CN109817179B - Liquid crystal display panel brightness adjusting method and system and 3D printing device - Google Patents
Liquid crystal display panel brightness adjusting method and system and 3D printing device Download PDFInfo
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- CN109817179B CN109817179B CN201910237156.4A CN201910237156A CN109817179B CN 109817179 B CN109817179 B CN 109817179B CN 201910237156 A CN201910237156 A CN 201910237156A CN 109817179 B CN109817179 B CN 109817179B
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Abstract
The invention discloses a brightness adjusting method, a brightness adjusting system and a 3D printing device of a liquid crystal display panel, wherein the brightness adjusting method comprises the steps of obtaining a first gray-scale value of a target gamma curve corresponding to each pixel in an image to be lightened, determining a second gray-scale value corresponding to each pixel of the liquid crystal display panel according to the first gray-scale value and a pre-established corresponding relation between the first gray-scale value and the second gray-scale value, and driving each pixel in the liquid crystal display panel to be lightened according to the second gray-scale value, so that the display effect of the target gamma curve is achieved by utilizing a solidified preset gamma curve in the liquid crystal display panel, and the utilization rate of gray scales is improved during 3D printing.
Description
Technical Field
The invention relates to the technical field of display, in particular to a method and a system for adjusting the brightness of a liquid crystal display panel and a 3D printing device.
Background
3D prints and is novel rapid prototyping manufacturing technology, and it makes the product through multilayer stack growth principle, can overcome the special construction obstacle that traditional machining can't realize, can realize the simplification production of arbitrary complex structure part. Currently, the 3D printing technology is broadly classified into the following technologies: the optical curing type, fused deposition molding, layered object manufacturing, selective laser sintering, selective laser melting and the like, and the optical curing type 3D printing technology has the advantages of high resolution, smooth molding surface, high dimensional precision and the like, so that the optical curing type 3D printing technology is widely applied to production technology.
For the photocuring molding 3D printing technology, the implementation process is as follows: by using the principle of liquid crystal screen imaging, under the drive of microcomputer and display screen drive circuit, the image signal is provided by computer program, and the liquid resin in the printing tank is solidified by ultraviolet light to form a thin layer of the model to be printed. However, the gamma curve adopted by the liquid crystal display screen in the related art is the gamma curve for display, human eyes are most sensitive to the identification of the gamma curve, and the perception of the resin to the brightness is not matched with the perception of the human eyes to the brightness in the 3D printing process, so that the gamma curve for 3D printing is different from the gamma curve for display, and if the gamma curve is still used for driving the liquid crystal display panel to cure the resin, the utilization rate of gray scale is not high. But a driving chip for 3D printing is not available in the related art. In addition, it is also difficult in the prior art to obtain a gamma curve for 3D printing by adjusting the gamma curve for display (external resistor string adjustment and internal code adjustment). Specifically, for an external resistor string adjusting mode, a resistor string voltage dividing mode and the internal resistance of a driving chip (IC) are difficult to meet the gamma curve of 3D printing, and the gamma curve transition problem among adjustable points exists; for built-in code debugging, although each node is adjustable independently, the adjustable voltage range of each node is different, some nodes are small in range, some nodes are large in range, and the voltage of some nodes is limited and cannot be adjusted to a gamma curve of 3D printing.
Therefore, how to improve the gray scale utilization rate of the liquid crystal display panel in the 3D printing process by using the driving chip in the related art is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a brightness adjusting method and system for a liquid crystal display panel and a 3D printing device, which are used for solving the problem that the gray scale utilization rate is not high when the liquid crystal display panel is used for 3D printing in the related art.
In a first aspect, an embodiment of the present invention provides a method for adjusting brightness of a liquid crystal display panel, including:
the method comprises the steps of firstly, acquiring an image to be lightened, and determining a first gray-scale value of a target gamma curve corresponding to each pixel in the image to be lightened;
determining a second gray scale value corresponding to each pixel of the liquid crystal display panel according to the first gray scale value and a pre-established corresponding relation between the first gray scale value and the second gray scale value, wherein the difference value between the brightness value corresponding to the first gray scale value in a target gamma curve and the brightness value corresponding to the second gray scale value in a preset gamma curve is smaller than a preset threshold value;
and driving each pixel in the liquid crystal display panel to light according to the second gray scale value.
