CN1753508A - Constitiution method and device used for flat plate TV light and colour automatic regulating and testing system - Google Patents

Abstract

The patent of the invention relates to the measurement and debugging technology of video display products, and is especially suitable for the composition method and device of the light color automatic debugging system for flat-panel TVs such as PDP TVs and LCD TVs. The present invention proposes a composition method for an automatic light and color commissioning system for a flat-panel TV, which enables the system's color analysis card and digital and analog video signal boards to be physically and reasonably integrated with the system host, making the system configuration simpler and easier. The system device adopts a dual-channel color analysis card and two optical imaging chromaticity probes. The system is equipped with a three-dimensional detection platform, so that the two chromaticity probes installed on the detection platform can be easily adjusted in three dimensions to meet various specifications. Dimensions Screen light and color measurement of the flat-panel TV under test, and requirements for contact or non-contact measurement. Automatic adjustment of light and color of flat-panel color TV, fast speed and good quality, the efficiency of product adjustment on the production line is doubled, and the use efficiency of system devices can be better utilized.

Description

Composition method and device for flat-panel TV light and color automatic commissioning system

Field

The patent of the invention relates to the measurement and debugging technology of video display products, and is especially suitable for the composition method and device of the light color automatic debugging system of flat-panel TVs such as plasma (PDP) TVs and liquid crystal (LCD) TVs.

Background technique

Televisions using liquid crystal (LCD) and plasma (PDP) flat panel display devices are collectively referred to as flat panel televisions. As we all know, the salient features of flat-panel TVs are thin thickness, light weight, low power consumption, no flicker, and no radiation; in addition, flat-panel TVs have rich interfaces, which can receive cable TV radio frequency (RF), VCD video (AV), computer (RGB) ), digital DVI and analog YPrPb video signals. Because flat-panel TV can well meet the needs of digital TV, it has become the mainstream of the development of next-generation color TV and will become the most powerful competitor for the dominance of the next-generation TV market.

As a digital information display terminal, the flat panel TV's light and color performance is an extremely important technical performance index. Compared with traditional CRT color TVs, flat panel TVs still have differences in the vividness and authenticity of color reproduction; color uniformity, contrast, viewing angle and other aspects. In view of the fact that flat-panel TVs have many significant advantages compared with traditional CRT color TVs, the market demand for flat-panel TVs is increasing day by day. Both international and domestic display industries are devoted to the development of flat-panel TVs, and new products are constantly being introduced to the market. In the general environment of the market economy, the competition of similar products is very fierce. Enterprises in the industry and even outside the industry are optimistic about the business opportunities of flat-panel TVs and squeeze into it one after another.

The competition connotation of flat-panel TVs, in addition to improving the technical performance of products, and continuously researching and improving the characteristics of flat-panel TV display devices, businesses also pay great attention to the detection and adjustment of their light and color performance in the production process of flat-panel TVs, so that flat-panel TVs The product can achieve the best light and color performance to meet people's needs for digital TV. At the same time, business operators must pursue the low cost and high efficiency of the product's light and color performance measurement and adjustment system. Therefore, it is necessary and crucial to propose methods and devices for detecting and adjusting the light and color performance of flat-panel TVs.

People are not difficult to find from prior art, it has following defective:

(1) At present, many enterprises adopt the traditional method of forming TV light and color measurement systems to test flat-panel TVs. The main equipment usually consists of two different types of color analyzers, a single chromaticity probe, and a dedicated video signal source. Composition, the equipment of the system is independent of each other, the composition configuration is extremely complicated, and the use efficiency is difficult to exert.

(2) Liquid crystal (LCD) TV and plasma (PDP) TV, both of which are flat-panel TVs, use different display devices, and their luminous characteristics have obvious differences. Therefore, LCD TVs and plasma TVs must adopt different equipment and technical measures in production and testing. Currently, different color analysis instruments must be used to measure the light-color characteristics of LCD TVs and plasma TVs: chromaticity coordinates and brightness. The main difference in the color analyzers used is the use of different colorimetric probes. LCD TVs have different brightness in all directions, so a chromaticity probe with an optical imaging lens must be used to measure the color in a certain direction. PDP TVs can be considered to have the same brightness in all directions, which can be measured with a color analyzer that measures ordinary CRT color TVs.

