White light generating device based on crystallized glass panel and method for adjusting its light color

Abstract

The present invention provides a white light color-producing device based on a crystallized glass panel and its light color adjustment method, and uses light color adjustment technology to make a color-producing device consisting of a crystallized glass panel and a light source produce white light. In the hardware, the necessary devices are a light source and a crystallized glass panel. In the method, the proposed light color adjustment technology adjusts the optical parameters (such as light intensity, spectrum range, spectrum half width) that affect the chromaticity coordinate of the light source based on the filter characteristics of the crystallized glass panel and the white region range in the chromaticity coordinate diagram, so that the transmitted light of the color-producing device consisting of a light source and a crystallized glass panel becomes white light. This device has a simple structure and stable light-emitting characteristics, and can solve the difficult problem that the crystallized glass panel cannot display white by only adjusting the light color of the light source, which is of great significance to the color-producing of the crystallized glass panel.

Description

[Technical Field]

[0001] The present invention uses light color adjustment technology to produce white light in a display device consisting of a crystallized glass panel and a light source. The field includes color mixing adjustment technology, spectral analysis technology, and white display technology in optics, and the application fields include, but are not limited to, stove panel displays, curtain wall displays, space displays, etc. [Background technology]

[0002] Modern crystallized glass possesses excellent properties such as high hardness, corrosion resistance, pressure resistance, and impact resistance, as well as being non-absorbent, dust-resistant, and non-radioactive. Due to these properties, it is widely used in fields such as aerospace, architectural decoration, furniture, home appliances, and consumer electronics. Crystallized glass panel displays used in architectural decoration, furniture, and home appliances often consist of a dark or brown, low-transparency crystallized glass panel sheet (base) and a signal light (light source). Crystallized glass panels combined with signal lights are frequently used as display panels. The signal light informs the user of the device's operating status (on, standby, normal, abnormal, etc.), operating time, and operating mode via the display panel. In home furniture displays (cooker panels, freezers, etc.), small LED digital tubes are generally used as light sources, while in architectural curtain wall displays, LED panels, fluorescent lamps, or quantum dot panels are commonly used. Generally, such displays have the characteristic of being visible light-cutting filters, allowing only red light and infrared light to pass through, making it difficult to meet the diverse display needs of users.

[0003] White is currently the most difficult color to display, as it requires mixing the three primary colors of red, green, and blue in equal proportions. For crystallized glass panels, displaying white is particularly challenging. In conventional technology and implementation, there is only one solution: inserting a filter sheet or filter film between the crystallized glass panel and the light source to produce color (see Patent CN103250004B). This solution not only increases production costs but also reduces the reliability and color lifespan of the display device. More importantly, this solution sacrifices the light intensity of the light source, reducing the display effect of the device, resulting in dull colors, low contrast in bright-field lighting, inconvenience for customers, and safety risks. [Overview of the Initiative]

[0004] The object of the invention is to provide a white light coloring device based on a crystallized glass panel and a method for adjusting the light color thereof. By using the above display device, the power of the light transmitted through the crystallized glass panel is improved in a simple and reliable embodiment, and the light intensity and spectral performance of the optical tool are maximized to display white, thereby solving the technical problems of dull color development and high costs that occur in conventional technology when an optical compensator such as a filter sheet or filter film is inserted between the light source and the crystallized glass panel.

[0005] The technical means of the present invention are as follows:

[0006] A white light color generator based on a crystallized glass panel is provided, the white light color generator comprising a crystallized glass panel and a light source, the crystallized glass panel having a display surface, the light source being located on the non-display side of the crystallized glass panel, and displaying white light or chromatic aberration white light on the display surface of the crystallized glass panel, the chromaticity coordinate region W1 represented in the CIE standard chromaticity system by the transmitted light from the CIE standard illuminator that has passed through the crystallized glass panel is specified by the following coordinates, as shown in Table 1,

[0007] [Table 1] Table 1 Chromaticity coordinate region W1 represented by the transmitted light of the crystallized glass panel

[0008] Light from the light source passes through the crystallized glass panel to display white light. The white chromaticity coordinate region W2 obtained by the CIE whiteness formula and the color tolerance formula is specified by the following coordinates and shown in Table 2.

