large, discomfort such as dizziness of a user can be caused. The commercially available virtual reality products generally artificially estimate the labeled delay parameters, but have no special equipment or instrument for detecting the reliability of the delay parameters.
Disclosure of Invention
In view of the above, the present invention provides a delay measurement system capable of objectively and accurately measuring a delay of a virtual reality display device, so as to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a time delay measuring system, which is applied to measuring the time delay of virtual reality display equipment and comprises time delay measuring equipment and a measurement control tool, wherein the time delay measuring equipment comprises a processor, and a gyroscope, a left photosensitive probe and a right photosensitive probe which are electrically connected with the processor;
the measurement control tool is used for being installed on virtual reality display equipment to be measured when time delay measurement is carried out, controlling a left display area and a right display area of the virtual reality display equipment to simultaneously display a first picture when the virtual reality display equipment is kept static, controlling the left display area and the right display area of the virtual reality display equipment to display a second picture when the virtual reality display equipment moves, and enabling the light intensity and/or the light color of the first picture and the light color of the second picture to be different;
the delay measurement equipment is used for being fixed on the virtual reality display equipment during delay measurement;
the processor is used for judging the motion state of the virtual reality display equipment according to the measurement data of the gyroscope, recording the moment when the virtual reality display equipment changes from static state to motion, and recording the moment as a first moment;
the left photosensitive probe and the right photosensitive probe are respectively used for measuring the light intensity and/or light color of the display pictures of the left display area and the right display area;
the processor is further configured to identify a time when the left display region is converted from displaying the first picture to displaying the second picture according to the light intensity and/or the light color measured by the left photosensitive probe, record the time as a second time, and obtain a left delay of the virtual reality display device according to the first time and the second time;
the processor is further configured to identify a time when the right display area is switched from displaying the first picture to displaying the second picture according to the light intensity and/or the light color measured by the right photosensitive probe, record the time as a third time, and obtain the right delay of the virtual reality display device according to the first time and the third time.
Optionally, the delay measuring device further includes a light source, and the processor is further configured to control light intensity of the light source to change according to a preset rule during self-calibration, and record a time for controlling the light source, which is recorded as a fourth time;
the left photosensitive probe and the right photosensitive probe are also used for measuring the light intensity and/or the light color of the light source;
the processor is further configured to identify a time when the light intensity of the light source changes according to the light intensity and/or the light color of the left photosensitive probe, record the time as a fifth time, and calculate a time difference between the fifth time and the fourth time to obtain a left delay of the delay measurement device;
the processor is further configured to obtain a left delay of the virtual reality display device according to the first time, the second time and the left delay of the delay measurement device;
the processor is further configured to identify a time when the light intensity of the light source changes according to the light intensity and/or the light color of the right photosensitive probe, record the time as a sixth time, and calculate a time difference between the sixth time and the fourth time to obtain a right delay of the delay measurement device;
the processor is further configured to obtain a right delay of the virtual reality display device according to the first time, the third time and the right delay of the delay measurement device.
Optionally, the time delay measuring device further includes a left light source and a right light source, and the processor is further configured to control light intensities of the left light source and the right light source to change simultaneously according to a preset rule during self-calibration, and record a time for controlling the left light source and the right light source, which is recorded as a seventh time;
the left photosensitive probe and the right photosensitive probe are also used for respectively measuring the luminous intensity and/or the light color of the left light source and the right light source;
the processor is further configured to identify a time when the light intensity of the left light source changes according to the light intensity and/or the light color of the left photosensitive probe, record the time as an eighth time, and calculate a time difference between the eighth time and the seventh time to obtain a left delay of the delay measurement device;
the processor is further configured to obtain a left delay of the virtual reality display device according to the first time, the second time and the left delay of the delay measurement device;
the processor is further configured to identify a time when the light intensity of the right light source changes according to the light intensity and/or the light color of the right photosensitive probe, record the time as a ninth time, and calculate a time difference between the ninth time and the seventh time to obtain a right delay of the delay measurement device;
the processor is further configured to obtain a right delay of the virtual reality display device according to the first time, the third time and the right delay of the delay measurement device.
Optionally, the first picture is a black screen, and the display areas of the second picture in the left display area or the right display area are respectively smaller than the areas of the left display area and the right display area.
Optionally, the delay measuring device further includes a left light shielding member and a right light shielding member respectively covering the left photosensitive probe and the right photosensitive probe.
Optionally, the left light-shielding member and the right light-shielding member are both black rubber heads in a bowl shape.