(3) Liquid crystal (LCD) TVs and plasma (PDP) TVs, which are both flat-panel TVs, have the same requirements for the production line during the assembly and debugging process, so LCD TVs and plasma TVs are generally produced on the same production line. However, LCD TVs and plasma TVs must be measured by different color analyzers. Therefore, two sets of color analyzers need to be placed on the same station of the co-production line, resulting in crowded work station space and increased investment in measuring equipment and instrumentation. Alternate idle and reduce efficiency.

(4) Flat-panel TVs can receive both analog and digital signals. Due to the different signal processing circuits, the light and color characteristics of flat-panel TVs will vary with the type of input signal. In order to ensure the best light and color display characteristics, under different signals, it is necessary to adjust the circuit parameters of the TV to ensure the consistency, vividness and authenticity of color reproduction. At present, the signal sources for flat-panel TV debugging on the market provide detection signals such as light color, geometric image, and accompanying sound of RF, AV, RGB, DVI, YPrPb and other signal systems, and are mainly used for visually comparing the light and color performance of color TVs. Professional signal source pattern design requires high requirements, the circuit is very complicated, light color test and automatic adjustment are inconvenient, and the price is relatively expensive. In fact, using an instrument to test and automatically adjust the light color of a flat-panel TV requires only a grayscale signal with controllable brightness. Obviously, using the above-mentioned professional signal source is wasteful and the cost of the system is high.

(5) The chromaticity adjustment of flat-panel TVs mainly adopts the process of hand-held or contact-type manual adjustment of chromaticity probes with a microphone tripod. The speed of manually adjusting the position of the chromaticity probe by the contact method of the tripod is slow, and it is difficult to meet the chromaticity commissioning quality of LCD color TV and PDP color TV and the efficiency requirements of large-screen size flat-panel TV commissioning of various specifications. Moreover, the measurement process is increased. personnel and costs.

Contents of the invention

The purpose of the present invention is in order to overcome the above-mentioned defect of prior art, proposes a kind of method and the device that can simultaneously measure the light and color performance detection and adjustment of liquid crystal (LCD) color TV and plasma (PDP) color TV that belong to flat panel TV.

The technical scheme adopted in the present invention is:

The composition method and device for the automatic light and color adjustment system for flat-panel TVs is that: the composition method for the light-color automatic adjustment system for flat-panel TVs at least includes the following steps:

Step 1. First, establish a flat-panel TV light and color automatic commissioning system. The system consists of a system host 1, system software and light and color measurement software 2, a color analysis card 3, a chromaticity probe 4, a three-dimensional detection platform 5, a video signal source 6 and data Composed of an output interface board 7, the system commissioning object is a flat-panel TV 8;

Step 2, connecting the flat-panel TV 8 under test to the flat-panel TV light and color automatic commissioning system;

Step 3, according to the screen size specification of the flat-panel TV under test, adjust the distance between the two chromaticity probes on the three-dimensional detection platform 5 and the detection distance and position relative to the flat-panel TV under test;

Step 4. Automatically adjust and measure the light and color of the flat-panel TV 8 under test:

a. Start the system host, call the light color automatic commissioning program, and the system enters the measurement interface;

b. Set the relevant parameters of light color automatic commissioning:

c. Automatically select the video signal source;

d. Debug the white balance of the flat-panel TV under test under different input video signals:

①Start the system white balance measurement and adjustment program;

②Set adjustment parameters;

③The system host controls the signal source to generate the white balance debugging signal of left dark and right white, and receives the measurement result color coordinates x, y and brightness Y from the color analysis card, and displays the error with the standard white field;

④According to the measurement results, automatically adjust the color coordinates and brightness of bright field and dark field;

⑤ After the measurement results of the bright field and dark field are all qualified, store the commissioning results into the corresponding storage unit of the flat-panel TV; complete the white balance measurement and adjustment.

The system device for automatically adjusting light color of flat-panel TV constituted by the method, as shown in FIG. Composed of analysis card 3, chromaticity probe 4, three-dimensional detection platform 5, video signal source 6 and output interface board 7, the system commissioning object is a flat-panel TV 8; where:

The system host 1 is an industrial control machine or computer with a display. The host is loaded with an operating system and light color measurement software 2. The main board is equipped with more than 6 spare slots for color analysis cards and multiple signal sources. The plug-in provides a slot, and the data communication bus and interface of the system host 1 are respectively connected to the output end of the color analysis card 3 and the data communication interface of the flat-panel TV 8 under test, and the white balance data processed by the light color adjustment is sent to the flat-panel under test through the output interface board 7 TV 8;