[0009] [Table 2] Table 2 White chromaticity coordinate region W2 of the white light emitting device

[0010] Preferably, the crystallized glass panel has an average transmittance of 7% or less in the visible light spectrum range of 380 nm to 780 nm.

[0011] Preferably, the spectrum of the light source has 1 to 4 unique peaks, each unique peak corresponding to one light emitter or light emitting material, and each unique peak having a half spectral width of 10 nm or more in the spectrum.

[0012] Preferably, the light emitting device comprising the light source includes one of an LED device, a fluorescent device, and a quantum dot device.

[0013] The present invention further provides a method for adjusting the light color by a white light emitting device based on the crystallized glass panel according to any one of the above items. The method adjusts the optical parameters of the light source including the light intensity and the main wavelength spectral width to adjust the spectral coverage range so that the white light emitted from the light source and transmitted through the crystallized glass panel is positioned in the white chromaticity coordinate region W2.

[0014] Preferably, the method is based on the complementary color law in Grassman's color law. (1) The transmittance function of the crystallized glass panel measured by a photometer is φ iIt is (λ), where i is the number of the crystallized glass panel, and it is a step of calculating the chromaticity coordinate region W1 corresponding to the crystallized glass panel by using the stimulus formula and the color matching function of the CIE standard chromaticity system,

[0015]

Number

number

number

[0017] Preferably, an arbitrary point is selected from the chromaticity coordinate region W1 corresponding to the crystallized glass panel, or the chromaticity coordinate (x) of the known crystallized glass panel is selected. i ,y i Select the point, draw an extension line connecting the selected point to the equi-energy white point (0.333, 0.333) in the chromaticity coordinate diagram, and at any point (excluding the equi-energy white point) on the line segment connecting the intersection of the extension line and the spectral locus line to the equi-energy white point (0.333, 0.333), the dominant wavelength of the spectral color is the complementary dominant wavelength of the standard white light of the light source. The chromaticity coordinates are obtained from the line segment connecting the intersection of the extension line and the spectral locus line to the equi-energy white point (0.333, 0.333) (m i ,n i By arbitrarily selecting a light source and adjusting the optical parameters of the selected light source, the chromaticity coordinates of the light source can be set to (m i ,n i) is adjusted so that the chromaticity coordinate of the light from the light source is (x i ,y i The crystallized glass panel, which is described above, transmits white light with a white chromaticity coordinate of (u,v) through its display surface, enabling it to be displayed on the display surface.

[0018] The advantages of the present invention are as follows:

[0019] (1) This invention uses only a light source and a crystallized glass panel as a white light display device, and through light color adjustment technology, maximizes the spectral performance of the light source and corrects the light transmitted through the crystallized glass panel to display white. The device has a simple structure and high reliability, and compared to another white light display means (Patent No. CN201180059416.5), it does not require the addition of light-shielding ink or filter compensators, has a simple manufacturing process, a high yield rate, and can be used in a variety of application scenes, in particular, it is suitable for white display on stove panels and for high-light-intensity white display scenes in confined spaces such as aerospace. (2) Compared to the prior art (Patent No. CN201180059416.5) white display means, the present invention can maximize the spectral performance (light intensity, spectral range, spectral width) of the light source at the same white light color intensity, has low power consumption, high adjustability of the color temperature of the white light, has a large color tolerance, is suitable for the needs of various display scenes of small signal lights or display units, the color temperature of the provided white range covers from 1670K to positive infinity, and the chromatic aberration is less than 1.5, and the bright / dark illumination (bright-field illumination > 10 cd / m²) 2 , darkfield illumination <1cd / m 2 White can be displayed well with this method. [Brief explanation of the drawing]

