CN114268722A - Liquid crystal molecular formula camera module and imaging method thereof - Google Patents
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- 239000011248 coating agent Substances 0.000 claims abstract description 71
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- 206010070834 Sensitisation Diseases 0.000 description 7
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Abstract
The invention relates to the technical field of camera devices, and discloses a liquid crystal molecular formula camera module and an imaging method thereof, wherein the liquid crystal molecular formula camera module comprises a liquid crystal film, a black-and-white photosensitive chip and a driving device; the liquid crystal film is used for filtering light rays and comprises a red light coating film, a green light coating film and a blue light coating film; the red light coating film is used for providing a monochromatic light channel of red light; the green light coating film is used for providing a monochromatic light channel of green light; the blue light coating is used for providing a monochromatic light channel of blue light; the black-and-white photosensitive chip is used for sensing light rays filtered by the liquid crystal film; the driving device is used for controlling the opening and closing of the monochromatic light channels. The module provided by the invention has a simple structure, and can achieve the effects of improving image pixels and image resolution, improving image color reduction degree and integrally improving image quality under the condition of ensuring the volume of a miniaturized module.
Description
Technical Field
The invention relates to the technical field of camera devices, in particular to a liquid crystal molecular formula camera module and an imaging method thereof.
Background
At present, most mobile equipment such as mobile phones and tablet computers carry camera modules, the conversion between optical signals and electric signals is realized through the camera modules, and image information is recorded and stored, so that the photographing and photographing functions are realized. Compared with the conventional camera system, the mobile phone camera module is widely applied to various new-generation portable camera devices due to the advantages of miniaturization, low power consumption, low cost, high image quality and the like. In recent years, the development direction of smart phones is mainly optical innovation, the camera shooting function equipped by the smart phones is more and more diversified, the performance requirement of a user on a camera and the imaging quality requirement of the camera are higher and higher, and under the large background, the camera shooting module needs to be correspondingly improved so as to meet the current higher image quality requirement.
The imaging quality of the camera module is closely related to the mode and the capability of processing incident light, an optical filter is usually arranged in the camera module and is used for filtering stray light areas of interference wave bands in the incident light and only reserving light rays of required wave bands, so that the light rays of the required wave bands can be transmitted to a photosensitive chip, and the photosensitive chip and the like can realize conversion from optical signals to electric signals to digital signals and then image. In the existing camera module improvement method, an optical path translation mode, a sensor translation mode and the like are adopted, and more image information is obtained by adjusting an optical path so as to achieve the effect of improving the image resolution. However, in the above-mentioned manner, when the image quality is specifically implemented, a corresponding position adjustment structure is often required to be added, which may cause a negative effect on the overall size of the image capturing module, and meanwhile, the image quality is improved with a single dimension, and only the improvement resolution ratio still cannot meet the current high image quality requirement.
Disclosure of Invention
The invention aims to provide a liquid crystal molecular formula camera module and an imaging method thereof, the module is simple in structure, and the effects of improving image pixels and image resolution, improving image color reduction degree and integrally improving image quality can be achieved under the condition of ensuring the volume of a miniaturized module.
In order to achieve the above purpose, the invention provides the following scheme:
the first scheme is as follows:
a liquid crystal molecular formula camera module comprises a liquid crystal film, a black-and-white photosensitive chip and a driving device; the liquid crystal film is used for filtering light rays and comprises a red light coating film, a green light coating film and a blue light coating film; the red light coating film is used for providing a monochromatic light channel of red light; the green light coating film is used for providing a monochromatic light channel of green light; the blue light coating is used for providing a monochromatic light channel of blue light; the black-and-white photosensitive chip is used for sensing light rays filtered by the liquid crystal film; the driving device is used for controlling the opening and closing of the monochromatic light channels.
The working principle and the advantages of the scheme are as follows: the whole camera module is not provided with an optical filter any more, the optical filter in the conventional camera module is replaced by a liquid crystal film, and the liquid crystal film realizes the light filtering effect, wherein the liquid crystal film comprises a red light coating film, a green light coating film and a blue light coating film, the three films only provide monochromatic light channels corresponding to color light, and after the light passes through the coating films of the liquid crystal film, the red, green and blue light are completely retained, so that the light filtering effect is better; meanwhile, the thickness of the liquid crystal film is smaller than that of the optical filter, and the whole volume of the module is smaller.