In a second aspect, an embodiment of the present invention provides a brightness adjustment system, including: an upper computer and a liquid crystal display panel;
the host computer includes: the device comprises a first gray value determining module, a second gray value determining module and a data sending module;
the first gray-scale value determining module is used for acquiring an image to be lightened and determining a first gray-scale value of a target gamma curve corresponding to each pixel in the image to be lightened;
the second gray scale value determining module is configured to determine a second gray scale value corresponding to each pixel of the liquid crystal display panel according to the first gray scale value and a pre-established correspondence between the first gray scale value and the second gray scale value, where a difference between a brightness value corresponding to the first gray scale value in a target gamma curve and a brightness value corresponding to the second gray scale value in a preset gamma curve is smaller than a preset threshold;
the data sending module is used for providing the second gray scale value for the liquid crystal display panel;
the liquid crystal display panel is used for driving the pixels to light according to the second gray-scale value.
In a third aspect, an embodiment of the present invention provides a brightness adjustment system, including: a liquid crystal display panel, the liquid crystal display panel comprising: the device comprises a selection module, a first storage module and a second storage module;
the first storage module is used for storing the corresponding relation between a first gray-scale value in a target gamma curve and a second gray-scale value in a preset gamma curve and the gray-scale voltage corresponding to the second gray-scale value;
the second storage module is used for storing the corresponding relation between the second gray scale value and the brightness value in the preset gamma curve and the gray scale voltage corresponding to the second gray scale value;
the selection module is used for selectively calling the data in the first storage module or the second storage module to drive each pixel to be lightened according to the display mode of the liquid crystal display panel.
In a fourth aspect, an embodiment of the present invention provides a 3D printing apparatus, including: a printing slot, a light source, and a brightness adjustment system as described in the second aspect, or a brightness adjustment system as described in the third aspect.
The invention has the following beneficial effects:
according to the brightness adjusting method, the brightness adjusting system and the 3D printing device of the liquid crystal display panel, the first gray-scale value of the target gamma curve corresponding to each pixel in the image to be lightened is obtained, the second gray-scale value corresponding to each pixel of the liquid crystal display panel is determined according to the first gray-scale value and the pre-established corresponding relation between the first gray-scale value and the second gray-scale value, and each pixel in the liquid crystal display panel is driven to be lightened according to the second gray-scale value, so that the display effect of the target gamma curve is achieved by utilizing the solidified preset gamma curve in the liquid crystal display panel, and the utilization rate of gray scales is improved during 3D printing.
Drawings
Fig. 1 is a flowchart of a method for adjusting brightness of a liquid crystal display panel according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a preset gamma curve and a target gamma curve according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a brightness adjustment system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another brightness adjustment system according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a 3D printing apparatus according to an embodiment of the present invention.
Detailed Description
In the related art, for the photocuring molding 3D printing technology, the implementation process is as follows: by using the imaging principle of the liquid crystal display panel, under the drive of a microcomputer and a drive circuit of the display panel, an image signal is provided by a computer program, and a selective transparent area appears on the liquid crystal display panel. Then, under the irradiation of the ultraviolet light source, the ultraviolet light in the image transparent area of the liquid crystal display panel is blocked, the ultraviolet light in the non-transparent area is blocked, and the ultraviolet light penetrating through the liquid crystal display panel forms an ultraviolet light image area. A printing groove for containing solidified liquid resin is arranged on the surface of the liquid crystal display panel, the bottom of the printing groove is a transparent film, and the non-transparent area of the liquid crystal display panel is not irradiated by ultraviolet rays, so that the liquid light-solidified resin of the part is not irradiated by the ultraviolet rays and still keeps liquid; and at the position corresponding to the selective transparent area, ultraviolet rays irradiate the liquid light-cured resin through the transparent film, so that the liquid resin irradiated by the ultraviolet rays is subjected to curing reaction, the irradiated liquid resin becomes a solid state, a thin layer of a model to be printed is formed, and the printing process is repeated for multiple times, so that the simplified production of any complex structural component can be realized.