[0020] [Figure 1] This is a diagram showing the region ranges of W1 to W4 in Example 1. [Figure 2] This is a spectral transmittance curve diagram of 21 types of glass in Example 1. [Figure 3]This is a spectral distribution diagram of the RGBA four-color lamp beads used in Example 2 at equal power. [Figure 4] This is a transmission spectrum distribution diagram of the crystallized glass panel used in Example 2. [Figure 5] This is a spectral distribution diagram of the RGBA four-color lamp beads used for white display in the white light color generator in Example 2. [Figure 6] This diagram shows the light source, crystallized glass panel, and chromaticity coordinate distribution of the white light color generator in Example 2 when displaying white light. [Figure 7] This is a spectral distribution diagram of the RGB three-color lamp beads used in Example 3 at equal power. [Figure 8] This is a transmission spectrum distribution diagram of the crystallized glass panel used in Example 3. [Figure 9] This is a spectral distribution diagram of the RGB three-color lamp beads used for white display in the white light coloring device in Example 3. [Figure 10] This diagram shows the light source, crystallized glass panel, and chromaticity coordinate distribution of the white light color generator in Example 3 when displaying white light. [Figure 11] This is a spectral distribution diagram of the LED light source used in Example 4 at equal power. [Figure 12] This is a transmission spectrum distribution diagram of the crystallized glass panel used in Example 4. [Figure 13] This is a spectral distribution diagram of the LED light source used for white display in the white light coloring device in Example 4. [Figure 14] This diagram shows the light source, crystallized glass panel, and chromaticity coordinate distribution of the white light color generator in Example 4 when displaying white light. [Figure 15] These are light transmittance spectra before and after attaching a filter compensator to a crystallized glass panel in the comparative example. [Modes for carrying out the invention]

[0021] The present invention will be further described below with reference to examples and drawings, but this will not limit the scope of protection of the present invention. [Examples]

[0022] In this embodiment, a display device consisting of a crystallized glass panel and a light source is made to emit white light using a light color adjustment technique. The chromaticity coordinates of the crystallized glass panel are known information, and the light color is adjusted by adjusting the optical parameters of the light source. This results in white light being displayed on the display surface of the crystallized glass panel. The white light displayed on the display surface is in the white chromaticity coordinate region W2, and the chromaticity coordinates of the incident light on the non-display side are the intrinsic chromaticity coordinates of the light source and are different from the chromaticity coordinates of the display surface.

[0023] The white light color generator consists of a light source and a crystallized glass panel, with black crystallized glass having a visible light transmittance of 7% or less used as the display panel. Based on the CIE 1931 standard chromaticity system, "Methods of Color Representation" (GB / T3977-2008), "Standard Illuminators and Geometric Conditions" (GB / T3978-2008), "Methods for Measuring Object Color" (GB / T3979-2008), and "Measurement of Parameters Related to Architectural Glass, Visible Light Transmittance, Direct Solar Transmittance, Total Solar Energy Transmittance, Ultraviolet Transmittance and Window Glass" (GB / T2680-94), a spectrophotometer was used to achieve a viewing angle of 1° to 4° and a viewing brightness of 10 cd / m². 2 Spectral representation was performed on the 21 crystallized glass panels in the example under experimental conditions such as being larger than the given value, and the transmission spectral power φ of the crystallized glass panels was obtained as shown in Figure 2. i We obtain (λ), and i = 1, 2, 3, ..., 21.

[0024] Based on the calculation method in the above standard, the chromaticity coordinates corresponding to a known crystallized glass panel are calculated using calculation formulas (1-1) to (1-7), and these chromaticity coordinates are located in the above chromaticity coordinate region W1. The visible light transmittance and chromaticity coordinates of the 21 selected crystallized glass panels Table 4 This will be shown.

[0025] [Table 3] Table 4 Visible light transmittance and chromaticity coordinates of 21 types of crystallized glass panels

[0026] It was determined that the chromaticity coordinate region of the crystallized glass panel is W1, and by adjusting the optical parameters of the light source, it was achieved that the light effect generated by light from the light source passing through the display surface of the crystallized glass panel is in the white chromaticity coordinate region W2. The color tolerance of the white light transmitted through the display surface of the crystallized glass panel from the aforementioned light source is 0 to 1.5, and is calculated by the CIE whiteness formula (3-1 to 3-4), where W is the whiteness and T is the lightest color index. W Here, Y is the stimulus value of the displayed white light, and x,y are the chromaticity coordinates of the displayed white light, x n ,y n These are the chromaticity coordinates of a perfect diffuse reflector, which are 0.31006 and 0.31615, respectively.

[0027] W = Y + 800(x n -x)+1700(y n -y)(3-1) T W =1000(x n -x)-650(y n -y)(3-2) 40 <W<5Y-280(3-3) -4 <T W <2(3-4)

[0028] Here, the color temperature Tc is given by equation (3- 5 ) and (3- 6 ) is calculated by,

[0029]

number

[0030] In the formula, A c This is the color temperature line T cThe reciprocal of the slope of the line gives the white chromaticity coordinate region W2, and the light effect generated when light from the above light source passes through the display surface of the crystallized glass panel is in the white chromaticity coordinate region W2, and W2 is specified by the coordinates in Table 5 below.

