Folding desktop remote image read-write device and illumination system
By employing an optical magnification system composed of a beam splitter and a reflector in the foldable desktop image reading and writing device, combined with a flexible light strip of a stepped light strip module, the problem of uneven lighting in the folded state is solved, achieving uniform lighting and rich lighting modes to meet different usage needs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING NEDPLUSAR DISPLAY TECH CO LTD
- Filing Date
- 2025-05-12
- Publication Date
- 2026-05-12
AI Technical Summary
Foldable desktop image reading and writing devices are bulky when not in use and lack uniform lighting, which affects their usability.
An optical magnification system consisting of a beam splitter and a reflector is used, combined with a stepped light strip module. By distributing LED beads with different light effects and color temperatures in the flexible light strip, uniform lighting of the desktop is achieved, and the lighting mode is adjusted by the control system.
It achieves uniform lighting on the desktop even when folded, improves the uniformity of brightness and illuminance, enriches the lighting modes, and meets different usage needs.
Smart Images
Figure CN224232050U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a lighting system for a foldable desktop image reading and writing device, and also to a foldable desktop image reading and writing device. Background Technology
[0002] The problem of myopia among teenagers is becoming increasingly serious. The root cause is that teenagers' eyes spend most of their time focusing on close-up objects, causing their eyeballs to gradually lengthen in order to adapt to near-field imaging. To address this issue, various myopia prevention and control products have emerged on the market.
[0003] Desktop distance vision reading and writing devices utilize optical means to extend the reading and writing distance from near-field to far-field imaging, and are primarily used in the field of myopia prevention and control among teenagers. To ensure a sufficiently large field of view, such as the ability to fully image an open A4-sized book, desktop distance vision reading and writing devices are relatively large, occupying significant desktop space. To reduce the size of desktop distance vision reading and writing devices when not in use, foldable desktop distance vision reading and writing devices are available.
[0004] Desktop far-view reading and writing devices use mirrors and beam splitters to form images. Due to the effect of the beam splitter, the image pattern is dark without supplementary illumination, and supplementary light sources are usually required for illumination. For foldable desktop far-view reading and writing devices, providing uniform illumination poses an even greater challenge. Summary of the Invention
[0005] The primary technical problem to be solved by this utility model is to provide a lighting system for a foldable desktop remote image reading and writing device.
[0006] Another technical problem to be solved by this utility model is to provide a foldable desktop remote image reading and writing device.
[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:
[0008] An illumination system for a foldable desktop image reading and writing device includes: an optical magnification system consisting of a beam splitter and at least one reflector, and two stepped LED strip modules; wherein,
[0009] The stepped light strip module includes a support plate and a flexible light strip fixed to one side surface of the support plate. The support plate is composed of multiple sets of ridges, each set of ridges has two ridge surfaces facing different directions, and all the light beads in the flexible light strip are arranged on the ridge surfaces of the support plate facing the same direction.
[0010] The two stepped LED strip modules are respectively fixed to the back of the left and right frames of the beam splitter so that the LED beads can face the desktop to provide light when the beam splitter is tilted.
[0011] According to the embodiments provided by the present invention, preferably, the flexible light strip includes two types of LED beads with different luminous efficiencies: a first LED bead and a second LED bead, wherein the luminous efficiency of the first LED bead is higher than that of the second LED bead, wherein in the portion farther from the tabletop, the distribution density of the first LED bead is higher than that of the second LED bead, and in the portion closer to the tabletop, the distribution density of the first LED bead is lower than that of the second LED bead.
[0012] Preferably, the first LED bead and the second LED bead have different color temperatures.
[0013] Preferably, in the flexible light strip, two LED beads are distributed on the same roof ridge surface as a light group; the LED bead combinations of the light groups distributed on multiple roof ridge surfaces are respectively: first LED bead-first LED bead, second LED bead-second LED bead, and first LED bead-second LED bead; wherein in the first LED bead-second LED bead combination, the second LED bead is located on the inner side closer to the beam splitter, and the first LED bead is located on the outer side farther away from the beam splitter.