Optionally, the second screen includes a first pattern and a second pattern respectively displayed at a first position and a second position of the left display area;
the measurement control tool is used for being installed on virtual reality display equipment to be measured during time delay measurement, controlling a left display area of the virtual reality display equipment to display a first picture when the virtual reality display equipment is kept static, controlling a first position and a second position of the left display area of the virtual reality display equipment to respectively display a first pattern and a second pattern when the virtual reality display equipment moves, and enabling the light intensity and/or the light color of the first picture and the first pattern and the light color of the second pattern to be different;
the left photosensitive probe and the right photosensitive probe are also used for measuring the light intensity and/or light color at a first position and a second position of the left display area respectively;
the processor is further used for calculating a time difference between the moment when the first position is converted from a first picture to be displayed and the first moment according to the light intensity and/or the light color measured by the left photosensitive probe, and obtaining the time delay of the first position of the left display area of the virtual reality display equipment according to the time difference;
the processor is further used for calculating a time difference between the moment when the second position is converted from the first picture to the second pattern and the first moment according to the light intensity and/or the light color measured by the right photosensitive probe, and obtaining the time delay of the second position of the left display area of the virtual reality display equipment according to the time difference.
Optionally, the processor is further configured to calculate a time difference between a time when the first position is switched from displaying the first picture to displaying the first pattern and a time when the second position is switched from displaying the first picture to displaying the second pattern, and obtain the refresh direction of the left display area according to the time difference.
Optionally, the first picture is a black screen, the second picture is red, green or blue, and the left photosensitive probe and the right photosensitive probe are amorphous silicon monochromatic color sensors.
Optionally, the left photosensitive probe and the right photosensitive probe are photosensitive sensors.
The delay measuring system provided by the invention can objectively measure the left delay and the right delay of the virtual reality display equipment through the ingenious design of the delay measuring equipment and the measurement control tool, and the integrity of the virtual reality display equipment is not damaged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only some embodiments of the invention and are therefore not to be considered limiting of its scope, for those skilled in the art will be able to derive additional related drawings therefrom without the benefit of the inventive faculty.
Fig. 1 is a block diagram of a delay measurement system according to a preferred embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a delay measuring apparatus according to a preferred embodiment of the present invention.
Fig. 3 is a block diagram of another delay measuring device according to a preferred embodiment of the present invention.
Fig. 4 is a block diagram of another delay measuring device according to a preferred embodiment of the present invention.
1-time delay measurement system; 10-a delay measuring device; 50-measurement control means; 11-a processor; 13-a gyroscope; 15-left photosensitive probe; 17-right photosensitive probe; 18-left shade; 19-right shade; 21-a light source; 23-left light source; 25-right light source.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. In the description of the present invention, the terms "first," "second," "third," "fourth," and the like are used merely to distinguish one description from another, and are not to be construed as merely or implying relative importance.
Referring to fig. 1, fig. 1 is a schematic diagram of a delay measurement system 1 according to an embodiment of the present invention. The delay measurement system 1 is used for measuring the delay of the virtual reality display device. As shown in fig. 1, the delay measurement system 1 includes a delay measurement apparatus 10 and a measurement control means 50. The delay measuring device 10 comprises a processor 11, and a gyroscope 13, a left photosensitive probe 15 and a right photosensitive probe 17 which are electrically connected with the processor 11.
The measurement control means 50 may be a computer program, or a computer readable storage medium or an electronic device storing the computer program. Optionally, in this embodiment, the measurement control tool 50 is a computer program. The measurement control tool 50 is used for being mounted on the virtual reality display device to be measured when performing the delay measurement. While the virtual reality display device remains stationary, the measurement control means 50 controls the left display area and the right display area of the virtual reality display device to simultaneously display a first screen. When the virtual reality display device moves, the measurement control means 50 controls the left display region and the right display region of the virtual reality display device to display a second screen. The first and second pictures differ in light intensity and/or light color. The left display area is a display area of the virtual reality display equipment for displaying a left-eye viewing picture. The right display area is a display area of the virtual reality display device for displaying a right-eye viewing picture. The existing virtual reality display devices are generally of two types, namely a virtual reality display device comprising one display screen and a virtual reality display device comprising two display screens. For a virtual reality display device of one display screen, the left display area is the whole display area of the display screen for displaying the left-eye viewing picture, and the right display area is the whole display area of the display screen for displaying the right-eye viewing picture. For a virtual reality display device with two display screens, the left display area is the whole display area of the left display screen for displaying the left-eye viewing picture, and the right display area is the whole display area of the right display screen for displaying the right-eye viewing picture.
The delay measurement device 10 is used for fixing to the virtual reality display device during delay measurement. The delay measuring device 10 includes a processor 11 and a gyroscope 13 electrically connected to the processor 11. The delay measurement device 10 may further comprise a housing, the processor 11 and gyroscope 13 being arranged inside the housing. The processor 11 is configured to determine a motion state of the virtual reality display device according to the measurement data of the gyroscope 13, and record a time when the virtual reality display device changes from a stationary state to a moving state, which is recorded as a first time. Obviously, after the fixing, the delay measuring device 10 and the virtual reality display device are linked. Then, the measurement data of the gyroscope 13 of the delay measurement device 10 reflects not only the motion state of the delay measurement device 10 but also the motion state of the virtual reality display device. Therefore, the processor 11 of the delay measuring device 10 can determine the motion state of the virtual reality display device according to the measurement data of the gyroscope 13 thereof.
