WO2015014154A1 - Method and apparatus for evaluating brightness uniformity of naked eye three-dimensional display apparatus - Google Patents

Abstract

A method and an apparatus for evaluating brightness uniformity of a naked eye three-dimensional display apparatus. The method comprises: controlling a display panel (20) of the naked eye three-dimensional display apparatus to sequentially display N viewpoint images, the display panel (20) comprising multiple sub-pixels; when each viewpoint image is displayed, sub pixels used for displaying a current viewpoint image displaying a white image, sub pixels used for displaying another viewpoint image displaying a black image, and sequentially obtaining brightness values of light rays at M test angles corresponding to the current viewpoint image on a light emergence side of the naked eye three-dimensional display apparatus; determining a brightness peak value of all the obtained brightness values; evaluating the brightness uniformity of the naked eye three-dimensional display apparatus according to the proximity to 1 of the ratio between the brightness peak values corresponding to every two adjacent test angles, N and M being positive integers not less than 2. The evaluation method and apparatus can improve the accuracy of the brightness uniformity of the naked eye three-dimensional display apparatus.

Description

 Method and device for evaluating brightness uniformity of stereoscopic display device

 Embodiments of the present invention relate to a method and apparatus for evaluating brightness uniformity of a stereoscopic display device. Background technique

 At present, eye-catching 3D display in three-dimensional (3D) display technology has attracted much attention.

 The implementation principle of the eye 3D display is as shown in FIG. 1 . The eye-type 3D display device includes at least a display panel 200 and a grating 100 located on the light exiting side of the display panel 200. The grating 100 can make the light emitted by the left eye pixel of the display panel 200. The light is emitted to the viewer's left eye, and the light emitted by the right eye pixel is directed to the viewer's right eye, thereby achieving the effect of 3D display.

 For the eye 3D display, people are most concerned about the stereoscopic display effect. The viewing area on the light-emitting side of the display device is a left-eye view area and a right-eye view area arranged at intervals. When the human eye is located in the adjacent two left-eye view areas and the right-eye view area, a stereoscopic image can be seen, but if adjacent When the difference in brightness between the two left-eye viewing zones and the right-eye viewing zone is large, it is easy for the viewer to cause an adverse reaction such as dizziness.

 Therefore, it is necessary to evaluate the brightness uniformity of each viewing zone of the eye-catching 3D display device.

 In the prior art, the brightness uniformity of each viewing zone of the 3D display device is evaluated mainly by human visual judgment, which is a subjective qualitative evaluation, and therefore it is necessary to more accurately evaluate the brightness uniformity of the eye 3D display device. Summary of the invention

 The embodiment of the invention provides a method and a device for evaluating the brightness uniformity of the stereoscopic display device, which can improve the accuracy of evaluating the brightness uniformity of the stereoscopic display device.

In one aspect, an embodiment of the present invention provides a method for evaluating luminance uniformity of a stereoscopic display device, comprising: controlling a display panel of the stereoscopic display device to sequentially display N viewpoint images, wherein the display panel includes a plurality of sub-pixels; when displaying each of the viewpoint images, each sub-pixel for displaying the current viewpoint image displays a white image, and each sub-pixel for displaying other viewpoint images displays a black image, and the stereoscopic display device emits light Side to get the current viewpoint a brightness value of the light at the M test angles corresponding to the image; determining a brightness peak value among the obtained brightness values; and a ratio between the brightness peak values corresponding to any two adjacent test angles

The degree of closeness of 1 is evaluated for the brightness uniformity of the stereoscopic display device of the eye, wherein N, M is a positive integer not less than 2.