[0014] According to the embodiments provided by the present invention, preferably, the flexible light strip includes a third LED with the same luminous efficacy: wherein the number of the third LEDs on a single ridge surface in the portion farther from the table is greater than the number of the third LEDs on a single ridge surface in the portion closer to the table.
[0015] Preferably, the third LED bead includes LED beads with different color temperatures.
[0016] Preferably, in the control system, all LEDs with the same color temperature are controlled simultaneously as a group.
[0017] Preferably, the lighting mode is controlled by changing the current ratio of two sets of LED beads with different color temperatures.
[0018] Preferably, the current of two sets of LED beads with different color temperatures is changed simultaneously to control the brightness of the light.
[0019] Preferably, the light strips of the two stepped light strip modules, which are respectively fixed in the left and right frames of the beam splitter, can be controlled independently so that the light brightness provided by one of the stepped light strip modules is lower than that provided by the other stepped light strip module.
[0020] Preferably, the support plate is formed by bending a rectangular support plate multiple times along its length, and the two sides of the support plate are provided with slots at the positions corresponding to the bends.
[0021] Preferably, the two stepped LED strip modules are respectively embedded in the left and right frames of the beam splitter, and the left and right frames are made of heat dissipation material.
[0022] Preferably, the surface of the stepped LED strip module is provided with a light-transmitting LED strip cover plate.
[0023] A foldable desktop image reading and writing device includes the above-described lighting system, and the at least one reflector and the beam splitter are rotatable to overlap.
[0024] The lighting system for this foldable desktop image reading and writing device utilizes stepped LED strip modules mounted on the back of the left and right edges of the beam splitter, illuminating the desktop when the beam splitter is tilted. Furthermore, by combining the distribution of LED beads with different luminous effects within the LED strip, the uniformity of illuminance on the desktop is improved, as well as the uniformity of brightness reaching the eyes. Simultaneously, by adjusting the color temperature of the LED beads with different luminous effects within the LED strip, the lighting modes of the system can be enriched. Attached Figure Description
[0025] Figure 1 This is a three-dimensional structural diagram of the folding desktop image reading and writing device provided by this utility model;
[0026] Figure 2 This is another three-dimensional structural diagram of the folding desktop image reading and writing device provided by this utility model;
[0027] Figure 3 This is an exploded view of the illumination system located on the back of the beam splitter;
[0028] Figure 4 This is a structural diagram of a stepped LED strip module;
[0029] Figure 5 Is using Figure 4 The desktop illuminance distribution diagram of the lighting system shown;
[0030] Figure 6 Is using Figure 4 The diagram shows the visual brightness effect of the lighting system. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0034] like Figure 1 and Figure 2 As shown, the foldable desktop far-viewing and writing device provided by this utility model includes a back plate 2, a cover plate 4, and a coaxial optical magnification system composed of a beam splitter 3 and a reflector. The back plate 2 is connected to the upper end of a support 1. The tops of the back plate 2, cover plate 4, and beam splitter 3 are rotatably connected. The beam splitter 3 is positioned between the cover plate 4 and the back plate 2, and the reflector is positioned on the side of the cover plate 4 or back plate 2 facing the beam splitter 3. The reflector is a concave reflector, used to reflect light rays from the desktop (e.g., light reflected from an object placed on the desktop or light emitted from a display screen placed on the desktop), thus achieving image magnification and projection. The beam splitter 3 is a planar beam splitter, tilted between the back plate 2 and the cover plate 4 during use, used to split the light path twice, achieving folding of the light path. This allows the desktop far-viewing and writing device to achieve magnified projection of desktop writing in a small device, enabling long-term viewing at a distance.
[0035] The aforementioned desktop image reading and writing device can switch between an unfolded state and a folded state. The unfolded state corresponds to the use state, where the cover plate 4 is rotated to a position perpendicular to the back plate 2, and the beam splitter 3 is tilted between the cover plate 4 and the back plate 2, with the tilt angle of the beam splitter 3 relative to the back plate 2 between 35° and 55°. The folded state corresponds to the non-use state, where the cover plate 4 and the beam splitter 3 are rotated to overlap with the back plate 2, thereby reducing the size of the desktop image reading and writing device when it is not in use.