As shown in Figure 2, the block diagram of functional modules configured on the main board of the system main board of the embodiment of the present invention is inserted with a dual-channel color analysis card 21, an RGB digital signal board 22, a YPrPb analog signal board 23, and an AV signal board on the spare slot of the main board of the system main board Board 24 and output interface board 25;

The system host 1 preferably has an industrial control machine with a display, and the I ² C data communication bus and the RS232 serial interface of the system host 1 are respectively connected with the output end of the color analysis card 3 and the corresponding data communication interface of the flat-panel TV 8 under test. The light color adjustment data processed by the host, that is, the red, green and blue (RGB) white balance data is sent to the flat-panel TV under test 8 through the data output interface board 7 to the serial communication interface to control the color TV to change its RGB parameters.

Described color analysis card 3 is a plug-in board, and color analysis card 3 is inserted on the motherboard slot of system host; The signal input end on the color analysis card 3 is connected the output end of chromaticity probe, receives the output of chromaticity probe 4 The signal is analyzed and processed for chromaticity and brightness, and its output terminal is connected to the system host 1;

The color analysis card 3 can replace two sets of color analysis instruments dedicated to liquid crystal (LCD) color TVs and plasma (PDP) color TVs;

The chromaticity probe 4 is a chromaticity probe with an optical imaging lens, which is suitable for light and color measurement of liquid crystal (LCD) color TVs and plasma (PDP) color TVs. The system adopts a dual chromaticity probe configuration, and the two chromaticity probes have the same performance , improving the light and color measurement rate of the flat-panel TV;

The three-dimensional detection platform 5 is at least composed of a two-dimensional platform guide rail and a one-dimensional lifting rod. According to the measurement requirements of flat-panel TVs with different specifications and screen sizes, the two-dimensional platform guide rail and the one-dimensional lifting mechanism are used for three-dimensional movement to adjust the two chromaticity. The distance between the probe and the flat-panel TV screen under test and their measurement positions relative to the flat-panel TV screen meet the requirements of large-screen size, commissioning speed and efficiency of various flat-panel TVs;

The two chromaticity probes receive the chromaticity signal at the corresponding position of the flat-panel TV screen under test, and the output terminals of the two probes are connected to the input terminals of the two luminance and grayscale signal analysis channels of the color analysis card;

The video signal source 6 is an economical mixed signal source, at least including a plurality of signal source plug-in boards of RGB, AV, and YPrPb to meet the requirements of light color measurement of flat-panel TVs, and each video signal source plug-in board is installed on the system host 1 In the motherboard slot, the output end of the mixed signal source is connected to the video signal input end of the flat-panel TV under test, and the selected video signal is transmitted to the video signal input end of the flat-panel TV under test according to the signal source selected by the system host.

The described automatic commissioning system for light and color of flat-panel TVs is that: the color analysis card is a dual-channel color analysis card, and the card is equipped with two chromaticity signal analysis and processing channels, and each channel is matched with a chromaticity probe. The dual-channel color analysis card in the main board slot of the system host, the signal input terminals of the two channels are shunted to the output terminal of a chromaticity probe, receive the output signals of each chromaticity probe, and perform chromaticity and brightness analysis and processing. After the output of the two channels is processed by the single-chip microcomputer system on the color analysis card, it is connected to the system host through the RS232 data communication line, and the data is sent to the system host for calculation and processing.

The described automatic commissioning system for light and color of flat-panel TVs is that the chromaticity probe is mainly composed of a lens barrel with a hole bar, a lens, a three-color filter, a photoelectric conversion device, a circuit board and a data transmission plug, wherein:

The chromaticity probe is a dual-lens probe for optical imaging. Lens 1 and lens 2 have the same size and are installed in parallel on the lens barrel. The plane where the double lenses are located is perpendicular to the axis of the lens barrel, so that the chromaticity probe can ensure the optical imaging quality; the structure of the lens barrel Parameters The distance r ₂ from the lens to the imaging surface, the transmittance τ of the lens and the area S of the lens are all constants. The illuminance E of the imaging surface is proportional to the brightness Y of the light-emitting surface. The detection result does not change with the change of the distance r _1. When the chromaticity When the probe lens plane changes with the measurement of the flat TV screen, the detection results can remain unchanged. The distance selection range is 0-140mm, and the contact measurement with a distance of 0 or the non-contact measurement with a distance can meet the requirements. Colorimetric measurement requirements;

The three-color filter adopts three groups of red, green and blue (RGB) filters, and each group of filters is closely attached to a photoelectric conversion device, and the three photoelectric conversion devices and their output analog signal amplifiers are all installed on a circuit board. The output of the amplifier is connected to the transmission plug, and the photoelectric conversion device of the chromaticity probe is a silicon photocell.