The driving device can control the opening and closing of the monochromatic light channels, and the opening and closing of different monochromatic light channels are controlled, for example, the monochromatic light channel for controlling blue light is opened, the monochromatic channels for green light and red light are closed, and only blue light is transmitted; the light transmission of full red light, full green light or full blue light can be realized, and the black-and-white photosensitive chip correspondingly realizes full photosensitive red, full photosensitive green or full photosensitive blue; furthermore, each formed pixel realizes full sensitization of red, green and blue primary color light, and accordingly, image pixels and image resolution can be improved. The black-white photosensitive chip can obtain the colored light of three primary colors while keeping the better light-sensitive capacity that equals with black and white camera to the photosensitive capacity that has realized like with black and white camera accomplishes the color and shoots, compares in the current module of making a video recording that adopts light filter and ordinary photosensitive chip, and the whole module of making a video recording of this scheme has stronger photosensitive capacity and detail analysis ability, and image color reduction degree is higher, can promote image quality by a wide margin.
In addition, compare the camera module that adopts the light filter among the prior art conventionally, this scheme is breakthrough to replace light filter work with the liquid crystal film to trade black and white sensitization chip, improved the light sensing ability of camera module effectively with the structural change of more details. Compared with the prior art that three sub-modules comprising black and white cameras and color filtering are arranged, the three sub-modules are required to shoot simultaneously during shooting, the whole module is large in size, a plurality of cameras are required to be controlled simultaneously, and errors exist in control; this scheme then need not to set up so many structures of making a video recording, and whole module structure is succinct, and the volume is less, can effectively promote image quality simultaneously.
Further, the red light coating film, the green light coating film and the blue light coating film are sequentially overlapped.
Adopt superimposed structure, each layer of coating film can both filter the light that gets into the module completely, guarantees fully to filter light.
Further, liquid crystal molecular layers are arranged between the red light coating film and the green light coating film and between the green light coating film and the blue light coating film; the liquid crystal molecular layer is a semi-insulating material layer coated with liquid crystal molecules; when the driving device controls the opening and closing of each monochromatic light channel, the opening and closing of each monochromatic light channel are controlled by controlling the liquid crystal molecule curvature of the liquid crystal molecule layer.
Different curved directions of liquid crystal molecules can produce different light refracting indexes, and through changing the liquid crystal molecule curved direction, and then change the refracting index of liquid crystal molecule layer for light can be refracted to black and white photosensitive chip or be refracted outside black and white photosensitive chip, has controlled passing through and ending of light in other words, is equivalent to the effect that reaches opening and shutting of each monochromatic light passageway of control. By the arrangement, the characteristics of the liquid crystal molecules are ingeniously utilized, and the control mode is effective.
Further, a power-on signal line is connected between the liquid crystal film and the rigid-flex board; the number of the electrified signal lines is two and the electrified signal lines are connected with the liquid crystal molecular layers; the rigid-flex board is also electrically connected with the driving device.
Set up like this, liquid crystal film, rigid-flex board and drive arrangement all insert in same module circuit, and the drive arrangement of being convenient for passes through rigid-flex board and circular telegram signal line and then control the liquid crystal molecular layer, guarantees that the drive can convey.
Further, the driving device is a driving IC chip.
The setting like this adopts the opening and shutting of each monochromatic light passageway of drive IC chip control, and the debugging is convenient, and control mode is simple effective.
Further, a voltage driving strategy is preset in the driving device; the driving device adjusts the voltage according to the voltage driving strategy to change the orientations of the liquid crystal molecules when changing the orientations of the liquid crystal molecules.
The arrangement is that the voltage is regulated according to a voltage driving strategy to change the curvature of liquid crystal molecules, the regulation mode is regular and orderly, the opening and closing of each monochromatic light channel are regularly switched and regulated, the cut-off of light during imaging at each time is carried out according to the strategy, the quality of output images can be relatively stable, and the camera module can stably output high-quality images.