In the related technology, the liquid crystal display panel is adopted to cure the liquid resin in the printing tank, and still a gamma curve for display is used, the set value of the gamma curve is generally 2.2 +/-0.3, the set value of the gamma curve in the interval can enable human eyes to perceive that the brightness of the panel linearly changes along with gray scale, the capacity of distinguishing the gray scale is increased, and the readability of the gray scale of the panel is enhanced, namely the set value of the gamma curve in the interval is the set value sensitive to the human eyes. However, the perception of the resin to ultraviolet light is not matched with the perception of human eyes to light, and researches show that the matching between the transmittance of the ultraviolet light and the curing rate of the resin is linearly related, and if the liquid resin is cured by adopting a gamma curve for display, the liquid resin has the problems of insensitivity in low gray scale and over-sensitivity in high gray scale. However, in the related art, the gamma curve for 3D printing is not fixed in the driver chip, and the gamma curve for 3D printing cannot be obtained by debugging the gamma curve for display fixed in the driver chip (external resistor string debugging and internal code debugging).
In view of the above problems in the related art, embodiments of the present invention provide a method and system for adjusting brightness of a liquid crystal display panel, and a 3D printing apparatus. In order to make the objects, technical solutions and advantages of the present invention clearer, specific embodiments of a method for adjusting brightness of a liquid crystal display panel, a brightness adjusting system and a 3D printing apparatus according to an embodiment of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only for illustrating and explaining the present invention and are not to be used for limiting the present invention. And the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The shapes and sizes of the various elements in the drawings are not to scale and are merely intended to illustrate the invention.
The embodiment of the invention provides a method for adjusting the brightness of a liquid crystal display panel, which comprises the following steps of:
s101, acquiring an image to be lightened, and determining a first gray-scale value of a target gamma curve corresponding to each pixel in the image to be lightened;
the target gamma curve is a gamma curve matched with liquid resin to be cured, the target gamma region is obtained through theoretical calculation, and cannot be obtained through adjustment of a gamma circuit in a driving circuit in the liquid crystal display panel, namely, the corresponding relation of the target gamma curve cannot be obtained through debugging of the gamma circuit.
S102, determining a second gray scale value corresponding to each pixel of the liquid crystal display panel according to the first gray scale value and a pre-established corresponding relation between the first gray scale value and the second gray scale value, wherein the difference value between the brightness value corresponding to the first gray scale value in the target gamma curve and the brightness value corresponding to the second gray scale value in the preset gamma curve is smaller than a preset threshold value;
because the difference between the brightness value corresponding to the first gray scale value in the target gamma curve and the brightness value corresponding to the second gray scale value in the preset gamma curve is smaller than the preset threshold, when the difference between the brightness value corresponding to the first gray scale value and the brightness value corresponding to the second gray scale value is not considered, the brightness values corresponding to the first gray scale value and the second gray scale value can be considered to be the same, so that the corresponding relationship between the first gray scale value and the second gray scale value can be established through the brightness values.
And S103, driving each pixel in the liquid crystal display panel to light according to the second gray-scale value.
Specifically, in the method for adjusting the brightness of the liquid crystal display panel provided in the embodiment of the present invention, the first gray-scale value of the target gamma curve corresponding to each pixel in the image to be lit is obtained, the second gray-scale value corresponding to each pixel in the liquid crystal display panel is determined according to the first gray-scale value and the pre-established correspondence between the first gray-scale value and the second gray-scale value, and then each pixel in the liquid crystal display panel is driven to be lit according to the second gray-scale value, so that the display effect of the target gamma curve is achieved by using the cured preset gamma curve in the liquid crystal display panel, and the utilization rate of the gray scale is improved when performing 3D printing.