The described automatic commissioning system for light and color of flat-panel TVs is that: the three-dimensional detection platform is mainly composed of probe moving guide rails, X-direction and Y-direction two-dimensional platform, Z-direction one-dimensional lifting mechanism, cylinder buffer head and cylinder, base plate and four composed of a roller with a lock;

The moving guide rail of the probe is fixed on the X-guiding rail of the two-dimensional platform, the X-guiding rail seat is located on the Y-direction slider, the Y-direction slider seat is located on the Y-guiding rail, and the base of the two-dimensional platform is vertically fastened with the connecting piece of the lifting rod Connection, the lifting column and the base are vertically fastened and connected through the connecting piece and the positioning plate, the lifting wheel and the gear shaft are tightly connected with the lifting rod and the lifting column equipped with the rack through the positioning plate and the connecting piece, and the transmission gear on the gear shaft Mesh with the rack on the lifting rod, turn the wheel, the gear shaft drives the rack to lift, control the lifting rod to rise and fall along the Z direction, fix a set of cylinders on the outside of a lifting column, and fix a buffer head on the piston rod of the cylinder to control When the elevating rod descends along the Z direction, it cushions the descending.

The described automatic commissioning system for light and color of flat-panel TVs is that: the video signal source is a mixed signal source group, which is at least composed of RGB, AV, and YPrPb video signal boards; RGB, AV, and YPrPb video signal boards are respectively inserted into the system In the motherboard slot of the host, the video signal board sends signals to the video signal input end of the flat-panel TV under test under the control of the host.

The described automatic adjustment system for light and color of flat-panel TVs is that: the two chromaticity probes configured with dual probes of the system are installed on the probe guide rails of the three-dimensional detection platform, and the distance between the two chromaticity probes can be adjusted by means of the probe guide rails.

The described automatic commissioning system for light and color of flat-panel TVs is: two channels of chromaticity signal analysis and processing channels configured on the color analysis card, and each channel is connected with a chromaticity probe installed on the probe guide rail of the three-dimensional detection platform , a dual-channel color analysis card inserted in the mainboard slot of the system, the signal input terminals of the two channels are shunted to the output terminal of a chroma probe, and receive the output signals of each chroma probe for chroma and brightness analysis Processing, after the output of the two channels is processed by the single-chip microcomputer system on the color analysis card, it is connected to the system host through the RS232 data communication line, and the data is sent to the system host for calculation and processing.

Substantive effects of the present invention:

(1) The composition method of a flat-panel TV chromaticity automatic commissioning system is proposed, which changes the configuration of the existing system composition equipment, so that the system's color analysis card and digital and analog video signal boards are physically and reasonably integrated with the system host. , the composition and configuration are simpler, and the use efficiency is better exerted.

(2) The chromaticity probe based on the combined optical imaging of the lens and aperture bar, which is suitable for liquid crystal (LCD) TV and plasma (PDP) TV, which are both flat-panel TVs, can be used for contact or non-contact measurement. A set of color analyzer measurement process laid the technical foundation.

(3) The plug-in dual-channel color analysis card is adopted, and the color analysis card is directly inserted into the spare slot of the system motherboard, which can not only avoid crowded workstation space, but also save system equipment investment. The system adopts dual chroma probes and dual The configuration of channel color analysis, thus, significantly improves the investment benefit and production efficiency.

(4) The economical mixed signal source configured by the flat-panel TV chromaticity automatic commissioning system. The mixed signal source is composed of multiple analog and digital signal source boards. Each signal source board mainly provides grayscale signals with controllable brightness. The system uses The economical mixed signal source is not only very convenient for light color detection and automatic debugging, but also the system configuration can save the construction cost.

(5) The flat-panel TV chromaticity automatic commissioning system adopts a dual-probe configuration, and the distance between the two-color probes and the position of the measuring probe relative to the flat-panel TV under test are adjusted by means of the three-dimensional movement of the detection platform to meet the color requirements of LCD color TVs and PDP color TVs. It can meet the requirements of high-degree commissioning and large screen size of flat-panel TVs of various specifications, improve the quality and efficiency of flat-panel TV commissioning, and reduce the personnel and cost of the measurement process.