 On the other hand, the embodiment of the present invention further provides an apparatus for evaluating brightness uniformity of a stereoscopic display device, comprising: a brightness acquiring unit, configured to sequentially display N viewpoint images on a display panel of the eye stereoscopic display device In each of the viewpoint images, the brightness values of the light of the M test angles corresponding to the current viewpoint image are sequentially acquired on the light exiting side of the stereoscopic display device; wherein N, M are positive integers not less than 2; a determining unit, configured to determine a brightness peak value among the acquired brightness values; and a brightness uniformity evaluation unit, configured to evaluate a ratio between a brightness peak value corresponding to any two adjacent test angles and 1 The brightness uniformity of the stereoscopic display device of the eye. DRAWINGS

 In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is obvious that the drawings in the following description relate only to some embodiments of the present invention, and are not intended to limit the present invention. .

 1 is a schematic structural view of a conventional 3D eye display device;

 2 is a schematic diagram of a sub-pixel arrangement on a display panel according to an embodiment of the present invention;

 FIG. 3 is a schematic diagram of a first set of sub-pixels corresponding to a first view image according to an embodiment of the present disclosure;

 FIG. 4 is a schematic diagram of a second set of sub-pixels corresponding to a second view image according to an embodiment of the present invention; FIG.

 FIG. 5 is a schematic diagram of a third group of sub-pixels corresponding to a third view image according to an embodiment of the present disclosure;

 6 is a schematic diagram of a fourth group of sub-pixels corresponding to a fourth viewpoint image according to an embodiment of the present invention;

7 is a schematic diagram of relative positions between a luminance meter and a display panel according to an embodiment of the present invention; FIG. 8 is a graph showing brightness of light rays at different test angles when displaying four viewpoint images respectively according to an embodiment of the present invention; FIG. 9 is a graph showing a brightness change value of an adjacent view area according to an embodiment of the present invention; and FIG. 10 is an exemplary structural diagram of an apparatus for evaluating brightness uniformity of a stereoscopic display device for an eye according to an embodiment of the present invention. detailed description

 The technical solutions of the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are part of the embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present invention without departing from the scope of the invention are within the scope of the invention.

 Embodiments of the present invention provide a method and a device for evaluating the brightness uniformity of a stereoscopic display device for improving the accuracy of whether the brightness of the stereoscopic display device of the eye is uniform.

 The embodiment of the present invention sequentially displays a plurality of viewpoint images by controlling a display panel of the stereoscopic display device, and sequentially acquires luminance values of light at a plurality of test angles when displaying each viewpoint image, and determines brightness values corresponding to the respective viewpoint images. The brightness peak value is evaluated by comparing the ratio between the brightness peaks corresponding to any two adjacent test angles to 1 and evaluating the brightness uniformity of the eye-eye stereoscopic display device.

 The technical solutions provided by the embodiments of the present invention are specifically described below with reference to the accompanying drawings.

 The method for evaluating luminance uniformity of a stereoscopic display device of a human eye provided by the embodiment of the present invention generally includes the following steps:

 S101. The display panel of the stereoscopic display device controls the N viewpoint images in sequence; when each viewpoint image is displayed, each sub-pixel for displaying the current viewpoint image displays a white image for displaying each sub-pixel of the other viewpoint image. Displaying a black image, sequentially acquiring brightness values of light of M test angles corresponding to the current viewpoint image on the light exiting side of the stereoscopic display device; S102, determining brightness peak values among all acquired brightness values;

 S103. Evaluate brightness uniformity of the stereoscopic display device of the eye according to a ratio between a luminance peak corresponding to any two adjacent test angles and a difference value of 1, wherein N, M are positive integers not less than 2.

It should be noted that each view image corresponds to a part of sub-pixels on the display panel, and each view image corresponds to all sub-pixels on the display panel. When the control display panel displays a certain viewpoint image, each sub-pixel corresponding to the current viewpoint image displays a white image, and the other sub-pixels display black. Image.

 Each brightness peak corresponds to an optimum viewing angle on the light exit side of the eye stereoscopic display device, that is, each brightness peak value is a brightness value obtained at an optimum viewing angle of the light exiting side (also referred to as a viewing zone). In the embodiment of the present invention, different optimal viewing angles correspond to different viewing zones of the light-emitting side of the stereoscopic display device.