[0036] like Figures 2 to 4As shown, to provide supplementary lighting for the desktop image reading and writing device, an illumination system 6 is provided on the back of the left and right frames 5 of the beam splitter 3. Specifically, it consists of two stepped LED strip modules 62 that are tilted and provide illumination to the desktop when in use. The left and right frames 5 of the beam splitter 3 are made of heat-dissipating material, and grooves 61 are provided on the back of the left and right frames 5. The two stepped LED strip modules 62 are respectively embedded in the back of the left and right frames 5 of the beam splitter 3, and light-transmitting LED strip cover plates 64 are provided on the surface of the stepped LED strip modules 62 to seal the grooves and achieve uniform light distribution.
[0037] like Figure 3 and Figure 4 As shown, the stepped light strip module 62 includes a support plate 65 and a flexible light strip 66 fixed to one side surface of the support plate 65. The support plate 65 is composed of multiple sets of ridges, each set of ridges having two ridge surfaces facing different directions. All the LED beads 67 in the flexible light strip 66 are disposed on the ridge surfaces of the support plate 65 facing the same direction. The support plate 65 can be formed by repeatedly bending a rectangular support plate along its length. To prevent damage to the flexible light strip 66 when bending the support plate, slots are provided on both sides of the support plate 65 at the bending positions, thereby ensuring the free extension of the outer portion of the flexible light strip 66.
[0038] like Figure 4 As shown, the flexible light strip 66 includes a flexible substrate and a plurality of LED beads 67 disposed thereon. The flexible substrate can be made of black FPC to reduce reflection from the longitudinal stepped surface, effectively reducing light reception on the back panel 2 located behind the device. The flexible light strip 66 can use the same equivalent LED beads or LED beads with different luminous effects. The two different implementations are described below.
[0039] In a preferred embodiment, the flexible light strip 66 includes two types of LED beads 67 with different luminous efficiencies: a first LED bead and a second LED bead. The luminous efficiency of the first LED bead is higher than that of the second LED bead. By distributing the first and second LED beads on the flexible substrate according to a certain pattern, a highly uniform light distribution can be obtained on the table when the flexible light strip 66 is tilted relative to the table. Specifically, in the part of the flexible light strip 66 farther from the table (i.e., the upper half near the top rotation axis), the distribution density of the first LED bead is higher than that of the second LED bead, and in the part of the flexible light strip 66 closer to the table (i.e., the lower half near the table), the distribution density of the first LED bead is lower than that of the second LED bead.
[0040] To adjust the lighting mode, the first and second LED beads can have different color temperatures. For example, the first LED bead can be a cool white LED bead (color temperature 5000-6500K), and the second LED bead can be a warm white LED bead (color temperature 2700-3300K). By distributing the cool white and warm white LED beads on the flexible substrate in a certain pattern, a highly uniform color distribution can be obtained on the table when the flexible LED strip 66 is tilted relative to the table.
[0041] like Figure 4 In the implementation shown, in the flexible light strip, two LED beads are distributed on the same roof ridge surface as a light group; the LED bead combinations of the light groups distributed on multiple roof ridge surfaces are as follows: first LED bead-first LED bead, second LED bead-second LED bead, and first LED bead-second LED bead; wherein in the first LED bead-second LED bead combination, the second LED bead with lower luminous efficacy is located on the inner side closer to the beam splitter 3, and the first LED bead with higher luminous efficacy is located on the outer side farther away from the beam splitter 3.
[0042] For example, the 24 groups of LED beads arranged sequentially from top to bottom in the flexible LED strip are divided into upper and lower parts. The upper part consists of 12 groups of LED beads arranged in four groups from top to bottom. Each group contains LED beads arranged as follows: LED bead 1-LED bead 1, LED bead 1-LED bead 2, and LED bead 1-LED bead 2. The second LED bead is closer to the inside. In the upper part, the distribution density of the first LED bead is greater than that of the second LED bead. The lower part consists of 12 groups of LED beads arranged in four groups from top to bottom. Each group contains LED beads arranged as follows: LED bead 2-LED bead 2, LED bead 1-LED bead 2, and LED bead 1-LED bead 2. The second LED bead is closer to the inside. In the lower part, the distribution density of the first LED bead is less than that of the second LED bead.
