Cholesterol liquid crystal display device with light source

Abstract

The utility model provides a cholesterol liquid crystal display device with a light source. A cholesterol liquid crystal display module of the cholesterol liquid crystal display device comprises first lower glass, a first conducting layer, a first cholesterol liquid crystal unit, first upper glass, a first flexible circuit board, a plurality of first LED light-emitting elements and first optical protection glue. A first space is formed in the side of the first upper glass, the first LED light-emitting element is arranged in the first space and outside the side edge of the first upper glass, and the center of the light-emitting angle of the first LED light-emitting element is perpendicular to the normal of the first upper glass. The first optical protection glue is filled between the first LED light-emitting element and the first upper glass, a plurality of first light-transmitting particles are mixed in the first optical protection glue, and the refractive index of the first light-transmitting particles is different from that of the first optical protection glue. The utility model further provides a cholesterol liquid crystal display device with a light source, which is formed by the three layers of cholesterol liquid crystal display modules.

Description

Technical Field

[0001] The utility model relates to a liquid crystal display technology, in particular to a cholesterol liquid crystal display device. Background Art

[0002] Cholesteric liquid crystal is one of the main technologies used in e-book displays. It has the characteristics of bistable display, that is, when the picture is still, it almost does not require electricity, so it has the effect of saving electricity. At the same time, cholesteric liquid crystal is a reflective display technology, which can be clearly viewed in the presence of external ambient light, but cannot be viewed in the absence of external ambient light. To solve this problem, front light source is generally used for fill light. Some add a lamp outside the display viewing surface to directly illuminate the display viewing surface, and some will be equipped with a layer of light guide plate to evenly guide the light of the external lamp before irradiating it to the display viewing surface, but the latter will reduce the amount of light input under normal conditions and affect the reflectivity.

[0003] In the prior art, Patent Nos. TW200511881A and CN1721924A disclose a display that uses cholesterol liquid crystal polymers to increase contrast, wherein a conductive layer, a hole transport layer, a light-emitting layer, an electron transport layer and a cathode electrode layer are sequentially stacked on a transparent substrate, and an insulating packaging layer for packaging is provided on the cathode electrode layer, and the hole transport layer is coated with a polymer hole transport material and aligned on the conductive layer, and a light-emitting layer having a cholesterol liquid crystal phase is made on the aligned hole transport layer, and the light-emitting layer is annealed and arranged into a structure that allows the cholesterol liquid crystal light-emitting molecules to induce chiral circularly polarized light, and a circularly polarized optical film is attached to one side of the substrate.

[0004] In the prior art, Patent No. TW202244574A discloses a cholesterol liquid crystal composite display device, including a light absorbing substrate, a first transparent substrate, a second transparent substrate, an LED fill light module disposed between the light absorbing substrate and the first transparent substrate, a control module, a first electrode layer formed on the first transparent substrate, a second electrode layer formed on the second transparent substrate, a first cholesterol liquid crystal layer sandwiched between the first electrode layer and the second electrode layer, and a first light absorbing layer disposed on the second transparent substrate. The projection of the first light absorbing layer on the horizontal plane and the projection of the fill light module on the horizontal plane are offset. The control module controls the fill light module according to the brightness signal. Thereby, when the external brightness is low, the display brightness of the cholesterol liquid crystal composite display device can be enhanced through the fill light module.

[0005] In the prior art, Patent No. TW202407433A discloses a cholesterol liquid crystal composite display device, comprising: a cholesterol liquid crystal reflective display device; a transmissive display device with an LED, located below the cholesterol liquid crystal reflective display device; wherein, when the cholesterol liquid crystal reflective display device is in normal display, the transmissive display device displays in a dark color; when the cholesterol liquid crystal reflective display device is in a transparent state display, the transmissive display device is a general display, and when the cholesterol liquid crystal reflective display device is in a transparent state display, a rated driving mode is used to make the transmittance of the cholesterol liquid crystal reflective display device higher than the transmittance of the cholesterol liquid crystal reflective display device when it is in a normal dark state display.

[0006] The above-mentioned prior art is still difficult to implement in the industry and needs to be optimized and improved. Therefore, the present invention proposes a solution. Summary of the invention

[0007] The purpose of the utility model is to provide a cholesterol liquid crystal display device with its own light source, which integrates LED light source and light guide technology into a cholesterol liquid crystal display to complete a cholesterol liquid crystal display device with its own light source that can be operated and used without an external light source.

[0008] The first preferred embodiment proposed by the utility model is a monochrome display cholesterol liquid crystal display device with its own light source, which has a first cholesterol liquid crystal display module. The first cholesterol liquid crystal display module includes a first lower glass, a first conductive layer, a first cholesterol liquid crystal unit, a first upper glass connected in sequence, and a first flexible circuit board and a plurality of first LED light-emitting elements arranged on the first lower glass and electrically connected to the first conductive layer.