[0031] [Table 4] Table 5 Chromaticity coordinate range of white light color generator

[0032] Its central position is the chromaticity point of equi-energy white light, with coordinates (0.3333, 0.3333).

[0033] Based on the US national standard ANSI NEMA ANSLG C78.377-2008 (Specifications for the chromaticity of incandescent and solid-state lighting products), the chromaticity coordinate region W4, which is the optimal white color rendering region for color temperatures from 2700k to infinity, was selected from the above white chromaticity coordinate region W2 and is shown in Table 6, with the corresponding white chromaticity coordinate region diagram shown in Figure 1.

[0034] [Table 5] [Table 6] Table 6 Chromaticity coordinate range for optimal white color development in a white light color generator

[0035] Based on the chromaticity coordinate region W4 for optimal white color reproduction and the intrinsic chromaticity coordinate values ​​of the glass, the chromaticity coordinate range of the LED is shown in Figure 1 and determined as shown in Table 7.

[0036] [Table 7] Table 7 Chromaticity coordinates of 21 types of LEDs

[0037] The chromaticity coordinates of a known crystallized glass panel are selected from the chromaticity coordinate region W1 corresponding to the crystallized glass panel, and the obtained maximum intersection region W3, which is adjacent to the white chromaticity coordinate region W2, is the chromaticity coordinate range for adjusting the light color of the light source.

[0038] The dominant wavelength or complementary wavelength is used to create a complementary color based on the Gamut Rings, and a white color with a certain chromatic aberration is obtained. By correcting the intrinsic chromaticity coordinates of the light source within the maximum crossover region range W3 using a light source controller, the light effect generated when light from the light source passes through the display surface of the crystallized glass panel is within the required specified white chromaticity coordinate region W2.

[0039] A light source is selected from the maximum crossover region range W3, and its chromaticity coordinates are measured so that the chromaticity coordinates are such that the light effect generated by the light from the light source passing through the display surface of the crystallized glass panel falls within the required specified white chromaticity coordinate region W2.

[0040] Preferably, an arbitrary point is selected from the chromaticity coordinate region W1 corresponding to the crystallized glass panel, or the chromaticity coordinates of the known crystallized glass panel are selected, an extension line is drawn connecting the selected point to the isoenergy white point (0.333, 0.333) in the chromaticity coordinate diagram, and the dominant wavelength of the spectral color at any point (excluding the isoenergy white point) on the line segment connecting the intersection of the extension line and the spectral locus line to the isoenergy white point (0.333, 0.333) is the complementary dominant wavelength of the standard white light of the light source. By arbitrarily selecting the chromaticity coordinates of a light source from a line segment connecting the intersection of the extension line and the spectral locus line with the equi-energy white point (0.333, 0.333), and adjusting the optical parameters of the selected light source, light from the light source is transmitted through the display surface of the crystallized glass panel, enabling the display of white light with the specified white chromaticity coordinates. [Examples]

[0041] This embodiment changes the color position at which the device emits color by altering the light intensity ratio of RGBA three-color lamp beads, thereby enabling light from a light source with four intrinsic peaks to pass through the display surface of a crystallized glass panel and display white light.

[0042] This embodiment provides a white light generating device equipped with a crystallized glass panel and four RGBA monochromatic LED light sources. By adjusting the light intensity ratio of the four RGBA LEDs, it is possible to display white light by transmitting light from the four RGBA monochromatic LED light sources through the crystallized glass panel. The device used includes a crystallized glass panel and a light source consisting of four RGBA LED lamp beads. The crystallized glass panel has a display surface, and the light source is located on the non-display side of the crystallized glass panel. Figure 3 shows the spectral diagram of the light source at equal power, and its chromaticity coordinates are (0.2941, 0.2363).