Furthermore, the side surfaces of the liquid crystal film are provided with semi-insulating material layers.
By the arrangement, the periphery of the liquid crystal film is coated by the semi-insulating material layer, so that liquid crystal molecules in the liquid crystal film are prevented from being interfered by external current and voltage, the voltage is kept consistent with the linearity of the opening and closing state, and the control of a light ray channel is ensured to be effective.
Further, the red light coating film, the green light coating film and the blue light coating film are all transparent PI films.
By adopting the high-transparency PI film, no extra loss exists when light penetrates through the liquid crystal film, and the high transmittance of the light can be effectively ensured.
Scheme II:
an imaging method of a liquid crystal molecular formula camera module adopts the liquid crystal molecular formula camera module, and comprises the following steps:
step 1: the incident light enters the liquid crystal molecular formula camera module; the incident light reaches the liquid crystal film;
step 2: the driving device adjusts voltage according to a voltage driving strategy to change the curvature of liquid crystal molecules and control the corresponding monochromatic light channels to be opened and closed in sequence; effective incident light passes through the liquid crystal film;
and step 3: when each monochromatic light channel is opened, collecting a frame of full-photosensitive image;
and 4, step 4: and synthesizing all the acquired full-photosensitive images to obtain an output image.
The working principle and the advantages of the scheme are as follows: after the incident light is filtered by the liquid crystal film, invalid light in the light is filtered, only the valid incident light can reach the next camera shooting assembly through the liquid crystal film, and the liquid crystal film can well complete the filtering work. And after incident light reaches the liquid crystal film, the driving device can control the opening and closing of the monochromatic light channel, the corresponding monochromatic light channel is opened, only one of red light, green light or blue light is supplied for one time to pass through, when the channel is opened, images of fully photosensitive blue, fully photosensitive green or fully photosensitive red can be collected, and the output images are the integration of a plurality of fully photosensitive images. Each pixel block of the output image has the integrated effect of a plurality of all-photosensitive image pixel blocks, the image pixel and the image resolution can be improved by multiple times, and the super-resolution effect is achieved.
Further, in step 4, the fully-sensitive image includes three fully-sensitive images of fully-sensitive red, fully-sensitive green, and fully-sensitive blue.
According to the arrangement, three full-sensitive images of full-sensitive red, full-sensitive green and full-sensitive blue correspond to three primary colors of color light, the three primary colors of light are integrated in different proportions, and color vision equivalent to visible light of various frequencies can be formed, so that the full-sensitive image in the step 4 prepares sufficient image information for the formation of an output image in the subsequent step 5, and the output image synthesized by the full-sensitive images of the three primary colors has brighter image colors, better color reduction degree, richer detail information and higher image resolution.
Drawings
Fig. 1 is a schematic structural diagram of a camera module according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a liquid crystal film according to an embodiment of the liquid crystal molecular formula camera module and an imaging method thereof.
Fig. 3 is a schematic diagram of a fully-sensitized red color in a filtering process of a liquid crystal film according to an embodiment of a liquid crystal molecular formula camera module and an imaging method thereof.
Fig. 4 is a schematic diagram of a full-light-sensitive green color in a filtering process of a liquid crystal film according to an embodiment of the liquid crystal molecular formula camera module and an imaging method thereof.
Fig. 5 is a schematic diagram of a full light-sensitive blue color in a filtering process of a liquid crystal film according to an embodiment of the liquid crystal molecular formula camera module and an imaging method thereof.
Detailed Description
The following is further detailed by the specific embodiments:
the reference numbers in the drawings of the specification include: the lens comprises a lens 1, a lens seat 2, a liquid crystal film 3, a black-and-white photosensitive chip 4, a soft-hard combination board 5, a drive IC chip 6, an energizing signal line 7, a capacitor 8, a reinforcing glue 9, a connector 10, a red light coating film 31, a green light coating film 32, a blue light coating film 33, a liquid crystal molecular layer 34 and a semi-insulating material layer 35.