Description of drawings

Fig. 1 is a block diagram of the device structure of the method for forming the light and color automatic commissioning system for a flat-panel TV according to the present invention;

Fig. 2 is a functional block diagram of an embodiment of an automatic light and color commissioning system for a flat-panel TV according to the present invention;

Fig. 3 is a design principle diagram of the chromaticity probe lens of the flat-panel TV for the automatic light color adjustment system of the flat-panel TV according to the present invention;

Fig. 4 is a composition principle diagram of a flat-panel TV dual-lens chromaticity probe of the light color automatic commissioning system for a flat-panel TV according to the present invention;

Fig. 5 is a composition schematic diagram of an embodiment of a flat-panel TV double-lens chromaticity probe embodiment of the light and color automatic commissioning system for flat-panel TVs of the present invention;

FIG. 6 is a schematic structural diagram of a three-dimensional detection platform for a flat-panel TV according to an embodiment of an automatic light and color adjustment system for a flat-panel TV according to the present invention.

Detailed ways

Further detailed description will be made below in conjunction with accompanying drawings 4-6.

Figure 4 shows the principle diagram of the dual-lens chromaticity probe for a flat-panel TV automatic light color adjustment system of the present invention. The chromaticity probe is composed of two groups of lenses 41 and 42 , aperture bar 43 , three groups of color filters 44 , three photoelectric conversion devices 45 (such as silicon photocells), circuit board 46 , amplifier 47 and data transmission device 48 .

Red, green and blue three chromaticity sensing elements composed of three groups of glass color filters 44 and silicon photocells 45 are placed on the imaging surface, and their relative spectral sensitivity is corrected to the standard chromaticity observer spectrum recommended by the International Commission on Illumination. Stimulus value, when the red, green and blue chromaticity elements receive the light stimulus value, the three-stimulus value X, Y, Z of the measured target can be calculated by one integration, and the three-stimulus value X, Y, Z of the measured target, The color coordinates of the color TV can be calculated, and the stimulus value Y is the brightness Y.

The technical scheme of the present invention adopts the chromaticity probe based on the combined optical imaging of double lens and hole bar, and satisfies the adaptability requirement that the chromaticity probe must adopt the optical imaging lens because of the different brightness on each direction of the LCD TV; by the probe in Fig. 3 The principle of lens imaging design shows that the illuminance E of the imaging surface is proportional to the brightness of the light-emitting surface, the area of the lens D, and the transmittance τ of the lens, and inversely proportional to the square of the distance r ₂ from the lens to the imaging surface, and the structural parameters of the lens barrel r ₂ , τ, and S are all constants, so the illuminance E of the imaging surface is only proportional to the brightness Y of the light-emitting surface, and the detection result does not change with the change of the measurement distance r ₁ . When the distance changes, the measurement results can remain unchanged, and the selection range is preferably 0-140mm. The chromaticity probe with the optical imaging structure shown in Figure 4 can be used to measure the color coordinates and luminance of flat-panel TVs and CRT TVs in contact or non-contact at close range, and the contact measurement with a distance of 0 or the non-contact measurement with a distance can be selected. Can meet the color measurement requirements.

Fig. 5 is a structural principle diagram of an embodiment of a flat panel TV chromaticity probe of the present invention. The chromaticity probe consists of a lens barrel 506 with a hole bar 505, two 503 lens 1 and 504 lens 2 of the same size, three groups of color filters 507, three silicon photocells 508, a color filter seat 509, and a circuit with an amplifier Plate 510, end cover 512 with plug 514 and 501 pressure ring 1, spacer ring 502, end cover 512, 513 pressure ring 2 and fastener 511. The two convex lenses 503 and 504 used as the imaging objective lens are separated and positioned by spacer 502 , and are fixed on the lens barrel 506 by 501 pressure ring 1 . There are three groups of color filters 507, and the three groups of color filters 507 are fixed on the color filter seat 509. There are three silicon photocells 508 behind the three groups of color filters 507. The model of the silicon photocells is TCC1227, and the three silicon photocells are installed on On the circuit board 510 , the circuit board 510 is fixed on the color filter seat 509 with fasteners 511 . The end cap 512 is mounted on the outside of the color filter seat 509 , and the end cap 512 is pressed onto the lens barrel 506 with a 513 pressure ring 2 , and a plug 514 is installed on the end cap 512 .