There are various methods of detecting the motion state of the delay measuring device 10 (virtual reality display device) based on the measurement data of the gyroscope 13. For example, the real-time gyroscope data of the delay measurement device 10 is obtained and filtered to obtain filtered real-time gyroscope data; and calculating the length of the filtered real-time gyroscope data, detecting to obtain that the state of the delay measuring equipment 10 is a static state if the length is less than or equal to a first threshold, and detecting to obtain that the state of the delay measuring equipment 10 is a motion state if the length is not greater than the first threshold. For another example, the real-time gyroscope data of the delay measurement device 10 is obtained and filtered to obtain filtered real-time gyroscope data; then obtaining the first n-1 gyroscope data of the delay measurement device 10 and filtering to obtain n filtered gyroscope data, and calculating the mean value of the n filtered gyroscope data; calculating a difference between the filtered real-time gyroscope data and the mean; if the length (square root of the sum of squares of the coordinates) of the filtered real-time gyroscope data is less than or equal to a first threshold value or the length of the difference value is less than or equal to a second threshold value, detecting that the state of the delay measuring equipment 10 is a static state; otherwise, detecting that the state of the delay measuring equipment 10 is a motion state.
The delay measuring device 10 further comprises a left photosensitive probe 15 and a right photosensitive probe 17 electrically connected with the processor 11. The left photosensitive probe 15 and the right photosensitive probe 17 are arranged inside the shell and can be connected with the processor 11 through wires. When the time delay measurement is performed, the left photosensitive probe 15 is used for measuring the light intensity and/or the light color of the display picture of the left display area, and the right photosensitive probe 17 is used for measuring the light intensity and/or the light color of the display picture of the right display area. The left and right photosensitive probes 15 and 17 may be photosensitive sensors sensitive to light intensity. In particular, the left and right photosensitive probes 15 and 17 may also be color-sensitive sensors that can recognize the color of light. The color-sensitive sensor is one of photosensitive sensors, can identify light color, can be said to be sensitive to light intensity and light color, and can also be said to be sensitive to light color.
The type selection of the left photosensitive probe 15 and the right photosensitive probe 17 is matched with the change characteristics of the first picture and the second picture. For example, the first picture may be a black screen, i.e., a screen in which the left display area and the right display area simultaneously display black (a normal screen requiring backlight) or no display (a self-light-emitting screen). The second picture may be a full or partial bright screen, i.e., the left and right display areas are full or partial white with a greater light intensity. The left display area and the right display area are all displayed, namely the display area of the second picture in the left display area or the right display area is equal to the area of the left display area and the right display area respectively. The left display area and the right display area are displayed partially, namely the display areas of the second picture in the left display area or the right display area are respectively smaller than the areas of the left display area and the right display area. Optionally, in this embodiment, when the left display area and the right display area are partially displayed, the display areas of the second screen in the left display area or the right display area are equal. Here, white may be replaced by red, blue, green, or the like.
When the second frame indicates that the left display area and the right display area are all displayed or partially displayed with white color with higher light intensity, the left photosensitive probe 15 and the right photosensitive probe 17 can select photosensitive sensors which are sensitive only to light intensity and insensitive to light color. The ambient light is generally white light, and in order to prevent the ambient light from affecting the left photosensitive probe 15 and the right photosensitive probe 17, it is necessary to prevent or reduce the ambient light from entering the left photosensitive probe 15 and the right photosensitive probe 17 when performing the time delay measurement. Therefore, when the second frame is white with a higher light intensity displayed in the left display area and the right display area or partially displayed, the left photosensitive probe 15 and the left display area can be covered by the first light shielding member and the right photosensitive probe 17 and the right display area can be covered by the second light shielding member during the time delay measurement, so as to prevent the ambient light from entering. The coverage area of the first light shading piece is larger than the area of the left display area displaying white, and the coverage area of the second light shading piece is larger than the area of the right display area displaying white. The first and second light-shielding members may be the time delay measuring device 10 itself or may be provided by the user. Optionally, in this embodiment, the delay measuring device 10 includes a first light shielding member and a second light shielding member, and the first light shielding member and the second light shielding member are made of opaque flexible materials, such as black cotton cloth, a film, and the like.
