CN112530288A - Optical acquisition device, gamma correction system of display screen and display correction method - Google Patents

Optical acquisition device, gamma correction system of display screen and display correction method Download PDF

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Publication number
CN112530288A
CN112530288A CN202011428894.6A CN202011428894A CN112530288A CN 112530288 A CN112530288 A CN 112530288A CN 202011428894 A CN202011428894 A CN 202011428894A CN 112530288 A CN112530288 A CN 112530288A
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China
Prior art keywords
display
display area
optical
optical probe
light intensity
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CN202011428894.6A
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Chinese (zh)
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叶帅
李军
余志华
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Hubei Changjiang New Display Industry Innovation Center Co Ltd
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Hubei Changjiang New Display Industry Innovation Center Co Ltd
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Priority to CN202011428894.6A priority Critical patent/CN112530288A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

The application discloses gamma correction system and demonstration correction method of optics collection system, display screen, in the optics collection system, it is simultaneously integrated to have the first optical probe that is used for gathering first display area light intensity information and the second optical probe that is used for gathering second display area light intensity information, and two optical probes can be right simultaneously through light screen and support piece the display screen carries out light intensity information and gathers, gathers the hole through first light and second light, can adopt two the same optical probes, need not to adopt the leather sheath in purpose-built aperture, easy operation, and the debug time is short, and measurement accuracy is high, and repeatability is good.

Description

Optical acquisition device, gamma correction system of display screen and display correction method
Technical Field
The application relates to the technical field of image display, in particular to a gamma correction system of an optical acquisition device and a display screen and a display correction method.
Background
In order to meet the use requirements of image acquisition functions of people, an integrated camera is required in the electronic equipment. For a front camera of an electronic device, in order to reduce a frame area and realize a comprehensive screen design, the current mainstream development trend is to set the front camera on the back of a display panel as a camera under a screen. In order to ensure that the under-screen camera can sense ambient light to image through the display panel, a part of display area corresponding to the under-screen camera is different from other parts of display area, so that the display brightness and the color of the two parts of display area are different.
In order to make the display brightness and color of the part of the display area opposite to the sub-screen camera have better consistency with those of the other part of the display area, the optical acquisition device is required to perform light intensity information test on the two parts of the display area, so that the gamma parameters of the two parts of the display area are respectively obtained based on the test result, and the display adjustment is performed on the two parts of the display area.
In the prior art, an optical acquisition device generally performs light intensity information test on two display areas respectively through an optical probe. Because the area of the display area of the part opposite to the camera under the screen is small, when the light intensity information is measured in order to avoid the interference of other areas, the optical probe needs to be provided with a special small-aperture leather sleeve with a small aperture, so that the operation is complex, the debugging time is long, the measurement precision is influenced, and the repeatability is poor.
Disclosure of Invention
In view of this, the present application provides an optical acquisition device, a gamma correction system of a display screen and a display correction method, and the scheme is as follows:
an optical pickup apparatus of a display screen, the display screen including a display panel having a first display area and a second display area at least partially surrounding the first display area, a light transmittance of the first display area being greater than a light transmittance of the second display area, a side of the first display area facing away from a display surface of the display screen having a camera, the optical pickup apparatus comprising:
a shutter plate, the shutter plate comprising: a first surface proximate to the display screen and a second surface facing away from the display screen; a first light collecting hole and a second light collecting hole penetrating the light shielding plate in the thickness direction of the light shielding plate;
a support fixed to the second surface;
a first optical probe and a second optical probe mounted on opposite side surfaces of the support;
when the brightness information of the display screen is collected, the first optical probe faces the first display area, the optical axis of the first optical probe passes through the center of the first light collecting hole and is perpendicular to the display surface, and the lighting end face of the first optical probe is parallel to the second surface; the second optical probe faces the second display area, the optical axis of the second optical probe passes through the center of the second light collecting hole and is perpendicular to the display surface, and the lighting end face of the second optical probe is parallel to the first surface; the vertical projection of the first optical collecting hole on the display surface is positioned in the first display area, and the vertical projection of the second optical collecting hole on the display surface is positioned in the second display area.
It is thus clear that in the optical acquisition device, the integration has the first optical probe that is used for gathering first display area light intensity information and is used for gathering the second optical probe of second display area light intensity information simultaneously, and two optical probes can be right simultaneously through light screen and support piece the display screen carries out light intensity information acquisition, gathers the hole through first light, can adopt two the same optical probes, need not to adopt the leather sheath in purpose-made small aperture, easy operation, and the debugging time is short, and measurement accuracy is high, and repeatability is good.