The embodiment is basically as shown in the attached figures 1, 2, 3, 4 and 5: a liquid crystal molecular formula camera module comprises a lens 1, a lens base 2, a liquid crystal film 3, a black-white photosensitive chip 4, a driving device, a rigid-flex board 5, reinforcing glue 9, a capacitor 8 and a connector 10. The liquid crystal film 3 is used for filtering light, and the liquid crystal film 3 comprises a red light coating film 31, a green light coating film 32 and a blue light coating film 33; the red light coating film 31 is used for providing a monochromatic light channel of red light; the green light coating film 32 is used for providing a monochromatic light channel of green light; the blue light coating film 33 is used for providing a monochromatic light channel of blue light; the black-and-white photosensitive chip 4 is used for sensing light rays filtered by the liquid crystal film 3; the driving device is used for controlling the opening and closing of the monochromatic light channels.
Specifically, the lens 1, the lens base 2, the liquid crystal film 3, the black-and-white photosensitive chip 4, the driving device, the capacitor 8, the rigid-flexible board 5, the reinforcing glue 9 and the connector 10 are sequentially arranged. The red light coating film 31, the green light coating film 32 and the blue light coating film 33 of the liquid crystal film 3 are sequentially superposed, and liquid crystal molecular layers 34 are arranged between the red light coating film 31 and the green light coating film 32 and between the green light coating film 32 and the blue light coating film 33; the layer of liquid crystal molecules 34 is a layer of semi-insulating material 35 coated with liquid crystal molecules. The liquid crystal film 3 is provided with semi-insulating material layers 35 on the side surfaces, and in this embodiment, the liquid crystal film 3 is in a rectangular parallelepiped shape, that is, the semi-insulating material layers 35 are provided on the four side surfaces of the liquid crystal film 3. The red light coating film 31, the green light coating film 32 and the blue light coating film 33 are all transparent PI films, and ultrathin high-transparency PI films are adopted in the embodiment, so that light loss is avoided when light penetrates through the liquid crystal film 3, and meanwhile, the whole thickness of the liquid crystal film 3 is small.
An energizing signal line 7 is connected between the liquid crystal film 3 and the rigid-flex board 5, and the liquid crystal film 3 is connected into a circuit on the rigid-flex board 5 through the energizing signal line 7. The rigid-flex board 5 is also electrically connected with a driving device, the driving device is also connected into a circuit on the rigid-flex board 5 and is in the same circuit with the liquid crystal film 3, and after the subsequent camera module is integrally connected with a terminal to be connected, such as a mobile phone, a tablet personal computer and the like, the whole circuit forms a complete power supply signal path.
The number of the energizing signal lines 7 is two and both are connected to the liquid crystal molecule layer 34. Specifically, one of the energizing signal lines 7 is connected to the liquid crystal molecular layer 34 between the red plating film 31 and the green plating film 32, and the other energizing signal line 7 is connected to the liquid crystal molecular layer 34 between the green plating film 32 and the blue plating film 33. With such an arrangement, the subsequent voltage can be stably input to different liquid crystal molecular layers 34, and the liquid crystal molecular layers 34 can be sufficiently controlled. The driving device controls the opening and closing of the monochromatic light channels by controlling the liquid crystal molecules of the liquid crystal molecule layer 34 to bend when controlling the opening and closing of the monochromatic light channels. A voltage driving strategy is preset in the driving device; the driving device adjusts the voltage according to the voltage driving strategy to change the orientations of the liquid crystal molecules when changing the orientations of the liquid crystal molecules. In addition, when the liquid crystal molecules are bent by the voltage, the arrangement states of the coating molecules in the red light coating 31, the green light coating 32 and the blue light coating 33 are changed correspondingly.