In the method for adjusting the brightness of the liquid crystal display panel provided by the embodiment of the invention, the display effect of the gamma curve for 3D printing is achieved by adopting the gamma curve for display, so that the utilization rate of gray scales in the 3D printing process can be improved, and the liquid crystal display panel can be conveniently detected when a printing defect occurs in the 3D printing process, and the method specifically comprises the following steps: in the 3D printing process, a printing defect occurs, in order to judge whether the printing defect is caused by the problem of the liquid crystal panel, the liquid crystal panel is taken down, a visible light source is used as an external backlight to detect whether the display of the liquid crystal panel has the problem, and because human eyes are adopted for identification in the detection process, a gamma curve for display sensitive to the human eyes is required to be adopted to drive the liquid crystal panel.
Optionally, in the method for adjusting brightness of a liquid crystal display panel provided in the embodiment of the present invention, step S102 specifically includes:
determining a brightness value corresponding to the first gray scale value according to a preset target gamma curve;
determining a second gray scale value corresponding to the brightness value according to the brightness value and a preset gamma curve;
the preset gamma curve is a corresponding relation between a brightness value solidified in the liquid crystal display panel and the second gray scale value, and the target gamma curve is a corresponding relation between a brightness value obtained through theoretical calculation and the first gray scale value.
The process of converting the first gray scale value into the second gray scale value is described below by taking the target gamma curve as gamma (1) and the preset gamma curve and gamma (2.2) as examples. Wherein, the first table is a corresponding relation table of brightness values and gray scale values in the target gamma curve and the preset gamma curve, wherein, Grey Level represents the gray scale value, T% (2.2) represents the brightness value corresponding to each gray scale in gamma (2.2), and T% (1) represents the brightness value corresponding to each gray scale in gamma (1).
As shown in fig. 2 and table one, if the obtained first gray scale value is 112, the brightness value corresponding to the first gray scale value 112 is determined to be 0.44 according to the first gray scale value 112 and the target gamma curve gamma (1), and then the second gray scale value is determined to be 176 according to the brightness value 0.44 and the preset gamma curve gamma (2.2).
Watch 1
| Grey Level | T％(2.2) | T％(1) |
| 0 | 0.00 | 0.00 |
| 16 | 0.00 | 0.06 |
| 32 | 0.01 | 0.13 |
| 48 | 0.03 | 0.19 |
| 64 | 0.05 | 0.25 |
| 80 | 0.08 | 0.31 |
| 96 | 0.12 | 0.38 |
| 112 | 0.16 | 0.44 |
| 128 | 0.22 | 0.50 |
| 144 | 0.28 | 0.56 |
| 160 | 0.36 | 0.63 |
| 176 | 0.44 | 0.69 |
| 192 | 0.53 | 0.75 |
| 208 | 0.63 | 0.81 |
| 224 | 0.75 | 0.88 |
| 240 | 0.87 | 0.94 |
| 256 | 1.00 | 1.00 |
Optionally, in the method for adjusting brightness of a liquid crystal display panel according to an embodiment of the present invention, as shown in fig. 2, the target gamma curve is a linear function determined according to two end points of the preset gamma curve.
Specifically, in the method for adjusting the brightness of the liquid crystal display panel provided by the embodiment of the invention, since the transmittance of ultraviolet light is linearly related to the curing rate of the resin, that is, the target gamma curve gamma (1) can meet the requirement of curing the resin, the problem that the preset gamma curve gamma (2.2) is not sensitive at a low gray scale and is too sensitive at a high gray scale when the resin is cured can be avoided. The present invention utilizes the preset gamma curve solidified in the existing liquid crystal display panel to achieve the display effect of the target gamma curve, so the end point of the target gamma curve needs to be set by taking the preset gamma curve as the reference.