 The method for evaluating luminance uniformity of a stereoscopic display device of a human eye provided by the embodiment of the present invention determines that the brightness between the adjacent two viewing zones is uniform by determining a ratio between luminance peaks corresponding to two adjacent viewing zones. Degree, wherein the smaller the difference between the ratio of the adjacent two luminance peaks and 1 is, the more uniform the brightness of the light between the adjacent two viewing zones is, and the less likely the viewer is to stun when viewing the 3D picture. Adverse reactions. On the contrary, the larger the difference between the ratio of the adjacent two luminance peaks and the larger the difference between the two adjacent viewing zones, the more uneven the brightness of the light between the adjacent two viewing zones, and the more likely the viewer is to cause dizziness or the like when viewing the 3D image. reaction.

 Illustratively, M is a positive integer greater than 2. In practice, the value of M may be determined according to actual needs, which is not limited by the embodiment of the present invention.

 Illustratively, after evaluating the brightness uniformity of the eye-stereoscopic display device, the method further includes: determining an amount of change in the brightness peak corresponding to any two adjacent test angles.

 Exemplarily, determining the amount of change of the brightness peak corresponding to any two adjacent test angles includes: bringing the ratio Xi between the brightness peaks corresponding to any two adjacent test angles into the formula:

S = J- T Ui - I) ² , where i = l, 2, 3, ..., n, n is the number of adjacent two brightness peak ratios, determining the adjacent two test angles The ratio between the corresponding luminance peaks is relative to the discrete value s of 1.

 Illustratively, the closer the discrete value S is to the zero value, the better the brightness uniformity, and the s=o is an ideal state in which the brightness is very uniform; the larger the S value, the worse the brightness uniformity.

For example, in step S101 and step S102, the brightness value may be obtained by using the following: For example, for each viewpoint image, the optical test device may be used to sequentially measure the brightness of the light at different test angles on the light exit side of the stereoscopic display device. value. For example, the brightness value of the light at different test angles can be obtained by using a brightness meter, and the brightness value of the light at multiple test angles can be tested at intervals, for example, the light is tested once every 0.5 arc angle. The brightness value. Illustratively, in order to improve the accuracy of evaluating whether the brightness of the stereoscopic display device is uniform, the luminance meter moves in the same plane to measure the luminance values of the light at different test angles on the same plane.

 Since the left and right eyes of the person are on the same horizontal line, the brightness values of the light beams that are located on the same plane to obtain different test angle directions can improve the accuracy of evaluating whether the brightness of the vertical eye display device is uniform with respect to the fixed display panel. Illustratively, the luminance meter can be placed at a constant value from the ground on the light exit side of the stereoscopic display device, that is, the luminance meter can be moved on the same horizontal plane, and each viewpoint image is tested at M test angles. The brightness value.

 Illustratively, in order to further improve the accuracy of evaluating whether the brightness of the stereoscopic display device is uniform, the brightness meter is centered on the light-emitting side of the stereoscopic display device with the center of the display panel as a radius, and the set distance of the viewing image is a radius and At the M test angles on the arc on the same horizontal plane, the luminance values of each viewpoint image at a plurality of test angles are tested.

 In theory, since the light will have a certain loss during the propagation process, the brightness values of the light at different positions in the same test angle direction will have a certain deviation. The farther away from the light source, the smaller the brightness value of the light, and the closer the light is, the greater the brightness value of the light. In the embodiment of the present invention, the brightness meter measures the brightness value of the light at different test angle directions and equidistant from the center of the display panel, thereby improving the accuracy of evaluating whether the brightness of the eye stereoscopic display device is uniform.