The present application also provides a gamma correction system of a display screen, the gamma correction system including:
the above optical pickup device;
the system comprises a host, wherein the host is connected with a first optical probe and a second optical probe in an optical acquisition device respectively and is used for acquiring first test light intensity information of a first display area acquired by the first optical probe and second test light intensity information of a second display area acquired by the second optical probe, generating gamma parameters of the first display area based on the first test light intensity information, generating gamma parameters of the second display area based on the second test light intensity information, and storing the gamma parameters of the first display area and the gamma parameters of the second display area in a display driving chip of a display screen.
It is thus clear that gamma correction system adopts above-mentioned optical acquisition device to carry out the light intensity information test to first display area and second display area in the display panel, in the optical acquisition device, it has the first optical probe that is used for gathering first display area light intensity information and is used for gathering the second optical probe of second display area light intensity information to integrate simultaneously, and two optical probes can be right simultaneously through light screen and support piece the display screen carries out light intensity information acquisition, gathers the hole through first light and second light, can adopt two same optical probes, need not to adopt the leather sheath in purpose-built aperture, easy operation, and the debugging time is short, and measurement accuracy is high, and good reproducibility. And because the measurement accuracy of the optical acquisition device is high, the respective gamma parameters of the first display area and the second display area have higher accuracy, so that the brightness and the chromaticity consistency of the sub-pixels in the first display area and the second display area are good under the same gray scale, and the image display quality is improved.
The application also provides a display correction method based on the gamma correction system, and the display correction method comprises the following steps:
adjusting the relative position of the optical acquisition device and the display screen to enable the first surface of the shading plate to face the display screen; in the optical acquisition device, the optical axis of a first optical probe passes through the center of the first light acquisition hole and is perpendicular to the light shielding plate, and the lighting end face of the first optical probe is parallel to the second surface; the optical axis of the second optical probe passes through the center of the second light collecting hole and is vertical to the light shading plate, and the lighting end surface of the second optical probe is parallel to the first surface; the vertical projection of the first optical collecting hole on the display surface is positioned in the first display area, and the vertical projection of the second optical collecting hole on the display surface is positioned in the second display area in the display screen;
fixing the display screen, and enabling the optical acquisition device to vertically move towards the display screen based on the relative position, so that the distance between the first surface and the display surface of the display screen is smaller than a set threshold value;
acquiring first test light intensity information of the first display area through the first optical probe, and acquiring second test light intensity information of the second display area through the second optical probe;
generating gamma parameters of the first display area based on the first test light intensity information, and generating gamma parameters of the second display area based on the second test light intensity information;
and storing the gamma parameter of the first display area and the gamma parameter of the second display area in a display driving chip of a display screen.
Therefore, in the display correction method, the light intensity information of the first display area and the second display area in the display panel is measured through the gamma correction system, and the respective gamma parameters of the first display area and the second display area are obtained based on the measurement result. And the respective gamma parameters of the first display area and the second display area have higher precision, so that the brightness and the chromaticity consistency of the sub-pixels in the first display area and the second display area are good under the same gray scale, and the image display quality is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in related arts, the drawings used in the description of the embodiments or prior arts will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention.
FIG. 1 is a schematic view of a leather sheath structure of a conventional optical acquisition device;
FIG. 2 is a schematic diagram of a display screen;
FIG. 3 is a schematic view of a light shielding plate;
FIG. 4 is a cross-sectional view of the display screen of FIG. 2;
fig. 5 is a schematic structural diagram of an optical pickup apparatus according to an embodiment of the present disclosure;
FIG. 6 is a schematic view of the light shield of the optical acquisition device of FIG. 5;
FIG. 7 is a schematic structural diagram of a gamma correction system of a display panel according to an embodiment of the present disclosure;
fig. 8 is a flowchart of a method of a display correction method according to an embodiment of the present disclosure.
Detailed Description
Embodiments of the present application will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the application are shown, and in which it is to be understood that the embodiments described are merely illustrative of some, but not all, of the embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to ensure that the camera under the screen can sense the ambient light imaging through the display panel, a first display area opposite to the camera under the screen and a second display area outside the first display area have difference, so that the light transmittance of the first display area is greater than that of the second display area.
However, because the arrangement of the sub-pixels in the first display area is different from that in the second display area, the arrangement of the sub-pixels in the first display area is sparse compared with that in the second display area, and the two display areas have obvious optical difference under the same data signal. Therefore, the first display area and the second display area need different gamma parameters for display adjustment, so that the optical difference caused by different sub-pixel arrangement modes of the two display areas in the display process is eliminated.
In order to obtain the gamma parameters of the two display areas, the light intensity information test needs to be carried out on the two display areas. However, the conventional optical probe cannot be used to measure the optical intensity thereof because the area of the first display region is small. In order to solve the problem, a specially-made small-aperture leather sheath needs to be installed on the optical probe.
