Positive light advertising board device

[0025] Example 1

[0026] refer to figure 1 , 2 , 3. This embodiment includes a linear light source 1, a light guide plate 2, and the light guide plate 2 connects to the advertising drawing 6 through the surface of the transparent bump 5 without gaps; On the front of 6, the position of the transparent bump 5 is the outlet of the light in the light guide plate 2, and the distribution coating 7 of the transparent bump matches the content pattern of the advertisement drawing 6, producing a partially emphasized lighting effect.

[0027] The distribution, dot pitch, and height of the transparent bumps 5 can be varied depending on the artist's desired display effect, and there is no specific limitation.

[0028] One end surface 31 of the light guide plate 2 is provided with a linear light source 1, and the other end surface 32 is covered with reflective stickers 4; the linear light source 1 is formed by an arrangement of LED light sources (but not limited thereto).

[0029] The linear light source 1 couples the light into the light guide plate 2 (see figure 1 ), the reflective sticker 4 reflects the light back into the light guide plate 2 to improve the light utilization rate; after the LED light is reflected countless times, it meets the total reflection angle condition (see figure 2 ) light is filled in the light guide plate 2 and cannot be separated, forming a necessary condition for the uniform illumination of the present invention; when the transparent bump 5 touches the surface of the light guide plate 2, the conditions of total reflection optics will change, and part of the LED light will penetrate The object that touches the transparent bump 5 and irradiates the outside of the light guide plate 2 (see figure 2 ), such as advertising drawing 6. A plurality of tiny transparent bumps 5 can be arranged on the surface of the advertisement drawing 6 or the light guide plate 2 by using the technique of screen printing. If the shapes and sizes of the transparent bumps 5 are similar, that is, their optical boundary conditions are similar, and the amount of light derived from a single transparent bump 5 is very similar in terms of the same area. The overall illumination design of advertising drawings will be converted into a simple scalar function relationship between large areas, and the illumination design with characteristics such as general uniformity, gradient grayscale change or color luster can be obtained without the simulation of complex optical program vectors ( see image 3 ). By setting the size (screen number) and density (DPI) of a plurality of tiny transparent bumps 5, it is possible to determine the required illuminance for designing advertising effects, which is a feature of the present invention. The invention utilizes screen printing technology to make precise patterns of 120dpi bumps on the drawings, that is, the distance between the light spots is 0.22mm, which is far smaller than the size of LED products in the industry. The invention is obvious in terms of cost, manufacturing, maintenance, and content expression It is superior to array-type LED products; moreover, advertising printing inks also provide richer colors. The light inside the light guide plate 2 is completely guided to the front of the advertising drawing 6 through the transparent bumps 5, and is conveyed to the eyes of the viewer with a large number of light spots and rich colors. Continuous reflection inside the light guide plate 2, so there is no stray light when watching the picture of the present invention. Screen printing designs with different densities can produce different lighting effects such as uniformity and grayscale. A low-cost advertising drawing 6 has different effects after turning on the active lighting and non-active lighting, which can express a dynamic appeal. For example, it can be Screen-print the company phone number or slogan, etc. on a white background with transparent bumps 5, and you will not know their existence under external lighting; but when the night is dark, after turning on the light source for active lighting, the transparent bumps 5 will turn into luminous bright spots. The white background becomes dark due to the lack of light illumination. This double dynamic effect is another major feature of the present invention. In addition, it is easy to mass-produce, construct, and replace advertising printing objects.

[0030] Example 2

[0031] refer to Figure 4 , this embodiment includes a light guide plate 2, a reflective LCD panel 10, and the transparent bump coating 11 is a macroscopic presentation of the fine transparent bumps printed on the light guide plate 2, with a gradient effect in which the center is dense and gradually loosens around, The linear light source 1 injected laterally can be compensated to form a uniform LED positive light plate 20 , and then positively contact the reflective LCD panel 10 to form an LCD billboard 30 illuminated by LED positive light.