 The different positions of the arcs with the center of the display panel as the center of the circle correspond to different test angles. In order to further improve the accuracy of evaluating the brightness of the stereoscopic display device, the brightness values of the light may be measured at the same angle. For example, set the measurement position corresponding to the center of the display panel to 0. Based on this, the luminance meter is moved counterclockwise within the stereoscopic angle range, and the radian angle is 5 respectively. The corresponding position of 10°, 15°, 20°, etc. measures the brightness value of the emitted light, and then corresponds to 0 at the center of the display panel. The measurement position is used as a reference, and the luminance meter is moved clockwise at a radian angle of -5. The brightness value of the emitted light is measured at a corresponding position such as -10°, -15°, -20°. It should be noted that every interval is 5. Measuring the brightness value once is only an example. In practice, the brightness value can be measured once or less with a smaller or larger arc value, for example, the brightness value is measured in steps of 0.5 or 1 degree.

Exemplarily, different positions of the arc with the center of the display panel as the center of the circle correspond to different test angles, and the brightness values of the light may be measured at different angles. For example, near the center of the display panel, between adjacent test angles may be Smaller angles, and farther away from the center of the display panel The area of the adjacent test angles may be separated by a large angle, which is not limited by the embodiment of the present invention.

 Illustratively, for each viewpoint image, the luminance values at the different test angles acquired in steps S101 and S102 need to be saved in the luminance meter.

 For example, in order to more easily acquire the luminance peaks in the luminance values corresponding to the respective viewing zones, respectively obtain the luminance distribution curves of the luminance values corresponding to each of the viewpoint images as a function of the test angle; and the luminance distribution curves corresponding to the respective viewpoint images The image superimposition (that is, the brightness distribution graph corresponding to each viewpoint image is placed in the same rectangular coordinate system), and the plurality of brightness values corresponding to the respective viewpoint images are acquired in the superposed luminance distribution curve, and the plurality of brightness peaks exist in the brightness value. Each brightness peak corresponds to a viewing zone at the light exit side of the eye stereoscopic display device.

 It should be noted that the specific structure of the stereoscopic display device according to the embodiment of the present invention may be a common structure of the stereoscopic display device. For example, the stereoscopic display device includes a display panel and is located on the display. The lenticular lens on the light-emitting side of the panel, the embodiment of the present invention does not limit the structure of the stereoscopic display device, that is, the method and device for evaluating the brightness uniformity of the stereoscopic display device provided by the embodiment of the present invention can be used. For any eye stereo display device.

 Illustratively, an evaluation method for whether the brightness of the eye stereoscopic display device according to the embodiment of the present invention is uniform is described below with reference to a specific example.

 Referring to Fig. 2, the display panel of the stereoscopic display device includes a plurality of sub-pixels distributed in a matrix, and the display panel of the four-view image is exemplified below. 2 includes four sets of sub-pixels, a first set of sub-pixels 1, a second set of sub-pixels 2, a third set of sub-pixels 3, and a fourth set of sub-pixels 4, respectively, for displaying four viewpoint images. The arrangement of each sub-pixel is not limited to the arrangement shown in Fig. 2.

Each of the viewpoint images is displayed on the control display panel. When a certain viewpoint image is displayed, the sub-pixel corresponding to the viewpoint image displays a white image, and each sub-pixel corresponding to the other viewpoint images displays a black image. For example: Referring to FIG. 3, when the first viewpoint image is displayed, the first group of sub-pixels 1 of the control display panel displays a white image, and the other sub-pixels display a black image; referring to FIG. 4, when the second viewpoint image is displayed, the display panel is controlled The second set of sub-pixels 2 displays a white image, and the other sub-pixels display a black image; see FIG. 5, when the third view image is displayed, the third set of sub-pixels 3 of the display panel are controlled A white image is displayed, and other sub-pixels display a black image; Referring to FIG. 6, when the fourth viewpoint image is displayed, the fourth group of sub-pixels 4 that control the display panel display a white image, and the other sub-pixels display a black image.

 Referring to Fig. 7, there is shown the relative position between the luminance meter 10 and the display panel 20 when the luminance value is measured. The brightness meter 10 is located at a center of the center (or also referred to as the center) 0 of the display panel 20, and is moved at different positions on an arc of a radius at which the viewer views the image with the best viewing distance R as a radius, and measures light at different positions. The brightness value. For example, it can be in the range of 30° to -30° at intervals of 5. The radian angle tests a luminance value, and 13 luminance values are sequentially tested for, for example, 13 test angles for each viewpoint image. Of course, luminance values can also be measured at more than 13 or less than 13 test angles, and only one example is given here.