The outer diameter _Φ1 of the lens barrel 506 ranges from 50 to 70mm, and there is a hole bar 505 in the middle of the lens barrel. The diameter of the hole bar _Φ2 ranges from 10 to 25mm. Between the sheets, the distance r1 between the aperture bar 505 and the centerlines of lens 1 and lens ₂ ranges from 65mm to 75mm, and the distance _r2 between the aperture bar 505 and the color filter 507 ranges from 35mm to 45mm.

The light passing through the three sets of filters is photoelectrically converted by the silicon photocell and the output signal amplified by the amplifier on the circuit board becomes an analog voltage signal, which is sent to the data output plug 514 .

The circuit board 510 is fixed on the end cap 512 , and the end cap 512 is fixed on the lens barrel 506 through the pressure ring 531 .

The data output by the chromaticity probe output plug 514 is sent to the processor of the color analysis card for processing through the input socket of the color analysis card.

FIG. 6 is a schematic structural diagram of a three-dimensional detection platform of a flat-panel TV according to an embodiment of an automatic light and color adjustment system for a flat-panel TV according to the present invention.

The three-dimensional detection platform of the flat panel TV consists of a probe moving guide rail 62, a two-dimensional platform 63 in the X direction and a Y direction, a one-dimensional lifting mechanism 65 in the Z direction, a cylinder buffer head 68 and a cylinder 69, a bottom plate 611 with two pairs of rollers 412, and 64 Connector 1, 610 connector 2 and 654 positioning plate 1, 657 positioning plate 2 are composed; wherein:

The probe moving guide rail 62 is installed in parallel on the X guide rail 631, 61-1 probe 1 and 61-2 probe 2 are loaded on the probe moving guide rail 62, and the distance L between the two probes can be adjusted as required by the moving probe.

The X-direction and Y-direction two-dimensional platform 63 includes: X-direction rail 631 and X-direction slider 632, Y-direction slider 633, Y-direction rail 634 and platform base 635, and the moving two-dimensional platform 63 drives the probe to move on the guide rail 62. The two probes move in the X and Y directions at the same time.

The Z-direction one-dimensional lifting mechanism 65 includes: lifting runner 651 and gear shaft 652, rack 653, lifting rod 654 and lifting column 655, and lifting runner 651 and gear shaft 652 are fastened on the lifting column 655 through 656 positioning plate 1 , the gear on the gear shaft meshes with the rack 653.

The base 611 with four rollers 612 forms a rigidly fastened vertical connection with the lifting rod 654 and the lifting column 655 on which the rack is installed through the 657 positioning plate 2 and the 610 connecting piece 2 . The platform base 635 of the two-dimensional platform is vertically fixed on the lifting support rod 654 through the connecting piece 64 , and forms a rigid connection with the one-dimensional lifting mechanism 65 . Thus, a set of three-dimensional detection platform that can move flexibly in X, Y, and Z directions is formed.

Probe 1 and probe 2 installed on the probe moving guide rail, the distance between the two probes can be adjusted, the X-direction and Y-direction two-dimensional platform can adjust the X-direction and Y-direction position coordinates of the probe moving guide rail, and the one-dimensional lifting mechanism can adjust the probe movement The Z-direction height of the guide rail is three-dimensionally moved against the probe moving guide rail according to the measurement requirements, and the distance between the two probes and the measurement position with the flat-panel TV screen are precisely adjusted to meet the screen size and commissioning speed requirements of different specifications of flat-panel TVs.

The present invention proposes a composition method for an automatic light and color commissioning system for flat-panel TVs. The system device formed by the method enables the system's color analysis card and digital and analog video signal boards to be physically and reasonably integrated with the system host. , the system configuration is simpler, the system device adopts a dual-channel color analysis card and two optical imaging chromaticity probe configurations, and the system is equipped with a set of three-dimensional detection platform, so that the two chromaticity probes installed on the detection platform can be easily Three-dimensional adjustment can meet the requirements of light and color measurement of flat-panel TVs with screens of various specifications and sizes, as well as contact or non-contact measurement.

The system device is installed on the light and color test station of the flat-panel color TV production line, and performs non-contact light and color automatic adjustment of the tested liquid crystal (LCD) or plasma (PDP) flat-panel color TV. The speed is fast, the quality is good, and the efficiency of product adjustment is high. Doubled, the use efficiency of the system device can be better played.