As shown in fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a leather sheath in a conventional optical collecting device, and fig. 2 is a schematic structural diagram of a display screen. The display screen shown in fig. 2 comprises a display panel 10. In the conventional technology, the optical pickup device generally uses only one optical probe to perform the light intensity information test on the display panel 10 shown in fig. 2. The display panel 10 includes a first display area 1 and a second display area 2, and an off-screen camera may be disposed below the first display area 1. The first display area is set to be a rectangle with adjacent edges respectively being A and B. The optical probe generally needs to be provided with a leather sheath with a conventional aperture (as shown in the right diagram of fig. 1), and the aperture phi0Because the area of the first display area 1 is small, in order to avoid the interference of the emergent light of the second display area 2, when the light intensity information of the first display area 1 is collected, a special small-aperture leather sheath (as shown in the left drawing of fig. 1) is needed, and the aperture phi is phi1。Φ1＜Φ0And phi1＜A，Φ1＜B。
If set to phi0＝10mm，Φ1X is smaller than a and b and smaller than 10 mm. The luminance conversion formula:
L＝Lm*Φ0 2/Φ1 2＝Lm*102/x2 (1)
where Lm is the measured brightness. In order to avoid replacing the leather sheath, the first display area 1 and the second display area 2 can both adopt leather sheaths with small apertures. When the display correction is performed, the optical probe may first perform brightness acquisition on the second display area 2 to obtain the measured brightness of the second display area 2, obtain the actual brightness of the second display area 2 based on the brightness conversion formula, obtain the gamma parameter required by the display of the second display area 2 based on the actual brightness, and write the gamma parameter into the display driving chip. Then, the optical probe is moved to the first display area 1, after alignment debugging, the measured brightness of the first display area 1 is obtained, the actual brightness of the first display area 1 is obtained based on the brightness conversion formula (1), the gamma parameter required by the display of the first display area 1 is obtained based on the actual brightness, and the gamma parameter is written into the display driving chip. When the display panel actually displays, the sub-pixels in the first display area 1 and the sub-pixels in the second display area 2 respectively call the corresponding gamma parameters to display.
The aperture of the special leather sheath is small, so that the alignment precision required by alignment debugging between the special leather sheath and the first display area 1 is high, the operation is complex, the productivity is influenced, and the debugging time is long. And needs to be collected in two times, further increasing the debugging time. And the leather sheath with small aperture influences the light collection quantity of the optical probe, influences the measurement accuracy, has poor repeatability, and influences the measurement effect of the second display area 2.
As shown in FIG. 3, FIG. 3 is a schematic structural diagram of a light shielding plate, wherein the light shielding plate 3 has a rectangular through hole 4 with a side length of c, and c < A and c < B. By using the light shielding plate 3 shown in fig. 3, the same optical probe can be used for testing the light intensity of the first display area 1 and the second display area 2 by using the conventional aperture matching shown in the right diagram of fig. 1. At this time, the luminance conversion formula:
L＝Lm*Φ0 2/c2＝Lm*102/x2＝Lm*102/c2 (2)
when the display correction is carried out, after the display panel is fixedly placed, the light shielding plate 3 is placed on the surface of the display panel, so that the through hole 3 is aligned with the center of the first display area 1, and the light shielding plate 3 completely shields the edge of the first display area 1. The brightness acquisition is firstly carried out on the second display area 2 by utilizing an optical probe with a conventional leather sheath to obtain the measured brightness of the second display area 2, at the moment, the actual brightness of the second display area 2 is equal to the measured brightness of the optical probe, and the gamma parameter required by the display of the second display area 2 is obtained based on the actual brightness and is written into the display driving chip. Then, the optical probe is moved to the first display area 1, and after the optical probe is aligned and debugged with the through hole 4, the measured brightness of the first display area 1 is obtained, the actual brightness of the first display area 1 is obtained based on the brightness conversion formula (2), the gamma parameter required by the display of the first display area 1 is obtained based on the actual brightness, and the gamma parameter is written into the display driving chip. When the display panel actually displays, the sub-pixels in the first display area 1 and the sub-pixels in the second display area 2 respectively call the corresponding gamma parameters to display.
Adopt the light screen shown in fig. 3, although avoided adopting the leather sheath of purpose-built aperture, owing to need fix the light screen on display panel, change display panel at every turn, need counterpoint the debugging again to display panel and light screen 3 to need counterpoint the debugging again of optical probe and light screen, increased the debugging operation flow, influence debugging efficiency, carry out the light intensity test to two display areas respectively through an optical probe simultaneously, test time is long, influences work efficiency.