Specifically, the driving device is a driving IC chip 6. The voltage driving strategy is to input proper voltage on the two power-on signal lines 7, the voltage value is controlled within the range of 1V-12V, the voltage is transmitted to the liquid crystal molecular layer 34 of the liquid crystal film 3, the liquid crystal molecular layer 34 adopts a semi-insulator material coated with liquid crystal molecules, the semi-insulator material can be used as a resistor, the distance from each area on the material to the voltage input position is different, the resistance value formed by the material is different, further, the voltage correspondingly obtained by each area on the material is different, and the curvature direction of the liquid crystal molecules coated on the semi-insulator material is also different under the influence of different voltage values. For example, as shown in fig. 3, 4, and 5, in the present embodiment, the driving IC chip 6 adjusts the voltage, and inputs the voltage of 6V, the voltage of 3V, and the voltage of 5V in sequence. When 6V voltage is input, the curved distribution arrangement of the liquid crystal molecules changes, so that a red light monochromatic light channel of the red light coating film 31 is opened, namely only red light is refracted and transmitted, the coating molecules of the green light coating film 32 and the blue light coating film 33 are adjusted to be in a transmission state, other light is completely cut off, and the liquid crystal film 3 only allows the red light to pass through; similarly, when a 3V voltage is input, the liquid crystal molecules change in the zigzag distribution arrangement again, only green light is refracted and transmitted, and the liquid crystal film 3 only allows the green light to pass through; when a voltage of 5V is input, only blue light is refracted and transmitted, and only blue light can be allowed to pass through the liquid crystal film 3.
According to the liquid crystal molecular formula camera module provided by the embodiment, a filter structure in a conventional camera module is eliminated, and the liquid crystal film 3 provides a filtering function. Simultaneously, be equipped with three primary colors coating film and liquid crystal molecule layer 34 in liquid crystal film 3, change liquid crystal molecule tortuous to the effect that opens and shuts in order to reach the monochromatic light passageway of control difference through voltage control, can realize passing through with the control of cutting to the light of each colour of red, green, blue, realize the light transmission of full ruddiness, full green glow or full blue light, the cooperation is sensitization with black and white sensitization chip 4, each pixel piece that forms and then all realize the full sensitization of three primary colors light, correspondingly, image color reduction degree and image resolution ratio homoenergetic enough obtain promoting.
This scheme has constructed a brand-new camera module structure, creatively is applied to materials such as liquid crystal molecule in the camera module structure to the cooperation is with black and white sensitization chip 4, when the higher light-sensitive capacity that make full use of black and white sensitization chip 4 possessed, reaches clear color imaging effect, compares in current conventional camera module, can guarantee that whole module structure is succinct, under the less circumstances of whole module volume, reaches the effect that promotes image resolution and color reduction degree.
Compared with a conventional camera module, the structure replacement degree of the scheme is small, the scheme can be applied to rapidly upgrade the conventional camera module, for example, the overall resolution of the conventional camera module adopting a 50M photosensitive chip can be improved to 150M by the scheme, the color reduction degree of the imaged image is expected to be improved by about 75% compared with that of a conventional Bayer array chip, and the color reduction degree of red and blue colors is expected to be improved by about 50%; the imaging effect is improved remarkably, and the applicability is strong.
The embodiment further provides an imaging method of the liquid crystal molecular formula camera module, which adopts the liquid crystal molecular formula camera module as above, and comprises the following steps:
step 1: the incident light enters the liquid crystal molecular formula camera module; the incident light reaches the liquid crystal film 3.
Step 2: the driving device adjusts voltage according to a voltage driving strategy to change the curvature of liquid crystal molecules and control the corresponding monochromatic light channels to be opened and closed in sequence; the effective incident light passes through the liquid crystal film 3. In this embodiment, the effective incident light specifically refers to light left after the incident light is filtered out of stray light, where the stray light includes infrared light and ultraviolet light other than visible light. With such an arrangement, only the effective incident light can completely pass through the liquid crystal film 3, and the stray light is completely filtered by the liquid crystal film 3, so that the stray light is prevented from projecting onto the photosensitive chip to generate redundant and ineffective charges.
And step 3: when each monochromatic light channel is opened, a frame of full-photosensitive image is collected. Specifically, the driving device controls the opening of the monochromatic light channel of the red light, the closing of the monochromatic light channels of the rest of the color lights, only the red light passes through the liquid crystal film 3, the black-and-white photosensitive chip 4 fully senses the red light, and at the moment, a full photosensitive image of one frame of the fully photosensitive red light is collected. Similarly, the driving device controls the opening of the monochromatic light channel of the green light to collect a frame of full-photosensitive green full-photosensitive image. The driving device controls the opening of the monochromatic light channel of the blue light and collects a frame of full-photosensitive blue full-photosensitive image. In this embodiment, three frames of full-sensitive images corresponding to three primary colors of light are collected.