Claims (9)

1. A composition method and device for an automatic light and color adjustment system for a flat-panel TV, characterized in that: the composition method for an automatic light and color adjustment system for a flat-panel TV includes at least the following steps: Step 1. First, establish a flat-panel TV light and color automatic commissioning system. The system consists of a system host (1), system software and light and color measurement software (2), a color analysis card (3), a chromaticity probe (4), and a three-dimensional detection platform (5), a video signal source (6) and a data output interface board (7), the system commissioning object is a flat panel TV (8); Step 2, connecting the flat-panel TV (8) under test to the automatic commissioning system for light and color of the flat-panel TV; Step 3, adjust the spacing of the chromaticity probe on the three-dimensional detection platform (5) and its detection distance and position relative to the tested flat panel TV according to the screen size specification of the tested flat panel TV; Step 4. Automatically adjust and measure the light color of the flat panel TV (8) under test: a. Start the system host, call the light color automatic commissioning program, and the system enters the measurement interface; b. Set the relevant parameters of light color automatic commissioning: c. Automatically select the video signal source; d. Debug the white balance of the flat-panel TV under test under different input video signals: ①Start the system white balance measurement and adjustment program; ②Set adjustment parameters; ③The system host controls the signal source to generate the white balance debugging signal of left dark and right white, and receives the measurement result color coordinates x, y and brightness Y from the color analysis card, and displays the error with the standard white field; ④According to the measurement results, automatically adjust the color coordinates and brightness of bright field and dark field; ⑤ After the measurement results of the bright field and dark field are all qualified, store the commissioning results into the corresponding storage unit of the flat-panel TV; complete the white balance measurement and adjustment. 2. The system device for automatic light color adjustment of flat-panel TVs constituted according to the method of claim 1, as shown in Figure 1, is characterized in that: the system device for automatic light color adjustment of flat-panel TVs consists of a system host (1) And system software and light color measurement software (2), color analysis card (3), chromaticity probe (4), three-dimensional detection platform (5), video signal source (6) and output interface board (7), system debugging The object is a flat-panel TV (8); wherein: The system host (1) is an industrial control machine or computer with a display, the host is loaded with an operating system and light color measurement software (2), and the main board is equipped with more than 6 spare slots for color analysis cards and Multiple signal source plug-in slots are provided, the data communication bus and interface of the system host (1) are respectively connected to the output end of the color analysis card (3) and the data communication interface of the flat-panel TV under test (8), and the white balance of the light color adjustment process The data is sent to the flat-panel TV under test through the output interface board (7); Described color analysis card (3) is a plug-in board, and color analysis card (3) is inserted on the main board slot of system host; The output signal of the chromaticity probe (4) is analyzed and processed for chromaticity and brightness, and its output end is connected to the system host (1); The chromaticity probe (4) is a chromaticity probe with an optical imaging lens, which is suitable for light and color measurement of liquid crystal (LCD) color TVs and plasma (PDP) color TVs. The system adopts a dual chromaticity probe configuration, two chromaticity probes The performance is the same, and the light and color measurement rate of the flat-panel TV is improved; The three-dimensional detection platform (5) is at least composed of a two-dimensional platform guide rail and a one-dimensional lifting rod. According to the measurement requirements of flat-panel TVs with different specifications and screen sizes, the two-dimensional platform guide rail and the one-dimensional lifting mechanism are used for three-dimensional movement to adjust the two The distance between the chromaticity probe and the flat-panel TV screen under test and their measurement positions relative to the flat-panel TV screen meet the requirements of large-screen size, commissioning speed and efficiency of various flat-panel TVs; The video signal source (6) is an economical mixed signal source, at least including multiple signal source plug-in boards of RGB, AV, and YPrPb to meet the requirements of light color measurement of flat-panel TVs, and each video signal source plug-in board is installed on the system host (1) In the main board slot, the output end of the mixed signal source is connected to the video signal input end of the flat-panel TV under test, and the selected video signal is transmitted to the video signal input end of the flat-panel TV under test according to the signal source selected by the system host . 