In order to solve the above problem, the embodiment of the present application provides an optical acquisition device and gamma correction system and display correction method based on the optical acquisition device, the optical acquisition device is integrated with a first optical probe for acquiring light intensity information of a first display area and a second optical probe for acquiring light intensity information of a second display area at the same time, and the two optical probes can be simultaneously right through a light shielding plate and a support piece for acquiring light intensity information of the display screen.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
The embodiment of the application provides an optical acquisition device of a display screen, and the structure of a display panel can be as shown in fig. 2. The display screen comprises a display panel 10 having a first display area 1 and a second display area at least partly surrounding the first display area 1. In the embodiment shown in fig. 2, the second display area 2 partially surrounds the first display area 1, but in other embodiments, the second display area 2 may be arranged to completely surround the first display area 1.
As shown in fig. 4, fig. 4 is a sectional view of the display screen shown in fig. 2, and with reference to fig. 2 and fig. 4, in order to facilitate the camera 3 to collect ambient light through the first display area 1 for imaging, the light transmittance of the first display area 1 is set to be greater than that of the second display area 2, and a camera 3 is disposed on one side of the first display area 1 away from the display surface of the display screen.
The mode of setting the light transmittance of the first display region 1 to be greater than the light transmittance of the second display region 2 includes at least one of the following modes: setting the resolution of the first display area 1 to be smaller than that of the second display area 2, namely setting the number of sub-pixels in the first display area to be smaller than that in the second display area in unit area, wherein the arrangement of the sub-pixels is sparse compared with that in the second display area; thin Film Transistors (TFTs) in the first display area 1 are externally arranged, such as sub-pixel gaps arranged in the second display area 2 or a reserved interval area between the first display area 1 and the second display area; the pixel circuits of the sub-pixels in the first display area 1 are specially designed so as to increase the light transmittance, for example, a pixel circuit which is simpler than that of the second display area 2 may be used because the resolution in the first display area 1 is low.
As shown in fig. 5 and fig. 6, fig. 5 is a schematic structural diagram of an optical pickup apparatus according to an embodiment of the present application, and fig. 6 is a schematic structural diagram of shading in the optical pickup apparatus shown in fig. 5, with reference to fig. 2 and fig. 4, the optical pickup apparatus includes: a light shielding plate 21, the light shielding plate 21 comprising: a first surface 211 adjacent to the display screen 10 and a second surface 212 facing away from the display screen 10; a first light collection hole K1 and a second light collection hole K2 penetrating the light shielding plate 21 in the thickness direction of the light shielding plate 21; a support 22 fixed on said second surface 212; a first optical probe T1 and a second optical probe T2 mounted on opposite side surfaces of the support 22. The thickness direction of the light shielding plate 21 is a direction perpendicular to the first surface 211 and the second surface 212. In fig. 5, two dotted circles are end faces of the two optical probes facing the display surface.
When the brightness information of the display screen 10 is collected, the first optical probe T1 faces the first display area 1, the optical axis thereof passes through the center of the first light collecting hole K1, is perpendicular to the display surface, and the lighting end face thereof is parallel to the second surface 212; the second optical probe T2 faces the second display area 2, the optical axis of the second optical probe passes through the center of the second light collecting hole K2, and is perpendicular to the display surface, and the lighting end face of the second optical probe is parallel to the first surface 211; the vertical projection of the first optical collecting hole K1 on the display surface is located in the first display area 1, and the vertical projection of the second optical collecting hole K2 on the display surface is located in the second display area 2. The center of the light collection hole is the geometric center of the light collection hole, if the light collection hole is circular, the center of the light collection hole is the center of a circle, if the light collection hole is square, the center of the light collection hole is the intersection point of the rectangular diagonal lines, the geometric center is not an absolute geometric center, and certain process and/or alignment errors can exist.
It can be known through the above description that, in the embodiment of this application in the optical acquisition device, the integration has the first optical probe T1 that is used for gathering the light intensity information of first display area 1 and the second optical probe T2 that is used for gathering the light intensity information of second display area 2 simultaneously, and two optical probes can be right simultaneously through light screen 21 and support piece 22 display screen 10 carries out light intensity information and gathers, through first light acquisition hole K1 and second light acquisition hole K2, can adopt two same optical probes, need not to adopt the leather sheath in purpose-built aperture, easy operation, and the debugging time is short, and measurement accuracy is high, and good reproducibility.
The first optical probe T1 and the second optical probe T2 are movably mounted on the support 22. The first optical probe T1 is individually adjustable in position on the support 22, and is movable relative to the support 22 in a first direction parallel to the direction of extension of the support 22, and in a second direction perpendicular to the direction of extension of the support 22. The second optical probe T2 is individually adjustable in position on the support 22, being movable in a first direction relative to the support 22 and in a second direction relative to the support 22. Thus, after the light shielding plate 21 and the display panel 10 are aligned and fixed, the two optical probes can be aligned with the corresponding light collecting holes by adjusting the two optical probes to move relative to the supporting member 22.