[0043] The light source spectrum used has four intrinsic peaks, each corresponding to one light-emitting lamp bead. The red R lamp bead has a characteristic peak (dominant wavelength) of 628 nm, a full width at half maximum (FMAX) of 618 nm to 637 nm, totaling 19 nm, and the color position corresponding to the maximum light intensity is (0.6852, 0.3088). The green G lamp bead has a characteristic peak (dominant wavelength) of 520 nm, a full width at half maximum (FMAX) of 504 nm to 540 nm, totaling 36 nm, and the color position corresponding to the maximum light intensity is (0.1 Table 8 shows the color gamut of the RGBA light source. (783, 0.7207) The blue B lamp bead has a characteristic peak (dominant wavelength) of 460 nm, a full width at half maximum of 450 nm to 472 nm, totaling 22 nm, and the color position corresponding to the maximum light intensity is (0.1410, 0.0491). The amber A lamp bead has a characteristic peak (dominant wavelength) of 592 nm, a full width at half maximum of 581 nm to 602 nm, totaling 21 nm, and the color position corresponding to the maximum light intensity of the light source is (0.5719, 0.4215).

[0044] [Table 8] Table 8 Color Gamut of RGBA 4-Color LED Light Source

[0045] The crystallized glass panel used has a thickness range of 4 mm, exhibits a thin layer structure, and has an average transmittance of 1.47% in the visible light spectral range of 380 nm to 780 nm. The spectral diagram is shown in Figure 4, and its chromaticity coordinates are (0.5791, 0.3383), which falls within the chromaticity coordinate region W1 of the crystallized glass panel.

[0046] The light from the light source used, at equal power, after passing through the display surface of the crystallized glass panel used, has a chromaticity coordinate of (0.5045, 0.2989), displaying pink rather than white. Based on the formula in the light color adjustment technique of Example 1, the chromaticity coordinate of the light source can be calculated to be (0.2236, 0.3391). When the light intensity ratio of the lamp beads is changed, the spectrum of the light source at this time is shown in Figure 5, and the light transmitted through the crystallized glass panel displays white, with the chromaticity coordinate of the transmitted light being (0.3077, 0.3248). Figure 6 shows the chromaticity coordinate distribution of the light source, glass, and device when the device displays white light. As can be seen from the figure, the white light displayed by the device is in the chromaticity coordinate region W4 of the optimal white color development region in Example 1, the crystallized glass panel is in the W1 range, and the selected 4-color LED light source is in the W3 range.

[0047] Furthermore, preferably, an extension line is drawn connecting the chromaticity coordinates (0.5791, 0.3383) of the crystallized glass panel with the isoenergy white point (0.333, 0.333) in the chromaticity coordinate diagram, and the dominant wavelength of the spectral color at any point (excluding the isoenergy white point) on the line segment connecting the intersection of the extension line and the spectral locus line with the isoenergy white point (0.333, 0.333) is the complementary dominant wavelength of the standard white light of the light source. By arbitrarily selecting the chromaticity coordinates of a light source from the line segment connecting the intersection of the extension line and the spectral locus line with the equi-energy white point (0.333, 0.333), and adjusting the optical parameters of the selected light source, the chromaticity coordinates of the light source are adjusted to (0.2236, 0.3391). As a result, light from the light source is transmitted through the display surface of a crystallized glass panel with chromaticity coordinates (0.5791, 0.3383), making it possible to display white light with the specified white chromaticity coordinates (0.3077, 0.3248) on the display surface. [Examples]

[0048] This embodiment changes the color position at which the device emits color by altering the light intensity ratio of RGB three-color lamp beads, thereby enabling light from a light source with three intrinsic peaks to pass through the display surface of a crystallized glass panel and display white light.

[0049] This embodiment provides a white light generating device equipped with a crystallized glass panel and an RGB three-color LED light source. By adjusting the light intensity ratio of the RGB three-color LED light source, it is achieved that light from the RGB three-color LED light source can pass through the crystallized glass panel to display white light. The device used includes a crystallized glass panel and a light source consisting of RGB three-color LED lamp beads. The crystallized glass panel used has a display surface, and the light source is located on the non-display side of the crystallized glass panel. Figure 7 shows the spectral power diagram of the light source at equal power, and at this time, its chromaticity coordinates are (0.1874, 0.2516).