[0009] The horizontal projection of the first upper glass is larger than and covers the horizontal projection of the first cholesterol liquid crystal unit, and the horizontal projection of the first lower glass is larger than and covers the horizontal projection of the first upper glass. A first space is formed at the side of the first upper glass and at the intersection area above the first lower glass. The first LED light-emitting element is arranged in the first space, outside at least one side of the first upper glass, and is electrically connected to the first conductive layer. The first optical protective glue is filled between the first LED light-emitting element and the first upper glass. The first optical protective glue is also mixed with a plurality of first light-transmitting particles, whose refractive index is different from that of the first optical protective glue, thereby achieving a light scattering effect. By means of the light-guiding effect of the first optical protective glue and the light scattering of the first light-transmitting particles, the emitted light of the first LED light-emitting element can be uniformly guided to the top of the first cholesterol liquid crystal unit as its light source, so that the first cholesterol liquid crystal unit produces light reflection and picture display effects. In this way, the cholesterol liquid crystal display device with its own light source can provide monochrome display without an external light source.

[0010] Preferably, the first optical protective adhesive can also extend to cover the first LED light-emitting element to form a better light-guiding effect. The first LED light-emitting element is a packaged LED, or an unpackaged micro-LED or a mini-LED with a base.

[0011] Based on the same technical idea, the utility model then proposes another preferred embodiment, which is a full-color display cholesterol liquid crystal display device with its own light source, comprising the aforementioned first cholesterol liquid crystal display module, a second cholesterol liquid crystal display module arranged above the first cholesterol liquid crystal display module, and a third cholesterol liquid crystal display module arranged above the second cholesterol liquid crystal display module. The second cholesterol liquid crystal display module comprises a second lower glass, a second conductive layer, a second cholesterol liquid crystal unit, a second upper glass, and a second flexible circuit board arranged on the second lower glass and electrically connected to the second conductive layer, wherein the horizontal projection of the second upper glass is larger than and covers the horizontal projection of the second cholesterol liquid crystal unit. The third cholesterol liquid crystal display module comprises a third lower glass, a third conductive layer, a third cholesterol liquid crystal unit, a third upper glass, and a third flexible circuit board arranged on the third lower glass and electrically connected to the third conductive layer, wherein the horizontal projection of the third upper glass is larger than and covers the horizontal projection of the third cholesterol liquid crystal unit.

[0012] The horizontal projection of the second lower glass is larger than and covers the horizontal projection of the second upper glass, and a second space is formed at the side of the second upper glass and at the intersection area above the second lower glass. The self-contained light source cholesterol liquid crystal display device also includes a plurality of second LED light-emitting elements, which are arranged in the second space, outside at least one side of the second upper glass, and electrically connected to the second conductive layer. The self-contained light source cholesterol liquid crystal display device also includes a second optical protective glue, which is filled between the second LED light-emitting element and the second upper glass. The second optical protective glue is also mixed with a plurality of second light-transmitting particles, and the refractive index of the second light-transmitting particles is different from that of the second optical protective glue, thereby achieving a light scattering effect.

[0013] The horizontal projection of the third lower glass is larger than and covers the horizontal projection of the third upper glass, and a third space is formed at the side of the third upper glass and at the intersection area above the third lower glass. The cholesterol liquid crystal display device with its own light source also includes a plurality of third LED light-emitting elements, which are arranged in the third space, outside at least one side of the third upper glass, and electrically connected to the third conductive layer. The cholesterol liquid crystal display device with its own light source also includes a third optical protective glue, which is filled between the third LED light-emitting element and the third upper glass. The third optical protective glue is also mixed with a plurality of third light-transmitting particles, and the refractive index of the third light-transmitting particles is different from that of the third optical protective glue, thereby achieving a light scattering effect.

[0014] Preferably, the second optical protective glue can also extend to cover the second LED light-emitting element to form a better light-guiding effect; the second LED light-emitting element is a packaged LED, or an unpackaged micro-LED or a mini-LED with a base. Preferably, the third optical protective glue can also extend to cover the third LED light-emitting element to form a better light-guiding effect; the third LED light-emitting element is a packaged LED, or an unpackaged micro-LED or a mini-LED with a base.

[0015] By means of the light-guiding effect of the first optical protective glue and the light scattering of the first light-transmitting particles, the emitted light of the first LED light-emitting element can be uniformly guided to the top of the first cholesterol liquid crystal unit as its light source, so that the first cholesterol liquid crystal unit produces light reflection and picture display. By means of the light-guiding effect of the second optical protective glue and the light scattering of the second light-transmitting particles, the emitted light of the second LED light-emitting element can be uniformly guided to the top of the second cholesterol liquid crystal unit as its light source, so that the second cholesterol liquid crystal unit produces light reflection and picture display. By means of the light-guiding effect of the third optical protective glue and the light scattering of the third light-transmitting particles, the emitted light of the third LED light-emitting element can be uniformly guided to the top of the third cholesterol liquid crystal unit as its light source, so that the third cholesterol liquid crystal unit produces light reflection and picture display. In this way, the cholesterol liquid crystal display device with its own light source can provide full-color display without the need for an external light source.