 Illustratively, the method for evaluating whether the brightness of the stereoscopic display device is uniform is the following steps in the display panel of the four-viewpoint image as an example:

 Sl l, the brightness meter in the range of 30 ° to -30 ° interval 5 ° arc angle sequentially test the brightness value Yu, i = l, 2, 3 at different test angles corresponding to the first viewpoint image shown in Figure 3. ,...,13.

Illustratively, the lens of the luminance meter is facing the 0 o'clock in the center of the display panel screen, and the image shown in FIG. 3 is from -30 to 30 as shown in FIG. Within the range of 5° arc angle, a brightness value is tested and tested 13 times in total. The obtained brightness values are sequentially recorded as Yu, Y ₁₂ , ... Υϋ, ... in the order of increasing test angle. .., Y ₁₁₃ ; Y _u is the brightness value of the light at the ith test angle when the first viewpoint image is displayed, and the brightness value at each test angle and the corresponding relationship between the brightness value and the test angle are saved.

S12. The brightness meter sequentially tests the brightness values Y _2i at different test angles corresponding to the second viewpoint image shown in FIG. 4 at intervals of 5° radians in the range of 30° to -30°, i=l, 2, 3 ,...,13.

Illustratively, the lens of the luminance meter is facing the 0 point in the center of the display panel screen, from -30° to 30 shown in FIG. Within the range of 5° arc angle, a brightness value is tested and tested 13 times in total. The obtained brightness values are sequentially recorded as Υ ₂₁ , Υ ₂₂ , ... Y _2i , ... in the order of increasing test angle. , Y ₂₁₃ , save the brightness value at each test angle and the corresponding relationship between the brightness value and the test angle.

S13. The brightness meter sequentially tests the brightness values Y _3i at different test angles corresponding to the third viewpoint image shown in FIG. 5 at intervals of 5° radians in the range of 30° to -30°, i=l, 2, 3 ,...,13.

Illustratively, the lens of the luminance meter is facing the 0 point in the center of the display panel screen, from -30° to 30 shown in FIG. Within the range of 5° arc angle, a brightness value is tested and tested 13 times in total. The obtained brightness values are sequentially recorded as Y ₃₁ , Υ ₃₂ , ... Y _3i , ... in the order of increasing test angle. , Y ₃₁₃ , The brightness value at each test angle and the correspondence between the brightness value and the test angle are saved.

514. The brightness meter sequentially tests the brightness values Y _4i , i=l, 2, 3 at different test angles corresponding to the fourth view image shown in FIG. 6 at intervals of 5° radians in the range of 30° to -30°. , ..., 13.

Illustratively, the lens of the luminance meter is facing the 0 point in the center of the display panel screen, from -30 shown in FIG. To 30. In the range of 5° arc angle, a brightness value is tested and tested 13 times in total. The obtained brightness values are sequentially recorded as Υ ₄₁ , Υ ₄₂ , ... , Y _4i , in the order of increasing test angle. .. ...,

Y ₄₁₃ , storing the brightness value at each test angle and the corresponding relationship between the brightness value and the test angle.

 515, as shown in FIG. 8, according to the step S11 to step S14, the brightness value Yji (j=l, 2, 3, 4; i=l, 2, 3, .., 13) and the brightness values and The corresponding relationship of the test angles is generated to generate a distribution curve of the brightness values as a function of the test angle.