[0043] In another preferred embodiment, the flexible light strip 66 may consist only of third LED beads with the same luminous efficacy. By distributing the third LED beads on the flexible substrate according to a certain pattern, a highly uniform light distribution can be obtained on the table when the flexible light strip 66 is tilted relative to the table. Specifically, the number of third LED beads on individual ridge surfaces in the part farther from the table is greater than the number of third LED beads on individual ridge surfaces in the part closer to the table. For example, the entire flexible light strip 66 can be divided into upper and lower parts or upper, middle and lower parts, such that the number of third LED beads on individual ridge surfaces in the area near the pivot is greater than the number of third LED beads on individual ridge surfaces in the area near the table. To enrich the lighting modes of the lighting system, the third LED beads may include LED beads with different color temperatures. By distributing LED beads of different color temperatures alternately in the flexible light strip 66, the requirements for uniform illuminance and color uniformity on the table can be met simultaneously.
[0044] like Figure 3As shown, the flexible LED strip 66 is connected to the LED strip electronic wire 63. In the control system of the flexible LED strip, all LEDs of the same color temperature are controlled simultaneously as a group. That is, in the example above, all cool white LEDs are controlled as one group, and all warm white LEDs are controlled as another group. By simultaneously changing the current of the two groups of LEDs with different color temperatures, the brightness of the light can be controlled, achieving different brightness effects such as low brightness, medium brightness, and high brightness. By changing the current ratio of the two groups of LEDs with different color temperatures, the light mode can be controlled, enabling switching between drawing mode, night reading mode, and reading / writing mode.
[0045] During the control of the above-mentioned light brightness and light mode, the light strips of the stepped light strip modules fixed in the left and right frames of the beam splitter 3 can be controlled simultaneously, so that the light emission of the stepped light strip modules in the left and right frames of the beam splitter 3 is consistent, so that the desktop can obtain a more uniform illuminance.
[0046] Furthermore, the LED strips of the stepped LED strip modules fixed in the left and right frames of the beam splitter 3 can be independently controlled, so that the brightness of the light provided by one of the stepped LED strip modules is lower than that provided by the other. This reduces shadows caused by hand obstruction in the image during reading and writing. When writing with the left hand, the brightness of the light provided by the left stepped LED strip module is dimmed; when writing with the right hand, the brightness of the light provided by the right stepped LED strip module is dimmed.
[0047] Figure 5 and Figure 6 The desktop illuminance distribution and eye-viewing brightness distribution of the desktop far-viewing reading and writing device using the aforementioned stepped LED strip modules were measured. The brightness of the two stepped LED strip modules on the left and right sides of the beam splitter 3 was adjusted to the highest level, and the desktop illuminance distribution and eye-viewing brightness distribution of the desktop far-viewing reading and writing device were measured separately. The desktop illuminance test results show that the area below the stepped LED strip modules has the highest illuminance, approximately 9470 Lux. The illuminance decreases in the outer area of the desktop. Within a test area of at least 400mm × 300mm (approximately two A4 sizes), the lowest detected illuminance is approximately 6765 Lux. The illuminance uniformity, the ratio of the highest to the lowest illuminance, is approximately 1.4, which is much lower than the AA level threshold (illuminance uniformity in the central reading area less than 3) in the national standard for reading and writing desk lamps. A lower ratio indicates a more uniform illuminance distribution. In the detection of eye brightness distribution, with the exit pupil center as the origin, within a human eye area of not less than 10mm×6mm (covering the entire exit pupil range of the device), the eye brightness is in the range of 400nit to 600nit, and it can be seen that the brightness uniformity of the eye image is very high.
[0048] In summary, the lighting system of the folding desktop image reading and writing device provided by this utility model uses stepped light strip modules located on the back of the left and right frames of the beam splitter to illuminate the desktop when the beam splitter is tilted. Furthermore, preferably, by combining the distribution of LED beads with different luminous effects in the light strip, the uniformity of illuminance on the desktop is improved, and the uniformity of brightness reaching the eyes is also enhanced.