[0016] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the utility model more obvious and easy to understand, the preferred embodiments are listed below and explained in detail with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The included drawings are used to provide a further understanding of the embodiments of the utility model, which constitute a part of the specification, are used to illustrate the implementation of the utility model, and together with the text description, explain the principle of the utility model. Obviously, the drawings described below are only some embodiments of the utility model, and are not used to limit the implementation of the utility model. For ordinary technicians in this field, other drawings can be derived from these drawings without paying creative labor.

[0018] The drawings include:

[0019] Figure 1 This is the first preferred embodiment of the utility model, a three-dimensional schematic diagram of a cholesterol liquid crystal display device with its own light source;

[0020] Figure 2This is the first preferred embodiment of the utility model, a cross-sectional schematic diagram of a cholesterol liquid crystal display device with its own light source;

[0021] Figure 3 This is a schematic diagram of a configuration method of the first LED light emitting element in the first preferred embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of another implementation of the first optical protective adhesive in the first preferred embodiment of the present utility model;

[0023] Figure 5 yes Figure 1 A portion in the figure is enlarged, showing a schematic diagram of the combination of the first LED light emitting element and the first conductive layer;

[0024] Figure 6 This is a second preferred embodiment of the present invention, a three-dimensional schematic diagram of a cholesterol liquid crystal display device with its own light source;

[0025] Figure 7 This is a second preferred embodiment of the utility model, a cross-sectional schematic diagram of a cholesterol liquid crystal display device with its own light source;

[0026] Figure 8 It is a schematic diagram of another implementation of the first optical protective glue, the second optical protective glue, and the third optical protective glue in the second preferred embodiment of the utility model;

[0027] Fig. 9 This is another configuration position of the reflective sheet in the second preferred embodiment of the utility model.

[0028] Figure annotation:

[0029] Self-contained light source cholesteric liquid crystal display device 1, 2; first cholesteric liquid crystal display module 10; first lower glass 101; first upper glass 102; first cholesteric liquid crystal unit 103; first space 104; first optical protective glue 105; first light-transmitting particles 1051; first flexible circuit board 106; first conductive layer 108; first perforation 1081; first conductive sheet 1082; first LED light-emitting element 109; first reflective sheet 110; second cholesteric liquid crystal display module 20; second lower glass 201; second upper glass 202; second ... Cholesterol liquid crystal unit 203; second space 204; second optical protective glue 205; second light-transmitting particles 2051; second flexible circuit board 206; second conductive layer 208; second LED light-emitting element 209; second reflective sheet 210; third cholesteric liquid crystal display module 30; third lower glass 301; third upper glass 302; third cholesteric liquid crystal unit 303; third space 304; third optical protective glue 305; third light-transmitting particles 3051; third flexible circuit board 306; third conductive layer 308; third LED light-emitting element 309 DETAILED DESCRIPTION

[0030] The specific structural and functional details disclosed herein are merely representative and are for the purpose of describing exemplary embodiments of the present invention. However, the present invention can be specifically implemented in many alternative forms and should not be interpreted as being limited to the embodiments described herein.

[0031] In the description of the present utility model, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. Except for the applicant's special emphasis and limitation of their functions, they are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof all mean "at least including".

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrally formed connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments. Unless the context clearly indicates otherwise, the singular forms "one", "one" and "item" used herein are also intended to include the plural. It should also be understood that the terms "include" and / or "comprise" used herein specify the existence of stated features, steps, operations, units and / or components, without excluding the existence or addition of one or more other features, steps, operations, units, components and / or combinations thereof.

[0034] First preferred embodiment

[0035] The first preferred embodiment of the utility model is a cholesterol liquid crystal display device 1 with its own light source. Figures 1 to 5 The self-contained light source cholesteric liquid crystal display device 1 has a first cholesteric liquid crystal display module 10, which includes a first lower glass 101, a first conductive layer 108, a first cholesteric liquid crystal unit 103, a first upper glass 102, a first flexible circuit board 106, and a plurality of first LED light-emitting elements 109 connected in sequence. The first flexible circuit board 106 is disposed on the first lower glass 101 and is electrically connected to the first conductive layer 108.

[0036] The horizontal projection of the first upper glass 102 is larger than and covers the horizontal projection of the first cholesterol liquid crystal unit 103, and the horizontal projection of the first lower glass 101 is larger than and covers the horizontal projection of the first upper glass 102. Therefore, a first space 104 is formed at the side of the first upper glass 102 and at the intersection area above the first lower glass 101. Figure 2 As shown. The first LED light emitting element 109 is a self-contained light source of the first cholesteric liquid crystal display module 10, and is disposed in the first space 104, and is electrically connected to the first conductive layer 108. Since the first upper glass 102 has four sides, the first LED light emitting element 109 is disposed outside at least one side of the first upper glass 102, and emits light into the first upper glass 102. For a first cholesteric liquid crystal display module 10 of a larger size, the first LED light emitting element 109 can also be disposed on two adjacent sides of the first upper glass 102, two opposite sides, or even on the first upper glass 102. Figure 3 Four sides shown.