Illustratively, the correspondence between the luminance value _Yu and the test angle ( , α ₂ , α ₃ , ..., α ₁₃ ) corresponding to the first viewpoint image acquired by the luminance meter is generated as shown in FIG. 8 . White light brightness distribution curve of the first viewpoint image at different test angles; the brightness value Y _2i corresponding to the second viewpoint image acquired according to the brightness meter and the test angle Οίι -> (3 ·> . . . (i3 correspondence, generation The white light intensity distribution curve of the second viewpoint image shown in FIG. 8 at different test angles; the corresponding relationship between the brightness value Y _3i corresponding to the third viewpoint image acquired by the luminance meter and the test angle is generated as shown in FIG. 8 The white light intensity distribution curve of the third viewpoint image at different test angles; the brightness Y _4i corresponding to the fourth viewpoint image acquired according to the luminance meter and the test angle (i, (3⁄4, (X3, , α ₁₃ ), the generation relationship is The white light intensity distribution curve of the fourth viewpoint image shown in FIG. 8 at different test angles.

516. Determine a brightness peak of each view image at different test angles in the white light brightness distribution curve corresponding to each view image shown in FIG. 8, that is, determine a plurality of optimal views of each view image on the light exit side of the eye stereoscopic display device. Multiple brightness peaks at the angle, such as from -30. To 30. Within the range, the luminance peaks correspond to L _{l 7} L ₂ , L ₃ , L ₄ , L ₅ , L ₆ , ..., L ₁₂ , L ₁₃ on the ordinate, respectively.

S17. Determine, according to the luminance peaks LL ₂ , L ₃ , L ₄ , L ₅ , L ₆ , ..., L ₁₂ , L ₁₃ , a ratio of luminance values of the outgoing rays at two adjacent viewing zones.

 Illustratively, the ratio between two adjacent luminance peaks is calculated according to formula (1).

Xi=Li/L _i+1 , where i=l, 2, 3, 4, 5, . (1) S18. Calculate the amount of change between each adjacent two luminance peaks.

Illustratively, the degree of dispersion S of the peak ratio of the brightness of the adjacent viewing zone with respect to 1 is obtained, that is, The amount of change in brightness between the stereoscopic viewing zones, the S value, can evaluate the degree of change in brightness of the adjacent viewing zone of the entire stereoscopic display device.

Illustratively, the S value of the degree of dispersion of the reaction is calculated according to formula (2). A coordinate curve of the brightness of the adjacent viewing zone as shown in FIG. 9 is obtained. The vertical axis represents the ratio between the brightness peaks corresponding to the adjacent viewing zones, and the horizontal axis represents the test angle of the test brightness peak.

Where i=l, 2, 3, ..., n, n are the number of brightness peak ratios corresponding to two adjacent viewing zones.

 Illustratively, the closer the S value is to the zero value, the better the brightness uniformity, and the S = 0 is an ideal state in which the brightness is very uniform; the larger the S value, the worse the brightness uniformity. Referring to FIG. 10, an embodiment of the present invention further provides an apparatus for evaluating brightness uniformity of a stereoscopic display device for a human eye, including:

 The brightness acquisition unit 11 is configured to sequentially acquire M test corresponding to the current view image when the view image of the N view images is sequentially displayed on the display panel of the eye stereoscopic display device. The brightness value of the angle of light, where N, M is a positive integer not less than 2;

 The brightness peak determining unit 12 is configured to determine a brightness peak value among all the obtained brightness values; the brightness uniformity evaluating unit 13 is configured to use a ratio between the brightness peaks corresponding to any two adjacent test angles and a difference value, The brightness uniformity of the stereoscopic display device of the eye was evaluated.

 Exemplarily, the brightness acquiring unit 11 is configured to: at the light-emitting side of the eye-eye stereoscopic display device, centered on the center of the display panel, to set the distance as a radius and on an arc on the same horizontal surface, to obtain the current The brightness value of the light emitted by each sub-pixel of the viewpoint image at M test angles.

 Exemplarily, the brightness peak determining unit 12 is configured to: establish a brightness curve according to the brightness values of the light rays respectively acquired at the respective test angles when displaying the respective viewpoint images according to the display panel, and obtain the brightness values according to the brightness curve map The peak brightness.

 Illustratively, the luminance uniformity evaluation unit 13 is configured to determine the amount of change in the luminance peak corresponding to any two adjacent test angles.