As shown in fig. 5, the first optical probe T1 is fixed relative to the support 22 by a first connecting bolt 231, and the first optical probe T1 can be moved in a first direction and/or a second direction relative to the support 22 by adjusting the first connecting bolt 231; the second optical probe T2 is fixed relative to the support member 22 by a second connecting bolt 232, and the second optical probe T2 can be moved in a first direction and/or a second direction relative to the support member 22 by adjusting the second connecting bolt 232. By adjusting the two connecting bolts, the relative positions of the two optical probes relative to the corresponding light collecting holes can be respectively adjusted, and the alignment of the optical probes and the light shielding plate 21 is completed.
The first light collection hole K1 has a similar geometry to the first display area 1, and the size of the first light collection hole K1 is smaller than the size of the first display area 1. Wherein, the similarity of the two geometric figures is equal scaling down or enlarging that one geometric figure is the other geometric figure. Since the first light collection hole K1 is similar to the geometric figure of the first display area 1, and the size of the first light collection hole K1 is smaller than the size of the first display area 1, when the light intensity information of the first display area 1 is collected by the first optical probe T1, the interference of the light of the second display area 2 can be avoided.
Taking the first display area 1 as a rectangle as an example, the corresponding first light collecting hole T1 is a similar rectangle, when performing display correction on the display panel 10, the first light collecting hole K1 is disposed opposite to the first display area, the geometric centers of the first light collecting hole K1 and the first display area are aligned and overlapped in the direction perpendicular to the light shielding plate 21, and the sides of the first light collecting hole T1 are parallel to the sides of the first display area 1 one by one. The vertical projection of the first light collecting hole T1 on the display surface is entirely located within the first display area 1.
Note that the shape of the first light collection hole K1 is set based on the shape of the first display region 1. The shape of the first display region 1 may be a rectangle, the first light collecting hole K1 may be a rectangle similar to the rectangle, the shape of the first display region 1 may be a circle, the first light collecting hole K1 may be a circle similar to the circle, the shape of the first display region 1 may be other geometric figures, such as a trapezoid or a triangle, and the first light collecting hole K1 may be a geometric figure similar to the trapezoid or the triangle.
The first display area 1 is a first rectangle, and the lengths of two adjacent sides of the first rectangle are A and B respectively; the first light collecting hole T1 is a second rectangle, and the lengths of two adjacent sides of the second rectangle are a and b respectively; a/B is A/B, and a < A. In this way, interference of light of the second display area 2 can be avoided.
When the centers of the first rectangle and the second rectangle are opposite and overlapped, and the four sides of the first rectangle and the second rectangle are respectively corresponding and parallel to each other, the distance between the two opposite sides of the first rectangle and the second rectangle is not more than 0.5 mm. That is, the perpendicular projection of the second rectangle on the display panel 10 is completely located within the first rectangle, and the edge of the perpendicular projection is not more than 0.5mm away from the edge of the first rectangle. Therefore, the interference of the second display area 2 on the light intensity test of the first display area 1 is avoided, the first display area 1 is ensured to have a larger test lighting area as much as possible, and the test accuracy is improved.
An end face of the second optical probe T2 facing the display surface is a first circle, and the second light collecting hole K2 is a second circle having a diameter larger than that of the first circle. Like this, when showing the correction, when showing the laminating of light screen 21 on the display surface, can make second optical probe T2 stretch into second light acquisition hole K2 for its terminal surface flushes with first surface 211, carries out the light intensity test to second display area 2 with the nearest distance, improves the accuracy to the light intensity test of second display area 2.
The difference between the diameter of the second circle and the diameter of the first circle is not less than 2mm, so as to avoid that the diameter is too small directly, and the second optical probe T2 is not convenient to extend into the second light collecting hole K2.
The two optical probes are identical, so that the end faces of the two optical probes facing the display panel 10 are circular with the same diameter. When the display calibration is performed, the light shielding plate 21 is attached to the display surface, and the diameter of the end surface of the first optical probe T1 is larger than the length of any one side of the first light collecting hole K1, so that the end surface of the first optical probe T1 is attached to the second surface 212. The end face of the first optical probe T1 is attached to the second surface 212, so that the thickness of the light shielding plate 21 and the first light collecting hole K1 can be utilized, the emergent light of the second display area 2 is prevented from entering the first optical probe T1, and the interference on the light intensity test result of the first display area 1 is avoided.