[0050] The light sources used have three characteristic peaks in their spectra, each corresponding to one light-emitting lamp bead. The red R lamp bead has a characteristic peak (dominant wavelength) of 625 nm, a full width at half maximum (FMAX) of 617 nm to 632 nm, totaling 15 nm, and a color position corresponding to the maximum light intensity of (0.6682, 0.3119). The green G lamp bead has a characteristic peak (dominant wavelength) of 525 nm, a FMAX of 493 nm to 542 nm, totaling 39 nm, and a color position corresponding to the maximum light intensity of (0.1777, 0.7468). The blue B lamp bead has a characteristic peak (dominant wavelength) of 455 nm, a FMAX of 448 nm to 465 nm, totaling 17 nm, and a color position corresponding to the maximum light intensity of (0.1474, 0.0351). The color gamut of the RGB light sources is shown in Table 9.

[0051] [Table 9] Table 9: Color Gamut of RGB 3-Color LED Light Sources

[0052] The crystallized glass panel used has a thickness range of 4.27 mm, exhibits a thin layer structure, and has an average transmittance of 2.451% in the visible light spectral range of 380 nm to 780 nm. The spectral diagram is shown in Figure 8, and its chromaticity coordinates are (0.5973, 0.3463), which falls within the chromaticity coordinate region W1 of the crystallized glass panel.

[0053] The light from the light source used is of equal intensity, and after passing through the display surface of the crystallized glass panel used, its chromaticity coordinates are (0.6057, 0.3484), displaying an orangish-red color. Based on the formula in the light color adjustment technique of Example 1, the chromaticity coordinates of the light source can be calculated to be (0.2245, 0.3412). When the light intensity ratio of the light source is changed, the spectral power of the light source is shown in Figure 9, and the light transmitted through the crystallized glass panel displays white, with the chromaticity coordinates of the transmitted light being (0.3248, 0.3315). Figure 10 shows the chromaticity coordinate distribution of the light source, glass, and device when the device displays white light. As can be seen from the figure, the white light displayed by the device is in the chromaticity coordinate region W4 of the optimal white color development region in Example 1, the crystallized glass panel is in the W1 range, and the selected 3-color LED light source is in the W3 range.

[0054] Furthermore, preferably, an extension line is drawn connecting the chromaticity coordinates (0.5973, 0.3463) of the crystallized glass panel with the isoenergy white point (0.333, 0.333) in the chromaticity coordinate diagram, and the dominant wavelength of the spectral color at any point (excluding the isoenergy white point) on the line segment connecting the intersection of the extension line and the spectral locus line with the isoenergy white point (0.333, 0.333) is the complementary dominant wavelength of the standard white light of the light source. By arbitrarily selecting the chromaticity coordinates of a light source from the line segment connecting the intersection of the extension line and the spectral locus line with the equi-energy white point (0.333, 0.333), and adjusting the optical parameters of the selected light source, the chromaticity coordinates of the light source are adjusted to (0.2245, 0.3412). As a result, light from the light source passes through the display surface of a crystallized glass panel with chromaticity coordinates (0.5973, 0.3463), making it possible to display white light with the specified white chromaticity coordinates (0.3248, 0.3315) on the display surface. [Examples]

[0055] This embodiment changes the color position at which the device emits color by altering the spectral range after doping a blue LED with fluorescent powder, thereby enabling light from a light source having two characteristic peaks to pass through the display surface of a crystallized glass panel and display white light.

[0056] This embodiment provides a white light generating device equipped with a crystallized glass panel and a two-color LED light source, and by adjusting the concentration of B+ fluorescent powder, it is realized that light from the two-color LED light source can be transmitted through the crystallized glass panel to display white light. The device used includes a crystallized glass panel and a light source consisting of blue LED lamp beads to which fluorescent powder is added, the crystallized glass panel used has a display surface, and the light source is located on the non-display side of the crystallized glass panel, and the light source is supplied with yttrium aluminum garnet (YAG:Ce 3+ Figure 11 shows the spectral diagram after adding the fluorescent powder. At this time, the chromaticity coordinates are (0.2279, 0.2760), indicating white.

[0057] The light source spectrum used has two intrinsic peaks, corresponding to one light-emitting lamp bead and one type of fluorescent material. The light-emitting lamp bead is a blue LED lamp bead with a characteristic peak (dominant wavelength) of 458 nm and a full width at half maximum of 453 nm to 481 nm, totaling 28 nm. The fluorescence emission material has a characteristic peak (dominant wavelength) of 535 nm and a full width at half maximum of 505 nm to 580 nm, totaling 75 nm.