Illustratively, the ratio Xi between the luminance peaks corresponding to the two test angles of the luminance uniformity evaluation unit 13 is taken into the formula:

, identify the two adjacent The ratio between the luminance peaks corresponding to the test angle is relative to the discrete value S of 1, where i = 1, 2, 3, ..., n, n is the number of adjacent two luminance peak ratios.

 Illustratively, the brightness acquisition unit 11 in the evaluation device for the brightness uniformity of the eye stereoscopic display device may be a luminance meter in which the measured luminance value may be stored. The brightness acquisition unit 11 can be signal-connected to the brightness peak determination unit 12 to input the measured brightness value to the brightness peak value determination unit 12, thereby establishing a brightness profile of each of the viewpoint images. Illustratively, the brightness graph can be displayed to the tester by, for example, a display screen or the like. In addition, the brightness uniformity evaluation unit 13 may be connected to the brightness acquisition unit 11 and/or the brightness peak determination unit 12 to calculate a ratio between the brightness peaks corresponding to any two adjacent test angles according to the obtained brightness peak value and 1 The difference is the magnitude of the difference, and the result is output to the storage device and/or the display screen for the tester to view the record, thereby evaluating the brightness uniformity of the eye-eye stereoscopic display device.

 It is to be noted that only the main structure and relationship of the brightness uniformity evaluation device of the eye-eye stereoscopic display device according to the embodiment of the present invention are described. For example, the evaluation device may further include a display screen for displaying the result, and the like. However, any auxiliary device that assists in the evaluation can be included in the evaluation device according to the embodiment of the present invention, and the embodiment of the present invention does not limit this.

 An embodiment of the present invention provides a method and a device for evaluating brightness uniformity of a stereoscopic display device, and sequentially acquires brightness values of light at respective test angles when displaying a current viewpoint image on the light exiting side of the stereoscopic display device. And determining a brightness peak value among the acquired brightness values; evaluating the brightness uniformity of the eye-eye stereoscopic display device according to the difference between the ratio of the brightness peaks corresponding to any two adjacent test angles and 1 The closer the ratio between the luminance peaks corresponding to the two test angles is, the more uniform the luminance values of the light rays of the adjacent two viewing zones are, and the less likely the viewer is to cause adverse reactions such as dizziness when viewing the 3D picture. On the contrary, when the ratio between the brightness peaks corresponding to the two adjacent viewing zones deviates from 1, the larger the difference between the brightness values of the light rays in the adjacent two viewing zones, the easier the viewer is when viewing the 3D image. Causes adverse reactions such as dizziness.

 It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

 The present application claims the priority of the Chinese Patent Application No. 2013.

Claims

claims

1. A method for evaluating the brightness uniformity of a three-dimensional display device, including:

The display panel of the three-eye stereoscopic display device is controlled to display N viewpoint images in sequence, wherein the display panel includes a plurality of sub-pixels; when displaying each viewpoint image, each sub-pixel used to display the current viewpoint image displays a white image , each sub-pixel used to display other viewpoint images displays a black image, and the brightness values of the light at the M test angles corresponding to the current viewpoint image are sequentially obtained on the light output side of the three-eye stereoscopic display device;

Determine the brightness peak among all the brightness values obtained; and

The brightness uniformity of the stereoscopic display device is evaluated based on the closeness of the ratio between the brightness peak values corresponding to any two adjacent test angles to 1, where N and M are positive integers not less than 2.

2. The evaluation method according to claim 1, wherein the brightness values of the light at M test angles corresponding to the current viewpoint image are sequentially acquired on the light exit side of the stereoscopic display device, including:

On the light-emitting side of the stereoscopic display device, with the center of the display panel as the center, a set distance as the radius, and on an arc located on the same horizontal plane, obtain each sub-pixel for displaying the current viewpoint image. The brightness value of the emitted light at M test angles.