3. The automatic commissioning system for flat panel TV light and color according to claim 2, characterized in that: the color analysis card is a dual-channel color analysis card, and the card is equipped with two chrominance signal analysis and processing channels, each channel Matched with the chromaticity probe, it is a dual-channel color analysis card inserted into the main board slot of the system. The signal input terminals of the two channels are connected to the output terminal of a chromaticity probe in a shunt to receive the output signals of each chromaticity probe. Perform chromaticity and brightness analysis and processing. After the output of the two channels is processed by the single-chip microcomputer system on the color analysis card, it is connected to the system host through the RS232 data communication line, and the data is sent to the system host for calculation and processing. 4. The automatic commissioning system for light and color of flat-panel TV according to claim 2, characterized in that: the chromaticity probe is mainly composed of a lens barrel with a hole bar, a lens, a three-color filter, a photoelectric conversion device, and a circuit board And the data transmission plug constitutes, among them: The chromaticity probe is a dual-lens probe for optical imaging. Lens 1 and lens 2 have the same size and are installed in parallel on the lens barrel. The plane where the double lenses are located is perpendicular to the axis of the lens barrel, so that the chromaticity probe can ensure the optical imaging quality; the structure of the lens barrel Parameters The distance r ₂ from the lens to the imaging surface, the transmittance τ of the lens and the area S of the lens are all constants. The illuminance E of the imaging surface is proportional to the brightness Y of the light-emitting surface. The detection result does not change with the change of the distance r _1. When the chromaticity When the probe lens plane changes with the measurement of the flat TV screen, the detection results can remain unchanged. The distance selection range is 0-140mm, and the contact measurement with a distance of 0 or the non-contact measurement with a distance can meet the requirements. Colorimetric measurement requirements; The three-color filter adopts three groups of red, green and blue (RGB) filters, and each group of filters is closely attached to a photoelectric conversion device, and the three photoelectric conversion devices and their output analog signal amplifiers are all installed on a circuit board. The output of the amplifier is connected to the transmission plug, and the photoelectric conversion device of the chromaticity probe is a silicon photocell. 5. The automatic commissioning system for flat panel TV light and color according to claim 2, characterized in that: the three-dimensional detection platform is mainly composed of a probe moving guide rail, a two-dimensional platform in the X direction and a Y direction, a one-dimensional lifting mechanism in the Z direction, and a cylinder The buffer head is composed of the cylinder, the bottom plate and four rollers with lockers; The moving guide rail of the probe is fixed on the X-guiding rail of the two-dimensional platform, the X-guiding rail seat is located on the Y-direction slider, the Y-direction slider seat is located on the Y-guiding rail, and the base of the two-dimensional platform is vertically fastened with the connecting piece of the lifting rod Connection, the lifting column and the base are vertically fastened and connected through the connecting piece and the positioning plate, the lifting wheel and the gear shaft are tightly connected with the lifting and lifting column equipped with the rack through the positioning plate and the connecting piece, the transmission gear on the gear shaft and the The gear rack on the lifting rod meshes and turns the wheel. The gear shaft drives the rack to lift up and down, and controls the lifting rod to rise and fall along the Z direction. A set of cylinders is fixed on the outside of a lifting column, and a buffer head is fixed on the piston rod of the cylinder to control the lifting. Cushioned descent when the rod descends in the Z direction. 6. according to claim 2, be used for flat panel TV light color automatic test system, it is characterized in that: video signal source is mixed signal source group, and it is made up of RGB, AV, YPrPb video signal board at least; RGB, AV, The YPrPb video signal boards are respectively inserted in the mainboard slots of the system mainframe, and the video signal boards send signals to the video signal input end of the flat-panel TV under test under the control of the mainframe. 7. The light and color automatic commissioning system for flat-panel TVs according to claim 2, 4 or 5, characterized in that: the two chromaticity probes configured with dual probes of the system are installed on the probe guide rails of the three-dimensional detection platform, and the probes The guide rail can adjust the distance between the two colorimeter probes. 8. The system according to claim 7, characterized in that: the two chromaticity probes configured with dual probes of the system are installed on the probe guide rails of the three-dimensional detection platform, and the two chromaticity probes can be adjusted by means of the probe guide rails. The distance between the chroma probes. 9. The light and color automatic commissioning system for flat-panel TVs according to claim 2, 3 or 8, characterized in that: there are two chrominance signal analysis and processing channels configured on the color analysis card, and each channel is connected to a three-dimensional The chromaticity probe on the probe guide rail of the detection platform is connected to the dual-channel color analysis card inserted in the main board slot of the system. The output signal of the color probe is analyzed and processed for chromaticity and brightness. After the output of the two channels is processed by the single-chip microcomputer system on the color analysis card, it is connected to the system host through the RS232 data communication line, and the data is sent to the system host for calculation and processing.

Images