Based on the foregoing embodiment, another embodiment of the present application further provides a gamma correction system for a display screen, as shown in fig. 7, fig. 7 is a schematic structural diagram of the gamma correction system for a display screen provided in the embodiment of the present application, and with reference to fig. 2 and fig. 6, the gamma correction system includes: the optical pickup device according to the above embodiment; the host 31 is connected with a first optical probe T1 and a second optical probe T2 in the optical acquisition device, and is configured to acquire first test light intensity information of the first display area 1 acquired by the first optical probe T1 and second test light intensity information of the second display area 2 acquired by the second optical probe T2, generate a gamma parameter of the first display area 1 based on the first test light intensity information, generate a gamma parameter of the second display area 2 based on the second test light intensity information, and store the gamma parameter of the first display area 1 and the gamma parameter of the second display area 2 in a display driving chip of a display screen.
The gamma parameters of the two display regions can be calculated respectively based on a conventional gamma parameter calculation method and stored in a display driving chip of the display screen. Currently, a mainstream display driving chip has been developed to call different gamma parameters for display driving based on data signals of different display regions, so as to eliminate display differences of the different display regions under the same gray scale.
In fig. 7, the dashed line indicates a communication connection between the host 31 and the two optical probes, which may be a wired connection or a wireless connection. The gamma correction system also includes a test platform 32 for placing a display screen to be tested. When the display correction is performed, the display screen is horizontally placed on the surface of the testing platform 32, and the display surface of the display panel 10 faces upward.
The test platform 32 further comprises a movable carriage 33, the support 22 being fixed to the movable carriage 33. Can be used for fixing the optical acquisition device. The movable bracket 33 can be adjusted in height in the vertical direction and rotated in the horizontal direction. After the light intensity test of a display screen is completed, only need through this can remove direct 33 vertical removal, remove the display screen that has tested, the new display screen that awaits measuring of awaiting measuring of renewal, can directly carry out the light intensity test to next display screen, need not repeated counterpoint.
The host 31 obtains actual brightness information of the first display area 1 based on the first test light intensity information, obtains actual brightness information of the second display area 2 based on the second test light intensity information, generates gamma parameters of the first display area 1 based on the actual brightness information of the first display area, and generates gamma parameters of the second display area based on the actual brightness information of the second display area 2; the actual brightness information of the first display area 1 is L1，
Figure BDA0002825910830000131
Lm1Is the first test light intensity information.
The first light collecting hole K1 is rectangular, and the lengths of two adjacent sides of the first light collecting hole K1 are a and b respectively; one end of the second optical probe facing the display surface is a cylinder, and d is the diameter of the cylinder; the actual brightness information of the second display area 2 is L2，L2＝Lm2，Lm2The second test light intensity information.
As described above, the shape of the first display region 1 is not limited to a rectangle, and for the first display region 1 having an arbitrary shape, the shape of the first light collecting hole K1 may be set based on the actual geometry of the first display region 1, and the actual luminance calculation formula of the first display region 1 may be modified based on the shape of the first light collecting hole K1.
The gamma correction system adopts the optical acquisition device to carry out light intensity information test on the first display area 1 and the second display area 2 in the display panel 10, in the optical acquisition device, the integration has the first optical probe T1 that is used for gathering the light intensity information of the first display area 1 and the second optical probe T2 that is used for gathering the light intensity information of the second display area 2 simultaneously, and two optical probes can carry out light intensity information collection simultaneously through light screen 21 and support piece 22 the display screen, through first light acquisition hole K1 and second light acquisition hole K2, can adopt two same optical probes, need not to adopt the leather sheath of purpose-made aperture, easy operation, debugging time is short, and measurement accuracy is high, and repeatability is good. And because the measurement accuracy of the optical acquisition device is high, the respective gamma parameters of the first display area 1 and the second display area 2 have higher accuracy, so that the brightness and the chromaticity consistency of the sub-pixels in the first display area 1 and the second display area 2 are good under the same gray scale, and the image display quality is improved.
Based on the foregoing embodiment, another embodiment of the present application further provides a display correction method of a gamma correction system, which can be executed by the gamma correction system, where the display correction method is shown in fig. 8, and fig. 8 is a flowchart of a method of the display correction method provided in the embodiment of the present application, and with reference to fig. 2 and fig. 5 to 7, the method includes:
step S11: the relative position of the optical pickup device and the display screen is adjusted so that the first surface 211 of the light-blocking member 21 faces the display screen.