[0037] If we look at the cross-sectional view, the light emitted by the first LED light emitting element 109 is not emitted in a single direction in principle, but in a fan shape. Figure 2 In one implementation of this embodiment, in order to achieve a better effect of the light of the first LED light emitting element 109 being emitted into the first upper glass 102, the center of the light emitting angle of the first LED light emitting element 109 is perpendicular to the normal line of the first upper glass 102, and most of the light emitted by the first LED light emitting element 109 can be directly emitted into the first upper glass 102. In other words, the top surface of the LED die in the first LED light emitting element 109 is facing the side of the first upper glass 102, and the first LED light emitting element 109 is connected to the first conductive layer 108 on the first lower glass 101.

[0038] Basically, LED is a point light source, and the uniform light effect is poor. In order to achieve better light guiding and uniform light effect, the cholesterol liquid crystal display device 1 with its own light source also includes a first optical protective glue 105, which is filled between the first LED light emitting element 109 and the first upper glass 102. Figure 2 and Figure 5 . The first optical protective glue 105 also contains a plurality of first light-transmitting particles 1051, whose refractive index is different from that of the first optical protective glue 105. When light encounters the first light-transmitting particles 1051, interface refraction and interface reflection will occur at the interface between the first optical protective glue 105 and the first light-transmitting particles 1051, and the directions of the refracted light and the reflected light are different from the direction of the incident light. Therefore, when the first light-transmitting particles 1051 are small in size and their number reaches a certain level, the effect of light homogenization can be achieved. In other words, the light emitted by the first LED light-emitting element 109 can be more evenly emitted into the first upper glass 102 after the light-guiding and homogenizing effects of the first optical protective glue 105 and the first light-transmitting particles 1051, and serve as the light source of the first cholesterol liquid crystal unit 103.

[0039] In order to achieve a better light guiding effect, for the first LED light emitting element 109 with a relatively thin thickness, the first optical protective glue 105 further extends to cover the first LED light emitting element 109, such as Figure 4 As shown, the light emitted upward by the first LED light emitting element 109 can also be guided into the first upper glass 102 .

[0040] In order to reduce the thickness of the cholesterol liquid crystal display device 1 with its own light source, the first lower glass 101 and the first upper glass 102 are preferably thin glass sheets with a thickness of 0.1 to 0.7 mm. The first LED light-emitting element 109 is a packaged LED, and an unpackaged micro-LED or a mini-LED with a base can also be used. Due to the small size of micro-LED and mini-LED, they can be arranged more densely after forming an LED array. If used as a light source, the difference in brightness can be reduced, and the overall light uniformity is better.

[0041] The first LED light emitting element 109 is electrically connected to the first conductive layer 108, preferably, by anisotropic conductive adhesive, lead-free solder or other metal welding. In addition, other methods can also be used for electrical connection, such as Figure 5 As shown, the cholesterol liquid crystal display device 1 with its own light source also includes a plurality of first conductive sheets 1082, the first conductive layer 108 is further formed with a plurality of first through holes 1081, the first LED light-emitting element 109 is electrically fixed to the first conductive sheet 1082, the first conductive sheet 1082 is fixed to the first lower glass 101 through the first through holes 1081, and is electrically connected to the first conductive layer 108.

[0042] Based on the same technical concept, the present invention further proposes a second preferred embodiment, which is a cholesterol liquid crystal display device 2 with its own light source, see Figure 6 To Fig. 9 .

[0043] The cholesterol liquid crystal display device 2 with its own light source includes a first cholesterol liquid crystal display module 10, a second cholesterol liquid crystal display module 20, and a third cholesterol liquid crystal display module 30. The second cholesterol liquid crystal display module 20 is sequentially arranged above the first cholesterol liquid crystal display module 10, and the third cholesterol liquid crystal display module 30 is sequentially arranged above the second cholesterol liquid crystal display module 20. The composition and features of the first cholesterol liquid crystal display module 10 are the same as those of the aforementioned first preferred embodiment. The structures of the second cholesterol liquid crystal display module 20 and the third cholesterol liquid crystal display module 30 are similar to those of the first cholesterol liquid crystal display module 10.

[0044] The second cholesteric liquid crystal display module 20 includes, from bottom to top, a second lower glass 201, a second conductive layer 208, a second cholesteric liquid crystal unit 203, a second upper glass 202, and a second flexible circuit board 206 disposed on the second lower glass 201 and electrically connected to the second conductive layer 208. The horizontal projection of the second upper glass 202 is larger than and covers the horizontal projection of the second cholesteric liquid crystal unit 203, the horizontal projection of the second lower glass 201 is larger than and covers the horizontal projection of the second upper glass 202, and a second space 204 is formed at the side of the second upper glass 202 and at the intersection area above the second lower glass 201.

[0045] The cholesterol liquid crystal display device 2 with its own light source further includes a plurality of second LED light emitting elements 209 , which are used as the second cholesterol liquid crystal display module 20 's own light source and are disposed in the second space 204 and electrically connected to the second conductive layer 208 .