Optionally, in the method for adjusting brightness of a liquid crystal display panel provided in the embodiment of the present invention, the preset threshold is less than 10%.
Specifically, in the method for adjusting brightness of a liquid crystal display panel according to an embodiment of the present invention, since the preset gamma curve is already cured in the existing liquid crystal display panel to achieve the display effect of the target gamma curve, the brightness value corresponding to the acquired first gray scale value in the target gamma curve may not necessarily be adjusted by the gamma circuit already cured in the liquid crystal display panel, so that the closest gray scale corresponding to the brightness value may be selected as the second gray scale value, where it is required that a difference between the brightness value corresponding to the second gray scale value and the brightness value corresponding to the first gray scale value is smaller than 10%, so as to ensure that accurate brightness can be emitted.
Optionally, in the method for adjusting luminance of a liquid crystal display panel provided in the embodiment of the present invention, the method further includes:
judging whether the liquid crystal display panel is used for 3D printing or not;
when it is determined that the liquid crystal display panel is used for 3D printing, steps S101 to S103 in the above embodiment are performed;
when the liquid crystal display panel is determined to be used for displaying, directly determining a second gray-scale value corresponding to each pixel of an image to be lightened according to a preset gamma curve solidified in the liquid crystal display panel, and driving each pixel of the liquid crystal display panel to be lightened according to the second gray-scale value.
Specifically, in the method for adjusting the brightness of the liquid crystal display panel provided by the embodiment of the invention, the same driving chip can be used for controlling the liquid crystal display panel to be used for 3D printing or controlling the liquid crystal display panel to perform normal display. When the driving chip is used for controlling the liquid crystal display panel to perform 3D printing, the driving chip takes the obtained gray scale value of the image to be lightened as a first gray scale value, and converts the first gray scale value from the step S101 to the step S103 in the above embodiment into a second gray scale value to be provided to the liquid crystal display panel, so that the liquid crystal display panel displays the image for 3D printing; when the driving chip is used for controlling the liquid crystal display panel to normally display, the acquired gray scale value of the image to be lightened is used as a second gray scale value, the second gray scale value is directly provided for the liquid crystal display panel, and the liquid crystal display panel displays a normal image sensitive to human eyes according to the second gray scale value.
In addition to the above, before performing 3D printing, the liquid crystal panel may be driven by using a gamma curve for display, that is, the obtained gray value of the image to be lit is used as a second gray value, and the second gray value is directly provided to the liquid crystal display panel, and the liquid crystal display panel displays a normal image sensitive to human eyes according to the second gray value, so that whether the liquid crystal panel is normally displayed can be visually judged by human eyes, if the liquid crystal panel is normal, the steps S101 to S103 in the above embodiment may be performed to perform 3D printing, and if the liquid crystal panel is abnormally displayed, the liquid crystal panel needs to be debugged or maintained and then used for 3D printing, so as to avoid a printing defect when the liquid crystal panel is directly used for 3D printing.
Based on the same inventive concept, an embodiment of the present invention further provides a brightness adjustment system, as shown in fig. 3, the brightness adjustment system includes: an upper computer 1 and a liquid crystal display panel 2;
the upper computer 1 includes: the device comprises a first gray-scale value determining module 11, a second gray-scale value determining module 12 and a data sending module 13;
the first gray scale value determining module 11 is configured to obtain a first gray scale value of a target gamma curve corresponding to each pixel in an image to be lighted, which is determined by the image to be lighted;
a second gray scale value determining module 12, configured to determine a second gray scale value corresponding to each pixel of the liquid crystal display panel according to the first gray scale value and a pre-established correspondence between the first gray scale value and the second gray scale value, where a difference between a brightness value corresponding to the first gray scale value in the target gamma curve and a brightness value corresponding to the second gray scale value in the preset gamma curve is smaller than a preset threshold;
a data transmitting module 13 for providing the second gray scale value to the liquid crystal display panel;
the liquid crystal display panel 2 is used for driving each pixel to light according to the second gray-scale value.