[0058] The crystallized glass panel used has a thickness range of 3.95 mm, exhibits a thin layer structure, has an average transmittance of 0.8% in the visible light spectral range of 380 nm to 780 nm, its spectral diagram is shown in Figure 12, and its chromaticity coordinates are (0.5927, 0.3214), which are within the chromaticity coordinate region W1 of the crystallized glass panel described in claim 1.

[0059] The light from the light source used, after passing through the display surface of the crystallized glass panel used, has a chromaticity coordinate of (0.2279, 0.2260), displaying blue. Based on the formula in the light color adjustment technique of Example 1, the chromaticity coordinate of the light source can be calculated to be (0.2176, 0.3405). By changing the concentration of the fluorescent powder doped in the hot melt of the lamp bead package, the spectrum of the light source at this time is shown in Figure 13, and the light transmitted through the crystallized glass panel displays white, with the chromaticity coordinate of the transmitted light being (0.3262, 0.3311). Figure 14 shows the chromaticity coordinate distribution of the light source, glass, and device when the device displays white light. As can be seen from the figure, the white light displayed by the device is in the chromaticity coordinate region W4 of the optimal white color development region in Example 1, the crystallized glass panel is in the W1 range, and the selected 3-color LED light source is in the W3 range.

[0060] Preferably, an extension line is drawn connecting the chromaticity coordinates (0.5927, 0.3214) of the crystallized glass panel with the isoenergy white point (0.333, 0.333) in the chromaticity coordinate diagram, and the dominant wavelength of the spectral color at any point (excluding the isoenergy white point) on the line segment connecting the intersection of the extension line and the spectral locus line with the isoenergy white point (0.333, 0.333) is the complementary dominant wavelength of the standard white light of the light source. By arbitrarily selecting the chromaticity coordinates of a light source from the line segment connecting the intersection of the extension line and the spectral locus line with the equi-energy white point (0.333, 0.333), and adjusting the optical parameters of the selected light source, the chromaticity coordinates of the light source are adjusted to (0.2176, 0.3405). As a result, light from the light source is transmitted through the display surface of a crystallized glass panel with chromaticity coordinates (0.5927, 0.3214), enabling the display of white light with the specified white chromaticity coordinates (0.3262, 0.3311) on the display surface. Comparative Example

[0061] A crystallized glass panel with i=21 was selected, and its LED spectrum was compared with the method of adding a filter film in patent CN103250004B. Figure 15 shows the light transmittance spectrum diagrams before and after attaching a filter compensator to the resulting crystallized glass panel. As can be seen from the figure, the means of adding a filter film or compensator reduces the transmittance of the crystallized glass panel, and the crystallized glass panel maintains almost the same transmittance for the red, green, and blue wavelength bands in white light. As a result, the LED consisting of RGB three-color lamp beads still retains its original color after passing through the crystallized glass panel. The present invention achieves the display of white light by adjusting the light color of the light source without reducing the transmittance of the crystallized glass panel, and without adding any objects to the light source or display panel. Both ultimately display white light, but the chromaticity of the light sources used is different.

[0062] In particular, the color-generating device and light color adjustment method are especially applicable to the white light display of crystallized glass stove panels. Crystallized glass with relatively low light transmittance can be selected, preferably with a light transmittance of 0.2-3%. When there is no need to add means such as light-shielding ink or filter compensators, the light intensity and spectral performance of the optical tool are maximized, the light power transmitted through the crystallized glass is enhanced to display white light, and the displayed white light is strong, making the device on the non-display side invisible or difficult to see.