[0046] Since the second upper glass 202 has four sides, the second LED light emitting element 209 is arranged outside at least one side of the second upper glass 202 to emit light into the second upper glass 202. For a second cholesteric liquid crystal display module 20 with a larger size, the second LED light emitting element 209 can also be arranged on two adjacent sides, two opposite sides, or even four sides of the second upper glass 202.

[0047] If we look at the cross-sectional view, the light emitted by the second LED light emitting element 209 is not emitted in a single direction in principle, but in a fan shape. Figure 7 As shown, in one implementation of this embodiment, in order to achieve a better effect of the light of the second LED light emitting element 209 being emitted into the second upper glass 202, the center of the light emitting angle of the second LED light emitting element 209 is perpendicular to the normal line of the second upper glass 202, and most of the light emitted by the second LED light emitting element 209 can be directly emitted into the second upper glass 202. In other words, the top surface of the LED die in the second LED light emitting element 209 is facing the side surface of the second upper glass 202, and the second LED light emitting element 209 is connected to the second conductive layer 208 on the second lower glass 201.

[0048] In order to achieve better light guiding and light homogenizing effects, the cholesterol liquid crystal display device 2 with its own light source also includes a second optical protective glue 205, which is filled between the second LED light emitting element 209 and the second upper glass 202. The second optical protective glue 205 is also mixed with a plurality of second light-transmitting particles 2051, and its refractive index is different from that of the second optical protective glue 205. When light encounters the second light-transmitting particles 2051, interface refraction and interface reflection will occur at the interface between the second optical protective glue 205 and the second light-transmitting particles 2051, and the directions of the refracted light and the reflected light are different from the direction of the incident light. Therefore, when the second light-transmitting particles 2051 are small in size and the number reaches a certain level, the effect of light homogenization can be produced. In other words, the light emitted by the second LED light emitting element 209 can be more evenly injected into the second upper glass 202 after the light guiding and light homogenizing effects of the second optical protective glue 205 and the second light-transmitting particles 2051, and serve as the light source of the second cholesterol liquid crystal unit 203.

[0049] In order to achieve a better light guiding effect, for the second LED light emitting element 209 with a relatively thin thickness, the second optical protective adhesive 205 further extends to cover the second LED light emitting element 209, such as Figure 8 As shown, the light emitted upward by the second LED light emitting element 209 can also be guided into the second upper glass 202 .

[0050] In order to reduce the thickness of the cholesterol liquid crystal display device 1 with its own light source, the second lower glass 201 and the second upper glass 202 are preferably thin glass sheets with a thickness of 0.1 to 0.7 mm. The second LED light-emitting element 209 is a packaged LED, or an unpackaged micro-LED or a mini-LED with a base. Due to the small size of micro-LED and mini-LED, they can be arranged more densely after forming an LED array. If used as a light source, the difference in brightness can be reduced, and the overall light uniformity is better.

[0051] The second LED light emitting element 209 is electrically connected to the second conductive layer 208, preferably, it can be electrically connected by anisotropic conductive adhesive, lead-free solder or other metal welding. In addition, other methods can also be used for electrical connection, for example: the cholesterol liquid crystal display device 2 with its own light source also includes a plurality of second conductive sheets, the second conductive layer 208 is also formed with a plurality of second through holes, the second LED light emitting element 209 is electrically fixed to the second conductive sheet, the second conductive sheet is fixed to the second lower glass 201 through the second through holes, and is electrically connected to the second conductive layer 208.

[0052] The third cholesteric liquid crystal display module 30 comprises, from bottom to top, a third lower glass 301, a third conductive layer 308, a third cholesteric liquid crystal unit 303, a third upper glass 302, and a third flexible circuit board 306 disposed on the third lower glass 301 and electrically connected to the third conductive layer 308. The horizontal projection of the third upper glass 302 is larger than and covers the horizontal projection of the third cholesteric liquid crystal unit 303, the horizontal projection of the third lower glass 301 is larger than and covers the horizontal projection of the third upper glass 302, and a third space 304 is formed at the side of the third upper glass 302 and at the intersection area above the third lower glass 301.

[0053] The cholesterol liquid crystal display device 2 with its own light source further includes a plurality of third LED light emitting elements 309 , which are used as the third cholesterol liquid crystal display module 30 's own light sources and are disposed in the third space 304 and electrically connected to the third conductive layer 308 .

[0054] Since the third upper glass 302 has four sides, the third LED light emitting element 309 is arranged outside at least one side of the third upper glass 302 to emit light into the third upper glass 302. For a third cholesterol liquid crystal display module 30 of a larger size, the third LED light emitting element 309 can also be arranged on two adjacent sides, two opposite sides, or even four sides of the third upper glass 302.