Specifically, in the brightness adjustment system provided in the embodiment of the present invention, the brightness adjustment system includes an upper computer, the upper computer determines a first gray-scale value of a target gamma curve corresponding to an image to be lit through a first gray-scale value determining module, converts the first gray-scale value into a second gray-scale value through a second gray-scale value determining module, and provides the second gray-scale value to the liquid crystal display panel through a data sending module, so that the liquid crystal display panel displays a corresponding image according to the second gray-scale value. The host computer may be an independently provided data processor, data processing device, or data processing chip, and is not particularly limited herein.
Optionally, in the brightness adjustment system provided in the embodiment of the present invention, the second gray-scale value determining module is specifically configured to:
determining a brightness value corresponding to the first gray scale value according to a preset target gamma curve;
determining a second gray scale value corresponding to the brightness value according to the brightness value and a preset gamma curve;
the preset gamma curve is a corresponding relation between a brightness value solidified in the liquid crystal display panel and the second gray scale value, and the target gamma curve is a corresponding relation between a brightness value obtained through theoretical calculation and the first gray scale value.
Optionally, in the brightness adjustment system provided by the embodiment of the present invention, the target gamma curve is a linear function determined according to two endpoint values of the preset gamma curve.
The steps executed by each module included in the upper computer have already been described in detail in the method for adjusting the brightness of the liquid crystal display panel, and may be implemented by referring to the method for adjusting the brightness of the liquid crystal display panel, which is not described herein again.
Based on the same inventive concept, an embodiment of the present invention provides a brightness adjustment system, as shown in fig. 4, including: a liquid crystal display panel 2, the liquid crystal display panel 2 comprising: a selection module 21, a first storage module 22 and a second storage module 23;
the first storage module 22 is configured to store a corresponding relationship between a first gray-scale value in the target gamma curve and a second gray-scale value in the preset gamma curve, and a gray-scale voltage corresponding to the second gray-scale value;
the second storage module 23 is configured to store a corresponding relationship between a second gray scale value and a brightness value in a preset gamma curve, and a gray scale voltage corresponding to the second gray scale value;
the selection module 21 is used for selectively calling the data in the first storage module 22 or the second storage module 23 to drive each pixel to light up according to the display mode of the liquid crystal display panel.
Specifically, in the brightness adjustment system provided by the embodiment of the present invention, the liquid crystal display panel includes a selection module, and the selection module selectively calls data in the first storage module or the second storage module according to the display mode determined by the liquid crystal display panel to drive each pixel to light up. If the liquid crystal display panel is in a 3D printing mode, the selection module calls data in the first storage module to drive each pixel to be lightened so as to finish the solidification of liquid resin; when the liquid crystal display surface is in a normal display mode, the selection module calls the data in the second storage module to drive each pixel to be lightened, and the picture for human eyes to recognize is displayed.
Optionally, in the brightness adjustment system provided in the embodiment of the present invention, the selection module is specifically configured to:
judging whether the liquid crystal display panel is used for 3D printing or not;
when the liquid crystal display panel is determined to be used for 3D printing, calling data in the first storage module to drive each pixel to be lightened;
and when the liquid crystal display panel is determined to be used for displaying, calling the data in the second storage module to drive each pixel to light.
It should be noted that, the calling process of the selection module to the data in the first storage module or the second storage module is the same as the principle of the method for adjusting the brightness of the liquid crystal display panel provided in the foregoing embodiment, and may be implemented by referring to the foregoing embodiment, and details are not described here.
Based on the same inventive concept, an embodiment of the present invention provides a 3D printing apparatus, as shown in fig. 5, including: a printing slot 4, a light source 3, and a brightness adjustment system as shown in fig. 3, or a brightness adjustment system as shown in fig. 4.
Wherein, when the 3D printing apparatus includes the brightness adjusting system as shown in fig. 3, the light source may be configured to emit ultraviolet light to cure the liquid resin; when the 3D printing apparatus includes the brightness adjustment system as shown in fig. 4, the light source may be used to emit white light; of course, the light source may also be a light source capable of providing light of different colors according to different brightness adjustment systems or different display modes, and is not limited in particular.