Claims

1. A method for adjusting the color of light using a white light coloring device based on a crystallized glass panel, The aforementioned white light coloring device, Includes a crystallized glass panel and a light source, The crystallized glass panel has a display surface, The light source is located on the non-display side of the crystallized glass panel and causes white light to be displayed on the display surface of the crystallized glass panel. The chromaticity coordinates in the CIE 1931 standard chromaticity system of the light transmitted from the CIE standard light source D65 that passed through the crystallized glass panel are within the chromaticity coordinate region W1 shown in [Table 1]. 【number】 By adjusting the optical parameters of the light source, including light intensity and dominant wavelength spectral width, and thereby adjusting the spectral coverage range, the chromaticity coordinates of the white light displayed after light emitted from the light source passes through the crystallized glass panel are within the white chromaticity coordinate region W2 shown in [Table 2]. 【number】 No filter is provided between the light source and the crystallized glass panel. The aforementioned light color adjustment method is based on the complementary color law in the Grassman color law. (1) The transmittance function of the crystallized glass panel measured by a photometer is φ ｉ (λ) where i is the number of the crystallized glass panel, and the step of calculating the chromaticity coordinate region W1 corresponding to the crystallized glass panel using the stimulation formula and color matching function of the CIE standard chromaticity system, [Math 1] In the formula, X ｉ , Y ｉ Z ｉ x is the tristimulus value of the selected crystallized glass panel, ｉ , y ｉ , z ｉ This is the chromaticity coordinate of the selected crystallized glass panel, [Math 2] Δλ is a tristimulus value function in the CIE 1931 standard chromaticity system, where Δλ is the wavelength pitch and λ is the wavelength. A step of drawing a tangent line to the white chromaticity coordinate region W2 through the chromaticity coordinate point of a crystallized glass panel to any chromaticity coordinate of the crystallized glass panel that is within the chromaticity coordinate region W1 corresponding to the crystallized glass panel and does not belong to the white chromaticity coordinate region W2, wherein the region enclosed by the tangent line and the spectral locus line (excluding the region overlapping with the white chromaticity coordinate region W2) is the light color adjustment range W3 of the light source of the white light color generating device, (2) Select a white chromaticity coordinate point (u, v) from the white chromaticity coordinate region W2, and after it is found that the chromaticity coordinates of the crystallized glass panel are (x ｉ , y ｉ ), calculate the chromaticity coordinates (m ｉ , n ｉ ) of the desired light source based on the following formulas 2-1 to 2-2, which is a step of [Math 3] During the ceremony, [Math 4] These are the second derivatives of the chromaticity-wavelength function of crystallized glass with respect to λ, respectively. [Math 5] These are the second derivatives of the chromaticity-wavelength function of the light source with respect to λ, respectively. [Math 6] This is the first derivative of the color matching function with respect to λ in the CIE 1931 standard chromaticity system, which is the step, (3) The chromaticity coordinate is (m) within the range of W3 ｉ ,n ｉ By selecting a light source that is (m) or by adjusting the optical parameters of the selected light source, the chromaticity coordinates of the light source can be set to (m ｉ ,n ｉ ) adjust to (x ｉ , y ｉ The step includes positioning the white light from the light source, which is transmitted through the display surface of the crystallized glass panel, in the white chromaticity coordinate region W2, or making white light with a white chromaticity coordinate point (u, v) displayable, A method for adjusting the color of light using a white light coloring device based on a crystallized glass panel, characterized by the features described herein.

2. The method for adjusting the color of light according to claim 1, characterized in that the crystallized glass panel has an average transmittance of 7% or less in the visible light spectral range of 380 nm to 780 nm.

3. The method for adjusting the light color according to claim 1, characterized in that the spectrum of the light source has one to four intrinsic peaks.

4. The method for adjusting the color of light according to any one of claims 1 to 3, characterized in that the light-emitting device comprising the light source includes one of an LED device, a fluorescent device, and a quantum dot device.

5. Select any point from the chromaticity region W1 corresponding to the crystallized glass panel, or select the known chromaticity coordinate (x) of the crystallized glass panel. ｉ , y ｉ Select the point, draw an extension line connecting the selected point to the equi-energy white point (0.333, 0.333) in the chromaticity coordinate diagram, and at any point (excluding the equi-energy white point) on the line segment connecting the intersection of the extension line and the spectral locus line to the equi-energy white point (0.333, 0.333), the dominant wavelength of the spectral color is the complementary dominant wavelength of white light from the CIE standard light source D65. By arbitrarily selecting a light source from the line segment connecting the intersection of the extension line and the spectral locus line with the equi-energy white point (0.333, 0.333), and adjusting the optical parameters of the selected light source, the chromaticity coordinates of the light source can be set to (m ｉ ,n ｉ ) is adjusted so that the chromaticity coordinate of the light from the light source is (x ｉ , y ｉ The light color adjustment method according to claim 1, characterized in that white light having the white chromaticity coordinate point (u, v) is transmitted through the display surface of the crystallized glass panel, which is a crystalline glass panel, and the white light is displayed on the display surface.

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