[0049] The foregoing has provided a detailed description of the foldable desktop image reading and writing device and lighting system provided by this utility model. Any obvious modifications made by those skilled in the art without departing from the essential content of this utility model will constitute an infringement of the patent rights of this utility model and will incur corresponding legal liability.
Claims
1. A lighting system for a foldable desktop image reading and writing device, characterized in that, include: An optical magnification system consisting of a beam splitter and at least one reflector, and two stepped LED strip modules; wherein, The stepped light strip module includes a support plate and a flexible light strip fixed to one side surface of the support plate. The support plate is composed of multiple sets of ridges, each set of ridges has two ridge surfaces facing different directions, and all the light beads in the flexible light strip are arranged on the ridge surfaces of the support plate facing the same direction. The two stepped LED strip modules are respectively fixed to the back of the left and right frames of the beam splitter so that the LED beads can face the desktop to provide light when the beam splitter is tilted.
2. The lighting system of the foldable desktop image reading and writing device as described in claim 1, characterized in that: The flexible light strip includes two types of LED beads with different light effects: a first LED bead and a second LED bead. The light effect of the first LED bead is higher than that of the second LED bead. In the part farther away from the table, the distribution density of the first LED bead is higher than that of the second LED bead. In the part closer to the table, the distribution density of the first LED bead is lower than that of the second LED bead.
3. The lighting system of the foldable desktop image reading and writing device as described in claim 2, characterized in that: The first LED and the second LED have different color temperatures.
4. The lighting system of the folding desktop image reading and writing device as described in claim 2 or 3, characterized in that: In the flexible light strip, two LED beads are distributed on the same roof ridge surface as a light group; the LED bead combinations of the light groups distributed on multiple roof ridge surfaces are: first LED bead-first LED bead, second LED bead-second LED bead, and first LED bead-second LED bead; wherein in the first LED bead-second LED bead combination, the second LED bead is located on the inner side closer to the beam splitter, and the first LED bead is located on the outer side farther away from the beam splitter.
5. The lighting system of the foldable desktop image reading and writing device as described in claim 1, characterized in that: The flexible light strip includes a third LED with the same luminous efficacy: wherein the number of the third LEDs on a single ridge surface in the part farther from the table is greater than the number of the third LEDs on a single ridge surface in the part closer to the table.
6. The lighting system of the foldable desktop image reading and writing device as described in claim 5, characterized in that: The third LED chip includes LED chips with different color temperatures.
7. The lighting system of the folding desktop image reading and writing device as described in claim 3 or 5, characterized in that: In the control system, all LEDs with the same color temperature are controlled simultaneously as a group.
8. The lighting system of the foldable desktop image reading and writing device as described in claim 7, characterized in that: The lighting mode is controlled by changing the current ratio of two sets of LEDs with different color temperatures.
9. The lighting system of the foldable desktop image reading and writing device as described in claim 7, characterized in that: Simultaneously changing the current of two sets of LED beads with different color temperatures controls the brightness of the light.
10. The lighting system of the foldable desktop image reading and writing device as described in claim 1, characterized in that: The light strips of the two stepped light strip modules, which are respectively fixed in the left and right frames of the beam splitter, can be controlled independently so that the light brightness provided by one of the stepped light strip modules is lower than that provided by the other stepped light strip module.
11. The lighting system of the foldable desktop image reading and writing device as described in claim 1, characterized in that: The support plate is formed by bending a rectangular support plate multiple times along its length, and the two sides of the support plate have slots at the positions corresponding to the bends.
12. The lighting system of the folding desktop image reading and writing device as described in claim 1, characterized in that: The two stepped LED strip modules are respectively embedded in the left and right frames of the beam splitter, and the left and right frames are made of heat dissipation material.
13. The lighting system of the folding desktop image reading and writing device as described in claim 12, characterized in that: The surface of the stepped LED strip module is provided with a light-transmitting LED strip cover plate.
14. A foldable desktop reading and writing device, characterized in that: The system includes the lighting system as described in any one of claims 1 to 13, wherein the at least one reflector and the beam splitter are rotatable to coincide.