[0032] Transparent bump coating 11, wherein the pitch of the transparent bumps in the central area of ​​the light guide plate 2 is set to 0.15mm, then a better visual effect can be obtained, and the pitch of the transparent bumps in the edge area of ​​the light guide plate 2 is set to 0.30mm, transparent The attenuation of the side light source can be compensated by a simple and gradual distribution of the convex points, so as to obtain a uniform and soft positive light illumination suitable for reading at a close distance.

[0033] Each end surface of the light guide plate 2 is provided with a linear light source 1; the linear light source 1 is formed by an arrangement of LED light sources (but not limited thereto).

[0034] The present invention utilizes a linear light source 1 formed by arranging multiple LED light sources (but not limited thereto), and injects the light emitted by it into the end surface 3 of the light guide plate 2 (see Figure 4 ), the light is continuously reflected in the light guide plate 2, and the light meeting the total reflection condition fills the light guide plate 2 and cannot penetrate to the outside. By planning the distribution of micro-transparent bumps through the characteristics of the optical simulation light source, that is, the linear light source 1 and the light guide plate 2, a very uniform light distribution can be obtained. For example, the distribution density of the transparent bumps on the screen 11 decreases from the central area to the edge area, or the number of dots is adjusted, that is, the duty ratio of black and white in the dots, and the dot output from 1% to 100% duty ratio can be easily set. , to compensate for the attenuation of the light from the light source 1 due to the partial absorption of the transparent bumps with distance.

[0035] The LED light source irradiates the reflective LCD panel 10 in a contact manner, so that all the light is injected into the reflective LCD panel 10 without leakage, so the utilization efficiency of the light is improved, and the stray light is reduced; The liquid crystal layer (Liquid Crystal) in the LCD, the light will penetrate the liquid crystal layer for the first time and be reflected, and then pass through the liquid crystal layer for the second time before entering the eyes of the viewer. For positive lighting reflective LCD panels, on the path of light entering and exiting, all optical components will enter and exit twice, such as liquid crystal layer, color filter surface, polarizing layer, etc. The double shielding effect makes positive lighting LCD more efficient than backlight The black-and-white contrast of the image produced by the illuminated LCD is nearly squared.

[0036] refer to Figure 5 , the present invention can be applied to improve the light transmittance of the LCD panel as a whole. Only part of the unit pixel 50 is specifically light-transmittable, called the pixel opening 51, and the remaining part is the signal line 52, black frame, and TFT driver of the back drive. Component 53, wherein the ratio of the pixel opening 51 to the unit area of ​​the pixel is called the aperture ratio, and the aperture ratio in high-resolution LCDs is only about 60% to 70%. The manufacturing technology of micro lenses (MICRO LENS), such as ultraviolet curing glue (UV curing glue) Cooperate with the baking program of the curvature of the mirror surface, make the miniature transparent bumps 5 on the surface layer of the LCD panel 10, and the miniature transparent bumps 5 are correspondingly arranged at the pixel (pixel element) opening 51, and the LCD panel Each pixel center of 10 forms a 1-1 corresponding relationship, then the light in the light guide plate passes through the transparent bump 5, and the percentage of the light entering the opening 51 will be greatly increased, which can improve related circuits and isolation when making LCD pixels. The shadowing problem associated with the space can improve the luminous flux efficiency of the LCD. The technology of microlens (MICRO LENS) has been widely used in the production of CMOS and CCD sensors to increase the sensitivity of low light, but it is used in the illumination of positive LCD or electronic paper, in addition to increasing the brightness, it can also reduce stray light and increase contrast. The burden of vision when reading is of great development value.

[0037] If the transparent bump 5 and its contact surface are made of polarized material, the light that does not pass through the polarized material will be reflected back into the light guide plate 2 for continued recycling. Under the use of positive lighting, the LCD panel will be more simple and efficient than the existing backlighting.