When the second frame indicates that white with higher light intensity is displayed locally in the left display area and the right display area, the delay measuring device 10 may include a left light shielding member 18 and a right light shielding member 19 respectively covering the left photosensitive probe 15 and the right photosensitive probe 17. The coverage area of the left light-shielding member 18 is larger than the area of the left display area displaying white, and the coverage area of the right light-shielding member 19 is larger than the area of the right display area displaying white. When the time delay measurement is performed, the left light shielding member 18 is arranged to cover a region where white is displayed in the left display region, and the right light shielding member 19 is arranged to cover a region where white is displayed in the right display region. Alternatively, the left and right light shields 18, 19 are black, bowl-shaped rubber heads, similar to the bowl-shaped rubber heads of a rubber plunger, as shown in fig. 2. In the time delay measurement, the left light shielding member 18 and the right light shielding member 19 may be pressed to make the left light shielding member 18 and the right light shielding member 19 adhere to the left display region and the right display region and shield the white display region of the left display region and the right display region, respectively. Alternatively, the areas where the left display area and the right display area display white are circular, rectangular, triangular, parallelogram, and the like.
When the second frame indicates that the left display area and the right display area all display or partially display red, green or blue with higher light intensity, the left photosensitive probe 15 and the right photosensitive probe 17 can select a color-sensitive sensor sensitive to light color. For example, the left and right photosensitive probes 15 and 17 are amorphous silicon monochrome color sensors capable of recognizing red, green, or blue colors. Therefore, the white ambient light does not affect (or the influence can be ignored) the measurement of the left photosensitive probe 15 and the right photosensitive probe 17, and when the time delay measurement is carried out, the ambient light does not need to be shielded, only the shielding piece needs to be arranged between the left display area and the right display area, so that the second picture displayed by the left display area is prevented from interfering with the left photosensitive probe 15 and the second picture displayed by the right display area is prevented from interfering with the left photosensitive probe 17, and the design is simplified. The shielding member may be an opaque sheet.
The processor 11 is further configured to identify, according to the light intensity and/or the light color measured by the left photosensitive probe 15, a time at which the left display region is converted from displaying the first picture to displaying the second picture, which is recorded as a second time, and obtain the left delay of the virtual reality display device according to the first time and the second time. The left time delay of the virtual reality display device represents the time delay of the left display area of the virtual reality display device, namely represents the time from the start of the movement of the virtual reality display device to the display of the second picture in the left display area of the virtual reality display device. Since the moment when the virtual reality display device starts to move is the first moment, if the moment when the left display area of the virtual reality display device displays the second picture is equal to the moment when the processor 11 recognizes that the left display area displays the second picture, that is, the moment when the left display area of the virtual reality display device displays the second picture is equal to the second moment. Then the left delay of the virtual reality display device is equal to the time difference between the second time minus the first time.
Similarly, the processor 11 is further configured to identify, according to the light intensity and/or the light color measured by the right photosensitive probe 17, a time when the right display area is switched from displaying the first picture to displaying the second picture, which is recorded as a third time, and obtain the right delay of the virtual reality display device according to the first time and the third time. The right time delay of the virtual reality display device represents the time delay of the right display area of the virtual reality display device, namely represents the time from the start of the movement of the virtual reality display device to the display of the second picture in the right display area of the virtual reality display device. Since the moment when the virtual reality display device starts to move is the first moment, if the moment when the right display area of the virtual reality display device displays the second picture is equal to the moment when the processor 11 recognizes that the right display area displays the second picture, that is, the moment when the right display area of the virtual reality display device displays the second picture is equal to the third moment. Then the right delay of the virtual reality display device is equal to the time difference between the third time minus the first time.