[0055] If we look at the cross-sectional view, the light emitted by the third LED light emitting element 309 is not emitted in a single direction in principle, but in a fan shape. Figure 7 As shown, in one implementation of this embodiment, in order to achieve a better effect of the light of the third LED light emitting element 309 being emitted into the third upper glass 302, the center of the light emitting angle of the third LED light emitting element 309 is perpendicular to the normal line of the third upper glass 302, and most of the light emitted by the third LED light emitting element 309 can be directly emitted into the third upper glass 302. In other words, the top surface of the LED die in the third LED light emitting element 309 is facing the side surface of the third upper glass 302, and the third LED light emitting element 309 is connected to the third conductive layer 308 on the third lower glass 301.

[0056] In order to achieve better light guiding and light homogenizing effects, the cholesterol liquid crystal display device 2 with its own light source also includes a third optical protective glue 305, which is filled between the third LED light emitting element 309 and the third upper glass 302. The third optical protective glue 305 is also mixed with a plurality of third light-transmitting particles 3051, and its refractive index is different from that of the third optical protective glue 305. When light encounters the third light-transmitting particles 3051, interface refraction and interface reflection will occur at the interface between the third optical protective glue 305 and the third light-transmitting particles 3051, and the directions of the refracted light and the reflected light are different from the direction of the incident light. Therefore, when the third light-transmitting particles 3051 are small in size and the number reaches a certain level, the effect of light homogenization can be produced. In other words, the light emitted by the third LED light emitting element 309 can be more evenly injected into the third upper glass 302 after the light guiding and light homogenizing effects of the third optical protective glue 305 and the third light-transmitting particles 3051, and serve as the light source of the third cholesterol liquid crystal unit 303.

[0057] In order to achieve a better light guiding effect, for the third LED light emitting element 309 with a relatively thin thickness, the third optical protective glue 305 further extends to cover the third LED light emitting element 309, such as Figure 8 As shown, the light emitted upward by the third LED light emitting element 309 can also be guided into the third upper glass 302 .

[0058] In order to reduce the thickness of the cholesterol liquid crystal display device 1 with its own light source, the third lower glass 301 and the third upper glass 302 are preferably thin glass sheets with a thickness of 0.1 to 0.7 mm. The third LED light-emitting element 309 is a packaged LED, and an unpackaged micro-LED or a mini-LED with a base can also be used. Due to the small size of micro-LED and mini-LED, they can be arranged more densely after forming an LED array. If used as a light source, the difference in brightness can be reduced, and the overall light uniformity is better.

[0059] The third LED light emitting element 309 is electrically connected to the third conductive layer 308, preferably, it can be electrically connected by anisotropic conductive adhesive, lead-free solder or other metal welding. In addition, other methods can also be used for electrical connection, for example: the cholesterol liquid crystal display device 2 with its own light source also includes a plurality of third conductive sheets, the third conductive layer 308 is also formed with a plurality of third through holes, the third LED light emitting element 309 is electrically fixed to the third conductive sheet, the third conductive sheet is fixed to the third lower glass 301 through the third through hole, and is electrically connected to the third conductive layer 308.

[0060] In this embodiment, the self-contained light source cholesteric liquid crystal display device 2 has three cholesteric liquid crystal display modules, namely, a first cholesteric liquid crystal display module 10, a second cholesteric liquid crystal display module 20, and a third cholesteric liquid crystal display module 30. Therefore, the self-contained light source cholesteric liquid crystal display device 2 can be used for full-color display. At this time, the first cholesteric liquid crystal display module 10 displays a red picture, the second cholesteric liquid crystal display module 20 displays a green picture, and the third cholesteric liquid crystal display module 30 displays a blue picture. The corresponding first LED light emitting element 109, the second LED light emitting element 209, and the third LED light emitting element 309 emit light of red, green, and blue, respectively.

[0061] On the other hand, since the first LED light emitting element 109 and the second LED light emitting element 209 both emit light upward, the light will penetrate the second lower glass 201 and the third lower glass 301 respectively, affecting vision. Therefore, in a preferred embodiment, the present embodiment further provides a first reflective sheet 110 and a second reflective sheet 210, such as Figure 8 and Fig. 9 As shown. The first reflective sheet 110 is disposed on the second lower glass 201 and is relative to the position of the plurality of first LED light-emitting elements 109, and is used to reflect the emitted light of the first LED light-emitting elements 109 that penetrates the first optical protective glue 105 back into the first optical protective glue 105 for light guiding. The second reflective sheet 210 is disposed on the third lower glass 301 and is relative to the position of the plurality of second LED light-emitting elements 209, and is used to reflect the emitted light of the second LED light-emitting elements 209 that penetrates the second optical protective glue 205 back into the second optical protective glue 205 for light guiding. Taking into account the process technology, if etching technology is adopted, the first reflective sheet 110 can be disposed above the second lower glass 201 by etching technology, and the second reflective sheet 210 can be disposed above the third lower glass 301, as shown. Figure 8 If screen printing technology is used, the first reflective sheet 110 can be disposed below the second lower glass 201 by screen printing, and the second reflective sheet 210 can be disposed below the third lower glass 301, as shown. Fig. 9 shown.