Fig. 5 is a schematic structural diagram of a 3D device according to an embodiment of the present invention, which performs printing by using the light source 3 emitting a near-ultraviolet short-wave band and the liquid crystal display panel 1 as a light source of the 3D printing device. When the liquid crystal display panel 1 is used as a 3D printing light valve, the 3D printing principle is that the liquid crystal display panel 1 utilizes the light source 3 to emit backlight to display a graph of a certain section of an object to be printed and emit a near ultraviolet short wave band at the same time, the display area of the liquid crystal display panel 1 corresponding to the graph is provided with the near ultraviolet short wave band to emit, the display area without the graph does not have the near ultraviolet short wave band to emit, a photosensitive resin material is placed in the printing groove 4, the photosensitive resin material is cured and formed after being irradiated by light corresponding to the graph, and the cured photosensitive resin material is fixed on the forming device supporting plate 5. And after the graph of one section is solidified, moving the forming device supporting plate 5, switching the graph of the next section by the liquid crystal display panel 1 to display, repeating the operation to solidify the graph of the other section, and continuously repeating the operation to finish the whole 3D printing process.
According to the brightness adjusting method, the brightness adjusting system and the 3D printing device of the liquid crystal display panel, the first gray-scale value of the target gamma curve corresponding to each pixel in the image to be lightened is obtained, the second gray-scale value corresponding to each pixel of the liquid crystal display panel is determined according to the first gray-scale value and the pre-established corresponding relation between the first gray-scale value and the second gray-scale value, and each pixel in the liquid crystal display panel is driven to be lightened according to the second gray-scale value, so that the display effect of the target gamma curve is achieved by utilizing the solidified preset gamma curve in the liquid crystal display panel, and the utilization rate of gray scales is improved during 3D printing.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A method for adjusting the brightness of a liquid crystal display panel is characterized by comprising the following steps:
the method comprises the steps of firstly, acquiring an image to be lightened, and determining a first gray-scale value of a target gamma curve corresponding to each pixel in the image to be lightened;
determining a second gray scale value corresponding to each pixel of the liquid crystal display panel according to the first gray scale value and a pre-established corresponding relation between the first gray scale value and the second gray scale value, wherein the difference value between the brightness value corresponding to the first gray scale value in a target gamma curve and the brightness value corresponding to the second gray scale value in a preset gamma curve is smaller than a preset threshold value;
driving each pixel in the liquid crystal display panel to light according to the second gray scale value;
wherein the method further comprises:
judging whether the liquid crystal display panel is used for 3D printing or not;
when the liquid crystal display panel is determined to be used for 3D printing, executing the first step to the third step;
when the liquid crystal display panel is determined to be used for displaying, directly determining a second gray-scale value corresponding to each pixel of an image to be lightened according to the preset gamma curve solidified in the liquid crystal display panel, and driving each pixel of the liquid crystal display panel to be lightened according to the second gray-scale value.
2. The method for adjusting brightness of an lcd panel according to claim 1, wherein determining the second gray-scale value corresponding to each pixel of the lcd panel according to the first gray-scale value and a pre-established correspondence between the first gray-scale value and the second gray-scale value comprises:
determining the brightness value corresponding to the first gray scale value according to a preset target gamma curve;
determining the second gray scale value corresponding to the brightness value according to the brightness value and the preset gamma curve;
the preset gamma curve is a corresponding relation between a brightness value solidified in the liquid crystal display panel and the second gray scale value, and the target gamma curve is a corresponding relation between a brightness value obtained through theoretical calculation and the first gray scale value.
3. The method of adjusting brightness of a liquid crystal display panel according to claim 2, wherein the target gamma curve is a linear function determined according to both end points of the preset gamma curve.
4. The method for adjusting the brightness of a liquid crystal display panel according to claim 1, wherein the predetermined threshold is less than 10%.