Referring to fig. 3, optionally, the delay measuring apparatus 10 further includes a light source 21. The processor 11 is further configured to control the light intensity of the light source 21 to change according to a preset rule during self-calibration, and record a time for controlling the light source 21, which is recorded as a fourth time. For example, before performing self-calibration, the light source 21 does not emit light; in performing the self-calibration, the processor 11 controls the light source 21 to emit light. The fourth moment is the moment at which the processor 11 issues a control instruction. Since the time from the sending of the control command by the processor 11 to the lighting of the light source 21 is short and can be ignored, the time from the sending of the control command by the processor 11 is approximately equal to the time from the lighting of the light source 21, that is, the fourth time is the time from the lighting of the light source 21. The left photosensitive probe 15 and the right photosensitive probe 17 are also used for measuring the light intensity and/or the light color of the light source 21. The left photosensitive probe 15 and the right photosensitive probe 17 both face the light source 21 for measurement. The processor 11 is further configured to identify a time when the light intensity of the light source 21 changes according to the light intensity and/or the light color of the left photosensitive probe 15, record the time as a fifth time, and calculate a time difference between the fifth time and the fourth time to obtain a left delay of the delay measurement device 10. The fourth time is the time when the light source 21 emits light, and the fifth time is the time when the processor 11 recognizes the light source 21 to emit light according to the light intensity and/or light color of the left photosensitive probe 15, then the left delay of the delay measurement apparatus 10 represents the time from the time when the light source 21 emits light to the time when the processor 11 recognizes the light source 21 to emit light according to the light intensity and/or light color of the left photosensitive probe 15, that is, the left delay of the delay measurement apparatus 10 includes the detection (photosensitive) time of the left photosensitive probe 15 and the time when the processor 11 processes photosensitive data. As can be seen from the above, the left latency of the virtual reality display device represents that the virtual reality display device starts to move until the left display area of the virtual reality display device displays the second picture, and the time difference between the second time and the first time represents the time from the virtual reality display device starts to move until the processor 11 recognizes that the left display area displays the second picture according to the light intensity and/or light color of the left light sensing probe 15, then the time difference between the second time and the first time includes the left latency of the virtual reality display device, the detection (light sensing) time of the left light sensing probe 15 and the processing time of the processor 11 for processing the light sensing data, that is, the time difference between the second time and the first time includes the left latency of the virtual reality display device and the left latency of the latency measuring device 10. Then, in order to more accurately measure the left delay of the virtual reality display device, the processor 11 is further configured to obtain the left delay of the virtual reality display device according to the first time, the second time and the left delay of the delay measurement device 10. That is, the left delay of the virtual reality display device is equal to the time difference between the second time and the first time minus the left delay of the delay measurement device 10. Similarly, the processor 11 is further configured to identify a time when the light intensity of the light source 21 changes according to the light intensity and/or the light color of the right photosensitive probe 17, record the time as a sixth time, and calculate a time difference between the sixth time and the fourth time to obtain a right delay of the delay measurement device 10. The processor 11 is further configured to obtain a right delay of the virtual reality display device according to the first time, the third time and the right delay of the delay measurement device 10.
Since the time from the issuance of the display instruction by the processor 11 to the change of the display screen is longer, it is much longer than the time from the issuance of the control instruction by the processor 11 to the light emission of the light source 21. Therefore, in the self-calibration process, the left photosensitive probe 15 and the right photosensitive probe 17 detect the light intensity change of the light source 21 instead of the picture change of the display screen of the analog virtual reality display device, so that the time delay of the display picture change from the display instruction sent by the processor 11 to the display screen is avoided, and the result is more accurate. In the self-calibration process, the detection data of the left photosensitive probe 15 and the right photosensitive probe 17 in the two self-calibration and time delay measurement processes can be closer by setting the color and the light intensity of the light of the second picture and the color and the light intensity of the light source 21, so that the time delay of the obtained virtual reality display device is more accurate. Similarly, in the self-calibration, the light shielding and exposure design may be performed according to the type of the light source 21. For example, when the second frame indicates that the left display area and the right display area are all displayed or a part of the left display area is displayed in white with higher light intensity, the light source 21 emits white light, and in order to avoid interference of ambient light, the left photosensitive probe 15, the right photosensitive probe 17, and the light source 21 may be covered with an opaque material during self-calibration. For another example, when the second frame indicates that the left display area and the right display area locally display white with higher light intensity, the light source 21 emits white light, and the delay measuring device 10 includes a left light shielding member 18 and a right light shielding member 19 respectively covering the left photosensitive probe 15 and the right photosensitive probe 17. In the self-calibration, the left and right light-blocking members 18 and 19 are pressed to attach the left and right light-blocking members 18 and 19 to the light source 21 and block the light source 21. For another example, when the second frame indicates that the left display area and the right display area all display or partially display red, green, or blue with higher light intensity, the left photosensitive probe 15 and the right photosensitive probe 17 may select a color sensor sensitive to light color, and may not need a light-shielding object during self-calibration.
Referring to fig. 4, similarly, the one light source 21 may be replaced by a left light source 23 and a right light source 25 arranged left and right. The processor 11 is further configured to control the light intensities of the left light source 23 and the right light source 25 to change simultaneously according to a preset rule during self-calibration, and record a time for controlling the left light source 23 and the right light source 25, which is recorded as a seventh time. The left photosensitive probe 15 and the right photosensitive probe 17 are further used for measuring the luminous intensity and/or the light color of the left light source 23 and the right light source 25, respectively. The processor 11 is further configured to identify a time when the light intensity of the left light source 23 changes according to the light intensity and/or the light color of the left photosensitive probe 15, record the time as an eighth time, and calculate a time difference between the eighth time and the seventh time to obtain a left delay of the delay measurement device 10. The processor 11 is further configured to obtain the left delay of the virtual reality display device according to the first time, the second time, and the left delay of the delay measurement device 10. The processor 11 is further configured to identify a time when the light intensity of the right light source 25 changes according to the light intensity and/or the light color of the right photosensitive probe 17, record the time as a ninth time, and calculate a time difference between the ninth time and the seventh time to obtain a right delay of the delay measurement device 10. The processor 11 is further configured to obtain a right delay of the virtual reality display device according to the first time, the third time and the right delay of the delay measurement device 10.