And 4, step 4: and synthesizing all the acquired full-photosensitive images to obtain an output image. The fully photosensitive images include three fully photosensitive images of fully photosensitive red, fully photosensitive green and fully photosensitive blue. The synthesizing operation is performed by terminals such as a mobile phone and a tablet computer which are connected with the camera module subsequently. In addition, in the embodiment, the fully photosensitive red specifically means that the liquid crystal film 3 only allows red light to pass through, and the black-and-white photosensitive chip 4 only can sense the red light, which means the fully photosensitive red; fully sensitized green and fully sensitized blue are similar to fully sensitized red.
The imaging method of the liquid crystal molecular formula camera module provided by this embodiment acquires three frames of full-sensitive images corresponding to three primary colors during imaging, and synthesizes the images to obtain a final output image. The photosensitive data correspondingly adopted by each pixel of the output image comprises sufficient three-primary-color light information, and each pixel block has the integrated effect of a plurality of full photosensitive image pixel blocks, so that the image pixel and the image resolution can be improved by multiple times.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. A liquid crystal molecular formula camera module is characterized by comprising a liquid crystal film, a black-and-white photosensitive chip and a driving device; the liquid crystal film is used for filtering light rays and comprises a red light coating film, a green light coating film and a blue light coating film; the red light coating film is used for providing a monochromatic light channel of red light; the green light coating film is used for providing a monochromatic light channel of green light; the blue light coating is used for providing a monochromatic light channel of blue light; the black-and-white photosensitive chip is used for sensing light rays filtered by the liquid crystal film; the driving device is used for controlling the opening and closing of the monochromatic light channels.
2. The liquid crystal molecular formula camera module of claim 1, wherein the red light coating film, the green light coating film and the blue light coating film are sequentially stacked.
3. The liquid crystal molecular formula camera module of claim 2, wherein liquid crystal molecular layers are disposed between the red light coating film and the green light coating film and between the green light coating film and the blue light coating film; the liquid crystal molecular layer is a semi-insulating material layer coated with liquid crystal molecules; when the driving device controls the opening and closing of each monochromatic light channel, the opening and closing of each monochromatic light channel are controlled by controlling the liquid crystal molecule curvature of the liquid crystal molecule layer.
4. The liquid crystal molecular formula camera module of claim 3, wherein a power-on signal line is connected between the liquid crystal film and the rigid-flex board; the number of the electrified signal lines is two and the electrified signal lines are connected with the liquid crystal molecular layers; the rigid-flex board is also electrically connected with the driving device.
5. The liquid crystal molecular formula camera module of claim 1, wherein the driving device is a driving IC chip.
6. The liquid crystal molecular formula camera module of claim 4, wherein a voltage driving strategy is preset in the driving device; the driving device adjusts the voltage according to the voltage driving strategy to change the orientations of the liquid crystal molecules when changing the orientations of the liquid crystal molecules.
7. The LCM camera module of claim 4, wherein the liquid crystal film has semi-insulating material layers on the sides.
8. The liquid crystal molecular formula camera module of claim 2, wherein the red light coating film, the green light coating film and the blue light coating film are transparent PI films.
9. An imaging method of a liquid crystal molecular formula camera module, which is characterized in that the liquid crystal molecular formula camera module according to any one of claims 1 to 8 is adopted, and the method comprises the following steps:
step 1: the incident light enters the liquid crystal molecular formula camera module; the incident light reaches the liquid crystal film;
step 2: the driving device adjusts voltage according to a voltage driving strategy to change the curvature of liquid crystal molecules and control the corresponding monochromatic light channels to be opened and closed in sequence; effective incident light passes through the liquid crystal film;
and step 3: when each monochromatic light channel is opened, collecting a frame of full-photosensitive image;
and 4, step 4: and synthesizing all the acquired full-photosensitive images to obtain an output image.
10. The method as claimed in claim 9, wherein in step 4, the fully-sensitive image includes three fully-sensitive images of fully-sensitive red, fully-sensitive green and fully-sensitive blue.
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