[0062] Since the first optical protective glue 105 is mixed with the first light-transmitting particles 1051 for light homogenization, the width of the light range of the first LED light-emitting element 109 penetrating the first optical protective glue 105 and reaching the first reflective sheet 110 is wider than the width of the light range emitted from the first LED light-emitting element 109. Therefore, the width of the first reflective sheet 110 should be greater than the width of the first LED light-emitting element 109, and preferably more than 1.5 times the width of the first LED light-emitting element 109. Similarly, the width of the second reflective sheet 210 should be greater than the width of the second LED light-emitting element 209, and preferably more than 1.5 times the width of the second LED light-emitting element 209.

[0063] In summary, the utility model is characterized in that:

[0064] 1. LED light-emitting elements are arranged in the space formed by the lower glass and the side of the upper glass in the cholesterol liquid crystal display module;

[0065] 2. Fill the space between the upper glass side and the LED light-emitting element with an optical protective glue mixed with light-transmitting particles to serve as a light guide plate.

[0066] The light emitted by the LED light-emitting element can be more evenly projected into the upper glass after being guided and homogenized by the optical protective glue and the light-transmitting particles, and can be used as the embedded light source of the cholesterol liquid crystal display module. In this way, the cholesterol liquid crystal display device with its own light source of the utility model can provide monochrome or full-color display effects without the need for an external light source.

[0067] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment, it is not used to limit the scope of the rights of the utility model. Any technician familiar with this profession can use the above disclosed methods and technical contents to make equivalent implementations without departing from the scope of the technical solution of the utility model. However, any equivalent modifications made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model are still within the scope of the rights of the technical solution of the utility model.

Claims

1. A cholesteric liquid crystal display device with its own light source, comprising a first cholesteric liquid crystal display module (10), wherein the first cholesteric liquid crystal display module (10) comprises a first lower glass (101), a first conductive layer (108), a first cholesteric liquid crystal unit (103), a first upper glass (102) connected in sequence, and a first flexible circuit board (106) arranged on the first lower glass (101) and electrically connected to the first conductive layer (108), wherein the horizontal projection of the first upper glass (102) is larger than and covers the horizontal projection of the first cholesteric liquid crystal unit (103); Features: The horizontal projection of the first lower glass (101) is larger than and covers the horizontal projection of the first upper glass (102), and a first space (104) is formed at the side of the first upper glass (102) and at the intersection area above the first lower glass (101); The self-contained light source cholesteric liquid crystal display device further comprises a plurality of first LED light-emitting elements (109), which are arranged in the first space (104), outside at least one side of the first upper glass (102), and electrically connected to the first conductive layer (108); The cholesterol liquid crystal display device with its own light source further comprises a first optical protective glue (105) filled between the first LED light-emitting element (109) and the first upper glass (102); the first optical protective glue (105) further comprises a plurality of first light-transmitting particles (1051) mixed therein, the refractive index of which is different from that of the first optical protective glue (105).

2. The cholesteric liquid crystal display device with its own light source according to claim 1, characterized in that: The center of the light-emitting angle of the first LED light-emitting element (109) is perpendicular to the normal line of the first upper glass (102).

3. The cholesteric liquid crystal display device with its own light source according to claim 1, characterized in that: The first optical protective adhesive (105) extends to cover the first LED light-emitting element (109).

4. The cholesteric liquid crystal display device with its own light source according to claim 1, characterized in that: The first lower glass (101) and the first upper glass (102) are thin glass sheets with a thickness of 0.1 to 0.7 mm, and the first LED light-emitting element (109) is a packaged LED, an unpackaged micro-LED, or a mini-LED with a base.

5. The cholesteric liquid crystal display device with its own light source according to claim 1, characterized in that: The first LED light-emitting element (109) is electrically connected to the first conductive layer (108) by means of anisotropic conductive adhesive, lead-free solder or other metal welding methods.

6. The cholesteric liquid crystal display device with its own light source according to claim 1, characterized in that: The cholesterol liquid crystal display device with its own light source further comprises a plurality of first conductive sheets (1082), the first conductive layer (108) further comprises a plurality of first through holes (1081), the first LED light emitting element (109) is electrically fixedly connected to the first conductive sheet (1082), the first conductive sheet (1082) is fixed to the first lower glass (101) via the first through holes (1081), and is electrically connected to the first conductive layer (108).

7. The cholesteric liquid crystal display device with its own light source according to claim 1, characterized in that: The first LED light-emitting elements (109) are arranged outside the four side edges of the first upper glass (102).