In the optical acquisition device, the optical axis of the first optical probe T1 passes through the center of the first light acquisition hole K1, is perpendicular to the light shielding plate 21, and the light acquisition end surface of the first optical probe T1 is parallel to the second surface 212, specifically, the light acquisition end surface of the first optical probe T1 is arranged to contact with the second surface 212; the optical axis of the second optical probe T2 passes through the center of the second light collecting hole K2, and is perpendicular to the light shielding plate 21, the light collecting end surface thereof is parallel to the first surface 211, and specifically, the light collecting end surface of the second optical probe T2 is flush with the first surface 211 and is located on the same surface; the vertical projection of the first optical collecting hole K1 on the display surface is positioned in the first display area 1, and the vertical projection of the second optical collecting hole K2 on the display surface is positioned in the second display area 2 in the display screen.
Adopt above-mentioned embodiment optical acquisition device to carry out the light intensity information test to two display areas of display screen, when using this optical acquisition device for the first time, only need once two optical probe and the counterpoint debugging that corresponds light acquisition hole, when accomplishing the test of a display screen after, when changing other display screens and testing, when the better display screen that awaits measuring, need not the repeated counterpoint debugging of light screen 21 and optical probe, improved work efficiency.
Step S12: fixing the display screen, and based on the relative position, vertically moving the optical acquisition device to the display screen, so that the distance between the first surface 211 and the display surface of the display screen is less than a set threshold.
As described above, the display screen 32 may be placed on a test platform 32, and the display screen may be positioned by a fixture on the test platform. The optical acquisition means can be moved by a movable carriage 33. Wherein the set threshold may be no more than a minimum value, preferably 0, i.e. the first surface 211 directly abuts the display surface of the display screen.
Step S13: first test light intensity information of the first display region 1 is acquired through the first optical probe T1, and second test light intensity information of the second display region 2 is acquired through the second optical probe T2.
Step S14: the gamma parameter of the first display region 1 is generated based on the first test light intensity information, and the gamma parameter of the second display region 2 is generated based on the second test light intensity information.
Step S15: and storing the gamma parameter of the first display area 1 and the gamma parameter of the second display area 2 in a display driving chip of a display screen.
Acquiring actual brightness information of the first display area 1 based on the first test light intensity information, acquiring actual brightness information of the second display area 2 based on the second test light intensity information, generating a gamma parameter of the first display area 1 based on the actual brightness information of the first display area 1, and generating a gamma parameter of the second display area based on the actual brightness information of the second display area 2; the actual brightness information of the first display area 1 is L1，
Figure BDA0002825910830000151
Lm1The first test light intensity information; the first light collecting hole T1 is rectangular, and the lengths of two adjacent sides of the first light collecting hole T1 are a and b respectively; the end of the second optical probe T2 facing the display surface is a cylinder, and d is the diameter of the cylinder; the actual brightness information of the second display area 2 is L2，L2＝Lm2，Lm2The second test light intensity information.
In the display correction method, the light intensity information of the first display area 1 and the second display area 2 in the display panel 10 is measured through the gamma correction system, and the respective gamma parameters of the first display area 1 and the second display area 2 are obtained based on the measurement result. And the respective gamma parameters of the first display area 1 and the second display area 2 have higher precision, so that the sub-pixels in the first display area 1 and the second display area 2 have good consistency of brightness and chromaticity under the same gray scale, and the image display quality is improved.
The embodiments in the present description are described in a progressive manner, or in a parallel manner, or in a combination of a progressive manner and a parallel manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments can be referred to each other. The gamma correction system and the display correction method disclosed by the embodiment correspond to the method disclosed by the embodiment, so that the description is relatively simple, and relevant points can be described by referring to the corresponding parts of the optical acquisition device.
It should be noted that in the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only used for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (11)

1. An optical pickup apparatus of a display screen, wherein the display screen comprises a display panel, the display panel has a first display area and a second display area at least partially surrounding the first display area, a light transmittance of the first display area is greater than a light transmittance of the second display area, a camera is provided on a side of the first display area facing away from a display surface of the display screen, and the optical pickup apparatus comprises:
a shutter plate, the shutter plate comprising: a first surface proximate to the display screen and a second surface facing away from the display screen; a first light collecting hole and a second light collecting hole penetrating the light shielding plate in the thickness direction of the light shielding plate;
a support fixed to the second surface;
a first optical probe and a second optical probe mounted on opposite side surfaces of the support;
when the brightness information of the display screen is collected, the first optical probe faces the first display area, the optical axis of the first optical probe passes through the center of the first light collecting hole and is perpendicular to the display surface, and the lighting end face of the first optical probe is parallel to the second surface; the second optical probe faces the second display area, the optical axis of the second optical probe passes through the center of the second light collecting hole and is perpendicular to the display surface, and the lighting end face of the second optical probe is parallel to the first surface; the vertical projection of the first optical collecting hole on the display surface is positioned in the first display area, and the vertical projection of the second optical collecting hole on the display surface is positioned in the second display area.