5. A brightness adjustment system, comprising: an upper computer and a liquid crystal display panel;
the host computer includes: the device comprises a first gray value determining module, a second gray value determining module and a data sending module;
the first gray-scale value determining module is used for acquiring an image to be lightened and determining a first gray-scale value of a target gamma curve corresponding to each pixel in the image to be lightened;
the second gray scale value determining module is configured to determine a second gray scale value corresponding to each pixel of the liquid crystal display panel according to the first gray scale value and a pre-established correspondence between the first gray scale value and the second gray scale value, where a difference between a brightness value corresponding to the first gray scale value in a target gamma curve and a brightness value corresponding to the second gray scale value in a preset gamma curve is smaller than a preset threshold;
the data sending module is used for providing the second gray scale value for the liquid crystal display panel;
the liquid crystal display panel is used for driving each pixel to be lightened according to the second gray scale value;
when the liquid crystal display panel is used for 3D printing, a first gray-scale value determining module, a second gray-scale value determining module and a data sending module in the upper computer are matched;
when the liquid crystal display panel is used for displaying, the liquid crystal display panel is specifically used for: and directly determining a second gray-scale value corresponding to each pixel of the image to be lightened according to the preset gamma curve solidified in the liquid crystal display panel, and driving each pixel of the liquid crystal display panel to be lightened according to the second gray-scale value.
6. The system of claim 5, wherein the second gray level value determining module is specifically configured to:
determining the brightness value corresponding to the first gray scale value according to a preset target gamma curve;
determining the second gray scale value corresponding to the brightness value according to the brightness value and the preset gamma curve;
the preset gamma curve is a corresponding relation between a brightness value solidified in the liquid crystal display panel and the second gray scale value, and the target gamma curve is a corresponding relation between a brightness value obtained through theoretical calculation and the first gray scale value.
7. The brightness adjustment system of claim 6, wherein the target gamma curve is a linear function determined according to both end points of the preset gamma curve.
8. A brightness adjustment system, comprising: a liquid crystal display panel, the liquid crystal display panel comprising: the device comprises a selection module, a first storage module and a second storage module;
the first storage module is used for storing the corresponding relation between a first gray-scale value in a target gamma curve and a second gray-scale value in a preset gamma curve and the gray-scale voltage corresponding to the second gray-scale value;
the second storage module is used for storing the corresponding relation between the second gray scale value and the brightness value in the preset gamma curve and the gray scale voltage corresponding to the second gray scale value;
the selection module is used for selectively calling data in the first storage module or the second storage module to drive each pixel to be lightened according to the display mode of the liquid crystal display panel; the selection module is specifically configured to:
judging whether the liquid crystal display panel is used for 3D printing or not;
when the liquid crystal display panel is determined to be used for 3D printing, calling data in the first storage module to drive each pixel to be lightened;
and when the liquid crystal display panel is determined to be used for displaying, calling the data in the second storage module to drive each pixel to be lightened.
9. A3D printing device, comprising: a print slot, a light source, and a brightness adjustment system according to any one of claims 6-7, or a brightness adjustment system according to claim 8.
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| CN114067616A (en) * | 2020-07-29 | 2022-02-18 | 深圳Tcl数字技术有限公司 | Dynamic contrast ratio quantification method, device and equipment and readable storage medium |
| CN111941846A (en) * | 2020-08-06 | 2020-11-17 | 深圳市纵维立方科技有限公司 | Light equalizing method and device for LCD photocuring 3D printer |
| CN116684563B (en) * | 2023-07-28 | 2023-10-13 | 成都九天画芯科技有限公司 | Light quality correction method and system for image display and image display method and system |
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| CN100407264C (en) * | 2005-11-25 | 2008-07-30 | 帆宣系统科技股份有限公司 | Brightness compensation method of two-dimensional display |
| TWI376677B (en) * | 2007-07-13 | 2012-11-11 | Novatek Microelectronics Corp | Flat display and method for driving the same |
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