When the delay measuring device 10 comprises the left light shielding member 18 and the right light shielding member 19 respectively covering the left photosensitive probe 15 and the right photosensitive probe 17, the light shielding during self-calibration can be facilitated by adopting the design of the left light source 23 and the right light source 25 instead of one light source 21. That is, in the self-calibration, the left shade 18 is provided to cover the left light source 23, and the right shade 19 is provided to cover the right light source 25. And, the color and light intensity of the light of the second picture and the color and light intensity of the left light source 23 and the right light source 25 can be set, so that the detection data of the left photosensitive probe 15 and the right photosensitive probe 17 in the two processes of self-calibration and time delay measurement can be closer, and the time delay of the obtained virtual reality display device can be more accurate.
It will be appreciated that the left and right photoreceptors 15, 17 may also be used to measure the time delays at different locations of the left or right display area and the refresh direction of the left or right display area. For example, for the left display area, the second screen includes a first pattern and a second pattern displayed at a first position and a second position of the left display area, respectively; for the right display area, the second screen includes a third pattern and a fourth pattern respectively displayed at a third position and a fourth position of the right display area. The first pattern and the second pattern are separated by a certain distance, the third pattern and the fourth pattern are separated by a certain distance, and the third pattern and the fourth pattern are separated by a certain distance. The following description will be given taking as an example the time delay for the left and right photoreceptors 15 and 17 to measure the first and second positions of the left display region and the refresh direction of the left display region. The delay measuring device 10 may include a left light shielding member 18 and a right light shielding member 19 respectively covering the left photosensitive probe 15 and the right photosensitive probe 17, and the left photosensitive probe 15 and the right photosensitive probe 17 are respectively used for measuring the light intensity and/or the light color at the first position and the second position of the left display region. Before the time delay measurement is carried out, the left light shading piece 18 is arranged at a first position of the left display area in a shielding mode, the right light shading piece 19 is arranged at a second position of the left display area in a shielding mode, and then the measurement is started. The processor 11 calculates a time difference between a time when the first position is converted from displaying the first picture (for example, a black screen) to displaying the first pattern and the first time according to the light intensity and/or the light color measured by the left photosensitive probe 15, and obtains the time delay of the first position of the left display area of the virtual reality display device according to the accuracy requirement in combination or non-combination with the left time delay of the time delay measuring device 10. The processor 11 calculates a time difference between the time when the second position is converted from displaying the first picture (for example, a black screen) to displaying the second pattern and the first time according to the light intensity and/or the light color measured by the right photosensitive probe 17, and obtains the time delay of the second position of the left display area of the virtual reality display device according to the accuracy requirement in combination or non-combination with the right time delay of the time delay measurement device 10. The processor 11 is further configured to calculate a time difference between a time when the first position is switched from displaying the first picture (e.g., black screen) to displaying the first pattern and a time when the second position is switched from displaying the first picture (e.g., black screen) to displaying the second pattern, that is, the display time difference between the first position and the second position can be obtained. The first position and the second position can be arranged up and down or left and right, and the refreshing direction of the left display area can be obtained as left to right, right to left, top to bottom or bottom to top according to the display time difference of the first position and the second position. Since the time delay for measuring the third position and the fourth position of the right display region by using the left photosensitive probe 15 and the right photosensitive probe 17 and the refresh direction of the right display region are similar to the above process, no further description is given for saving space.
It should be noted that the left photosensitive probe 15 and the right photosensitive probe 17 are only for difference description and can be interchanged. The left display area and the right display area are only used for distinguishing and can be interchanged. Moreover, the left photosensitive probe 15 and the right photosensitive probe 17 may refer to one photosensitive probe, at this time, the right delay of the delay measurement device 10 is equal to the left delay of the delay measurement device 10, and then the right delay of the virtual reality display device is: the left photosensitive probe 15 measures the light intensity and/or light color of the display image of the right display area, the processor 11 identifies the time difference between the time when the right display area is switched from displaying the first image to displaying the second image and the first time according to the light intensity and/or light color measured by the left photosensitive probe 15, and the left delay of the delay measurement device 10 is combined or not combined according to the precision requirement.
In practical implementation, the delay measuring device 10 may further include a display electrically connected to the processor 11 for displaying the measurement result. The delay measuring device 10 may further include at least one of a WiFi module, a bluetooth module, a USB module, an ethernet interface, etc. electrically connected to the processor 11, for communicating with an external device. The delay measurement device 10 may also include a plurality of input keys, such as a switch key, a self calibration key, a measurement key, a confirmation key, etc., electrically connected to the processor 11.
