A method for preventing display brightness from decreasing under different contrasts

Abstract

The present invention belongs to the technical field of glass light guide plates, and specifically relates to a method for preventing the brightness of a glass light guide plate from decreasing under different contrasts. This method for preventing the brightness of a glass light guide plate from decreasing under different contrasts comprises: a glass light guide plate, wherein the side of the glass light guide plate is provided with a side-entry LED light strip, and the light-emitting surface of the glass light guide plate is provided with a liquid crystal screen; the glass substrate used for the glass light guide plate is ultra-white glass that absorbs pure green light and absorbs narrow-band pure color light, and the glass light guide plate is a light-homogenizing component of a backlight module. This method for preventing the brightness of a glass light guide plate from decreasing under different contrasts has the effect of preventing the brightness from decreasing too much when the contrast of the display is reduced, thereby achieving the effect of reducing the contrast while maintaining the high brightness of the display.

Description

Technical Field

[0001] The present invention belongs to the technical field of glass light guide plates, and in particular relates to a method for preventing the brightness of a display from decreasing under different contrasts. Background Art

[0002] Light guide plates (LGPs) are made from optical-grade acrylic / PC sheets. Light guide points are printed on the bottom surface of the optical-grade acrylic using laser engraving, V-shaped cross-grid engraving, and UV screen printing, using a high-tech material with an extremely high refractive index and no light absorption. The optical-grade acrylic sheet absorbs the light from the lamp where it remains on the surface. When light strikes each light guide point, the reflected light diffuses in all directions, breaking the reflective conditions and exiting from the front of the LGP. The varying density and size of the light guide points ensures uniform illumination from the LGP. A reflective sheet is used to reflect light from the bottom surface back into the LGP, improving light efficiency. For a given area, the LGP achieves high luminous efficiency and low power consumption. Single-sided microstructured array LGPs are typically manufactured using an extrusion process.

[0003] In this application, glass is used as the light guide plate.

[0004] Contrast is the ratio of the brightness of the same point on the screen when it is the brightest (white) to the darkest (black). A high contrast means relatively high brightness and vividness of the colors presented.

[0005] Changing the contrast of the display can increase the brightness of the white screen or reduce the brightness of the black screen. When the contrast of the display screen is reduced, the brightness of the white screen can be reduced or the brightness of the black screen can be increased. For a backlight module with a high color gamut, the brightness of the black screen is lower than that of a backlight module with a low color gamut. Therefore, when using the same LCD screen, when the contrast of the display screen is reduced, the brightness of the white screen is lower.

[0006] For displays that do not pursue high color gamut but have high requirements for display screen brightness, a backlight module with a lower color gamut is selected. When adjusting the display screen contrast, the brightness of the display changes less. Summary of the Invention

[0007] The purpose of the present invention is to provide a method for preventing the brightness of a display from decreasing under different contrasts, so as to solve the technical problem that when a backlight module with a lower color gamut is selected, the brightness of the display changes significantly when the contrast of the display image is adjusted, thereby achieving the purpose of preventing the brightness of the display from decreasing under different contrasts.

[0008] In order to solve the above technical problems, the present invention provides a method for preventing the brightness of a display from decreasing under different contrasts, comprising:

[0009] A glass light guide plate, wherein a side edge of the glass light guide plate is provided with a side-entry LED light strip, and a liquid crystal screen is provided on the light-emitting surface of the glass light guide plate;

[0010] The glass light guide plate includes a glass substrate and light guide points, and a plurality of light guide points are arranged on the side of the glass substrate away from the liquid crystal screen;

[0011] The glass substrate is ultra-white glass that absorbs pure green light and also absorbs pure color light in a narrow band. The glass light guide plate is a light-homogenizing component of the backlight module.

[0012] The beneficial effects of the present invention are:

[0013] 1. Through glass that can absorb narrow-band pure color light, it is possible to prevent the brightness of the display from decreasing too much under different contrasts, and to prevent the brightness from decreasing too much when the contrast of the display is reduced, thereby achieving the goal of maintaining high brightness of the display while reducing the contrast.

[0014] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 2 is a schematic structural diagram of a method for preventing display brightness from decreasing under different contrasts according to the present invention;

[0017] Figure 2 1 is a schematic diagram of spectrum comparison at 100% contrast in the method for preventing display brightness reduction at different contrasts of the present invention;

[0018] Figure 3 It is a schematic diagram of the spectrum contrast at 50% contrast of the present invention.

[0019] In the picture:

[0020] 1. Glass light guide plate;

[0021] 2. Side-entry LED light strip;

[0022] 3. LCD screen;

[0023] 4. Light guide points;

[0024] 5. Glass substrate. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] Example:

[0027] like Figures 1 to 3 As shown, a method for preventing the brightness of a display from decreasing under different contrasts comprises: a glass light guide plate 1, a side edge of the glass light guide plate 1 is provided with a side-entry LED light bar 2, and a liquid crystal screen 3 is provided on the light emitting surface of the glass light guide plate 1;

[0028] The glass light guide plate 1 includes a glass substrate 5 and light guide dots 4. A plurality of light guide dots 4 are provided on the side of the glass substrate 5 away from the liquid crystal screen 3.

[0029] The glass substrate 5 is ultra-white glass that absorbs pure green light and narrow-band pure color light. The glass light guide plate 1 is a light-homogenizing component of the backlight module.

[0030] To sum up: By using glass that can absorb pure color light in a narrow band, the brightness of the display can be improved under different contrasts, thereby preventing the brightness of the display from decreasing.

[0031] Ultra-clear glass, which absorbs pure green light, was used to create an edge-lit light guide plate. This light guide was paired with an edge-lit LED light bar 2 and an LCD screen 3. The brightness, color point, and color gamut of the white screen were tested at 100% and 50% contrast ratios.

[0032] Comparative Example

[0033] Ordinary ultra-clear glass was used to make the edge-entry light guide plate. The transmittance and thickness of the glass were the same as those used in Example 1. The same edge-entry LED light bar 2 and LCD screen 3 were used to test the brightness, color point, and color gamut of the white screen at 100% and 50% contrast ratios.

[0034] Brightness and color contrast at 100% contrast

[0035]

[0036] Brightness and color point contrast at 50% contrast

[0037]

[0038] like Figure 2 and Figure 3 As shown: in the embodiment and the comparative example, when the contrast is adjusted to 100%, the brightness of the two is the same, but when the contrast is adjusted to 50%, the brightness of the embodiment hardly changes, and the brightness of the comparative example decreases significantly. In the spectral curve of the embodiment, there is obvious absorption in the pure green light band, which causes the overall color gamut of the picture to decrease. However, when the color gamut is low, the brightness loss is small when the contrast decreases, and when the color gamut is high, the contrast decreases and the brightness loss is large. The low color gamut light guide plate in the embodiment can match the display field with high brightness requirements but low color gamut requirements.

[0039] The various devices selected in this application are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0040] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0041] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A method for preventing display brightness from decreasing under different contrasts, characterized in that: include: A glass light guide plate (1), wherein a side edge of the glass light guide plate (1) is provided with a side-entry LED light strip (2), and a light-emitting surface of the glass light guide plate (1) is provided with a liquid crystal screen (3); The glass light guide plate (1) comprises a glass substrate (5) and light guide dots (4), and a plurality of light guide dots (4) are provided on a side of the glass substrate (5) away from the liquid crystal screen (3); The glass substrate (5) is ultra-white glass that absorbs pure green light and absorbs narrow-band pure color light, and the glass light guide plate (1) is a light-homogenizing component of the backlight module.

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