2. An optical acquisition device according to claim 1, wherein the first and second optical probes are movably mounted on the support;
the first optical probe is fixed relative to the support through a first connecting bolt;
the second optical probe is fixed relative to the support through a second connecting bolt.
3. The optical collection device of claim 1, wherein the first light collection aperture has a geometry similar to the first display area and a size smaller than the first display area.
4. The optical pickup device as claimed in claim 3, wherein the first display area is a first rectangle, and the lengths of two adjacent sides of the first rectangle are A and B;
the first light collecting hole is a second rectangle, and the lengths of two adjacent sides of the second rectangle are a and b respectively; a/B is A/B, and a < A.
5. The optical pickup device according to claim 4, wherein when the centers of the first rectangle and the second rectangle are in direct coincidence and the four sides of the first rectangle and the second rectangle are respectively corresponding and parallel to each other, the distance between the two opposite sides of the first rectangle and the second rectangle is not more than 0.5 mm.
6. The optical collection device of claim 1, wherein an end surface of the second optical probe facing the display surface has a first circular shape, and the second light collection hole has a second circular shape having a diameter larger than a diameter of the first circular shape.
7. The optical pickup device as claimed in claim 6, wherein the diameter of the second circle differs from the diameter of the first circle by not less than 2 mm.
8. A gamma correction system for a display screen, the gamma correction system comprising:
an optical pickup apparatus according to any one of claims 1 to 7;
the system comprises a host, wherein the host is connected with a first optical probe and a second optical probe in an optical acquisition device respectively and is used for acquiring first test light intensity information of a first display area acquired by the first optical probe and second test light intensity information of a second display area acquired by the second optical probe, generating gamma parameters of the first display area based on the first test light intensity information, generating gamma parameters of the second display area based on the second test light intensity information, and storing the gamma parameters of the first display area and the gamma parameters of the second display area in a display driving chip of a display screen.
9. The gamma correction system of claim 8, wherein the host computer obtains actual brightness information of the first display area based on the first test light intensity information, obtains actual brightness information of the second display area based on the second test light intensity information, generates gamma parameters of the first display area based on the actual brightness information of the first display area, and generates gamma parameters of the second display area based on the actual brightness information of the second display area;
the actual brightness information of the first display area is L1，
Figure FDA0002825910820000031
Lm1The first test light intensity information; the first light collecting hole is rectangular, and the lengths of two adjacent sides of the first light collecting hole are a and b respectively; one end of the second optical probe facing the display surface is a cylinder, and d is the diameter of the cylinder;
the actual brightness information of the second display area is L2，L2＝Lm2，Lm2The second test light intensity information.
10. A display correction method based on the gamma correction system of claim 8 or 9, wherein the display correction method comprises:
adjusting the relative position of the optical acquisition device and the display screen to enable the first surface of the shading plate to face the display screen; in the optical acquisition device, the optical axis of a first optical probe passes through the center of the first light acquisition hole and is perpendicular to the light shielding plate, and the lighting end face of the first optical probe is parallel to the second surface; the optical axis of the second optical probe passes through the center of the second light collecting hole and is vertical to the light shading plate, and the lighting end surface of the second optical probe is parallel to the first surface; the vertical projection of the first optical collecting hole on the display surface is positioned in the first display area, and the vertical projection of the second optical collecting hole on the display surface is positioned in the second display area in the display screen;
fixing the display screen, and enabling the optical acquisition device to vertically move towards the display screen based on the relative position, so that the distance between the first surface and the display surface of the display screen is smaller than a set threshold value;
acquiring first test light intensity information of the first display area through the first optical probe, and acquiring second test light intensity information of the second display area through the second optical probe;
generating gamma parameters of the first display area based on the first test light intensity information, and generating gamma parameters of the second display area based on the second test light intensity information;
and storing the gamma parameter of the first display area and the gamma parameter of the second display area in a display driving chip of a display screen.
11. The display correction method according to claim 10, wherein actual luminance information of the first display region is obtained based on the first test light intensity information, actual luminance information of the second display region is obtained based on the second test light intensity information, a gamma parameter of the first display region is generated based on the actual luminance information of the first display region, and a gamma parameter of the second display region is generated based on the actual luminance information of the second display region;
the actual brightness information of the first display area is L1，
Figure FDA0002825910820000041
Lm1The first test light intensity information; the first light collecting hole is rectangular, and the lengths of two adjacent sides of the first light collecting hole are a and b respectively; one end of the second optical probe facing the display surface is a cylinder, and d is the diameter of the cylinder;
the actual brightness information of the second display area is L2，L2＝Lm2，Lm2The second test light intensity information.
CN202011428894.6A 2020-12-09 2020-12-09 Optical acquisition device, gamma correction system of display screen and display correction method Pending CN112530288A (en)

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