The delay measurement system 1 provided by the embodiment of the invention can objectively measure the left delay and the right delay of the virtual reality display device by skillfully designing the delay measurement device 10 and the measurement control tool 50, does not damage the integrity of the virtual reality display device, and has a self-calibration function, so that the measurement result is more accurate.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (14)
1. The delay measuring equipment is characterized by being applied to measuring the delay of virtual reality display equipment and comprising a processor, a gyroscope, a left photosensitive probe and a right photosensitive probe, wherein the gyroscope, the left photosensitive probe and the right photosensitive probe are electrically connected with the processor;
the delay measurement equipment is used for being fixed on the virtual reality display equipment during delay measurement;
the processor is used for judging the motion state of the virtual reality display equipment according to the measurement data of the gyroscope, recording the moment when the virtual reality display equipment changes from static state to motion, and recording the moment as a first moment;
the left photosensitive probe and the right photosensitive probe are respectively used for measuring the light intensity and/or light color of the display pictures of the left display area and the right display area;
the processor is further configured to identify a time when the left display area is converted from displaying a first picture to displaying a second picture according to the light intensity and/or the light color measured by the left photosensitive probe, record the time as a second time, and obtain a left delay of the virtual reality display device according to the first time and the second time;
the processor is further configured to identify a time when the right display area is switched from displaying the first picture to displaying the second picture according to the light intensity and/or the light color measured by the right photosensitive probe, record the time as a third time, and obtain a right delay of the virtual reality display device according to the first time and the third time;
the first picture is a picture displayed in a left display area and a right display area of the virtual reality display equipment when the virtual reality display equipment is kept still, the second picture is a picture displayed in the left display area and the right display area of the virtual reality display equipment when the virtual reality display equipment moves, and the light intensity and/or the light color of the first picture is different from that of the second picture;
the time delay measuring equipment further comprises a light source, and the processor is further used for controlling the light intensity of the light source to change according to a preset rule and recording the time for controlling the light source as a fourth time when self-calibration is carried out;
the left photosensitive probe and the right photosensitive probe are also used for measuring the light intensity and/or the light color of the light source;
the processor is further configured to identify a time when the light intensity of the light source changes according to the light intensity and/or the light color of the left photosensitive probe, record the time as a fifth time, and calculate a time difference between the fifth time and the fourth time to obtain a left delay of the delay measurement device;
the processor is further configured to obtain a left delay of the virtual reality display device according to the first time, the second time and the left delay of the delay measurement device;
the processor is further configured to identify a time when the light intensity of the light source changes according to the light intensity and/or the light color of the right photosensitive probe, record the time as a sixth time, and calculate a time difference between the sixth time and the fourth time to obtain a right delay of the delay measurement device;
the processor is further configured to obtain a right delay of the virtual reality display device according to the first time, the third time and the right delay of the delay measurement device.
2. The delay measurement device of claim 1, further comprising left and right light shields covering the left and right photosensitive probes, respectively.
3. The delay measurement device of claim 2, wherein the left and right light shields are black, bowl-shaped rubber heads.
4. The latency measurement device of claim 3, wherein the left and right photosensitive probes are further configured to measure light intensity and/or light color at first and second locations of the left display region, respectively;
the processor is further used for calculating a time difference between the moment when the first position is converted from displaying the first picture to displaying the first pattern and the first moment according to the light intensity and/or the light color measured by the left photosensitive probe, and obtaining the time delay of the first position of the left display area of the virtual reality display device according to the time difference between the moment when the first position is converted from displaying the first picture to displaying the first pattern and the first moment;
the processor is further used for calculating a time difference between the moment when the second position is converted from displaying the first picture to displaying the second pattern and the first moment according to the light intensity and/or the light color measured by the right photosensitive probe, and obtaining the time delay of the second position of the left display area of the virtual reality display device according to the time difference between the moment when the second position is converted from displaying the first picture to displaying the second pattern and the first moment;
the first pattern and the second pattern are respectively patterns which are respectively displayed at a first position and a second position of a left display area of the virtual reality display equipment when the virtual reality display equipment moves, and the light intensity and/or light color of the first picture and the first pattern are different from those of the second pattern.
5. The latency measurement apparatus according to claim 4, wherein the processor is further configured to calculate a time difference between a time at which the first position is switched from displaying the first screen to displaying the first pattern and a time at which the second position is switched from displaying the first screen to displaying the second pattern, and the refresh direction of the left display region is obtained from the time difference between the time at which the first position is switched from displaying the first screen to displaying the first pattern and the time at which the second position is switched from displaying the first screen to displaying the second pattern.
6. The delay measurement device of any one of claims 1 to 5, wherein the left and right photosensitive probes are amorphous silicon monochrome color sensors.