3. The evaluation method according to claim 2, wherein the set distance is the optimal distance for a viewer to view the image, and the difference between two adjacent test angles is 5. The following radian values.

4. The evaluation method according to claim 2 or 3, wherein the differences between two adjacent test angles are equal or unequal.

5. The evaluation method according to any one of claims 2 to 4, wherein the angle corresponding to the center of the display panel is a radian value of 0°.

6. The evaluation method according to claim 1, wherein determining the brightness peak value among all the acquired brightness values includes:

A brightness curve is established based on the brightness values of light obtained at M test angles when the display panel displays each viewpoint image; the brightness peak value among the brightness values is obtained in the brightness curve.

7. The evaluation method according to claim 1, wherein after evaluating the brightness uniformity of the stereoscopic display device, it further includes: Determine the change in brightness peak value corresponding to any two adjacent test angles.

8. The evaluation method according to claim 7, wherein determining the change amount of the brightness peak corresponding to any two adjacent test angles includes:

Put the ratio Xi between the brightness peaks corresponding to the two adjacent test angles into the formula: S = ]-∑ (^ - I) ² to determine the ratio between the brightness peaks corresponding to the two adjacent test angles. The discrete value of the ratio relative to 1 is 8, where i=l, 2, 3, ... ..., n, n is the number of the ratio of two adjacent brightness peaks.

9. The evaluation method according to claim 2, wherein the horizontal plane refers to a plane at a constant distance from the ground.

10. The evaluation method according to any one of claims 1 to 9, wherein the three-eye stereoscopic display device includes: the display panel and a parallax barrier located on the light emitting side or the light incident side of the display panel.

11. A device for evaluating the brightness uniformity of a three-dimensional display device, including:

A brightness acquisition unit configured to sequentially acquire, on the light output side of the single-eye stereoscopic display device, the corresponding M corresponding to the current viewpoint image when the display panel of the single-eye stereoscopic display device sequentially displays each of the N viewpoint images. The brightness value of light at a test angle; where N and M are positive integers not less than 2;

A brightness peak determination unit, used to determine the brightness peak among all the acquired brightness values; and

The brightness uniformity evaluation unit is used to evaluate the brightness uniformity of the stereoscopic display device based on the closeness of the ratio between the brightness peak values corresponding to any two adjacent test angles to 1.

12. The evaluation device according to claim 11, wherein the brightness acquisition unit is configured to: take the center of the display panel as the center of the circle on the light exit side of the three-eye stereoscopic display device, use the set distance as the radius, and Located on an arc on the same horizontal plane, obtain the brightness values of the light emitted by each sub-pixel used to display the current viewpoint image at M test angles.

13. The device according to claim 11 or 12, wherein the brightness peak determination unit is configured to: establish a brightness curve based on the brightness values of light obtained at M test angles when the display panel displays each viewpoint image. graph, and obtain the brightness peak value among the brightness values in the brightness curve graph.

14. The device according to any one of claims 11 to 13, wherein the brightness uniformity evaluation unit The element is constructed as follows: Determine the change amount of the brightness peak value corresponding to any two adjacent test angles.

15. The device according to any one of claims 11 to 13, wherein the brightness uniformity evaluation unit is configured as: The ratio Xi between the brightness peaks corresponding to the two test angles is brought into the formula: s =, determined The brightness peak value corresponding to the two adjacent test angles

The ratio between is relative to the discrete value S of 1, where i=l, 2, 3, ... ..., n, n is the number of the ratio of two adjacent brightness peaks.

16. The device according to any one of claims 11 to 15, wherein the brightness acquisition unit is signal-connected to the brightness peak determination unit, and the brightness uniformity evaluation unit is connected to the brightness peak determination unit and/or the brightness peak determination unit. Brightness acquisition unit signal connection.

17. The device according to any one of claims 11 to 16, wherein the set distance is the optimal distance for a viewer to view the image, and the difference between two adjacent test angles is 5. The following radians value.

18. The device according to any one of claims 11 to 17, wherein the differences between two adjacent test angles are equal or unequal.