8. The cholesteric liquid crystal display device with its own light source according to any one of claims 1 to 7, characterized in that: The invention also comprises a second cholesteric liquid crystal display module (20) which is sequentially arranged above the first cholesteric liquid crystal display module (10), and a third cholesteric liquid crystal display module (30) which is sequentially arranged above the second cholesteric liquid crystal display module (20); the second cholesteric liquid crystal display module (20) comprises a second lower glass (201), a second conductive layer (208), a second cholesteric liquid crystal unit (203), a second upper glass (202) which are sequentially connected, and a second flexible circuit board (206) which is arranged on the second lower glass (201) and electrically connected to the second conductive layer (208); The horizontal projection of the second upper glass (202) is larger than and covers the horizontal projection of the second cholesteric liquid crystal unit (203); the third cholesteric liquid crystal display module (30) comprises a third lower glass (301), a third conductive layer (308), a third cholesteric liquid crystal unit (303), a third upper glass (302) connected in sequence, and a third flexible circuit board (306) arranged on the third lower glass (301) and electrically connected to the third conductive layer (308); the horizontal projection of the third upper glass (302) is larger than and covers the horizontal projection of the third cholesteric liquid crystal unit (303); The horizontal projection of the second lower glass (201) is larger than and covers the horizontal projection of the second upper glass (202), and a second space (204) is formed at the side of the second upper glass (202) and at the intersection area above the second lower glass (201); The self-contained light source cholesteric liquid crystal display device further comprises a plurality of second LED light-emitting elements (209), which are arranged in the second space (204), outside at least one side of the second upper glass (202), and electrically connected to the second conductive layer (208); The self-contained light source cholesteric liquid crystal display device further comprises a second optical protective glue (205) filled between the second LED light-emitting element (209) and the second upper glass (202), the second optical protective glue (205) further being mixed with a plurality of second light-transmitting particles (2051), the refractive index of the second light-transmitting particles (2051) being different from that of the second optical protective glue (205); The horizontal projection of the third lower glass (301) is larger than and covers the horizontal projection of the third upper glass (302), and a third space (304) is formed at the intersection area on the side of the third upper glass (302) and above the third lower glass (301); The self-contained light source cholesteric liquid crystal display device further comprises a plurality of third LED light-emitting elements (309), which are arranged in the third space (304), outside at least one side of the third upper glass (302), and electrically connected to the third conductive layer (308); The cholesterol liquid crystal display device with its own light source further comprises a third optical protective glue (305) filled between the third LED light-emitting element (309) and the third upper glass (302); the third optical protective glue (305) is further mixed with a plurality of third light-transmitting particles (3051); the refractive index of the third light-transmitting particles (3051) is different from that of the third optical protective glue (305).

9. The cholesteric liquid crystal display device with its own light source according to claim 8, characterized in that: The center of the light-emitting angle of the second LED light-emitting element (209) is perpendicular to the normal line of the second upper glass (202); and the center of the light-emitting angle of the third LED light-emitting element (309) is perpendicular to the normal line of the third upper glass (302).

10. The cholesteric liquid crystal display device with its own light source according to claim 8, characterized in that: The first optical protective adhesive (105) extends to cover the first LED light-emitting element (109); the second optical protective adhesive (205) extends to cover the second LED light-emitting element (209); and the third optical protective adhesive (305) extends to cover the third LED light-emitting element (309).

11. The cholesteric liquid crystal display device with its own light source according to claim 8, characterized in that: The second lower glass (201) and the second upper glass (202) are thin glass sheets with a thickness of 0.1 to 0.7 mm, and the second LED light-emitting element (209) is a packaged LED, an unpackaged micro-LED, or a mini-LED with a base; the third lower glass (301) and the third upper glass (302) are thin glass sheets with a thickness of 0.1 to 0.7 mm, and the third LED light-emitting element (309) is a packaged LED, an unpackaged micro-LED, or a mini-LED with a base.

12. The cholesteric liquid crystal display device with its own light source according to claim 8, characterized in that: The second LED light-emitting element (209) is electrically connected to the second conductive layer (208) by means of anisotropic conductive adhesive, lead-free solder or other metal welding methods, and the third LED light-emitting element (309) is electrically connected to the third conductive layer (308) by means of anisotropic conductive adhesive, lead-free solder or other metal welding methods.

13. The cholesteric liquid crystal display device with its own light source according to claim 8, characterized in that: The cholesterol liquid crystal display device with its own light source further comprises a plurality of second conductive sheets (2082) and a plurality of third conductive sheets (3082); The second conductive layer (208) is further formed with a plurality of second through holes (2081); the second LED light emitting element (209) is electrically fixed to the second conductive sheet (2082); the second conductive sheet (2082) is fixed to the second lower glass (201) through the second through holes (2081) and is electrically connected to the second conductive layer (208); The third conductive layer (308) is also formed with a plurality of third through holes (3081), the third LED light-emitting element (309) is electrically fixed to the third conductive sheet (3082), the third conductive sheet (3082) is fixed to the third lower glass (301) through the third through holes (3081), and is electrically connected to the third conductive layer (308).

14. The cholesteric liquid crystal display device with its own light source according to claim 8, characterized in that: The second LED light-emitting elements (209) are arranged outside the four sides of the second upper glass (202); and the third LED light-emitting elements (309) are arranged outside the four sides of the third upper glass (302).

15. The cholesteric liquid crystal display device with its own light source according to claim 8, characterized in that: The light emitted by the first LED light-emitting element (109), the second LED light-emitting element (209), and the third LED light-emitting element (309) are red light, green light, and blue light, respectively.

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