7. The delay measurement device of any one of claims 1 to 5, wherein the left and right photosensitive probes are photosensitive sensors.
8. The delay measuring equipment is characterized by being applied to measuring the delay of virtual reality display equipment and comprising a processor, a gyroscope, a left photosensitive probe and a right photosensitive probe, wherein the gyroscope, the left photosensitive probe and the right photosensitive probe are electrically connected with the processor;
the delay measurement equipment is used for being fixed on the virtual reality display equipment during delay measurement;
the processor is used for judging the motion state of the virtual reality display equipment according to the measurement data of the gyroscope, recording the moment when the virtual reality display equipment changes from static state to motion, and recording the moment as a first moment;
the left photosensitive probe and the right photosensitive probe are respectively used for measuring the light intensity and/or light color of the display pictures of the left display area and the right display area;
the processor is further configured to identify a time when the left display area is converted from displaying a first picture to displaying a second picture according to the light intensity and/or the light color measured by the left photosensitive probe, record the time as a second time, and obtain a left delay of the virtual reality display device according to the first time and the second time;
the processor is further configured to identify a time when the right display area is switched from displaying the first picture to displaying the second picture according to the light intensity and/or the light color measured by the right photosensitive probe, record the time as a third time, and obtain a right delay of the virtual reality display device according to the first time and the third time;
the first picture is a picture displayed in a left display area and a right display area of the virtual reality display equipment when the virtual reality display equipment is kept still, the second picture is a picture displayed in the left display area and the right display area of the virtual reality display equipment when the virtual reality display equipment moves, and the light intensity and/or the light color of the first picture is different from that of the second picture;
the processor is also used for controlling the light intensity of the left light source and the light intensity of the right light source to change simultaneously according to a preset rule during self-calibration, recording the time for controlling the left light source and the right light source and recording the time as a seventh time;
the left photosensitive probe and the right photosensitive probe are also used for respectively measuring the luminous intensity and/or the light color of the left light source and the right light source;
the processor is further configured to identify a time when the light intensity of the left light source changes according to the light intensity and/or the light color of the left photosensitive probe, record the time as an eighth time, and calculate a time difference between the eighth time and the seventh time to obtain a left delay of the delay measurement device;
the processor is further configured to obtain a left delay of the virtual reality display device according to the first time, the second time and the left delay of the delay measurement device;
the processor is further configured to identify a time when the light intensity of the right light source changes according to the light intensity and/or the light color of the right photosensitive probe, record the time as a ninth time, and calculate a time difference between the ninth time and the seventh time to obtain a right delay of the delay measurement device;
the processor is further configured to obtain a right delay of the virtual reality display device according to the first time, the third time and the right delay of the delay measurement device.
9. The delay measurement device of claim 8, further comprising left and right light shields covering the left and right photosensitive probes, respectively.
10. The delay measurement device of claim 9, wherein the left and right light shields are black, bowl-shaped rubber heads.
11. The latency measurement device of claim 10, wherein the left and right photosensitive probes are further configured to measure light intensity and/or light color at first and second locations of the left display region, respectively;
the processor is further used for calculating a time difference between the moment when the first position is converted from displaying the first picture to displaying the first pattern and the first moment according to the light intensity and/or the light color measured by the left photosensitive probe, and obtaining the time delay of the first position of the left display area of the virtual reality display device according to the time difference between the moment when the first position is converted from displaying the first picture to displaying the first pattern and the first moment;
the processor is further used for calculating a time difference between the moment when the second position is converted from displaying the first picture to displaying the second pattern and the first moment according to the light intensity and/or the light color measured by the right photosensitive probe, and obtaining the time delay of the second position of the left display area of the virtual reality display device according to the time difference between the moment when the second position is converted from displaying the first picture to displaying the second pattern and the first moment;
the first pattern and the second pattern are respectively patterns which are respectively displayed at a first position and a second position of a left display area of the virtual reality display equipment when the virtual reality display equipment moves, and the light intensity and/or light color of the first picture and the first pattern are different from those of the second pattern.
12. The latency measurement apparatus according to claim 11, wherein the processor is further configured to calculate a time difference between a time at which the first position is switched from displaying the first screen to displaying the first pattern and a time at which the second position is switched from displaying the first screen to displaying the second pattern, and the refresh direction of the left display area is obtained from the time difference between the time at which the first position is switched from displaying the first screen to displaying the first pattern and the time at which the second position is switched from displaying the first screen to displaying the second pattern.
13. The delay measurement device of any one of claims 8 to 12, wherein the left and right photosensitive probes are amorphous silicon monochrome color sensors.
14. The delay measurement device of any one of claims 8 to 12 wherein the left and right photosensitive probes are photosensitive sensors.
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